CN216624416U - Battery cover plate structure and power battery shell - Google Patents
Battery cover plate structure and power battery shell Download PDFInfo
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- CN216624416U CN216624416U CN202123432503.0U CN202123432503U CN216624416U CN 216624416 U CN216624416 U CN 216624416U CN 202123432503 U CN202123432503 U CN 202123432503U CN 216624416 U CN216624416 U CN 216624416U
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- cover plate
- liquid injection
- exhaust
- plate structure
- battery cover
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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 provides a battery cover plate structure and a power battery shell, wherein the battery cover plate structure comprises a cover plate body with a pole unit, and the cover plate body is provided with a liquid injection part and an exhaust part; the liquid injection part comprises a liquid injection channel which penetrates through the cover plate body, the outer end of the liquid injection channel is plugged with a plugging piece, a first one-way circulation part is arranged in the liquid injection channel, and the circulation medium is limited to flow from the outside to the inside of the liquid injection channel in a one-way manner; the exhaust part comprises an exhaust passage penetrating through the cover plate body, a second one-way circulation part is arranged at one end of the exhaust passage communicated with the outside, an exhaust film is arranged in the exhaust passage, the exhaust film limits gas to be communicated to the outside in one way through the exhaust passage, and the circulation direction of the second one-way circulation part is opposite to that of the first one-way circulation part. According to the battery cover plate structure, the liquid injection part and the exhaust part are arranged separately, the flowing direction of a circulating medium is limited, the liquid injection time is shortened, and the electrolyte is prevented from leaking and polluting.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery cover plate structure. The utility model also relates to a power battery shell with the battery cover plate structure.
Background
The lithium battery is the fastest developing item in the new energy industry and is widely applied to digital products and the automobile industry. In the manufacturing process of the lithium battery, as the battery is developed to high energy density, the rate of immersion liquid is gradually reduced when the assembly ratio is gradually increased, and a single liquid injection cycle usually needs 15-25min, the liquid injection rate is seriously influenced, so that the liquid injection section is huge in investment into equipment machines and extremely high in energy consumption waste. After the liquid injection of the battery core is finished, the battery and the clamp are polluted by the overflow of electrolyte, and a large amount of electrolyte overflows in the high-temperature aging and constraint pre-charging forming process, so that the battery body and the tool clamp are seriously polluted; the pollution ratio of the electrolyte of the industrial horizontal aluminum-shell battery is between 10 and 40 percent; the process efficiency is seriously influenced, and the manual cleaning cost is increased. The inconsistency of the liquid emission amount has great influence on the performance and consistency of the battery cell, and the polluted aluminum shell can aggravate corrosion and generate foreign matters on appearance, so that the yield and the performance of the product are directly influenced. The pre-charging is completed by inserting and pulling the rubber nails for the second time, so that the process is complicated, the equipment investment is huge, and the process period is long.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a battery cover plate structure, which can prevent the electrolyte from overflowing.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
a battery cover plate structure comprises a cover plate body with a pole unit, wherein a liquid injection part and an exhaust part are arranged on the cover plate body; the liquid injection part comprises a liquid injection channel which penetrates through the cover plate body, one end, communicated with the outside, of the liquid injection channel is plugged with a plugging piece, a first one-way circulation part is arranged in the liquid injection channel, and the first one-way circulation part limits one-way circulation of circulation media from the outside to the inside of the liquid injection channel; the exhaust part comprises an exhaust passage penetrating through the cover plate body, a second one-way circulation part is arranged at one end of the exhaust passage communicated with the outside, an exhaust membrane is arranged in the exhaust passage, and the circulation direction of the second one-way circulation part is opposite to that of the first one-way circulation part.
Further, the first one-way circulation part comprises a valve plate arranged in the liquid injection channel and an elastic piece elastically abutted between the valve plate and the cover plate body.
Further, the liquid injection channel comprises a small-diameter section and a large-diameter section which are connected, and the large-diameter section is connected with the small-diameter section through a conical surface; the valve plate with the conical surface laminating sets up, just the valve plate is because of accepting the top of pushing of elastic component is in on the conical surface.
Further, the elastic piece adopts a spring or an elastic sheet.
Furthermore, the outside of apron body is equipped with the connecting piece, the connecting piece inside be formed with the intercommunication passageway of notes liquid passageway intercommunication, the shutoff piece is located on the connecting piece.
Further, the plugging piece comprises a main body made of rubber and an aluminum shell wrapping the main body.
Further, the second one-way flow portion has the same structure as the first one-way flow portion.
Further, the edge of the exhaust membrane is provided with an annular gasket;
an annular clamping groove is formed in the side wall of the exhaust channel in an inwards concave mode, and the exhaust membrane is clamped in the annular clamping groove through the annular gasket.
Further, the exhaust membrane is made of polypropylene or polytetrafluoroethylene.
Compared with the prior art, the utility model has the following advantages:
(1) according to the battery cover plate structure, the liquid injection part and the exhaust part are arranged separately, and the flowing direction of a circulating medium is limited, so that the electrolyte can be effectively prevented from overflowing; in addition, the gas generated in the battery during use can be discharged from the exhaust membrane when the pressure reaches a certain value, so that the safety performance of the battery is improved.
(2) The valve plate is elastically connected with the cover plate body and can be automatically opened and closed under the action of pressure difference.
(3) Set up the conical surface in the notes liquid passageway, can carry on spacingly to the elastic component, the sealed effect of face contact is better.
(4) The connecting piece is arranged on the outer side of the cover plate body, so that the arrangement of the plugging piece can be facilitated.
(5) The plugging piece adopts rubber and an aluminum shell, and can be punctured through a needle head during liquid injection, so that the operation is simple and convenient.
(6) The second one-way circulation part adopts the same structure as the first one-way circulation part, so that the universality and interchangeability of accessories are facilitated.
(7) The edge of the exhaust membrane is provided with the annular gasket, so that the exhaust membrane is simple and convenient to fix and good in sealing effect.
In addition, another object of the present invention is to provide a power battery casing, which includes the above battery cover plate structure.
Compared with the prior art, the power battery shell and the battery cover plate structure have the same beneficial effects, and are not described again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is an overall schematic view of a battery cover plate structure according to an embodiment of the utility model from a viewing angle;
fig. 2 is an overall schematic view of a battery cover plate structure according to an embodiment of the utility model from another view angle;
fig. 3 is a schematic structural diagram of a battery cover plate structure according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of another battery cover plate structure according to an embodiment of the present invention;
fig. 5 is a schematic view of a battery cover plate structure in a liquid injection state according to an embodiment of the present invention.
Description of reference numerals:
1. a liquid injection channel; 2. a conical surface; 3. a valve plate; 4. an elastic member; 5. an exhaust passage; 6. a connecting member; 7. a cover plate body; 8. an exhaust membrane; 9. a blocking member; 10. a positive post; 11. a negative pole post; 12. a mounting ring; 13. and (4) injecting a liquid needle.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment relates to a battery cover plate structure, which comprises a cover plate body 7 with a pole unit, wherein the cover plate body 7 is provided with a liquid injection part and an exhaust part.
Wherein, annotate the liquid portion including the notes liquid passageway 1 that runs through apron body 7 and set up, the one end shutoff that annotates liquid passageway 1 and external intercommunication has a shutoff 9, is equipped with first one-way circulation portion in annotating liquid passageway 1, and first one-way circulation portion is injectd circulation medium and is flowed to one-way circulation in annotating liquid passageway 1 by the external world. The exhaust part comprises an exhaust passage 5 penetrating through the cover plate body 7, a second one-way circulation part is arranged at one end of the exhaust passage 5 communicated with the outside, an exhaust membrane 8 is arranged in the exhaust passage 5, and the circulation direction of the second one-way circulation part is opposite to that of the first one-way circulation part.
The battery cover plate structure of the embodiment can effectively prevent the electrolyte from overflowing by separately arranging the liquid injection part and the exhaust part and limiting the flowing direction of the circulating medium; in addition, gas generated inside the battery during use can be discharged from the gas discharge membrane 8 when the pressure reaches a certain value, so that the safety performance of the battery can be improved.
Based on the above general description, an example of the battery cover plate structure according to the present embodiment is shown in fig. 1, fig. 2, and fig. 3, the cover plate body 7 is a flat plate with a uniform thickness, and the post unit has a specific structure including the positive post 10 and the negative post 11 disposed on the cover plate body 7, and is adapted to the battery housing, which is not limited in the present embodiment.
As a specific implementation manner, as shown in fig. 3, the first one-way circulation portion of the present embodiment includes a valve plate 3 disposed in the liquid injection passage 1, and a radially disposed mounting ring 12 is disposed on an inner wall of one end of the liquid injection passage 1 for communicating with the outside. The elastic element 4 is a spring, and the spring is abutted with the mounting ring 12 and is arranged in the liquid injection channel 1. Of course, the elastic member 4 may also adopt other elastic structures, such as an elastic sheet, according to the size of the component, in order to achieve the effect of elastic abutment.
The liquid injection channel 1 comprises a small-diameter section and a large-diameter section which are connected with each other, and the large-diameter section is connected with the small-diameter section through a conical surface 2; the valve plate 3 and the conical surface 2 are arranged in a following shape, and the valve plate 3 is arranged on the conical surface 2 in an overhead mode due to the pushing of the bearing elastic piece 4. In order to make the valve plate 3 and the conical surface 2 contact and seal well, preferably, a rubber cushion can be fixedly connected to the periphery of the valve plate 3.
The outside of apron body 7 is equipped with connecting piece 6, and based on show under the state of fig. 3, connecting piece 6 sets up in annotating the top of liquid channel 1, and connecting piece 6 is inside to be formed with the intercommunication passageway with annotate liquid channel 1 intercommunication, and shutoff piece 9 plays the effect of shutoff to annotating liquid channel 1 on locating connecting piece 6. In addition, a catching groove is formed on the circumferential side of the connecting member 6 to facilitate connection with the blocking member 9. For the convenience of liquid injection, the plugging member 9 of the present embodiment includes a main body made of rubber, and an aluminum shell covering the main body. The blocking member 9 in this embodiment covers the communication channel of the connecting member 6, and is engaged with the engaging portion of the connecting member 6 to be connected to the connecting member engaging portion 6. The plugging piece 9 can also adopt a plug-shaped sealing structure to plug into the communicating channel.
The second one-way flow portion in this embodiment also has the same structure as the first one-way flow portion. In contrast, the second one-way flow portion is arranged in the opposite direction to the first one-way flow portion so that the flow direction of the second one-way flow portion is opposite to the first one-way flow portion. Based on the state shown in fig. 3, the exhaust membrane 8 is arranged below the second one-way circulation part in the exhaust passage 5, the exhaust membrane 8 is made of polypropylene or polytetrafluoroethylene, and only gas molecules in the battery cavity can pass through, so that the electrolyte is isolated in the battery cavity, and the filtered air and the electrolyte are separated. In order to fix the exhaust membrane 8 easily, a ring-shaped gasket may be provided on the edge of the exhaust membrane 8, and may be bonded to the exhaust membrane 8. Therefore, the annular gasket can be clamped into the annular clamping groove of the exhaust channel 5 and connected with the exhaust channel 5 in a clamping mode.
In addition, it should be noted that the connection structure of the valve plate 3 and the cover plate body 7 in the liquid injection part can also adopt the design scheme as shown in fig. 4. The elastic part 4 is arranged on a spring base which is fixedly connected with the cover plate body 7. The top of the valve plate 3 is provided with a rubber pad, and a groove matched with the rubber pad in shape is formed around the bottom of the liquid injection channel 1. In this case, the shapes of the groove and the rubber pad are not limited to the conical surfaces, and the sealing fit between the two can be realized by adopting cylindrical surfaces or rectangular surfaces. In order to improve the smoothness of the up-and-down movement of the elastic member 4, a conventional guide structure may be provided between the spring seat and the valve plate 3. During liquid injection, the valve plate 3 is opened downwards, the valve plate 3 is arranged at the bottom of the cover plate body 7 in an overhead mode through the elastic piece 4 after liquid injection is completed, and the rubber pad is embedded into the groove to complete sealing.
The utility model also relates to a power battery shell, which comprises the battery cover plate structure.
The power battery case of the present embodiment is in a state during liquid injection, as shown in fig. 5. First, an exhaust pump is connected to the upper end of the exhaust passage 5 to pump air out of the battery case, thereby bringing the battery case into a negative pressure state. Due to the pressure difference between the two ends, the valve plate 3 of the second one-way circulation part is automatically opened upwards, and the valve plate 3 of the liquid injection part is automatically opened downwards. Then, the injection needle 13 is inserted into the block piece 9, and the electrolyte is injected into the battery case through the injection passage 1. Meanwhile, air in the battery case is discharged from the exhaust passage 5 through the exhaust film 8, and the electrolyte is blocked in the battery case by the exhaust film 8, thereby preventing the electrolyte from overflowing. After liquid injection is completed, the valve plate 3 of the liquid injection channel 1 is abutted to the conical surface 2 under the driving of the elastic piece 4, so that the liquid injection channel 1 is sealed, and electrolyte of the battery shell is prevented from being reversely discharged from the liquid injection channel 1.
The power battery shell of this embodiment through adopting as above battery cover plate structure, can effectively prevent that electrolyte from overflowing, can reach the automatic discharge of the inside gas of battery when the pressure reaches a definite value simultaneously, has improved the security performance of battery greatly.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A battery cover plate structure, includes apron body (7) that has utmost point post unit, its characterized in that:
the cover plate body (7) is provided with a liquid injection part and an exhaust part;
the liquid injection part comprises a liquid injection channel (1) penetrating through the cover plate body (7), one end, communicated with the outside, of the liquid injection channel (1) is plugged with a plugging piece (9), a first one-way circulation part is arranged in the liquid injection channel (1), and the first one-way circulation part limits one-way circulation of a circulation medium from the outside to the inside of the liquid injection channel (1);
the exhaust part comprises an exhaust passage (5) penetrating through the cover plate body (7), a second one-way circulation part is arranged at one end, communicated with the outside, of the exhaust passage (5), an exhaust membrane (8) is arranged in the exhaust passage (5), and the circulation direction of the second one-way circulation part is opposite to that of the first one-way circulation part.
2. The battery cover plate structure of claim 1, wherein:
the first one-way circulation part comprises a valve plate (3) arranged in the liquid injection channel (1) and an elastic piece (4) elastically abutted between the valve plate (3) and the cover plate body (7).
3. The battery cover plate structure of claim 2, wherein:
the liquid injection channel (1) comprises a small-diameter section and a large-diameter section which are connected, and the large-diameter section is connected with the small-diameter section through a conical surface (2);
valve plate (3) with conical surface (2) laminating setting, just valve plate (3) are because of accepting the top of elastic component (4) pushes up in on conical surface (2).
4. The battery cover plate structure of claim 2, wherein:
the elastic piece (4) adopts a spring or an elastic sheet.
5. The battery cover plate structure of claim 1, wherein:
the outer side of the cover plate body (7) is provided with a connecting piece (6), a communicating channel communicated with the liquid injection channel (1) is formed inside the connecting piece (6), and the plugging piece (9) is arranged on the connecting piece (6).
6. The battery cover plate structure of claim 5, wherein:
the plugging piece (9) comprises a main body made of rubber and an aluminum shell wrapping the main body.
7. The battery cover plate structure of claim 1, wherein:
the second one-way flow portion has the same structure as the first one-way flow portion.
8. The battery cover plate structure of claim 1, wherein:
the edge of the exhaust membrane (8) is provided with an annular gasket;
an annular clamping groove is formed in the side wall of the exhaust channel (5) in an inwards concave mode, and the exhaust membrane (8) is clamped in the annular clamping groove through the annular gasket.
9. The battery cover plate structure of claim 8, wherein:
the exhaust membrane (8) is made of polypropylene or polytetrafluoroethylene.
10. A power battery shell is characterized in that: the power battery housing comprises the battery cover plate structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123432503.0U CN216624416U (en) | 2021-12-30 | 2021-12-30 | Battery cover plate structure and power battery shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123432503.0U CN216624416U (en) | 2021-12-30 | 2021-12-30 | Battery cover plate structure and power battery shell |
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| Publication Number | Publication Date |
|---|---|
| CN216624416U true CN216624416U (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123432503.0U Active CN216624416U (en) | 2021-12-30 | 2021-12-30 | Battery cover plate structure and power battery shell |
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| CN (1) | CN216624416U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454358A (en) * | 2023-06-16 | 2023-07-18 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
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2021
- 2021-12-30 CN CN202123432503.0U patent/CN216624416U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454358A (en) * | 2023-06-16 | 2023-07-18 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
| CN116454358B (en) * | 2023-06-16 | 2023-08-15 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
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