Wet-method lithium battery diaphragm back cooling process

A lithium battery diaphragm and cooling process technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of excessive industrial exhaust fume concentration, high-efficiency cooling, etc. The effect of improving the internal resistance of the diaphragm

Pending Publication Date: 2022-05-10
SINOMA LITHIUM BATTERY SEPARATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing backside cooling system cannot efficiently cool the backside of the diaphragm, and the generated industrial waste gas cannot be actively discharged and treated, resulting in excessive oil fume concentration. The backside cooling process of the wet lithium battery separator; this process realizes the improvement of the peeling strength after the backside of the separator is coated, and the stable and comprehensive treatment of the discharge of industrial waste gas at the same time

Method used

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  • Wet-method lithium battery diaphragm back cooling process
  • Wet-method lithium battery diaphragm back cooling process
  • Wet-method lithium battery diaphragm back cooling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The filter equipment 11 filters the air, and then sets the air supply volume of a single high-voltage variable frequency air supply fan 12 to 500m³ / h, then cools through the cooling device 2 and supplies constant temperature and quantitative cooling clean high-pressure air through the air volume distribution device 3, and then passes through The diaphragm cooling device 4 performs cooling verification on the back of the diaphragm, and at the same time sets the exhaust air volume of the high-voltage variable frequency exhaust fan 52 to 6500m³ / h, and extracts the industrial waste gas through the exhaust port 414 of the back cooling cover assembly 41, and transports it to the oil fume treatment equipment 51 Purify, discharge through the chimney 53 up to the standard, and finally perform data detection on the peel strength on the back of the diaphragm.

Embodiment 2

[0067] The difference between this embodiment and Embodiment 1 is that in this embodiment, the air supply volume of a single high-voltage variable frequency air supply fan 12 is set to 1000m³ / h, other operations are the same as in Embodiment 1, and then the peel strength on the back of the diaphragm is detected .

Embodiment 3

[0069] The difference between this embodiment and Embodiment 1 is that in this embodiment, the air supply volume of a single high-voltage variable-frequency air supply fan 12 is set to 1500m³ / h, other operations are the same as in Embodiment 1, and then the peel strength on the back of the diaphragm is tested for data .

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PUM

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Abstract

The invention discloses a wet-process lithium battery diaphragm back cooling process. The process comprises the following steps: A, cleaning and filtering air adopted for back cooling, and pressurizing to send out clean high-pressure air; b, the clean high-pressure air is cooled into cooled clean high-pressure air at the set temperature; c, quantitatively distributing the cooled clean high-pressure air and supplying the cooled clean high-pressure air to each air inlet pipe of the back cooling cover assembly; d, each air knife of the back cooling cover assembly blows out quantitatively distributed cooling clean high-pressure air to the back surface of the diaphragm; and E, the industrial waste gas treatment device extracts the industrial waste gas containing oil smoke released when the back face of the diaphragm is cooled from an exhaust outlet of the back cooling cover assembly, and the industrial waste gas is discharged into the atmosphere after standard treatment. According to the process, the cooling efficiency of the back of the diaphragm can be improved, and industrial waste gas can be discharged up to the standard, so that the stripping strength of the back of the diaphragm is effectively improved; by improving the microstructure of the non-roller-attached surface of the diaphragm, the air permeability of the diaphragm is reduced, the internal resistance of the diaphragm is improved, and the rate performance of the battery is favorably improved.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a backside cooling process of a wet-process lithium battery diaphragm for improving the stripping force of the backside of the diaphragm and treating oil fume. Background technique [0002] The backside cooling system is a solution to improve the consistency of both sides of the wet-process lithium battery separator. When the cooling effect of the separator is poor, the peeling strength of the coating film will decrease, and the coating will fall off. Among them, it affects the cleanliness of the winding space, which in turn affects the short-circuit rate of the Hipot test after the pole core is hot-pressed. If the peeling strength of the coating film is lower, the coating will fall off, which will affect the winding process of the battery, and after the pole core is injected into the shell, the coating will fall off, which will directly affect the electrical perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403
CPCH01M50/403
Inventor 夏伟张绪杰张影何健杨万里盛关董有龙骆志刚白耀宗
Owner SINOMA LITHIUM BATTERY SEPARATOR CO LTD
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