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Production method of lithium-ion power battery improving battery consistency

A power battery and production method technology, which is applied in the manufacture of battery electrodes, non-aqueous electrolyte batteries, and electrolyte batteries, can solve the problems of non-uniform consistency and differences in battery consistency, so as to improve consistency, prolong service life, Guarantee the effect of safe use

Inactive Publication Date: 2011-12-14
SHANDONG SHANGCUN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there are large differences in the consistency of the batteries produced according to the existing process methods, and they must be sorted by the final capacity detection, so the consistency of the sorting is not the real consistency

Method used

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  • Production method of lithium-ion power battery improving battery consistency
  • Production method of lithium-ion power battery improving battery consistency
  • Production method of lithium-ion power battery improving battery consistency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In the production method of the lithium-ion power battery that improves battery consistency, take the production of 100 10Ah batteries as an example.

[0042] Wherein, in step (3), the positive electrode sheet and the negative electrode sheet are divided into three grades, each including a minimum weight grade, an intermediate weight grade and a maximum weight grade. The weight range value corresponding to each grade of the positive plate: the smallest weight range: greater than or equal to 9.01g and less than or equal to 9.19g; the middle weight range: greater than or equal to 9.2g and less than or equal to 9.37g; the largest weight range: greater than or equal to 9.38g and less than or equal 9.55g.

[0043] In step (4), the total weight of the positive plates of 100 batteries is controlled respectively. The total number of positive electrodes in a single battery is 14, and the total weight range is 130±0.5g. In comparison, the total number of positive pole sheets of...

Embodiment 2

[0055] In the production method of the lithium-ion power battery that improves battery consistency, take the production of 100 20Ah batteries as an example.

[0056] Wherein, in step (3), the positive electrode sheet and the negative electrode sheet are divided into three grades, each including a minimum weight grade, an intermediate weight grade and a maximum weight grade. The weight range value corresponding to each grade of the positive plate: the smallest weight grade: greater than or equal to 13.34g and less than or equal to 13.62g; the middle weight grade: greater than or equal to 13.63g and less than or equal to 13.9g; 14.18g.

[0057] In step (4), the total weight of the positive plates of 100 batteries is controlled respectively. The total number of positive electrodes in a single battery is 19, and the total weight range is 261.5±0.5g. In comparison, the total number of positive pole sheets of the single battery produced in the prior art is the same as that of the ...

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Abstract

The invention discloses a production method of a lithium ion power battery with consistency improved. According to the invention, anode sheets and cathode sheets are obtained through coating and cutting technologies, and are graded according to the weight of each sheet; a total weight of anode sheets in a single battery is controlled through steps that: a group of anode sheets with a total anode sheet number required by the single battery is weighed, wherein the anode sheets can be selected from a middle weight grade, or can be randomly selected from at least two weight grades; according to ameasured weight, anode sheets in the grade of a larger weight are replaced by anode sheets in the grade of a smaller weight, or anode sheets in the grade of a smaller weight are replaced by anode sheets in the grade of a larger weight; finally, the total weight of the anode sheets is controlled within a required total weight range. With the production technology modification provided by the invention, consistency of the lithium ion power battery is greatly improved, service life of the lithium ion power battery is prolonged, and application safety of the lithium ion power battery is ensured.

Description

technical field [0001] The invention relates to the technical field of production methods of lithium-ion power batteries. Background technique [0002] As a new type of energy storage battery, lithium-ion power battery has become an electric vehicle storage battery because of its high specific energy and high specific power, mature charging and discharging technology, low self-discharge, friendly manufacturing environment, no pollution, long life, and maintenance-free. The first choice of energy source. [0003] There are many production processes of lithium-ion power batteries, and there are many factors that affect the battery. The performance of the cells produced by the battery through multiple processes is quite different, which affects the application of lithium-ion power batteries in electric vehicles. Electric vehicles require high energy storage, which requires the use of many single batteries, which are combined in series and parallel to meet the large capacity an...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M4/139
CPCY02E60/12Y02E60/122Y02E60/10Y02P70/50
Inventor 徐建华张国华刘春彬杨爱民纪士洲
Owner SHANDONG SHANGCUN ENERGY
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