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Connection structure of flexibly-packaged high-capacity battery cell and pole

A battery cell and connection structure technology, which is applied in the field of connection structure between soft-packed high-capacity battery cells and poles, can solve the problems of increasing the internal resistance of the tabs, affecting the overcurrent capability of the tabs of the cell, etc. The effect of large connection area, prevention of virtual welding, and increase of overcurrent area

Pending Publication Date: 2022-03-25
SHAANXI OLYMPUS POWER ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the above-mentioned prior art that punching holes on the tabs will seriously affect the overcurrent capability of the tabs of the battery cell, and at the same time increase the internal resistance of the tabs, the present invention proposes a soft-packed large-capacity battery cell and pole connection structure

Method used

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  • Connection structure of flexibly-packaged high-capacity battery cell and pole
  • Connection structure of flexibly-packaged high-capacity battery cell and pole
  • Connection structure of flexibly-packaged high-capacity battery cell and pole

Examples

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Embodiment 1

[0043] see Figure 1-Figure 2 , the present embodiment is a connection structure between a soft-packed large-capacity battery cell and a pole, which includes a soft-packed cell 1 and a bus bar 4, and the bus bar 4 is divided into a positive bus bar and a negative bus bar. Through holes 42 are provided on the negative busbars, and connecting plates 41 are arranged at the throughholes 42. The busbars 4 are plate-shaped structures with a rectangular cross section. The ear 6 is divided into a positive pole lug and a negative pole lug. The positive pole lug runs through the through hole on the positive pole bus and fits the connection plate 41 on the positive pole bus. The negative pole lug runs through the through hole on the negative pole bus and the connection plate on the negative pole 41 fit.

[0044] Preferably, the through holes 42 in this embodiment are arranged along the width direction of the bus bar 4 .

[0045] Preferably, the connecting plate 41 of this embodiment is a...

Embodiment 2

[0047] This embodiment is a connection structure between a soft-packed large-capacity battery cell and a pole. On the basis of Embodiment 1, there are 50 soft-packed cells 1, and the 50 soft-packed cells 1 are arranged side by side in two rows. , 25 in each row, and each row is correspondingly provided with a positive electrode bus bar and a negative electrode bus bar.

[0048] The positive tabs on the pouch cell 1 are connected in one-to-one correspondence with the through holes 42 on the corresponding positive busbar; the negative tabs on the pouch cell 1 are connected in one-to-one correspondence with the through holes 42 on the negative busbar.

[0049] see image 3 , or 5 pouch cells 1 in each row as a group, a tab bundle 61 formed by connecting positive tabs on 5 pouch cells 1 in the same group, and 5 pouch cells in the same group The negative tabs on 1 are connected to form a tab bundle 61, that is, the positive tabs and negative tabs formed in each row form five tab b...

Embodiment 3

[0057] This embodiment is a connection structure between a soft-packed large-capacity battery cell and a pole. On the basis of Example 2, 30 soft-packed cells 1 are stacked side by side to form a battery module. The splint 2 clamps and fixes 30 padded cells 1 through the fixed splint 2; the fixed splint 2 and the padded cell 1 are arranged side by side.

[0058] Preferably, in this embodiment, six screw rods 3 are arranged between the two fixing splints 2 , and the six screw rods 3 are in two groups respectively, and are respectively arranged on opposite sides of the battery module.

[0059] The fixing splint 2 in this embodiment can be one of PP board, PE board, PVC board, PET board, PPS board, PPA board, PEEK board or LCP board; it can play the role of insulation.

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Abstract

The invention provides a connection structure of a soft-package high-capacity battery cell and a pole, and belongs to the technical field of energy storage batteries, the connection structure comprises a soft-package battery cell and a busbar, the busbar is provided with a through hole, a connection plate is arranged at the through hole, the soft-package battery cell is connected with a tab, and the tab penetrates through the through hole in the busbar and is attached to the connection plate. According to the invention, the through hole is formed in the busbar, and no hole is formed in the tab, so that the internal resistance of the tab is not increased; and meanwhile, the tabs are attached to the connecting plates, so that the connecting area of the tabs and the busbars is increased, namely, the overcurrent area of the tabs and the busbars is increased, and pseudo soldering can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of energy storage batteries, and relates to a connection technology of a cell and a pole, in particular to a connection structure of a battery cell and a pole of a soft-packed large-capacity battery. Background technique [0002] The soft-pack battery is a kind of battery formed relative to the hard-shell battery. Its positive electrode, negative electrode, diaphragm, and electrolyte are not much different from the hard-shell battery. The biggest difference is that the soft-pack battery uses aluminum-plastic composite film as the shell. Square hard batteries and cylindrical hard batteries use metal materials as their casings. Soft-pack batteries have many advantages such as good safety, light weight, high energy density, good electrochemical performance, and long life. Under the requirements of the big core, the development of power soft-packed batteries is accelerating, and they are emerging in the pure el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/503H01M50/505H01M50/514H01M50/516H01M50/211H01M50/244H01M50/264H01M10/613H01M10/647H01M10/655
CPCH01M50/505H01M50/503H01M50/516H01M50/211H01M50/244H01M50/264H01M50/514H01M10/613H01M10/647H01M10/655Y02E60/10
Inventor 杨战军雷政军郑高峰刘毅翟腾飞
Owner SHAANXI OLYMPUS POWER ENERGY CO LTD
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