Lithium ion battery formation method

A lithium-ion battery and formation method technology, which is applied in the field of lithium-ion battery formation, can solve the problems of wasting cost and process time, time and many operators, complicated process, etc., and achieve consistent thickness, improved cycle performance, and consistent capacity performance, good interface

Pending Publication Date: 2022-07-12
HUIZHOU HENGTAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this chemical formation process is complicated, and there are many factors that need to be controlled. The entire chemical formation process requires a lot of time and operators, which wastes a lot of cost and process time.
The interface of lithium-ion batteries treated by traditional constant temperature and constant flow formation method is not good, and many black spots and lithium precipitation are prone to appear, and the capacity consistency, thickness consistency and electrical performance are difficult to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The lithium-ion battery formation method includes the following steps:

[0030] (1) Set the initial thickness of the battery as T 0 , set the first target thickness of the battery as T 1 , carry out the first-stage formation of the battery, and set the temperature of the first-stage formation as C 1 , the current is A 1 and time t 1 ;

[0031] (2) The second-stage formation is performed on the battery obtained in step (1), and the second target thickness of the battery is set as T 2 , the temperature of the second section is heated to C 2 , the holding time is t 2 , and increase the current formed by the second section to A 2 ;

[0032] (3) The third stage of formation is performed on the battery obtained in step (2), and the third target thickness of the battery is set as T 3 , so that the temperature of the third-stage formation is raised to C 3 , the holding time is t 3 , and increase the current formed by the third stage to A 3 ;

[0033] (4) The fourth...

Embodiment 2

[0039] The lithium-ion battery formation method includes the following steps:

[0040] (1) Set the initial thickness of the battery as T 0 , set the first target thickness of the battery as T 1 , carry out the first-stage formation of the battery, and set the temperature of the first-stage formation as C 1 , the current is A 1 and time t 1 ;

[0041] (2) The second-stage formation is performed on the battery obtained in step (1), and the second target thickness of the battery is set as T 2 , the temperature of the second section is heated to C 2 , the holding time is t 2 , and increase the current formed by the second section to A 2 ;

[0042] (3) The third stage of formation is performed on the battery obtained in step (2), and the third target thickness of the battery is set as T 3 , so that the temperature of the third-stage formation is raised to C 3 , the holding time is t 3 , and increase the current formed by the third stage to A 3 ;

[0043] (4) The fourth...

Embodiment 3

[0049] The lithium-ion battery formation method includes the following steps:

[0050] (1) Set the initial thickness of the battery as T 0 , set the first target thickness of the battery as T 1 , carry out the first-stage formation of the battery, and set the temperature of the first-stage formation as C 1 , the current is A 1 and time t 1 ;

[0051] (2) The second-stage formation is performed on the battery obtained in step (1), and the second target thickness of the battery is set as T 2 , the temperature of the second section is heated to C2 , the holding time is t 2 , and increase the current formed by the second section to A 2 ;

[0052] (3) The third stage of formation is performed on the battery obtained in step (2), and the third target thickness of the battery is set as T 3 , so that the temperature of the third-stage formation is raised to C 3 , the holding time is t 3 , and increase the current formed by the third stage to A 3 ;

[0053] (4) The fourth s...

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Abstract

The invention relates to the technical field of batteries, and discloses a lithium ion battery formation method which comprises the following steps: setting the initial thickness T0 of a battery and the first target thickness T1 of the battery, performing first-stage formation on the battery, and setting the temperature C1, the current A1 and the time t1 of the first-stage formation; performing second-stage formation on the obtained battery, setting a second target thickness T2 of the battery, increasing the temperature of the second-stage formation to C2, keeping the temperature for t2, and increasing the current of the second-stage formation to A2; performing third-section formation on the obtained battery, setting a third target thickness T3 of the battery, increasing the temperature of the third-section formation to C3, keeping the temperature for t3, and increasing the current of the third-section formation to A3; and performing fourth-section formation on the obtained battery, setting a fourth target thickness T4 of the battery, reducing the temperature of the fourth-section formation to C4, keeping the temperature for t4, and reducing the current of the fourth-section formation to A4. According to the method, the thickness consistency, the capacity consistency and the cycle performance of the formed battery can be improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for forming lithium ion batteries. Background technique [0002] Lithium batteries have the advantages of high voltage, large specific energy, long charge and discharge life, safety and environmental protection, so they are widely used in various electronic products (such as mobile phones, digital cameras, notebook computers, power tools), portable small electrical appliances, electric vehicles and energy storage systems. [0003] The preparation process of lithium batteries is complicated, including stirring, coating, drying, bare cell preparation, packaging, and chemical formation. important role. [0004] At present, the formation process of lithium batteries is to encapsulate the bare cells into the shell, and then quantitatively inject the electrolyte, and then form after a period of standing. However, this chemical formation process is complicated, and there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/0525H01M10/058
CPCH01M10/446H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 黄锐升李路强曾贤华
Owner HUIZHOU HENGTAI TECH
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