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A cold pressing process of mixed solid-liquid electrolyte lithium battery

A lithium battery and electrolyte technology, applied in the field of cold pressing technology, can solve the problems of gas cannot be discharged in time, battery packaging deformation, broken, etc., to achieve the effect of improving cooling effect, avoiding shape deformation, and long life

Active Publication Date: 2022-04-05
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the traditional cold pressing process, the maximum pressure is applied only once in the whole process, and the gas in the battery package is often unable to be discharged in time at the moment of extrusion, so it will affect the battery package, which is easy to cause deformation of the battery package even thinned or broken

Method used

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  • A cold pressing process of mixed solid-liquid electrolyte lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A cold press fixture, as attached figure 1 As shown, the laminate 1 is included, and there is a driving mechanism on the laminate 1, which can drive the pressure between the two laminates 1. The specific driving mechanism can be selected according to the actual situation. An oil cylinder is respectively arranged on the back side.

[0038] In addition, there is a supporting film 2 between the two layers of boards 1 , and the upper edges of the supporting films 2 are respectively fixed to the positions close to the upper edge of the laminate 1 , so that the supporting film 2 can be used to carry electric cores. At the same time, the inside of the two-layer board 1 has a cavity, and the opposite side of the two-layer board 1 has a liquid inlet pipe 11 and a liquid outlet pipe 12 communicating with the cavity. And the liquid inlet pipe (11) is above and the liquid outlet pipe (12) is below.

[0039] Moreover, a protruding strip 3 is installed on the opposite sides of the ...

Embodiment 2

[0041] A process for forming a mixed solid-liquid electrolyte lithium storage battery, comprising the following steps:

[0042] Step 1: Charge the cell with a temperature of 45°C, a pressure of 0.3Mpa, a constant current of 0.2C and a cut-off voltage of 3.75V;

[0043] Step 2: Place the cell treated in step 1 on the supporting film of the cold-pressing jig of Embodiment 1, and then the cold-pressing jig gently clamps the cell;

[0044] Step 3: Feed circulating saponified liquid into the cavity of the cold press fixture;

[0045] Step 4: After that, the cold-pressing jig applies pressure to the cell in stages. The first stage applies a pressure of 0.06 Mpa for 7 minutes, the second stage applies a pressure of 0.07Mpa for 15 minutes, and the third stage applies a pressure of 0.325Mpa. The time is 45 minutes.

[0046] Step 5: After the pressure is applied, take out the battery cell;

[0047] Among them, the saponified liquid is prepared by mixing 7kg of sodium petroleum sulfon...

Embodiment 3

[0051] A process for forming a mixed solid-liquid electrolyte lithium storage battery, comprising the following steps:

[0052] Step 1: Charge the cell with a temperature of 45°C, a pressure of 0.3Mpa, a constant current of 0.2C and a cut-off voltage of 3.75V;

[0053] Step 2: Place the battery cell treated in step 1 on the supporting film of the cold-pressing jig of Embodiment 1, and then the cold-pressing jig gently clamps the battery cell;

[0054] Step 3: Pass circulating deionized water into the cavity of the cold press fixture;

[0055] Step 4: Afterwards, the cold-pressing jig applies pressure to the cell in stages. The first stage applies a pressure of 0.03Mpa for 5 minutes, the second stage applies a pressure of 0.07 Mpa for 15 minutes, and the third stage applies a pressure of 0.25Mpa for a time of 5 minutes. 15 minutes;

[0056] Step 5: After the pressure is applied, take out the battery.

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Abstract

The invention discloses a cold-pressing process for a mixed solid-liquid electrolyte lithium storage battery, which relates to the field of solid-state batteries. The saponified liquid circulates inside the fixture; Step 3: Apply pressure to the battery in stages. In the process of cold pressing, the saponification liquid is used for cooling and the pressure is applied in stages, which can ensure that the gas in the package can be discharged into the air bag during the formation process of the battery, so as to improve the quality of the battery core and at the same time, It can also realize the rapid molding of the battery core.

Description

technical field [0001] The invention relates to the field of solid-state batteries, in particular to a cold-pressing process for a mixed solid-liquid electrolyte lithium storage battery. Background technique [0002] As lithium batteries play an increasingly important role in my country's energy development, the overall performance of lithium batteries still needs to be improved. In this paper, by studying the cold-pressing process after high-temperature pressurized formation of lithium batteries, the optimal cold-pressing process is found, which not only saves production costs, but also improves the overall quality of lithium batteries. [0003] The role of the cold-pressing process of high-temperature pressurized formation of lithium batteries is mainly in three aspects: one is to improve the comprehensive electrical performance and quality of lithium batteries. Specifically, the rapid cold pressure can make the contact between the positive and negative electrode material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/052
CPCH01M10/058H01M10/052Y02E60/10Y02P70/50
Inventor 许晓雄董剑张永龙蒋阳慧
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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