CN210379251U - High negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electricity core - Google Patents
High negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electricity core Download PDFInfo
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- CN210379251U CN210379251U CN201921262800.5U CN201921262800U CN210379251U CN 210379251 U CN210379251 U CN 210379251U CN 201921262800 U CN201921262800 U CN 201921262800U CN 210379251 U CN210379251 U CN 210379251U
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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a high negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electric core, this high negative pressure closing device includes: a first conduit and a first control valve located on the first conduit; the second pipeline and be located second control valve and third control valve on the second pipeline, wherein, first pipeline intercommunication is between second control valve and the third control valve on the second pipeline, and the third control valve end of second pipeline is connected the notes liquid mouth of battery, and the other end is connected the vacuum mechanism, and first pipeline is connected back helium mechanism for carry helium. The utility model discloses an add the third control valve, provide a buffer memory region for the helium, improve the inside vacuum of battery, effectively protect battery and vacuum meter, improve the vacuum monitoring accuracy.
Description
Technical Field
The utility model relates to a battery manufacturing technology field, concretely relates to closing device and negative pressure sealing mechanism after liquid is annotated to electric core of aluminum hull battery.
Background
The lithium ion battery is the preferred power source of the electric automobile with the advantages of large energy density, high power density, long cycle life, good reliability, high safety, small volume, light weight and the like. The battery core is the core of the lithium battery and consists of electrodes and electrolyte, and the outside of the battery core is shaped and protected by a shell, a cover plate and the like.
Lithium cell in the existing market generally adopts the rectangle structure, and the casing is the platykurtic usually, and the casing material is mostly stainless steel or aluminium, but because the lithium cell of aluminum hull has the characteristics that the capacity is bigger than steel-shelled battery, the lithium cell development trend in the event market is rectangle aluminum hull lithium cell. In the production process of the aluminum-shell lithium battery, the battery cell can form an SEI film and generate gas in a formation process, and the generated gas easily stays between the pole piece and the pole piece, so that the battery needs to be subjected to air bleeding treatment. In the manufacturing process of the battery cell, the optimization of the negative pressure sealing process is the key of the long-term circulation of the battery cell. The negative pressure sealing mechanism mainly comprises a battery cell cylinder clamping mechanism, a vacuumizing mechanism, a helium returning mechanism and a sealing device. The negative pressure sealing process comprises the steps of firstly vacuumizing the battery cell, injecting a small amount of helium gas in a high altitude state, sealing by using a rubber nail (or a steel ball) and finishing the negative pressure sealing action. The process can improve the subsequent cycle performance, reduce the battery micro-air-blowing phenomenon caused by side reaction generated by long-term circulation, and improve the service efficiency of the battery core.
However, with the current conventional cell negative pressure sealing device, the pressure rate of helium entering the cell is uncontrollable. When the electric core finishes the action of sealing, the actual vacuum degree kept in the electric core is lower than the set value of helium return, and the expected exhaust effect cannot be achieved. The strong helium pressure also impacts the battery and the vacuum gauge, resulting in inaccurate vacuum detection.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can control and return helium speed, guarantee the inside high vacuum of electric core, improve the electric core of vacuum monitoring accuracy and annotate the high negative pressure closing device after the liquid.
In order to achieve the above object, the utility model provides a negative pressure closing device after liquid is annotated to electric core, this closing device contains:
a first conduit and a first control valve located on the first conduit;
a second conduit and second and third control valves located on the second conduit;
wherein: the first pipeline is communicated with the second pipeline, the first pipeline is connected between the second control valve and the third control valve on the second pipeline, and the end direction of the third control valve of the second pipeline is connected with the liquid injection port of the storage battery.
Preferably, the length of the pipeline between the third control valve and the liquid injection port is less than 0.5 m.
Preferably, the third control valve is not more than 1 meter away from the pipeline of the first control valve.
Preferably, the third control valve is not more than 1 meter away from the pipeline of the second control valve.
Preferably, the first pipeline is connected with a helium returning mechanism.
Preferably, the second control valve end of the second pipeline is connected with a vacuum pumping mechanism.
Preferably, the angle formed by the connection of the first pipeline and the second pipeline is 90 degrees
Preferably, the housing of the storage battery is made of aluminum. By adopting the aluminum shell, the battery can endure higher vacuum degree, thereby ensuring that the shape of the battery is not changed.
Preferably, the battery is a lithium ion battery.
Preferably, the pipeline is concise as far as possible under the condition of ensuring that the productivity reaches the standard, the branches are few, and the distance between the valves is short, so that the vacuum degree in the battery is improved.
Preferably, the battery has been subjected to a formation process. The vacuum sealing is carried out after the battery is formed, so that the inside of the battery is almost free of gas in the using process, and the capacity and the service life of the battery are ensured.
The utility model provides a high negative pressure closing device after liquid is annotated to electricity core's beneficial effect as follows:
the utility model provides a high negative pressure closing device after liquid is annotated to electricity core has set up the third control valve, can provide the buffer memory interval for the helium, prevents that the strong and fast impact that leads to electric core and vacuum meter of helium source pressure to and reduce the error influence of helium pressure head to battery vacuum measurement, improved the vacuum monitoring accuracy of electric core. When the third control valve is opened, helium reaches the inside of the battery in the shortest time, so that helium is prevented from being injected into the inside of the battery due to high pressure and high speed of a helium source, the vacuum degree of the battery cell is higher when the sealing action is finished, the recycling of the battery cell is improved, and the service life of the storage battery is prolonged.
Drawings
Fig. 1 is the utility model discloses a high negative pressure closing device's after liquid is annotated to electric core structural schematic.
In the figure: 1-a first pipeline, 101-a first control valve, 2-a second pipeline, 201-a second control valve, 202-a third control valve, 3-a storage battery and 4-a liquid injection port.
Fig. 2 is a schematic structural view of a conventional closure.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 1, for the utility model discloses a high negative pressure closing device after being used for electric core to annotate liquid, the utility model provides a negative pressure closing device after liquid is annotated to electric core, this closing device contains:
a first pipeline 1 and a first control valve 101 located on the first pipeline 1;
a second pipe 2 and a second control valve 201 and a third control valve 202 on the second pipe 2;
wherein: the first pipeline is communicated with the second pipeline, the first pipeline 1 is connected between the second control valve 201 and the third control valve 202 on the second pipeline 2, and the end of the third control valve 202 of the second pipeline 2 is connected with the liquid injection port 4 of the storage battery 3.
The length of the pipeline between the third control valve 202 and the liquid injection port 4 is less than 0.5 m.
The third control valve 202 is not more than 1 meter away from the pipeline of the first control valve 101.
The third control valve 202 is not more than 1 meter away from the pipeline of the second control valve 201.
The first pipeline 1 is connected with a helium returning mechanism and used for delivering helium gas to the battery.
The end direction of the second control valve 201 of the second pipeline 2 is connected with a vacuum pumping mechanism to improve the negative pressure environment for the battery.
The angle formed by the connection of the first pipeline 1 and the second pipeline 2 is 90 degrees.
The shell of the storage battery 3 is made of aluminum. By adopting the aluminum shell, the battery can endure higher vacuum degree, thereby ensuring that the shape of the battery is not changed.
The storage battery is a lithium ion battery.
The production capacity is guaranteed to reach the standard, the pipeline is simple as far as possible, the number of branches is small, the distance between the valves is short, and therefore the vacuum degree inside the battery is improved.
The accumulator 3 has been subjected to a chemical conversion treatment. The vacuum sealing is carried out after the battery is formed, so that the inside of the battery is almost free of gas in the using process, and the capacity and the service life of the battery are ensured.
Comparative example
Fig. 2 is a schematic structural diagram of a conventional negative pressure helium returning sealing device. The conventional negative pressure sealing steps are as follows:
And step 2, opening the second control valve 201, and opening the vacuumizing device to enable the vacuum degree of the battery cell to reach a stable state.
And step 3, closing the second control valve 201, opening the first control valve 101, and inputting helium gas into the battery cell.
And step 4, closing the first control valve 101 after the helium value of the battery core reaches a set value.
The conventional negative pressure helium returning sealing device directly inputs helium into a liquid injection port, the pressure rate of the helium entering a battery cell is low, the actually maintained vacuum degree in the battery cell is lower than a set value of helium returning, the expected exhaust effect cannot be achieved, errors are easily caused to a vacuum meter due to strong pressure impact of a helium source, and the monitoring cannot be reliably carried out.
Examples
Embodiment negative pressure vacuum apparatus adopts the high negative pressure sealing device shown in fig. 1, and the using steps are as follows:
And 2, opening the second control valve 201 and the third control valve 202 in sequence, starting a vacuumizing device, and vacuumizing the battery cell device.
And 3, after the vacuum is in a stable state, closing the third control valve 202 and the second control valve 201 in sequence, and opening the first control valve 101.
And step 4, after the helium of the pipeline reaches a set value, closing the first control valve 101, opening the third control valve 202, and injecting helium into the battery cell.
And 5, closing the third control valve 202 after the helium in the battery core reaches a set value, and performing sealing action.
The utility model provides a high negative pressure closing device after liquid is annotated to electric core compares conventional closing device, has increased third control valve 202, can provide the buffer memory interval for the helium, prevents that the strong and fast impact to electric core and vacuum meter that leads to of helium source pressure to and reduce the error influence of helium pressure head to battery vacuum measurement, improved the vacuum monitoring accuracy of electric core. When the third control valve 202 is opened, helium also reaches the inside of the battery in the shortest time, so that helium is prevented from being injected into the inside of the battery due to the high pressure and high speed of a helium source, the vacuum degree of the battery cell is higher when the sealing action is finished, the recycling of the battery cell is improved, and the service life of the storage battery is prolonged.
To sum up, the utility model provides a high negative pressure closing device after liquid is annotated to electricity core can improve the inside vacuum of battery, effectively protects battery and vacuum meter, improves the vacuum monitoring accuracy.
While the present invention has been described in detail with respect to the above embodiments, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (9)
1. The utility model provides a high negative pressure closing device after liquid is annotated to electric core which characterized in that, this closing device contains:
the first pipeline is provided with a first control valve;
the second pipeline is communicated with a liquid injection port of the storage battery, a second control valve and a third control valve are arranged on the second pipeline, and the third control valve is close to the liquid injection port;
wherein: the first pipe is communicated with the second pipe, and the first pipe is connected between the second control valve and the third control valve on the second pipe.
2. The high negative pressure sealing device after battery core liquid injection of claim 1, wherein the length of the third control valve from the liquid injection port is less than 0.5 m.
3. The high negative pressure sealing device after battery core liquid injection of claim 1, wherein the distance from the third control valve to the pipeline of the first control valve is not more than 1 m.
4. The high negative pressure sealing device after battery core liquid injection of claim 1, wherein the distance from the third control valve to the pipeline of the second control valve is not more than 1 m.
5. The post-injection high negative pressure sealing device for a battery cell of claim 1, wherein the first pipeline is connected to a helium returning mechanism for delivering helium.
6. The post-injection high negative pressure sealing device for a battery cell of claim 1, wherein a second control valve end of the second pipeline is connected to a vacuum pumping mechanism.
7. The post-injection high negative pressure sealing device for battery cells according to claim 1, wherein an angle formed by the connection of the first pipe and the second pipe is 90 °.
8. The post-injection high negative pressure sealing device for battery cells of claim 1, wherein the storage battery is a lithium ion battery.
9. A negative pressure sealing mechanism, comprising: a cell cylinder clamping mechanism, a vacuum pumping mechanism, a helium returning mechanism, and the high negative pressure sealing device after the liquid injection of the cell according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921262800.5U CN210379251U (en) | 2019-08-06 | 2019-08-06 | High negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electricity core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921262800.5U CN210379251U (en) | 2019-08-06 | 2019-08-06 | High negative pressure closing device and negative pressure sealing mechanism after liquid is annotated to electricity core |
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| CN210379251U true CN210379251U (en) | 2020-04-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221098A (en) * | 2021-12-07 | 2022-03-22 | 力神（青岛）新能源有限公司 | Controllable negative pressure automatic sealing method for battery |
| CN115441061A (en) * | 2022-08-16 | 2022-12-06 | 湖北钛时代新能源有限公司 | Composite titanium lithium ion battery, negative pressure sealing method and device |
-
2019
- 2019-08-06 CN CN201921262800.5U patent/CN210379251U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221098A (en) * | 2021-12-07 | 2022-03-22 | 力神（青岛）新能源有限公司 | Controllable negative pressure automatic sealing method for battery |
| CN115441061A (en) * | 2022-08-16 | 2022-12-06 | 湖北钛时代新能源有限公司 | Composite titanium lithium ion battery, negative pressure sealing method and device |
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Address after: Room 923, building a, Castle Peak headquarters building, 2666 Longxiang Road, Longwan District, Wenzhou City, Zhejiang Province 325024 Patentee after: Ruipu Lanjun Energy Co.,Ltd. Patentee after: Shanghai ruipuqing innovative energy Co., Ltd Address before: Room 923, building a, Castle Peak headquarters building, 2666 Longxiang Road, Longwan District, Wenzhou City, Zhejiang Province 325024 Patentee before: RUIPU ENERGY Co.,Ltd. Patentee before: Shanghai ruipuqing innovative energy Co., Ltd |