Lithium battery PACK circuit overcurrent adaptive protection device and method

The invention discloses a lithium battery PACK circuit overcurrent adaptive protection device, which comprises a sensor used for measuring the temperature and current signals of a PACK circuit; the laser heater is used for heating the welding point; the detection control circuit is respectively connected with the sensor and the laser heater and is used for acquiring a signal of the PACK circuit and sending a control signal to control the start and stop of the laser heater; the travel limit switch is connected with the detection control circuit and is used for closing the laser heater; the spring is used for controlling the travel limit switch to be switched off; and the lithium battery pack is used for supplying power to the PACK circuit. The protection device can adjust the corresponding time delay according to the magnitude of the overcurrent protection current, thereby effectively enhancing the stability and safety of the product. 本发明公开了一种锂电池PACK电路过流自适应保护装置，包括：传感器，用于测量PACK电路的温度和电流信号；激光加热器，用于加热焊接点；检测控制电路，分别