CN114221098A - Controllable negative pressure automatic sealing method for battery - Google Patents
Controllable negative pressure automatic sealing method for battery Download PDFInfo
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- CN114221098A CN114221098A CN202111484316.9A CN202111484316A CN114221098A CN 114221098 A CN114221098 A CN 114221098A CN 202111484316 A CN202111484316 A CN 202111484316A CN 114221098 A CN114221098 A CN 114221098A
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- negative pressure
- battery
- liquid injection
- nail
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000003292 glue Substances 0.000 claims abstract description 24
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 239000002390 adhesive tape Substances 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/618—Pressure control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
- H01M50/645—Plugs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses a controllable negative pressure automatic sealing method of a battery, which comprises the following steps: firstly, for a plurality of electric cores to be subjected to negative pressure sealing, respectively lightly placing a rubber nail at a liquid injection hole at the top of each electric core, and keeping the rubber nails in a non-plugging state; secondly, pre-fixing each glue nail; thirdly, placing a plurality of battery cores in a vacuum negative pressure environment, and then performing negative pressure air extraction operation to enable the interior of the battery cores to be in a negative pressure state and discharge the gas in the battery cores outwards; and fourthly, stopping performing negative pressure air extraction operation on the vacuum negative pressure environment, and automatically sucking the rubber nails into the liquid injection hole through the air pressure difference between the inside and the outside of the battery cell, thereby realizing automatic negative pressure sealing. The invention can relieve the cost pressure of the negative pressure sealing process of the battery, can conveniently and reliably automatically suck the rubber nails into the liquid injection holes of the battery during the negative pressure sealing operation, has obvious sealing effect, and has the advantages of simple method, high efficiency, batch implementation and no secondary pollution.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a controllable negative pressure automatic sealing method of a battery.
Background
The negative pressure sealing is an essential important link in the manufacturing process of the battery cell, and has the main functions of: through the negative pressure air extraction operation, the interior of the shell of the battery cell reaches a negative pressure state after the formation is finished, so that enough buffer space is ensured to exist in the battery cell, and the expansion of the battery cell caused by gas production in the circulation process is buffered.
At present, the negative pressure capper is widely used in each battery enterprise at home and abroad for carry out the negative pressure operation of sealing to the battery, however, the current negative pressure capper, its purchase cost is high to in the negative pressure air exhaust process, the inside electrolyte of battery is easily sucked out to negative pressure mouth wherein, thereby causes secondary pollution to other batteries, simultaneously, because require "a mouth to a core (one negative pressure mouth is only to correspond and connects an electric core)" there is the shortcoming that work efficiency is low.
Disclosure of Invention
The invention aims to provide a controllable negative pressure automatic sealing method of a battery aiming at the technical defects in the prior art.
Therefore, the invention provides a controllable negative pressure automatic sealing method of a battery, which comprises the following steps:
firstly, for a plurality of electric cores to be subjected to negative pressure sealing, respectively lightly arranging a rubber nail at a liquid injection hole at the top of each electric core, keeping the rubber nails in a non-plugging state, and enabling the rubber nails to have gaps with the liquid injection holes;
secondly, pre-fixing each rubber nail to prevent the rubber nail from falling off from the liquid injection hole during negative pressure air exhaust operation;
thirdly, placing the plurality of battery cells which are subjected to the pre-fixing operation of the glue nails into a hollow sealed vacuum negative pressure environment, and then performing negative pressure air extraction operation on the vacuum negative pressure environment to enable the interior of the battery cells to be in a negative pressure state, so that the gas in the battery cells is discharged outwards;
and fourthly, stopping performing negative pressure air extraction operation on the vacuum negative pressure environment, and automatically sucking the glue nail into the liquid injection hole through the air pressure difference between the inside and the outside of the battery cell under the action of atmospheric pressure, thereby realizing automatic negative pressure sealing.
Preferably, in the first step, the middle-lower part of the rubber nail is in clearance fit with the liquid injection hole.
Preferably, in the first step, the shape of the lower part of the glue nail is conical shape or truncated cone shape;
the diameters of the cone and the cone frustum are smaller than the diameter of the circular liquid injection hole.
Preferably, in the first step, the upper part of the rubber nail is in the shape of a cylinder, and the diameter of the cylinder is 0-1mm larger than the diameter of the circular liquid injection hole.
Preferably, in the second step, the top of the glue nail is pre-fixed by using the adhesive tape, and the specific operations are as follows: the front end and the rear end of a longitudinally distributed adhesive tape are respectively stuck to the front side and the rear side of the battery cell, and the bottom surface of the middle of the adhesive tape is in contact with the top of the adhesive nail.
Preferably, in the third step, a vacuum negative pressure environment, in particular a vacuum box;
the vacuum box is communicated with the air pumping port of the vacuum pump;
the exhaust port of the vacuum pump is communicated with the external atmosphere;
and the vacuum pump is used for discharging the gas in the vacuum box outwards so that the environmental pressure in the vacuum box reaches a preset value.
Compared with the prior art, the controllable negative pressure automatic sealing method of the battery has the advantages that the design is scientific, the glue nail is placed at the liquid injection hole of the battery and is pre-fixed, then the negative pressure environment is integrally manufactured for the battery core to exhaust the battery core, the interior of the battery core is in the negative pressure state, when the negative pressure operation environment is cancelled, the air pressure difference is formed under the action of the atmospheric pressure, and the glue nail is automatically sucked into the liquid injection hole through the air pressure difference, so that the purpose of automatically sealing the battery is achieved, and the method has great practical significance.
The invention can relieve the cost pressure of the negative pressure sealing process of the battery, can conveniently and reliably suck the rubber nails into the liquid injection holes of the battery during the negative pressure sealing operation, has obvious sealing effect, has the advantages of simple and efficient method, batch implementation and no secondary pollution, effectively solves the problems of high cost, low efficiency, easy pollution and the like caused by the use of the traditional negative pressure sealing machine, and can adjust the final internal state of the battery core by adjusting the negative pressure and the pressure maintaining time.
Drawings
FIG. 1 is a basic flow chart of a method for automatically sealing a battery under a controllable negative pressure according to the present invention;
fig. 2 is a schematic diagram of a position relationship between a battery and an adhesive tape or an adhesive nail according to an embodiment of the method for automatically sealing a battery under a controllable negative pressure.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 and 2, the invention provides a controllable negative pressure automatic sealing method of a battery, which comprises the following steps:
firstly, for a plurality of electric cores 4 to be sealed under negative pressure, a glue nail 2 is respectively and lightly arranged at a liquid injection hole 3 at the top of each electric core 4, the glue nail 2 is kept in a non-plugging state, and a gap is formed between the glue nail 2 and the liquid injection hole 3;
secondly, pre-fixing each glue nail 2 to prevent the glue nails 2 from falling off from the liquid injection holes 3 during negative pressure air exhaust operation;
thirdly, placing the plurality of battery cells 4 which are subjected to the glue nail pre-fixing operation into a hollow sealed vacuum negative pressure environment, and then performing negative pressure air extraction operation on the vacuum negative pressure environment to enable the interior of the battery cells 4 to be in a negative pressure state, so that the gas in the battery cells 4 is discharged outwards;
and fourthly, stopping performing negative pressure air extraction operation on the vacuum negative pressure environment, and automatically sucking the glue nail 2 into the liquid injection hole 3 through the air pressure difference between the inside and the outside of the battery core 4 under the action of the atmospheric pressure, thereby realizing automatic negative pressure sealing.
In the first step, the middle-lower part of the rubber nail 2 is in clearance fit with the liquid injection hole 3.
In the first step, the shape of the lower part of the rubber nail 2 is conical shape or truncated cone shape;
the diameters of the cone and the truncated cone are smaller than the diameter of the circular liquid injection hole 3.
In the first step, the upper part of the rubber nail 2 is in the shape of a cylinder, and the diameter of the cylinder is 0-1mm larger than that of the circular liquid injection hole 3 (namely, 0-1mm larger than that of the liquid injection hole 3).
The rubber nails 2 are elastic rubber nails, and the material used therefor may be any material as long as it does not react with the electrolyte.
In the second step, the top of the adhesive tape 1 is used for pre-fixing the adhesive nail 2, and the specific operation is as follows: the front end and the rear end of a longitudinally distributed adhesive tape 1 are respectively stuck to the front side and the rear side of the battery core 4, and the bottom surface of the middle part of the adhesive tape 1 is contacted with the top of the adhesive nail 2. Of course, other pre-fixing methods of the glue nails can be used, not limited to adhesive tapes.
In the third step, the vacuum negative pressure environment can be specifically a vacuum box which is communicated with the extraction opening of the vacuum pump;
the exhaust port of the vacuum pump is communicated with the external atmosphere;
and the vacuum pump is used for exhausting the gas in the vacuum box outwards so that the ambient pressure in the vacuum box reaches a preset value (for example, 5-10 Kpa).
Of course, in the present invention, the hollow sealed vacuum negative pressure environment is not limited to the vacuum box.
Compared with the prior art, the controllable negative pressure automatic sealing method of the battery provided by the invention has the following beneficial effects:
1. the cost is low. In the invention, a device cheaper than a negative pressure sealing machine can be selected for negative pressure sealing, such as: vacuum box, and maintenance cost is low.
2. No secondary pollution. The invention can provide a negative pressure environment for the whole battery core, does not need to use a negative pressure sealing machine as the prior art, and avoids the problem of sucking out electrolyte caused by the suction nozzle of the negative pressure sealing machine, thereby effectively preventing the electrolyte from causing secondary pollution to other batteries.
3. High efficiency. The traditional negative pressure sealing machine adopts 'one nozzle to one core', namely, one negative pressure nozzle only causes negative pressure to the inside of a single electric core, but the method has the advantage of 'one machine to multiple cores', can place a plurality of batteries in a vacuum negative pressure environment (such as a vacuum box), provides a negative pressure environment for a plurality of electric cores at the same time, realizes the negative pressure automatic sealing operation of the plurality of electric cores, and improves the processing efficiency.
4. And (4) controllable. The invention can ensure the final exhaust effect in the battery cell by adjusting the environmental pressure (5Kpa-10Kpa) and the pressure maintaining time (more than 5s) in the vacuum negative pressure environment (such as a vacuum box).
In summary, compared with the prior art, the controllable negative pressure automatic sealing method of the battery provided by the invention has scientific design, the glue nail is placed at the liquid injection hole of the battery and is pre-fixed, then the negative pressure environment is integrally manufactured for the battery core to exhaust the battery core, so that the interior of the battery core is in a negative pressure state, when the negative pressure operation environment is cancelled, the air pressure difference is formed under the action of the atmospheric pressure, and the glue nail is automatically sucked into the liquid injection hole through the air pressure difference, so that the purpose of automatically sealing the battery is achieved, and the method has great practical significance.
The invention can relieve the cost pressure of the negative pressure sealing process of the battery, can conveniently and reliably suck the rubber nails into the liquid injection holes of the battery during the negative pressure sealing operation, has obvious sealing effect, has the advantages of simple and efficient method, batch implementation and no secondary pollution, effectively solves the problems of high cost, low efficiency, easy pollution and the like caused by the use of the traditional negative pressure sealing machine, and can adjust the final internal state of the battery core by adjusting the negative pressure and the pressure maintaining time.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A controllable negative pressure automatic sealing method of a battery is characterized by comprising the following steps:
firstly, for a plurality of electric cores (4) to be sealed under negative pressure, a glue nail (2) is respectively and lightly arranged in a liquid injection hole (3) at the top of each electric core (4), the glue nail (2) is kept in a non-plugging state, and a gap is formed between the glue nail (2) and the liquid injection hole (3);
secondly, pre-fixing each glue nail (2) to prevent the glue nails (2) from falling off from the liquid injection holes (3) during negative pressure air exhaust operation;
thirdly, putting a plurality of battery cores (4) which are subjected to the glue nail pre-fixing operation into a hollow sealed vacuum negative pressure environment, and then performing negative pressure air extraction operation on the vacuum negative pressure environment to enable the interior of the battery cores (4) to be in a negative pressure state, so that the gas in the battery cores (4) is discharged outwards;
and fourthly, stopping performing negative pressure air extraction operation on the vacuum negative pressure environment, and automatically sucking the glue nail (2) into the liquid injection hole (3) through the air pressure difference between the inside and the outside of the battery cell (4) under the action of the atmospheric pressure, thereby realizing automatic negative pressure sealing.
2. The method for automatically sealing the battery under the controlled negative pressure as claimed in claim 1, wherein in the first step, the middle lower part of the rubber nail (2) is in clearance fit with the liquid injection hole (3).
3. The method for automatically sealing the battery under the controlled negative pressure as claimed in claim 1, wherein, in the first step, the shape of the lower part of the rubber nail (2) is conical shape or truncated cone shape;
the diameters of the cone and the truncated cone are smaller than the diameter of the circular liquid injection hole (3).
4. The method for automatically sealing the battery under the controlled negative pressure as claimed in claim 1, wherein in the first step, the upper part of the rubber nail (2) is in the shape of a cylinder, and the diameter of the cylinder is 0-1mm larger than that of the circular liquid injection hole (3).
5. The method for automatically sealing the battery under the controlled negative pressure as claimed in claim 1, wherein in the second step, the adhesive tape (1) is used to pre-fix the top of the adhesive nail (2), and the specific operations are as follows: the front end and the rear end of a longitudinally distributed adhesive tape (1) are respectively stuck to the front side and the rear side of the battery core (4), and the bottom surface of the middle part of the adhesive tape (1) is contacted with the top of the adhesive nail (2).
6. The method for automatically sealing a battery under controlled negative pressure according to any one of claims 1 to 5, wherein in the third step, a vacuum negative pressure environment, specifically a vacuum box;
the vacuum box is communicated with the air pumping port of the vacuum pump;
the exhaust port of the vacuum pump is communicated with the external atmosphere;
and the vacuum pump is used for discharging the gas in the vacuum box outwards so that the environmental pressure in the vacuum box reaches a preset value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111484316.9A CN114221098A (en) | 2021-12-07 | 2021-12-07 | Controllable negative pressure automatic sealing method for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111484316.9A CN114221098A (en) | 2021-12-07 | 2021-12-07 | Controllable negative pressure automatic sealing method for battery |
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| Publication Number | Publication Date |
|---|---|
| CN114221098A true CN114221098A (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111484316.9A Pending CN114221098A (en) | 2021-12-07 | 2021-12-07 | Controllable negative pressure automatic sealing method for battery |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1705144A (en) * | 2004-06-01 | 2005-12-07 | 肇庆市风华锂电池有限公司 | Method and apparatus for battery vacuum sealing |
| CN205692902U (en) * | 2016-06-23 | 2016-11-16 | 芜湖格利特新能源科技有限公司 | A kind of power lithium-ion battery gluing spike devices |
| CN106784590A (en) * | 2017-01-16 | 2017-05-31 | 力信（江苏）能源科技有限责任公司 | A kind of vacuum stopper glue closing device and its mouth-sealing method suitable for electrokinetic cell |
| CN108871695A (en) * | 2018-06-08 | 2018-11-23 | 合肥国轩高科动力能源有限公司 | Leakage detection device used before lithium battery liquid injection |
| CN210379251U (en) * | 2019-08-06 | 2020-04-21 | 瑞浦能源有限公司 | High negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electricity core |
-
2021
- 2021-12-07 CN CN202111484316.9A patent/CN114221098A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1705144A (en) * | 2004-06-01 | 2005-12-07 | 肇庆市风华锂电池有限公司 | Method and apparatus for battery vacuum sealing |
| CN205692902U (en) * | 2016-06-23 | 2016-11-16 | 芜湖格利特新能源科技有限公司 | A kind of power lithium-ion battery gluing spike devices |
| CN106784590A (en) * | 2017-01-16 | 2017-05-31 | 力信（江苏）能源科技有限责任公司 | A kind of vacuum stopper glue closing device and its mouth-sealing method suitable for electrokinetic cell |
| CN108871695A (en) * | 2018-06-08 | 2018-11-23 | 合肥国轩高科动力能源有限公司 | Leakage detection device used before lithium battery liquid injection |
| CN210379251U (en) * | 2019-08-06 | 2020-04-21 | 瑞浦能源有限公司 | High negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electricity core |
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Application publication date: 20220322 |