Battery protection device, battery system and protection method

Abstract

The disclosure provides a battery protection device, a battery system and a protection method, relating to the field of battery technology, wherein the battery protection device includes: an active fuse module, an isolated power supply module and a processor; the active fuse module is connected in the battery circuit; the processor Control the isolated power supply module to supply power to the active fuse module according to the battery system sampling information and / or battery protection trigger information, so that the active fuse module disconnects the battery circuit. The battery protection device, battery system and protection method of the present disclosure can provide voltage through the isolation component to realize the function of actively disconnecting the active fuse module when the battery circuit needs to be disconnected; the adjustable control output voltage and current of different requirements , can trigger multiple active fuse modules to be disconnected; can reduce misoperations, improve battery safety and reliability, and better protect users' personal safety.

Description

technical field [0001] The present disclosure relates to the technical field of batteries, and in particular to a battery protection device, a battery system and a protection method. Background technique [0002] The replacement of fuel vehicles by electric vehicles has become the development trend of the automobile industry. Due to the high power of electric vehicle motors, the battery packs currently used are usually high-voltage low-current or low-voltage high-current battery packs. The voltage of the battery pack usually exceeds the safe voltage, so the battery pack needs to be separated from the outside. At present, controllable switching devices (such as relays, IGBTs (Insulated Gate Bipolar Transistors, insulated gate bipolar transistors), etc.) are usually used as devices to control high-voltage on-off under normal circumstances, and fuses are connected in series in the high-voltage circuit as emergency conditions. disconnect device. The traditional solution relies...

AI Technical Summary

Problems solved by technology

The traditional solution relies on insurance and switching devices (such as relays, IGBTs, etc.), but usually only one fuse is set on the positive or negative pole in the high-voltage system. If the relay fails to disconnect, even if the fuse blows, the other pole of the high voltage will exists output

For example, in the case of a vehicle collision, a large current will often flow through the relay. At this time, the relay is forcibly disconnected, which will cause damage to the relay and adhesion, resulting in high voltage that cannot be disconnected.

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