Battery cover plate and battery

Abstract

The utility model provides a kind of battery cover plate and battery, the battery cover plate includes: cover plate body, cover plate body is equipped with the mounting hole being penetrated along its thickness direction;Pole assembly, pole assembly includes first connecting piece and second connecting piece;First connecting piece includes first limiting part and first plug-in part, and first plug-in part is plugged into mounting hole;Second connecting piece includes second limiting part and second plug-in part, cover plate body is located between first limiting part and second limiting part, and second plug-in part is inserted in the plug-in hole of first plug-in part and is connected with its interference;Sealing ring, sealing ring is sleeved in first plug-in part, the inner periphery of sealing ring and first plug-in part abut, and the outer periphery of sealing ring and the inner wall surface of mounting hole abut;Insulating film, between first limiting part and cover plate body, between second limiting part and cover plate body are equipped in insulating film;Insulating film, cover plate body and sealing ring are clamped and fixed by first limiting part and second limiting part.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery cover and a battery. Background Technology

[0002] With the continuous trend towards miniaturization and high performance in portable electronic devices, micro batteries, as key power supply components, face stringent market demands regarding their size, performance, and stability. Currently, the terminals and cover plates of micro batteries are typically joined using thermoforming or riveting techniques. However, thermoforming is susceptible to electrolyte interference, leading to corrosion of the passivation layer and reduced connection reliability, which in turn affects the battery's sealing and lifespan. While riveting improves connection reliability, it usually employs an encapsulation structure to insulate the terminals and cover plate, resulting in a relatively large encapsulation thickness that is difficult to meet the requirements for thinner and lighter designs. Utility Model Content

[0003] This utility model provides a new technical solution for battery cover, which can at least solve the problem that the existing battery cover structure is not conducive to the design of thin and light batteries.

[0004] This utility model also provides a new technical solution for batteries.

[0005] According to a first aspect of the present invention, a battery cover is provided, comprising: a cover body having a mounting hole extending through its thickness; a terminal assembly including a first connector and a second connector; the first connector including a first limiting portion and a first insertion portion, the first insertion portion being inserted into the mounting hole; the second connector including a second limiting portion and a second insertion portion, the cover body being located between the first limiting portion and the second limiting portion, the second insertion portion being inserted into the insertion hole of the first insertion portion and interference-fitted thereto; a sealing ring fitted onto the first insertion portion, the inner circumferential surface of the sealing ring abutting against the first insertion portion, and the outer circumferential surface of the sealing ring abutting against the inner wall surface of the mounting hole; an insulating film disposed between the first limiting portion and the cover body, and between the second limiting portion and the cover body; the insulating film, the cover body, and the sealing ring being clamped and fixed by the first limiting portion and the second limiting portion.

[0006] Optionally, the sealing ring is located between the two insulating films, which are bonded to the cover plate body.

[0007] Optionally, the insulating film is bonded to the cover plate body by a thermosetting adhesive layer.

[0008] Optionally, the insulating film is a PEEK film or a PI film.

[0009] Optionally, the thickness of the insulating film is 0.015 mm to 0.03 mm.

[0010] Optionally, the hardness of the first connector is less than the hardness of the second connector.

[0011] Optionally, the first connector is an aluminum rivet, and the second connector is a steel rivet.

[0012] Optionally, the cover plate body has explosion-proof grooves on one side in its thickness direction.

[0013] Optionally, the insertion hole is a through hole.

[0014] According to a second aspect of the present invention, a battery is provided, comprising the battery cover as described in any of the preceding claims.

[0015] According to this utility model, the battery cover utilizes an insulating film as the insulating structure between the terminal assembly and the cover body. Compared with the existing rubber-coated structure, the insulating film can be designed to be thinner, thereby reducing the overall thickness of the battery cover and facilitating the lightweight design of micro batteries, or effectively increasing battery capacity without reducing battery volume. A sealing ring is provided on the outer periphery of the first insertion portion, achieving a good sealing effect without increasing the overall thickness of the battery cover. Compared with the rubber-coated structure, this not only reduces the overall thickness of the battery cover but also ensures reliable sealing. Furthermore, the cover body, insulating film, and sealing ring are clamped and fixed by the first limiting portion of the first connector and the first limiting portion of the second connector. Compared with hot-press bonding, no passivation treatment of the components is required, thus significantly enhancing the reliability of the battery cover connection and sealing. Moreover, the structure is simple and easy to manufacture.

[0016] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0018] Figure 1 This is a schematic diagram of the structure of a battery cover according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle circle;

[0020] Figure 3This is a schematic diagram of the battery cover plate before assembly according to an embodiment of the present invention.

[0021] Figure Labels

[0022] 100. Battery cover;

[0023] 10. Cover plate body; 11. Explosion-proof groove; 20. Pole post assembly; 21. First connector; 211. First limiting part; 212. First insertion part; 22. Second connector; 221. Second limiting part; 222. Second insertion part; 30. Sealing ring; 40. Insulating film. Detailed Implementation

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0026] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0027] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0028] 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 discussed further in subsequent figures.

[0029] The battery cover 100 according to an embodiment of the present utility model will now be described in detail with reference to the accompanying drawings.

[0030] like Figures 1 to 3 As shown, the battery cover 100 according to an embodiment of the present utility model includes: a cover body 10, an electrode assembly 20, a sealing ring 30, and an insulating film 40.

[0031] Specifically, the cover plate body 10 is provided with a mounting hole extending through its thickness direction, and the pole post assembly 20 includes a first connector 21 and a second connector 22; the first connector 21 includes a first limiting part 211 and a first insertion part 212, the first insertion part 212 being inserted into the mounting hole; the second connector 22 includes a second limiting part 221 and a second insertion part 222, the cover plate body 10 being located between the first limiting part 211 and the second limiting part 221, and the second insertion part 222 being inserted into the insertion part of the first insertion part 212. The mounting hole is connected to it with an interference fit; the sealing ring 30 is sleeved on the first insertion part 212, the inner circumferential surface of the sealing ring 30 abuts against the first insertion part 212, and the outer circumferential surface of the sealing ring 30 abuts against the inner wall surface of the mounting hole; the insulating film 40 is provided between the first limiting part 211 and the cover plate body 10, and between the second limiting part 221 and the cover plate body 10; the insulating film 40, the cover plate body 10 and the sealing ring 30 are clamped and fixed by the first limiting part 211 and the second limiting part 221.

[0032] In other words, such as Figures 1 to 3 As shown, the battery cover 100 according to this embodiment of the present invention is mainly used in micro batteries. The battery cover 100 mainly includes a cover body 10 and a terminal assembly 20. The cover body 10 can be made of steel sheet, which has high mechanical strength and can meet the usage requirements of the battery. The cover body 10 is provided with mounting holes that penetrate along the thickness direction of the cover body 10. The terminal assembly 20 can be a positive terminal assembly 20 or a negative terminal assembly 20.

[0033] like Figures 1 to 3 As shown, the pole assembly 20 mainly includes a first connector 21 and a second connector 22. The first connector 21 mainly consists of an integrally formed first limiting part 211 and a first insertion part 212. The first insertion part 212 is formed into a cylindrical structure, and the first limiting part 211 is formed into a ring-shaped structure and disposed on the outer periphery of the first insertion part 212. The first insertion part 212 is inserted into the mounting hole and spaced apart from the inner wall surface of the mounting hole. The first limiting part 211 is located on the first side of the cover plate body 10. The second connector 22 mainly consists of an integrally formed second limiting part 221 and a second insertion part 222. The second insertion part 222 is formed into a cylindrical structure, and the second limiting part 221 is formed into a ring-shaped structure and disposed on the outer periphery of the second insertion part 222. The second limiting part 221 is located on the second side of the cover plate body 10. The first insertion part 212 is provided with an insertion hole suitable for inserting the second insertion part 222. The second insertion part 222 is inserted into the insertion hole of the first insertion part 212 and is interference-connected to it.

[0034] The first insertion portion 212 is fitted with a sealing ring 30, which can be a corrosion-resistant rubber ring. The inner circumferential surface of the sealing ring 30 abuts against the outer circumferential surface of the first insertion portion 212, and the outer circumferential surface of the sealing ring 30 abuts against the inner wall surface of the mounting hole, thereby achieving a reliable seal between the terminal assembly 20 and the cover plate body 10. This sealing ring 30 does not occupy space in the thickness direction of the battery cover plate 100, therefore it does not increase the overall thickness of the battery cover plate 100, and it still provides a reliable seal.

[0035] An insulating film 40 is provided between the first limiting part 211 and the first side of the cover plate body 10, which can separate the first limiting part 211 from the cover plate body 10. An insulating film 40 is provided between the second limiting part 221 and the second side of the cover plate body 10, which can separate the second limiting part 221 from the cover plate body 10. Thus, the insulation between the terminal post assembly 20 and the cover plate body 10 can be achieved by the insulating films 40 provided on both sides of the cover plate body 10. The insulating film 40 is not limited by the manufacturing process, so it can be designed to be thinner, and its thickness is much smaller than that of the traditional rubber-coated structure, which is conducive to the lightweight design of the battery cover plate 100. The insulating film 40, the cover plate body 10, and the sealing ring 30 are clamped and fixed by the first limiting part 211 and the second limiting part 221. In use, even if the electrolyte passes through the insulating film 40 on the inner side of the battery cover plate 100, the sealing ring 30 can still provide a good seal.

[0036] Therefore, according to the battery cover 100 provided in this embodiment, the insulating film 40 is used as the insulating structure between the terminal assembly 20 and the cover body 10. Compared with the existing adhesive structure, the insulating film 40 can be designed to be thinner, which is beneficial to reducing the overall thickness of the battery cover 100, and thus beneficial to the lightweight design of micro batteries, or to effectively increase the battery capacity without reducing the battery volume. By providing a sealing ring 30 on the outer periphery of the first insertion part 212, a good sealing effect can be achieved, and the provided sealing ring 30 does not increase the overall thickness of the battery cover 100. Compared with the adhesive structure, it is not only beneficial to reduce the overall thickness of the battery cover 100, but also to ensure the reliability of the seal. In addition, the cover body 10, the insulating film 40 and the sealing ring 30 are clamped and fixed by the first limiting part 211 of the first connector 21 and the first limiting part 211 of the second connector 22. Compared with hot pressing, there is no need to passivate the parts, so the reliability of the connection and the reliability of the seal of the battery cover 100 can be significantly enhanced. Moreover, the structure is simple and easy to manufacture.

[0037] In some embodiments of this utility model, the sealing ring 30 is located between the two insulating films 40, and the insulating films 40 are bonded to the cover plate body 10.

[0038] In other words, when assembling the battery cover 100, one insulating film 40 can first be bonded to the first side of the cover body 10, then the sealing ring 30 can be installed in the mounting hole, and subsequently, the other insulating film 40 can be bonded to the second side of the cover body 10. This integrates the insulating film 40, the sealing ring 30, and the cover body 10, facilitating the subsequent connection of the first connector 21 and the second connector 22, effectively improving the assembly efficiency of the battery cover 100. Simultaneously, this bonding method can effectively block electrolyte and prevent electrolyte penetration.

[0039] According to one embodiment of the present invention, the insulating film 40 is bonded to the cover plate body 10 by a thermosetting adhesive layer.

[0040] Specifically, when assembling the battery cover 100, thermosetting adhesive can be applied to one side of the insulating film 40, and then the insulating film 40 can be bonded to the cover body 10 using the thermosetting adhesive. After the thermosetting adhesive cures, a stable thermosetting adhesive layer is formed. This thermosetting adhesive layer has good high temperature resistance and chemical corrosion resistance, and can effectively resist the effects of high temperature and chemical corrosion during battery use, thereby ensuring that the insulating film 40 is firmly and reliably fixed to the cover body 10.

[0041] In some embodiments of this utility model, the insulating film 40 is a PEEK film or a PI film.

[0042] In other words, the insulating film 40 can be configured as a PEEK (polyetheretherketone) film. PEEK film possesses excellent electrical insulation and mechanical properties, allowing it to be manufactured thinner, thereby further optimizing the lightweight design of the battery cover 100. Furthermore, PEEK film exhibits good high-temperature resistance and chemical corrosion resistance, enabling it to withstand the effects of high-temperature environments and chemical corrosion during battery use, thus ensuring the reliability of the insulating film 40. Simultaneously, PEEK film also possesses inherent flame retardancy, effectively improving battery safety.

[0043] The insulating film 40 can also be configured as a PI (polyimide) film. PI films have excellent electrical insulation and mechanical properties, allowing the insulating film 40 to be manufactured thinner, thereby further optimizing the lightweight design of the battery cover 100. In addition, PI films have excellent high-temperature resistance and chemical corrosion resistance, enabling them to withstand the effects of high-temperature environments and chemical corrosion during battery use, thus ensuring the reliability of the insulating film 40.

[0044] According to one embodiment of the present invention, the thickness of the insulating film 40 is 0.015 mm to 0.03 mm.

[0045] In this embodiment, the insulating film 40 can be a PEEK film, and its thickness can be prepared in the range of 0.015 mm to 0.03 mm, such as 0.015 mm, 0.018 mm, 0.02 mm, 0.025 mm, 0.028 mm, and 0.03 mm. Within this thickness range, the PEEK film can further reduce the overall thickness of the battery cover 100 while ensuring insulation and mechanical properties, thereby better meeting the requirements of micro batteries for lightweight and thin design.

[0046] In some embodiments of this utility model, the hardness of the first connector 21 is less than the hardness of the second connector 22.

[0047] Specifically, during assembly, the first connector 21 and the second connector 22 need to be compressed to achieve the riveting fit between the first insertion portion 212 and the second insertion portion 222. By reducing the hardness of the first connector 21, the force required for the deformation of the first insertion portion 212 can be reduced, thereby reducing the riveting difficulty between the first connector 21 and the second connector 22. In addition, when the first insertion portion 212 deforms, it can compress the sealing ring 30 from its inner circumferential surface, thereby effectively improving the reliability of the seal.

[0048] According to one embodiment of this utility model, the first connecting member 21 is an aluminum rivet, and the second connecting member 22 is a steel rivet. Aluminum and steel rivets have relatively low costs, which helps control battery production costs.

[0049] In some embodiments of this utility model, the cover plate body 10 is provided with explosion-proof grooves 11 on one side in the thickness direction.

[0050] In this embodiment, the cover body 10 can burst and release pressure from the explosion-proof notch 11, thus eliminating the need for an additional explosion-proof valve and effectively simplifying the structure of the battery cover 100.

[0051] According to one embodiment of the present invention, the insertion hole is a through hole, which can provide sufficient insertion space for the second insertion part 222, thereby ensuring the reliability of the connection between the first connector 21 and the second connector 22.

[0052] According to an embodiment of the present invention, a battery is also provided, which can be a micro battery, and the battery includes the battery cover 100 described in any of the above embodiments. Since the battery cover 100 according to the embodiments of the present invention has the above-mentioned technical effects, the battery according to the embodiments of the present invention also has the corresponding technical effects, which will not be described again in this embodiment.

[0053] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0054] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery cover plate, characterized by, include: The cover plate body (10) is provided with a mounting hole that extends through it along its thickness direction; The pole assembly (20) includes a first connector (21) and a second connector (22); The first connector (21) includes a first limiting part (211) and a first insertion part (212), the first insertion part (212) being inserted into the mounting hole; The second connector (22) includes a second limiting part (221) and a second insertion part (222). The cover plate body (10) is located between the first limiting part (211) and the second limiting part (221). The second insertion part (222) is inserted into the insertion hole of the first insertion part (212) and is interference-fitted to it. A sealing ring (30) is fitted onto the first insertion part (212). The inner circumferential surface of the sealing ring (30) abuts against the first insertion part (212), and the outer circumferential surface of the sealing ring (30) abuts against the inner wall surface of the mounting hole. An insulating film (40) is provided between the first limiting part (211) and the cover plate body (10), and between the second limiting part (221) and the cover plate body (10); The insulating film (40), the cover plate body (10), and the sealing ring (30) are clamped and fixed by the first limiting part (211) and the second limiting part (221).

2. The battery cover plate of claim 1, wherein, The sealing ring (30) is located between the two insulating films (40), which are bonded to the cover plate body (10).

3. The battery cover plate of claim 2, wherein, The insulating film (40) is bonded to the cover plate body (10) by a thermosetting adhesive layer.

4. The battery cover plate of claim 1, wherein, The insulating film (40) is a PEEK film or a PI film.

5. The battery cover plate of claim 1, wherein, The thickness of the insulating film (40) is 0.015 mm to 0.03 mm.

6. The battery cover plate of claim 1, wherein, The hardness of the first connector (21) is less than that of the second connector (22).

7. The battery cover plate of claim 6, wherein, The first connector (21) is an aluminum rivet, and the second connector (22) is a steel rivet.

8. The battery cover plate of claim 1, wherein, The cover plate body (10) has explosion-proof grooves (11) on one side in the thickness direction.

9. The battery cover plate of claim 1, wherein, The insertion hole is a through hole.

10. A battery, characterized by The battery cover includes any one of claims 1 to 9.

Images