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Lithium ion battery pole piece baking device and baking method

A lithium-ion battery and baking device technology, which is applied in the direction of heating devices, drying, drying machines, etc., can solve the problems of prolonging the time occupied by the pole piece in the oven, high energy consumption costs, and occupying a large workshop area. Achieve the effect of improving heat utilization rate, reducing baking time and high equipment utilization rate

Pending Publication Date: 2021-09-21
SHENZHEN HONCELL ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, ovens are mainly used to bake the pole pieces in the industry. In order to ensure the baking effect and accelerate the baking process, high-temperature baking is generally used with a built-in fan or a vacuum pumping method. It is more sensitive, and it is not allowed to set an excessively high temperature for baking, so that the baking effect is very bad, and the baking process takes a long time
Moreover, after high-temperature baking, in order to avoid the formation of water vapor on the surface of the pole piece when the high-temperature pole piece is cooled instantly when it is taken out, it is necessary to wait for the oven to cool to close to room temperature after the baking is completed before taking it out, and the pole piece takes up much time in the oven. Extended, low equipment utilization, limiting capacity allocation
In order to meet the production capacity needs, some enterprises have equipped a large number of ovens, occupying a large amount of workshop area; in addition, during the working process of high-temperature ovens, the heat is directly emitted into the environment, resulting in huge energy waste and high energy consumption costs.

Method used

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  • Lithium ion battery pole piece baking device and baking method

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Embodiment 1

[0030] Such as figure 1 As shown, the present invention discloses a lithium-ion battery pole piece baking device, which includes a box body 100 and a box door 200. The box body 100 is provided with a convection cavity, and both ends of the convection cavity are provided with a box door. 200; a high-temperature baking zone 105 is set in the middle of the convection cavity, a medium-temperature baking zone 103 is set at both ends of the high-temperature baking zone 105, and a low-temperature baking zone 101 is set at the other end of the transitional baking zone.

[0031] In this embodiment, the bottom of the box is provided with a material moving track 300 that runs through the high-temperature baking zone 105, the medium-temperature baking zone 103, and the low-temperature baking zone 101, and pole piece trays corresponding to different temperature zones are movable on the moving track 300 302. Generally speaking, the moving track is built in the bottom of the box, and the mo...

Embodiment 2

[0038] Another aspect of the present invention is to protect the baking method of the lithium-ion battery pole pieces of the above-mentioned baking device, comprising the following steps:

[0039] S1. Initial baking: Load the lithium-ion battery pole pieces that need to be baked on the three pole piece trays, and then place the adjacent ones on the moving track respectively in the high-temperature baking area, medium-temperature baking area, and low-temperature baking area. position, close the doors at both ends, set the heating tube in the starting box to work and start the initial baking;

[0040] S2. The first shift baking: After the initial baking is completed, the three electrode trays move forward synchronously, and the electrode trays in the previous high-temperature baking area are moved to the opposite medium-temperature baking area. The electrode tray in the low-temperature baking area is moved to the high-temperature baking area, and the electrode tray in the original...

Embodiment 3

[0045] In the present invention, in order to ensure the full use of heat and reduce the loss of heat, the pole piece trays adjacent to each other are arranged on the moving track in gaps. The positions are corresponding. After the sequence-changing baking is completed, the door at the feed end, the first isolation plate, and the second isolation plate are all closed, and then the door at the output end is opened to take out the pole piece tray in the low-temperature baking area; then close the output end. The box door at the material end, open the first isolation plate and the second isolation plate, and move the pole piece tray in the box forward along the moving track to realize the temperature zone change; then close the first isolation plate and the second isolation plate, and open the feeding Put the new electrode tray in the low-temperature baking area.

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Abstract

The invention discloses a lithium ion battery pole piece baking device and baking method. The device comprises a box body and box doors and is characterized in that a convection type cavity is formed in the box body, and the box doors are arranged at the two ends of the convection type cavity; and a high-temperature baking area is arranged in the middle of the convection type cavity, medium-temperature baking areas are arranged at the two ends of the high-temperature baking area, and a low-temperature baking area is arranged at the other end of a transition baking area. The device and the method have the characteristics of low energy consumption cost, good baking effect, short baking time and high equipment utilization rate.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery preparation, in particular to a lithium-ion battery pole piece baking device and a baking method. Background technique [0002] There are many factors that affect the performance of lithium batteries, such as the type of material, the compacted density of positive and negative electrodes, moisture, coating surface density, and the amount of electrolyte used. Among them, moisture has a crucial impact on the performance of lithium-ion batteries. Moisture is a key factor that needs to be strictly controlled in the production process of lithium-ion batteries. Excessive moisture will not only lead to the decomposition of lithium salts in the electrolyte, but also affect the positive and negative materials, Current collectors have a certain corrosion and damage effect, and also lead to the reduction of battery cycle performance and safety performance. Therefore, pole piece baking is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B15/14F26B25/12F26B21/00F26B25/18F26B23/04
CPCF26B15/14F26B25/12F26B21/004F26B25/18F26B23/04
Inventor 范海满肖文杰吴银华师贵荣肖友坤
Owner SHENZHEN HONCELL ENERGY CO LTD
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