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Roasting box body for battery cells, and roasting method

A baking method and cell technology, applied in drying, drying machines, drying solid materials, etc., can solve the problems of poor baking effect, intensified water absorption effect, and easy water absorption, so as to ensure cooling and solve the problem of waiting for over long effect

Pending Publication Date: 2020-11-27
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

[0003] In the production and use of lithium-ion batteries, the influence of moisture on the performance of batteries is particularly important. Baking of batteries is a process that is particularly important for moisture control; at present, the production and baking of lithium-ion batteries are usually completed. Take it out of the oven to cool down or wait for natural cooling in the oven. When the former comes out of the oven, the temperature of the battery core or pole piece is high, which is prone to water absorption, especially in the room where direct air blowing cools, which will intensify the water absorption effect and lead to poor baking effect. In the case of the latter, because the existing baking equipment only has the baking function and cannot achieve the cooling effect, it waits for the natural cooling in the oven, and the waiting time of the battery core or pole pieces in the oven is too long, which seriously affects the performance of the oven. utilization, resulting in low oven utilization

Method used

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  • Roasting box body for battery cells, and roasting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A baking box for a battery cell, comprising a nitrogen gas inlet control valve 1, a nitrogen gas inlet pipe 2, an oven main body 3, a heating fixture 4, a vacuum pipe 5, a vacuum control valve 6, a cooling liquid inlet pipe 7, and a cooling liquid inlet Control valve 8, outlet coolant pipe 9, outlet coolant control valve 10, cooling fan 11, pressure relief valve 12, pressure relief passage 13 and cooling pipe 14;

[0029] The heating fixture 4 is arranged in the inner cavity of the oven main body 3 for heating the inner cavity. The lower right of the oven main body 3 is provided with a nitrogen inlet pipe 2 that communicates with the inner cavity, so The nitrogen inlet pipe 2 is provided with a nitrogen inlet control valve 1, the left side of the oven main body 3 is provided with a vacuum pipe 5 that communicates with the inner cavity, and the vacuum pipe 5 is provided with a vacuum control valve 6. , a cooling pipe 14 is installed above the inner cavity of the oven mai...

Embodiment 2

[0032] A method for baking a battery cell by using the baking box of the battery cell described in Embodiment 1, comprising the following steps:

[0033] S1. Before starting the machine, all control valves are closed, and the door of the baking box is open;

[0034] S2. Randomly select 20 cells from a batch of cells to test the water content, the average value of the positive water content is 1225PPM with a standard deviation of 73, and the average value of the negative electrode water content is 700PPM with a standard deviation of 60, and the remaining cells are placed outside the baking box to the heating fixture. In 4, after the plate loading is completed, transfer the heating fixture 4 to the inner cavity of the oven main body 3;

[0035] S3. Close the door of the sealed baking box, open the vacuum control valve 6, and continue to vacuum the inner cavity;

[0036] S4. Open the heating fixture 4 to heat and vacuum the inner cavity of the oven main body 3, and the temperatu...

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Abstract

The invention belongs to the technical field of lithium batteries, and specifically relates to a roasting box body for battery cells, and a roasting method. The roasting box body for the battery cellscomprises a nitrogen control valve, a nitrogen inlet pipeline, a roasting box main body, a heating fixture, a vacuumizing pipeline, a vacuumizing control valve, a cooling liquid inlet pipe, a coolingliquid inlet control valve, a cooling liquid outlet pipe, a cooling liquid outlet control valve, a cooling fan, a pressure release valve, a pressure release channel and a cooling pipeline. Accordingto the roasting box body for the battery cells, and the roasting method, the purpose of cooling for the roasting box is effectively achieved, battery cell cooling after roasting is ensured, and the case that the battery cells are taken out at a high temperature after being roasted or the battery cells wait for too long time in the roasting box, is effectively avoided; and the roasting efficiency for the battery cells is increased, and the problem of water absorption in a cooling process of roasting for the battery cells or pole pieces is solved.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and particularly relates to a baking box and a baking method of a battery cell. Background technique [0002] Energy shortage and environmental pollution are two major problems facing modern society. In order to alleviate the pressure on energy and the environment, the new energy electric vehicle industry has emerged as the times require. The rapid development of electric vehicles and gradually replacing fuel vehicles has become an inevitable contemporary trend. 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 process of lithium-ion batteries, the influence of moisture on the performance of cells is particularly important, and cell baking is a particularly important process for moisture control; at present, the production and baking of lithium-ion batteries are usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B11/00H01M10/058F26B25/12F26B5/04F25D1/00F26B21/14
CPCF26B11/00H01M10/058F26B25/12F26B5/04F25D1/00F26B21/14Y02E60/10Y02P70/50
Inventor 张近钢游杰黄浩白科阮江明
Owner 江西安驰新能源科技有限公司