CN210866254U - Power battery cover - Google Patents
Power battery cover Download PDFInfo
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- CN210866254U CN210866254U CN201921688365.2U CN201921688365U CN210866254U CN 210866254 U CN210866254 U CN 210866254U CN 201921688365 U CN201921688365 U CN 201921688365U CN 210866254 U CN210866254 U CN 210866254U
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- power battery
- top cover
- hole
- liquid injection
- exhaust hole
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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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Abstract
The utility model discloses a power battery cover, which is arranged on the top of a square power battery and comprises a top cover (1) which is transversely distributed; a pressure release valve (5) is arranged at the transverse middle position of the top cover (1); the left end and the right end of the top cover (1) are respectively provided with a positive pole post (2) and a negative pole post (3); the left end of the top cover (1) is also provided with a liquid injection hole (4), and the liquid injection hole (4) is positioned between the pressure release valve (5) and the positive pole (2); the right end of the top cover (1) is also provided with an exhaust hole (6), and the exhaust hole (6) is positioned between the pressure release valve (5) and the negative pole column (3); the liquid injection hole (4) is connected with a liquid injection pipe of the liquid injection device; the exhaust hole (6) is connected with an exhaust pipe of the vacuum device. The utility model discloses can solve the battery and annotate the problem that work efficiency is low that the liquid in-process exists, the utility model discloses a notes liquid hole on the top cap carries out the liquid operation, and the exhaust hole carries out the evacuation operation, can make the liquid process efficiency of annotating of battery improve.
Description
Technical Field
The utility model relates to a lithium ion power battery technical field especially relates to a power battery lid.
Background
At present, lithium ion power battery is widely applied to electric automobile, electric transportation means, and production capacity is the explosive growth in recent years, and the formation process of traditional lithium ion power battery all adopts the haplopore negative pressure device, but along with power battery's volume is bigger and bigger, and inside residual space is littleer and smaller, and the infiltration of electrolyte will slow down correspondingly, still can have to soak the risk that the abundant initiation battery separates lithium, the safety problem that initiates power battery, this has just put forward higher requirement to lithium ion battery's notes liquid chemical process.
For a common square power battery, electrolyte is injected into the battery in a vacuum mode in the liquid injection process, and then standing and soaking are carried out. In the electrolyte injection process, the mode that all adopt notes liquid hole and aspirating hole sharing extracts the vacuum, and the operation of extraction vacuum and notes liquid operation can't go on simultaneously, and this battery electrolyte that just leads to inside residual space not enough soaks slowly, and the universal practice in the industry is: the vacuum is extracted for many times, so that the standing time after liquid injection is prolonged, but the whole production efficiency of the battery is reduced, and the production cost of the battery is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power battery cover to the technical defect that prior art exists.
Therefore, the utility model provides a power battery cover, which is arranged on the top of a square power battery and comprises a top cover which is transversely distributed;
a pressure release valve is arranged at the transverse middle position of the top cover;
the left end and the right end of the top cover are respectively provided with a positive pole column and a negative pole column;
the left end of the top cover is also provided with a liquid injection hole which is positioned between the pressure release valve and the positive pole;
the right end of the top cover is also provided with an exhaust hole which is positioned between the pressure release valve and the negative pole;
the liquid injection hole is connected with a liquid injection pipe of the liquid injection device;
the exhaust hole is connected with an exhaust pipe of the vacuum device;
the inner cavity of the exhaust hole comprises an upper half cavity and a lower half cavity which are connected;
the upper half cavity is positioned above the lower half cavity;
the aperture of the cavity of the upper half part and the aperture of the cavity of the lower half part.
Wherein, the exhaust hole and the liquid injection hole are distributed in bilateral symmetry;
the ratio of the size of the area of the exhaust hole to the size of the liquid injection hole in plan view is (0.1-5): 1.
wherein, the exhaust hole is round, square or any polygon which is larger than four sides.
The exhaust hole vertically penetrates through the top cover along the thickness direction of the top cover;
the diameter of the inner side part of the top cover close to the square power battery is smaller than that of the outer side part far away from the square power battery.
The exhaust hole is far away from the outer side of the square power battery and is flush with the top cover;
the exhaust hole and the top cover are of an integrated structure.
And the peripheral edge of the outer side of the exhaust hole away from the square power battery is provided with a chamfer.
Wherein, the peripheral edge of the outer side and the peripheral edge of the inner side of the exhaust hole are respectively provided with a first chamfer and a second chamfer.
By the above the technical scheme provided by the utility model it is visible, compare with prior art, the utility model provides a power battery cover, it can solve the battery and annotate the problem that work efficiency is low that the liquid in-process exists, the utility model discloses a notes liquid hole on the top cap annotates the liquid operation, and the exhaust hole carries out the evacuation operation, and like this, annotate the liquid hole and no longer carry out main exhaust process, the inside air of battery can be taken out rapidly and do not influence the entering of electrolyte, can make electrolyte get into the inside time of battery and shorten, and the electrolyte infiltration is complete for the liquid process efficiency of annotating of battery improves.
Furthermore, the utility model discloses, combine the design science, through above structural design, can also avoid because the electrolyte soaks the incident that the battery formation that leads to is incomplete causes, improve power battery's security, be particularly suitable for to the great model of the ratio of power battery length and thickness.
Drawings
FIG. 1 is a top view of a power battery cover according to the present invention
FIG. 2 is a schematic cross-sectional view of an embodiment of a power battery cover according to the present invention
In the figure, 1, a top cover, 2, a positive pole column, 3, a negative pole column, 4, a liquid injection hole, 5, a pressure release valve, 6 and an exhaust hole;
61. first chamfer, 62, second chamfer
Detailed Description
In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 and 2, the utility model provides a power battery cover, which is installed on the top of a square power battery and specifically comprises a top cover 1 which is transversely distributed;
a pressure release valve 5 is arranged at the transverse middle position of the top cover 1;
the left end and the right end of the top cover 1 are respectively provided with a positive pole post 2 and a negative pole post 3;
the left end of the top cover 1 is also provided with a liquid injection hole 4, and the liquid injection hole 4 is positioned between the pressure release valve 5 and the positive pole 2;
the right end of the top cover 1 is also provided with an exhaust hole 6, and the exhaust hole 6 is positioned between the pressure release valve 5 and the negative pole 3;
the liquid injection hole 4 is connected with a liquid injection pipe of a liquid injection device (such as an existing battery liquid injection machine);
the exhaust hole 6 is connected to an exhaust pipe of a vacuum apparatus (for example, an existing vacuum extractor).
The inside of the battery can be communicated with the outside by providing the vent hole 6.
In the present invention, in the concrete implementation, the position of the exhaust hole 6 is located on the negative pole 3 side of the battery cover.
The utility model discloses in, on specifically realizing, exhaust hole 6 is bilateral symmetry with annotate liquid hole 4 and distributes. Of course, an asymmetric distribution is also possible.
Specifically, the ratio of the size of the area of the exhaust hole 6 to the size of the area of the liquid injection hole 4 in plan view is (0.1 to 5): 1.
the utility model discloses in, in the concrete realization, exhaust hole 6 is circular, square or arbitrary one kind is greater than the polygon of four sides.
In the concrete implementation, the inner cavity of the exhaust hole 6 comprises an upper half cavity and a lower half cavity which are connected;
the upper half cavity is positioned above the lower half cavity;
the aperture of the cavity of the upper half part and the aperture of the cavity of the lower half part.
That is, to the utility model discloses, exhaust hole 6 exposes part one end and is great hole, and the other end that communicates with each other with the battery inside is less hole.
The utility model discloses in, on specifically realizing, top cap 1 is run through perpendicularly to exhaust hole 6 along top cap 1's thickness direction.
The utility model discloses in, the utility model provides a power battery top cap is power battery's component, and top cap 1 is close to the diameter of square power battery's inside lateral part, is less than the diameter of keeping away from square power battery's outside lateral part.
The utility model discloses in, on specifically realizing, square power battery's outside side is kept away from to exhaust hole 6, with top cap 1 parallel and level.
The utility model discloses in, specifically realize, the outside side edge all around that exhaust hole 6 kept away from square power battery has the chamfer. For example, a rounded chamfer.
In a specific implementation, the peripheral edge of the outer side and the peripheral edge of the inner side (i.e., the peripheral edges of the upper and lower sides) of the exhaust hole 6 are respectively provided with a first chamfer 61 and a second chamfer 62 (which may be circular-arc chamfers). Therefore, the sealing connection between the exhaust hole 6 and the contact position of the vacuum device (the exhaust pipe of the vacuum extractor) can be facilitated, and the subsequent sealing operation of the exhaust hole 6 is also facilitated.
The utility model discloses in, on specifically realizing, exhaust hole 6 and top cap 1 formula structure as an organic whole.
It should be noted that, for the present invention, in the air exhaust process of the exhaust hole 6, a step-by-step vacuum pumping mode is adopted.
It should be noted that, to the utility model discloses, when annotating the liquid to the battery, electrolyte can follow notes liquid hole 4 and get into, and exhaust hole 6 carries out the evacuation simultaneously, consequently, can show the entering of accelerating electrolyte.
To the utility model discloses, power battery's top cap is upwards placed.
The liquid injection hole 4 is connected with a liquid injection device.
The electrolyte enters the interior of the battery through the electrolyte injection hole 4 by the electrolyte injection device.
The exhaust hole 6 is connected with a vacuum device to exhaust gas in the battery, so that pressure difference is generated between the inside and the outside of the battery.
To the utility model discloses, on specifically realizing, the evacuation process goes on for the segmentation: firstly, adjusting the negative pressure to-15 to-25 KPa, standing for 5s, adjusting the negative pressure to-45 to-50 KPa again, standing for 2s, finally, adjusting the negative pressure to-80 KPa, standing for 5s, then finishing the vacuumizing process and injecting the electrolyte.
It should be noted that, in the electrolyte injection process, air inside the battery is mainly pumped out from the air vent 6, and the electrolyte can enter the battery from the electrolyte injection hole 4 without being blocked, so that the electrolyte infiltration rate is increased, and the electrolyte infiltration is promoted to be complete. The yield of the battery in the pre-charging process is improved, and the safety performance of the battery is improved.
In the concrete implementation, when the electrolyte injection operation is carried out by adopting the process, the electrolyte injection operation can be adjusted according to different sizes of batteries, so that the electrolyte can smoothly enter and completely infiltrate.
It should be noted that, compare with prior art, power battery top cap increases exhaust hole newly, main aim at: 1. the liquid injection hole is separated from the exhaust hole, so that the liquid injection operation can be performed while the vacuum pumping operation is performed, and the liquid injection process is efficient. 2. The electrolyte can be guided to be completely soaked by continuously vacuumizing the exhaust holes, the problem of lithium precipitation caused by incomplete formation is avoided, the yield of the formation process is improved, and the potential safety hazard of a power battery is reduced.
Compared with the existing battery cover, the utility model discloses an exhaust hole with annotate the liquid hole separation, multiplicable notes liquid efficiency, the negative pole film forming problem that the problem of can effectively reducing infiltration brought, also be favorable to improving production efficiency, reduce cost.
To sum up, compare with prior art, the utility model provides a pair of power battery cover, it can solve the problem that the work efficiency is low that the battery exists at the notes liquid in-process, the utility model discloses a notes liquid hole on the top cap annotates the liquid operation, and the exhaust hole carries out the evacuation operation, and like this, annotate the liquid hole and no longer carry out main exhaust process, the inside air of battery can be taken out rapidly and do not influence the entering of electrolyte, can make electrolyte get into the inside time of battery and shorten, and the electrolyte infiltration is complete for the notes liquid process efficiency of battery improves.
Furthermore, the utility model discloses, combine the design science, through above structural design, can also avoid because the electrolyte soaks the incident that the battery formation that leads to is incomplete causes, improve power battery's security, be particularly suitable for to the great model of the ratio of power battery length and thickness.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of 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 (7)
1. A power battery cover is characterized by being arranged at the top of a square power battery and comprising a top cover (1) which is transversely distributed;
a pressure release valve (5) is arranged at the transverse middle position of the top cover (1);
the left end and the right end of the top cover (1) are respectively provided with a positive pole post (2) and a negative pole post (3);
the left end of the top cover (1) is also provided with a liquid injection hole (4), and the liquid injection hole (4) is positioned between the pressure release valve (5) and the positive pole (2);
the right end of the top cover (1) is also provided with an exhaust hole (6), and the exhaust hole (6) is positioned between the pressure release valve (5) and the negative pole column (3);
the liquid injection hole (4) is connected with a liquid injection pipe of the liquid injection device;
the exhaust hole (6) is connected with an exhaust pipe of the vacuum device;
the inner cavity of the exhaust hole (6) comprises an upper half cavity and a lower half cavity which are connected;
the upper half cavity is positioned above the lower half cavity;
the aperture of the cavity of the upper half part and the aperture of the cavity of the lower half part.
2. The power battery cover as claimed in claim 1, wherein the exhaust holes (6) and the liquid injection holes (4) are distributed in bilateral symmetry;
the ratio of the size of the area of the exhaust hole (6) to the size of the area of the liquid injection hole (4) in plan view is (0.1-5): 1.
3. the power battery cover according to claim 1, characterized in that the air vent (6) is circular, square or any polygon larger than four sides.
4. The power battery cover according to claim 1, characterized in that the vent hole (6) vertically penetrates the top cover (1) in the thickness direction of the top cover (1);
the diameter of the inner side part of the top cover (1) close to the square power battery is smaller than that of the outer side part far away from the square power battery.
5. The power battery cover according to claim 1, characterized in that the vent hole (6) is located away from the external side of the square power battery, flush with the top cover (1);
the exhaust hole (6) and the top cover (1) are of an integrated structure.
6. Power cell cover according to one of claims 1 to 5, characterised in that the peripheral edge of the outer side of the venting aperture (6) facing away from the square power cell is chamfered.
7. Power cell cover according to one of claims 1 to 5, characterised in that the outer and inner lateral peripheral edges of the venting aperture (6) are provided with a first chamfer (61) and a second chamfer (62), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921688365.2U CN210866254U (en) | 2019-10-10 | 2019-10-10 | Power battery cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921688365.2U CN210866254U (en) | 2019-10-10 | 2019-10-10 | Power battery cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210866254U true CN210866254U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921688365.2U Active CN210866254U (en) | 2019-10-10 | 2019-10-10 | Power battery cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210866254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204233A (en) * | 2021-11-23 | 2022-03-18 | 天津力神电池股份有限公司 | Lithium ion battery liquid injection method adopting polygonal double-hole liquid injection mode |
-
2019
- 2019-10-10 CN CN201921688365.2U patent/CN210866254U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204233A (en) * | 2021-11-23 | 2022-03-18 | 天津力神电池股份有限公司 | Lithium ion battery liquid injection method adopting polygonal double-hole liquid injection mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220215 Address after: 266500 Minshan Road, Huangdao District, Qingdao, Shandong Patentee after: LISHEN (QINGDAO) NEW ENERGY CO.,LTD. Address before: No.38, South Haitai Road, Binhai high tech Industrial Development Zone, Binhai New Area, Tianjin Patentee before: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. |
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| TR01 | Transfer of patent right |