Battery protection device and method, and battery system

Abstract

The invention provides a battery protection device and method, and a battery system, and relates to the technical field of batteries. The battery protection device comprises an active fuse module, anisolation power supply module and a processor; the active fuse module is connected in a battery circuit; and the processor controls the isolation power supply module to supply power to the active fusemodule according to the battery system sampling information and / or the battery protection triggering information, so that the active fuse module disconnects the battery circuit. According to the battery protection device and method, and the battery system disclosed by the invention, the function of actively disconnecting the active fuse module can be realized by providing the voltage through theisolation part under the condition that the battery circuit needs to be disconnected, the voltage and the current with different requirements can be adjustably controlled to be output, and the plurality of active fuse modules can be triggered to be disconnected; and according to the invention, misoperation can be reduced, the safety and reliability of the battery can be improved, and the personalsafety of a user can be better protected.

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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