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Cell and production method thereof

A battery and positive electrode technology, applied in the field of battery and its preparation, can solve the problems of difficult core winding, the total thickness of the core group, thick winding core, and complex design and manufacturing process of multi-pole tabs, etc., to achieve simple operation, easy realization of manufacturing process, The effect of excellent magnification performance

Pending Publication Date: 2018-03-09
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the inventors of the present invention have at least the following problems in the above two schemes for reducing the internal resistance of the battery and improving the rate performance: (1) For the above-mentioned first scheme, the design of multi-pole ears and the manufacturing process are relatively complicated
Because the total thickness of the winding core group is thicker and the number of winding cores is large, it is difficult to lead out the tabs of the winding cores, which increases the difficulty of making multi-core pouch batteries

Method used

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  • Cell and production method thereof
  • Cell and production method thereof

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Embodiment 1

[0064] This embodiment provides a battery, such as figure 1 and figure 2 As shown, the battery 1 in this embodiment includes a winding core assembly, a connection structure, and tabs. Wherein, the winding core group includes a plurality of winding cores 11 , and each winding core 11 has a positive pole lug and a negative pole lug. The connection structure includes a positive connection structure 12 and a negative connection structure (not shown); wherein, the positive connection structure 12 is connected to all positive tabs of the core set; the negative connection structure is connected to all negative tabs of the core set. The tab includes a positive tab 13 and a negative tab 15 ; wherein, the positive tab 13 is connected to the positive connecting structure 12 ; the negative tab 15 is connected to the negative connecting structure.

[0065] The battery provided in this embodiment includes a plurality of winding cores, so that the rate performance of the battery is excell...

Embodiment 2

[0072] Preferably, this embodiment provides a battery, compared with the previous embodiment, such as figure 1 As shown, the present embodiment is further designed as follows:

[0073] In this embodiment, the positive connection structure 12 includes a plurality of positive connection strips, the number of positive connection strips is the same as the number of winding cores 11 in the winding core group, and corresponds to each other; wherein, each positive connection strip has a first part and the second part; and, the first part of each positive connecting strip is connected to the positive tab of the corresponding winding core. Similarly, the negative connection structure includes a plurality of negative connection strips, and the number of negative connection strips is the same as the number of winding cores in the winding core group, and corresponds to each other; wherein, each negative connection strip has a first part and a second part. two parts; and, the first part o...

Embodiment 3

[0079] Preferably, this embodiment provides a battery, compared with the previous embodiment, such as figure 1 As shown, the present embodiment is further designed as follows:

[0080] In this embodiment, one of the positive connection strips in the positive connection structure 12 is the first positive connection strip, and the rest of the positive connection strips are the second positive connection strips; when the second parts of all the positive connection strips are stacked and connected, the first positive connection The second part of the connection belt is located on the side of the positive electrode connection structure away from the winding core group. The positive electrode tab 13 is connected (preferably welded, more preferably ultrasonically welded) to the first positive electrode connecting strip. One of the negative connection strips in the negative connection structure is the first negative connection strip, and the rest of the negative connection strips are...

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Abstract

The invention discloses a cell and a production method thereof and relates to the technical field of cells. The main technical scheme includes that the cell comprises a roll core group, a connecting structure and tabs, wherein the roll core group comprises a plurality of roll cores, each consisting of a positive electrode lug and a negative electrode lug; the connecting structure comprises a positive electrode connecting structure and a negative electrode connecting structure, the positive electrode connecting structure is connected with all the positive electrode lugs in the roll core group,and the negative electrode connecting structure is connected with all the negative electrode lugs; the tabs include a positive electrode tab and a negative electrode tab, wherein the positive electrode tab is connected with the positive electrode connecting structure, and the negative electrode tab is connected with the negative electrode connecting structure. The cell mainly refers to a multi-roll-core pouch cell high in rate capability, and the corresponding production method is simple.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a battery and a preparation method thereof. Background technique [0002] At present, the battery core of the soft-pack lithium-ion battery mainly adopts a winding structure. The wound battery core has the advantages of simple operation, convenient automatic production and high yield. Most wound battery cells generally consist of a single wound core. However, if a large-capacity battery is produced, the pole piece for making the winding core is longer, which increases the difficulty of coating, sheet making and winding, and affects the production efficiency and yield of the battery; and the longer pole piece will increase the battery life. The internal resistance reduces the rate performance of the battery. [0003] In order to reduce the internal resistance of the soft-packed lithium-ion battery and improve the rate performance of the soft-packed lithium-ion battery, there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M2/26H01M10/0587H01M50/538
CPCH01M10/0525H01M10/0587H01M50/538Y02E60/10Y02P70/50
Inventor 陈宝荣蒋世用钟宽曾庆苑李影
Owner GREE ELECTRIC APPLIANCES INC
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