Cover plate assembly and battery

Abstract

The utility model provides a cover plate assembly and a battery, and relates to the technical field of batteries. The cover plate assembly comprises a top cover, a pole, a connecting piece and a first insulating piece. The top cover is provided with a protrusion, and the protrusion is provided with an opening penetrating through the top cover. And the pole is arranged in the open hole in a penetrating manner, and part of the pole is mounted on the bulge. And the connecting piece is electrically connected with the pole. The first insulating piece is located at the bottom of the top cover, and an avoiding groove is formed in the bottom of the first insulating piece and used for containing at least part of the connecting piece. According to the technical scheme, the internal space of the battery occupied by the pole is reduced by installing part of the pole on the bulge of the top cover, and the internal space of the battery occupied by the connecting piece is reduced by arranging the avoiding groove at the bottom of the first insulating piece and accommodating at least part of the connecting piece, so that the utilization rate of the internal space of the battery is improved; and the battery energy density is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a cover plate assembly and a battery. Background Art

[0002] With the increasing maturity of new energy vehicle technology, new energy vehicles have played a huge role in promoting social development and environmental protection, and power batteries are widely used in the field of new energy vehicles.

[0003] A battery includes an electrode assembly and a cover plate assembly. The cover plate assembly includes a connecting member and a pole column. One side of the connecting member is electrically connected to the pole column, and the other side of the connecting member is used for electrically connecting to the electrode assembly.

[0004] However, the cover plate assembly occupies part of the internal space of the battery, reducing the energy density of the battery. Summary of the Utility Model

[0005] The present application provides a cover plate assembly and a battery for reducing the internal space of the battery occupied by the cover plate assembly and improving the energy density of the battery.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] On the one hand, the present application provides a cover plate, comprising:

[0008] A top cover having a protrusion thereon, and an opening is formed through the top cover in the protrusion;

[0009] A pole column is inserted through the opening, and a part of the pole column is mounted on the protrusion;

[0010] A connecting member is electrically connected to the pole column;

[0011] A first insulating member is located at the bottom of the top cover, and an avoidance groove is formed at the bottom of the first insulating member for accommodating at least part of the connecting member.

[0012] Based on the above technical solutions, the present application can also be improved as follows.

[0013] In a possible implementation, a receiving cavity is formed at the bottom of the pole column, and part of the connecting member is located in the receiving cavity.

[0014] In a possible implementation, the connecting member includes a connecting piece and a connecting column, at least part of the connecting piece is located in the avoidance groove, and at least part of the connecting column is located in the receiving cavity.

[0015] In a possible implementation, the top of the connecting column abuts against the inner top wall of the receiving cavity.

[0016] In a possible implementation, a groove is formed at the top of the terminal post. The terminal post includes a welding portion located between the bottom of the groove and the inner top wall of the accommodation cavity. The welding portion and the connection post are penetration-welded.

[0017] In a possible implementation, the terminal post includes a first terminal post and a second terminal post. The first terminal post is mounted on the protrusion, the second terminal post abuts against the bottom of the first terminal post, and the welding portion is provided on the second terminal post.

[0018] In a possible implementation, an accommodation space is formed between the bottom of the protrusion and the bottom of the top cover. The accommodation space communicates with the opening, and the bottom of the second terminal post is located in the accommodation space.

[0019] In a possible implementation, the outer cover plate has a reinforcing portion, and a part of the first insulating member is clamped between the bottom of the top cover and the bottom of the second terminal post.

[0020] In a possible implementation, the cover plate assembly further includes a second insulating member, and a part of the second insulating member is clamped between the top of the terminal post and the protrusion.

[0021] On the other hand, the present application provides a battery, including:

[0022] A housing having an opening at the top thereof;

[0023] A cover plate assembly, which adopts the cover plate assembly in any of the above items, and the cover plate assembly is mounted at the opening and closes the opening;

[0024] An electrode assembly located inside the housing. The electrode assembly includes a tab, and the tab is electrically connected to the terminal post of the cover plate assembly.

[0025] The cover plate assembly and the battery provided by the present application have the following beneficial effects:

[0026] The cover plate assembly includes a top cover, a terminal post, a connecting member, and a first insulating member. By having a protrusion on the top cover, an opening penetrating the top cover is formed in the protrusion, and the terminal post is inserted into the opening, and a part of the terminal post is mounted on the protrusion. Compared with the terminal post being mounted at a non-protruding position of the top cover, the terminal post can be away from the housing of the battery, thereby reducing the internal space of the battery occupied by the terminal post. The first insulating member is located at the bottom of the top cover, and an avoidance groove is formed at the bottom of the first insulating member. The connecting member is electrically connected to the terminal post, and at least a part of the connecting member is located in the avoidance groove, so that the connecting member can be arranged at a position away from the housing of the battery, reducing the internal space of the battery occupied by the connecting member.

[0027] Compared with the related art, in the cover plate assembly and the battery provided by the present application, by mounting a part of the pole column on the protrusion of the top cover, the internal space of the battery occupied by the pole column is reduced, and by providing an avoidance groove at the bottom of the first insulating member, the avoidance groove is used to accommodate at least part of the connecting member, reducing the internal space of the battery occupied by the connecting member, thereby improving the utilization rate of the internal space of the battery and further increasing the battery energy density. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is an exploded view of the cover plate assembly provided by the embodiment of the present application;

[0030] Figure 2 is a top view of the cover plate assembly provided by the embodiment of the present application;

[0031] Figure 3 is Figure 2 a cross-sectional view taken along A-A in

[0032] Figure 4 is Figure 3 a partial enlarged view of the dashed box in

[0033] Description of the Reference Numerals:

[0034] 10 - top cover;

[0035] 11 - protrusion; 111 - opening; 12 - accommodation space;

[0036] 20 - pole column;

[0037] 21 - positive pole column; 22 - negative pole column; 23 - first pole column; 24 - second pole column;

[0038] 201 - accommodation cavity; 202 - groove; 203 - welding part;

[0039] 30 - connecting member;

[0040] 31 - connecting piece; 32 - connecting column;

[0041] 40 - first insulating member;

[0042] 41 - avoidance groove;

[0043] 50 - second insulating member. Detailed Embodiments

[0044] Generally, the cover plate assembly occupies part of the internal space of the battery, reducing the battery energy density. The reason for this problem is that in the related art, one side of the connecting piece is electrically connected to the pole column, and the other side is electrically connected to the electrode assembly. Since the electrode assembly is located inside the battery and the pole column is installed on the top cover of the cover plate assembly, the pole column and the connecting piece easily occupy part of the internal space of the battery. And in order to insulate under the top cover of the cover plate assembly, a lower plastic is usually provided, and the connecting piece is installed on the lower plastic, so that the connecting piece is squeezed into the internal space of the battery, further occupying the internal space of the battery.

[0045] In view of the above technical problems, the embodiments of the present application provide a cover plate assembly and a battery. By installing part of the pole column on the protrusion of the top cover, the internal space of the battery occupied by the pole column is reduced. Through the avoidance groove provided at the bottom of the first insulating part, the avoidance groove is used to accommodate at least part of the connecting piece, reducing the internal space of the battery occupied by the connecting piece, thereby improving the utilization rate of the internal space of the battery, and further improving the battery energy density.

[0046] In order to make the above objects, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0047] Refer to Figure 1 and Figure 2 , the embodiments of the present application provide a cover plate assembly, which includes a top cover 10, a pole column 20, a connecting piece 30 and a first insulating part 40. The top cover 10 can be in a sheet shape, for example, the top cover 10 can be a light aluminum sheet. There is a protrusion 11 on the top surface of the top cover 10. As Figure 1 shown, the protrusion 11 can be a cylindrical protrusion formed by stamping on the top cover 10. In addition, the protrusion can also be an approximately cylindrical protrusion, a cuboid protrusion or an approximately cuboid protrusion. An opening 111 is formed on the protrusion 11, and the opening 111 penetrates through the top cover 10. The opening 111 extends from the top of the protrusion 11 to the bottom of the top cover 10. The opening 111 can be used to pass through the pole column 20.

[0048] As Figure 1 and Figure 4 shown, the pole column 20 passes through the opening 111. The pole column 20 is a conductive structure connecting the inside and outside of the battery. Part of the pole column 20 is installed on the protrusion 11. Refer to Figure 4, a middle part of an outer peripheral surface of the terminal post 20 has an annular cavity, and a top wall and a side wall of the annular cavity form a clamping structure. The clamping structure is fitted and installed with a part of the protrusion 11 facing the opening 111. So that the terminal post 20 can be arranged at a position far from the battery case, and the internal space of the battery is the space inside the battery case, thereby reducing the internal space of the battery occupied by the terminal post 20.

[0049] Reference Figure 1 , the terminal post 20 includes a positive terminal post 21 and a negative terminal post 22, and the number of corresponding protrusions 11 and openings 111 is two. The positive terminal post 21 and the negative terminal post 22 are respectively inserted into the two openings 111.

[0050] The connecting member 30 is used to conduct electricity between the terminal post and the electrode assembly inside the battery. Reference Figure 1 , the number of the connecting members 30 is two. The two connecting members 30 are respectively electrically connected to the positive terminal post 21 and the negative terminal post 22. For example, one side end faces of the two connecting members 30 respectively abut against the bottoms of the positive terminal post 21 and the negative terminal post 22. The material of the connecting member 30 is a conductive material.

[0051] Reference Figure 3 and Figure 4 , the first insulating member 40 is arranged at the bottom of the top cover 10. For example, the first insulating member 40 is welded or bonded to the bottom of the top cover 10. The first insulating member 40 is used to isolate the top cover 10 from the electrode assembly and other structures below the top cover 10, so that the top cover 10 is insulated from the electrode assembly and other structures below the top cover 10. The first insulating member 40 can be made of plastic materials such as polycarbonate, polyamide, and polypropylene.

[0052] Reference Figure 4 , an avoidance groove 41 is formed at the bottom of the first insulating member 40. The avoidance groove 41 is used to accommodate at least part of the connecting member 30, and at least part of the connecting member 30 is located inside the connecting member 30, thereby reducing the internal space of the battery occupied by the connecting member 30. So that the connecting member 30 can be arranged at a position far from the battery case, and the internal space of the battery is the space inside the battery case, thereby reducing the internal space of the battery occupied by the connecting member 30.

[0053] The present application provides a cover plate assembly. By installing a part of the terminal post 20 on the protrusion 11 of the top cover 10, the terminal post 20 can be arranged at a position far from the battery case, and the internal space of the battery is the space inside the battery case, thereby reducing the internal space of the battery occupied by the terminal post 20. Through the avoidance groove 41 arranged at the bottom of the first insulating member 40, the avoidance groove 41 is used to accommodate at least part of the connecting member 30, so that the connecting member 30 can be arranged at a position far from the battery case. By reducing the internal space of the battery occupied by the terminal post 20 and the connecting member 30, the internal space of the battery occupied by the cover plate assembly is reduced, thereby improving the utilization rate of the internal space of the battery, and further improving the battery energy density.

[0054] In some embodiments, referring to Figure 4 , a receiving cavity 201 is formed at the bottom of the terminal post 20, and part of the connecting member 30 is located in the receiving cavity 201. For example, the top of the connecting member 30 is welded or riveted to the inner top wall of the receiving cavity 201. With such an arrangement, the connecting member 30 is further away from the battery housing, further reducing the internal space of the battery occupied by the connecting member 30 and improving the battery energy density.

[0055] In some embodiments, as Figure 4 shown, the connecting member 30 includes a connecting piece 31 and a connecting post 32. The connecting piece 31 is used for electrically connecting with the tab assembly inside the battery housing. The connecting piece 31 is located below the connecting post 32, and the connecting piece 31 is electrically connected to the connecting post 32. The connecting piece 31 is in the shape of a thin sheet, and at least part of the connecting piece 31 is located in the avoiding groove 41, thereby reducing the internal space of the battery occupied by the connecting piece 31 and improving the battery energy density.

[0056] Referring to Figure 4 , the connecting post 32 is used for electrically connecting with the terminal post 20. The connecting post 32 is a protrusion extending from the connecting piece 31 away from the battery housing, and the shape of the connecting post 32 can be cylindrical, approximately cylindrical, strip-shaped or approximately strip-shaped. At least part of the connecting post 32 is located in the receiving cavity 201, thereby reducing the internal space of the battery occupied by the connecting post 32 and improving the battery energy density.

[0057] In some embodiments, referring to Figure 4 , the top of the connecting post 32 abuts against the inner top wall of the receiving cavity 201, thereby facilitating the electrical connection between the connecting post 32 and the terminal post 20, and maximizing the use of the internal space of the receiving cavity 201 to accommodate the connecting post 32, further reducing the internal space of the battery occupied by the connecting post 32 and improving the battery energy density.

[0058] In some embodiments, as Figure 4 shown, a groove 202 is formed at the top of the terminal post 20. For example, the groove 202 is coaxially arranged with the terminal post 20. The terminal post 20 includes a welding portion 203. Referring to Figure 4 , the welding portion 203 is located between the bottom of the groove 202 and the inner top wall of the receiving cavity 201. Or rather, the portion of the terminal post between the groove wall of the groove 202 and the inner wall top of the receiving cavity 201 forms the welding portion 203.

[0059] The welding part 203 is penetrated and welded with the connecting column 32. For example, laser penetration welding is used. Laser penetration welding locally heats the material with a high-energy laser beam. The energy of the laser radiation diffuses into the material through heat conduction, melting the material to form a specific molten pool. In laser deep penetration welding, after the laser beam penetrates the upper layer of the material, the surface of the lower layer of the material absorbs the laser energy and melts. The two layers of melted materials are fused under the action of the welding pressure and form a firm weld seam after cooling. By setting the welding part 203 in this way, the thickness of the welding part 203 is smaller, which is convenient for welding.

[0060] In some embodiments, referring to Figure 4 , the pole column 20 includes a first pole column 23 and a second pole column 24. It should be noted that both the positive pole column 21 and the negative pole column 22 in the pole column 20 can include the first pole column 23 and the second pole column 24. The connection method between the first pole column 23 and the second pole column 24 can be welding such as laser penetration welding or riveting, etc.

[0061] The first pole column 23 is installed on the protrusion 11. For example, the first pole column 23 is crimped on the protrusion 11. The second pole column 24 abuts against the first pole column 23, so that the first pole column 23 and the second pole column 24 are electrically connected. The welding part 203 is arranged on the second pole column 24. For example, the groove 202 extends from the top of the first pole column 23 to the bottom of the first pole column 23. The cavity 201 is arranged at the bottom of the second pole column 24. It is convenient to weld the second pole column 24 and the connecting column 32, so that the second pole column 24 and the connecting column 32 are electrically connected.

[0062] In some embodiments, a receiving space 12 is formed between the bottom of the protrusion 11 and the bottom of the top cover 10. The receiving space 12 is communicated with the opening 111. The bottom of the second pole column 24 is located in the receiving space 12, so that the base of the second pole column 24 can expand outwards, increasing the structural strength and electrical conductivity of the pole column 20.

[0063] In some embodiments, referring to Figure 4 , a part of the first insulating member 40 is clamped between the bottom of the top cover 10 and the bottom of the pole column 20. As Figure 4 shown, a part of the second insulating member 50 is clamped between the bottom of the top cover 10 and the bottom of the second pole column 24. Thus, the bottom of the pole column 20 is insulated from the top cover 10, improving the insulation of the cover assembly.

[0064] In some embodiments, referring to Figure 1 and Figure 4 , the cover assembly further includes a second insulating member 50. A part of the second insulating member 50 is clamped between the top of the pole column 20 and the protrusion 11. For example, referring to Figure 4, A part of the second insulating member 50 is clamped between the first pole 23 and the protrusion 11. Thereby, the top of the pole 20 is insulated from the top cover 10, improving the insulation of the cover assembly.

[0065] The present application also provides a battery, which can be a battery applied in products such as vehicles, mobile phones, portable devices, laptops, ships, spacecrafts, electric toys, and electric tools.

[0066] The battery includes a housing, a cover assembly, and an electrode assembly. The battery can be a square shell battery, and the housing corresponds to a rectangular hollow housing. The top of the housing has an opening, which facilitates the arrangement of structures such as the electrode assembly inside the housing.

[0067] The cover assembly can adopt the solution in any of the above embodiments, and the specific structure of the cover assembly can be referred to the above embodiments. The cover assembly is installed at the opening and closes the opening. For example, the cover assembly is welded to the inner wall of the opening.

[0068] The electrode assembly is located inside the housing. The electrode assembly includes electrode tabs. For example, the electrode tabs include a positive electrode tab and a negative electrode tab, and the positive electrode tab and the negative electrode tab are electrically connected to the positive pole 21 and the negative pole 22 in the cover assembly respectively.

[0069] Since the battery in this embodiment adopts all the technical solutions of any of the above embodiments, it has at least all the beneficial effects brought by any of the above embodiments, which will not be elaborated here one by one.

[0070] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other.

[0071] It should be noted that phrases such as "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes the specific feature, structure, or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining an embodiment to describe a specific feature, structure, or characteristic, it is within the knowledge scope of those skilled in the art to implement such a feature, structure, or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0072] Generally speaking, terms should be understood at least partially based on their usage in the context. For example, at least partially according to the context, the term "one or more" used in the text can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, at least partially according to the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0073] It should be readily understood that the terms "on", "above", and "over" in this disclosure should be construed in the broadest manner such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0074] In addition, for ease of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatial relative descriptors used in the text may be interpreted accordingly.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application 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 on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cover plate assembly, characterized in that: include: A top cover, wherein the top cover has a protrusion, and the protrusion has an opening penetrating through the top cover; A pole, the pole is inserted into the opening, and a portion of the pole is mounted on the protrusion; A connector, the connector being electrically connected to the pole; A first insulating member, wherein the first insulating member is located at the bottom of the top cover, and an escape groove is formed at the bottom of the first insulating member, and the escape groove is used to accommodate at least a portion of the connecting member.

2. The cover plate assembly according to claim 1, characterized in that: A receiving cavity is provided at the bottom of the pole, and part of the connecting member is located in the receiving cavity.

3. The cover plate assembly according to claim 2, characterized in that: The connecting member includes a connecting piece and a connecting column, at least a portion of the connecting piece is located in the avoidance groove, and at least a portion of the connecting column is located in the accommodating cavity.

4. The cover plate assembly according to claim 3, characterized in that: The top of the connecting column abuts against the inner top wall of the accommodating cavity.

5. The cover plate assembly according to claim 3 or 4, characterized in that: A groove is formed on the top of the pole. The pole comprises a welding portion, which is located between the bottom of the groove and the inner top wall of the accommodating cavity. The welding portion and the connecting column are penetrated and welded.

6. The cover plate assembly according to claim 5, characterized in that: The pole includes a first pole and a second pole, the first pole is mounted on the protrusion, the second pole is abutted against the bottom of the first pole, and the welding portion is arranged on the second pole.

7. The cover plate assembly according to claim 6, characterized in that: An accommodating space is formed between the bottom of the protrusion and the bottom of the top cover. The accommodating space is communicated with the opening, and the bottom of the second pole is located in the accommodating space.

8. The cover plate assembly according to any one of claims 1 to 4, characterized in that: A portion of the first insulating member is sandwiched between the bottom of the top cover and the bottom of the pole.

9. The cover plate assembly according to any one of claims 1 to 4, characterized in that: The cover plate assembly further includes a second insulating member, a portion of which is sandwiched between the top of the pole and the protrusion.

10. A battery, characterized in that: include: A shell, wherein the top of the shell has an opening; A cover plate assembly, wherein the cover plate assembly is the cover plate assembly according to any one of claims 1 to 9, and the cover plate assembly is installed at the opening and closes the opening; An electrode assembly is located in the shell, and the electrode assembly includes a pole ear, and the pole ear is electrically connected to the pole of the cover plate assembly.

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