Pole component, top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a pole component, a top cover assembly and a battery. The pole assembly penetrates through a pole through hole in a top cover body of the top cover assembly and comprises a pole body, a pole clamping piece and a pole annular table. The pole body is provided with a bearing part, the pole clamping piece is connected to the pole body, and the pole clamping piece and the bearing part are arranged at an interval. The pole ring table is located on one side of the top cover body, annularly arranged on the pole body and clamped between the pole clamping part and the bearing part, the pole ring table extends out of the range of the pole through hole in the radial direction and is connected to a first plastic part, and the first plastic part is arranged on one side of the top cover body in the circumferential direction of the pole through hole. The pole assembly can prevent cracking, improve the stability and reliability, and is beneficial to simplifying the structure and improving the assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a terminal assembly, a top cover assembly, and a battery. Background Technology

[0002] Because copper has better electrical conductivity than aluminum, and aluminum is relatively cheaper, existing power batteries use a copper-aluminum composite for the negative electrode to balance conductivity and manufacturing cost.

[0003] In the fabrication of the aforementioned composite negative electrode post, the copper and aluminum parts are typically assembled using friction welding. However, composite negative electrode posts assembled using friction welding still have a significant risk of cracking at the interface between the copper and aluminum parts. Furthermore, friction welding is a costly, complex, and inefficient assembly method.

[0004] Therefore, there is an urgent need for a terminal block assembly, a top cover assembly, and a battery to solve the above problems. Utility Model Content

[0005] According to one aspect of the present invention, the objective is to provide a pole assembly that can prevent cracking, improve stability and reliability, and facilitate simplification of structure and improvement of assembly efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The electrode post assembly has a through-hole in the top cover body of the top cover assembly, the electrode post assembly comprising:

[0008] The electrode post body and the electrode post connector are provided. The electrode post body is provided with a support part. The electrode post connector is connected to the electrode post body and is spaced apart from the support part.

[0009] The pole post ring platform is located on one side of the top cover body, is arranged around the pole post body, and is sandwiched between the pole post snap-fit ​​and the support part. The pole post ring platform extends radially out of the pole post through hole range and is connected to the first plastic part. The first plastic part is arranged on one side of the top cover body along the circumference of the pole post through hole.

[0010] As a preferred embodiment of the pole assembly provided by this utility model, the pole ring includes a mounting portion and a connecting portion. The connecting portion protrudes from the side of the mounting portion away from the support portion and is configured to connect an electrical connector. A first groove is formed between the end face of the mounting portion away from the support portion and the end face of the connecting portion facing the pole body. The pole connector is embedded in the first groove.

[0011] As a preferred embodiment of the pole assembly provided by this utility model, a second groove is provided on the inner side of the pole snap-fit ​​member, and the pole body is also provided with a riveting part, the riveting part protruding from the bearing part, the pole ring is arranged around the periphery of the riveting part, and the top end of the riveting part is provided with a flange structure facing away from the axis, the flange structure being embedded in the second groove.

[0012] As a preferred embodiment of the pole assembly provided by this utility model, the pole body is further provided with a snap-fit ​​portion, the snap-fit ​​portion is fixedly connected to and disposed on the side of the bearing portion away from the riveting portion, the bearing portion penetrates the top cover body, the snap-fit ​​portion is connected to the second plastic part of the top cover assembly and snap-fitted to the top cover body; the second plastic part and the first plastic part are respectively disposed on opposite sides of the top cover body.

[0013] As a preferred embodiment of the pole assembly provided by this utility model, the diameter of the snap-fit ​​part is larger than the diameter of the support part, a third groove is formed between the snap-fit ​​part and the support part, a sealing element can be provided in the third groove, and the sealing element abuts against the inner wall of the pole through hole.

[0014] As a preferred embodiment of the pole assembly provided by this utility model, the bearing part, the riveting part, and the snap-fit ​​part are integrally formed.

[0015] According to another aspect of the present invention, the object is to provide a top cover assembly, the top cover assembly including a top cover body, a first plastic part and a second plastic part, and further including a pole post assembly as described in any of the above embodiments, wherein the first plastic part and the second plastic part are respectively disposed on opposite sides of the top cover body, the pole post body is connected to the second plastic part and passes through the top cover body and the first plastic part, and the pole post annulus is connected to the first plastic part.

[0016] As a preferred embodiment of the top cover assembly provided by this utility model, the first plastic part has an installation groove, and the pole post ring extends out of the range of the pole post through hole and is embedded and fixed in the installation groove.

[0017] As a preferred embodiment of the top cover assembly provided by this utility model, the first plastic part includes a horizontal part and a vertical part that are fixed together. The mounting groove is formed between the end face of the horizontal part away from the top cover body and the end face of the vertical part facing the pole body. The end face of the horizontal part away from the top cover body is flush with the bearing surface of the bearing part.

[0018] According to another aspect of the present invention, the object is to provide a battery comprising a top cover assembly as described above.

[0019] The beneficial effects of this utility model are:

[0020] The electrode post assembly provided by this utility model penetrates through a electrode post through hole in the top cover body of the top cover assembly. The electrode post assembly includes an electrode post body, an electrode post snap-fit ​​component, and an electrode post ring platform. The electrode post body has a support portion, and the electrode post snap-fit ​​component is connected to the electrode post body and spaced apart from the support portion. The electrode post ring platform is located on one side of the top cover body, encircling the electrode post body and sandwiched between the electrode post snap-fit ​​component and the support portion. The support portion supports the electrode post ring platform, and the electrode post snap-fit ​​component presses against the electrode post ring platform to achieve a snap-fit ​​connection between the electrode post ring platform and the electrode post body. No welding connection is required between the two, effectively preventing the risk of cracking. The electrode post ring platform extends radially beyond the electrode post through hole and connects to a first plastic part, which is circumferentially disposed on one side of the top cover body along the electrode post through hole. Through the above arrangement, a reliable connection between the electrode post body and the first plastic part can be achieved through the electrode post ring platform, simplifying the structure and improving assembly efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0022] Figure 1 This is an exploded view of the top cover assembly provided in this embodiment of the utility model;

[0023] Figure 2 This is a top view of the top cover assembly provided in this embodiment of the utility model;

[0024] Figure 3 yes Figure 2 Sectional view along the middle AA direction;

[0025] Figure 4 yes Figure 3 A magnified view of a section marked B in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of the pole ring provided in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the first plastic part provided in this embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the pole post connector and the pole post body provided in the embodiment of this utility model.

[0029] In the picture:

[0030] 10. First plastic part; 11. Mounting groove; 12. Horizontal part; 13. Vertical part; 20. Top cover body; 30. Second plastic part; 40. Sealing element;

[0031] 100. Pole post body; 110. Supporting part; 120. Riveting part; 121. Flanged structure; 130. Snap-fit ​​part; 140. Third groove;

[0032] 200, pole post ring; 210, mounting part; 220, connecting part; 230, first groove;

[0033] 300, pole post connector; 310, second groove. Detailed Implementation

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0042] This embodiment provides an electrode assembly, a top cover assembly, and a battery. The battery includes a housing (not shown), a battery cell (not shown), and the top cover assembly provided in this embodiment. The battery cell is disposed within the housing, and the top cover assembly covers the opening of the housing to seal the battery cell within the housing.

[0043] Figure 1 This diagram shows an exploded view of the top cover assembly provided in an embodiment of the present invention. Figure 2This is a top view of the top cover assembly provided in an embodiment of the present invention. (Refer to...) Figure 1 and Figure 2 The top cover assembly provided in this embodiment includes a top cover body 20, a first plastic part 10 and a second plastic part 30, and also includes the pole post assembly provided in this embodiment.

[0044] The top cover body 20 has a through hole for the electrode post. The first plastic part 10 and the second plastic part 30 are respectively disposed on opposite sides of the top cover body 20. The first plastic part 10 is specifically fixedly disposed on the side of the top cover body 20 away from the housing and is arranged circumferentially along the through hole for the electrode post. The second plastic part 30 is specifically fixedly disposed on the side of the top cover body 20 facing the housing. The electrode post assembly is connected to the second plastic part 30 and can pass through the through hole for the electrode post and the first plastic part 10, while also being connected to the first plastic part 10. The electrode post assembly can be connected to an external electrical device to supply power to it.

[0045] Specifically, the top cover body 20 has multiple protruding structures on the side opposite to the housing, and the first plastic part 10 has multiple insertion grooves corresponding to the protruding structures, allowing the protruding structures to be inserted into the insertion grooves. This arrangement enables the first plastic part 10 to be mounted on the top cover body 20 and positions it, preventing relative rotation between the first plastic part 10 and the top cover body 20.

[0046] Reference Figure 1 , Figure 3 and Figure 4 The electrode assembly includes an electrode body 100, an electrode ring 200, and an electrode connector 300. The electrode body 100 is made of a different material than the electrode ring 200, while the electrode connector 300 is made of the same material as the electrode body 100. In this embodiment, both the electrode body 100 and the electrode connector 300 are made of copper, and the electrode ring 200 is made of aluminum.

[0047] Specifically, the pole body 100 is provided with a support portion 110, and the pole snap-fit ​​member 300 is connected to the pole body 100 and is spaced apart from the support portion 110 along the axial direction of the pole body 100. The pole ring platform 200 is located on the side of the top cover body 20 away from the shell, is arranged around the periphery of the pole body 100, and is sandwiched between the pole snap-fit ​​member 300 and the support portion 110. The support portion 110 can support the pole ring platform 200, and the pole snap-fit ​​member 300 can press against the pole ring platform 200 to achieve the snap-fit ​​between the pole ring platform 200 and the pole body 100. There is no need for friction welding between the two, which effectively prevents the risk of cracking between them.

[0048] Furthermore, the pole post ring 200 extends radially beyond the pole post through hole and is connected to the first plastic part 10. The connection between the pole post ring 200 and the first plastic part 10 enables reliable assembly of the pole post assembly and the top cover body 20.

[0049] Figure 5 This diagram shows a schematic representation of the structure of the pole ring provided in an embodiment of the present invention. (Refer to...) Figure 4 and Figure 5 The electrode ring 200 includes a coaxially integrally formed mounting portion 210 and a connecting portion 220. The connecting portion 220 protrudes from the side of the mounting portion 210 opposite to the support portion 110 and is configured to connect an electrical connector. A first groove 230 is formed between the end face of the mounting portion 210 opposite to the support portion 110 and the end face of the connecting portion 220 facing the electrode body 100, and the electrode snap-fit ​​300 can be embedded in the first groove 230. In this embodiment, the electrical connector can specifically be an aluminum bar, so as to realize the connection with external devices through the aluminum bar.

[0050] Figure 6 This diagram shows a structural schematic of the first plastic part provided in an embodiment of the present invention, with reference to... Figure 4 and Figure 6 The first plastic part 10 has an installation groove 11, and the pole post ring 200 extends out of the pole post through hole and is embedded and fixed in the installation groove 11.

[0051] Specifically, the first plastic part 10 includes a horizontal portion 12 and a vertical portion 13 integrally formed on the same axis. The mounting groove 11 is formed between the end face of the horizontal portion 12 away from the top cover body 20 and the end face of the vertical portion 13 facing the pole body 100. The end face of the horizontal portion 12 away from the top cover body 20 is flush with the bearing surface of the bearing portion 110 to ensure the flatness of the upper end face of the pole assembly and avoid the partial structure of the pole assembly from protruding, which would increase the risk of damage.

[0052] To be more specific, refer to Figure 6 The mounting groove 11 has multiple snap-fit ​​surfaces spaced circumferentially on the inner side of the vertical part 13. These snap-fit ​​surfaces are flat, while the areas without snap-fit ​​surfaces are arc-shaped circumferential surfaces. These snap-fit ​​surfaces can limit the outer periphery of the connecting part 220, preventing relative rotation between the connecting part 220 and the first plastic part 10.

[0053] Figure 7 This diagram illustrates the structure of the electrode post connector and electrode post body provided in an embodiment of the present invention. (Refer to...) Figure 4 and Figure 7The pole post connector 300 has a second groove 310 on its inner side, and the pole post body 100 also has a riveting part 120. The riveting part 120 protrudes from the upper end face of the supporting part 110, and the pole post annulus 200 is arranged around the periphery of the riveting part 120. The top end of the riveting part 120 has a flange structure 121 facing away from the axis, and the flange structure 121 can be embedded in the second groove 310. The flange structure 121 can achieve basic positioning and fixation of the pole post connector 300 and the top end of the riveting part 120. With the help of laser welding, the top end of the riveting part 120 and the pole post connector 300 can be further fixedly connected to ensure the stability and reliability of the connection between the two.

[0054] Specifically, the pole post connector 300 has a ring-shaped structure. Through the above-mentioned arrangement, the pole post connector 300 can ensure the pressing effect on the upper end face of the mounting part 210, and ensure the assembly reliability between the pole post connector 300 and the pole post ring platform 200.

[0055] More specifically, the pole body 100 is also provided with a snap-fit ​​portion 130, which is fixedly connected to and disposed on the side of the support portion 110 away from the riveting portion 120. The support portion 110 penetrates the top cover body 20, and the snap-fit ​​portion 130 is connected to the second plastic part 30 of the top cover assembly and snaps onto the top cover body 20.

[0056] Preferably, the riveting part 120, the supporting part 110, and the snap-fit ​​part 130 are integrally formed. This arrangement helps to improve the connection strength of the riveting part 120, the supporting part 110, and the snap-fit ​​part 130, thereby ensuring the overall structural reliability of the pole body 100.

[0057] More specifically, the diameter of the snap-fit ​​portion 130 is larger than the diameter of the support portion 110. A third groove 140 is formed between the snap-fit ​​portion 130 and the support portion 110. A sealing element 40 can be disposed in the third groove 140, and the sealing element 40 abuts against the inner wall of the pole post through hole. The sealing element 40 is specifically annular in structure, sandwiched between the pole post body 100 and the top cover body 20. The axial cross-section of the sealing element 40 is L-shaped, including an integrally formed first sealing portion and a second sealing portion. The first sealing portion is sandwiched between the inner wall of the pole post through hole and the peripheral side of the support portion 110. The upper end face of the first sealing portion extends out of the pole post through hole and abuts against the lower end face of the first plastic part 10. The second sealing portion extends away from the support portion 110 to form a seal on the upper end face of the snap-fit ​​portion 130 and the side of the top cover body 20 facing the housing. The sealing performance of the top cover assembly can be guaranteed by the sealing element 40. In this embodiment, the seal 40 can be made of rubber or silicone.

[0058] Preferably, in this embodiment, the thickness of the snap-fit ​​portion 130 is not less than 1.3mm. With the above setting, deformation of the snap-fit ​​portion 130 can be effectively prevented, so as to further improve the support effect of the snap-fit ​​portion 130.

[0059] It should be noted that the distance between the upper end face of the connecting part 220 and the lower end face of the mounting part 210 is not less than 2mm, which can effectively prevent the edge of the pole ring platform 200 from lifting when the pole assembly is riveted. Furthermore, the thickness of the portion of the top cover body 20 located directly below the first plastic part 10 is not less than 1.2mm, which can effectively prevent the top cover body 20 from deforming when the pole assembly is riveted.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pole assembly, characterized in that, A through-hole in the top cover body (20) of the top cover assembly, the pole assembly comprising: The pole body (100) and the pole connector (300) are provided with a support part (110) and the pole connector (300) is connected to the pole body (100) and is spaced apart from the support part (110). The pole post ring platform (200) is located on one side of the top cover body (20), is arranged around the pole post body (100), and is sandwiched between the pole post snap-fit ​​member (300) and the support part (110). The pole post ring platform (200) extends radially out of the pole post through hole range and is connected to the first plastic part (10). The first plastic part (10) is arranged on one side of the top cover body (20) along the circumference of the pole post through hole.

2. The pole assembly according to claim 1, characterized in that, The pole ring platform (200) includes a mounting portion (210) and a connecting portion (220). The connecting portion (220) protrudes from the side of the mounting portion (210) away from the support portion (110) and is configured to connect an electrical connector. A first groove (230) is formed between the end face of the mounting portion (210) away from the support portion (110) and the end face of the connecting portion (220) facing the pole body (100). The pole snap-fit ​​member (300) is embedded in the first groove (230).

3. The pole assembly according to claim 1, characterized in that, The inner side of the pole clip (300) is provided with a second groove (310), and the pole body (100) is also provided with a riveting part (120). The riveting part (120) protrudes from the bearing part (110). The pole ring platform (200) is arranged around the periphery of the riveting part (120). The top end of the riveting part (120) is provided with a flange structure (121) facing away from the axis. The flange structure (121) is embedded in the second groove (310).

4. The pole assembly according to claim 3, characterized in that, The pole body (100) is also provided with a snap-fit ​​part (130), which is fixedly connected to and disposed on the side of the support part (110) away from the riveting part (120). The support part (110) penetrates the top cover body (20). The snap-fit ​​part (130) is connected to the second plastic part (30) of the top cover assembly and snaps onto the top cover body (20). The second plastic part (30) and the first plastic part (10) are respectively disposed on opposite sides of the top cover body (20).

5. The pole assembly according to claim 4, characterized in that, The diameter of the snap-fit ​​portion (130) is larger than the diameter of the support portion (110). A third groove (140) is formed between the snap-fit ​​portion (130) and the support portion (110). A sealing element (40) can be provided in the third groove (140), and the sealing element (40) abuts against the inner wall of the pole post through hole.

6. The pole assembly according to claim 4, characterized in that, The supporting part (110), the riveting part (120) and the snap-fit ​​part (130) are integrally formed.

7. The top cover assembly, characterized in that, The assembly includes a top cover body (20), a first plastic part (10) and a second plastic part (30), and also includes a pole assembly as described in any one of claims 1-6, wherein the first plastic part (10) and the second plastic part (30) are respectively disposed on opposite sides of the top cover body (20), the pole body (100) is connected to the second plastic part (30) and passes through the top cover body (20) and the first plastic part (10), and the pole ring platform (200) is connected to the first plastic part (10).

8. The top cover assembly according to claim 7, characterized in that, The first plastic part (10) has an installation groove (11), and the pole ring platform (200) extends out of the range of the pole through hole and is embedded and fixed in the installation groove (11).

9. The top cover assembly according to claim 8, characterized in that, The first plastic part (10) includes a horizontal part (12) and a vertical part (13) fixed together. The mounting groove (11) is formed between the end face of the horizontal part (12) away from the top cover body (20) and the end face of the vertical part (13) facing the pole body (100). The end face of the horizontal part (12) away from the top cover body (20) is flush with the bearing surface of the bearing part (110).

10. A battery, characterized in that, Includes the top cover assembly as described in any one of claims 7-9.

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