CN210292549U - Lithium ion battery drying device - Google Patents
Lithium ion battery drying device Download PDFInfo
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- CN210292549U CN210292549U CN201921141795.2U CN201921141795U CN210292549U CN 210292549 U CN210292549 U CN 210292549U CN 201921141795 U CN201921141795 U CN 201921141795U CN 210292549 U CN210292549 U CN 210292549U
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Abstract
The utility model provides a lithium ion battery drying device applied to the technical field of lithium ion battery production and manufacture, the lithium ion battery drying device comprises a freeze-drying box (1), a vacuum system (2), a refrigerating system (3) and a heating system (4), the vacuum system (2) is communicated with the freeze-drying box (1) through a connecting pipeline, the refrigerating system (3) is communicated with the freeze-drying box (1) through a connecting pipeline, a plurality of layers of shelves (5) are arranged in the freeze-drying box (1), each layer of shelf (5) is respectively connected with the heating system (4), the vacuum system (2), the refrigerating system (3) and the heating system (4) are respectively connected with a control part, the lithium ion battery drying device of the utility model has simple structure, can effectively control the water content of the lithium ion battery in the lithium ion battery manufacturing process, and prevents the water and electrodes from generating side reaction, the battery quality is improved, the existing high-temperature drying method is replaced, the drying time and energy consumption are reduced, and the productivity is improved.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery manufacturing, more specifically say, relate to a lithium ion battery drying device.
Background
Many factors affect the performance of the lithium ion battery, such as the material type, the compaction density of the positive electrode and the negative electrode, the moisture, the coating surface density, the electrolyte consumption and the like. The moisture is a key factor which needs to be strictly controlled in the production process of the lithium ion battery, and when the moisture is excessive, not only can the lithium salt in the electrolyte be decomposed and have a certain corrosion damage effect on the anode and cathode materials and the current collector, but also the cycle performance and the safety performance of the battery are reduced. The existing drying before liquid injection of a production line adopts a high-temperature drying mode to control the water content, and the high-temperature drying mainly has two problems, namely the efficiency problem, the high-temperature drying dehydration takes longer time and the problem that the water content still exceeds the standard occasionally occurs; another problem is the energy consumption, which is long time consuming in high temperature drying and high energy consumption, and is not beneficial to cost control. In conclusion, the existing high-temperature drying method for controlling the water content before injection has defects.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the defects of the prior art, the lithium ion battery drying device is simple in structure, can effectively control the water content of the lithium ion battery in the manufacturing process of the lithium ion battery, prevents the water from generating side reaction with the electrode, improves the quality of the battery, replaces the existing high-temperature drying method, reduces the drying time and energy consumption, and improves the productivity.
To solve the technical problem, the utility model discloses the technical scheme who takes does:
the utility model relates to a lithium ion battery drying device, lithium ion battery drying device include freeze-drying case, vacuum system, refrigerating system, heating system, vacuum system pass through connecting line and freeze-drying case intercommunication, refrigerating system passes through connecting line and freeze-drying case intercommunication, freeze-drying incasement sets up multilayer shelf, every layer of shelf is connected with heating system respectively, vacuum system, refrigerating system, heating system be connected with control unit respectively.
The freeze-drying incasement multilayer shelf arrange according to from top to bottom, set up the clearance between every adjacent two-layer shelf, treat that dry battery sets up to the structure that can place on the shelf.
The freeze-drying case on set up the chamber door that can open and shut and freeze-drying case relief valve door.
The vacuum system comprises a vacuum pump and a pump pipeline, the vacuum pump is connected with a control component, the vacuum pump is communicated with the freeze-drying box through the pump pipeline, and the vacuum pump is connected with the control component which can control the vacuum pump to start and stop and adjust the vacuum pressure.
The refrigerating system comprises a refrigerating system refrigerating unit and a refrigerating system cooling calandria, the refrigerating system refrigerating unit comprises a compressor, a condenser, an expansion valve and a heat exchanger, the compressor is connected with a control part capable of controlling the compressor to start and stop, and the refrigerating system refrigerating unit is communicated with the freeze-drying box through the cooling calandria.
The heating system of the lithium ion battery drying device comprises a high-pressure water vapor air source, one end of an air source air inlet pipeline is communicated with the high-pressure water vapor air source (a vapor condenser), the other end of the air source air inlet pipeline is provided with a plurality of air source air inlet branch pipes, each air source air inlet branch pipe is communicated with a heating air inlet of a shelf in the freeze-drying box respectively, one end of an air source exhaust pipeline is communicated with the high-pressure water vapor air source, the other end of the air source exhaust pipeline is provided with a plurality of air source exhaust branch pipes, and each air source exhaust branch pipe is communicated with a heating.
The control part is composed of PLC programmable control and is divided into a manual control module and an automatic control module.
Adopt the technical scheme of the utility model, can obtain following beneficial effect:
lithium ion battery drying device, relate to one set of vacuum freeze-drying system, vacuum freeze-drying system mainly includes freeze-drying case, heating system, refrigerating system, vacuum system and control system. The freeze-drying case contain the multilayer shelf, every layer of shelf possesses the heating function respectively, can every layer of accurate control heating temperature. The drying mode of the device is to control the water content of the lithium ion battery before liquid injection. Vacuum freeze drying is a drying technique that uses the principle of sublimation to dehydrate materials. After being frozen rapidly, the lithium ion battery material is heated in a vacuum (lower than the triple point pressure of water). Because the vacuum freeze drying technology is carried out in a low-temperature and low-oxygen environment, most reactions are stopped, no liquid water exists in the treatment process, and water is directly sublimated in a solid state, so that the original structure and shape of the material are protected to the greatest extent, and finally, a high-quality dried product with both appearance and internal quality is obtained. Lithium ion battery drying device, simple structure, in lithium ion battery manufacturing process, can effective control lithium ion battery water content, prevent that moisture and electrode from taking place the side reaction, improve the battery quality, and replace current high temperature drying method, reduce drying time and energy consumption, improve the productivity.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a schematic structural diagram of a lithium ion battery drying device according to the present invention;
in the drawings, the reference numbers are respectively: 1. freeze-drying box; 2. a vacuum system; 3. a refrigeration system; 4. a heating system; 5. a shelf; 6. a freeze-drying box relief valve; 7. a vacuum pump; 8. a compressor; 9. a condenser; 10. an expansion valve; 11. a heat exchanger (evaporator); 12. a shelf temperature indicator; 13. a condensing temperature indicator; 14. a vacuum gauge; 15. a condenser air release port; 16. a vacuum pump relief port; 17. a control unit (control system).
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings, for example, the shapes, structures, mutual positions and connection relations of the components, the functions and operation principles of the components, and the like:
as shown in the accompanying drawing 1, the utility model relates to a lithium ion battery drying device, lithium ion battery drying device include freeze-drying case 1, vacuum system 2, refrigerating system 3, heating system 4, vacuum system 2 pass through connecting line and freeze-drying case 1 intercommunication, refrigerating system 3 passes through connecting line and freeze-drying case 1 intercommunication, sets up multilayer shelf 5 in the freeze-drying case 1, every layer of shelf 5 is connected with heating system 4 respectively, vacuum system 2, refrigerating system 3, heating system 4 be connected with control unit respectively. The structure relates to a set of vacuum freeze drying system, which mainly comprises a freeze drying box, a water vapor condenser (heating system), a refrigerating system, a vacuum system and a control system (control component). The freeze-drying case contain the multilayer shelf, every layer of shelf possesses the heating function respectively, can every layer of accurate control heating temperature. The drying mode of the device is to control the water content of the lithium ion battery before liquid injection. Vacuum freeze drying is a drying technique that uses the principle of sublimation to dehydrate materials. After the lithium ion battery material is quickly frozen, the lithium ion battery material is heated in a vacuum environment. Because the vacuum freeze drying technology is carried out in a low-temperature and low-oxygen environment, most reactions are stopped, no liquid water exists in the treatment process, and water is directly sublimated in a solid state, so that the original structure and shape of the material are protected to the greatest extent, and finally, a high-quality dried product with both appearance and internal quality is obtained. Lithium ion battery drying device, simple structure, in lithium ion battery manufacturing process, can effective control lithium ion battery water content, prevent that moisture and electrode from taking place the side reaction, improve the battery quality, and replace current high temperature drying method, reduce drying time and energy consumption, improve the productivity.
The lithium ion battery drying device adopts a vacuum freeze drying method, and when the method is used for vacuum freezing, the conditions are that the temperature is below-40 ℃ and the vacuum degree is below 20 Pa. Compared with the existing high-temperature drying, the method has higher water removal efficiency, and the water content can be controlled within the specification range within 1 hour; not only improves the productivity, but also greatly reduces the energy consumption. In addition, the vacuum freeze-drying does not influence the performance of the battery. In order to verify the effect of the device of the utility model, the battery before Baki ng is taken, the mode l is 333996-02CA, total 20ea, and the battery is divided into four groups, and the vacuum freeze drying experiment is respectively carried out; the test conditions were set at-45 deg.C, 20Pa vacuum, and freezing times were set to 1h, 2h, 4h, and 6h, respectively (the actual high temperature drying time of the production line was 6 h). After freeze-drying, the battery pack is taken out and packaged according to time, 1ea of each group of batteries is taken for water content testing, and the result shows that the freeze-drying time is 1h, so that the water content can be controlled in the specification (<200ppm), the production efficiency is greatly improved, and the energy consumption is saved. In addition, the battery groups are subjected to a membrane permeability test and a membrane bonding force test, and no difference is found in mass production ratio; and the battery is subjected to charge-discharge multiplying power and cycle performance tests, and the comparison with the mass production shows that the battery has no obvious difference, namely the vacuum freezing drying method has no influence on the battery performance.
The freeze-drying box 1 is internally provided with a plurality of layers of shelves 5 which are arranged up and down, a gap is arranged between every two adjacent layers of shelves 5, and the battery to be dried is arranged into a structure capable of being placed on the shelves 5. In the structure, each layer of the partition plate respectively heats the batteries placed on the shelf plate, and the control is realized, and the regulation is realized by controlling the high-pressure water vapor source (water vapor condenser) by the control part.
The freeze-drying box 1 is provided with a box door capable of being opened and closed and a freeze-drying box relief valve 6.
Refrigerating system 3 include refrigerating system refrigerating unit and refrigerating system cooling calandria, refrigerating system refrigerating unit includes compressor 8, condenser 9, expansion valve 10, heat exchanger 11, compressor 8 with can control the control unit that compressor 8 opened and stops be connected, refrigerating system refrigerating unit passes through the cooling calandria and communicates with freeze-drying case 1. The refrigerating system is composed of four basic components of a refrigerating compressor, a condenser, a throttle valve and an evaporator. The refrigerant continuously circulates and flows in the system, changes state, exchanges heat with the outside and provides refrigeration for the freeze-drying box.
Lithium ion battery drying device's heating system 4 include high pressure vapor gas source, air supply air inlet pipeline one end and high pressure vapor gas source (steam condenser) intercommunication, the air supply air inlet pipeline other end sets up a plurality of air supply air inlet branch pipes, every air supply air inlet branch pipe respectively with freeze-drying incasement a shelf 5's heating air inlet intercommunication, air supply exhaust pipeline one end and high pressure vapor gas source intercommunication, the air supply exhaust pipeline other end sets up a plurality of air supply exhaust branch pipes, every air supply exhaust branch pipe respectively with freeze-drying incasement a shelf 5's heating gas vent intercommunication. The heating system adopts radiation heat transfer, and high-pressure steam is used as a heat source, so that the supply and the regulation of the heat source are realized.
The control part is composed of PLC programmable control and is divided into a manual control module and an automatic control module. The above structure, automatic and manual, can be selected according to the need.
Lithium ion battery drying device, relate to one set of vacuum freeze-drying system, vacuum freeze-drying system mainly includes freeze-drying case, heating system, refrigerating system, vacuum system and control system. The freeze-drying case contain the multilayer shelf, every layer of shelf possesses the heating function respectively, can every layer of accurate control heating temperature. The drying mode of the device is to control the water content of the lithium ion battery before liquid injection. Vacuum freeze drying is a drying technique that uses the principle of sublimation to dehydrate materials. After being frozen rapidly, the lithium ion battery material is heated in a vacuum (lower than the triple point pressure of water). Because the vacuum freeze drying technology is carried out in a low-temperature and low-oxygen environment, most reactions are stopped, no liquid water exists in the treatment process, and water is directly sublimated in a solid state, so that the original structure and shape of the material are protected to the greatest extent, and finally, a high-quality dried product with both appearance and internal quality is obtained. Lithium ion battery drying device, simple structure, in lithium ion battery manufacturing process, can effective control lithium ion battery water content, prevent that moisture and electrode from taking place the side reaction, improve the battery quality, and replace current high temperature drying method, reduce drying time and energy consumption, improve the productivity.
The present invention has been described in detail with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and the present invention can be implemented in various ways without modification, and the present invention is not limited by the above embodiments.
Claims (7)
1. A lithium ion battery drying device is characterized in that: lithium ion battery drying device include freeze-drying case (1), vacuum system (2), refrigerating system (3), heating system (4), vacuum system (2) through connecting line and freeze-drying case (1) intercommunication, refrigerating system (3) through connecting line and freeze-drying case (1) intercommunication, set up multilayer shelf (5) in freeze-drying case (1), every layer of shelf (5) is connected with heating system (4) respectively, vacuum system (2), refrigerating system (3), heating system (4) be connected with control unit respectively.
2. The lithium ion battery drying apparatus according to claim 1, characterized in that: the freeze-drying box (1) is internally provided with a plurality of layers of shelves (5) which are arranged up and down, a gap is arranged between every two adjacent layers of shelves (5), and the battery to be dried is arranged into a structure capable of being placed on the shelves (5).
3. The lithium ion battery drying apparatus according to claim 1 or 2, characterized in that: the freeze-drying box (1) is provided with a box door capable of being opened and closed and a freeze-drying box relief valve (6).
4. The lithium ion battery drying apparatus according to claim 1 or 2, characterized in that: vacuum system (2) include vacuum pump (7) and pump line, vacuum pump (7) are connected with control unit, vacuum pump (7) pass through pump line and freeze-drying case (1) intercommunication, vacuum pump (7) with can control vacuum pump (7) to open and stop and vacuum pressure size control unit is connected.
5. The lithium ion battery drying apparatus according to claim 1 or 2, characterized in that: refrigerating system (3) including refrigerating system refrigerating unit and refrigerating system cooling calandria, refrigerating system refrigerating unit includes compressor (8), condenser (9), expansion valve (10), heat exchanger (11), compressor (8) with can control compressor (8) and open the control unit who stops and be connected, refrigerating system refrigerating unit is through cooling calandria and freeze-drying case (1) intercommunication.
6. The lithium ion battery drying apparatus according to claim 1 or 2, characterized in that: lithium ion battery drying device's heating system (4) include high pressure vapor gas source, air supply air inlet pipeline one end and high pressure vapor gas source intercommunication, the air supply air inlet pipeline other end sets up a plurality of air supply air inlet branch pipes, every air supply air inlet branch pipe respectively with the heating air inlet intercommunication of a shelf (5) in freeze-drying case (1), air supply exhaust pipeline one end and high pressure vapor gas source intercommunication, the air supply exhaust pipeline other end sets up a plurality of air supply exhaust branch pipes, every air supply exhaust branch pipe respectively with the heating gas vent intercommunication of a shelf (5) in freeze-drying case (1).
7. The lithium ion battery drying apparatus according to claim 1 or 2, characterized in that: the control part is composed of PLC programmable control and is divided into a manual control module and an automatic control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921141795.2U CN210292549U (en) | 2019-07-19 | 2019-07-19 | Lithium ion battery drying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921141795.2U CN210292549U (en) | 2019-07-19 | 2019-07-19 | Lithium ion battery drying device |
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| CN210292549U true CN210292549U (en) | 2020-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077209A (en) * | 2022-06-29 | 2022-09-20 | 厦门海辰新能源科技有限公司 | Drying system, method for freeze drying battery core, production process of battery and battery |
| CN115560547A (en) * | 2022-03-04 | 2023-01-03 | 深圳力士智造科技有限公司 | Deep drying method for lithium battery |
-
2019
- 2019-07-19 CN CN201921141795.2U patent/CN210292549U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115560547A (en) * | 2022-03-04 | 2023-01-03 | 深圳力士智造科技有限公司 | Deep drying method for lithium battery |
| CN115077209A (en) * | 2022-06-29 | 2022-09-20 | 厦门海辰新能源科技有限公司 | Drying system, method for freeze drying battery core, production process of battery and battery |
| CN115077209B (en) * | 2022-06-29 | 2023-09-08 | 厦门海辰储能科技股份有限公司 | Drying system, method for freeze-drying battery cell, production process of battery and battery |
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