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On the second day of CIBF2025, TOB NEW ENERGY experienced a peak in visitor traffic. Our CEO Dany Huang , Sales Director Amy Wang, and team members, leveraging their extensive experience, patiently shared industry trends and product knowledge, leaving a strong impression on visitors while attracting the attention of CCTV reporters. During the event, an exclusive interview with our Sales Director Amy was scheduled to highlight TOB’s achievements and insights. TOB NEW ENERGYspecializes in providing end-to-end solutions for the global new energy industry. Our core services span customized construction of R&D lines, pilot production lines, and mass production lines. We also offer advanced battery equipment R&D and manufacturing, technical consulting, and material supply services. Welcome to our Booth 13T001.

TOB NEW ENERGY is showcase its new product - the Sealed Drying Room,Welcome to Booth 13T001 for Live Demos and Product Insights

Lithium Nickel Manganese Cobalt Oxide(NCM) Conductive Additive Multi-walled Carbon Nanotubes SWCNT Single-walled Carbon Nanotubes Polyvinylidene Fluoride（ PVDF） N-Methylpyrrolidon(NMP) Bombshell Aluminum Foil Graphite powder Carbon Coated Silicon Conductive Carbon black Carboxymethyl Cellulose Polymerized Styrene Butadiene Rubber（SBR） Lithium Polyacrylate PAALi Battery Binder(PAALi) Copper Foil Ceramic Battery Separtor High Temperature Tape(Green) Aluminum Battery Tab Copper Coated Nickel Battery Tab Aluminum Laminated Film

TOB NEW ENERGY, a leading provider of integrated battery manufacturing solutions, is proud to announce its participation in the upcoming CIBF 2025, scheduled for May 15th to 17th, 2025 in Shenzhen. With two decades of industry expertise, the Xiamen-based innovator will present its comprehensive suite of solutions for battery research and production at Booth 13T001. Complete Battery Ecosystem Solutions As a turnkey solution provider for global clients across 20+ countries, TOB will demonstrate its full-range capabilities: End-to-End Production Lines Customized battery manufacturing systems encompassing plant design, equipment selection, installation, commissioning, and staff training - all optimized for budget and output requirements. Pilot & Lab Line Expertise Specialized solutions for R&D facilities featuring adaptive laboratory design, precision equipment configuration, and researcher-oriented technical support. Next-Gen Battery Technologies Live demonstrations of advanced solutions including: - Solid-state battery systems - Sodium-ion battery architectures - Lithium-sulfur battery configurations - Dry electrode processing technologies Custom Equipment Solutions From lab-scale prototypes to mass production systems - modular equipment adaptable to all development stages. Advanced Material Portfolio Comprehensive supply chain support with innovative materials for emerging battery technologies. "Our participation at CIBF 2025 underscores our commitment to driving battery innovation," said Dany Huang. "With over 2,000 global partners and 20 years of technical accumulation, we're ready to empower researchers and manufacturers in their transition to next-generation energy storage solutions." Visit Us at CIBF 2025 Explore our solutions at Booth 13T001, where our technical team will present live equipment demonstrations and discuss customized cooperation opportunities. About TOB NEW ENERGY Headquartered in Xiamen, China, TOB NEW ENERGY specializes in integrated battery manufacturing solutions, serving global enterprises and academic institutions since 2002. With 2000+ overseas clients and strategic partnerships with leading industry players, the company continues to push boundaries in energy storage innovation. Contact: Website: www.tobmachine.com Email: tob.amy@tobmachine.com Tel: +86-18120715609 Address: Tong'an District, Xiamen City, Fujian Province, China

Dear Valued Customers, We would like to inform you that TOB New Energy Technology Co., Ltd. will observe the International Labor Day holiday from May 1st to May 5th, 2024. Regular business operations will resume on Monday, May 6th, 2024. Service Arrangements During the Holiday: Order Processing: Orders placed after April 30th, 4:00 PM (GMT+8) will be processed starting May 6th. Urgent Support: For critical technical issues, please contact our 24/7 Emergency Team at +86-18120715609 or email tob.amy@tobmachine.com. Project Inquiries: Non-urgent requests will be responded to within 1 business day after May 6th. We apologize for any inconvenience this may cause and appreciate your understanding. Thank you for your continued trust in TOB New Energy. Wishing you a peaceful and rejuvenating holiday! TOB New Energy Technology Co., Ltd. Email: tob.amy@tobmachine.com | Tel: +86-18120715609 April 30th, 2025

During the lithium battery coating process, misalignment of the A and B surfaces is a critical yet often overlooked issue that directly impacts battery capacity, safety, and cycle life. This misalignment manifests as deviations in coating areas or uneven thickness between the front and back surfaces, potentially leading to risks such as lithium plating and electrode sheet fracture. This article will analyze the multi-dimensional causes from equipment, process, material, and other aspects, while sharing key improvement measures to enhance battery quality consistency. 1. Main Causes of A&B Surface Misalignment 1.1Equipment Factors Insufficient installation accuracy of backup roller/coating roller: Horizontal deviation, coaxial misalignment, or installation errors lead to coating displacement. Positioning error of the coating head: Inadequate encoder/grating ruler precision or sensor signal drift. Abnormal tension control: Uneven tension during unwinding/spooling causes foil stretching, deformation, or wrinkles. 1.2 Material Factors Uneven ductility: Variations in foil ductility result in loss of control over coating gap. Inadequate surface treatment: Surface oxides affect paste adhesion, indirectly causing positional deviation. 1.3Slurry Factors Excessive viscosity: Poor leveling results in slurry accumulation and misalignment. Significant surface tension differences: Uneven edge shrinkage of A/B side slurries. 1.4Process Parameters Coating speed disparity: Different speeds between the two sides lead to inconsistent leveling rates. Inconsistent drying conditions: Temperature differences in A/B side ovens cause varying substrate shrinkage. 2 Improvement Measures 2.1Equipment Optimization Regularly calibrate coaxiality and horizontal alignment of coating rollers and backup rollers. Replace high-precision encoders and grating rulers to ensure coating head positioning error ≤±0.1mm. Optimize tension control systems (e.g., PID closed-loop control) to maintain substrate tension fluctuation ≤±3%. 2.2Foil Material Control Select foils with consistent ductility (e.g., copper/aluminum foil with uniform tensile strength). Enhance foil surface treatment processes (e.g., plasma cleaning or chemical passivation). 2.3Slurry Adjustment Adjust slurry viscosity to optimal leveling range (anode: 10–12 Pa·s; cathode: 4–5 Pa·s). Add surfactants (e.g., PVP or SDS) to balance surface tension differences between A/B side slurries. 2.4Process Parameter Optimization Ensure A/B side coating speeds are consistent, with speed deviation <0.5 m/min. Implement segmented temperature-controlled drying (low-temperature stage for stress relaxation, high-temperature stage for rapid curing), maintaining temperature difference ≤5℃. 3. Specific Troubleshooting Procedures 3.1Equipment Inspection Use a laser interferometer to detect parallelism between coating rollers and backup rollers (error ≤0.02 mm/m). Check servo motor and sensor signal stability (avoid signal drift exceed...

The determination of low battery capacity (low capacity) for battery cells is based on a straightforward comparison between the post-formation (post-charging/discharging cycle) capacity and the designed capacity value. If the capacity measured after the formation process is lower than the designed value, the first response should be to confirm whether there are errors in the formation process settings (such as discharge current, charging time, cut-off voltage, and formation temperature). ①If the formation step settings are correct, it is necessary to change the testing point and re-perform the formation process on the battery cell to check if there are issues with the formation equipment or channels. ②Assuming no abnormalities are found in the formation data after changing the equipment, then the original equipment is likely problematic. ③If the re-test still shows low capacity, it can be confirmed that the low-capacity issue truly exists. After confirming the existence of low capacity, it is necessary to further determine the frequency and severity of the low-capacity occurrences to grasp the actual situation of low capacity from an overall perspective. This requires a more systematic approach. Before conducting a systematic analysis, it is advisable to first disassemble the re-charged low-capacity battery cells to inspect the interface. If no issues are found, it is likely due to insufficient positive electrode coating weight or inadequate design margin. If there are interface problems, it may be due to other issues in the manufacturing process or design. Next, we will investigate the causes of low capacity from the design end and the process manufacturing end. I. Design End Material system compatibility: In particular, the compatibility between the negative electrode and electrolyte has a significant impact on battery cell capacity. For newly introduced negative electrodes or electrolytes, if repeated tests show that each battery cell experiences lithium plating and low capacity, there is a high likelihood of material mismatch. The reasons for mismatch may include: ①Inadequate density, thickness, or instability of the SEI (Solid Electrolyte Interphase) film formed during formation; ②Possible delamination of the graphite layer caused by PC (propylene carbonate) in the electrolyte; ③Excessively high designed areal density or compaction density, making the battery cell unable to adapt to high-rate charging and discharging. Adequacy of capacity design margin: ①Starting from the gravimetric capacity of the positive electrode material: Due to errors in positive/negative electrode coating, formation cabinet accuracy, and adhesive effects on capacity, a certain capacity margin must be reserved during design. For new materials, accurate assessment of the gravimetric capacity of the positive electrode in the specific system is crucial. The same positive electrode material may not exhibit the same gravimetric capacity when paired with different negative ...

What is COV The COV (Coefficient of Variation) in lithium-ion battery coating is a statistical indicator used to quantify the consistency of the coating process. It is calculated using the formula: COV = (Standard Deviation σ / Mean) × 100%. By eliminating differences in dimensions, this indicator reflects the dispersion degree of the dataset. A lower COV value indicates better coating uniformity. How to Evaluate Coating Quality Using COV Evaluation of Coating Surface Density Consistency The COV directly reflects the degree of fluctuation in coating surface density. For example, a COV of 0.5% for coating surface density indicates that the standard deviation of the data is 0.5% of the mean value. Industry standards are as follows: COV ≤ 0.3%: Extremely high surface density consistency. 0.3% < COV < 0.5%: Current mainstream level. COV > 0.5%: Process optimization is required. This indicator directly impacts cell capacity design. For instance, with a COV of 0.5%, a 3σ corresponds to a fluctuation of 1.5%, and the minimum cell capacity design needs to be set at 98.5% of the mean value. Analysis of AB Surface Coating Uniformity By using in-situ resistance testing methods (such as the BER2500 device), the resistance of the A-side, B-side, and total through-resistance of the electrode are measured respectively, and the COV value of each resistance is calculated. The larger the COV, the more uneven the distribution of the conductive network in the coating. For example, in a double-sided coating process, if there is a significant difference in the COV of AB surface resistance, it may be due to uneven distribution of conductive agents caused by slurry sedimentation or different drying rates, which may further lead to lithium plating or reduced cycle life of the battery. Optimization Directions for Process Parameters Slurry Stability: Changes in slurry viscosity and solid content directly affect the coating COV. It is necessary to ensure that the slurry has no sedimentation and stable fluidity. Drying Control: Excessively high or low temperatures can cause coating cracks or incomplete drying, affecting surface density consistency. Equipment Precision: Slit extrusion coating technology is more suitable for reducing COV due to its closed system and high-precision control. Precautions Sensitivity to Extreme Values: COV is susceptible to outliers. It is necessary to combine data cleaning or supplement other indicators (such as CPK) for comprehensive evaluation. Multidimensional Verification: In addition to surface density, it is recommended to combine COV values of resistance, thickness, and other parameters to comprehensively evaluate coating quality.