CN211400523U - Battery cell vacuum drying device - Google Patents
Battery cell vacuum drying device Download PDFInfo
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- CN211400523U CN211400523U CN201921897774.3U CN201921897774U CN211400523U CN 211400523 U CN211400523 U CN 211400523U CN 201921897774 U CN201921897774 U CN 201921897774U CN 211400523 U CN211400523 U CN 211400523U
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Abstract
The utility model discloses a vacuum drying device for battery cell, which comprises a vacuum baking box, a vacuum pump and a gas input component; the vacuum baking oven comprises a sealable baking chamber and a display unit arranged on the outer wall of the vacuum baking oven, a plurality of baking stations and a temperature measuring assembly are arranged in the baking chamber, and the temperature measuring assembly is electrically connected with the display unit; the gas input component comprises a gas transmission pump and a gas storage tank, and the gas outlet end of the gas transmission pump is communicated with the baking chamber; the air inlet end of the vacuum pump is communicated with the baking chamber; the air outlet end of the vacuum pump is communicated with the outside through a first air valve and is communicated with the air storage tank through a second air valve. The utility model utilizes the inverse relation between the boiling point and the vacuum degree of water in the vacuum state, improves the baking vacuum degree of the battery cell through the vacuum pump, thereby reducing the boiling point of water in the vacuum environment, improving the vaporization efficiency of water, and simultaneously, taking away water vapor through introducing gas, improving the baking efficiency; meanwhile, the gas can be recycled by opening and closing different gas valves, so that the cost is saved.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a dry technical field of battery especially relates to a battery electricity core vacuum drying device.
[ background of the invention ]
At present, the most important control points of the manufacturing process in the lithium battery industry are three major factors of moisture, aging and dust, wherein the most important control points are the control of the moisture, and due to the fact that the excessive moisture in the battery cell influences the excessive charging and discharging pressure in the battery cell, the battery cell is broken and opened to cause leakage, and the performance values of the battery cell such as large internal resistance, low capacity and poor circulation of the battery cell are low.
At present, the conventional lithium battery manufacturers generally adopt a vacuum oven to bake the battery cell, the baking efficiency of the lithium battery cell is greatly influenced by temperature, vacuum degree and time, the higher the temperature is, the faster the moisture evaporation rate is, the higher the baking efficiency is, but the too high temperature can cause the diaphragm in the lithium battery to be heated and shrunk, so that the short circuit of the battery is poor; in addition, the baking vacuum degree in the prior art is only controlled below-85 Kpa, the effect of improving the baking efficiency is limited, and meanwhile, the resources during baking cannot be effectively recycled, so that waste is caused, and the cost is increased.
In view of the above, it is desirable to provide a vacuum drying device for battery cells to overcome the above-mentioned drawbacks.
[ Utility model ] content
The utility model aims at providing a battery electricity core vacuum drying device aims at improving the higher problem of current battery drying device baking temperature, has promoted and has toasted efficiency, has reduced drying temperature, has promoted the performance of battery electricity core, and the cost has been saved to gaseous can used repeatedly simultaneously.
In order to achieve the above object, the utility model provides a battery cell vacuum drying device, which comprises a vacuum baking oven, a vacuum pump and a gas input assembly; the vacuum baking oven comprises a sealable baking chamber and a display unit arranged on the outer wall of the vacuum baking oven, a plurality of baking stations and a temperature measuring assembly are arranged in the baking chamber, and the temperature measuring assembly is electrically connected with the display unit in a wired or wireless manner; the gas input assembly comprises a gas transmission pump and a gas storage tank connected with the gas inlet end of the gas transmission pump, the gas outlet end of the gas transmission pump is communicated with the baking chamber, and a filter screen is arranged in the gas storage tank; the air inlet end of the vacuum pump is communicated with the baking chamber; the air outlet end of the vacuum pump is communicated with the outside through a first air valve and is communicated with the air storage tank through a second air valve, and the first air valve and the second air valve can control air to flow.
In a preferred embodiment, a heating and moisture absorbing unit is provided in the gas storage tank.
In a preferred embodiment, a third air valve is arranged between the air delivery pump and the baking chamber.
In a preferred embodiment, a fourth gas valve is provided between the vacuum pump and the baking chamber.
In a preferred embodiment, a vacuum degree detection unit is arranged in the baking chamber, and the vacuum degree detection unit is electrically connected with the display unit through wires or wirelessly.
In a preferred embodiment, a humidity detection unit is disposed in the baking chamber, and the humidity detection unit is electrically connected to the display unit through a wire or wirelessly.
In a preferred embodiment, each baking station is provided with a heating unit, and a switch of each heating unit is independently controlled.
In a preferred embodiment, the gas stored in the gas container is nitrogen or a noble gas.
The utility model utilizes the inverse relation between the boiling point and the vacuum degree of water in the vacuum state, improves the baking vacuum degree of the battery core through the vacuum pump, thereby reducing the boiling point of water in the vacuum environment, improving the vaporization efficiency of water, simultaneously takes away water vapor through introducing gas, can quickly evaporate and discharge the water in the battery core when not improving the baking temperature, and improves the baking efficiency; meanwhile, the gas can be recycled by opening and closing different gas valves, so that the cost is saved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
Fig. 1 is the utility model provides a battery cell vacuum drying device's schematic structure diagram.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.
Referring to fig. 1, in an embodiment of the present invention, a battery cell vacuum drying apparatus 100 is provided, which can bake and dry a battery cell placed therein, so as to promote evaporation and discharge of moisture in the battery cell, and reduce water content in the battery cell.
The battery cell vacuum drying device 100 comprises a vacuum baking box 10, a gas input assembly 20 and a vacuum pump 30; the vacuum baking oven 10 is used for providing a baking platform and comprises a power supply system, a control system, a baking system and the like; the gas input component 20 inputs dry gas into the vacuum baking oven 10 to take away water vapor evaporated in the vacuum baking oven 10; the vacuum pump 30 is used for pumping away the gas in the vacuum baking oven 10, creating a near vacuum environment, and reducing the boiling point of the liquid water in the near vacuum environment.
In the embodiment of the present invention, the vacuum baking oven 10 includes a sealable baking chamber 11 and a display unit 12 disposed on the outer wall of the vacuum baking oven 10, the baking chamber 11 can maintain the internal temperature within a temperature range, such as 85 ± 3 ℃, for a long time, and particularly, an over-temperature protection device (not shown in the figure) is disposed, and when a temperature threshold is exceeded, the heating is automatically stopped; when the baking chamber 11 is opened, the battery cell to be baked is put in, and then the battery cell is closed and sealed to form an airtight cavity; the display unit 12 can display parameters and operation interfaces of relevant detection devices (such as temperature, humidity, time, etc.) of the battery cell vacuum drying device 100, so that an operator can more conveniently master the baking progress. A plurality of baking stations 111 for placing battery cells for processing and a temperature measuring component 112 for measuring the internal temperature of the baking chamber 11 are arranged in the baking chamber 11, and the temperature measuring component 112 is electrically connected with the display unit 12 in a wired or wireless manner, so that the measured temperature is displayed on the display unit 12 in real time.
Further, in an embodiment, each baking station 111 is provided with a heating unit 1111, a switch of each heating unit 1111 is independently controlled, and when a battery cell to be processed is placed in the baking station 111, the heating unit 1111 of the baking station 111 independently heats the battery cell, so that the temperature of the battery cell is raised to a predetermined temperature as soon as possible, thereby improving the heating efficiency and saving energy.
Further, in an embodiment, a humidity detection unit 113 is disposed in the baking chamber 11, and the humidity detection unit 113 is electrically connected to the display unit 12 through a wire or wirelessly for detecting the moisture content in the baking chamber 11 in the vacuum baking chamber 10, so as to control the moisture content value in the battery cell in a relatively low range, typically below 300 PPM.
The utility model discloses an in the embodiment, gaseous input subassembly 20 includes gas transmission pump 21 and the gas holder 22 of being connected with the inlet end of gas transmission pump 21, gas transmission pump 21 give vent to anger end and baking chamber 11 intercommunication, the dry gas has been stored in the gas holder 22, go into baking chamber 11 with the gas pump through gas transmission pump 21, the vapor of battery electricity core evaporation is taken away in the flow through gas, in this embodiment, this gas is nitrogen gas or noble gas, according to the difficult characteristic that takes place chemical reaction of nitrogen gas or noble gas, thereby avoid with the diaphragm in the battery electricity core, the pole piece, electrolyte etc. take place the reaction, influence battery life.
Further, in an embodiment, the heating moisture absorption unit 221 is disposed in the air storage tank 22, and can dry, absorb and heat (for example, about 85 ℃) the moisture in the air storage tank 22, so as to avoid bringing additional moisture into the baking chamber 11 when inflating the baking chamber 11, thereby reducing the baking efficiency, and the preheating of the air can also avoid a great reduction in the temperature of the baking chamber 11 when the low-temperature air enters the baking chamber 11, so that the evaporated moisture is re-phase-changed into a liquid state, thereby reducing the baking efficiency.
In the embodiment of the present invention, the air inlet of the vacuum pump 30 is communicated with the baking chamber 11; the air outlet end is communicated with the outside through a first air valve 101, and is communicated with the air storage tank 22 through a second air valve 102, and the first air valve 101 and the second air valve 102 can control the air flow. Specifically, the vacuum pump 30 is used for pumping the baking chamber 11, the sealed vacuum degree of the baking chamber 11 after pumping can reach-0.09 mpa, according to the inverse ratio relation between the vacuum degree and the liquid boiling point, the higher the gas vacuum degree in the baking chamber 11 is, the lower the boiling point of the liquid is, and when the vacuum degree reaches-0.09 mpa, the boiling point of the liquid water is lower than 85 ℃, so that the effect of fully evaporating the water in the battery cell on the premise of maintaining the lower baking temperature is realized, and the battery cell is prevented from being damaged by high temperature.
When the first air valve 101 is opened and the second air valve 102 is closed, the vacuum pump 30 pumps out air in the baking chamber 11 and exhausts the air to the outside; when the baking chamber 11 finishes baking and fills in the gas (for example, nitrogen) of the gas storage tank 22, the first gas valve 101 is closed and the second gas valve 102 is opened, the vacuum pump 30 pumps out the gas in the baking chamber 11 and conveys the gas storage tank 22, the recycling of the gas in the gas storage tank 22 is realized, the waste is avoided, the cost is saved, in the embodiment, a filter screen 222 is arranged in the gas storage tank 22, the gas conveyed to the gas storage tank 22 by the vacuum pump 30 needs to pass through the filter screen 222 when being output through the gas transmission pump 21, the filter screen 222 filters the gas, dust particles and the like in the adsorbed gas are absorbed, the dust particles and the like mixed in the gas are prevented from entering the battery core in the baking chamber 11, thereby causing damage, wherein, the filter screen can be one.
Further, a third air valve 103 is arranged between the air delivery pump 21 and the baking chamber 11, so that the air delivery rate and the opening and closing state of the air delivery pump 21 to the baking chamber 11 can be controlled, the whole air delivery process is more controllable, the air tightness of the baking chamber 11 is reinforced, and the safety risk is reduced.
Furthermore, a fourth air valve 104 is arranged between the vacuum pump 30 and the baking chamber 11, and the air tightness of the baking chamber 11 can be reinforced by the fourth air valve 104, so that the gas is prevented from flowing back to the baking chamber 11 from the vacuum pump 30, and the baking efficiency is improved.
The principle of the utility model is that: 1: placing the battery cell into a baking station 111 in a baking box 11 of the vacuum baking box 10, and then, air-sealing the baking chamber 11; 2: the temperature in the baking chamber 11 is raised to 85 ℃; opening the first air valve 101 and closing the second air valve 102, and pumping air from the baking chamber 11 by the vacuum pump 30 to make the vacuum degree within-0.09 mpa; 3: keeping the constant vacuum degree and temperature of the baking chamber 11, and baking for 3 to 5 hours; 4: gas is introduced into the vacuum baking box 10 through the gas input assembly 20, so that the baking chamber 11 is vacuumized to normal pressure, and the gas is kept introduced for heating for 40-60 min; 5: closing the first air valve 101 and opening the second air valve 102, evacuating the baking box 11 by the vacuum pump 30 to enable the vacuum degree to be within-0.09 mpa, inputting the evacuated air into the air storage tank 22, and baking for 3-5 hours; 6: the gas input assembly 20 introduces dry gas into the baking chamber 11, so that the baking chamber 11 is vacuumized to normal pressure, the moisture content is tested by cooling, and if the moisture content reaches the standard, the battery cell is taken out and sealed; if the standard is not met, the steps are continuously repeated.
The utility model utilizes the inverse relation between the boiling point and the vacuum degree of water in the vacuum state, improves the baking vacuum degree of the battery cell through the vacuum pump 30, thereby reducing the boiling point of water in the vacuum environment, improving the vaporization efficiency of water, simultaneously takes away water vapor through introducing gas, can quickly evaporate and discharge the water in the battery cell when not improving the baking temperature, and improves the baking efficiency; meanwhile, the gas can be recycled by opening and closing different gas valves, so that the cost is saved.
The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (8)
1. A vacuum drying device for battery cores is characterized by comprising a vacuum baking box, a vacuum pump and a gas input assembly; the vacuum baking oven comprises a sealable baking chamber and a display unit arranged on the outer wall of the vacuum baking oven, a plurality of baking stations and a temperature measuring assembly are arranged in the baking chamber, and the temperature measuring assembly is electrically connected with the display unit in a wired or wireless manner; the gas input assembly comprises a gas transmission pump and a gas storage tank connected with the gas inlet end of the gas transmission pump, the gas outlet end of the gas transmission pump is communicated with the baking chamber, and a filter screen is arranged in the gas storage tank; the air inlet end of the vacuum pump is communicated with the baking chamber; the air outlet end of the vacuum pump is communicated with the outside through a first air valve and is communicated with the air storage tank through a second air valve, and the first air valve and the second air valve can control air to flow.
2. The battery cell vacuum drying apparatus of claim 1, wherein a heating and moisture absorbing unit is disposed in the air storage tank.
3. The battery cell vacuum drying apparatus of claim 1, wherein a third air valve is disposed between the air delivery pump and the baking chamber.
4. The battery cell vacuum drying apparatus of claim 1, wherein a fourth air valve is disposed between the vacuum pump and the baking chamber.
5. The battery cell vacuum drying device of claim 1, wherein a vacuum degree detection unit is disposed in the baking chamber, and the vacuum degree detection unit is electrically connected to the display unit through a wire or wirelessly.
6. The battery cell vacuum drying apparatus of claim 1, wherein a humidity detection unit is disposed in the baking chamber, and the humidity detection unit is electrically connected to the display unit through a wire or wirelessly.
7. The battery cell vacuum drying apparatus of claim 1, wherein each baking station is provided with a heating unit, and a switch of each heating unit is independently controlled.
8. The battery cell vacuum drying apparatus of claim 1, wherein the gas stored in the gas storage tank is nitrogen or a noble gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897774.3U CN211400523U (en) | 2019-11-05 | 2019-11-05 | Battery cell vacuum drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897774.3U CN211400523U (en) | 2019-11-05 | 2019-11-05 | Battery cell vacuum drying device |
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| Publication Number | Publication Date |
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| CN211400523U true CN211400523U (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921897774.3U Active CN211400523U (en) | 2019-11-05 | 2019-11-05 | Battery cell vacuum drying device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915956A (en) * | 2021-10-13 | 2022-01-11 | 大冶市兴进铝业有限公司 | Section bar drying device |
| CN114136058A (en) * | 2021-12-13 | 2022-03-04 | 上海德瀛睿创半导体科技有限公司 | Drying equipment and processing system |
-
2019
- 2019-11-05 CN CN201921897774.3U patent/CN211400523U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915956A (en) * | 2021-10-13 | 2022-01-11 | 大冶市兴进铝业有限公司 | Section bar drying device |
| CN114136058A (en) * | 2021-12-13 | 2022-03-04 | 上海德瀛睿创半导体科技有限公司 | Drying equipment and processing system |
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Address after: 523000 buildings C and D, No.18 zhongkeng Road, Sanzhong village, Qingxi Town, Dongguan City, Guangdong Province Patentee after: Dongguan Langtaitong Technology Co.,Ltd. Address before: 523000 buildings C and D, No.18 zhongkeng Road, Sanzhong village, Qingxi Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN WOTAITONG NEW ENERGY Co.,Ltd. |
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