Battery signal acquisition module and battery protection system using same

Abstract

The invention relates to a battery signal acquisition module and a battery protection system using the battery signal acquisition module. The battery signal acquisition module comprises a plurality ofacquisition lines and a acquisition circuit, wherein the acquisition lines are connected with an external battery assembly; the acquisition circuit is connected with the plurality of acquisition line; the acquisition circuit obtains monitoring data of voltage, current or temperature of the battery assembly through the plurality of acquisition lines; the plurality of acquisition lines and the acquisition circuit are arranged on a first flexible circuit board.

Description

technical field [0001] The invention relates to a battery signal acquisition module and a battery protection system (BMS), in particular to a battery signal acquisition module designed based on a flexible circuit board and a battery protection system using the battery signal acquisition module. Background technique [0002] Generally speaking, the battery protection system (BMS) in the prior art is divided into three parts: the main control board, the slave control board, and the signal acquisition harness. The slave control board is installed in the battery box and is divided into two parts: signal acquisition, signal processing and communication. , connected to the battery through the signal acquisition harness, responsible for detecting the battery status, including voltage, temperature, current, remaining power and other information, after simple processing of the collected information, it is transmitted to the main control board through CAN, and then the main control boa...

AI Technical Summary

Problems solved by technology

[0003] However, the battery protection system in the prior art needs to design different wiring harnesses for different battery boxes. The wiring harnesses are bulky and not highly versatile. For battery boxes with a large number of batteries connected in series, a lot of signal acquisition lines are required, and the manufacturing cost will be high. , and it is easy to make corresponding errors

Furthermore, it is difficult to add overcurrent protection devices such as FUSE on the wiring harness, and the connection between the collection wiring harness and the slave control board needs to use a special car connector, which is relatively large in size and occupies the space of the battery box

Depending on the installation position of the slave control board in the battery box, the length of the acquisition wire harness may be very long, and the line impedance will cause a voltage drop, and the length of the connecting wire harness from the battery to the slave control board at different positions will vary greatly. The voltage drop on the wiring harness from the collection point to the collection board will also be different, and the inconsistency of line loss and loss may cause measurement errors

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