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Secondary battery, battery module and electric device

A secondary battery and cell technology, applied to battery pack parts, battery cover/end cover, battery box/outer, etc., can solve the problems of high structural cost, increase the internal space of the cell, and many processes, and achieve simplification Effect of production process, improvement of flow performance, and increase of contact area

Pending Publication Date: 2021-08-27
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing structure, the tabs of the battery cell are super-welded with the adapter piece first, and then placed on the bottom of the top cover pole for laser welding to realize the function of the battery cell. However, this structure has high cost and many processes, and the adapter piece The thickness will also increase the internal space of the cell

Method used

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  • Secondary battery, battery module and electric device
  • Secondary battery, battery module and electric device
  • Secondary battery, battery module and electric device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] A secondary battery includes a top cover sheet 1, a cell assembly, and an insulating member 9 disposed between the top cover sheet 1 and the cell assembly to isolate the cell assembly and the top cover sheet 1; at least one cell assembly, cell The assembly includes the cell body 3 and the tab 4 provided on the cell body 3; the pole 2, the pole 2 passes through the top cover sheet 1 and the insulator 9 and is connected to the tab 4; the lower end of the pole 2 is along the insulator The lower surface of 9 is extended to form an extension part 20 , and the extension part 20 is fixedly connected with the tab 4 .

[0051] Because in the existing structure, the cell lug is super-welded with the adapter piece first, and then placed on the bottom of the top cover pole for laser welding to realize the function of the cell, but this structure has high cost, many processes, and the transfer The thickness of the sheet will also increase the internal space of the cell. Therefore, a...

Embodiment approach 2

[0062] The difference from Embodiment 1 is that this embodiment includes two battery core bodies 3, where the two tabs 4 of one battery core body 3 are fixedly connected to the extensions 20 of the two poles 2, and the other battery core body The two tabs 4 of 3 are also fixedly connected to the extensions 20 of the two poles 2 respectively. In this embodiment, the cell bodies 3 are arranged side by side, and the two tabs 4 with the same polarity are connected to the extension 20 of the same pole 2, and the extension 20 is arranged around the edge of the main body 23, so that the same extension 20 can connect two tabs 4 with the same polarity, that is to realize the parallel connection between two cell bodies 3, increase the number of cell bodies 3 in the battery, and help to increase the energy density of the battery.

[0063] In addition, in some embodiments, four cell bodies 3 may also be included. Specifically, four cell assemblies are arranged side by side along the width...

Embodiment approach 3

[0066] The difference from the first embodiment is that this embodiment also includes a protective piece 6, the protective piece 6 includes a second connecting portion 61 and a second bending portion 62 connected in sequence, and the second connecting portion 61 is fixed to the first connecting portion by welding 41, the second bending portion 62 is bent along the inner surface of the first bending portion 42, the first connecting portion 41 and the second connecting portion 61 form a second welding footprint by welding, and the protection member 6 also includes The turning portion 63 is connected to the second bending portion 62 , and the second connecting portion 61 , the second bending portion 62 and the turning portion 63 form a U-shaped structure. In this embodiment, the protection piece 6 is added to prevent the folded part of the tab 4 from being inserted into the cell body 3; to prevent the burrs generated by welding from passing through the tab 4 and even inserting int...

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Abstract

The invention belongs to the technical field of batteries, and particularly relates to a secondary battery which comprises a top cover plate (1), a battery cell assembly and an insulating part (9) which is arranged between the top cover plate (1) and the battery cell assembly and is used for isolating the battery cell assembly from the top cover plate (1), wherein the at least one battery cell assembly comprises a battery cell body (3) and a tab (4) arranged on the battery cell body (3); and also comprises a pole (2) which penetrates through the top cover plate (1) and the insulating part (9) and is connected with the tab (4); the lower end of the pole (2) extends along the lower surface of the insulating part (9) to form an extension part (20), and the extension part (20) is fixedly connected with the tab (4). According to the invention, a switching piece is omitted, production parts and procedures are simplified, and the production cost is reduced. In addition, the invention also discloses a battery module and an electric device.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a secondary battery, a battery module and an electrical device. Background technique [0002] With the development of modern society and the enhancement of people's awareness of environmental protection, more and more devices choose to use lithium batteries as power sources, such as mobile phones, notebook computers, power tools and electric vehicles, etc., which provides a great opportunity for the application and development of lithium batteries wide open space. Among them, lithium batteries used in electric tools and electric vehicles are generally called power batteries. The battery lug is welded to the pole through the adapter piece, which has been widely used in the top cover setting of the power battery. [0003] In the existing structure, the tabs of the battery cell are super-welded with the adapter piece first, and then placed on the bottom of the top co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/552H01M50/533H01M50/534H01M50/593H01M50/147
CPCH01M50/552H01M50/533H01M50/534H01M50/593H01M50/147Y02E60/10H01M50/15H01M50/176H01M50/188
Inventor 李勇军卢军太邹武元陈圣立
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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