Battery module

Abstract

The invention relates to a battery module. The battery module comprises welding parts which are formed because electrode terminals extend upward and comprise welding faces in the direction perpendicular to the battery module. Spot laser welding is performed on the welding parts with top-hat laser beams or Gaussian laser beams in a lap welding manner. The battery module also comprises swelling partitions. Therefore, on the condition of swelling which causes volume increase because of the internal problem of battery units, the swelling positions can be adjusted for causing short circuit of the electrode terminals, so that the electric connection can be broken and the stability of the battery units can be improved.

Description

technical field [0001] The present invention relates to a battery module, and more particularly, to a battery module capable of improving the stability of a battery cell by short-circuiting an electrode terminal and disconnecting an electrical connection when the volume increases due to a problem inside the battery cell. Background technique [0002] In general, secondary batteries are different from primary batteries in that secondary batteries can be charged and discharged, and are suitable for use in various fields such as digital cameras, mobile phones, notebook computers, and hybrid vehicles, and various researches are ongoing. Examples of the secondary battery include a nickel-cadmium battery, a metal hydride nickel battery, a nickel-hydrogen battery, a lithium secondary battery, and the like. [0003] Among such secondary batteries, various studies have been conducted on lithium secondary batteries particularly having high energy density and discharge voltage, and the...

AI Technical Summary

Problems solved by technology

However, since the damaged part of the battery cell is irregular, this method may cause the internal electrolyte to leak to the outside through the damaged part, causing problems

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