CN215418343U - Battery top cap - Google Patents
Battery top cap Download PDFInfo
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- CN215418343U CN215418343U CN202022875061.6U CN202022875061U CN215418343U CN 215418343 U CN215418343 U CN 215418343U CN 202022875061 U CN202022875061 U CN 202022875061U CN 215418343 U CN215418343 U CN 215418343U
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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
Abstract
The utility model provides a battery top cover which comprises a cover plate, an explosion-proof valve, an explosion-proof sheet and an explosion-proof protection sheet, wherein an explosion-proof hole is formed in the cover plate, the explosion-proof valve, the explosion-proof sheet and the explosion-proof protection sheet are all arranged in the explosion-proof hole, and the explosion-proof valve is positioned between the explosion-proof sheet and the explosion-proof protection sheet along the thickness direction of the cover plate, so that the explosion-proof valve is embedded in the middle of the cover plate; the explosion-proof piece is installed close to the bottom surface of the cover plate, and the explosion-proof protection piece is installed close to the top surface of the cover plate. The battery explosion-proof valve is embedded in the middle of the cover plate, and the explosion-proof sheet is installed in a manner of clinging to the cover plate, so that the battery space is saved.
Description
Technical Field
The utility model relates to the field of rechargeable batteries, in particular to a battery top cover.
Background
The lithium ion battery is used as the heart of a new energy automobile, and the safety of the lithium ion battery is very important. At present, square batteries account for more than 70% of the market of automobile lithium ion batteries, and a battery top cover is used for connection inside and outside the batteries, is an important part for battery insulation and safety protection, and has importance second to the battery core of the batteries.
At present in the industry, battery utmost point post and battery explosion-proof valve are fixed in the battery apron, and the battery utmost point post adopts utmost point post inner part and utmost point post outer part welded form more, and the explosion-proof piece of battery explosion-proof valve is in battery apron bottom, and the bellied protection casing of reuse protects, and this kind of fixed mode reduces the usable space of battery to a certain extent.
In view of the above, it is necessary to develop a battery top cover to save the battery space.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery top cover, wherein a battery explosion-proof valve is embedded in the middle of a battery cover plate, and an explosion-proof sheet is tightly attached to the battery cover plate to save the battery space.
The technical scheme for realizing the purpose of the utility model is as follows:
a battery top cover comprises a cover plate, an explosion-proof valve, an explosion-proof sheet and an explosion-proof protection sheet, wherein an explosion-proof hole is formed in the cover plate, the explosion-proof valve, the explosion-proof sheet and the explosion-proof protection sheet are all arranged in the explosion-proof hole, and the explosion-proof valve is positioned between the explosion-proof sheet and the explosion-proof protection sheet along the thickness direction of the cover plate, so that the explosion-proof valve is embedded in the middle of the cover plate;
the explosion-proof piece is installed close to the bottom surface of the cover plate, and the explosion-proof protection piece is installed close to the top surface of the cover plate.
The battery explosion-proof valve is embedded in the middle of the battery cover plate, and the explosion-proof sheet is installed in a manner of clinging to the battery cover plate, so that the battery space is saved.
In this embodiment, the explosion-proof cover further comprises an insulating member, the insulating member is tightly attached to the bottom surface of the cover plate, and a gap is formed between the insulating member and the explosion-proof sheet.
In this embodiment, the cover plate is further provided with a positive electrode unit and a negative electrode unit.
In this embodiment, the positive electrode unit and the negative electrode unit are located at both sides of the explosion-proof valve.
In this embodiment, the positive electrode unit includes a positive electrode terminal and a positive electrode insulating member, a positive electrode hole is formed in the cover plate, the positive electrode insulating member is installed in the positive electrode hole, and the positive electrode terminal penetrates through the positive electrode insulating member and is installed on the positive electrode insulating member.
In this embodiment, the positive electrode insulating member includes a positive electrode terminal seal mounted to the positive electrode hole and a positive electrode terminal seal protector, the positive electrode terminal penetrating through the positive electrode terminal seal and being mounted on the positive electrode terminal seal;
the positive terminal seal protector is located below the positive terminal seal, and the positive terminal seal protector is in contact with the insulator on the bottom surface of the cover plate.
In this embodiment, the negative electrode unit includes a negative electrode terminal and a negative electrode insulator, the cover plate is provided with a negative electrode hole, the negative electrode insulator is mounted in the negative electrode hole, and the negative electrode terminal penetrates through the negative electrode insulator and is mounted on the negative electrode insulator.
In this embodiment, the negative electrode insulating member includes a negative electrode terminal seal mounted to the negative electrode hole and a negative electrode terminal seal protector, the negative electrode terminal penetrating the negative electrode terminal seal and being mounted on the negative electrode terminal seal;
the negative terminal seal protector is located below the negative terminal seal, and the negative terminal seal protector is in contact with the insulator on the bottom surface of the cap plate.
In this embodiment, the battery further comprises a liquid injection unit, wherein the liquid injection unit is installed on the cover plate, and the liquid injection unit injects liquid into the battery.
In this embodiment, annotate the liquid unit including annotating liquid structure, sealed nail and plug, set up on the apron and annotate the liquid hole, annotate the liquid structure and install in annotating the liquid hole, the plug set up in annotate the inner chamber of liquid structure, sealed nail sets firmly annotate the upper surface of liquid structure, with the shutoff it annotates the inner chamber of liquid structure.
Compared with the prior art, the utility model has the beneficial effects that:
1. the battery explosion-proof valve is embedded in the middle of the cover plate, and the explosion-proof sheet is installed in a manner of clinging to the cover plate, so that the battery space is saved.
2. The parts of the battery top cover are designed by adopting independent building structural parts, and the cover plate is simple in structure and easy to assemble.
3. The positive terminal and the negative terminal are designed in an integrated structure, and the tab parts of the positive terminal and the negative terminal, which are connected with the battery, are designed in a large surface, so that the requirement that the tab of the battery is directly welded to the positive terminal or the negative terminal can be met. The utility model also reduces the battery transfer welding through the design of the novel battery pole and realizes the direct welding of the battery pole and the battery pole.
4. The negative terminal is made of copper-aluminum composite materials, a bottom bonding pad of the negative terminal is made of copper materials, a top bonding pad of the negative terminal is made of aluminum materials, and the negative terminal guarantees welding with a battery.
5. The negative terminal and the positive terminal are both provided with the clamping grooves, and the insulating part is clamped with the positive/negative terminal, so that the fixing strength of the positive/negative terminal can be effectively improved.
6. The explosion-proof valve of the utility model is used for discharging air pressure and solid splashes in the battery after the battery has an accident, the utility model independently designs an explosion-proof system, an explosion-proof sheet is arranged in the middle of the explosion-proof valve, the upper part of a top cover is protected by an upper explosion-proof valve protection sheet, and the interior of the explosion-proof sheet is protected by an insulating member explosion-proof valve protection member. The design of this structure has reduced the thickness of insulating part, improves battery inner space utilization.
7. The liquid injection unit is independently designed, the outer part of the liquid injection structural member is higher than the battery cover plate, and the inner part of the liquid injection structural member adopts a conical structure, so that the liquid injection of the battery is facilitated.
8. The liquid injection structural member can supplement electrolyte for the battery, the electrolyte of the battery is consumed after the battery is used for a certain performance, the service life of the battery is influenced, when the electrolyte is insufficient, the part of the liquid injection structural member exceeding the top cover is eliminated, the sealing nail can be taken out through negative pressure, then the electrolyte is injected, and the reverse sealing nail is adopted for welding.
9. The utility model can realize the liquid supplement of the battery and prolong the service life of the battery through the conical design of the independent battery liquid injection hole and the design of the top bulge.
Drawings
FIG. 1 is a exploded view of a battery top cap;
FIG. 2 is a schematic view of a cover plate;
FIG. 3 is a top view of a battery top cover;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic cross-sectional view of the explosion-proof valve and the liquid injection unit;
in the figure, 1, a cover plate; 101. a positive electrode hole; 102. a negative electrode hole; 103. an explosion-proof hole; 104. a liquid injection hole; 2. a positive electrode insulator; 2-1, a positive terminal seal; 2-2, a positive terminal sealing protector; 3. a positive terminal; 4. an insulating member; 5. a negative terminal; 6. a negative electrode insulator; 6-1, a negative terminal seal; 6-2, a negative terminal sealing protection piece; 8. an explosion-proof sheet; 9. an explosion-proof protection sheet; 10. injecting a liquid structural member; 11. sealing the nail; 12. a rubber plug.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the utility model, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The battery top cover provided by the embodiment of the utility model is applied to a lithium ion battery, and the lithium ion battery generally comprises a battery shell body and a battery top cover, wherein a battery cell module is arranged in the battery shell body, and the battery top cover is arranged at an opening of the battery shell body; the battery top cover is provided with a positive electrode unit and a negative electrode unit, one part of the positive electrode unit and the negative electrode unit penetrate through the battery top cover and are connected with the battery cell module positioned in the battery shell, the other part of the positive electrode unit and the negative electrode unit are positioned outside the battery top cover, the positive electrode unit of the lithium ion battery can be connected with the positive electrode unit of another lithium ion battery, and the negative electrode unit of the lithium ion battery can be connected with the negative electrode unit of another lithium ion battery.
Referring to fig. 1 to 5, an embodiment of the present invention provides a battery top cap, including a cover plate 1, an explosion-proof unit, a positive electrode unit, a negative electrode unit and a liquid injection unit, where the cover plate 1 is provided with an explosion-proof hole 103, the explosion-proof unit includes an explosion-proof valve, an explosion-proof sheet 8 and an explosion-proof protection sheet 9, the explosion-proof valve, the explosion-proof sheet 8 and the explosion-proof protection sheet 9 are all installed in the explosion-proof hole 103, and the explosion-proof valve is located between the explosion-proof sheet 8 and the explosion-proof protection sheet 9 along the thickness direction of the cover plate 1, so that the explosion-proof valve is embedded in the middle of the cover plate 1; the explosion-proof sheet 8 is arranged close to the bottom surface of the cover plate 1, and the explosion-proof protection sheet 9 is arranged close to the top surface of the cover plate 1.
The battery explosion-proof valve of the embodiment of the utility model is embedded in the middle of the battery cover plate 1, and the explosion-proof sheet 8 is tightly attached to the battery cover plate 1, thereby saving the battery space.
The cover plate 1 of the embodiment of the utility model is usually made of aluminum material, compared with other materials, the aluminum material has strong wear resistance, weather resistance and corrosion resistance, and in addition, the aluminum material can be suitable for most requirements to the maximum extent. Although the price of the aluminum shell is slightly higher than that of the steel shell, the aluminum shell has the advantages of rich resource supply, large construction scale, advanced process, small environmental influence, energy conservation, emission reduction and high profit capacity, so the aluminum cover plate of the lithium battery is better than the steel cover plate. In addition, the cover plate 1 of the embodiment of the utility model is made of aluminum material, and the aluminum material has good heat dissipation and good safety.
In some embodiments, the positive electrode unit and the negative electrode unit of the embodiments of the present invention have internal threads on the top portions thereof, and have internal roller groove structures on the outer portions thereof, the internal roller groove structures being used for connecting and fixing the positive electrode unit and the negative electrode unit to the cover and the insulator, and the internal threads are provided to facilitate coupling between the batteries.
The casing of battery top cap below is square aluminum casing, passes through laser welding between the border of top cap and the aluminum casing, with its welding together, has anodal ear, negative pole ear, battery body, malary membrane on the electric core, and the anodal ear of battery welds with anodal unit, and the negative pole ear welds with negative pole unit.
The square aluminum shell is internally provided with a battery cell, the battery cell comprises a battery cell body, a battery cell negative terminal and a battery cell positive terminal, and the battery cell body is simultaneously connected with the battery cell negative terminal and the battery cell positive terminal. The positive terminal of the battery cell is connected with the positive unit, and the negative terminal of the battery cell is connected with the negative unit.
The explosion-proof vent valve provided by the embodiment of the utility model can quickly relieve pressure, prevent overflow and burst, and is waterproof and dustproof and is special for the battery. The microporous membrane is welded in the explosion-proof ventilation valve, so that the liquid is corrosion resistant, and the chemical liquid can be prevented from leaking or being polluted by the external liquid in a normal state. The internal pressure critical internal balance shell internal and external stress through bidirectional ventilation; when the internal pressure reaches a critical value, the explosion-proof vent valve can also be automatically communicated with the outside, and the problems of rapid ventilation, pressure release and explosion prevention are solved, thus solving the abnormal self-explosion problem of the power supply/battery.
The explosion-proof sheet 8 of the embodiment of the utility model is welded in the explosion-proof part, the explosion-proof valve is welded on the cover plate 1, and the explosion-proof protection sheet 9 is attached to the upper part of the explosion-proof valve.
In the present embodiment, referring to fig. 1, fig. 2 and fig. 3, the battery top cap further includes an insulating member 4, the insulating member 4 is tightly attached to the bottom surface of the cover plate 1, and a gap is formed between the insulating member 4 and the explosion-proof plate 8. According to the embodiment of the utility model, a gap exists between the insulating part 4 and the explosion-proof sheet 8, and the gap between the insulating part 4 and the explosion-proof sheet 8 mainly aims to prevent the insulating part 4 from applying pressure to the explosion-proof sheet 8, so that the explosion-proof sheet 8 is enabled to lose efficacy or reduce the pressure bearing capacity.
The insulating member 4 of the embodiment of the present invention is an integral structure, the insulating member 4 is provided with a positive terminal portion, a negative terminal portion and an explosion-proof valve portion, the positive insulating member 2 is installed in a gap between the positive terminal portion and the positive unit, and the negative insulating member 6 is installed in a gap between the negative terminal portion and the negative unit. The positive electrode insulator 2 preferably includes a positive electrode terminal seal 2-1 and a positive electrode terminal seal protector 2-2, and the negative electrode insulator 6 preferably includes a negative electrode terminal seal 6-1 and a negative electrode terminal seal protector 6-2, the positive electrode terminal seal 2-1 and the negative electrode terminal seal 6-1 being mounted at a gap, and the negative electrode terminal seal protector 6-2 and the positive electrode terminal seal protector 2-2 protecting the negative electrode terminal seal 6-1 and the positive electrode terminal seal 2-1.
The other function of the gap is that the insulating part 4 has an adjusting space when expanding with heat and contracting with cold; the insulating part 4 adopts an integrated structure, so that the processing procedures are reduced, the production cost can be effectively reduced, and the production efficiency is improved.
In this embodiment, referring to fig. 1 and 3, a positive electrode unit and a negative electrode unit are further mounted on the cover plate 1. Preferably, the positive electrode unit and the negative electrode unit are located at both sides of the explosion-proof valve.
The explosion-proof setting of the embodiment of the utility model is arranged at the positive center of the battery and comprises the following points 1, balancing the pressure discharge inside the battery, 2, designing the battery pole ear of the battery, in order to reasonably control the current balance of the battery pole and the distance between the battery poles of the positive pole, designing the terminals at the two ends of the battery, and 3, facilitating the connection between modules at the two sides of the battery terminal during the assembly of the battery; the explosion-proof valve is thus designed in the middle of the terminals. As the end face of the cell lengthens, multiple explosion-proof valves are designed.
In this embodiment, the positive electrode unit includes a positive electrode terminal 3 and a positive electrode insulator 2, a positive electrode hole 101 is formed in the cover plate 1, the positive electrode insulator 2 is mounted in the positive electrode hole 101, and the positive electrode terminal 3 penetrates through the positive electrode insulator 2 and is mounted on the positive electrode insulator 2.
The positive terminal 3 at the present stage has shapes of a circle, a polygon, a square, a rectangle and the like, and different protection measures are designed on various shapes; the internal and external linking mode is characterized in that an upper pole, a lower pole and a linking column are welded to form a plurality of structures.
In the present embodiment, referring to fig. 4, the positive insulating member 2 includes a positive terminal sealing member 2-1 and a positive terminal sealing protection member 2-2, the positive terminal sealing member 2-1 is installed in the positive hole 101, and the positive terminal 3 penetrates through the positive terminal sealing member 2-1 and is installed on the positive terminal sealing member 2-1; the positive terminal seal protector 2-2 is located below the positive terminal seal 2-1, and the positive terminal seal protector 2-2 is in contact with the insulator 4 on the bottom surface of the cap plate 1.
In this embodiment, referring to fig. 4, the negative electrode unit includes a negative electrode terminal 5 and a negative electrode insulating member 6, a negative electrode hole 102 is formed in the cover plate 1, the negative electrode insulating member 6 is mounted in the negative electrode hole 102, and the negative electrode terminal 5 penetrates through the negative electrode insulating member 6 and is mounted on the negative electrode insulating member 6.
The negative terminal 5 at the present stage has a shape of a circle, a polygonal row, a square, a rectangle, and the like, and different protection measures are designed in various shapes; the internal and external linking mode is characterized in that an upper pole, a lower pole and a linking column are welded to form a plurality of structures.
In the present embodiment, the negative electrode insulating member 6 includes a negative electrode terminal seal 6-1 and a negative electrode terminal seal protector 6-2, the negative electrode terminal seal 6-1 is mounted to the negative electrode hole 102, and the negative electrode terminal 5 penetrates the negative electrode terminal seal 6-1 and is mounted on the negative electrode terminal seal 6-1; the negative terminal seal protector 6-2 is located below the negative terminal seal 6-1, and the negative terminal seal protector 6-2 is in contact with the insulator 4 on the bottom surface of the cap plate 1.
In the present embodiment, referring to fig. 1 and fig. 3, the liquid injection unit is mounted on the cover plate 1, and the liquid injection unit injects liquid into the battery.
When the battery is injected, the negative pressure is firstly pumped by the injection equipment from the injection hole 104, the injection is carried out, and the injection is stopped after the injection amount reaches the set value. Then the rubber plug 12 is plugged into the liquid injection hole 104 to plug the liquid injection hole 104, finally the upper part of the liquid injection hole 104 is cleaned, and the seal nail 11 and the upper part of the liquid injection hole 104 are welded together by laser.
In this embodiment, please refer to fig. 5, the liquid injection unit includes a liquid injection structural member 10, a sealing nail 11 and a rubber plug 12, a liquid injection hole 104 is formed in the cover plate 1, the liquid injection structural member 10 is installed in the liquid injection hole 104, the rubber plug 12 is disposed in an inner cavity of the liquid injection structural member 10, and the sealing nail 11 is fixedly disposed on an upper surface of the liquid injection structural member 10 to seal the inner cavity of the liquid injection structural member 10.
The explosion-proof valve passes through the explosion-proof valve hole of the cover plate 1 and is welded with the cover plate 1, the explosion-proof piece 8 is welded with the explosion-proof valve in the center of the explosion-proof valve, the explosion-proof piece 8 is bonded on the upper part of the explosion-proof valve, the explosion-proof piece 8 is protected, and the explosion-proof valve protection structural part of the insulating part 4 is connected with the explosion-proof valve through a clamping groove to protect the explosion-proof piece 8. The liquid injection structure 10 and the cover plate 1 are welded with each other to form a liquid injection structure, and the sealing nail 11 is welded on the liquid injection structure to seal the liquid injection structure. When electrolyte is supplemented, the upper part of the liquid injection mechanism part is cut off, liquid is supplemented, and then the sealing nail 11 is reversely welded on the liquid injection structure part 10. The insulating part 4 is provided with an insulating part 4 positive pole hole 101, an insulating part 4 negative pole hole 102 and an insulating part 4 liquid injection hole 104, and the insulating part 4 explosion-proof valve protection structural part has the insulation between the protection cover plate 1 and the battery.
The plug 12 is located and annotates liquid structure 10, and the battery is annotated the liquid back, plugs electric core, and the inside and electric portion of separation electric core, sealed nail 11 welding and annotate liquid mechanism spare upper portion welding realize annotating the sealed of liquid hole 104.
When the liquid is replenished to the battery, the upper parts of the sealing nail 11 and the liquid injection mechanism are cut off, the residue of the sealing nail 11 is removed, the needle type liquid replenishing appliance penetrates through the rubber plug 12 to replenish the liquid, and the liquid replenishing is performed by firstly adopting negative pressure (vacuumizing) at positive pressure. After the electrolyte is supplemented, the sealing nail 11 is welded with the upper part of the liquid injection mechanism part to complete the battery sealing.
And after the battery is subjected to new liquid supplement, welding the liquid supplement sealing nail 11 with the lower part of the liquid injection structural mechanism to finish liquid supplement sealing. The welding disc at the bottom of the positive terminal 3 and the welding disc at the bottom of the negative terminal 5 of the cover plate 1 are respectively welded with the lug of the battery core, so that the current existing switching is reduced, and the welding is carried out on the welding disc of the terminal.
The battery explosion-proof valve is embedded in the middle of the cover plate 1, and the explosion-proof sheet 8 is installed to be close to the cover plate 1, so that the battery space is saved. The parts of the battery top cover of the embodiment of the utility model are designed by adopting independent building structural parts, and the cover plate 1 has a simple structure and is easy to assemble. According to the embodiment of the utility model, the positive terminal 3 and the negative terminal 5 are in an integrated structure design, and the tab parts of the battery connected on the positive terminal 3 and the negative terminal 5 are in a large-area design, so that the requirement that the tab of the battery is directly welded on the positive terminal 3 or the negative terminal 5 can be met. The embodiment of the utility model also reduces the battery transfer welding through the design of the novel battery pole and realizes the direct welding of the battery pole and the battery pole. According to the embodiment of the utility model, the negative terminal 5 is made of a copper-aluminum composite material, the bottom bonding pad of the negative terminal 5 is made of a copper material, the top bonding pad of the negative terminal 5 is made of an aluminum material, and the negative terminal 5 ensures welding with a battery.
The battery top cover can be directly welded on a battery pole when a plurality of electric core welding terminals are welded, the number of adapter pieces adopted in the conventional battery production process is reduced, the battery cost is saved, and the battery liquid injection hole 104 and the battery liquid injection cap of the battery top cover can realize liquid supplement after the battery is circulated and prolong the service life of the battery. The square battery top cover of the utility model comprises: 3 insulators 4 of positive terminal, positive terminal 3, insulator 4, negative terminal 5, 5 insulators 4 of negative terminal, explosion-proof valve, explosion-proof piece 8, explosion-proof valve screening glass, annotate liquid structure spare 10, sealed nail 11, structure such as plug 12. The negative terminal 5 and the positive terminal 3 of the embodiment of the utility model are both provided with the clamping grooves, and the insulating part 4 is clamped with the positive/negative terminal 5, so that the fixing strength of the positive/negative terminal 5 can be effectively improved. The embodiment of the utility model has the advantages that the explosion-proof valve is an explosion-proof system independently designed, the explosion-proof sheet 8 is arranged in the middle of the explosion-proof valve, the upper part of the top cover is protected by the upper explosion-proof valve protection sheet, and the inside of the explosion-proof sheet 8 is protected by the insulation member 4 and the explosion-proof valve protection member. The design of this structure has reduced the thickness of insulating part 4, improves battery inner space utilization. The liquid injection unit of the embodiment of the utility model adopts an independent design, the outer part of the liquid injection structural member 10 is higher than the battery cover plate 1, and the inner part of the liquid injection structural member 10 adopts a conical structure, thereby being beneficial to the liquid injection of the battery. The liquid injection structural member 10 of the embodiment of the utility model can supplement electrolyte for the battery, the electrolyte of the battery is consumed after the battery is used for a certain performance, the service life of the battery is influenced, when the electrolyte is insufficient, the part of the liquid injection structural member 10 exceeding the top cover is eliminated, the sealing nail 11 can be taken out through negative pressure, then the electrolyte is injected, and the reverse sealing nail 11 is adopted for welding. The embodiment of the utility model can realize the liquid supplement of the battery and prolong the service life of the battery by the independent conical design and the top convex design of the battery liquid injection hole 104.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A battery top cover is characterized by comprising a cover plate, an explosion-proof valve, an explosion-proof sheet and an explosion-proof protection sheet, wherein an explosion-proof hole is formed in the cover plate, the explosion-proof valve, the explosion-proof sheet and the explosion-proof protection sheet are all arranged in the explosion-proof hole, and the explosion-proof valve is positioned between the explosion-proof sheet and the explosion-proof protection sheet along the thickness direction of the cover plate, so that the explosion-proof valve is embedded in the middle of the cover plate;
the explosion-proof piece is installed close to the bottom surface of the cover plate, and the explosion-proof protection piece is installed close to the top surface of the cover plate.
2. The battery top cap of claim 1, further comprising an insulator, wherein the insulator is in close proximity to the bottom surface of the cover plate, and wherein a gap is provided between the insulator and the rupture disk.
3. The battery top cap of claim 1, wherein the cover plate further has a positive electrode unit and a negative electrode unit mounted thereon.
4. The battery top cap of claim 3, wherein the positive electrode unit and the negative electrode unit are located on either side of the explosion-proof valve.
5. The battery top cap of claim 3, wherein the positive electrode unit comprises a positive electrode terminal and a positive electrode insulator, wherein a positive electrode hole is formed in the cover plate, the positive electrode insulator is mounted in the positive electrode hole, and the positive electrode terminal penetrates through the positive electrode insulator and is mounted on the positive electrode insulator.
6. The battery top cap of claim 5, wherein the positive insulator comprises a positive terminal seal and a positive terminal seal protector, the positive terminal seal being mounted to the positive aperture, the positive terminal extending through the positive terminal seal and being mounted on the positive terminal seal;
the positive terminal seal protector is located below the positive terminal seal, and the positive terminal seal protector is in contact with the insulator on the bottom surface of the cover plate.
7. The battery top cap of claim 3, wherein the negative electrode unit comprises a negative electrode terminal and a negative electrode insulator, wherein the cover plate is provided with a negative electrode hole, the negative electrode insulator is arranged in the negative electrode hole, and the negative electrode terminal penetrates through the negative electrode insulator and is arranged on the negative electrode insulator.
8. The battery top cap of claim 7, wherein the negative insulator comprises a negative terminal seal and a negative terminal seal protector, the negative terminal seal being mounted to the negative aperture, the negative terminal extending through the negative terminal seal and being mounted on the negative terminal seal;
the negative terminal seal protector is located below the negative terminal seal, and the negative terminal seal protector is in contact with the insulator on the bottom surface of the cap plate.
9. The battery top cap of claim 1, further comprising a liquid injection unit mounted on the cover plate, the liquid injection unit injecting liquid into the battery.
10. The battery top cap of claim 9, wherein the liquid injection unit comprises a liquid injection structure, a sealing nail and a rubber plug, the cover plate is provided with a liquid injection hole, the liquid injection structure is mounted on the liquid injection hole, the rubber plug is arranged in the inner cavity of the liquid injection structure, and the sealing nail is fixedly arranged on the upper surface of the liquid injection structure to block the inner cavity of the liquid injection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022875061.6U CN215418343U (en) | 2020-12-02 | 2020-12-02 | Battery top cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022875061.6U CN215418343U (en) | 2020-12-02 | 2020-12-02 | Battery top cap |
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| Publication Number | Publication Date |
|---|---|
| CN215418343U true CN215418343U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022875061.6U Active CN215418343U (en) | 2020-12-02 | 2020-12-02 | Battery top cap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377575A (en) * | 2022-09-28 | 2022-11-22 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery, battery pack and electric device |
| CN115425345A (en) * | 2022-09-28 | 2022-12-02 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery and single battery |
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2020
- 2020-12-02 CN CN202022875061.6U patent/CN215418343U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377575A (en) * | 2022-09-28 | 2022-11-22 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery, battery pack and electric device |
| CN115425345A (en) * | 2022-09-28 | 2022-12-02 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery and single battery |
| CN115377575B (en) * | 2022-09-28 | 2023-10-17 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery, battery pack and power utilization device |
| CN115425345B (en) * | 2022-09-28 | 2023-10-17 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery and single battery |
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