Flexible connecting board for power battery and machining method for soft connecting board

Abstract

The invention provides a flexible connecting board for a power battery and a machining method for the flexible connecting board. The metal foil of the flexible connecting board adopts special-shaped metal foil; the welding strength of a welding region is the same as that of the base material of the special-shaped metal foil; a non-welding region is formed by applying force to a substrate through special stainless steel; the machining method comprises the steps of enabling multiple layers of special-shaped metal foils to be laminated in vacuum welding equipment to be welded to form the welding region; punching the welding region to form connecting holes; and applying force to the laminated multiple layers of special-shaped metal foils through the special stainless steel to form the non-welding region. Compared with the prior art, the flexible connecting board for the power battery and the machining method for the flexible connecting board provided by the invention can strengthen the connection reliability of the power battery, improve the safety of the single power batteries and modules in series connection and parallel connection, and save the connecting space.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a flexible connection plate for a power battery and a processing method thereof. Background technique [0002] The power battery is an important part of the new energy battery, and the connection method of the battery is an important part of the power battery. The connection of the battery is used to derive the current. There are two disadvantages of the full hard connection plate used in the connection of power batteries and modules of new energy vehicles. One is that the welding between the full hard connection plate and the single battery or battery module is not effective during driving. Due to the impact of continuous vibration, the welding position is continuously stressed, and there is a risk of welding failure, resulting in abnormal battery combination. Second, in the assembly process of large-scale battery cells and battery modules, because the consistency of the power...

AI Technical Summary

Problems solved by technology

There are two disadvantages of the full hard connection plate used in the connection of power batteries and modules of new energy vehicles. One is that the welding between the full hard connection plate and the single battery or battery module is not effective during driving. Due to the continuous vibration, the welding position is continuously stressed, and there is a risk of welding failure, resulting in abnormal battery combination

Second, in the assembly process of large-scale battery cells and battery modules, because the consistency of the power battery cells has a certain range of tolerances, there are offsets caused by the original positioning holes of the full hard connection plate when assembling the battery modules. Single cells or battery modules that need to be connected, thus affecting the automated production of battery modules

At the same time, it will cause the battery cell or battery module to be separated from the entire battery system, resulting in insufficient voltage of the battery system, or even an accidental short circuit, triggering a safety accident

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