Soft-package power battery module

Abstract

The invention relates to the field of a battery, in particular to a soft-package power battery module. The battery module comprises tray end covers, battery cores, single trays, tray side connection plates, battery core conductive connection sheets and tray connection buckles, wherein the plurality of single trays and the tray end covers at the two ends are assembled to form a tray main body by the tray side connection plates and the tray connection buckles, the battery cores are fixedly embedded between the tray end covers and the single trays as well as between every two adjacent single trays, the tray side connection plates are clamped and connected onto the side surface after the tray end covers and the single trays are assembled, the battery core conductive connection sheets comprise an upper layer and a lower layer, and electrodes of all battery cores are connected together by a plurality of bolts. The battery module is simple in structure and is convenient to install, and the subsequent maintenance and repair of battery modules are facilitated; and the key lies that the battery modules can be randomly combined without limitation of quantity in series / parallel connection, the design cost and the die cost are greatly reduced, product serialization and standardization are promoted, pressure can be timely relieved when the battery encounters an accident, and no potential risk is generated.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a soft pack power battery module. technical background [0002] Due to the advantages of high energy density, good safety, light weight, and long cycle life, lithium-ion power batteries have been widely used in energy storage systems. Especially in the field of electric vehicle energy storage, lithium-ion power batteries have become the preferred battery type. Due to the low voltage and small capacity of most lithium-ion power battery cells at present, they cannot meet the power demand of the whole vehicle. Therefore, it is necessary to connect multiple single cells in series and parallel to form a battery module that can meet the power demand of the whole vehicle. [0003] The power battery module is widely used in pure power or hybrid vehicles. The module reacts violently inside the battery under some specific external forces or special conditions (such as short circuit, extrusion, ov...

AI Technical Summary

Problems solved by technology

[0003] The power battery module is widely used in pure power or hybrid vehicles. The module reacts violently inside the battery under some specific external forces or special conditions (such as short circuit, extrusion, overcharge, overdischarge), causing the internal pressure of the battery to increase. , the temperature rises, and if it is serious, it will cause fire and explosion, which poses a great threat to the safety of electric vehicles

[0004] The existing soft package power battery assembly method mainly has the following disadvantages: 1. The assembly process is cumbersome, there are many connectors, the assembly and maintenance are very laborious and the cost is high; 2. Limited by the fixed mold, only a fixed number can be processed. 3. Due to structural reasons, the pressure cannot be released in time when an accident occurs in the battery, and there are potential safety hazards

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