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Battery cell, battery and electronic equipment

A cell and battery technology, applied in the field of electrochemistry, can solve the problems of waste of space, reduction of cell packaging space, disadvantages and other problems

Active Publication Date: 2021-11-05
DONGGUAN NVT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a folded top-sealed battery, the packaging part of the battery is bent and fixed to one end surface of the battery. Correspondingly, the tabs of the battery are also bent so as to be electrically connected to the circuit board. There is tab glue, but in order to ensure the sealing effect of the package at the position where the tab protrudes and avoid contact between the tab and the exposed aluminum layer of the package, the tab glue generally protrudes from the package by a certain length, and is limited by existing At the level of production technology, the length of the protruding part of the tab glue is often more than 1mm. Due to the high hardness of the tab glue, it is not only difficult to bend, but also occupies a large length in the direction of the battery length after bending, resulting in battery failure. The waste of space in the length direction is not conducive to reducing the packaging space of the battery cell and increasing the battery capacity

Method used

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  • Battery cell, battery and electronic equipment
  • Battery cell, battery and electronic equipment
  • Battery cell, battery and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] Please also refer to Figure 1 to Figure 6 As shown, the battery cell 10 of this embodiment includes a packaging bag 11 , an electrode assembly (not shown), tabs 13 , and tab glue 14 .

[0044] The packaging bag 11 surrounds the shape of the electric core 10, and can also be used to define the appearance of the electric core 10. For example, the packaging bag 11 includes a packaging part 11a and a main body part 11b, and the electrode assembly is arranged in the main body part 11b. The packaging part 11a and the main body part 11b The tab 13 extends from the first end surface of the main body 11b. The first end surface of the main body 11b can be regarded as the first end surface 10a of the battery cell 10 , which will be described below as an example. The main body part 11b is formed with a housing cavity, and the internal components of the battery cell 10 (such as electrode assembly and electrolyte) are contained in the housing cavity, and the internal components are...

no. 2 example

[0065] The various embodiments of the present application use the same reference numerals to identify structural elements with the same names.

[0066] On the basis of the description of the previous embodiment, but different from it, such as Figure 8 and Figure 9 As shown, it is a structural schematic diagram of the tab glue 14 in an unbent state. In the battery cell 10 of this embodiment, when the battery cell 10 is in an unbent state, the space-avoiding areas 141d are distributed at intervals on the exposed portion 141 perpendicular to the direction in which the tabs 13 extend; when the battery cell 10 is in a bent state, The avoidance areas 141d are distributed at intervals along the third direction z on the bending portion 141b. The first bending part 141e and the second bending part 141f are still connected, but not completely disconnected, which is beneficial to improve the structural strength of the bending part 141b, improve the protection effect of the tab 13, an...

no. 3 example

[0070] On the basis of the description of the foregoing first embodiment, but different from it, please refer to Figure 10 and Figure 11 As shown, it is a structural schematic diagram of the tab glue 14 in an unbent state. Along the third direction z, the length of the first bending portion 141e remains constant before and after bending, and the length of the second bending portion 141f also remains constant before and after bending. For ease of description, this embodiment is in the unbent state Figure 10 and Figure 11 The middle indicates the difference between the lengths of the first bent portion 141e and the second bent portion 141f.

[0071] In the cell 10 of this embodiment, when the cell 10 is in an unbent state, along the direction y perpendicular to the extension of the tab 13, at least one side of the tab (such as Figure 11 the left side and the right side shown), the length of the first part 1411 is smaller than the length of the second part 1412, when the...

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Abstract

The invention discloses a battery cell, a battery and electronic equipment. Tab glue comprises an exposed part extending out of a packaging part, the exposed part is provided with a clearance area, and the clearance area forms an easy folding line perpendicular to the extending direction of a tab on the tab glue. The clearance area can reduce the bending difficulty of the tab glue, and the length of a bent part in the length direction of the battery cell is reduced after the bent part is bent, so that the packaging space of the battery cell is reduced, and the capacity of the battery cell and the battery is improved.

Description

technical field [0001] The present application relates to the field of electrochemical technology, in particular to a cell, a battery and electronic equipment. Background technique [0002] With the vigorous development of electrochemical technology, people have higher and higher requirements for battery capacity improvement. In order to increase the battery capacity, current manufacturers usually optimize the design of the head space of the battery, among which the folded top-sealed battery is currently a more popular type of battery. In a folded top-sealed battery, the packaging part of the battery is bent and fixed to one end surface of the battery. Correspondingly, the tabs of the battery are also bent so as to be electrically connected to the circuit board. There is tab glue, but in order to ensure the sealing effect of the package at the protruding position of the tab and to avoid contact between the tab and the exposed aluminum layer of the package, the tab glue gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/533
CPCH01M50/533Y02E60/10
Inventor 麻昊黄小钊
Owner DONGGUAN NVT TECH
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