CN219610703U - High leakproofness's battery top cap - Google Patents
High leakproofness's battery top cap Download PDFInfo
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- CN219610703U CN219610703U CN202320339290.7U CN202320339290U CN219610703U CN 219610703 U CN219610703 U CN 219610703U CN 202320339290 U CN202320339290 U CN 202320339290U CN 219610703 U CN219610703 U CN 219610703U
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- Prior art keywords
- liquid injection
- top cover
- hole
- sealing
- sealing element
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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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- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a high-tightness battery top cover, which relates to the technical field of batteries, wherein a top cover plate is provided with a liquid injection main hole on the surface, lower plastic is arranged on the bottom surface of the top cover plate, the surface of the lower plastic is provided with a liquid injection auxiliary hole corresponding to the liquid injection main hole, a sealing structure is arranged in the liquid injection auxiliary hole, the sealing structure comprises a sealing element and an elastic element, the sealing element is made of a rubber material, the top cover plate and the lower plastic form a top cover structure, a pole and an explosion-proof valve are arranged on the surface of the top cover structure, the sealing element is in a sphere, the liquid injection auxiliary hole is in a sinking state, the center of the liquid injection auxiliary hole is provided with a penetration hole, the elastic element can upwards prop the sealing element to enable the sealing element to be in tight contact with the bottom of the liquid injection main hole, and the defect that the sealing element is not attached due to deformation of the traditional sealing nail material is overcome.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery top cover with high sealing performance.
Background
Today, with the rapid growth of population and the rapid development of socioeconomic, resources and energy are gradually in shortage, environmental protection is increasingly emphasized, and energy development and saving are an important issue in the world today. Energy is the basis for the existence and development of human society, and modern society based on mineral energy is increasingly subjected to the crisis of energy depletion and environmental pollution. Meanwhile, with the advent of the informationized high-tech age, energy application forms are changing, and the demand for renewable, pollution-free, small-sized and discrete mobile high-performance power supplies is rapidly increasing. Green and efficient secondary batteries are being developed greatly in various countries;
the lithium battery is a battery which uses lithium metal or lithium alloy as an anode/cathode material and uses nonaqueous electrolyte solution, and has the advantages of high energy density, high power density, multiple times of cyclic use and long storage time, so that the lithium battery is widely applied to the fields of electric automobiles, energy storage and the like as an energy part, the lithium battery consists of a battery shell and a lithium battery top cover, the lithium battery top cover is provided with a liquid injection hole, and when the lithium battery is manufactured, electrolyte is injected into the lithium battery through the liquid injection hole by a liquid injection machine, but because the electrolyte used by the lithium battery has the defects of influence on effectiveness, flammability and high corrosiveness due to easy environmental pollution, the sealing guarantee of the electrolyte in the lithium battery relative to the external environment is an important technological requirement of the lithium battery, and the sealing structure of the existing liquid injection hole is usually realized by firstly punching a sealing nail and then welding a sealing aluminum sheet. Because the sealing nail is made of rubber materials, when the sealing nail is driven into the liquid injection hole, the sealing nail is easy to deform, so that the sealing nail is not attached to the liquid injection hole, and a fine gap appears at the connecting position, so that the sealing effect is directly affected, and the qualification rate of the top cover is low;
when the sealing nail enters the liquid injection hole, the sealing nail is close to the side wall of the liquid injection hole, metal burrs of the side wall of the liquid injection hole easily fall into the liquid injection hole along with the sealing nail, and the metal burrs fall into the battery cell to cause abnormal operation of the battery cell;
in summary, a sealing nail structure with strong sealing performance and burr preventing performance is urgently needed in the top cover of the existing lithium battery, and therefore, the top cover of the battery with high sealing performance is provided.
Disclosure of Invention
The utility model aims to solve the technical problems that: the problem that the sealing nail is easy to deform and is not attached to the liquid injection hole is solved, and the battery top cover with high sealing performance is provided for the problem existing in the prior art.
The aim and the effect of the utility model are achieved by the following specific technical means:
a high sealability battery top cap comprising:
a top cover plate, the surface of which is provided with a liquid injection main hole;
the lower plastic is arranged on the bottom surface of the top cover plate, and the surface of the lower plastic is provided with a liquid injection auxiliary hole corresponding to the liquid injection main hole;
the sealing structure is arranged in the liquid injection auxiliary hole and comprises a sealing piece and an elastic piece, and the sealing piece is made of rubber;
according to the design, the liquid injection main hole is sealed through the sealing element, and meanwhile, the sealing element is propped upwards through the elastic element, so that the sealing element is tightly attached to the liquid injection main hole.
Further preferred embodiments are as follows: the top cover plate and the lower plastic form a top cover structure, and a pole and an explosion-proof valve are arranged on the surface of the top cover structure;
further preferred embodiments are as follows: the sealing element is a sphere;
through the design, the sealing piece is not easy to damage the inner walls of the main liquid injection hole and the auxiliary liquid injection hole.
Further preferred embodiments are as follows: the liquid injection auxiliary hole is in a sinking state, and a penetration hole is arranged in the center of the liquid injection auxiliary hole;
further: the two ends of the liquid injection main hole are arc chamfer-shaped, and a rubber pad is arranged at one end port facing the liquid injection auxiliary hole;
the sealing element is propped against the rubber pad and is limited in the liquid injection auxiliary hole.
Further preferred embodiments are as follows: the inner diameter of the liquid injection main hole is smaller than that of the liquid injection auxiliary hole, the outer diameter of the sealing piece is larger than that of the liquid injection main hole, and the outer wall of the sealing piece is in contact with the rubber pad.
Further preferred embodiments are as follows: the elastic piece is positioned in the liquid injection auxiliary hole, and the connecting position of the sealing piece and the elastic piece is concave;
in this design, the seal reserves the accommodation space of the elastic member.
The utility model has the beneficial effects that:
1. electrolyte enters the battery cell through the liquid injection main hole, the sealing element is pushed into the liquid injection main hole by using external compression equipment, the two ends of the liquid injection main hole are in arc chamfer shapes, the outer diameter of the sealing element is reduced after deformation, the sealing element smoothly passes through the liquid injection main hole, the sealing element is propped upwards by the elastic element under the action of self elastic force, the sealing element is tightly contacted with the bottom of the liquid injection main hole, the liquid injection main hole is sealed, and the defect that the sealing pin is not attached due to deformation of the material of the traditional sealing pin is overcome;
the sealing member outer wall contacts with the rubber pad, and the sealing member is the same with the rubber pad, and frictional force is great between the two, and the sliding condition is difficult for appearing, can guarantee the leakproofness, reaches sealed effect.
2. Because the side wall of the liquid injection main hole is arc-shaped chamfer, burrs are not easy to generate, the shape of the outer wall of the sealing element is matched with the shape of the arc-shaped chamfer of the port, and even if the sealing element passes through the port, the inner wall of the liquid injection main hole is not scratched, and burrs are not generated on the inner wall of the liquid injection main hole.
Drawings
The utility model is further described with reference to the following description of the drawings.
FIG. 1 is a schematic diagram illustrating the overall structure of the present utility model;
FIG. 2 is a schematic view of a seal structure of the present utility model;
FIG. 3 is an assembled front view of the overall structure of the present utility model;
FIG. 4 is a schematic view of the structure of the present utility model at A in FIG. 3;
FIG. 5 is a schematic view showing the separation of the top cover plate and the sealing member according to the present utility model;
FIG. 6 is a schematic view of the top cover plate and seal assembly of the present utility model;
FIG. 7 is a schematic diagram illustrating the assembly of the top cover plate and the sealing member according to the present utility model.
In fig. 1-7: top cover plate 1, main injection hole 101, pole 2, lower plastic 3, auxiliary injection hole 301, sealing element 4, and elastic element 401.
Detailed Description
In order that the above objects, features and advantages of the utility model will be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. The following examples are merely illustrative of the practice of the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the utility model is intended to cover modifications and variations without departing from the scope of the utility model.
Referring to fig. 1, a high-tightness battery top cover includes:
the top cover plate 1 and the lower plastic 3 are arranged on the bottom surface of the top cover plate 1, the lower plastic 3 is firstly assembled with the top cover plate 1, the lower plastic 3 is assembled with the top cover plate 1 through an ultrasonic hot melting column, the top cover plate 1 and the lower plastic 3 form a top cover structure, a pole column 2 and an explosion-proof valve are arranged on the surface of the top cover structure, a metal connecting sheet is arranged at the position, corresponding to the pole column 2, of the lower plastic 3, the top surface of the metal connecting sheet is connected with the pole column 2, the bottom surface is connected with the electrode lugs of the battery cell, the pole column 2 is connected with the battery cell through the metal connecting sheet, the explosion-proof valve consists of an aluminum sheet and a plastic film, the aluminum sheet is arranged on the surface of the top cover plate 1, and the plastic film is arranged above the aluminum sheet, so that the pressure relief effect can be achieved through the explosion-proof valve when the battery cell fires or explodes, and the internal pressure of the battery cell is reduced;
the top cover assembly and the battery cell aluminum shell are installed, the surface of the top cover plate 1 is provided with a liquid injection main hole 101, electrolyte is injected into the battery cell through the liquid injection main hole 101, the surface of the lower plastic 3 is provided with a liquid injection auxiliary hole 301 corresponding to the liquid injection main hole 101, the electrolyte enters the liquid injection auxiliary hole 301 through the liquid injection main hole 101, the center of the liquid injection auxiliary hole 301 is provided with a permeation hole, and the electrolyte seeps out from the permeation hole.
Referring to fig. 1 to 7, after the filling is completed, the filling main hole 101 is sealed:
the sealing structure is arranged in the liquid injection auxiliary hole 301, the sealing structure comprises a sealing piece 4 and an elastic piece 401, the sealing structure is integrally placed in the liquid injection main hole 101, the elastic piece 401 faces downwards (as shown in fig. 5), the outer diameter of the elastic piece 401 is smaller than the inner diameters of the liquid injection main hole 101 and the liquid injection auxiliary hole 301, and therefore the elastic piece 401 firstly penetrates through the liquid injection main hole 101 and enters the liquid injection auxiliary hole 301;
further, the outer diameter of the sealing element 4 is larger than the inner diameter of the liquid injection main hole 101, and after the elastic element 401 enters the liquid injection auxiliary hole 301, the outer wall of the sealing element 4 props against the end part of the liquid injection main hole 101;
the sealing element 4 is pushed into the liquid injection main hole 101 by using external compression equipment, the two port positions of the liquid injection main hole 101 are arc chamfer-shaped (as shown in fig. 4 and 5), the sealing element 4 is in a sphere, the shape of the outer wall of the sealing element 4 is matched with the shape of the arc chamfer position of the port, the sealing element 4 and the port arc chamfer-shaped position are not propped against each other, friction force is reduced, the sealing element 4 is made of a rubber material, preferably a rubber material, any deformable and rebounding rubber material can be used for manufacturing the sealing element 4, the sealing element 4 can be guided into the liquid injection main hole 101 through the arc chamfer position of the liquid injection main hole 101, the outer diameter of the sealing element 4 is reduced after deformation, the sealing element 4 smoothly passes through the liquid injection main hole 101, the sealing element 4 enters the liquid injection auxiliary hole 301, and the liquid injection auxiliary hole 301 is in a sinking state and can accommodate the sealing element 4;
the inner diameter of the liquid injection main hole 101 is smaller than that of the liquid injection auxiliary hole 301, the top of the sealing element 4 is propped against a port at the bottom of the liquid injection main hole 101 after entering the liquid injection auxiliary hole 301 (as shown in fig. 6), the elastic element 401 is positioned in the liquid injection auxiliary hole 301, the elastic element 401 preferably adopts a spring structure, when the sealing element 4 enters the liquid injection auxiliary hole 301, the elastic element 401 is compressed, the connecting position of the sealing element 4 and the elastic element 401 is concave, the compressed elastic element 401 is accommodated in the concave position, the sealing element 4 is propped upwards due to the elastic force of the elastic element 401, so that the sealing element 4 is tightly contacted with the bottom of the liquid injection main hole 101, and the liquid injection main hole 101 is sealed, thereby solving the defect that the traditional sealing nail material is deformed to cause non-lamination;
the one end port that annotates liquid main hole 101 towards annotating liquid auxiliary hole 301 is equipped with the rubber pad, and sealing member 4 outer wall contacts with the rubber pad, and sealing member 4 is the same with the rubber pad, and frictional force is great between the two, is difficult for appearing gliding condition, can guarantee the leakproofness, reaches sealed effect.
For the assembly of the seal 4, the utility model also provides another embodiment:
as shown in fig. 7, the end of the elastic member 401 is fixed at the position of the auxiliary hole 301 near the penetrating hole, the sealing member 4 is located above the main hole 101 in the initial state, the elastic member 401 pushes the sealing member 4 upwards, the pipeline of the liquid injection device is arranged on the surface of the top cover plate 1 and is located at the periphery of the main hole 101, the sealing member 4 is located in the pipeline, then liquid injection is performed, electrolyte enters the auxiliary hole 301 from the gap between the main hole 101 and the sealing member 4, after the liquid injection is finished, the sealing member 4 is pressed into the main hole 101 by adopting pressing equipment, the elastic member 401 is fixedly connected with the inner wall of the auxiliary hole 301, and the operation of placing the sealing member 4 is not needed, so that the working steps can be reduced, and the efficiency is improved.
Because annotate liquid main hole 101 limit wall is the arc chamfer, be difficult for producing the burr, can solve the burr and fall into the problem of electric core, and sealing member 4 is the spheroid, sealing member 4 outer wall shape and port arc chamfer position shape assorted, even sealing member 4 passes through from the port position, also can not annotate liquid main hole 101 inner wall fish tail, can not let annotate liquid main hole 101 inner wall production burr yet.
Claims (7)
1. A high tightness battery top cover, comprising:
a top cover plate (1), the surface of which is provided with a liquid injection main hole (101);
the lower plastic (3) is arranged on the bottom surface of the top cover plate (1), and a liquid injection auxiliary hole (301) corresponding to the liquid injection main hole (101) is formed in the surface of the lower plastic (3);
the sealing structure is arranged in the liquid injection auxiliary hole (301) and comprises a sealing piece (4) and an elastic piece (401), and the sealing piece (4) is made of rubber.
2. The high tightness battery top cover according to claim 1, wherein: the top cover plate (1) and the lower plastic (3) form a top cover structure, and a pole (2) and an explosion-proof valve are arranged on the surface of the top cover structure.
3. The high tightness battery top cover according to claim 1, wherein: the sealing element (4) is in the shape of a sphere.
4. The high tightness battery top cover according to claim 1, wherein: the auxiliary liquid injection hole (301) is in a sinking state, and a penetration hole is arranged in the center of the auxiliary liquid injection hole (301).
5. The high tightness battery top cover according to claim 1, wherein: the two ends of the liquid injection main hole (101) are arc chamfer-shaped, and a rubber pad is arranged at one end port facing the liquid injection auxiliary hole (301).
6. The high tightness battery top cover according to claim 5, wherein: the inner diameter of the liquid injection main hole (101) is smaller than that of the liquid injection auxiliary hole (301), the outer diameter of the sealing piece (4) is larger than that of the liquid injection main hole (101), and the outer wall of the sealing piece (4) is in contact with the rubber pad.
7. The high tightness battery top cover according to claim 1, wherein: the elastic piece (401) is positioned in the liquid injection auxiliary hole (301), and the connecting position of the sealing piece (4) and the elastic piece (401) is concave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320339290.7U CN219610703U (en) | 2023-02-28 | 2023-02-28 | High leakproofness's battery top cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320339290.7U CN219610703U (en) | 2023-02-28 | 2023-02-28 | High leakproofness's battery top cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219610703U true CN219610703U (en) | 2023-08-29 |
Family
ID=87758202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320339290.7U Active CN219610703U (en) | 2023-02-28 | 2023-02-28 | High leakproofness's battery top cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219610703U (en) |
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2023
- 2023-02-28 CN CN202320339290.7U patent/CN219610703U/en active Active
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