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Soft pack battery module with non-welded tab connection structure and connection method

A soft-pack battery and connection structure technology, applied in battery pack parts, batteries, structural parts, etc., can solve the problems of inconvenient disassembly and maintenance of lithium battery modules, increasing the weight of lithium battery modules, and cumbersome production processes, etc. Improve assembly efficiency and enterprise efficiency, improve connection stability, and facilitate the production and operation process.

Active Publication Date: 2022-03-08
置富电子技术(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium battery connected by bolts is easy to cause short circuit, and requires a large number of bolts, which greatly increases the weight of the lithium battery module; the lithium battery module connected by welding, the high temperature generated during the welding process is easy to cause Components with a low melting point are deformed by heat, because they are fixed by welding, which makes it extremely inconvenient to disassemble and maintain the lithium battery module; using tin soldering process requires high-power equipment such as tin furnaces, which wastes more energy, and the production process is more cumbersome

Method used

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  • Soft pack battery module with non-welded tab connection structure and connection method
  • Soft pack battery module with non-welded tab connection structure and connection method
  • Soft pack battery module with non-welded tab connection structure and connection method

Examples

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Effect test

Embodiment 1

[0030] like Figure 1-4 As shown, a pouch battery module with a non-welded tab connection structure includes a battery frame 1, 12 battery cells stacked side by side in the battery frame 1, and four bus bars arranged on the battery frame 1. 4. A connection member 3 is provided between a tab of the battery cell and a corresponding bus bar 4, and the connection member 3 includes a first connection piece 31, a second connection piece 32 and a third connection piece 33 connected in sequence, and the third connection piece 3 The connecting piece 33 is fixedly connected to the bus bar 4, and the tabs are sandwiched between the first connecting piece 31 and the second connecting piece 32. The first connecting piece 31 is provided with three first clamping parts, and the second connecting piece 32 is provided with three a second clamping part, and the pole lug is interference-fitted between the first clamping part and the second clamping part through the buckled first connecting part ...

Embodiment 2

[0047] The difference from the first embodiment above is that the first engaging part is a through hole 321 formed on the first connecting part 31, and the second engaging part is a block protruding toward the direction of the first connecting part 31. The shape of the block matches the shape of the through hole 321; when the first connector 31 and the second connector 32 are engaged, there is a gap with a width smaller than the thickness of the lug between the inner wall of the through hole 321 and the outer wall of the block.

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Abstract

The invention discloses a soft pack battery module with a non-welded lug connection structure, which includes a battery frame, a plurality of battery cells stacked side by side in the battery frame, and at least two bus bars arranged on the battery frame. A connecting member is provided between one pole of the battery cell and a corresponding bus bar. The connecting member includes a first connecting member, a second connecting member and a third connecting member connected in sequence. The third connecting member is fixedly connected to the bus bar. The pole lug is clamped between the first connecting piece and the second connecting piece. The first connecting piece is provided with at least one first clamping part. The second connecting piece is provided with at least one second clamping part. The pole lug is fastened by The first connecting piece and the second connecting piece are interference fit between the first clamping part and the second clamping part. The invention has a reasonable structure and adopts a fastening and fixed connection method between the connecting member and the pole lug, which facilitates assembly, disassembly and maintenance, improves assembly efficiency and enterprise benefits; and satisfies different series and parallel connection modes of lithium battery modules.

Description

Technical field [0001] The present invention relates to the technical field of power batteries, and in particular to a soft-pack battery module with a non-welded tab connection structure and a connection method. Background technique [0002] Lithium-ion batteries have the advantages of large battery capacity and small size and are widely used, especially in the automotive industry. Lithium battery modules are formed by connecting multiple battery cells in series and parallel. The working voltage of a single soft-packed lithium-ion battery cell is around 2.4-4.5V. Multiple battery cells are connected in series and parallel to form an operating voltage above 24V. Lithium battery module. In the current production process of lithium battery modules, the series and parallel connections of battery cell tabs are generally connected through bolts, soldering or laser welding. Lithium batteries connected by bolts are easy to cause short circuits and require a larger number of bolts,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/536H01M50/533H01M50/507H01M50/514
CPCH01M2220/20H01M50/50Y02E60/10
Inventor 朱云李铭政
Owner 置富电子技术(东莞)有限公司
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