Cover plate assembly and battery
By using a non-integrated insulating member structure on the cover assembly, the problems of poor insulation effect and high production cost on the top of the cover assembly are solved, and better insulation effect and reduced production cost are achieved.
Patent Information
- Application Number
- CN202421688863.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The top insulation effect of the cover plate assembly is poor, the production cost of insulation patches with convex hulls is high, and the transition area between the convex hull and the non-convex hull is prone to fall off, resulting in poor insulation effect.
The first insulating member and the second insulating member are adopted, and the first insulating member is covered on the protrusion, and the second insulating member is attached to the top surface of the top cover except the protrusion, and the pole pillars are arranged in the opening to form a good insulating structure.
It improves the insulation effect on the top of the battery cover plate, reduces production costs, and avoids the problem of easy falling off of the insulator.
Smart Images
Figure CN222940024U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and in particular, to a cover plate assembly and a battery. Background Art
[0002] With the increasing maturity of new energy vehicle technologies, 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] An insulating patch is attached to the upper surface of the cover plate assembly of the battery. For a cover plate assembly with a protrusion on the top, the insulating patch has a convex bulge at the protruding position of the cover plate assembly to insulate the top of the cover plate assembly and improve the safety of the battery.
[0004] However, the insulating effect of the top of the cover plate assembly is poor, and the production cost of the insulating patch with a convex bulge is high. Utility Model Content
[0005] This application provides a cover plate assembly and a battery, which are used to improve the insulating effect of the top of the cover plate assembly and reduce the production cost.
[0006] To achieve the above object, this application provides the following technical solutions:
[0007] On the one hand, this application provides a cover plate assembly, including:
[0008] A top cover, on the top surface of which there is a protrusion, and an opening is provided in the protrusion that penetrates the top cover;
[0009] An insulating member, the insulating member includes a first insulating member and a second insulating member that are not integrally formed. The first insulating member covers the protrusion, and the second insulating member is attached to the top surface of the top cover except the protrusion;
[0010] A pole column, the pole column is inserted into the opening.
[0011] Based on the above technical solution, this application can also be improved as follows.
[0012] In a possible implementation, the first insulating member includes a horizontal portion and a first convex ring, the first convex ring is connected to the outer periphery of the horizontal portion, the horizontal portion is crimped on the top of the protrusion, and the first convex ring surrounds the outer periphery of the protrusion.
[0013] In a possible implementation, the first insulating member further includes a second convex ring, the second convex ring is connected to the part of the horizontal portion facing the opening, and the second convex ring is clamped between the pole column and the protrusion.
[0014] In a possible implementation, the first insulating member further includes a third convex ring. The third convex ring and the first convex ring are respectively located on two sides of the horizontal portion in the thickness direction, and the third convex ring surrounds the outside of the pole column.
[0015] In a possible implementation, the third convex ring and the horizontal portion form a stepped structure, and a part of the pole column overlaps on the stepped structure.
[0016] In a possible implementation, the top of the third convex ring is flush with the top surface of the pole column.
[0017] In a possible implementation, the cover plate assembly further includes a sealing ring. The sealing ring is sleeved on the outer periphery of the pole column, and the sealing ring is used to seal the gap between the pole column and the top cover.
[0018] In a possible implementation, the second insulating member is a horizontally arranged patch structure.
[0019] In a possible implementation, the cover plate assembly further includes a third insulating member. The third insulating member is located at the bottom of the top cover, and a part of the third insulating member is located between the pole column and the top cover.
[0020] On the other hand, the present application provides a battery, including:
[0021] A housing having an opening at the top;
[0022] A cover plate assembly, which adopts the cover plate assembly in any one of the above, and the cover plate assembly is installed at the opening and closes the opening;
[0023] An electrode assembly located inside the housing. The electrode assembly includes a tab, and the tab is electrically connected to the pole column of the cover plate assembly.
[0024] The cover plate assembly and the battery provided by the present application have the following beneficial effects:
[0025] The cover plate assembly includes a top cover insulating member and a pole column. Since there is a protrusion on the top surface of the top cover and a through hole penetrating the top cover is provided on the protrusion, the pole column can be inserted through the through hole, so that the cover plate assembly can be connected to the inside and outside of the battery through the pole column. The insulating member includes a first insulating member and a second insulating member. By covering the protrusion with the first insulating member, the protrusion on the top cover is insulated from the outside. By attaching the second insulating member to the top surface of the top cover except the protrusion, the part of the top cover except the protrusion is insulated from the outside, so that the top of the cover plate assembly is insulated from the outside world.
[0026] Compared with the prior art, the transition area between the convex part and the non-convex part of the insulating patch is likely to fall off after attachment, resulting in poor insulation effect of the cover plate assembly. In the cover plate assembly and the battery provided by the present application, the first insulating member and the second insulating member are not integrally formed, which makes the first insulating member and the second insulating member easy to install, and they are not likely to fall off after installation, improving the insulation effect at the top of the battery cover plate. Compared with the insulating patch with a convex part in the prior art, the cover plate assembly and the battery provided by the present application adopt a structure in which the first insulating member and the second insulating member are not integrally formed, enabling the first insulating member and the second insulating member to be separately produced and processed, with simple processing technology and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] 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 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.
[0028] Figure 1 is an exploded view of the cover plate assembly provided by the embodiment of the present application;
[0029] Figure 2 is a top view of the cover plate assembly provided by the embodiment of the present application;
[0030] Figure 3 is Figure 2 a cross-sectional view taken along A-A in
[0031] Figure 4 is Figure 3 a partial enlarged view of the dashed box in
[0032] Figure 5 is a cross-sectional structural schematic diagram of the first insulating member provided by the embodiment of the present application.
[0033] DESCRIPTION OF REFERENCE NUMERALS:
[0034] 10 - top cover;
[0035] 11 - protrusion; 111 - opening;
[0036] 20 - insulating member;
[0037] 21 - first insulating member; 211 - horizontal part; 212 - first convex ring; 213 - second convex ring;
[0038] 214 - third convex ring; 22 - second insulating member;
[0039] 30 - pole post;
[0040] 31 - Positive electrode terminal; 32 - Negative electrode terminal;
[0041] 40 - Sealing ring;
[0042] 50 - Third insulating member. Detailed implementation manner
[0043] Generally, the insulating effect of the top of the cover plate assembly is poor, and the production cost of the insulating patch with convex bumps is high. The reason for this problem is that in the related art, the insulating patch with convex bumps is attached to the top of the cover plate assembly, and the transition area between the convex bump part and the non - convex bump part is likely to fall off after attachment, driving the overall detachment of the insulating patch, resulting in poor insulating effect at the top of the cover plate assembly. Due to the existence of convex bumps, the insulating patch with convex bumps has a complex processing technology and high production cost.
[0044] In view of the above - mentioned technical problems, the embodiments of the present application provide a cover plate assembly and a battery. By including a first insulating member and a second insulating member that are not integrally formed, the first insulating member covers the convexity, and the second insulating member fits on the top surface of the top cover except for the convexity. There is no transition area between the convex bump part and the non - convex bump part of the insulating member, and the first insulating member and the second insulating member are not likely to fall off after installation, improving the insulating effect at the top of the battery cover plate. The insulating member can be processed separately, thereby reducing the production cost of the insulating member.
[0045] In order to make the above - mentioned 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 a 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 making creative efforts shall fall within the protection scope of the present application.
[0046] Refer to Figure 1 and Figure 2 , the present application provides a cover plate assembly, which includes a top cover 10, an insulating member 20, and a terminal 30. The top cover 10 can be in a sheet shape, such as the top cover 10 can be a bright aluminum sheet. There is a convexity 11 on the top surface of the top cover 10. As Figure 1 shown, the convexity 11 can be a cylindrical convexity formed by stamping on the top cover 10. In addition, the convexity can also be an approximately cylindrical convexity, a cuboid convexity, or an approximately cuboid convexity. An opening 111 is provided on the convexity 11, and the opening 111 penetrates through the top cover 10. The opening 111 extends from the top of the convexity 11 to the bottom of the top cover 10. The opening 111 can be used for passing through the terminal 30.
[0047] The insulating member 20 is used to insulate the top of the cover plate assembly from the outside. The material of the insulating member 20 can be a thermoplastic plastic, such as polycarbonate, polyamide, polypropylene, etc. Refer toFigure 1 , the insulating member 20 includes a first insulating member 21 and a second insulating member 22 that are not integrally formed. For example, the first insulating member 21 and the second insulating member are separate parts, and the first insulating member 21 and the second insulating member 22 are independently produced and processed.
[0048] As Figure 3 and Figure 4 shown, the first insulating member 21 covers the protrusion 11. The first insulating member 21 may have an umbrella-like structure. The top of the umbrella-like structure covers and surrounds the top of the protrusion 11, and the peripheral surface of the umbrella-like structure surrounds the outer peripheral surface of the protrusion 11, so that the protrusion 11 is insulated from the outside.
[0049] As Figure 1 and Figure 4 shown, the second insulating member 22 is attached to the top surface of the part of the top cover 10 other than the protrusion 11. As Figure 1 shown, the part of the top cover 10 other than the protrusion 11 has a horizontal plate-like structure, and the second insulating member 22 is a flat sheet. The flat sheet is attached to the top plane of the horizontal plate-like structure. For example, the bottom of the flat sheet is adhered to the top plane of the horizontal plate-like structure.
[0050] As Figure 1 shown, the pole column 30 passes through the opening 111. The pole column 30 is a conductive structure connecting the inside and outside of the battery. Referring to Figure 1 , the pole column 30 includes a positive pole column 31 and a negative pole column 32, and the number of corresponding protrusions 11 and openings 111 is two. The positive pole column 31 and the negative pole column 32 are respectively passed through the two openings 111.
[0051] The present application provides a cover assembly. The insulating member 20 in the cover assembly includes a first insulating member 21 and a second insulating member 22. By covering the protrusion 11 with the first insulating member 21, the protrusion 11 on the top cover 10 is insulated from the outside. By attaching the second insulating member 22 to the top surface of the part of the top cover 10 other than the protrusion 11, the part of the top cover 10 other than the protrusion is insulated from the outside, so that the top of the cover assembly is insulated from the outside.
[0052] Since the first insulating member 21 and the second insulating member 22 are not integrally formed, the first insulating member 21 and the second insulating member 22 are easy to install. There is no transition area between the first insulating member 21 and the second insulating member 22, so that the first insulating member 21 and the second insulating member 22 are not easily detached after installation, improving the insulation effect of the top of the battery cover. The non-integrally formed first insulating member 21 and second insulating member 22 are separately produced and processed, with a simple processing technology and low production cost.
[0053] In some embodiments, as Figure 4 and Figure 5As shown, the first insulating member 21 includes a horizontal portion 211 and a first convex ring 212. The horizontal portion 211 and the first convex ring 212 can be a plastic structure integrally formed by an injection molding process.
[0054] The horizontal portion 211 can be in the form of a thin sheet or a thin plate, and the horizontal portion 211 is crimped on the protrusion 11. Refer to Figure 4 , the bottom of the horizontal portion 211 is crimped on the top of the protrusion 11, so that the top of the protrusion 11 is insulated from the outside. A cavity is provided on the horizontal portion 211, and the cavity communicates with the opening 111, so as to avoid the pole column 30, so that the pole column 30 can pass through the first insulating member 21. The pole column 30 can be crimped on the horizontal portion 211 of the horizontal portion 211 outside the cavity.
[0055] Refer to Figure 4 and Figure 5 , the first convex ring 212 is an annular protrusion extending from the outer periphery of the horizontal portion 211 toward the top cover 10, and the first convex ring 212 surrounds the outer periphery of the protrusion 11, so that the side wall of the protrusion 11 in the vertical direction or approximately the vertical direction is insulated from the outside.
[0056] With such a setting, the first insulating member 21 covers the protrusion 11, so that the top surface of the top cover 10 at the position of the protrusion 11 is insulated from the outside.
[0057] In some embodiments, as shown in Figure 4 and Figure 5 , the first insulating member 21 further includes a second convex ring 213, and the second convex ring 213 is an annular protrusion extending from the portion of the horizontal portion 211 facing the opening 111 toward the top cover 10. The second convex ring 213 is closer to the opening 111 than the first convex ring 212.
[0058] As shown in Figure 4 , the second convex ring 213 is clamped between the pole column 30 and the protrusion 11, and the pole column 30 and the protrusion 11 are respectively located on both sides of the second convex ring 213. For example, a part of the pole column 30 abuts against the inside of the second convex ring 213, and the protrusion 11 abuts against the outside of the second convex ring 213. Thus, the pole column 30 and the protrusion 11 are insulated from each other, and the pole column 30 is prevented from being electrically connected to the top cover 10.
[0059] In some embodiments, as shown in Figure 4 and FIG. 5, the first insulating member 21 further includes a third convex ring 214, and the third convex ring 214 is an annular protrusion extending from the horizontal portion 211 away from the top cover 10. The third convex ring 214 and the first convex ring 212 are respectively located on both sides in the thickness direction of the horizontal portion 211. Refer to Figure 5 , the third convex ring 214 is located above the horizontal portion 211, and the first convex ring 212 is located below the horizontal portion 211. Refer to Figure 4, the outer peripheral surface of a part of the pole column 30 abuts against the inner wall of the third convex ring, and the third convex ring 214 surrounds the outside of the pole column 30, so that the outer periphery of the pole column 30 is insulated.
[0060] In some embodiments, such as Figure 4 and 5 shown, the third convex ring 214 and the horizontal portion 211 form a stepped structure. As Figure 4 shown, a part of the pole column 30 overlaps on the stepped structure. For example, the middle part of the outer peripheral surface of the pole column 30 has an annular cavity, and the top wall and the side wall of the annular cavity form a clamping structure. The clamping structure is installed in cooperation with the stepped structure. The top wall of the annular cavity is pressed against the horizontal portion 211, and at least a part of the side wall of the annular cavity abuts against the third convex ring 214, so that the pole column 30 can be conveniently installed on the first insulating member 21.
[0061] In some embodiments, the top of the third convex ring 214 is flush with the top surface of the pole column 30, so that all the outer peripheral surfaces of the pole column 30 are insulated from the outside, further improving the insulation of the pole column 30.
[0062] In some embodiments, such as Figure 1 and Figure 4 shown, the cover plate assembly further includes a sealing ring 40, and the sealing ring 40 is sleeved on the outer periphery of the pole column 30. Referring to Figure 4 , the sealing ring 40 is sleeved on the pole column 30. The sealing ring 40 is located below the first insulating member 21, and the sealing ring 40 is located between the pole column 30 and the top cover 10, so that the sealing ring can seal the gap between the pole column 30 and the top cover 10, improving the tightness of the cover plate assembly.
[0063] In some embodiments, referring to Figure 1 , the second insulating member 22 is a horizontally arranged patch structure to facilitate attaching the second insulating member 22 to the top surface of other parts of the top cover 10 except the protrusion 11. And the flat and thin patch structure is convenient for processing and has low production cost, thus reducing the production cost of the cover plate assembly.
[0064] In some embodiments, referring to Figure 1 and Figure 4 , the cover plate assembly further includes a third insulating member 50. The third insulating member 50 is located at the bottom of the top cover 10 to insulate the top cover 10 from structures such as the electrode assembly below the top cover 10. For example, the third insulating member 50 is welded or bonded to the bottom of the top cover 10. A part of the third insulating member 50 is located between the pole column 30 and the top cover 10. As Figure 4 shown, the part of the third insulating member 50 close to the opening 111 is clamped between the bottom of the pole column 30 and the top of the top cover 10, further strengthening the insulation between the pole column 30 and the top cover 10.
[0065] The present application also provides a battery, which can be a battery used 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 plate assembly, and an electrode assembly. The battery can be a square shell battery, and the housing correspondingly is a rectangular hollow housing. The top of the housing has an opening, which facilitates the setting of structures such as the electrode assembly into the housing.
[0067] The cover plate assembly can adopt the solution in any of the above embodiments, and for the specific structure of the cover plate assembly, refer to the above embodiments. The cover plate assembly is installed at the opening and closes the opening. For example, the cover plate assembly is welded to the inner wall of the opening.
[0068] The electrode assembly is located inside the housing. The electrode assembly includes tab ears. For example, the tab ears include a positive tab ear and a negative tab ear, and the positive tab ear and the negative tab ear are electrically connected to the positive terminal post 31 and the negative terminal post 32 in the cover plate 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 one by one here.
[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", and "exemplarily" mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures, or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures, or characteristics 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 as conveying a singular usage or a plural usage.
[0073] It should be easily understood that the terms "on", "above", and "over" in this disclosure should be construed in the broadest manner so 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 explanation, 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 descriptive terms used in the text may be interpreted accordingly as well.
[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not 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 recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions 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 surface of the top cover has a protrusion, and the protrusion is provided with an opening penetrating the top cover; An insulating member, the insulating member includes a first insulating member and a second insulating member that are not formed in one piece, the first insulating member is covered on the protrusion, and the second insulating member is attached to the top surface of the top cover except the protrusion; A pole is inserted into the opening.
2. The cover plate assembly according to claim 1, characterized in that: The first insulating member includes a horizontal portion and a first convex ring, the first convex ring is connected to the outer periphery of the horizontal portion, the horizontal portion is crimped on the top of the protrusion, and the first convex ring is arranged around the outer periphery of the protrusion.
3. The cover plate assembly according to claim 2, characterized in that: The first insulating member further includes a second convex ring, the second convex ring is connected to a portion of the horizontal portion facing the opening, and the second convex ring is sandwiched between the pole and the protrusion.
4. The cover plate assembly according to claim 3, characterized in that: The first insulating member further includes a third convex ring, the third convex ring and the first convex ring are respectively located on both sides of the horizontal portion in the thickness direction, and the third convex ring is arranged around the outer side of the pole.
5. The cover plate assembly according to claim 4, characterized in that: The third convex ring and the horizontal portion form a step structure, and a portion of the pole is overlapped on the step structure.
6. The cover plate assembly according to claim 4, characterized in that: The top of the third convex ring is flush with the top surface of the pole.
7. The cover plate assembly according to any one of claims 1 to 6, characterized in that: The cover plate assembly further comprises a sealing ring, which is sleeved on the outer circumference of the pole and is used to seal a gap between the pole and the top cover.
8. The cover plate assembly according to any one of claims 1 to 6, characterized in that: The second insulating member is a horizontal patch structure.
9. The cover plate assembly according to any one of claims 1 to 6, characterized in that: The cover plate assembly further includes a third insulating member, which is located at the bottom of the top cover, and a portion of the third insulating member is located between the pole and the top cover.
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.