Top cover assembly and single battery

Abstract

The utility model discloses a top cover assembly and a single battery. The top cover assembly comprises a cover plate, lower plastic and a pole structure, the cover plate is provided with a pole hole; the lower plastic is arranged on one side of the cover plate, and an avoiding hole communicated with the pole hole is formed in the lower plastic; one end of the pole structure sequentially penetrates through the avoiding hole and the pole hole, and the other end of the pole structure abuts against the side, away from the cover plate, of the lower plastic and is used for being electrically connected with the pole lug, so that the pole structure is directly and electrically connected with the pole lug, electrical connection between an adapter plate and the pole lug is avoided, the number of parts is reduced, the structure of the top cover assembly is simplified, and the cost is reduced. And the weight of the top cover assembly is reduced.

Description

Technical Field

[0001] This invention relates to the field of single-cell battery technology, and more particularly to a top cover assembly and a single-cell battery. Background Technology

[0002] With the development of technology, single-cell batteries are widely used in various fields, such as portable devices, electric vehicles, and aerospace technology. Single-cell batteries are used to transfer ions and maintain electrical neutrality in order to realize the conversion and transmission of electrical energy. The top cover assembly is part of the single-cell battery.

[0003] In the prior art, the existing top cover assembly includes a cover plate, a pole, and an adapter plate. The pole passes through the cover plate, and the adapter plate is connected to the pole so that the tab can be electrically connected to the pole through the adapter plate. Therefore, multiple parts are required, which increases the overall weight of the top cover assembly. Summary of the Invention

[0004] One object of the present invention is to provide a top cover assembly and module that aims to solve the technical problem that the electrode tabs are electrically connected to the electrode posts through adapter plates, thus requiring multiple parts and increasing the overall weight of the top cover assembly.

[0005] To achieve the above objectives, the present invention provides a solution: a top cover assembly, comprising:

[0006] The cover plate has pole holes;

[0007] A lower plastic insert is disposed on one side of the cover plate, and the lower plastic insert has a clearance hole communicating with the pole hole; and

[0008] The pole structure has one end through which the clearance hole and the pole hole are sequentially passed, and the other end of the pole structure abuts against the side of the lower plastic away from the cover plate and is used for electrical connection with the electrode tab.

[0009] Optionally, the pole structure includes a connector, one end of which passes through the clearance hole and the pole hole in sequence, and the other end of which abuts against the side of the lower plastic away from the cover plate and is used for electrical connection with the tab.

[0010] Optionally, the connector includes a pole portion and a conductive portion, the pole portion and the conductive portion being an integral structure, the pole portion being provided with the clearance hole and the pole hole in sequence, and the conductive portion abutting against the side of the lower plastic away from the cover plate and being used for electrical connection with the tab.

[0011] Optionally, a clearance groove is provided at the end of the pole portion that connects to the conductive portion.

[0012] Optionally, the pole structure further includes a terminal, which is connected to one end of the connector that passes through the pole hole, and the terminal is used for conducting electricity.

[0013] Optionally, the lower plastic part has a first limiting groove, and the connector is assembled in the first limiting groove.

[0014] Optionally, in the direction from the lower plastic to the cover plate, the sidewall of the first limiting groove gradually expands outward, and the connector engages with the first limiting groove.

[0015] Optionally, the cover plate has a second limiting groove, and the lower plastic is assembled in the second limiting groove.

[0016] Optionally, in the direction from the lower plastic to the cover plate, the sidewall of the second limiting groove gradually expands outward, and the lower plastic and the second limiting groove are engaged.

[0017] To achieve the above objectives, the present invention provides a solution as follows: a single battery cell, the single battery cell comprising: a cell and the top cover assembly, the cell comprising an electrode assembly and a tab, the tab and the electrode assembly being electrically connected, and the terminal post structure and the tab being electrically connected.

[0018] The beneficial effects of this invention are as follows:

[0019] This utility model provides a top cover assembly and a single battery cell. The cover plate has a terminal hole. A lower plastic is disposed on one side of the cover plate and has a clearance hole communicating with the terminal hole. One end of the terminal structure passes through the clearance hole and the terminal hole in sequence, and the other end of the terminal structure abuts against the side of the lower plastic away from the cover plate and is used for electrical connection with the tab. This allows the terminal structure to be directly electrically connected to the tab, avoiding the use of an adapter plate for electrical connection with the tab, reducing the number of parts, simplifying the structure of the top cover assembly, and reducing the weight of the top cover assembly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic cross-sectional view of the top cover assembly provided in the first embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional structural diagram of the top cover assembly provided in the second embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional structural diagram of the top cover assembly provided in the third embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional structural diagram of the top cover assembly provided in the fourth embodiment of the present invention.

[0025] Explanation of icon numbers:

[0026] 100. Top cover assembly;

[0027] 10. Cover plate; 10a. Pole post hole; 10b. Second limiting groove;

[0028] 20. Lower plastic part; 20a. Clearance hole; 20b. First limiting groove;

[0029] 30. Pole post structure; 31. Connector; 31a. Clearance groove; 311. Pole post portion; 312. Conductive portion; 32. Terminal;

[0030] 40. Apply plastic. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 4 As shown, Figure 1 This is a cross-sectional structural diagram of the top cover assembly provided in the first embodiment of the present invention. Figure 2 This is a cross-sectional structural diagram of the top cover assembly provided in the second embodiment of the present invention. Figure 3 This is a cross-sectional structural diagram of the top cover assembly provided in the third embodiment of the present invention. Figure 4 This is a cross-sectional structural diagram of the top cover assembly provided in the fourth embodiment of the present invention.

[0033] Please refer to the attached document. Figures 1-4 This application provides a top cover assembly 100 for covering the top of a battery cell and electrically connecting it to the tabs of the battery cell. The top cover assembly 100 is part of a single battery cell and is not limited here.

[0034] Please refer to the attached document. Figure 1In this embodiment, the top cover assembly 100 includes a cover plate 10, a lower plastic 20, and an electrode post structure 30. The cover plate 10 has an electrode post hole 10a. The lower plastic 20 is disposed on one side of the cover plate 10 and has a clearance hole 20a communicating with the electrode post hole 10a. One end of the electrode post structure 30 passes through the clearance hole 20a and the electrode post hole 10a in sequence, and the other end of the electrode post structure 30 abuts against the side of the lower plastic 20 away from the cover plate 10 and is used for electrical connection with the electrode tab. This allows the electrode post structure 30 to be directly electrically connected to the electrode tab, avoiding the use of an adapter plate for electrical connection with the electrode tab, reducing the number of parts, simplifying the structure of the top cover assembly 100, and reducing the weight of the top cover assembly 100.

[0035] Please refer to the attached document. Figure 1 In this embodiment of the application, the cover plate 10 is provided with a pole hole 10a, which is used for the pole structure 30 to pass through, so that part of the pole structure 30 is exposed on the upper side of the cover plate 10, thereby facilitating the electrical connection between external electrical devices and the pole structure 30.

[0036] Please refer to the attached document. Figure 1 In this embodiment of the application, the lower plastic 20 is disposed on the lower side of the cover plate 10. The lower plastic 20 has a clearance hole 20a that communicates with the pole hole 10a. The clearance hole 20a is used for the pole structure 30 to pass through, thereby facilitating the passage of part of the pole structure 30 through the clearance hole 20a and the pole hole 10a to the external environment.

[0037] Please refer to the attached document. Figure 1 In this embodiment, one end of the pole post structure 30 is sequentially provided with a clearance hole 20a and a pole post hole 10a, and the other end of the pole post structure 30 abuts against the side of the lower plastic 20 away from the cover plate 10. This allows the cover plate 10 and the other end of the pole post structure 30 to clamp the lower plastic 20, thereby facilitating the contact of the two surfaces of the lower plastic 20 with the cover plate 10 and the other end of the pole post structure 30 respectively. This also facilitates insulation between the cover plate 10 and the other end of the pole post structure 30 through the lower plastic 20, preventing energization between the cover plate 10 and the pole post structure 30. The pole post structure 30 is used for electrical connection with the tab, allowing direct electrical connection between the pole post structure 30 and the tab, avoiding the use of an adapter plate for electrical connection with the tab, reducing the number of parts, simplifying the structure of the top cover assembly 100, and reducing the weight of the top cover assembly 100. At the same time, the pole post structure 30 has both pole post and adapter plate functions, improving the performance of the pole post structure 30.

[0038] Please refer to the attached document. Figure 1At this point, the pole structure 30 includes a connector 31. One end of the connector 31 has a clearance hole 20a and a pole hole 10a passing through it sequentially. The other end of the connector 31 abuts against the side of the lower plastic 20 away from the cover plate 10, so that the cover plate 10 and the other end of the connector 31 can clamp the lower plastic 20. This allows the two surfaces of the lower plastic 20 to contact the cover plate 10 and the other end of the connector 31 respectively, thus facilitating insulation between the cover plate 10 and the other end of the connector 31 through the lower plastic 20, preventing energization between the cover plate 10 and the connector 31, and thus facilitating insulation between the pole structure 30 and the cover plate 10 through the connector 31. The connector 31 is used for electrical connection with the tab, allowing the connector 31 to be directly electrically connected to the tab, thereby facilitating direct conductivity between the pole structure 30 and the tab through the connector 31. Simultaneously, the connector 31 functions as both a pole and an adapter, improving its performance.

[0039] Please refer to the attached document. Figure 1 The connector 31 includes a terminal portion 311 and a conductive portion 312, which are integrally formed. This ensures the connection strength between the terminal portion 311 and the conductive portion 312, improves the connection stability between them, and prevents them from separating. The terminal portion 311 is sequentially provided with a clearance hole 20a and a terminal hole 10a, allowing the top end of the terminal portion 311 to be exposed to the external environment. This facilitates electrical conduction between the terminal portion 311 and external electrical components, and also allows the connector 31 to sequentially pass through the clearance hole 20a and the terminal hole 10a via the terminal portion 311.

[0040] Please refer to the attached document. Figure 1 Furthermore, the conductive part 312 abuts against the side of the lower plastic 20 away from the cover plate 10, so that the cover plate 10 and the conductive part 312 sandwich the lower plastic 20. This allows the two surfaces of the lower plastic 20 to contact the cover plate 10 and the conductive part 312 respectively, thereby facilitating insulation between the cover plate 10 and the conductive part 312 through the lower plastic 20 and preventing energization between the cover plate 10 and the conductive part 312. This also facilitates insulation between the connector 31 and the cover plate 10 through the conductive part 312. The conductive part 312 is used for electrical connection with the tab, so that the conductive part 312 can be directly electrically connected to the tab, thereby facilitating direct conductivity between the connector 31 and the tab through the conductive part 312.

[0041] Please refer to the attached document. Figure 1 Specifically, an upper plastic 40 is provided between the electrode post 311 and the cover plate 10. The upper plastic 40 is sandwiched between the electrode post 311 and the cover plate 10 so that the two surfaces of the upper plastic 40 can contact the electrode post 311 and the cover plate 10 respectively. This allows the cover plate 10 to be insulated from the electrode post 311 through the upper plastic 40, preventing the electrode post 311 from being energized with the cover plate 10.

[0042] Please refer to the attached document. Figure 1 Furthermore, a clearance groove 31a is provided at the end where the electrode post 311 connects to the conductive part 312. The clearance groove 31a is recessed from bottom to top between the electrode post 311 and the conductive part 312, with the opening of the clearance groove 31a facing downwards. This allows the clearance groove 31a to avoid other electrical components, thereby reducing the connection thickness between the connector 31 and other electrical components and making full use of the space in the clearance groove 31a. At the same time, it saves material on the electrode post 311 and the conductive part 312.

[0043] Please refer to the attached document. Figure 2 In the second embodiment, the pole structure 30 further includes a terminal 32, which is disposed on the upper side of the connector 31. The lower end of the terminal 32 passes through a pole hole 10a, and the terminal 32 and the end of the connector 31 passing through the pole hole 10a are connected. This allows the terminal 32 to be detachably connected to the top of the connector 31, enabling the terminal 32 to be connected to or detached from the top of the connector 31, thus improving the ease of replacement of the terminal 32. The terminal 32 can be made of copper or aluminum. The terminal 32 is used for conductivity, allowing the connector 31 to conduct electricity with external electrical components via the terminal 32.

[0044] Please refer to the attached document. Figure 3 In the third embodiment, the lower plastic 20 has a first limiting groove 20b located on its lower side. The connector 31 is fitted into the first limiting groove 20b, allowing it to connect to the lower plastic 20 via the groove. The inner wall of the first limiting groove 20b restricts the position of the connector 31, improving the connection stability between the lower plastic 20 and the connector 31. The connector 31 fully utilizes the space of the first limiting groove 20b, reducing the thickness between the lower plastic 20 and the connector 31. This reduces the overall thickness of the top cover assembly 100, making it easier to make individual batteries smaller. Alternatively, more electrical components can be placed on the lower side of the top cover assembly 100, increasing energy density. Optionally, the thickness of the connector 31 is 0.6-1 mm.

[0045] Please refer to the attached document. Figure 3 At this time, in the direction from the lower plastic 20 to the cover plate 10, the side wall of the first limiting groove 20b gradually expands outward, and the connector 31 and the first limiting groove 20b are engaged, so that the connector 31 and the first limiting groove 20b can be fixed by engaging, thus ensuring the connection stability between the connector 31 and the first limiting groove 20b.

[0046] Please refer to the attached document. Figure 4In the fourth embodiment, the cover plate 10 has a second limiting groove 10b located on its lower side. The lower plastic 20 is fitted into the second limiting groove 10b, allowing it to connect with the cover plate 10 via the groove. The inner wall of the second limiting groove 10b restricts the position of the lower plastic 20, improving the connection stability between the cover plate 10 and the lower plastic 20. The lower plastic 20 fully utilizes the space of the second limiting groove 10b, reducing the thickness between the cover plate 10 and the lower plastic 20. The thickness of the cover plate 10 can be reduced by 20% to 40%, and its weight by 10% to 30%. Furthermore, the lower plastic 20 can be snapped into the second limiting groove 10b from bottom to top, or inserted into it from front to back, improving the installation methods of the lower plastic 20 relative to the cover plate 10.

[0047] Please refer to the attached document. Figure 4 At this time, in the direction from the lower plastic 20 to the cover plate 10, the side wall of the second limiting groove 10b gradually expands outward, and the lower plastic 20 and the second limiting groove 10b are engaged, so that the lower plastic 20 and the second limiting groove 10b can be fixed by engaging, thus ensuring the connection stability between the lower plastic 20 and the second limiting groove 10b.

[0048] In the fifth embodiment, a single battery cell includes a cell and a top cover assembly 100, the top cover assembly 100 covering the cell. The cell includes an electrode assembly and tabs, the tabs and the electrode assembly are electrically connected, and the terminal post structure 30 is electrically connected to the tabs, so that the electrode assembly can conduct electricity with the terminal post structure 30 through the tabs, which simplifies the structure of the single battery cell and reduces its weight.

[0049] The beneficial effects of this invention are as follows:

[0050] This application provides a top cover assembly 100 and a single battery cell. The cover plate 10 has an electrode post hole 10a. A lower plastic 20 is disposed on one side of the cover plate 10, and the lower plastic 20 has a clearance hole 20a communicating with the electrode post hole 10a. One end of the electrode post structure 30 passes through the clearance hole 20a and the electrode post hole 10a in sequence, and the other end of the electrode post structure 30 abuts against the side of the lower plastic 20 away from the cover plate 10 and is used for electrical connection with the tab. This allows the electrode post structure 30 to be directly electrically connected to the tab, avoiding the use of an adapter plate for electrical connection with the tab, reducing the number of parts, simplifying the structure of the top cover assembly 100, and reducing the weight of the top cover assembly 100.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0052] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0053] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0054] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A top cover assembly, characterized in that, include: The cover plate has pole holes; The lower plastic is disposed on one side of the cover plate, and the lower plastic has a clearance hole that communicates with the pole hole; as well as The pole structure has one end through which the clearance hole and the pole hole are sequentially passed, and the other end of the pole structure abuts against the side of the lower plastic away from the cover plate and is used for electrical connection with the electrode tab.

2. The top cover assembly according to claim 1, characterized in that, The pole structure includes a connector, one end of which is sequentially provided with the clearance hole and the pole hole, and the other end of which abuts against the side of the lower plastic away from the cover plate and is used for electrical connection with the tab.

3. The top cover assembly according to claim 2, characterized in that, The connector includes a pole portion and a conductive portion, which are integral structures. The pole portion passes through the clearance hole and the pole hole in sequence. The conductive portion abuts against the side of the lower plastic away from the cover plate and is used for electrical connection with the tab.

4. The top cover assembly according to claim 3, characterized in that, An air-proof groove is provided at the end where the pole part is connected to the conductive part.

5. The top cover assembly according to any one of claims 2 to 4, characterized in that, The pole structure also includes a terminal, which is connected to one end of the connector that passes through the pole hole, and the terminal is used for conducting electricity.

6. The top cover assembly according to any one of claims 2 to 4, characterized in that, The lower plastic part has a first limiting groove, and the connector is assembled in the first limiting groove.

7. The top cover assembly according to claim 6, characterized in that, In the direction from the lower plastic to the cover plate, the sidewall of the first limiting groove gradually expands outward, and the connector engages with the first limiting groove.

8. The top cover assembly according to any one of claims 2 to 4, characterized in that, The cover plate has a second limiting groove, and the lower plastic is assembled in the second limiting groove.

9. The top cover assembly according to claim 8, characterized in that, In the direction from the lower plastic to the cover plate, the sidewall of the second limiting groove gradually expands outward, and the lower plastic and the second limiting groove are engaged.

10. A single-cell battery, characterized in that, The single battery cell includes: a cell and a top cover assembly as described in any one of claims 1 to 9, the cell including an electrode assembly and a tab, the tab and the electrode assembly being electrically connected, and the terminal structure and the tab being electrically connected.

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