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In addition, the use of lithium manganese oxide material can significantly reduce costs.

To improve the performance of existing safety control technologies, the first step is to improve the safety performance of lithium-ion battery cells, which is particularly important for large capacity batteries. Choose a diaphragm with good thermal shutdown performance. The purpose of the diaphragm is to isolate the positive and negative poles of the battery while allowing the passage of lithium ions. When the temperature rises, it is closed before the diaphragm melts, causing the internal resistance to rise to 2000 ohms and stopping the internal reaction.

When the internal pressure or temperature reaches the preset standard, the explosion-proof valve will open and begin to relieve pressure to prevent excessive accumulation of internal gas and deformation, ultimately causing the shell to burst.

Improving control sensitivity, selecting more sensitive control parameters, and adopting joint control with multiple parameters (this is particularly important for large capacity batteries). A large capacity lithium-ion battery pack is composed of multiple battery cells in series/parallel. For example, if the voltage of a laptop is above 10V and the capacity is large, usually 3-4 single batteries are connected in series to meet the voltage requirements. Then, 2-3 battery packs in series are connected in parallel to ensure a larger capacity.

The large capacity battery pack itself must be equipped with relatively complete protection functions, and two types of circuit board modules should also be considered: the ProtectionBoardPCB module and the SmartBatteryGaugeBoard module. The complete battery protection design includes: first level protection IC (to prevent overcharging, discharging, and short circuit of the battery), second level protection IC (to prevent second overvoltage), fuses, LED indicators, temperature regulation, and other components.

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