Integrated battery electric control system and lithium battery pack containing the electric control system

Abstract

This application relates to an integrated battery electric control system and a lithium battery pack containing the electric control system. The printed circuit board assembly of the electric control system is integrated with a BMS controller, a total positive switching semiconductor device, a total negative switching Semiconductor devices, heat dissipation components, fuses, shunts; the total positive switching semiconductor devices and the total negative switching semiconductor devices are arranged in the main power supply circuit of the battery current output end, and the heat dissipation component dissipates heat to the total positive and total negative switching semiconductor devices ; The fuse includes two copper bars and a whole fuse or a plurality of fuses arranged between the two copper bars; the shunt is connected with the BMS controller to detect the current in the circuit. The new solution highly integrates all electrical components, reduces volume, reduces weight, unifies standardized interface design, saves wiring harness and connectors, saves production man-hours, improves work efficiency, saves costs, facilitates large-scale production, and has a huge market Application prospect.

Description

technical field [0001] The invention relates to the field of battery control, in particular to an integrated battery pack control device in a lithium battery pack and a lithium battery pack integrated with the control device. Background technique [0002] New energy vehicles are developing in the direction of electrification, intelligence, light weight, and integration. Improving the safety and cruising range of passenger vehicles is the direction of continuous improvement of new energy vehicles. The power lithium battery of an electric vehicle is the core component of the vehicle. The high-voltage electrical system includes many electrical components such as battery controllers, high-voltage fuses, high-voltage contactors, pre-charging resistors, and copper wiring harnesses. Heavy, many connection points, scattered layout, poor unified versatility, high cost and low efficiency. These technical bottlenecks restrict the development of new energy vehicles. [0003] figure 1...

AI Technical Summary

Problems solved by technology

[0003] figure 1 It is the internal structure of a traditional battery pack in the prior art, including a battery box (1) and a lithium battery pack (2) as well as electrical components, the electrical components including mechanical contactor I (5), mechanical contactor II (6), Mechanical contactor III (8), pre-charging resistor (7), Hall current sensor (3), fuse I (4), BMS controller (9), explosion-proof device (13), total positive connector (10 ), total negative connector (11), external power connector (12), each electrical component is scattered in the battery box (1) of the battery pack, and each electrical component has a large volume and high cost , cumbersome installation and connection; in addition, the traditional fuse installation method is to use screws to fix the battery box, which is relatively large in size, and some need to be equipped with accessories such as insulating bases. The structure is complex and the installation is cumbersome. The cost is high; in addition, in the traditional battery charging circuit, in order to protect the electronic components in the box from being damaged by high current impact, mechanical contact relay components are often used to ensure the long-term stable operation of the battery pack during the charging cycle , however, the mechanical contact relay components are expensive, the production cost is relatively high, and due to the large volume of the mechanical contact relay components, it does not meet the needs of miniaturization of the electronic control system

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