CN221009068U

CN221009068U - Battery top cover, battery and power utilization device

Info

Publication number: CN221009068U
Application number: CN202322760920.0U
Authority: CN
Inventors: 韦子勇; 潘启明; 余世鹏
Original assignee: Zhuonang New Energy Nanning Co ltd
Current assignee: Zhuonang New Energy Nanning Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-05-24
Anticipated expiration: 2033-10-13

Abstract

The battery top cover comprises a cover plate, an explosion-proof valve and two electrode column assemblies, wherein explosion-proof holes and two electrode column through holes are formed in the cover plate, the explosion-proof holes are formed between the two electrode column through holes, the two electrode column assemblies are correspondingly arranged on the two electrode column through holes, and the explosion-proof valve is arranged in the explosion-proof holes; the electrode column assembly is composed of an electrode column, a riveting block and a sealing ring, wherein a protruding structure is arranged on the sealing ring, the shape and the size of the protruding structure are matched with those of the through hole of the electrode column, a first through hole penetrating through the upper surface and the lower surface of the sealing ring is arranged on the protruding structure, the electrode column penetrates through the first through hole and then is riveted with the riveting block, and the sealing ring is arranged between the electrode column and the cover plate and is compressed with an elastic compression rate of 30% or higher.

Description

Battery top cover, battery and power utilization device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery top cover, a battery and an electric device.

Background

At present, along with the rapid development of new energy industry, new energy batteries are continuously developed towards the directions of reliable structure, simple working procedures, excellent performance and low cost. The existing battery top cover comprises parts such as a top cover plate, a positive pole column, a negative pole column, plastic on a positive pole, plastic on a negative pole, plastic under a positive pole, plastic under a negative pole, a sealing ring, an explosion-proof piece, a protection patch and the like, and because the parts are more, the structure is complex, and each part is inconvenient in assembly, the qualification rate of production is lower, the production cost of the whole top cover is higher, and the market competitiveness is lacked.

Disclosure of utility model

The utility model provides a battery top cover, a battery and an electric device, which only comprise electrode columns, riveting blocks and sealing rings to form an electrode column assembly, optimize the integral structure of the battery top cover, reduce upper plastic in the two electrode column assemblies, reduce the production cost of the product, improve the production efficiency and enhance the market competitiveness while ensuring the performance and the quality of the product.

According to a first aspect of the utility model, the utility model provides a battery top cover, which comprises a cover plate, an explosion-proof valve and two electrode post assemblies, wherein the cover plate is provided with an explosion-proof hole and two electrode post through holes, the explosion-proof hole is arranged between the two electrode post through holes, the two electrode post assemblies are correspondingly arranged on the two electrode post through holes, and the explosion-proof valve is arranged in the explosion-proof hole;

The electrode column assembly is composed of an electrode column, a riveting block and a sealing ring, wherein a protruding structure is arranged on the sealing ring, the shape and the size of the protruding structure are matched with those of the through hole of the electrode column, a first through hole penetrating through the upper surface and the lower surface of the sealing ring is arranged on the protruding structure, the electrode column penetrates through the first through hole and then is riveted with the riveting block, and the sealing ring is arranged between the electrode column and the cover plate and is compressed with an elastic compression rate of 30% or higher.

In the battery top cover according to an embodiment of the present utility model, the cover plate is provided with a first groove, the post through hole is formed in the middle of the first groove, and the structure of the first groove is adapted to the external structure of the sealing ring, so that the sealing ring can be accommodated in the first groove, and the protruding structure is inserted into the post through hole.

In the battery top cover according to an embodiment of the present utility model, the first groove and the seal ring have a rectangular shape.

In the battery top cover according to an embodiment of the utility model, the cover plate includes a top cover plate and a lower plastic, the top cover plate is laminated above the lower plastic, the sealing ring is disposed between the electrode column and the top cover plate, and the riveting block is disposed on a side of the lower plastic facing away from the top cover plate.

In the battery top cover according to an embodiment of the present utility model, a sink structure is disposed on a side of the top cover sheet facing the lower plastic, a boss structure is disposed on a side of the lower plastic facing the top cover sheet, and the boss structure is attached to the sink structure.

In the battery top cover according to an embodiment of the present utility model, the post through hole is formed in the middle of the countersink structure and penetrates through the boss structure.

In the battery top cover according to an embodiment of the utility model, the lower plastic is provided with a second groove on a side facing away from the top cover sheet, and the riveting block is accommodated in the second groove.

In the battery top cover according to an embodiment of the present utility model, the rivet block includes a negative electrode rivet block, and the negative electrode rivet block is made of a copper-aluminum composite plate or an alloy-aluminum plate.

According to a second aspect of the present utility model, there is also provided a battery comprising the battery top cover described above.

According to a third aspect of the present utility model, the present utility model also provides an electric device comprising the battery described above.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the application designs a battery top cover, a battery and an electric device, which comprises a cover plate, an explosion-proof valve and two electrode column assemblies, wherein the electrode column assemblies only comprise electrode columns, riveting blocks and sealing rings, and the upper plastic in the two electrode column assemblies is reduced so as to optimize the integral structure of the battery top cover, so that the product can ensure the performance and the quality, and meanwhile, the production cost of the product is reduced, the production efficiency is improved, and the market competitiveness is enhanced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a battery top cover according to an embodiment of the present application;

FIG. 2 is a schematic view of the battery top cover of FIG. 1 at another angle;

FIG. 3 is a schematic cross-sectional view of the battery cover plate of FIG. 1;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

Fig. 5 is an exploded view of the battery top cover of fig. 1.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is also to be understood that the terminology used in the description of the present utility model is for the purpose of describing the particular embodiments only, and it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. refer to the orientation or positional relationship as indicated on the basis of the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1 to 5, according to a first aspect of the present application, there is provided a battery top cover including a cover plate 10, an explosion-proof valve 40 and two electrode post assemblies 20, wherein the cover plate 10 is provided with an explosion-proof hole 113 and two electrode post through holes 111, the explosion-proof hole 113 is disposed between the two electrode post through holes 111, the two electrode post assemblies 20 are correspondingly mounted on the two electrode post through holes 111, and the explosion-proof valve 40 is mounted in the explosion-proof hole 113, so that the battery top cover has good explosion-proof performance and high safety, and can avoid explosion phenomena when the lithium battery is overcharged.

In this embodiment, the electrode column assembly 20 is composed of only an electrode column, a rivet block and a seal ring, the seal ring is provided with a protrusion structure 20b, and the shape and size of the protrusion structure 20b are adapted to the shape and size of the electrode column through hole 111, so as to prevent the seal ring from being displaced and losing the protection. The protruding structure 20b is provided with a first through hole penetrating through the upper surface and the lower surface of the sealing ring, the electrode column penetrates through the first through hole and then is riveted with the riveting block, the sealing ring is arranged between the electrode column and the cover plate and is compressed at an elastic compression rate of 30% or higher, the sealing ring is uniformly compressed when the electrode column and the riveting block are riveted, the sealing performance of the top cover of the battery is improved, and meanwhile, the insulating effect between the electrode column and the cover plate 10 can be met.

The electrode post assembly 20 includes a positive electrode post assembly 21 and a negative electrode post assembly 22, the positive electrode post assembly 21 is composed of a positive electrode post 211, a positive electrode riveting block 212 and a positive electrode sealing ring 213, the negative electrode post assembly 22 is composed of a negative electrode post 221, a negative electrode riveting block 222 and a negative electrode sealing ring 223, the positive electrode post 211 and the negative electrode post 221 are respectively provided with a riveting post 20a, and the shape and the size of the riveting post 20a are matched with those of the first through hole. When the battery top cover is assembled, the positive electrode sealing ring 213 and the negative electrode sealing ring 223 are correspondingly installed in the two electrode post through holes 111, then the positive electrode post 211 and the negative electrode post 221 are installed on the back cover plate 10 of the positive electrode sealing ring 213 and the negative electrode sealing ring 223, one of the riveting posts 20a penetrates through the first through hole to the bottom surface of the positive electrode riveting block 212, the other riveting post 20a penetrates through the first through hole to the bottom surface of the negative electrode riveting block 222, the two riveting posts 20a are respectively riveted with the positive electrode riveting block 212 and the negative electrode riveting block 222 through the riveting die, and finally the two riveting posts 20a are fixed with the positive electrode riveting block 212 and the negative electrode riveting block 222 through laser welding so as to further improve the mechanical strength of the electrode post assembly 20.

In this embodiment, the structure of the positive electrode post 211 is the same as the structure of the negative electrode post 221, and the structure of the positive electrode seal ring 213 is the same as the structure of the negative electrode seal ring 223, so that the positive electrode post 211 and the negative electrode post 221 can be shared by each other, and the positive electrode seal ring 213 and the negative electrode seal ring 223 can be shared by each other, so as to ensure the performance and quality of the battery top cover, reduce the production cost of the battery top cover, improve the production efficiency of the battery top cover, and enhance the market competitiveness of the battery top cover.

After the technical scheme is adopted, as the electrode column assembly 20 only consists of the electrode column, the riveting block and the sealing ring, other insulating parts, such as insulating parts arranged between the electrode column and the cover plate 10, are not needed, the insulation between the electrode column and the cover plate 10 can be directly ensured through the sealing ring, and meanwhile, the sealing effect can be realized. Compared with the technical scheme that the traditional battery top cover is composed of parts such as the cover plate 10, the electrode column, the insulating part, the sealing ring, the riveting block, the explosion-proof piece, the protection patch and the like, the application can optimize the whole structure of the electrode column assembly 20, reduce the insulating part between the electrode column and the cover plate 10 and reduce the complexity of the battery top cover in the assembly process; meanwhile, the qualification rate of the battery top cover in the production process can be improved, and the high production cost of the battery top cover caused by more parts and complex structure is avoided, so that the market competitiveness of the battery top cover is improved. In addition, the application also increases the sharing of parts in the battery top cover, ensures the product performance and quality of the battery top cover, further reduces the production cost of the battery top cover, improves the production efficiency of the battery top cover, and the like.

In an alternative embodiment, the cover plate 10 is provided with a first groove 112, the post through hole 111 is formed in the middle of the first groove 112, and the structure of the first groove 112 is matched with the external structure of the sealing ring, so that the sealing ring can be accommodated in the first groove 112, and the protruding structure is arranged in the post through hole in a penetrating manner, so that the sealing ring is prevented from being displaced in the riveting process to lose sealing and insulating effects, for example, the sealing ring is extruded in the riveting process to generate transverse deviation or movement.

The through-hole 111 includes a positive electrode hole 1111 and a negative electrode hole 1112, the number of the first grooves is two, the positive electrode hole 1111 is formed in the middle of one of the first grooves 112, the negative electrode hole 1112 is formed in the middle of the other first groove 112, the positive electrode seal ring 213 is accommodated in one of the first grooves 112, the protrusion structure 20b of the positive electrode seal ring 213 is inserted in the positive electrode hole 1111, the negative electrode seal ring 223 is accommodated in the other first groove 112, and the protrusion structure 20b of the negative electrode seal ring 223 is inserted in the negative electrode hole 1112. The electrode column comprises a positive electrode column 211 and a negative electrode column 221, the sealing ring comprises a positive electrode sealing ring 213 and a negative electrode sealing ring 223, and the riveting block comprises a positive electrode riveting block 212 and a negative electrode riveting block 222.

In an alternative embodiment, the shapes of the first groove 112 and the sealing ring are rectangular, so that after the sealing ring is accommodated in the first groove 112, the first groove 112 can limit the position of the sealing ring, ensure the matching position between the sealing ring and the cover plate 10, and simultaneously can pre-position the sealing ring and the post through hole 111 through the protruding structure 20b when the sealing ring is assembled, so that the sealing ring can be completely fixed in the first groove 112, and the assembly process of the battery top cover is simplified.

In an alternative embodiment, the cover plate 10 comprises a top cover plate 11 and a lower plastic 12, wherein the top cover plate 11 is laminated over the lower plastic 12, a sealing ring is arranged between the electrode column and the top cover plate 11, and a riveting block is arranged on the side of the lower plastic 12 facing away from the top cover plate 11.

In an alternative embodiment, the side of the top cover sheet 11 facing the lower plastic 12 is provided with a countersink structure, and the side of the lower plastic 12 facing the top cover sheet is provided with a boss structure 121, the boss structure 121 being in fit with the countersink structure.

In an alternative embodiment, a post through hole 111 is formed in the middle of the countersunk slot structure and extends through the boss structure 121.

In an alternative embodiment, a plurality of weight-reducing grooves may be further disposed on the lower plastic 12, and the specific dimensions of the weight-reducing grooves may be set according to actual needs. For example, when the weight of the lower plastic 12 is too heavy, the overall weight of the lower plastic 12 can be further reduced by increasing the groove depth of the weight increasing groove.

In an alternative embodiment, the lower plastic 12 is provided with a second recess on the side facing away from the top cover piece 11, in which second recess the rivet block is accommodated.

In an alternative embodiment, the negative electrode rivet 222 is a negative electrode rivet 222 made of a copper aluminum composite plate or an alloy aluminum plate.

Illustratively, the negative electrode rivet block 222 includes a negative electrode copper block 2222 and a negative electrode aluminum block 2221, the negative electrode copper block 2222 being stacked under the negative electrode aluminum block 2221.

In an alternative embodiment, the battery cover plate further includes a protective patch 30, and the protective patch 30 is fitted over the explosion proof hole 113 and is located outside the explosion proof valve 40.

Illustratively, the explosion-proof valve 40 is fixed in the explosion-proof hole 113 by laser welding and is located at a side of the top cover 11 facing the lower plastic 12, and the protective patch 30 is attached to a side of the top cover 11 facing away from the lower plastic 12, so as to prevent the electrolyte from penetrating into the explosion-proof valve 40 during the injection process, and pollute the explosion-proof valve 40.

In an alternative embodiment, the peripheral edge portion of the explosion-proof valve 40 may be attached to the annular inner wall of the explosion-proof hole 113, so that the explosion-proof valve 40 is firmly connected to the top cover sheet 11 by welding, so as to ensure that the explosion-proof valve 40 can completely cover the explosion-proof hole 113. It should be noted that, since the explosion-proof valve 40 is cracked when the internal pressure of the lithium battery exceeds a preset threshold, and is sealed in a normal state, it functions similarly to a valve or a switch.

In an alternative embodiment, the cover plate 10 is further provided with a liquid injection hole 114, and the liquid injection hole 114 is disposed in the middle of the two post through holes 111 and located at one side of the explosion proof hole 113. The shape of the filling hole 114 is circular, elliptical or polygonal.

In an alternative embodiment, the number of the injection holes 114 may be one or more, the one or more injection holes 114 are located between the explosion-proof hole 113 and one of the post through holes 111, the diameters of the plurality of injection holes 114 may be the same, and the diameters of the plurality of injection holes 114 may be different so as to inject the electrolyte into the cavity of the lithium battery case through the plurality of injection holes 113.

In an alternative embodiment, the cover plate 10 further includes a fill hole cap that can be sealingly coupled to the fill hole 114.

As shown in fig. 1 to 5, according to a second aspect of the present application, there is provided a battery including the battery top cover described above.

As shown in fig. 1 to 5, according to a third aspect of the present application, there is provided an electric device including the above-described battery.

In the description of the present application, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different structures of the application. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. The battery top cover is characterized by comprising a cover plate, an explosion-proof valve and two electrode column assemblies, wherein the cover plate is provided with an explosion-proof hole and two electrode column through holes, the explosion-proof hole is arranged between the two electrode column through holes, the two electrode column assemblies are correspondingly arranged on the two electrode column through holes, and the explosion-proof valve is arranged in the explosion-proof hole;

2. The battery top cover according to claim 1, wherein a first groove is formed in the cover plate, the post through hole is formed in the middle of the first groove, the structure of the first groove is matched with the external structure of the sealing ring, the sealing ring can be accommodated in the first groove, and the protruding structure penetrates through the post through hole.

3. The battery top cover of claim 2, wherein the first groove and the sealing ring are rectangular in shape.

4. The battery top cover of claim 1, wherein the cover plate comprises a top cover plate and a lower plastic, the top cover plate is laminated above the lower plastic, the sealing ring is arranged between the electrode column and the top cover plate, and the riveting block is arranged on the side of the lower plastic opposite to the top cover plate.

5. The battery top cover of claim 4, wherein a side of the top cover sheet facing the lower plastic is provided with a sink structure, and a side of the lower plastic facing the top cover sheet is provided with a boss structure, and the boss structure is attached to the sink structure.

6. The battery top cover of claim 5, wherein the post through hole is formed in a middle portion of the countersink structure and penetrates the boss structure.

7. The battery top cover of claim 4, wherein the lower plastic is provided with a second recess on a side facing away from the top cover sheet, and the rivet block is received in the second recess.

8. The battery top cover of claim 1, wherein the rivet block comprises a negative rivet block made of a copper aluminum composite plate or an alloy aluminum plate.

9. A battery, characterized in that: the battery includes the battery top cover as claimed in any one of claims 1 to 8.

10. An electrical device, characterized in that: the power utilization device includes the battery as claimed in claim 9.