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What is the Fastest Splitting Machine for Natural Stone ?

2025-06-12

In the stone processing industry, stone splitting is a key link in stone processing. Its speed directly affects: overall production efficiency, labor cost control, order delivery cycle, equipment return on investment.


The traditional manual splitting or mechanical splitting methods are not only inefficient, and the quality of the finished product varies. Hydraulic rock splitter have revolutionized the situation. Equipped with a replaceable blade system that provides smooth, repeatable splitting, reducing waste and eliminating the need for over-finishing.


The hydraulic stone splitting machine superior performance is reflected in the following areas:

1. Revolutionary Rapid Lift System
Hydraulic rock splitter adopts optimized hydraulic circuit design, which makes the knife teeth lifting speed 30-40% faster than the traditional equipment, greatly reducing the non-working travel time, and realizing the high-speed cycle of “splitting - resetting - splitting again”.

2. Retractable floating teeth design
Each knife tooth works independently and can be locked automatically, adapting to various uneven stone surfaces.

3. Wedge Chisel Balancing System
This innovative design ensures that the splitting force is evenly distributed, resulting in a neater stone edge line, reducing the need for secondary processing and improving productivity overall.

Hydraulic stone splitter is mainly used as a splitting line for the production of split stone and other finished products, such as building stone, wall stone, curbstone, paving stone. It can also be used as the main machine for semi-finished split stone, for small stone crusher and thin veneer saw.

Hydraulic stone splitter can not be the fastest natural stone splitter without its solid technical foundation:

High-quality materials: the use of high-strength cast iron body and heat-treated hardened high-carbon steel cutter teeth, to ensure the stability of the equipment in high-speed operation.

Open frame design: not only easy to maintain, but also optimize the heat dissipation performance, so that the equipment can maintain efficient operation for a long time.

Intelligent hydraulic system: precisely control the splitting strength and speed to realize the fastest processing under the premise of quality assurance.

In the pursuit of efficiency in the modern stone processing industry, hydraulic splitter it not only has excellent splitting speed and stable performance, but also through the reduction of waste and improve the rate of finished products for you to create more profit margins.

5 Axis CNC Waterjet The Future of Precision Machining

2025-06-12

5 Axis Waterjet, known as the ‘universal knife’, it has ultra-high precision and unlimited creative potential, can provide intelligent solutions for stone mosaic , relief and art decoration and other scenarios, its unique cold cutting characteristics and excellent three-dimensional machining capabilities make it irreplaceable in the field of high-end manufacturing, is the future of precision machining.



What is CNC five-axis waterjet cutting machine?



CNC 5 Axis waterjet cutting machine is an advanced CNC machine tool that uses ultra-high-pressure water flow (usually mixed with abrasives) to cut materials. 5 Axis Waterjet can cut almost any kind of material such as steel, alloy, stone, ceramic, tile, glass, aluminium. Compared with the traditional 3-axis waterjet, the 5-axis system uses X/Y/Z linear axes + A/C rotary axes, which allows the cutting head to achieve more complex angle changes in 3-dimensional space, resulting in more precise cutting tasks. The water jet head can oscillate in any direction, which allows for three-dimensional cutting of complex shapes, such as chamfering and chamfering, and cutting of high-precision conical surfaces, arc surfaces and other complex spatial surfaces.



Core components include: ultra-high-pressure water pump system (usually up to 60,000 psi or higher), five-axis linkage CNC system, precision cutting head, abrasive delivery system, water treatment system, table and positioning system.


Technical Advantages

No thermal deformation cutting: the waterjet's ‘cold cutting’ technology eliminates thermal stress cracks caused by traditional laser or blade processing, ensuring smooth, chip-free stone edges.

Wide material adaptability: can cut metal (including titanium alloy, stainless steel), composite materials, stone, glass, ceramics, plastics and almost all materials.

High-precision processing: five-axis linkage can achieve ±0.05mm cutting accuracy, to meet the needs of aerospace and other demanding fields.

Complex geometry processing: capable of completing complex three-dimensional contour cutting that is difficult to achieve with traditional three-axis machines.


Environmental protection advantage: with the water recycling filtration system and sludge recycling device, 95% of water reuse can be achieved, in line with green manufacturing standards.


AMD Macadamia Nuts Sorting Equipment & Solution

2025-05-26

The macadamia industry is growing amid a rapidly changing world. What worked yesterday might not work tomrrow. Delivering a high quality product to broad base of comsumers is imperative to maintaning prices. And continuous growth in consumption requires continuous innovation.

Macadamia Nuts Sorting Equipment


With leading multi-spectral detection technology, AMD® sorters provide superior detection capabilities to help you eliminate defects in macadamia nuts and ensure consistent food safety.



AMD has introduced a comprehensive inspection and sorting solution for the macadamia nut industry. This solution is applicable to both external and internal inspection of inshell macadamia nuts, as well as color and shape sorting of macadamia kernels, among other functions, assisting enterprises in enhancing both the yield and quality of their products.



INSHELL MACADAMIA NUTS SORTING

External Sorting

AMD® LGY Series Belt-type Optical Sorting Machine can replace manual work and accurately identify the defects of shelled macadamia nuts including obvious breakage, abnormal colour spots, dirty nuts, mold filaments and other substandard products.

Based on visible light technology, the AMD® LGY offers processors the flexibility of sorting different varieties and grades of macadamia nuts in-shell, whole, halves, and pieces.

AMD® LGY Inshell Macadamia Nuts Color Sorting Machine



Internal Sorting
The AMD® KXA6 Series X-ray inspection system can effectively remove the typical internal defects of macadamia nut-in-shell, such as empty, shriveled, discolored, cracked shell, rotten, insect-damaged nuts caused by stink bugs.
Tailored algorithm for macadamia nuts, featuring large yield, high precision, low carry-out, low radiation value.

AMD® KXA6 Series X-ray Inspection System for Inshell Macadamia Nuts




Macadamia Nut Kernel Sorting

Based on AI deep learning, visible light and infrared sorting technology, AMD® P-LGID series sorting equipment can achieve kernel-shell separation while accurately identifying and separating different colours, and rejecting defective products such as insect damage, shrivelled, mouldy and dried.

AMD® P-LGID4 AI Sorting Machine for Macadamia Nut Kernel






Safeguarding food safety in nut processing. Boost efficiency, reduce waste, and minimize labor reliance. AMD® COLOR SORTER take macadamia nuts grading to new levels.





Get in touch with one of our sales manager today and get tailored macadamia nuts sorting machines & solution.

Any inquires, please send to amd.sorting@gmail.com






AMD Provides Shrimp Sorting Machines & Solutions for Seafood Processors

2025-05-26

The shrimp processing machinery market has experienced significant growth in recent years. This growth has created both opportunities and challenges for companies operating in this market.

As we know, the production and processing of shrimp involves several processes. On the one hand, effective shrimp sorting is necessary, and on the other hand, it is essential to ensure that impurities that pose a health risk are removed in order to guarantee the quality of the final product.



Anhui Zhongke Optic-Electronic Sorting Machinery Co., Ltd. has been focusing on R&D and intelligent manufacturing of optical sorting technology for over 20 years, and has been the first to apply deep learning technology to various fields of material sorting, providing high efficiency and high precision shrimp sorting machines and solutions to users worldwide.  "AMD" series of intelligent color sorters ranked top three in the market and successfully exported to more than 100 countries and regions.

Shrimp Color Sorting Machine



AMD® LGY Series Shrimp Sorting Machine

Shrimp Color Sorting Machine
  • Fully Optimized Mechanical Structure: All stainless steel, fully sealed and waterproof, solving the problem of fresh and wet material sticking together and allowing smooth discharge.
  • Optimized Light Path Design: Wide angle light path concentrator to ensure full material coverage and more detailed identification.
  • New Electrical and Communications Architecture: Multi-core parallel processing, color sorting, shape sorting and intelligent sorting solutions can be flexibly combined to run simultaneously.


Example of AMD Shrimp Sorting Machine




Case Study of AMD® LGY Series Shrimp Sorting Machine



AMD® P-LGY Series Deep-Learning-Based Shrimp Sorter

AMD's deep learning series product innovation adopts 12 core technologies such as Kunpeng fusion modelling technology, deep learning algorithm, S-class professional vision system, DgS smart chip, E image processing system, which can recognize materials from multi-dimensional and multi-characteristics such as color, shape, texture, area, light and shade, weight, soft and hard, and cooperate with centroid 3.0 algorithm to comprehensively improve the sorting ability of shape, color and malignant impurity.

Shrimp Color Sorting Machine



Case Study of AMD® P-LGY Series Deep-Learning-Based Shrimp Sorter



AMD® KX640-B pro series X-ray Foreign Matter Detector

The AMD KX640-B pro series X-ray contaminant detector is designed to detect and sort materials containing moisture, such as clams with cracks, snails with empty shells removed, as well as foreign matters such as glass, metal, stones and ceramics.

Color Sorting Machine



Get in touch with one of our sales manager today and get tailored shrimp/prawn sorting machines & solution.







AMD® Walnut Sorting Solutions

2025-05-26

In the competitive world of walnut processing, quality is paramount for consumer satisfaction. AMD's walnut sorting solutions empower processors to efficiently handle walnuts from the orchard to the shelf, ensuring they meet high standards for market appeal and quality.


Walnut Sorting Machine


AMD®  In-Shell Walnuts Sorting

AMD's sorting technology is tailored to each stage of walnut processing, offering efficient and precise solutions.

- LY Series Wet Material Sorter: After washing, the LY Series tackles up to 3 tons per hour, achieving an impressive 99% accuracy. This sorter identifies and removes walnuts with residual hulls, mechanical damage, and impurities, such as soil or debris.

Walnut Sorting Machine

- LG Series for Exterior Sorting: Ideal for visual sorting, the LG Series detects inconsistencies in color, shape, and shell condition, effectively eliminating foreign objects like stones, plastic, and leaves. This ensures that only visually appealing walnuts continue down the line.


Walnut Sorting Machine


- KXA6 Series X-ray Inspection System: Combining X-ray with visible light technology, the KXA6 targets internal quality by detecting defects such as empty shells, mold, or shriveled kernels. This series ensures the highest standard of walnut quality for the marketplace.

Walnut Sorting Machine


AMD®  Walnut Kernels Sorting

For processing walnut kernels, AMD offers specialized solutions that meet the high demands for precision and quality.

- NI, LI, and LG Series for Kernel-Shell Separation: AMD's versatile options adapt to different processing sites and sorting requirements, ensuring efficient separation of kernels and shells.

Walnut Sorting Machine


- LM Series for Half-Kernel Sorting: The LM Series features a slow-speed conveyor system to prevent kernel breakage, and deep learning technology to ensure consistent shape, size, and color. This sorter is ideal for half kernels, achieving superior precision with minimal damage.

Walnut Sorting Machine


- LG Series for High-Precision Kernel Sorting: Equipped with ultra-HD cameras and deep learning technology, the LG Series can identify even subtle color variations, minor defects, and foreign materials, making it suitable for all types of walnut kernels.

walnut sorting machines


- LQC Series for Final Quality Control: Before packaging, AMD® LQC Series eliminates lightweight contaminants such as hair, paper, textiles, and leaves, guaranteeing premium quality.

Walnut Sorting Machine



Empower Your Processing Line with AMD® SORTING


AMD's efficient and intelligent walnut sorting systems help processors stand out in the market by ensuring only the highest-quality walnuts reach consumers. From whole walnuts to kernel processing, AMD delivers unmatched accuracy and quality control, supporting processors in a competitive market. Click to see more AMD nut sorting machines here.



HDPE and PP Separation with NIR Sorting technology

2025-05-26

High-density polyethylene (HDPE) is a widely used and recyclable plastic. Nonetheless, the presence of polypropylene (PP) contamination poses a significant issue in recycled HDPE streams.

NIR sorting for HDPE and PP separation

Plastic Mixture


Can PP and HDPE be recycled together?
PP and HDPE are distinct types of plastic with different chemical compositions and properties. When they are mixed together in the recycling stream, it can result in various issues:

Reduced quality: Mixing PP with HDPE can lead to lower-quality recycled HDPE material. The properties of the resulting plastic may not meet the required standards for certain applications.

Compatibility issues: PP and HDPE have different melting points and processing requirements. Combining them can make it difficult to maintain the consistency and quality of the recycled material during the melting and molding stages.

Material weakness: The combination of PP and HDPE can result in a recycled material that has reduced strength, durability, and performance. This can be problematic, especially in applications where HDPE's mechanical properties are critical.

Identification and Separation of polymers in the industry
One of the biggest challenges facing the plastics recycling industry today is separating all of the various polymers entering the recycling stream. Separating PP from HDPE during the recycling process can be challenging due to their similar appearance. This can result in contamination if they are not adequately separated at recycling facilities.

To mitigate contamination issues, recycling facilities often employ advanced sorting and separation technologies to ensure that PP and HDPE are properly separated. This involves using optical sorters, air classifiers, and other equipment to identify and separate different types of plastics.

Near Infrared (NIR) Sorting Technology

Among them, the NIR-based sorting machines are widely used in the recycling industry to identify and separate various types of plastics based on their unique spectral signatures in the near-infrared range. These machines can accurately differentiate between different polymer types, such as PET, HDPE, PP, PVC, and more, facilitating the efficient recycling of plastics and reducing contamination in the recycling stream.


PP & HDPE Flakes Separation


AMD's plastic color sorting machines are known for the high accuracy and reliability. We contribute to efficient recycling operations by reducing contamination in the recycling stream and ensuring the production of clean, high-quality recycled materials.


Silica Sand Production Processing and Equipment Needed

2025-05-26

What is high grade silica sand used for?

Silica sand is a new type of hard, wear-resistant and stable composite stone with silica as the main component, also called silica, mostly presented as transparent or translucent colourless, with a hardness level of 7 and a relative density of 2.65, with high refractory properties. Silica sand is formed after crushing and sand making, and is a very important industrial raw material.

Due to its chemical stability, good piezoelectricity, high melting point and hardness, High quality silica sand is widely used in glass, chemicals, casting, metallurgy and ceramics after processing.


How is silica sand processed? What kinds of equipment are needed?


METHOD 1: Dry Silica Sand Beneficiation Technology

Raw silica ore is coarsely crushed by jaw crusher → sorted by AMD large ore particle optical sorter → medium and fine crushing by cone crusher → screening by vibrating screen - sorted by AMD dry ore particle optical sorter → sand making by impact sand making machine → acid washing → drying → magnetic separation → sorted by AMD ore powder optical sorter → high purity silica sand is obtained.





METHOD 2: Wet Silica Sand Beneficiation Technology

The wet quartz powder manufacturing process is similar to the dry quartz powder manufacturing process, mainly with restrictions on water source and water quantity requirements, suitable for use in working conditions where environmental requirements are very strict and sufficient water sources are available. The processing flow is as follows.

Raw quartzite is coarsely crushed by jaw crusher → sorted by AMD large ore particle optical sorter → medium and fine crushing by cone crusher → screening-cleaning by vibrating screen → sorted by AMD wet ore particle sorter → sand making by impact sand making machine → acid washing → drying → magnetic separation → sorted by AMD ore powder sorter → get high purity quartz sand.





Optical Sorting Technology For Silica Sand Mining Process

Focusing on cutting-edge intelligent sorting technology, Zhongke Optic-electronic is the largest supplier of ore sorting equipment in China. With strong technical strength and professional service team, Zhongke provides one-stop sorting solutions for ore processing enterprises. The AMD® brand ore sorter under Zhongke widely covers the sorting scenes of large, medium and small particles of metallic and non-metallic minerals. Interested? Check out our ore sorting solutions.





How to maintain a water-cooled screw chiller?

2025-05-23

Water-cooled screw chillers are widely used in industrial cooling water systems and commercial central air conditioning refrigeration. Its normal operation and regular maintenance are essential to ensure the cooling effect of the chiller, extend the life of the water-cooled screw chiller, and avoid unexpected shutdown of the chiller. Next, Oumal Refrigeration will introduce the maintenance points of water-cooled screw chillers in detail to help users better maintain the equipment and ensure its stable operation.


1. Regular inspection: Perform routine inspections to check for leaks, loose connections, or any signs of wear. Check electrical components, refrigerant levels, and water flow.


2. Regular cleaning

External cleaning: Regularly remove dust and dirt from the outside of the unit, keep the surface clean to ensure heat dissipation, use a soft cloth or vacuum cleaner for cleaning, and avoid using water or chemical cleaners.

Internal cleaning: Regularly check the inside of the condenser and evaporator to remove any dirt or impurities that may have accumulated. Professional cleaning agents and tools can be used to ensure internal cleanliness and prevent blockage.


3. Check the cooling system

Cooling water: Check the quality and concentration of cooling water regularly to ensure that it is within the recommended range. If the cooling water is contaminated or the concentration is too high, it may cause scaling or corrosion in the system.

Water pumps and pipes: Check the operating status of the water pump to ensure that it is operating normally. Check the pipes for leaks or blockages and repair them in time.


4. Check the filter: Clean or better the filter regularly to prevent blockage, which reduces airflow and cooling efficiency. Check the lubrication level and ensure that the bearings and moving parts are fully lubricated as recommended by the manufacturer. Check the control settings, sensors and safety devices regularly to ensure their normal operation.


5. Check the refrigeration system

Refrigerant: Check the amount and pressure of refrigerant regularly to ensure that it is within the normal range. If a refrigerant leak is found, contact a professional immediately for repair.

Compressor: Check the operating status of the compressor, pay attention to whether there is any abnormal noise or vibration, and lubricate and maintain the compressor regularly to ensure its normal operation.


6. Electrical system inspection

Wires and cables, check the integrity of wires and cables to ensure that there is no damage or aging, and check whether the wiring is firm to avoid looseness and poor contact.

Control system: Check the operating status of the control system to ensure it is normal, and regularly calibrate and maintain the control system to ensure its accuracy and stability.


7. Record keeping: Keep detailed records of maintenance activities, repairs and maintenance plans. This information helps track the long-term performance of the chiller and helps troubleshoot potential problems.


China water cooled screw chiller


The following is the recommended maintenance schedule for screw water-cooled chillers by Oumal chiller.

Check the compressor lubricating oil level

monthly

Check the water flow of the circulating water system

monthly

Check voltage and power supply

monthly

Check the tightness of wire connections and electrical insulation

Every 3 months

Check and adjust the temperature setting

Every 3 months

Check the filter drier

Every 3 months

Cleaning the heat exchanger and water tower

Every 3 months

Replace the compressor oil filter

40000 Hours


The maintenance of water-cooled screw chillers is the key to ensuring the normal operation of the equipment and extending its service life. By regularly cleaning, checking the cooling system, refrigeration system and electrical system, and paying attention to other matters, users can effectively maintain the equipment and reduce the failure rate. It is recommended that users cooperate with professional maintenance personnel to perform regular professional maintenance to ensure the popular operating status of the equipment.



Lithium-Ion Battery Capacity Degradation Mechanisms

2025-05-23

A lithium-ion battery is primarily composed of a cathode, anode, electrolyte, and separator. During charging, lithium ions de-intercalate from the cathode material, migrate through the electrolyte, and intercalate into the anode material. During discharging, lithium ions move in the reverse direction, de-intercalating from the anode and returning to the cathode through the electrolyte. This repeated intercalation and de-intercalation of lithium ions between the cathode and anode enables the battery’s charge-discharge function, providing electrical energy to devices.

Capacity degradation in lithium-ion batteries is categorized into reversible capacity loss and irreversible capacity loss. Reversible capacity loss is relatively "mild" and can be partially recovered by adjusting charge-discharge protocols (e.g., optimizing charging current, voltage limits) and improving usage conditions (e.g., temperature/humidity control). In contrast, irreversible capacity loss arises from irreversible changes within the battery, leading to permanent capacity reduction. According to GB/T 31484-2015 standards for cycle life testing: "During standard cycle life testing, the discharge capacity shall not fall below 90% of the initial capacity after 500 cycles, or 80% after 1,000 cycles." If the battery exhibits rapid capacity decline within these standard cycle ranges, it is classified as capacity fade failure, typically involving irreversible degradation mechanisms.

lithium-ion battery

I. Material-Related Factors

1. Cathode Material Structural Degradation

Cathode materials undergo complex physical and chemical changes during charge-discharge cycles. Taking spinel-structured LiMn₂O₄ as an example, its structure distorts due to the Jahn-Teller effect during cycling. This distortion accumulates with repeated cycles and may eventually cause cathode particle fracture. Fractured particles degrade electrical contact between particles, hindering electron transport and reducing capacity. Additionally, irreversible phase transitions and structural disordering occur in some cathode materials. For instance, under high voltage, certain cathode materials transition from stable crystal structures to phases unfavorable for lithium-ion intercalation/de-intercalation, impeding lithium-ion mobility and accelerating capacity loss.


2. Excessive SEI Growth on Anode Surfaces

For graphite anodes, interactions between the surface and electrolyte are critical. During the initial charging process, components in the electrolyte undergo reduction reactions on the graphite surface, forming a solid electrolyte interphase (SEI) layer. Normally, the SEI layer is ionically conductive but electronically insulating, protecting the anode from continuous electrolyte corrosion. However, excessive SEI growth poses significant issues. First, SEI formation consumes lithium ions, reducing the available Li⁺ for normal charge-discharge processes and causing capacity loss. Second, transition metal impurities (e.g., from cathode dissolution) deposited on the anode surface can catalyze further SEI growth, accelerating lithium depletion.
Silicon-based anodes, despite their high theoretical capacity, face severe volume expansion (>300%) during lithiation/delithiation. Repeated expansion/contraction causes structural damage, electrode pulverization, and loss of electrical contact, leading to irreversible capacity loss. Although technologies such as nanostructured silicon anodes and silicon-carbon composites mitigate volume effects, this remains a critical challenge for silicon anode commercialization.


3. Electrolyte Decomposition and Degradation

The electrolyte plays a vital role in ion transport. Common lithium salts like LiPF₆ exhibit poor chemical stability and decompose under high temperatures or voltages, reducing available Li⁺ and generating harmful byproducts (e.g., PF₅, which reacts with solvents). Trace moisture in the electrolyte reacts with LiPF₆ to produce hydrofluoric acid (HF), a corrosive agent that attacks cathode/anode materials and current collectors. Poor battery sealing allows external moisture/oxygen ingress, accelerating electrolyte oxidation. Degraded electrolytes exhibit increased viscosity, discoloration, and drastically reduced ionic conductivity, severely impairing battery performance.


4. Current Collector Corrosion

Current collectors (e.g., aluminum foil for cathodes, copper foil for anodes) collect and conduct current. Failures include corrosion and weakened adhesion. Corrosion mechanisms include:
• Chemical corrosion: HF from electrolyte side reactions reacts with collectors, forming poorly conductive compounds that increase interfacial resistance.
• Electrochemical corrosion: For copper foil anodes, dissolution occurs at low potentials. Dissolved copper ions migrate and deposit on cathodes ("copper plating"), reducing collector cross-sectional area and inducing side reactions.
• Adhesion failure: Volume changes during cycling can detach active materials from collectors if adhesion is insufficient, rendering them electrochemically inactive.


5. Trace Impurities in the Battery System

Transition metal impurities (Fe, Ni, Co) introduced via raw materials may participate in redox reactions, catalyze electrolyte decomposition, or compete with Li⁺ intercalation. These impurities also destabilize SEI layers, exacerbating anode side reactions.


II. Operational Environmental Factors

1. Temperature Effects

• High temperatures accelerate electrolyte decomposition and SEI restructuring. LiPF₆ degradation generates PF₅, which reacts with solvents, while SEI layers thicken into inorganic-dominated films with higher ionic resistance. For example, EVs operating in hot climates exhibit accelerated capacity fade.
• Low temperatures increase electrolyte viscosity and polarization, promoting lithium plating on anodes. Lithium dendrites may pierce separators, causing internal shorts.


2. Charge-Discharge Rates (C-Rates)

High C-rates during charging cause uneven lithium deposition, forming dendrites that consume Li⁺ and risk internal shorts. High-rate discharging exacerbates polarization, reducing usable energy and accelerating capacity loss. Power tools requiring frequent high-current discharge demonstrate shortened battery lifespans.


3. Overcharge/Over-Discharge

• Overcharge forces excessive delithiation of cathodes, causing structural collapse and violent electrolyte oxidation (gas generation, swelling, or thermal runaway).

• Over-discharge over-lithiates anodes, destabilizing their structure and inducing electrolyte reduction. Early smartphones without protection circuits showed rapid capacity loss under such abuse.


Consequences of Battery Failure

Severe capacity degradation manifests as insufficient runtime (e.g., short device operation after charging) or abnormal charging behavior (e.g., slow charging). In critical applications:

• Electric vehicles: Battery failure reduces driving range and may strand vehicles.

• Grid-scale energy storage: Failed batteries destabilize power supply reliability, threatening grid security.



At TOB NEW ENERGY, we are committed to being your strategic partner in advancing energy storage technologies. From high-performance battery cathode materials / battery anode materials and specialized binders to precision-engineered separators and tailored electrolytes, we provide a comprehensive suite of battery components designed to elevate your product’s reliability and efficiency. Our offerings extend to cutting-edge battery manufacturing equipment and battery tester, ensuring seamless integration across every stage of battery production. With a focus on quality, sustainability, and collaborative innovation, we deliver solutions that adapt to evolving industry demands. Whether you’re optimizing existing designs or pioneering next-generation batteries, our team is here to support your goals with technical expertise and responsive service. Let’s build the future of energy storage together. Contact us today to explore how our integrated solutions can accelerate your success.

Non-destructive Methods to Detect Lithium Plating

2025-05-23

Lithium plating refers to the detrimental phenomenon where lithium ions fail to intercalate into the graphite anode during charging processes, instead undergoing electrochemical reduction to form metallic lithium deposits. This results in the formation of characteristic silver-gray lithium metal layers or dendritic lithium crystals on the anode surface.

Conventionally, battery disassembly has been the primary method for confirming suspected lithium plating incidents, particularly when observable capacity anomalies or visible dendritic growth are present. However, advanced non-destructive diagnostic techniques now enable accurate detection through sophisticated electrochemical analysis.

Lithium-plating-electrode-sheet

Ⅰ. Advanced Non-Destructive Detection Methodologies:

1. Voltage Profile Deconvolution Analysis

During constant-current (CC) charging cycles, lithium-ion batteries typically exhibit a monotonically increasing voltage curve proportional to state-of-charge (SOC). The emergence of premature voltage plateau depression during the constant-voltage (CV) charging phase serves as a critical indicator of lithium plating. This phenomenon occurs due to the irreversible consumption of active lithium inventory through plating reactions, resulting in diminished reversible capacity and accelerated voltage decline.


2. Differential Capacity Analysis (dV/dQ)

This analytical technique involves calculating the first derivative of voltage with respect to capacity (dV/dQ) to identify characteristic phase transition peaks in graphite anodes. Lithium plating manifests through distinct alterations in these phase transition signatures, including:

• Peak position displacement (>20mV shift indicates severe intercalation obstruction)

• Peak intensity attenuation (reduced magnitude suggests compromised lithium insertion kinetics)

• Peak shape distortion (asymmetric broadening reflects heterogeneous reaction distribution)


3. Electrochemical Impedance Spectroscopy (EIS) Diagnostics

Lithium plating induces significant changes in interfacial charge transfer dynamics:

• Formation of electrically isolated "dead lithium" deposits increases ionic transport resistance

• SEI (Solid Electrolyte Interphase) layer reconstruction alters charge transfer impedance (Rct)

• High-frequency semicircle expansion in Nyquist plots (typically 100Hz-10kHz range) correlates with interfacial impedance growth

• Mid-frequency semicircle deformation reflects lithium deposition-induced charge transfer limitations


4. Ultrasonic Time-of-Flight (TOF) Characterization

This spatially resolved acoustic technique capitalizes on lithium-ion batteries' stratified architecture:

• Baseline TOF calibration establishes reference acoustic signatures

• Lithium deposition creates acoustic impedance discontinuities (ΔZ > 15% indicates significant plating)

• Echo waveform analysis detects:

- Signal amplitude attenuation (5-15dB variation)

- Phase shift anomalies (>5° deviation)

- Time-domain reflection coefficient changes (>8% threshold)

Current technical limitations:

• Primarily applicable to pouch cell configurations (aluminum casing in prismatic cells causes 90%+ ultrasonic attenuation)

• Detection threshold requires minimum 2.8% volume fraction of metallic lithium

• Requires sophisticated signal processing algorithms (e.g., wavelet transform denoising)


. Supplementary Detection Indicators:

• Coulombic efficiency depression (ΔCE > 0.5% per cycle)

• Open-circuit voltage (OCV) relaxation abnormalities

• Differential voltage analysis (dQ/dV) hysteresis expansion

• Thermal signature anomalies during relaxation phases


. Implementation Protocols:

Establish baseline parameters through initial formation cycles

Implement multi-modal detection protocol integration

Apply machine learning algorithms for pattern recognition

Perform cross-validation with reference electrode measurements

This comprehensive approach enables early-stage lithium plating detection with >92% accuracy while maintaining battery integrity, significantly enhancing safety protocols in battery management systems (BMS).


. Elevate Your Battery Safety Standards with TOB NEW ENERGY

At TOB NEW ENERGY, we are committed to being your strategic partner in advancing energy storage technologies. From high-performance cathode materials / anode materials and specialized battery binders to precision-engineered battery separators and tailored battery electrolytes, we provide a comprehensive suite of battery components designed to elevate your product’s reliability and efficiency. Our offerings extend to cutting-edge battery manufacturing equipment and battery tester, ensuring seamless integration across every stage of battery production. With a focus on quality, sustainability, and collaborative innovation, we deliver solutions that adapt to evolving industry demands. Whether you’re optimizing existing designs or pioneering next-generation batteries, our team is here to support your goals with technical expertise and responsive service.

Let’s build the future of energy storage together. Contact us today to explore how our integrated solutions can accelerate your success.

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