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Battery cell tab and battery cell

A technology of tabs and batteries, applied to circuits, electrical components, battery pack components, etc., can solve problems such as the mismatch between the size and the energy of the batteries, and achieve reduced packaging reliability exploration, reduced welding process exploration, and large area Effect

Pending Publication Date: 2022-02-18
ENVISION DYNAMICS TECH (JIANGSU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a battery tab and battery, which can reduce the cumbersome welding process exploration, without replacing the packaging tooling and process, and can also solve the problem of the mismatch between the size of the tab and the energy of the battery, and improve the overall performance of the battery. diversion capacity

Method used

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  • Battery cell tab and battery cell
  • Battery cell tab and battery cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, this embodiment provides a battery tab, including a tab body 100 and a tab glue 200 . The tab body 100 passes through the tab glue 200. The tab body 100 includes a short side 101 and a long side 102. The short side 101 is connected to the long side 102. The short side 101 extends out of one end of the tab glue 200, and the long side 102 extends out The end of the ear glue 200 away from the short side 101 , the thickness of the end of the long side 102 close to the ear glue 200 is smaller than the thickness of the end of the long side 102 away from the ear glue 200 .

[0032] The battery tab provided in this embodiment, by setting the tab body 100 and the tab glue 200, the short side 101 of the tab body 100 protrudes from one end of the tab glue 200, and the long side 102 extends out of the tab glue 200 away from the short side. At one end of the side 101, the thickness of the end of the long side 102 close to the ear glue 200 is smaller than ...

Embodiment 2

[0037] Such as figure 2 As shown, this embodiment provides a cell lug, which is different from Embodiment 1 in that a transition section 1023 is provided between the connecting section 1021 and the thickened section 1022 , and the transition section 1023 is provided with a transition arc 1024 . By setting the transition section 1023 with the transition arc 1024, the thickness increase from the connecting section 1021 to the thickening section 1022 is smoother, which is convenient for transportation and storage of the battery lug, and can prevent scratches, and the structure of the tab body 100 The stability is improved, ensuring the service life of the tab body 100 , and at the same time ensuring the overcurrent capability of the battery tab, increasing the heat dissipation area, and reducing the temperature rise of the tab body 100 .

[0038] Optionally, the radius of the transition arc 1024 is 1 mm to 10 mm, the thickness of the short side 101 is 0.2 mm to 0.6 mm, and the t...

Embodiment 3

[0040] This embodiment provides a battery cell, including the battery cell lug of the above embodiment, wherein the short side 101 is welded to the foil drawn from the pole piece, and the tab glue 200 is packaged and sealed with an aluminum-plastic film.

[0041] For the cell provided in this embodiment, the thickness of the short side 101 and the ear glue 200 are kept constant, and the long side 102 is set in a special shape, and the thickness of the long side 102 is increased. The edge is not easy to heat up to the limit temperature, and the overall conductivity of the battery cell is strong, which improves the overall conductivity of the battery cell, reduces tedious welding process exploration, does not need to replace packaging tooling and processes, reduces packaging reliability exploration, and saves time and cost. .

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Abstract

The invention belongs to the technical field of batteries, and discloses a battery cell tab and a battery cell. The battery cell tab comprises a tab body and tab glue, the tab body penetrates through the tab glue, the tab body comprises a short edge and a long edge, the short edge is connected with the long edge, the short edge extends out of one end of the tab glue, the long edge extends out of one end, deviating from the short edge, of the tab glue, and the thickness of one end, close to the tab glue, of the long edge is smaller than that of one end, away from the tab glue, of the long edge. The battery cell comprises the battery cell tab, the short edge is welded with a foil material led out from a pole piece, and tab glue and an aluminum plastic film are packaged and sealed. The battery cell tab is larger in area and thicker, the edge of the long side is not easily heated to a limited temperature, the overall flow conductivity of the battery cell is greatly improved, meanwhile, the thickness of the tab body at the short side and the tab glue is kept constant, tedious welding process exploration is reduced, a packaging tool and a packaging process do not need to be replaced, packaging reliability exploration is reduced, and time and cost are saved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to battery tabs and battery cells. Background technique [0002] Electric vehicles have higher and higher requirements for energy density. Soft-pack batteries are favored by electric vehicles due to their high energy density and small size. In order to further improve the energy density of soft-pack batteries, the following methods are generally adopted. First, by increasing The Ni content of the positive electrode material increases the energy density of the material itself, but as the Ni content increases, the thermal stability of the material will also decrease, followed by battery safety issues; second, reduce the weight of auxiliary materials, such as Reduce the thickness of the diaphragm and foil, but reducing the thickness directly increases the difficulty of the processing process, and even introduces new equipment and processes to improve the yield; third, to design a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/531H01M50/533
CPCH01M50/531H01M50/533Y02E60/10
Inventor 游悠
Owner ENVISION DYNAMICS TECH (JIANGSU) CO LTD
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