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It is an intelligent protection board scheme specially designed for 7 series battery packs of power tools, medical batteries and other products. It is suitable for lithium batteries with different chemical properties, such as lithium ion, lithium polymer, lithium iron phosphate, etc. The protection board has strong load carrying capacity and the maximum continuous discharge current can reach 150A.
● 4 cell series protection
● Various protection functions for charging and discharging
● Discharge over current, short circuit protection functional processes of hardware
● Over voltage, under voltage, temperature and overload protection function processing of software
● Accurate SOC calculation with automatic SOC learning function
● UART communication（External Bluetooth function）
● Hardware discharge over-current, short-circuit protection function processing

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Discharge current	100A	200A
Discharge overcurrent protection value	7~13s
Internal resistance of main circuit conduction	10m
Charging current (same port)	100A	200A
Charging current protection	None
Charging voltage	Ternary battery string number X 4.2V	LiFePO4 battery strings X 3.6V

Overcharge protection	Equalization voltage
Overcharge protection: Ternary 4.25±0.03V LiFe 3.75±0.05V	Turn-on voltage: Ternary 4.0V±0.03V LiFe 3.30±0.03 V
Protection delay time: 2000 mS	Open differential pressure: 15 mV
Recovery voltage: Ternary 4.15±0.05V LiFe 3.60±0.05V	Equalization current: 4200mA

Over-discharge voltage protection	Discharge overcurrent protection
Protection voltage: Ternary 2.8±0.1 V LiFe: 2.5±0.1 V	Overcurrent protection value: 7-13s
Protection delay time: 2000 mS	Recovery condition: 32s delayed automatic recovery
Recovery voltage: Ternary 3.0±0.1V LiFe: charge recovery

Short circuit protection	Temperature control protection
Detection delay time: 400-800 uS	Discharge high temperature protection: 90±5℃
Unload condition: disconnect the load and delay 5s to recover	Discharge high temperature lifting temperature: 70±5℃

Self-consumption of electricity	Operating temperature
Working power consumption: ≤20 mA	Temperature range: -30℃ / +75℃
Hibernation power consumption: ≤ 3 mA

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