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A method of manufacturing a battery

A manufacturing method and battery technology, which is applied in the field of battery manufacturing, can solve the problems of complicated process and inability to carry out industrial application, and achieve the effects of reducing liquid swelling, reducing the cycle performance of battery cells, and reducing excessive internal resistance

Active Publication Date: 2021-06-22
NINGBO VEKEN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is complex and cannot be applied industrially

Method used

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  • A method of manufacturing a battery
  • A method of manufacturing a battery
  • A method of manufacturing a battery

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Embodiment Construction

[0030] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0031] See figure 1 , the invention discloses a method for manufacturing a battery, comprising the steps of:

[0032] Preset the weight of positive and negative materials according to the battery model;

[0033] According to the formula Respectively get fully charged positive hole V 1 and the fully charged negative hole V 2 ;

[0034] m 1 Indicates the weight of positive electrode material, a 1 Indicates the design compaction of positive electrode, b 1 Indicates the full-charge rebound ratio of the positive electrode, ρ 1 It is positive and true;

[0035] m 2 Indicates the negative material weight, a 2 Design compaction for the negative electrode, b 2 Indicates the full-charge rebound ratio of the negative ele...

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Abstract

The invention discloses a method for manufacturing a battery, which comprises the steps of: loading a winding core into an aluminum plastic mold punched into a shell and packaging it into a battery core; After packaging, the cells are baked, and the injection volume V 5 And seal; make the sealed battery cells undergo high-temperature activation and high-temperature pressure formation; after formation, repackage the battery cells. The invention discloses a method for manufacturing a battery. By defining the 100% SOC state of the battery to determine the corresponding liquid injection volume, the battery can be manufactured with the liquid injection volume as a standard, and the electrolysis required by the polymer battery can be more accurately evaluated. The amount of liquid can reduce the risk of battery cycle performance degradation and high internal resistance caused by insufficient liquid injection in the manufacturing process of the battery; reduce the risk of swelling and softening of the battery due to excessive liquid injection; accurately draw The relationship between the porosity filling ratio and the cycle is clarified; the lower limit of the liquid retention coefficient required to meet the cycle is more accurately evaluated.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for manufacturing batteries. Background technique [0002] Since the amount of electrolyte retention in the soft-pack lithium battery affects the electrical performance of the battery, especially the cycle performance, safety performance, cost, and appearance, the liquid retention coefficient in the soft-pack lithium battery market is determined by cycle tests. There are many systems and models. If each system and model confirms the liquid retention coefficient through a cycle test, the cycle test takes a long time, takes up a lot of resources, and cannot meet the rapidly changing market demand. Therefore, a theoretical calculation method is needed for guidance to initially confirm the electrolyte usage. [0003] CN105787140A discloses a method for calculating the liquid retention capacity by testing the porosity of pole pieces and diaphragms. The disadvantage of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0587H01M50/609
CPCH01M10/0587Y02E60/10Y02P70/50
Inventor 岳娟宋春冬章海峰卢永彬刘继洋杜晨树
Owner NINGBO VEKEN BATTERY
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