Lithium ion batteries have the advantages of large capacity, high specific energy, good cycle life and no memory effect. Lithium-ion batteries are developing rapidly, and their capacity, as the most critical performance indicator, has attracted researchers' attention.

Correspondingly, lithium battery PACK is continuously developing towards large capacity, fast charging, long life and high safety, which also puts forward new requirements for the technology in its manufacturing process.

Lithium ion battery PACK is mainly used to conduct electrical performance test after the cells are screened, configured, packaged and assembled, so as to determine whether the capacity and pressure difference are qualified products.

Battery series-parallel monomer is the consistency between need special consideration in the battery PACK, only have good capacity, charged state, such as internal resistance, self-discharge consistency can be achieved to play and release, battery capacity if bad consistency can seriously affect the whole battery performance, even cause of charging or discharging that they cause safe hidden trouble. However, a good collocation scheme is an effective way to improve monomer consistency.

Lithium ion batteries are subject to the influence of the ambient temperature, the temperature is too high or too low will have an impact on the battery capacity. The cycle life of the battery may be affected if it is operated at high temperature for a long time, while the capacity of the battery may be limited if the temperature is too low.

The discharge rate reflects the battery's large current charge-discharge capacity. The multiplier is too small and the charge-discharge speed is too slow, which affects the test efficiency. If the rate is too large, the capacity will be reduced due to the polarization effect and thermal effect of the battery, so it is necessary to choose the appropriate charging and discharging rate.

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