CN216671861U

CN216671861U - Utmost point post subassembly, battery top cap and battery

Info

Publication number: CN216671861U
Application number: CN202123388065.2U
Authority: CN
Inventors: 杨帆; 蒋治亿
Original assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Current assignee: Trina Energy Storage Solutions Jiangsu Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-03
Anticipated expiration: 2031-12-30

Abstract

The utility model relates to the technical field of new energy batteries, and particularly discloses a pole assembly, a battery top cover and a battery. The pole assembly comprises a pole and a plugging piece, the pole is provided with a liquid injection hole penetrating through the pole, and the hole wall of the liquid injection hole is provided with a thread; the plugging piece is in threaded connection with the liquid injection hole, and a sealing piece is arranged between the plugging piece and the liquid injection hole. According to the pole assembly provided by the utility model, the liquid injection hole is formed in the pole, so that the structure of the top cover of the battery can be simplified, and the subsequent liquid supplementing requirement can be met; the plugging piece is in threaded connection with the liquid injection hole, when liquid injection is needed, the plugging piece is taken down, the problem that impurities such as metal chips and the like enter the battery is solved, the use safety of the battery is improved, the plugging piece can be repeatedly utilized, resources are saved, and the environment is protected; realize sealing connection through the sealing member between shutoff piece and the notes liquid hole, improved the leakproofness of battery, after annotating the liquid and accomplish, twist once more the shutoff piece in annotating the liquid hole can.

Description

Utmost point post subassembly, battery top cap and battery

Technical Field

The utility model relates to the technical field of new energy batteries, in particular to a pole assembly, a battery top cover and a battery.

Background

Lithium ion batteries have the advantages of high energy density, small self-discharge, long cycle life and the like, and are currently widely applied to the fields of consumer electronics, power electric vehicles, energy storage and the like. The battery top cover plays a vital role in sealing and safety of the battery, and at present, the battery top cover mainly comprises a positive pole, a negative pole, lower plastic, an explosion-proof valve, a liquid injection hole and the like. In the production process of the battery, electrolyte is injected into the battery shell through the liquid injection hole on the top cover of the battery, and the infiltration and formation conditions can be directly reflected on the performance of the battery. With the continuous improvement of market demands, the requirements of people on the energy density of the battery are continuously improved, the structural design of the battery is close to the limit, but higher requirements on the infiltration of the pole piece and the stability of the surface of the pole piece are provided.

Along with the occurrence of the problem of recovery pressure caused by large retired quantity of the current batteries, the retired power batteries are utilized in a cascading manner, the service life of the batteries can be prolonged, the residual value of the batteries is fully exerted, new energy consumption is promoted, the recovery pressure caused by large retired quantity of the current batteries can be relieved, the industrial cost of the electric automobile is reduced, and the development of the new energy automobile industry is driven. However, the performance of the used battery is rapidly reduced due to the electrolyte starvation phenomenon, and the secondary fluid replacement of the battery is more and more required.

The structure of the battery top cover in the prior art can satisfy the fluid infusion once more to power battery, but need to cut the fluid infusion spare with the foreign object before the fluid infusion, can have metal debris to get into inside the battery when cutting, has the potential safety hazard, and this mode is also environmental protection not. In addition, the liquid injection hole in the prior art is a hole which is separately arranged on the top cover of the battery, so that the design procedures of the top cover are increased, and meanwhile, greater requirements are also put forward on the sealing performance of the battery. Therefore, it is desirable to provide a new structure to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pole component, a battery top cover and a battery, which simplify the structure of the battery top cover, meet the requirement of subsequent liquid supplement and improve the sealing property of the battery.

In order to achieve the purpose, the utility model adopts the following technical scheme:

there is provided a pole assembly comprising:

the post is provided with a liquid injection hole penetrating through the post, and the hole wall of the liquid injection hole is provided with a thread;

the plugging piece, the plugging piece with annotate the liquid hole spiro union, just the plugging piece with it is equipped with the sealing member to annotate between the liquid hole.

As a preferred technical solution of the above-mentioned post assembly, the post includes a conductive post and an insulating member covering the conductive post, and the conductive post is provided with the liquid injection hole.

As a preferable technical solution of the above-mentioned pole assembly, the liquid injection hole and the conductive post are coaxially arranged.

As a preferred technical scheme of the above pole assembly, the blocking piece comprises a threaded section and a smooth section, the hole wall of the liquid injection hole is provided with a threaded surface connected with the threaded section in a matched manner and a smooth surface matched with the smooth section, and the sealing piece is arranged on the smooth surface.

As an optimal technical scheme of the pole assembly, the sealing element comprises an elastic sealing ring, a mounting groove is formed in the smooth surface, the sealing ring is arranged in the mounting groove, and part of the sealing ring protrudes out of the mounting groove.

As a preferable technical scheme of the above pole assembly, the smooth section of the blocking piece is of a conical structure, and the smooth surface of the liquid injection hole is a conical surface.

As a preferable technical solution of the above pole assembly, the top of the blocking piece is provided with an operating part for screwing a tool.

The utility model provides a battery top cover, including top cover apron and two install in as above arbitrary item on the top cover apron utmost point post subassembly, one of them utmost point post subassembly is anodal, its annotate the liquid hole and annotate the liquid hole for the malleation, another utmost point post subassembly is the negative pole, its annotate the liquid hole and annotate the liquid hole for the negative pressure.

As a preferable technical solution of the above battery top cap, the two pole assemblies are arranged at intervals along the length direction of the top cap cover plate.

There is provided a battery comprising a battery top cap as described in any of the above.

The utility model has the beneficial effects that:

according to the pole post assembly provided by the utility model, the liquid injection hole is formed in the pole post, so that the structure of the top cover of the battery can be simplified, and the subsequent liquid supplementing requirement can be met; the plugging piece is in threaded connection with the liquid injection hole, when liquid injection is needed, the plugging piece is taken down, the problem that impurities such as metal chips and the like enter the battery is solved, the use safety of the battery is improved, the plugging piece can be repeatedly utilized, resources are saved, and the environment is protected; realize sealing connection through the sealing member between shutoff piece and the notes liquid hole, improved the leakproofness of battery, after annotating the liquid and accomplish, twist once more the shutoff piece in annotating the liquid hole can.

The battery top cover provided by the utility model has a simple structure, improves the sealing performance of the battery, implements positive pressure liquid injection at the positive pressure liquid injection hole, implements negative pressure liquid injection at the negative pressure liquid injection hole, reduces the regulation and control of the pressure in the battery shell, improves the liquid injection efficiency, reduces the respiration frequency of the liquid injection, and avoids the weld joint cracking of the welding part of the battery top cover and the battery shell.

Drawings

Fig. 1 is a schematic structural diagram of a pole provided in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a closure according to an embodiment of the present invention;

fig. 3 is a sectional view of a plugging member installed in a liquid filling hole according to an embodiment of the present invention;

fig. 4 is an exploded view of a partial structure of a top cap for a battery according to an embodiment of the present invention.

In the figure:

1. a pole column; 2. a blocking member; 3. a liquid injection hole; 4. a seal member;

11. a conductive post; 12. an insulating member;

21. a threaded segment; 22. a smooth section;

31. a threaded surface; 32. a smooth surface;

100. a top cover plate; 110. and (5) discharging the plastic part.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The structure to among the prior art, battery top cap can satisfy the fluid infusion once more to power battery, but need to cut the fluid infusion spare with the foreign object before the fluid infusion, probably have metal piece entering battery inside when cutting, have the potential safety hazard, and this mode is also environmental protection not. And the notes liquid hole among the prior art is the hole that sets up alone on the battery top cap, when increasing top cap design process, also provided the problem of bigger requirement to the leakproofness of battery, and this embodiment provides a utmost point post subassembly, battery top cap and battery in order to solve above-mentioned problem.

As shown in fig. 1-3, the terminal assembly provided by this embodiment includes a terminal 1, a liquid injection hole 3 penetrating through the terminal 1 is formed in the terminal 1, and the liquid injection hole 3 is formed in the terminal 1, so that the structure of the battery top cover can be simplified, and the subsequent liquid supplement requirement can be met. The wall of the liquid injection hole 3 is provided with threads, the plugging piece 2 is screwed in the liquid injection hole 3, when liquid injection is needed, the plugging piece 2 is taken down, the problem that impurities such as metal chips enter the interior of the battery is solved, the use safety of the battery is improved, and the plugging piece 2 can be repeatedly used, so that resources are saved and the battery is environment-friendly; realize sealing connection through sealing member 4 between shutoff piece 2 and the notes liquid hole 3, improved the leakproofness of battery, after annotating the liquid and accomplish, twist once more shutoff piece 2 in annotating liquid hole 3 can.

In this embodiment, the post 1 includes a conductive column 11 and an insulating member 12 covering the conductive column 11, and the liquid injection hole 3 is formed in the conductive column 11. When installing utmost point post 1, insulating part 12 is connected with treating the installed part, and insulating part 12 can avoid leading electrical pillar 11 and electrically conducting with other parts.

The insulating member 12 is a member having a step structure, and when the member is mounted, the portion having a small sectional area penetrates through the top cover plate, and the portion having a large sectional area abuts against the lower surface of the top cover plate, thereby performing a function of limiting mounting.

Annotate liquid hole 3 and lead the coaxial setting of electrical pillar 11, guarantee to lead the structural strength of electrical pillar 11, and be convenient for inject the electrolyte into the battery to soak electric core.

In this embodiment, the plugging member 2 includes a threaded section 21 and a smooth section 22, the hole wall of the liquid injection hole 3 is provided with a threaded surface 31 engaged with the threaded section 21 and a smooth surface 32 engaged with the smooth section 22, and the sealing member 4 is disposed on the smooth surface 32. When installation shutoff piece 2, twist soon shutoff piece 2 in annotating liquid hole 3, screw thread section 21 is connected with the screw surface 31 cooperation, and sealing member 4 butt is on smooth section 22 to the gap between sealed smooth section 22 and the smooth surface 32 avoids electrolyte to outwards flow through annotating liquid hole 3, and simple structure, and sealing performance is good.

Further, the sealing member 4 comprises an elastic sealing ring which can be elastically deformed to achieve good sealing performance and facilitate installation of the block piece. Be equipped with the mounting groove on the smooth surface 32, the sealing washer sets up in the mounting groove, and partial sealing washer protrusion in mounting groove to with shutoff piece 2 butt. The sealing ring may be adhered to the mounting groove or welded to the mounting groove, and is not limited in this respect.

In order to facilitate the installation of the plugging member 2 and avoid damaging the sealing ring during the installation, so as to ensure good sealing performance, in this embodiment, the smooth section 22 of the plugging member 2 is of a conical structure, and the smooth surface 32 of the liquid injection hole 3 is a conical surface. When shutoff piece 2 contacted with sealing member 4, the inclined plane of conical structure and the oblique contact of sealing member 4 can not be directly to bulldozing sealing member 4 to guarantee the installation intensity of sealing member 4 and the life of sealing member 4, the conical structure has played the excessive effect of buffering, has reduced the installation degree of difficulty of shutoff piece 2.

In another embodiment, the smooth section 22 of the closure member 2 is of cylindrical configuration and the smooth surface 32 of the pour hole 3 is an annular surface. The diameter of the smooth section 22 may be the same as the diameter of the threaded section 21, or may be smaller than the diameter of the threaded section 21, and is not particularly limited herein.

In order to facilitate mounting and dismounting of the block piece 2, in the present embodiment the top of the block piece 2 is provided with an operating portion for tool screwing. The operation portion can be a straight groove or a cross groove, and the screwdriver can be manually used to realize the installation and the disassembly.

As shown in fig. 4, the present embodiment further provides a battery top cover, the battery top cover includes a top cover plate 100 and two pole assemblies installed on the top cover plate 100, one of the pole assemblies is a positive pole, the liquid injection hole 3 of the positive pole assembly is a positive pressure liquid injection hole, the other pole assembly is a negative pole, and the liquid injection hole 3 of the negative pole assembly is a negative pressure liquid injection hole. When annotating the liquid in to the battery, annotate the liquid hole malleation through the malleation and annotate liquid, annotate liquid hole negative pressure through the negative pressure and annotate liquid, reduced the regulation and control to the pressure in the battery case, when having improved notes liquid efficiency, reduced the breathing number of times of annotating the liquid, avoid the welding seam fracture of battery top cap and battery case's welding position. After the liquid injection is finished, the plugging piece 2 is plugged at the liquid injection hole 3. And if liquid supplement is needed, taking out the plugging piece 2 and injecting liquid.

The two pole assemblies are arranged at intervals along the length direction of the top cover plate 100 so as to meet the requirement that the battery cell is uniformly infiltrated by electrolyte, and the electrolyte injection efficiency and the electrolyte infiltration effect are improved.

The battery top cover further comprises a lower plastic part 110, the top cover plate 100 is installed on the lower plastic part 110, the lower plastic part 110 is used for being connected with a battery shell, and the pole assembly penetrates through the top cover plate 100 and the lower plastic part 110. The lower plastic part 110 is made of plastic material to play an insulating role.

The battery top cover also comprises structures such as an explosion-proof valve and the like, and the structures are in the prior art and are not described in detail herein.

The embodiment also provides a battery, including foretell battery top cap, still include battery case, be equipped with electric core in the battery case, battery top cap sets up in battery case's opening part to sealed battery case pours into electrolyte into to the battery case through annotating liquid hole 3.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pole assembly, comprising:

the post (1), the post (1) is provided with a liquid injection hole (3) which penetrates through the post (1), and the hole wall of the liquid injection hole (3) is provided with a thread;

a plugging piece (2), the plugging piece (2) with annotate liquid hole (3) spiro union, just the plugging piece (2) with annotate and be equipped with sealing member (4) between liquid hole (3).

2. The pole assembly according to claim 1, wherein the pole (1) comprises a conductive post (11) and an insulating member (12) covering the conductive post (11), and the liquid injection hole (3) is formed in the conductive post (11).

3. A post assembly according to claim 2, characterized in that the infusion hole (3) is arranged coaxially with the conductive post (11).

4. The pole assembly of claim 1, wherein the blocking piece (2) comprises a threaded section (21) and a smooth section (22), the hole wall of the liquid injection hole (3) is provided with a threaded surface (31) matched and connected with the threaded section (21) and a smooth surface (32) matched and connected with the smooth section (22), and the sealing piece (4) is arranged on the smooth surface (32).

5. The pole assembly of claim 4, wherein the sealing member (4) comprises an elastic sealing ring, the smooth surface (32) is provided with a mounting groove, the sealing ring is arranged in the mounting groove, and part of the sealing ring protrudes out of the mounting groove.

6. A pole assembly according to claim 4, characterized in that the smooth section (22) of the block piece (2) is of conical configuration and the smooth surface (32) of the injection hole (3) is of conical shape.

7. Pole assembly according to claim 1, characterized in that the top of the closure piece (2) is provided with an operating part for the screwing of a tool.

8. A battery top cover, characterized in that, comprising a top cover plate (100) and two pole assemblies as in any one of claims 1 to 7 mounted on the top cover plate (100), wherein one of the pole assemblies is a positive pole, the liquid injection hole (3) is a positive pressure liquid injection hole, the other pole assembly is a negative pole, and the liquid injection hole (3) is a negative pressure liquid injection hole.

9. The battery top cap of claim 8, wherein the two pole assemblies are spaced apart along the length of the top cap cover (100).

10. A battery comprising a battery top cover according to any one of claims 8 to 9.