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Cylindrical battery

A cylindrical battery and cell technology, applied in the direction of cylindrical shell batteries/batteries, secondary batteries, battery pack components, etc., can solve the problems of limiting the use of cylindrical batteries, battery capacity and current limitations, and occupying internal space. To achieve the effect of ensuring quality, improving safety, and increasing battery capacity and current

Pending Publication Date: 2021-07-09
惠州惠峰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many limitations in the common cylindrical battery structure currently on the market. For example, the positive and negative electrodes of the internal cells need to lead out tabs, occupying the internal space, and the tabs are usually small in size, which limits the capacity and current of the battery.
[0004] In addition, the positive and negative poles of the existing cylindrical battery are on the top and bottom of the battery, which also limits the use scenarios of cylindrical batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Figure 1 to Figure 4 It is the first embodiment of the present invention. A cylindrical battery includes a battery cell 1 , a casing assembly 2 wrapped outside the battery cell 1 , a first current collector 3 arranged on the top of the battery 1 , and a second current collector 4 arranged at the bottom of the battery 1 . The housing assembly 2 includes a bottom case 21 , a top cover 22 mounted on the bottom case 21 , and an insulating ring 23 disposed between the bottom case 21 and the top cover 22 , and the battery cell 1 is disposed in the bottom case 21 . The top cover 22 and the bottom case 21 are connected by welding. The first current collecting sheet 3 is in contact with the top cover 22 and separated from the bottom case 21 . The cell 1 includes a positive electrode sheet 11 , a negative electrode sheet 12 , and a separator 13 disposed between adjacent positive electrode sheets 11 and negative electrode sheets 12 . The positive electrode sheet 11 is electric...

Embodiment 2

[0043] Such as Figure 5 As shown, in this embodiment, the radial section of the protruding portion 2211 is a square, of course, other shapes such as polygons, circles, ellipses, irregular shapes, etc. can also be used in specific implementation. In this embodiment, the rest of the structures are the same as those in Embodiment 1, and redundant descriptions are omitted here.

[0044] First, in the present invention, since the positive electrode sheet is in direct contact with the first current collector, and the negative electrode sheet is in direct contact with the second current collector sheet, there is no need to set up an electrode sheet, which increases the volume of the positive electrode sheet and the negative electrode sheet, thereby increasing the battery capacity with current.

[0045] Second, the top cover is provided with an inner concave part, which can reduce the thickness of the top cover at the inner concave part, and when an explosion occurs, the impact forc...

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Abstract

The invention relates to the technical field of batteries, concretely relates to a cylindrical battery. The cylindrical battery comprises a battery cell, a shell assembly wrapping the battery cell, a first current collector arranged at the top of the battery cell and a second current collector arranged at the bottom of the battery cell. The shell assembly comprises a bottom shell, a top cover installed on the bottom shell and an insulating ring. The battery cell comprises a positive plate, a negative plate and a diaphragm arranged between the adjacent positive plate and negative plate; and the positive plate, the negative plate and the diaphragm form a battery cell in a winding manner. The end part, in contact with the first current collecting piece, of the positive plate is bent; and the end part, contacted with the second current collecting piece, of the negative plate is bent. The top cover comprises an inner cover body, an insulating layer and an outer cover body. The positive plate is electrically connected with the inner cover body, and the negative plate is electrically connected with the outer cover body. And the outer cover body is provided with the inner concave part, so that when the battery explodes, the impact force can break through the inner concave part and is released from the inner concave part. Therefore, the capacity and the current of the battery are increased, the quality and the safety of the battery are ensured, and the positive electrode and the negative electrode of the battery are positioned on the same side.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a cylindrical battery. Background technique [0002] Lithium battery is a type of rechargeable battery that uses graphite or other carbon materials as the negative electrode and a lithium-containing compound as the positive electrode. It is a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and uses a non-aqueous electrolyte solution. [0003] Lithium batteries have various structures according to different application scenarios, and the cylindrical structure is the more common one. There are many limitations in the common cylindrical battery structure currently on the market. For example, the positive and negative electrodes of the internal cells need to lead out tabs, occupying the internal space, and the tabs are usually small in size, which limits the capacity and current of the battery. . [0004] In addition, the posi...

Claims

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Application Information

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IPC IPC(8): H01M50/107H01M50/152H01M50/169H01M50/538H01M50/55H01M10/04H01M10/0587
CPCH01M10/0422H01M10/0587Y02P70/50Y02E60/10
Inventor 陈江峰
Owner 惠州惠峰科技有限公司
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