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Method for quickly drying and cooling lithium ion battery

A lithium-ion battery, rapid drying technology, applied in the direction of drying solid materials, drying solid materials without heating, drying, etc., can solve problems such as battery fragments easily hurting people, batteries are dangerous, battery leakage, etc., and shorten the heating time. and cooling time, improve process efficiency, and save production costs

Inactive Publication Date: 2017-06-16
HUIZHOU WES NEW ENERGY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the moisture is too high, the electrolyte will react with the moisture to generate a small amount of harmful gas, which will have a negative impact on the environment of the liquid injection room; this will also affect the quality of the electrolyte itself, making the battery performance poor
[0014] (2) The internal pressure of the battery is too high
When the internal pressure is even higher, the battery will be in danger. The explosion will cause the electrolyte to splash, and the battery fragments will easily hurt people.
[0016] (3) High internal resistance
[0018] (4) Large self-discharge
[0020] (5) Low capacity
[0022] (6) Battery leakage
[0025] The existing methods of baking and cooling the battery cells are as follows: vacuuming does not use medium, which reduces the speed of reaching the set temperature, and the temperature in the sealed box is uneven, resulting in long baking time and large space occupation

Method used

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  • Method for quickly drying and cooling lithium ion battery
  • Method for quickly drying and cooling lithium ion battery

Examples

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Effect test

Embodiment 1

[0057] The invention discloses a rapid drying and cooling method for a lithium ion battery. The lithium ion battery is placed in an oven, and the heat transfer medium is an inert gas;

[0058] The heating steps are as follows: when heating, fill in inert gas for 40 minutes, keep heating for 6.5 hours, then vacuumize, and cycle accordingly;

[0059] The cooling steps are as follows: stop heating, fill with inert gas for 10 minutes, keep it for 6 hours, then evacuate, and so on.

[0060] In this embodiment, the temperature of the inert gas filled during heating is 40°C; the temperature of the inert gas filled during cooling is -20°C. The inert gas is nitrogen. The number of cycles during heating was 10 times. , the number of cycles during cooling is 5 times.

Embodiment 2

[0062] The invention discloses a rapid drying and cooling method for a lithium ion battery. The lithium ion battery is placed in an oven, and the heat transfer medium is an inert gas;

[0063] The heating steps are as follows: fill in inert gas for 25 minutes during heating, keep heating for 1 hour, then evacuate, and cycle accordingly;

[0064] The cooling steps are as follows: stop heating, fill with inert gas for 40 minutes, keep it for 3.25 hours, and then evacuate, and so on.

[0065] In this embodiment, the temperature of the inert gas filled during heating is 50° C.; the temperature of the inert gas filled during cooling down is 40° C. The inert gas is nitrogen. The number of cycles during heating was 5 times. , the number of cycles during cooling is 1 time.

Embodiment 3

[0067] The invention discloses a rapid drying and cooling method for a lithium ion battery. The lithium ion battery is placed in an oven, and the heat transfer medium is an inert gas;

[0068] The heating steps are: fill in inert gas for 10 minutes during heating, keep heating for 12 hours, then vacuumize, and cycle accordingly;

[0069] The cooling steps are as follows: stop heating, fill with inert gas for 25 minutes, keep it for 0.5 hours, and then evacuate, and so on.

[0070] In this embodiment, the temperature of the inert gas filled during heating is 60°C; the temperature of the inert gas filled during cooling down is -30°C. The inert gas is nitrogen. The number of cycles during heating was 1 time. , the number of cycles during cooling is 10 times.

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Abstract

The invention discloses a method for quickly drying and cooling a lithium ion battery. The lithium ion battery is placed in an oven, and the heat transfer medium is inert gas. Heating steps comprise the steps of inflating the lithium ion battery with inert gas for 10-40 min during heating, maintaining the state for 1-12 h and performing heating, performing vacuumizing, and performing circulation hereunder. Cooling steps include the steps of stopping heating, inflating the lithium ion battery with inert gas for 10-40 min, maintaining the state for 0.5-6 h, performing vacuumizing, and performing circulation hereunder. The method for quickly drying and cooling the lithium ion battery has the advantages of being quick in heating speed, high in cooling efficiency and low in cost.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a rapid drying and cooling method for lithium ion batteries. Background technique [0002] Lithium-ion battery is a kind of battery with carbon material as the negative electrode and lithium-containing compound as the positive electrode. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon as the negative electrode has a layered structure with many micropores, and the lithium ions reaching the negative electrode are embedded in the micropores of the carbon layer. Similarly, when the battery is discharged (that is, the process in which we use the battery), the lithium ions embedded in the carbon layer of the negative electrode come out and move back to the positive electrode. During the charging and discharging process, lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B5/04F26B25/00
CPCF26B5/04F26B25/00
Inventor 肖世玲宋金涛龙梅黄云
Owner HUIZHOU WES NEW ENERGY LIMITED
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