Connecting structure and connecting method of lithium battery pole lugs and battery shell

A technology of battery casing and connection method, applied in the direction of batteries, structural parts, battery pack components, etc., can solve the problems of connection that cannot be disconnected, cannot be solved, and poor contact, so as to avoid connection uncertainty. Effect

Inactive Publication Date: 2015-12-16
HIGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, ultrasonic welding, laser welding, and resistance hot-melt welding can fuse the tabs and the terminal metal (also called "poles") on the shell, but for batteries with multiple tabs, the folds and gaps between the tabs problem not solved
There are other problems in riveting and bolt connection, including poor contact caused by metal stress, electrolyte inclusion between tabs, local heating, etc., resulting in reduced battery life
Moreover, in the event of a short circuit or thermal runaway, it cannot play the role of disconnecting the connection to prevent thermal runaway

Method used

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  • Connecting structure and connecting method of lithium battery pole lugs and battery shell
  • Connecting structure and connecting method of lithium battery pole lugs and battery shell
  • Connecting structure and connecting method of lithium battery pole lugs and battery shell

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Embodiment Construction

[0023] refer to figure 1 and image 3 As shown, in this embodiment, conductive glue is used to glue and connect the tab 2 provided on the cell body 1 with the pole 3 provided on the battery casing, thereby completing the electrical connection between the tab of the lithium battery and the battery casing, and Ultrasonic welding, laser welding, resistance hot-melt welding, riveting, bolting and other connection methods that have many defects in traditional technology are not used.

[0024] Generally, there are many tabs 2 on the battery core body 1, and these tabs 2 need to be connected to the corresponding poles 3 on the battery case during assembly. Generally, multiple tabs should be connected to one pole. Therefore, in this example, several tabs 2 of the same group are first bonded together with conductive adhesive 8, and then the group of tabs 2 bonded together are bonded and connected to corresponding poles 3 as a whole by using conductive adhesive. Instead of connecting ...

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PUM

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Abstract

The invention discloses a connecting structure and connecting method of lithium battery pole lugs and a battery shell. The pole lugs arranged on a battery body are bonded with pole columns arranged on the battery shell through conducting adhesives. According to the connecting structure and connecting method of the lithium battery pole lugs and the battery shell, both the pole lugs can be reliably connected to the cathode and the anode of the shell, and a safety protection function can be achieved by disconnecting a pole piece out of control with the exterior of the battery on the thermal runaway condition.

Description

technical field [0001] The invention relates to a connection structure between a lithium battery tab and a battery casing, and belongs to the technical field of lithium batteries. Background technique [0002] In recent years, due to the characteristics of green, environmental protection, high energy, and low carbon, lithium-ion batteries have attracted people's attention when traditional energy sources such as petroleum and coal are becoming less and less. The proportion of electric buses is increasing in some cities, and electric family vehicles are gradually being promoted. The lithium batteries used in these vehicles are called power batteries. The tab is an important part of the battery, used to connect the battery pole piece and the shell. In the prior art, the connection between the lug and the shell mainly includes: ultrasonic welding, laser welding, resistance hot-melt welding, riveting, bolting and the like. Among them, ultrasonic welding, laser welding, and resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M2/34H01M50/531H01M50/543H01M50/572
CPCH01M2200/10H01M50/581H01M50/531Y02E60/10
Inventor 王世强方兰兰朱乐凯李竞克杜卫斌张卫林
Owner HIGER
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