Battery cell module and battery

Abstract

A battery cell module provided by the present invention includes a battery cell, a clamping plate having a battery cell installation hole and fixed on the battery cell, a copper sheet and a nickel-plated steel sheet. The copper sheet is laser spot-welded on the nickel-plated steel sheet, and the two electrodes of the cell are connected to the nickel-plated steel sheet by spot welding. The present invention also provides a battery using the battery cell module provided by the present invention. Compared with the small riveting contact area of ​​the prior art and the overcurrent instability caused by poor contact, this solution provides a battery cell module and a battery using the battery cell module. The steel sheet and the copper sheet are welded together, and the laser welding is smooth. The welding can make the entire plane contact area large and reliable, and can effectively ensure the stability of the overcurrent between the battery modules and the requirements for excessive current.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery cell module and a battery. Background technique [0002] With the development of new energy electric vehicles, the requirements for the capacity, volume, cell combination, heat dissipation and fixation of the battery box are getting higher and higher. There must be a more reasonable structure, higher composition density, reasonable structure, and reliable battery installation. modules to meet the requirements of battery box safety performance. [0003] The overcurrent capacity of the battery structure is reflected by the size of the cross-section of the series connection between the pole of the battery cell and the conductive plate such as copper sheet. Many traditional processes are riveting a thick copper plate, and only the riveting point is in contact. The surface is too small to meet the excessive current requirement. And because the internal resistance is too large, the...

AI Technical Summary

Problems solved by technology

[0003] The overcurrent capacity of the battery structure is reflected by the size of the cross-section of the series connection between the pole of the battery cell and the conductive plate such as copper sheet. Many traditional processes are riveting a thick copper plate, and only the riveting point is in contact. The surface is too small to meet the excessive current requirements

And because the internal resistance is too large, the contact points will heat up. After long-term work, there may be poor contact and unstable overcurrent, which will bring certain structural safety hazards to the subsequent battery box.

[0004] In addition, the modules on the existing market are all combined into a single module by means of left and right or upper and lower covers. The weight of the module is heavy, and the heat dissipation is only through holes in the outer shell to dissipate heat. The cooling effect of the surrounding batteries is poor.

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