Assembling process of battery module

Abstract

The invention provides an assembling process of a battery module. The assembling process comprises the steps: cleaning two end plates and a to-be-coated surface of each battery; coating two positive surfaces of each battery and the inner surfaces of the two end plates; sequentially overlapping the batteries to form a battery pack; respectively arranging the two end plates at two ends of the battery pack in an overlapping direction, respectively arranging two side plates at two sides of the battery pack; pre-tightening the two end plates by using an assembling clamp; welding the end plates at the two ends of the battery pack in the overlapping direction with the side plates at the two sides of the battery pack so as to form a surrounding frame; coating the inner surface of a bottom plate; assembling the bottom plate with the coated inner surface; installing a connecting sheet so that the batteries in the battery pack are connected in series and / or in parallel; assembling a cover plate in the surrounding frame, wherein glue coated on the two positive surfaces of the batteries and the inner surfaces of the two end plates are glue with an adhering performance as a main performance, and glue coated on the inner surface of the bottom plate is glue with a heat conducting performance as a main performance. Therefore, the shock resistance stability, the electric connection performance, the safety and the reliability of the battery module are improved.

Description

technical field [0001] The invention relates to the battery field, in particular to an assembly process of a battery module. Background technique [0002] The power battery pack consists of multiple batteries stacked one by one, and two brackets are respectively placed at both ends of the stacked battery pack and fastened back and forth by bolts. Although the battery pack with this structure and assembly method is fastened at the initial stage, the thickness of the battery has a certain difference due to the expansion and contraction of charging and discharging during use, and the clamping force of the front and rear brackets of the battery pack will fluctuate. In addition, the connection strength and structure are affected due to vibration and thermal expansion and contraction, and individual batteries will move up and down, resulting in increased resistance of the conductive structure and even structural failure. [0003] At present, screws are used between the batteries ...

AI Technical Summary

Problems solved by technology

[0003] At present, screws are used between the batteries to connect the connecting piece and the battery together. During the assembly process of this solution, because the battery poles are usually made of aluminum or copper, the screws are easily slipped due to excessive force, so the torque strength of the screws is not high enough.

During use, the connection strength and structure will be affected due to vibration and thermal expansion and contraction, which will lead to an increase in the connection resistance and a rise in the temperature of the connection, which will lead to a series of safety and reliability problems.

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