A soft pack battery module connection structure

A module connection and pouch battery technology, applied in structural parts, battery pack parts, circuits, etc., can solve the problems of poor laser welding of busbars, increased connection reliability risks, high size sensitivity, etc., to achieve easy control and management The effect of small dependence on process and part dimensional accuracy and widening the selection range

Active Publication Date: 2019-11-08
上海捷新动力电池系统有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The two different materials of the busbar need to be connected together by ultrasonic, brazing and other processes, which increases the connection process of different materials and the risk of connection reliability brought by this process
Moreover, the laser welding process of this kind of bus bar (the connection part is arc-shaped) and the tab (the connection part is the top of the tab) is highly sensitive to size, and has strict requirements on the entire welding size chain, which can easily cause confluence Bad laser welding

Method used

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  • A soft pack battery module connection structure
  • A soft pack battery module connection structure
  • A soft pack battery module connection structure

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0030] like figure 1 , figure 2 and image 3 As shown, a pouch battery module connection structure, including a plurality of stacked battery cells 1, a bus bar 3 connected to the tab 2 of the battery cell 1, and a position between the tab 2 of the battery cell 1 and the bus bar 3 The bus bar support assembly 4, the positive and negative tabs 2 of the battery cell 1 are made of copper-aluminum composite materials, and the positive and negative bus bars 3 corresponding to the positive and negative tabs 2 are all made of the same single conductive material. The conductive material is...

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Abstract

The invention relates to a pouch battery module connection structure, which includes a plurality of stacked battery cells, a bus bar connected to the tabs of the battery cells, and a bus bar support assembly that defines the position between the tabs of the battery cells and the bus bar. The positive and negative tabs of the core are made of copper-aluminum composite material, and the positive and negative bus bars corresponding to the positive and negative tabs are made of the same single conductive material. Compared with the prior art, the invention improves the connection structure between the tab and the bus bar, greatly improves the laser welding quality between the tab and the bus bar, and improves the connection reliability.

Description

technical field [0001] The invention relates to the technical field of battery production, in particular to a soft pack battery module connection structure. Background technique [0002] The battery cells are grouped into modules, mainly to complete the mechanical and electrical connections between the cells. The electrical connection directly affects the performance of the module, so it is more important. The electrical connection between the cells on the module is the tab connection. The connected structural members are generally called bus bars. For pouch batteries, the current connection between the bus bar and tabs on the module is mainly completed by welding, such as laser welding and ultrasonic welding, and laser welding is the most common method. The materials of the busbar connected to the positive and negative tabs are different. Generally, the positive tab busbar is made of aluminum, and the negative tab busbar is made of copper. The two different materials of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/22H01M2/26H01M50/528H01M50/531
CPCH01M50/528H01M50/531Y02E60/10
Inventor 赵群坡樊晓松祁泾平吕勇王兵
Owner 上海捷新动力电池系统有限公司
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