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Lithium-ion power battery and manufacturing method thereof

A power battery and manufacturing method technology, applied in the field of lithium-ion batteries, can solve the problems of small internal space of the battery case, uneven heat distribution of the battery, short circuit of the positive and negative tabs, etc., to reduce the risk of short circuit and increase the spacing , reduce the effect of local heating

Inactive Publication Date: 2010-12-29
TIANJIN ENERGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that due to the small internal space of the battery case, the distance between the positive and negative tabs is very small, and there is a risk of short-circuiting the positive and negative tabs when encountering external vibrations.
Moreover, the only path for the tab battery current, all the tabs are concentrated at one end of the battery, which is not conducive to the heat dissipation of the tabs, resulting in uneven heat distribution of the entire battery

Method used

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  • Lithium-ion power battery and manufacturing method thereof
  • Lithium-ion power battery and manufacturing method thereof
  • Lithium-ion power battery and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] figure 2 It is a three-dimensional structure diagram of the lithium-ion power battery described in this embodiment, image 3 for figure 2 Schematic diagram of the structure of the battery cell, Figure 4 for figure 2 Partial cross-sectional view of the middle cover device.

[0043] The lithium-ion power battery specifically includes:

[0044] Housing 10, the housing 10 is cylindrical, and the housing can be made of hard material, preferably metal material or hard plastic;

[0045] The battery core 13 is located inside the casing 10, and the battery core 13 may be composed of a plurality of sub-cells made by a winding process in parallel, or may be only one winding core;

[0046] The cover plate device 14 is fixedly connected with the opening of the casing 10 , and seals the battery core 13 in the casing 10 .

[0047] Wherein, the cover device 14 includes: a cover 11 and a stud 12, the stud 12 includes a threaded portion 121 and an extension handle (not shown) p...

Embodiment 2

[0060] Figure 5 It is a flow chart of the lithium-ion power battery manufacturing method described in this embodiment, and the manufacturing method includes the following steps:

[0061] Step S1: Connect one end of the positive tab to the positive pole piece, and the other end protrudes from the edge of the positive pole piece as the protruding end, and connect one end of the negative pole lug to the negative pole piece, and the other end protrudes from the negative pole piece The edge of the electrode is used as the protruding end; wherein, the positive electrode tab is, for example, aluminum foil, and the negative electrode tab is, for example, nickel or copper foil;

[0062] Step S2: forming a battery core by using the positive pole piece, the negative pole piece and the diaphragm, and keeping the protruding end of the positive pole lug and the protruding end of the negative pole lug respectively located at both ends of the battery core;

[0063] Step S3: Put the battery ...

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Abstract

The invention provides a lithium-ion power battery and a manufacturing method thereof. The battery comprises a shell, a battery cell and a cover plate device, wherein the battery cell is arranged in the shell and is provided with cathode and anode tabs; the cover plate device is connected with the opening of the shell, seals the battery cell in the shell and is provided with cathode and anode terminals; the cathode tab is electrically connected with the cathode terminal; the anode tab is electrically connected with the anode terminal; and the cathode tab and the anode tab respectively extend out of the two ends of the battery cell. The lithium-ion power battery and the manufacturing method thereof can reduce the risks of short circuits of the cathode and anode tabs.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion power battery and a manufacturing method thereof. Background technique [0002] Lithium-ion battery is a new type of battery successfully developed in the 20th century. Because of its high specific energy, stable discharge voltage, no memory effect, and environmental protection, it has been widely used in military and civilian small electrical appliances in recent years, such as mobile phones. , portable computers, video cameras, cameras, etc., to replace traditional batteries. At present, lithium-ion power batteries with a capacity greater than 3Ah have been used in electric scooters, electric bicycles, UPS power supplies and portable electric tools, and are expected to become one of the main power sources for electric vehicles in the 21st century. Energy storage has broad prospects. [0003] figure 1 It is a schematic structural diagram of a lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38H01M2/26H01M2/02H01M2/30H01M2/10H01M50/107H01M50/531H01M50/548H01M50/559H01M50/567
CPCY02E60/10Y02P70/50
Inventor 郭春泰袁定凯王易玮王驰伟
Owner TIANJIN ENERGIES