Battery cut-off device and battery pack system

Abstract

The invention discloses a battery cut-off device and a battery pack system, and belongs to the technical field of vehicles. The battery cut-off device comprises a shell assembly, a cover body, a cut-off control unit BDU and a battery control system BMS. The shell assembly is provided with a containing chamber and a first through hole formed in the side wall of the shell assembly; the cover body isfixedly connected to the shell assembly, and a containing groove is formed between the cover body and the shell assembly; the cut-off control unit BDU is positioned in the containing chamber; the battery control system BMS comprises a main control unit, a slave control unit, a first wire harness, a second wire harness and a third wire harness, the main control unit is located in the containing chamber, the slave control unit is fixed in the containing groove, and the main control unit is electrically connected with the BDU through the first wire harness, electrically connected with the slavecontrol unit through the second wire harness penetrating through the first through hole, and electrically connected with the communication end of a vehicle through the third wire harness; and the battery cut-off device and the battery pack system provided by the invention have the advantages that the size is smaller, the occupied space is smaller, and the internal resistance is smaller.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a battery disconnecting device and a battery pack system. Background technique [0002] Currently, a battery pack system is installed in a vehicle to provide electric energy for electrical equipment of the vehicle. A battery pack system usually consists of a battery module, a high voltage disconnect control unit (battery disconnect unit, BDU) and a battery management system (battery management system, BMS). [0003] In the prior art, most of the BDU and BMS in the battery pack system are arranged in a separate structure design, and the two are assembled separately and then connected through a wire harness. Among them, the BMS and BDU are housed in two boxes respectively. The two boxes are spaced up and down or left and right, and in order to ensure the normal operation of the components in the BDU, a gap needs to be reserved between the components, and the space required for t...

AI Technical Summary

Problems solved by technology

The two boxes are spaced up and down or left and right, and in order to ensure the normal operation of the components in the BDU, a gap needs to be reserved between the components, and the space required for the wiring harness needs to be reserved in the box containing the BDU. As a result, the box housing the BDU has a large volume. Similarly, the box housing the BMS also needs to occupy a large space, and there are components in the BDU that need to be electrically connected to the BMS. Therefore, two Longer wiring harnesses are connected between the boxes, resulting in a higher resistance for the battery pack system

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