Battery cover plate

Abstract

The invention provides a battery cover plate structure, which is used in the technical field of batteries, and particularly relates to a battery cover plate, which comprises a cover plate assembly, the cover plate assembly comprises a substrate and a lower plastic arranged up and down, the surface of the substrate far away from the lower plastic is a first surface, and the surface of the lower plastic far away from the substrate is a second surface; the conductive assembly comprises a pole top plate, a pole body and a pole bottom plate, the pole top plate is arranged on one side of the first surface, the pole body is arranged in the first through hole of the substrate and the second through hole of the lower plastic in a penetrating manner, and the pole bottom plate is arranged on one side of the second surface; one end of the post body is integrally connected with the post top plate, and the other end of the post body is in threaded connection with the post bottom plate; or one end of the post body is in threaded connection with the post top plate, and the other end of the post body is integrally connected with the post bottom plate; and the pole bottom plate and the lower plastic are integrally formed. The conductive assembly connected with the thread structure of the battery cover plate is high in connection strength and small in overall height; the pole bottom plate and the lower plastic are integrally formed, so that the problems of battery self-discharge, internal short circuit and the like caused by metal wires at the edge of the conductive component can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cover. Background Art

[0002] The connection strength of the conductive components of existing battery covers is poor, the clamping performance of the cover components is not high, and the height of the entire conductive component is high, which affects assembly; in addition, the metal wires generated by scratches on the edges of the conductive components during the production process are easy to connect with the cover components and cause a short circuit, causing the risk of battery corrosion, leakage, and scrapping, thereby affecting the safety and stability of the battery. Summary of the Invention

[0003] In view of this, the present application provides a battery cover plate that uses a threaded structure to connect the conductive components, which has high connection strength and is conducive to reducing the height of the conductive components; the pole base plate and the lower plastic of the conductive component are integrally injection molded, which can improve the problems of battery self-discharge, internal short circuit, etc. caused by the generation of metal wires at the edge of the conductive component.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A battery cover, comprising:

[0006] The cover assembly includes a substrate and a lower plastic member disposed above and below, wherein the surface of the substrate away from the lower plastic member is a first surface, and the surface of the lower plastic member away from the substrate member is a second surface, the substrate is provided with a first through hole, and the lower plastic member is provided with a second through hole;

[0007] A conductive component, comprising a pole top plate, a column, and a pole bottom plate, wherein the pole top plate is arranged on one side of the first surface, the column is passed through the first through hole and the second through hole, and the pole bottom plate is arranged on one side of the second surface;

[0008] One end of the column is connected to the pole top plate in an integral manner, and the other end of the column is connected to the pole bottom plate in a threaded manner; or one end of the column is connected to the pole top plate in a threaded manner, and the other end of the column is connected to the pole bottom plate in an integral manner;

[0009] The pole bottom plate and the lower plastic are integrally injection-molded.

[0010] Optionally, the pole bottom plate includes a bottom plate top and a bottom plate bottom, the projection area of ​​the bottom plate top on the first surface is larger than the projection area of ​​the bottom plate bottom on the first surface, and the projection of the bottom plate bottom on the first surface falls within the projection outline of the top plate top on the first surface, and a step surface is formed between the bottom plate top and the bottom plate bottom, and the step surface is embedded in the lower plastic.

[0011] Optionally, the width W of the step surface satisfies: 0.5 mm ≤ W ≤ 5 mm.

[0012] Optionally, the column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole;

[0013] The threaded section is arranged below the middle section, a third through hole is provided on the pole bottom plate, the external thread of the threaded section is connected to the internal thread in the third through hole, the lower end surface of the threaded section is higher than the lower surface of the pole bottom plate, and the height difference H1 between the lower end surface of the threaded section and the lower surface of the pole bottom plate satisfies: H1 ≥ 0.2 mm.

[0014] Optionally, the column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole;

[0015] The threaded segment is arranged above the middle segment, a fourth through hole is provided on the pole top plate, the external thread of the threaded segment is connected to the internal thread in the fourth through hole, the upper end surface of the threaded segment is lower than the upper surface of the pole top plate, and the height difference H2 between the upper end surface of the threaded segment and the upper surface of the pole top plate satisfies: H2 ≥ 0.2 mm.

[0016] Optionally, the relationship between the axial length H3 of the thread segment and the axial length H4 of the external thread satisfies: 1 mm ≤ H4 ≤ H3.

[0017] Optionally, the column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole;

[0018] The threaded section is provided below the middle section, a third through hole is provided on the pole bottom plate, the external thread of the threaded section is connected to the internal thread in the third through hole, the axial length of the third through hole is H5, the axial length of the internal thread of the third through hole is H6, and the axial length H6 of the internal thread satisfies: 1mm≤H6≤H5, or,

[0019] The column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole;

[0020] The threaded section is arranged above the middle section, and a fourth through hole is provided on the pole top plate. The external thread of the threaded section is connected to the internal thread in the fourth through hole. The axial length of the fourth through hole is H7, and the axial length of the internal thread of the fourth through hole is H8. The axial length H8 of the internal thread satisfies: 1mm≤H8≤H7.

[0021] Optionally, the lower surface of the pole bottom plate protrudes from the lower surface of the lower plastic, and a height difference H9 between the lower surface of the pole bottom plate and the lower surface of the lower plastic satisfies: 0.1 mm ≤ H9 ≤ 1 mm.

[0022] Optionally, a sealing ring is further included, which is arranged between the substrate and the lower plastic and sleeved on the column; a positioning groove is also provided on the lower plastic, and the lower end face of the sealing ring can abut against the top surface of the column bottom plate and be clamped in the positioning groove.

[0023] Optionally, a vent groove extending to the lower plastic edge is provided radially of the positioning groove.

[0024] The battery cover provided in the present application utilizes a threaded structure to connect the conductive components, which has high connection strength and is conducive to reducing the height of the conductive components; the pole base plate and the lower plastic of the conductive components are integrally injection molded, which can improve problems such as battery self-discharge and internal short circuit caused by the generation of metal wires at the edge of the conductive components. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] Figure 1 The explosion of the battery cover embodiment 1 of this application Figure 1 ;

[0027] Figure 2 for Figure 1 Assembly drawing;

[0028] Figure 3 The explosion of the battery cover embodiment 1 of this application Figure 2 ;

[0029] Figure 4 for Figure 3 Assembly drawing;

[0030] Figure 5 A top view of the first embodiment of the battery cover of the present application;

[0031] Figure 6 for Figure 5 Middle AA section;

[0032] Figure 7 for Figure 6 Middle BB cross-section;

[0033] Figure 8 for Figure 6 Enlarged image in circle;

[0034] Figure 9 for Figure 6 Schematic diagram of the integrated pole top plate and pole body;

[0035] Figure 10 for Figure 6 Schematic diagram of the center pole base plate assembly;

[0036] Figure 11 for Figure 10 Enlarged image in circle;

[0037] Figure 12 This is an exploded view of the second embodiment of the battery cover of the present application;

[0038] Figure 13 for Figure 12 Assembly drawing;

[0039] Figure 14 A top view of the second embodiment of the battery cover of the present application;

[0040] Figure 15 for Figure 14 Middle AA section;

[0041] Figure 16 for Figure 15 Enlarged image in circle;

[0042] Figure 17 for Figure 15 Schematic diagram of the pole top plate in;

[0043] Figure 18 for Figure 15 Schematic diagram of the pole base plate assembly in;

[0044] Figure 19 for Figure 18 Enlarged image in circle.

[0045] exist Figures 1-19 middle:

[0046] 10. Base plate; 20. Lower plastic; 21. Vent; 30. Conductive component; 311. Pole top plate; 3111. Fourth through hole; 312. Middle section; 313. Threaded section; 32. Pole bottom plate; 321. Top of bottom plate; 322. Bottom of bottom plate; 323. Third through hole; 40. Upper plastic; 50. Sealing ring. DETAILED DESCRIPTION

[0047] The present application provides a battery cover plate that utilizes a threaded structure to connect conductive components, which has high connection strength and is conducive to reducing the height of the conductive components; the pole base plate and the lower plastic of the conductive component are integrally injection molded, which can improve problems such as battery self-discharge and internal short circuit caused by the generation of metal wires at the edge of the conductive component.

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] like Figures 1-11 The figure shows a first embodiment of a battery cover provided by the present application, which includes:

[0050] The cover assembly includes a substrate 10 and a lower plastic 20 arranged above and below. The surface of the substrate 10 away from the lower plastic 20 is a first surface, and the surface of the lower plastic 20 away from the substrate 10 is a second surface. The substrate 10 is provided with a first through hole, and the lower plastic 20 is provided with a second through hole.

[0051] The conductive component 30 includes a pole top plate 311, a column, and a pole bottom plate 32. The pole top plate 311 is arranged on one side of the first surface, the column is inserted into the first through hole and the second through hole, and the pole bottom plate 32 is arranged on one side of the second surface.

[0052] One end of the column is connected to the pole top plate 311 in an integral manner, and the other end of the column is threadedly connected to the pole bottom plate 32; or one end of the column is threadedly connected to the pole top plate 311, and the other end of the column is connected to the pole bottom plate 32 in an integral manner;

[0053] The pole bottom plate 32 and the lower plastic 20 are integrally injection-molded.

[0054] The battery cover of the present application utilizes a threaded structure to connect the conductive component 30, which has high connection strength and is conducive to reducing the height of the conductive component 30; the pole bottom plate 32 of the conductive component 30 and the lower plastic 20 are integrally injection molded, which can improve problems such as battery self-discharge and internal short circuit caused by the generation of metal wires at the edge of the conductive component 30.

[0055] In a preferred embodiment, Figure 6 、 Figure 8 and Figure 10 As shown, the pole bottom plate 32 includes a bottom plate top 321 and a bottom plate bottom 322 connected to each other. The projected area of ​​the bottom plate top 321 on the first surface is larger than the projected area of ​​the bottom plate bottom 322 on the first surface. In addition, the projection of the bottom plate bottom 322 on the first surface falls within the projection outline of the bottom plate top 321 on the first surface. A step surface is formed between the bottom plate top 321 and the bottom plate bottom 322, and the step surface is embedded in the lower plastic 20.

[0056] The stepped surface can be embedded in the lower plastic 20 to increase the connection strength between the pole bottom plate 32 and the lower plastic 20. In addition, the lower plastic 20 forms a rim below the stepped surface. The rim can improve the problems of battery self-discharge, internal short circuit, etc. caused by the metal wire at the edge of the conductive component 30.

[0057] In a preferred embodiment, Figure 10 As shown, the width W of the step surface, that is, the width of the edge formed by the lower plastic 20 below the step surface satisfies: 0.5mm≤W≤5mm, so as to ensure the width and area of ​​the step surface and the connection strength between the pole bottom plate 32 and the lower plastic 20.

[0058] In a preferred embodiment, Figures 1-9 As shown, the column includes a middle section 312 and a threaded section 313 that are connected to each other and form a step. The diameter of the middle section 312 is larger than the diameter of the threaded section 313. The middle section 312 is inserted into the first through hole and the second through hole.

[0059] The threaded section 313 is arranged below the middle section 312, and a third through hole 323 is provided on the pole base plate 32. The external thread of the threaded section 313 is connected to the internal thread in the third through hole 323. The lower end surface of the threaded section 313 is higher than the lower surface of the pole base plate 32. The height difference H1 between the lower end surface of the threaded section 313 and the lower surface of the pole base plate 32 satisfies: H1 ≥ 0.2 mm.

[0060] In this embodiment, the pole bottom plate 32 is connected to the column by threads below the cover plate assembly, which will not affect the welding of the upper end surface of the pole top plate 311 and the busbar; and the height difference H1 prevents the thread section 313 from protruding from the surface of the pole bottom plate 32, so as to avoid affecting the welding of the lower end surface of the pole bottom plate 32 and the connecting plate and the pole ear.

[0061] like Figure 12-Figure 19 The second embodiment of the present application is shown. This embodiment differs from the first embodiment in that the column includes a middle section 312 and a threaded section 313 that are connected to each other and form a step. The diameter of the middle section 312 is larger than the diameter of the threaded section 313. The middle section 312 is inserted into the first through hole and the second through hole.

[0062] The threaded segment 313 is arranged above the middle segment 312, and a fourth through hole 3111 is provided on the pole top plate 311. The external thread of the threaded segment 313 is connected to the internal thread in the fourth through hole 3111. The upper end surface of the threaded segment 313 is lower than the upper surface of the pole top plate 311. The height difference H2 between the upper end surface of the threaded segment 313 and the upper surface of the pole top plate 311 satisfies: H2 ≥ 0.2 mm.

[0063] In this embodiment, the pole top plate 311 is connected to the column above the cover plate assembly by threads, which can reduce the generation of metal wires inside the battery; and the height difference H2 can prevent the thread segment 313 from protruding from the surface of the pole top plate 311, so as to avoid affecting the welding of the upper end surface of the pole top plate 311 and the busbar.

[0064] In a preferred embodiment, Figure 9 and Figure 19 As shown, the relationship between the axial length H3 of the threaded segment 313 and the axial length H4 of the external thread satisfies the following: 1 mm ≤ H4 ≤ H3. That is, the axial length of the external thread is greater than 1 mm and less than or equal to the axial length of the threaded segment 313 to ensure sufficient threaded connection strength between the column and the pole top plate 311 or pole bottom plate 32.

[0065] In a preferred embodiment, Figure 10 As shown, the axial length of the third through hole 323 is H5, the axial length of the internal thread of the third through hole 323 is H6, and the axial length H6 of the internal thread satisfies: 1mm≤H6≤H5, or, as Figure 17 As shown, the axial length of the fourth through hole 3111 is H7, and the axial length of the internal thread of the fourth through hole 3111 is H8. The axial length H8 of the internal thread satisfies the following: 1mm≤H8≤H7. In other words, the axial length of the internal thread on the inner side wall of the third through hole 323 or the fourth through hole 3111 is greater than 1mm and less than or equal to the axial length of the third through hole 323 or the fourth through hole 3111, thereby ensuring sufficient threaded connection strength between the column and the pole top plate 311 or the pole bottom plate 32.

[0066] In a preferred embodiment, Figure 11 and Figure 19 As shown, the lower surface of the pole bottom plate 32 protrudes from the lower surface of the lower plastic 20 to facilitate welding of the pole bottom plate 32 with the connecting piece and the pole ear. The height difference H9 between the lower surface of the pole bottom plate 32 and the lower surface of the lower plastic 20 satisfies: 0.1mm≤H9≤1mm. While ensuring the convenience of welding, it can prevent the pole bottom plate 32 from extending too far into the battery case, occupying too much space in the battery case, and affecting the arrangement of other components.

[0067] In a preferred embodiment, Figure 1 、 Figure 3 and Figure 13 As shown, the device also includes a sealing ring 50, which is positioned between the base plate 10 and the lower plastic 20 and sleeved onto the column. The lower plastic 20 is also provided with a positioning groove (i.e., a groove formed by the second through hole and the upper end surface of the pole bottom plate 32). The lower end surface of the sealing ring 50 can abut the top surface of the pole bottom plate and be retained in the positioning groove. The sealing ring 50 ensures airtightness between the conductive component 30 and the cover assembly. Furthermore, an upper plastic 40 is provided between the pole top plate 311 and the base plate 10 for insulation.

[0068] In a preferred embodiment, Figure 1 As shown, a vent groove 21 extending to the edge of the lower plastic 20 is provided radially in the positioning groove. If the sealing ring 50 is not installed during assembly, gas can leak out through the vent groove 21 and be detected. Therefore, the vent groove 21 can prevent the sealing ring 50 from being missed during assembly.

[0069] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0070] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the word "or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0071] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed or recombined, and such decomposition or recombination should be regarded as equivalent solutions of the present application.

[0072] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0073] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0074] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery cover, characterized in that: include: The cover assembly includes a substrate and a lower plastic member disposed above and below, wherein the surface of the substrate away from the lower plastic member is a first surface, and the surface of the lower plastic member away from the substrate member is a second surface, the substrate is provided with a first through hole, and the lower plastic member is provided with a second through hole; A conductive component, comprising a pole top plate, a column, and a pole bottom plate, wherein the pole top plate is arranged on one side of the first surface, the column is passed through the first through hole and the second through hole, and the pole bottom plate is arranged on one side of the second surface; One end of the column is integrally connected to the pole top plate, and the other end of the column is threadedly connected to the pole bottom plate; Alternatively, one end of the column is threadedly connected to the pole top plate, and the other end of the column is integrally connected to the pole bottom plate; The pole bottom plate and the lower plastic are integrally injection-molded.

2. The battery cover according to claim 1, characterized in that: The pole bottom plate includes a bottom plate top and a bottom plate bottom. The projected area of ​​the bottom plate top on the first surface is larger than the projected area of ​​the bottom plate bottom on the first surface. Moreover, the projection of the bottom plate bottom on the first surface falls within the projection outline of the bottom plate top on the first surface. A step surface is formed between the bottom plate top and the bottom plate bottom, and the step surface is embedded in the lower plastic.

3. The battery cover according to claim 2, characterized in that: The width W of the step surface satisfies: 0.5 mm ≤ W ≤ 5 mm.

4. The battery cover according to claim 1, characterized in that: The column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole; The threaded section is arranged below the middle section, a third through hole is provided on the pole bottom plate, the external thread of the threaded section is connected to the internal thread in the third through hole, the lower end surface of the threaded section is higher than the lower surface of the pole bottom plate, and the height difference H1 between the lower end surface of the threaded section and the lower surface of the pole bottom plate satisfies: H1 ≥ 0.2 mm.

5. The battery cover according to claim 1, characterized in that: The column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole; The threaded segment is arranged above the middle segment, a fourth through hole is provided on the pole top plate, the external thread of the threaded segment is connected to the internal thread in the fourth through hole, the upper end surface of the threaded segment is lower than the upper surface of the pole top plate, and the height difference H2 between the upper end surface of the threaded segment and the upper surface of the pole top plate satisfies: H2 ≥ 0.2 mm.

6. The battery cover according to any one of claims 4 or 5, characterized in that: The relationship between the axial length H3 of the thread segment and the axial length H4 of the external thread satisfies: 1 mm ≤ H4 ≤ H3.

7. The battery cover according to claim 1, characterized in that: The column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole; The threaded section is provided below the middle section, a third through hole is provided on the pole bottom plate, the external thread of the threaded section is connected to the internal thread in the third through hole, the axial length of the third through hole is H5, the axial length of the internal thread of the third through hole is H6, and the axial length H6 of the internal thread satisfies: 1mm≤H6≤H5, or, The column includes a middle section and a threaded section that are connected to each other and form a step, the diameter of the middle section is larger than the diameter of the threaded section, and the middle section is inserted into the first through hole and the second through hole; The threaded section is arranged above the middle section, and a fourth through hole is provided on the pole top plate. The external thread of the threaded section is connected to the internal thread in the fourth through hole. The axial length of the fourth through hole is H7, and the axial length of the internal thread of the fourth through hole is H8. The axial length H8 of the internal thread satisfies: 1mm≤H8≤H7.

8. The battery cover according to any one of claims 1 to 5, characterized in that: The lower surface of the pole bottom plate protrudes from the lower surface of the lower plastic, and a height difference H9 between the lower surface of the pole bottom plate and the lower surface of the lower plastic satisfies: 0.1 mm≤H9≤1 mm.

9. The battery cover according to any one of claims 1 to 5, characterized in that: It also includes a sealing ring, which is arranged between the base plate and the lower plastic and sleeved on the column; a positioning groove is also provided on the lower plastic, and the lower end surface of the sealing ring can abut against the top surface of the column bottom plate and be clamped in the positioning groove.

10. The battery cover according to claim 9, characterized in that: A vent groove extending to the edge of the lower plastic is provided radially of the positioning groove.

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