Test Principle:
The essence of lithium battery aging is a performance degradation process of the chemical system under cyclic charge-discharge or high-temperature environments, including electrode material structure damage, electrolyte decomposition, and SEI film thickening. Aging tests accelerate these reactions to shorten the evaluation cycle. For example, high-temperature environments (e.g., 55℃-85℃) can speed up side reaction rates, making weeks of testing equivalent to years of actual use.
After the assembly of lithium battery packs, aging tests must be conducted using aging chambers before shipment. This is a core link to ensure the safety, reliability, and performance stability of battery packs. Through test items such as cycle life, high/low temperature resistance, storage, and simulated comprehensive environments, potential defects are exposed in advance to eliminate defective products, while stabilizing the overall performance of battery packs.
Lithium battery packs consist of multiple components including cells, BMS/protection boards, connectors, housings, and auxiliary materials. Invisible defects may occur during the manufacturing process. These hidden hazards are difficult to detect initially but may quickly lead to failures during product application. The key purpose of aging tests is to expose all defects before battery pack shipment:
At the cell level: Latent issues such as micro-shorts, separator damage, and active material shedding may exist. Although voltage and capacity perform normally in initial tests, they are prone to capacity plummeting, voltage abnormalities, and even leakage or swelling under cyclic charge-discharge or high-temperature conditions.
At the structural and connection level: Poor welding, loose connections, or excessive contact resistance may cause interface melting and local overheating of battery packs due to accumulated heat during aging. In severe cases, local ablation or thermal runaway may occur.
For BMS protection boards: Faults such as parameter deviations, balancing abnormalities, or communication interruptions may be triggered by abnormal charge-discharge during aging cycles.
Through multi-condition composite tests including high temperature, multi-cycle charge-discharge, and standing, the aging process amplifies these early failure risks, enabling precise screening of defective products and preventing unsafe or underperforming products from entering the market.
Lithium battery packs often have unstable performance in the initial stage. In particular, the SEI film of cells may not be fully formed, and slight performance differences between cells are inevitable after pack assembly. The aging process effectively improves performance:
Even after pre-screening, multiple cells in a pack may have subtle differences in capacity and internal resistance. During aging, cells with weaker performance show faster capacity degradation through charge-discharge cycles, facilitating further calibration via the BMS balancing function. This reduces the risk of the entire battery pack being compromised by a single cell in subsequent use.
Lithium battery packs must adapt to diverse application environments. Aging tests verify their adaptability under different conditions by simulating actual scenarios such as high/low temperatures, continuous operation, and comprehensive application environments:
For automotive batteries (requiring high/low temperature resistance): Aging chambers perform high/low temperature cycles to test charge-discharge efficiency, capacity retention rate, and BMS adaptability (e.g., whether low-temperature protection is falsely triggered) under extreme temperatures.
For energy storage batteries (needing long-term voltage stability and self-discharge control under float charging): Aging tests ensure no excessive power loss or overcharging occurs in practical use.
Both international and domestic standards such as IEC 62133, UN38.3, and GB/T 31467.3 explicitly require lithium battery packs to pass aging tests before leaving the factory. This is not only a mandatory standard requirement but also a key measure for enterprises to assume product quality responsibility and ensure user safety. Over 20 years of practice by Guihang New Energy has proven that battery packs undergoing sufficient aging tests have an early failure rate reduced by more than 99%, significantly helping customers improve product experience/application and brand reputation.
In summary, aging chamber testing is the "final physical examination" for lithium battery packs before shipment. Although this link requires an additional 1–3 days of investment, it fundamentally avoids terminal failures and safety risks, making it an indispensable quality control and core step in the manufacturing system of the lithium battery industry.
Test Principle:
The essence of lithium battery aging is a performance degradation process of the chemical system under cyclic charge-discharge or high-temperature environments, including electrode material structure damage, electrolyte decomposition, and SEI film thickening. Aging tests accelerate these reactions to shorten the evaluation cycle. For example, high-temperature environments (e.g., 55℃-85℃) can speed up side reaction rates, making weeks of testing equivalent to years of actual use.
After the assembly of lithium battery packs, aging tests must be conducted using aging chambers before shipment. This is a core link to ensure the safety, reliability, and performance stability of battery packs. Through test items such as cycle life, high/low temperature resistance, storage, and simulated comprehensive environments, potential defects are exposed in advance to eliminate defective products, while stabilizing the overall performance of battery packs.
Lithium battery packs consist of multiple components including cells, BMS/protection boards, connectors, housings, and auxiliary materials. Invisible defects may occur during the manufacturing process. These hidden hazards are difficult to detect initially but may quickly lead to failures during product application. The key purpose of aging tests is to expose all defects before battery pack shipment:
At the cell level: Latent issues such as micro-shorts, separator damage, and active material shedding may exist. Although voltage and capacity perform normally in initial tests, they are prone to capacity plummeting, voltage abnormalities, and even leakage or swelling under cyclic charge-discharge or high-temperature conditions.
At the structural and connection level: Poor welding, loose connections, or excessive contact resistance may cause interface melting and local overheating of battery packs due to accumulated heat during aging. In severe cases, local ablation or thermal runaway may occur.
For BMS protection boards: Faults such as parameter deviations, balancing abnormalities, or communication interruptions may be triggered by abnormal charge-discharge during aging cycles.
Through multi-condition composite tests including high temperature, multi-cycle charge-discharge, and standing, the aging process amplifies these early failure risks, enabling precise screening of defective products and preventing unsafe or underperforming products from entering the market.
Lithium battery packs often have unstable performance in the initial stage. In particular, the SEI film of cells may not be fully formed, and slight performance differences between cells are inevitable after pack assembly. The aging process effectively improves performance:
Even after pre-screening, multiple cells in a pack may have subtle differences in capacity and internal resistance. During aging, cells with weaker performance show faster capacity degradation through charge-discharge cycles, facilitating further calibration via the BMS balancing function. This reduces the risk of the entire battery pack being compromised by a single cell in subsequent use.
Lithium battery packs must adapt to diverse application environments. Aging tests verify their adaptability under different conditions by simulating actual scenarios such as high/low temperatures, continuous operation, and comprehensive application environments:
For automotive batteries (requiring high/low temperature resistance): Aging chambers perform high/low temperature cycles to test charge-discharge efficiency, capacity retention rate, and BMS adaptability (e.g., whether low-temperature protection is falsely triggered) under extreme temperatures.
For energy storage batteries (needing long-term voltage stability and self-discharge control under float charging): Aging tests ensure no excessive power loss or overcharging occurs in practical use.
Both international and domestic standards such as IEC 62133, UN38.3, and GB/T 31467.3 explicitly require lithium battery packs to pass aging tests before leaving the factory. This is not only a mandatory standard requirement but also a key measure for enterprises to assume product quality responsibility and ensure user safety. Over 20 years of practice by Guihang New Energy has proven that battery packs undergoing sufficient aging tests have an early failure rate reduced by more than 99%, significantly helping customers improve product experience/application and brand reputation.
In summary, aging chamber testing is the "final physical examination" for lithium battery packs before shipment. Although this link requires an additional 1–3 days of investment, it fundamentally avoids terminal failures and safety risks, making it an indispensable quality control and core step in the manufacturing system of the lithium battery industry.
