Battery cover and battery

Abstract

This utility model provides a battery cover and a battery. The battery cover includes: a first plate and a second plate, the first plate being welded to one side of the second plate in the thickness direction, and an installation space being formed between the first plate and the second plate; an electrode post, the electrode post including a main body and a connecting part, the connecting part being disposed on the outer periphery of the main body and in the installation space, the main body being spaced apart from the first plate and the second plate; an insulating film, the insulating film being disposed on both sides of the connecting part in the thickness direction between the connecting part and the inner wall surface of the installation space, the connecting part and the insulating film being clamped and fixed by the first plate and the second plate; and a sealing member, the sealing member being sleeved on the outer periphery of the electrode post, the first end of the sealing member abutting against the first plate and the second end of the sealing member abutting against the second plate.

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 miniaturization and high performance of portable electronic devices, micro batteries, as core power supply components, face higher requirements in terms of 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 decreased connection reliability and consequently affecting battery sealing and lifespan. While riveting improves connection reliability, it increases the thickness of the battery cover plate, hindering thinner and lighter designs and reducing battery capacity. Furthermore, in existing riveting solutions, insulation between the terminals and cover plate is usually achieved using an adhesive coating, but this structure is relatively thick and difficult to meet the requirements for thinner and lighter designs. Utility Model Content

[0003] This utility model provides a new technical solution for a battery cover, which can solve at least one of the above-mentioned technical problems.

[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 first plate and a second plate, the first plate being welded to one side of the second plate in the thickness direction, and an installation space being formed between the first plate and the second plate; an electrode post, the electrode post comprising a main body and a connecting part, the connecting part being disposed on the outer periphery of the main body and the mounting space, the main body being spaced apart from the first plate and the second plate; an insulating film, the insulating film being disposed on both sides of the connecting part in the thickness direction between the connecting part and the inner wall surface of the mounting space, the connecting part and the insulating film being clamped and fixed by the first plate and the second plate; and a sealing member, the sealing member being sleeved on the outer periphery of the electrode post, the first end of the sealing member abutting against the first plate and the second end of the sealing member abutting against the second plate.

[0006] Optionally, the welding positions of the first plate and the second plate are spaced apart from the sealing element.

[0007] Optionally, the first plate has a first groove on the side near the second plate, and the inner wall of the first groove and the second plate define the installation space; and / or, the second plate has a second groove on the side near the first plate, and the inner wall of the second groove and the first plate define the installation space.

[0008] Optionally, the insulating film is adhered to the inner wall of the connection portion or the mounting space.

[0009] Optionally, the insulating film is bonded to the inner wall of the connection or the mounting space by a thermosetting adhesive layer.

[0010] Optionally, the insulating film is a PEEK film or a PI film.

[0011] Optionally, the thickness of the insulating film is 0.015 mm to 0.03 mm.

[0012] Optionally, the outer peripheral surface of the seal abuts against the inner wall surface of the mounting space.

[0013] Optionally, the second plate has explosion-proof grooves on one side in its thickness direction, and the explosion-proof grooves are offset from the position of the first plate.

[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 the insulating film on both sides of the terminal post as the insulating structure of the battery cover. This insulating film can be designed to be thinner, which is beneficial to reducing the overall thickness of the battery cover compared with the existing rubber-coated structure, thus facilitating the lightweight design of micro batteries. By setting a sealing element on the outer periphery of the terminal post connection, a good sealing effect can be achieved, and the sealing element does not increase the overall thickness of the battery cover. Compared with the rubber-coated structure, it not only helps to reduce the overall thickness of the battery cover but also ensures the reliability of the seal. In addition, the battery cover of this utility model fixes the terminal post connection and the insulating film by welding the first plate to the second plate and forming an installation space between the first plate and the second plate. Compared with hot-press bonding, there is no need to passivate the parts, thus significantly enhancing the reliability of the battery cover connection and the reliability of the seal, and facilitating manufacturing. Furthermore, the battery cover of this utility model does not require an additional riveting structure, significantly reducing the overall thickness of the battery cover, which is beneficial to the lightweight design of micro batteries and can increase the battery capacity within the same volume.

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

[0019] Figure 2 This is an enlarged view of a portion of the structure of a battery cover according to an embodiment of the present invention;

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

[0021] Figure Labels

[0022] 100. Battery cover;

[0023] 101, 10, Cover plate body; 11, First plate; 12, Second plate; 121, Explosion-proof groove; 20, Pole post; 21, Main body; 22, Connecting part; 30, Insulating film; 40, Sealing element;

[0024] 200. Battery. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1 and Figure 2 As shown, the battery cover 100 according to an embodiment of the present utility model includes: a first plate 11, a second plate 12, an electrode post 20, an insulating film 30, and a sealing member 40.

[0032] Specifically, the first plate 11 is welded to one side of the second plate 12 in the thickness direction, and an installation space is formed between the first plate 11 and the second plate 12; the pole post 20 includes a main body 21 and a connecting part 22, the connecting part 22 is disposed on the outer periphery of the main body 21, the connecting part 22 is disposed in the installation space, and the main body 21 is spaced apart from the first plate 11 and the second plate 12; the connecting part 22 is provided with the insulating film 30 on both sides in the thickness direction between itself and the inner wall surface of the installation space, and the connecting part 22 and the insulating film 30 are clamped and fixed by the first plate 11 and the second plate 12; the sealing member 40 is disposed on the outer periphery of the pole post 20, the first end of the sealing member 40 abuts against the first plate 11, and the second end of the sealing member 40 abuts against the second plate 12.

[0033] In other words, such as Figure 1 and Figure 2 As shown, the battery cover 100 according to an embodiment of the present invention is mainly used in micro batteries. The battery cover 100 mainly includes a cover body 10 and an electrode post 20. The cover body 10 mainly includes a first plate 11 and a second plate 12. Both the first plate 11 and the second plate 12 can be made of steel sheet. The first plate 11 is welded to one side (e.g., the upper side) of the second plate 12 in its thickness direction, and an installation space is defined between the first plate 11 and the second plate 12. The electrode post 20 includes an integrally formed main body 21 and a connecting part 22. The main body 21 is formed into a cylindrical structure, and the connecting part 22 surrounds the outer periphery of the main body 21. The first plate 11 has a first through hole corresponding to the main body 21, and the second plate 12 has a second through hole corresponding to the main body 21. The inner wall surfaces of the main body 21, the first through hole, and the second through hole are spaced apart.

[0034] A portion of the connecting part 22 is located in the mounting space, and the outer periphery of the connecting part 22 is spaced apart from the inner wall of the mounting space. The connecting part 22 has a first side and a second side arranged opposite to each other in its thickness direction. An insulating film 30 is provided between the first side of the connecting part 22 and the inner wall of the mounting space (i.e., the first plate 11), which can separate the connecting part 22 from the first plate 11. Similarly, an insulating film 30 is provided between the second side of the connecting part 22 and the inner wall of the mounting space (i.e., the second plate 12), which can separate the connecting part 22 from the second plate 12. Thus, the insulation between the terminal post 20 and the cover plate body 10 can be achieved by the insulating films 30 provided on both sides of the connecting part 22. The insulating film 30 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 encapsulation structure, which is conducive to the lightweight design of the battery cover plate 100.

[0035] The connecting portion 22 of the terminal post 20 and the insulating film 30 are clamped and fixed in the installation space by the first plate 11 and the second plate 12. A sealing element 40, which can be a rubber ring, is fitted around the outer periphery of the connecting portion 22. The first end of the sealing element 40 abuts against the first plate 11, and the second end abuts against the second plate 12, thereby achieving a reliable seal between the terminal post 20 and the cover plate body 10. This sealing element 40 does not occupy space in the thickness direction of the battery cover plate 100, thus not increasing the overall thickness of the battery cover plate 100, and still provides a reliable seal. During use, even if the electrolyte passes through the insulating film 30 inside the battery cover plate 100, the sealing element 40 can still provide a good seal.

[0036] Therefore, according to the battery cover 100 provided in this embodiment, the insulating film 30 on both sides of the terminal post 20 is used as the insulating structure of the battery cover 100. The insulating film 30 can be designed to be thinner, which is beneficial to reducing the overall thickness of the battery cover 100 compared with the existing rubber-coated structure, and thus is beneficial to the lightweight design of the micro battery; by providing a sealing element 40 on the outer periphery of the connection portion 22 of the terminal post 20, a good sealing effect can be achieved, and the provided sealing element 40 does not increase the overall thickness of the battery cover 100. Compared with the rubber-coated 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, this The battery cover 100 of the utility model fixes the connecting part 22 of the terminal post 20 and the insulating film 30 by welding the first plate 11 to the second plate 12 and forming an installation space between the first plate 11 and the second plate 12. Compared with hot pressing bonding, 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, and it is also easy to manufacture. Furthermore, the battery cover 100 of this utility model does not require additional riveting structure, which significantly reduces the overall thickness of the battery cover 100, which is conducive to the lightweight design of micro batteries, and can increase the capacity of the battery 200 in the same volume.

[0037] According to one embodiment of the present invention, the welding positions of the first plate 11 and the second plate 12 are spaced apart from the sealing element 40.

[0038] In this embodiment, the welding positions of the first plate 11 and the second plate 12 are spaced apart from the sealing element 40 in the radial direction of the pole post 20. This can effectively avoid damage to the sealing element 40 when the first plate 11 and the second plate 12 are welded, thereby ensuring the sealing performance of the battery cover 100 and guaranteeing the safety of the battery 200.

[0039] In some specific embodiments of this utility model, the first plate 11 is provided with a first groove on the side near the second plate 12, and the inner wall of the first groove and the second plate 12 define the installation space.

[0040] In some optional examples of this utility model, the second plate 12 is provided with a second groove on the side near the first plate 11, and the inner wall of the second groove and the first plate 11 define the installation space.

[0041] Specifically, the formation of installation space includes the following situations:

[0042] Case 1: The first plate 11 is provided with a first groove on the side (i.e., the lower side) near the second plate 12, and the inner wall of the first groove and the upper surface of the second plate 12 define the installation space.

[0043] Case 2: The second plate 12 is provided with a second groove on the side (i.e., the upper side) close to the first plate 11, and the inner wall of the second groove and the lower surface of the first plate 11 define the installation space.

[0044] Case 3: The lower side of the first plate 11 is provided with a first groove, and the upper side of the second plate 12 is provided with a second groove. The inner wall of the first groove and the inner wall of the second groove define the installation space.

[0045] In this embodiment, the first groove can define the relative positions of the pole post 20 and the seal 40 with the first plate 11, and the second groove can define the relative positions of the pole post 20 and the seal 40 with the second plate 12, thereby making the assembly operation in the production process more convenient and effectively improving production efficiency.

[0046] According to one embodiment of the present invention, the insulating film 30 is adhered to the connecting portion 22 or the inner wall surface of the mounting space.

[0047] In other words, when assembling the battery cover 100, the insulating film 30 can be bonded to the connecting part 22 or the corresponding first plate 11 or second plate 12, thereby preventing the insulating film 30 from shifting during assembly, making assembly more convenient, reducing assembly difficulty, and improving the assembly efficiency of the battery cover 100. At the same time, the above-mentioned bonding method can also effectively block electrolyte and prevent electrolyte penetration.

[0048] In some specific embodiments of this utility model, the insulating film 30 is bonded to the connecting part 22 or the inner wall surface of the installation space by a thermosetting adhesive layer.

[0049] Specifically, when assembling the battery cover 100, thermosetting adhesive can be applied to one side of the insulating film 30, and then the insulating film 30 can be bonded to the inner wall of the connection part 22 or the mounting space 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 the use of the battery 200, thereby ensuring that the insulating film 30 is firmly and reliably fixed to the inner wall of the connection part 22 or the mounting space.

[0050] According to one embodiment of the present invention, the insulating film 30 is a PEEK film or a PI film.

[0051] In other words, the insulating film 30 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, the 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 200 use, thus ensuring the reliability of the insulating film 30. Simultaneously, the PEEK film also possesses inherent flame retardancy, effectively improving the safety of the battery 200.

[0052] The insulating film 30 can also be configured as a PI (polyimide) film. PI films have excellent electrical insulation and mechanical properties, allowing the insulating film 30 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 the use of the battery 200, thus ensuring the reliability of the insulating film 30.

[0053] In some specific embodiments of this utility model, the thickness of the insulating film 30 is 0.015mm to 0.03mm.

[0054] In this embodiment, the insulating film 30 can be a PEEK film or a PI 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.

[0055] According to one embodiment of the present invention, the outer peripheral surface of the sealing member 40 abuts against the inner wall surface of the installation space.

[0056] In other words, in the radial direction of the pole post 20, the sealing element 40 is pressed by the connecting part 22 of the pole post 20 and the inner wall surface of the installation space, the inner circumferential surface of the sealing element 40 abuts against the outer circumferential surface of the connecting part 22, and the outer circumferential surface of the sealing element 40 abuts against the inner wall surface of the installation space, thereby forming multiple seals between the connecting part 22 of the pole post 20 and the inner wall surface of the installation space, effectively improving the sealing performance.

[0057] In some specific embodiments of this utility model, the second plate 12 is provided with an explosion-proof groove 121 on one side of its thickness direction, and the explosion-proof groove 121 is offset from the position of the first plate 11.

[0058] In this embodiment, the battery cover 100 can burst and release pressure from the explosion-proof notch 13, thus eliminating the need for an additional explosion-proof valve and effectively simplifying the structure of the battery cover 100.

[0059] In summary, according to the battery cover 100 provided in this embodiment, the insulating film 30 on both sides of the terminal post 20 serves as the insulating structure of the battery cover 100. This insulating film 30 can be designed to be thinner, which, compared to existing encapsulation structures, helps reduce the overall thickness of the battery cover 100, thus facilitating the lightweight design of micro-batteries. By providing a sealing element 40 around the outer periphery of the connection portion 22 of the terminal post 20, a good sealing effect can be achieved, and the sealing element 40 does not increase the overall thickness of the battery cover 100. Compared to encapsulation structures, this not only helps reduce the overall thickness of the battery cover 100 but also ensures the reliability of the seal. Furthermore, The battery cover 100 of this utility model fixes the connecting part 22 of the terminal post 20 and the insulating film 30 by welding the first plate 11 to the second plate 12 and forming an installation space between the first plate 11 and the second plate 12. Compared with hot pressing bonding, 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, and it is also easy to manufacture. Furthermore, the battery cover 100 of this utility model does not require additional riveting structure, which significantly reduces the overall thickness of the battery cover 100, which is conducive to the lightweight design of micro batteries, and can increase the capacity of the battery 200 in the same volume.

[0060] like Figure 3 As shown, an embodiment of the present invention also provides a battery 200, which can be a micro battery, and the battery 200 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 200 according to the embodiments of the present invention also has corresponding technical effects, which will not be described again in this embodiment.

[0061] 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.

[0062] 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: A first plate (11) and a second plate (12), wherein the first plate (11) is welded to one side of the second plate (12) in the thickness direction, and an installation space is formed between the first plate (11) and the second plate (12); The pole post (20) includes a main body (21) and a connecting part (22). The connecting part (22) is disposed on the outer periphery of the main body (21) and in the installation space. The main body (21) is spaced apart from the first plate (11) and the second plate (12). An insulating film (30) is provided on both sides of the connecting part (22) in the thickness direction between the insulating film (30) and the inner wall surface of the mounting space. The connecting part (22) and the insulating film (30) are clamped and fixed by the first plate (11) and the second plate (12). A sealing element (40) is sleeved on the outer periphery of the pole post (20). The first end of the sealing element (40) abuts against the first plate (11), and the second end of the sealing element (40) abuts against the second plate (12).

2. The battery cover plate of claim 1, wherein, The welding positions of the first plate (11) and the second plate (12) are spaced apart from the sealing element (40).

3. The battery cover plate of claim 1, wherein, The first plate (11) has a first groove on the side near the second plate (12), and the inner wall of the first groove and the second plate (12) define the installation space. And / or, the second plate (12) is provided with a second groove on the side near the first plate (11), and the inner wall of the second groove and the first plate (11) define the installation space.

4. The battery cover plate of claim 1, wherein, The insulating film (30) is adhered to the connecting part (22) or the inner wall surface of the mounting space.

5. The battery cover plate of claim 1, wherein, The insulating film (30) is bonded to the connection part (22) or the inner wall of the installation space by a thermosetting adhesive layer.

6. The battery cover plate of claim 1, wherein, The insulating film (30) is a PEEK film or a PI film.

7. The battery cover plate of claim 6, wherein, The thickness of the insulating film (30) is 0.015 mm to 0.03 mm.

8. The battery cover plate of claim 1, wherein, The outer peripheral surface of the seal (40) abuts against the inner wall surface of the mounting space.

9. The battery cover plate of claim 1, wherein, The second plate (12) has an explosion-proof groove (121) on one side of its thickness direction, and the explosion-proof groove (121) is offset from the position of the first plate (11).

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

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