Power battery top cover component, power battery and battery module

Abstract

The embodiment of the invention provides a power battery top cover component, a power battery and a battery module. The power battery top cover component comprises a top cover piece, a first electrode terminal and a second electrode terminal; the first electrode terminal comprises a first pole rod and a first terminal plate; the first terminal plate comprises a first connection plate and a first conductive plate; the first conductive plate is exposed out of one side of the first connection plate, which is away from the top cover piece; the first conductive plate is connected with the first pole rod and the first connection plate; and the second electrode terminal is arranged at the other end of the top cover piece along a length direction and is arranged in a mode of being insulated from the first electrode terminal. According to the power battery top cover component provided by the embodiment of the invention, the structure of the first electrode terminal is optimized, so that a connecting piece made of a single material is well welded with the first electrode terminal and the second electrode terminal; and furthermore, in a case that the power batteries are arranged along a thickness direction when being connected in series, first extension parts and the second electrode terminals of two adjacent power battery monomers can be positioned on the same straight line.

Description

technical field [0001] This application designs the field of energy storage devices, and in particular relates to a top cover assembly of a power battery, a power battery and a battery module. Background technique [0002] At present, the battery module with a series structure uses a connecting piece to connect the positive and negative terminals of the battery, and laser welding is used between the connecting piece and the positive and negative terminals to ensure good conductivity and connection reliability. At present, the material of the negative terminal of the battery is usually copper, and the material of the positive terminal of the battery is usually aluminum. In order to realize laser welding and ensure the welding strength, the connecting piece welded to the negative terminal is required to be copper, and the connecting piece welded to the positive terminal is required to be copper. It is required to be made of aluminum; however, it is difficult for a connecting p...

AI Technical Summary

Problems solved by technology

When the connecting piece 801' is made into a zigzag shape, the utilization rate of raw materials will be low, the material of the connecting piece 801' will be wasted, and the zigzag connecting piece 801' cannot be applied to the situation where batteries are connected in parallel

At the same time, since the aluminum connecting plate 130' extends toward the direction of the positive terminal 200', it will occupy the space for setting the module wiring harness board (the module wiring harness board is used to collect voltage, temperature, etc., and is generally located at the positive terminal 200' and the negative terminal 200'). between 100')

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