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A method for lithium-ion batteries from formation to assembly

A lithium-ion battery, matching technology, applied in secondary batteries, electrochemical generators, secondary battery testing and other directions, can solve the problems of long production time, cumbersome battery production process, etc., to reduce energy loss and solve the production process. cumbersome effect

Active Publication Date: 2022-04-12
江西安驰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a convenient method for lithium-ion batteries from formation to assembly, so as to solve the problems of cumbersome battery production process and long production time. energy loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for lithium-ion batteries from formation to assembly, comprising the following steps:

[0031] S1. After the first liquid injection is completed, frame the qualified battery cells for liquid injection, and insert sealing nails for sealing;

[0032] S2. After confirming the seal, transfer the cell to a high-temperature storage at 45±2°C for high-temperature activation for 12 hours;

[0033] S3. Transfer the high-temperature activated cells to the formation workshop, remove the sealing nails, and then transfer the cells to the high-temperature vacuumized formation cabinet. The ambient temperature of the formation cabinet is 45±2°C, and the relative vacuum degree of the vacuum is -80kPa~95kPa. First charge at 0.05C for 10 minutes, then charge at 0.1C to 10% of the charged state, select according to voltage and charged power, and eliminate those that have not charged enough power and abnormal voltage;

[0034] S4. Put the normally charged battery into the sealing ...

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Abstract

The invention belongs to the technical field of batteries, and in particular relates to a method from formation to assembly of lithium ion batteries, comprising the following steps: S1. After liquid injection once, seal the battery cell; S2. Activate at high temperature once; S3. Charge with a 0.1C formation current to a charged state of 5-10%; S4. Seal the pre-formation cell and activate it at high temperature for the second time; S5. Transfer to the formation workshop, remove the seal, and transfer to a high-temperature vacuum formation cabinet, 0.33C formation current charging to 34-36% charged state; S6. Secondary liquid injection for rehydration and sealing; S7. High temperature aging; S8. Testing the voltage and insulation of the battery cell; S9. Conditions at 25±2°C Leave it aside for 5-7 days; S10. Test the voltage, internal resistance, thickness, side voltage and insulation of the cells, and group them according to the performance data of the cells; S11. Group the cells according to the grouping results of S10.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method from formation to assembly of lithium ion batteries. Background technique [0002] Energy shortage and environmental pollution are two major problems facing modern society. In order to alleviate the pressure on energy and environment, the new energy electric vehicle industry has emerged as the times require. The rapid development of electric vehicles and the gradual replacement of fuel vehicles has become an inevitable trend of the times. Lithium-ion batteries have the advantages of good cycle performance, high energy density, no memory effect, green and pollution-free. [0003] In the production and use of lithium-ion batteries, two processes of formation and assembly are indispensable; at present, the production process of lithium-ion batteries is to bake the assembled individual cells in turn to remove moisture, and then inject liquid at one time. , hig...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/44H01M10/42
CPCH01M10/058H01M10/446H01M10/4207H01M10/4285Y02E60/10Y02P70/50
Inventor 张近钢徐小明谢爱亮白科黄浩游杰陈富源
Owner 江西安驰新能源科技有限公司
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