Protection circuit of battery module

A protection circuit of a battery module, including:

• a first master microcontroller;
• a first slave microcontroller connected to the first master microcontroller;
• a charging path switch;
• and
• a first switch controller connected to the first master microcontroller, the first slave microcontroller, and the charging path switch;
• wherein when the first master microcontroller periodically sends a first pulse signal to the first slave microcontroller, the first master microcontroller enables the first switch controller, and then the first switch controller enabled is used to control the turning on or off of the charging path switch;
• if the first slave microcontroller doesn't receive the first pulse signal, the first slave microcontroller disables the first switch controller;
• wherein the battery module includes a battery unit having a plurality of battery cells, the protection circuit further includes a first positive electrode line, a second positive electrode line, and a negative electrode line;
• the first positive electrode line is connected between an inner positive electrode of the battery unit and a first outer positive electrode of the battery module, the second positive electrode line is connected between the inner positive electrode of the battery unit and a second outer positive electrode of the battery module, the negative electrode line is connected between an inner negative electrode of the battery unit and an outer negative electrode of the battery module, the charging path switch is configured on the first positive electrode line, and the discharging path switch is configured on the second positive electrode line.