Multifunctional cover plate

Abstract

The utility model discloses a multifunctional cover plate, which belongs to the technical field of batteries, and comprises a substrate component, a first through hole and a second through hole are arranged on the substrate component at an interval; the positive electrode assembly is assembled in the first through hole and comprises a positive electrode post of which the axis is overlapped with the axis of the first through hole; the negative electrode assembly is assembled in the second through hole and comprises a negative electrode post, the axis of the negative electrode post coincides with the axis of the second through hole, and at least one of the positive electrode post and the negative electrode post is provided with a threaded hole which extends in the axial direction and forms a blind hole. According to the battery pack, the threaded hole which extends axially and forms the blind hole is formed in at least one of the positive pole and the negative pole to replace a threaded hole formed in an original aluminum bar, so that the space utilization rate of the battery pack is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a multifunctional cover plate. Background Art

[0002] With the rapid development of the new energy industry, the industry's requirements for power batteries are increasing day by day. Among them, the volume energy density of power batteries is a key index concerned by the industry; in the process of PACK assembly of traditional battery cell cover plates, threaded holes need to be drilled on the aluminum busbar, occupying the volume of the battery pack. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a multifunctional cover plate to solve the existing problems mentioned in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A multifunctional cover plate, comprising:

[0005] A substrate member, which has a first through hole and a second through hole arranged at intervals thereon;

[0006] A positive electrode assembly, assembled in the first through hole, and comprising a positive electrode pole column whose axis coincides with the axis of the first through hole;

[0007] A negative electrode assembly, assembled in the second through hole, and comprising a negative electrode pole column whose axis coincides with the axis of the second through hole, and at least one of the positive electrode pole column and the negative electrode pole column is provided with a threaded hole that axially extends and forms a blind hole.

[0008] By providing a threaded hole that axially extends and forms a blind hole on at least one of the positive electrode pole column and the negative electrode pole column to replace the threaded hole opened on the original aluminum busbar, the space utilization rate of the battery pack is improved.

[0009] Preferably, both the first through hole and the second through hole include a main body section and a first groove section and a second groove section respectively located at both axial ends of the main body section, and the cross-sections of the first groove section and the second groove section are larger than the cross-section of the main body section.

[0010] Preferably, both the positive electrode assembly and the negative electrode assembly include:

[0011] An insulating gasket, assembled in the first groove section;

[0012] A steel gasket, assembled inside the insulating gasket;

[0013] A sealing member, assembled inside the second groove section.

[0014] Preferably, both the positive electrode pole column and the negative electrode pole column include:

[0015] A column body part, configured as an axially extending columnar structure;

[0016] The sheet part is formed at one end of the column part in the axial direction and is configured as a sheet structure.

[0017] Preferably, the sheet part of the negative electrode terminal is made of copper material, and the column part is made of aluminum material.

[0018] Preferably, the column part and the sheet part are connected by processes such as riveting or injection molding.

[0019] Preferably, a groove for accommodating the steel gasket is provided on the column part.

[0020] Preferably, the column part is configured as a cylindrical column or a polygonal column.

[0021] Preferably, the substrate member is made of a polymer material added with a heat conductive agent.

[0022] Preferably, the insulating gasket is made of a heat insulating material. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the cover plate explosion;

[0024] Figure 2 It is a schematic diagram of the cover plate assembly;

[0025] Figure 3 It is a schematic sectional view of the cover plate.

[0026] In the figure:

[0027] 100. Substrate member; 101. First through hole; 102. Second through hole; 103a. Main body section; 103b. First groove section; 103c. Second groove section;

[0028] 200. Positive electrode terminal; 201. Negative electrode terminal; 202a. Column part; 202b. Sheet part; 203. Insulating gasket; 204. Steel gasket; 205. Sealing member; 206. Threaded hole. Detailed Description of the Invention

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] A multifunctional cover plate (hereinafter referred to as the cover plate), refer to Figure 1, the main body is composed of a substrate member 100, a negative electrode assembly, and a positive electrode assembly. The substrate member 100 is made of a polymer material added with a heat-conducting agent, which can improve its heat-conducting performance while meeting the strength of the substrate member 100. At the same time, the substrate member 100 is provided with a first through hole 101 and a second through hole 102. The first through hole 101 and the second through hole 102 are respectively configured as assembly holes for the positive electrode assembly and the negative electrode assembly, that is, the positive electrode assembly and the negative electrode assembly are respectively assembled in the first through hole 101 and the second through hole 102, and the axes of the positive electrode assembly and the first through hole 101 and the axes of the negative electrode assembly and the second through hole 102 coincide. In some embodiments, the substrate member 100 is provided with a stepped hole at the center point position. At this time, the first through hole 101 and the second through hole 102 are respectively arranged on both sides of the stepped hole and are symmetrically arranged. In some embodiments, refer to Figure 1 , the positive electrode assembly includes a positive electrode terminal 200, and the negative electrode assembly includes a negative electrode terminal 201. Both the positive electrode terminal 200 and the negative electrode terminal 201 have a columnar portion 202a and a sheet portion 202b. The columnar portion 202a is configured as a columnar structure extending axially. Exemplarily, the columnar portion 202a can be configured as a cylindrical column or a polygonal column. Correspondingly, the sheet portion 202b is formed at one end of the columnar portion 202a in the axial direction and is configured as a sheet structure. Exemplarily, such as a circular sheet or a polygonal sheet. In some embodiments, the columnar portion 202a and the sheet portion 202b of the positive electrode terminal 200 and the negative electrode terminal 201 are connected by processes such as riveting or injection molding.

[0031] Refer to Figure 2 and 3 , corresponding to the structures of the positive electrode terminal 200 and the negative electrode terminal 201, the first through hole 101 and the second through hole 102 both include a main body section 103a, a first groove section 103b, and a second groove section 103c. The main body section 103a is configured as a circular hole structure extending along the axis. The first groove section 103b and the second groove section 103c are respectively located at both ends of the main body section 103a in the axial direction, that is, the first groove section 103b and the second groove section 103c are respectively configured as groove structures formed on both end faces of the substrate member 100, and the cross sections of the first groove section 103b and the second groove section 103c are larger than the cross section of the main body section 103a, that is, the first groove section 103b and the second groove section 103c are configured to extend radially outward relative to the main body section 103a.

[0032] In some embodiments, the above-mentioned positive electrode assembly and negative electrode assembly further include an insulating gasket 203, a steel gasket 204, and a sealing member 205. The insulating gasket 203 is assembled in the first groove section 103b and has a groove for accommodating the steel gasket 204, that is, the steel gasket 204 is assembled on the insulating gasket 203 and can serve as a riveting carrier to achieve the pressing of the insulating gasket 203. Further, the above-mentioned insulating gasket 203 is made of a heat-insulating material to avoid heat accumulation on the substrate member 100 after laser welding, so as to reduce the thermal deformation of the substrate member 100 and play a role of insulation and heat insulation. Refer to Figure 3 , the above-mentioned sealing member 205 is assembled in the second groove section 103c and is axially pressed through the sheet body part 202b of the positive electrode terminal 200 or the negative electrode terminal 201 during the assembly process.

[0033] In some embodiments, the above-mentioned negative electrode terminal 201 is made of a copper-aluminum composite material. Specifically, the sheet body part 202b of the negative electrode terminal 201 is made of copper material to avoid oxidation and corrosion of the negative electrode during the operation of the battery. Correspondingly, the column body part 202a of the negative electrode terminal 201 is made of aluminum material and is used for laser welding of the series-parallel busbars of the battery cells.

[0034] In some embodiments, at least one of the above-mentioned positive electrode terminal 200 and negative electrode terminal 201 is provided with a threaded hole 206 that axially extends and is configured as a blind hole to replace the threaded hole 206 opened on the original aluminum row, thereby improving the space utilization rate of the battery pack. Specifically, refer to Figure 3 , taking the threaded hole 206 opened on the positive electrode terminal 200 as an example for illustration, the threaded hole 206 is formed by axially extending from the end face of the column body part 202a of the negative electrode terminal 201 that is far from the sheet body part 202b.

[0035] In the description of the present invention, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present invention and the features of different embodiments or examples.

[0036] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A multifunctional cover plate, characterized in that: include: A substrate member having a first through hole and a second through hole spaced apart from each other; A positive electrode assembly, assembled in the first through hole, and comprising a positive electrode column whose axis coincides with the axis of the first through hole; The negative electrode assembly is assembled in the second through hole and comprises a negative electrode column whose axis coincides with the axis of the second through hole, and at least one of the positive electrode column and the negative electrode column is provided with an axially extending threaded hole forming a blind hole.

2. A multifunctional cover according to claim 1, characterized in that: The first through hole and the second through hole both include a main body section and a first groove section and a second groove section respectively located at two axial ends of the main body section, and the cross-sections of the first groove section and the second groove section are larger than the cross-section of the main body section.

3. A multifunctional cover according to claim 2, characterized in that: The positive electrode assembly and the negative electrode assembly both include: An insulating gasket, assembled in the first groove section; A steel gasket, assembled inside the insulating gasket; A sealing member is assembled in the second groove section.

4. A multifunctional cover according to claim 3, characterized in that: The positive electrode column and the negative electrode column both include: The column part is formed into a columnar structure extending axially; The sheet body portion is formed at one axial end of the column body portion and is configured as a sheet-like structure.

5. The multifunctional cover plate according to claim 4, characterized in that: The sheet body of the negative electrode column is made of copper material, and the column body is made of aluminum material.

6. The multifunctional cover plate according to claim 4, characterized in that: The column part and the sheet part are connected by riveting or injection molding process.

7. The multifunctional cover plate according to claim 4, characterized in that: The column part is provided with a groove for accommodating the steel gasket.

8. The multifunctional cover plate according to claim 4, characterized in that: The column part is configured as a cylindrical column or a polygonal column.

9. The multifunctional cover plate according to claim 1, characterized in that: The substrate component is made of a polymer material added with a thermal conductor.

10. The multifunctional cover plate according to claim 3, characterized in that: The insulating gasket is made of heat insulating material.

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