Cap assembly, battery and electronic device

Abstract

The application discloses a cap assembly, a battery and an electronic device. The cap assembly comprises a first cover plate, a second cover plate and a pole, a first part of the first cover plate and a first part of the second cover plate are connected to each other, and a second part of the first cover plate and a second part of the second cover plate are spaced apart; the pole is clamped between the second part of the first cover plate and the second part of the second cover plate, and the pole is insulated from the first cover plate and the second cover plate. In the cap assembly provided in the embodiment of the application, the functions of fixing, insulating and sealing of the pole are integrated in the double-layer cover plate structure composed of the first cover plate and the second cover plate, so that the sealing and processing of the cap assembly are easier, and the stability and safety of the battery are significantly improved.

Description

Technical Field

[0001] This application relates to the field of energy storage device technology, and more specifically, to a cap assembly, battery, and electronic device. Background Technology

[0002] In recent years, with the development of technology, various electronic products have entered thousands of households and become necessities of life. As the power source of electronic products, the performance of batteries is one of the important indicators for measuring the quality of electronic products.

[0003] For example, fully sealed batteries are widely used in many fields due to their unique sealing and safety features; a fully sealed battery is a sealed battery without a pressure relief device. The design feature of this type of battery is its completely sealed structure, which prevents leakage of internal materials and intrusion of external impurities, thereby improving the battery's safety and stability.

[0004] In fully sealed batteries, the cap assembly is a key component. It not only seals the opening of the battery casing but also ensures electrical isolation between the battery's interior and external environment, while providing a reliable lead-out structure for the battery electrodes. However, the structure of the cap assembly in existing fully sealed batteries still has room for improvement; for example, the connection between the terminals and the cover plate is not robust enough, and it is prone to loosening or displacement when the battery is subjected to external forces such as vibration or impact, thus affecting the battery's performance and sealing.

[0005] In view of this, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Utility Model Content

[0006] One objective of this application is to provide a new technical solution for a cap assembly, a battery, and an electronic device.

[0007] According to a first aspect of this application, a cap assembly is provided, the cap assembly comprising:

[0008] A first cover plate and a second cover plate, wherein a first part of the first cover plate and a first part of the second cover plate are connected to each other, and a second part of the first cover plate and a second part of the second cover plate are spaced apart;

[0009] The electrode post is sandwiched between the second part of the first cover plate and the second part of the second cover plate, and the electrode post is insulated from both the first cover plate and the second cover plate.

[0010] Optionally, the first cover plate includes a first central portion and a first edge portion connected to each other, the first edge portion being disposed around the first central portion; the second cover plate includes a second central portion and a second edge portion connected to each other, the second edge portion being disposed around the second central portion;

[0011] The first edge portion and the second edge portion are fitted together, and the first center portion and the second center portion are spaced apart; the pole post is sandwiched between the first center portion and the second center portion.

[0012] Optionally, the first central portion has a first through hole, and the second central portion has a second through hole; one side of the pole post is exposed through the first through hole, and the other side of the pole post is exposed through the second through hole.

[0013] Optionally, the pole post includes a third central portion and a third edge portion connected to each other, the third edge portion being disposed around the third central portion; the third edge portion is at least partially sandwiched between the first central portion and the second central portion, one side of the third central portion is exposed through the first through hole, and the other side of the third central portion is exposed through the second through hole.

[0014] Optionally, the thickness of the third central portion is greater than the thickness of the third edge portion.

[0015] Optionally, the first central portion and the first edge portion are bent and connected, and the second central portion and the second edge portion are bent and connected.

[0016] Optionally, the cap assembly further includes a first insulating layer and a second insulating layer, both of which are connected to the pole post; and the first insulating layer is disposed between the first cover plate and the pole post, and the second insulating layer is disposed between the second cover plate and the pole post.

[0017] Optionally, the cap assembly further includes a sealing ring that is fitted over the outside of the pole post.

[0018] According to a second aspect of this application, a battery is provided, the battery including a cap assembly as described in the first aspect, and a housing having an opening, the cap assembly being connected to the housing and covering the opening; the terminal post being configured as a first terminal of the battery, and the housing being configured as a second terminal of the battery.

[0019] According to a third aspect of this application, an electronic device is provided, the electronic device comprising a battery as described in the second aspect.

[0020] In the cap assembly provided in this application embodiment, the functions of fixing, insulating and sealing the terminal post are integrated into the double-layer cap structure composed of the first cap plate and the second cap plate, which makes the sealing and processing of the cap assembly easier; and significantly improves the stability and safety of the battery.

[0021] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0023] Figure 1a This is a schematic diagram of the overall structure of a cap assembly according to an embodiment of this application;

[0024] Figure 1b This is an exploded structural diagram of a cap assembly according to an embodiment of this application;

[0025] Figure 2 This is a cross-sectional structural diagram of a battery according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Cap assembly; 11. First cover plate; 111. First center portion; 112. First edge portion; 110. First through hole; 12. Second cover plate; 121. Second center portion; 122. Second edge portion; 120. Second through hole; 13. Pole post; 131. Third center portion; 132. Third edge portion; 14. First insulating layer; 15. Second insulating layer; 16. Sealing ring;

[0028] 2. Outer shell; 3. Core. Detailed Implementation

[0029] Various exemplary embodiments of the present application 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 application.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Reference Figures 1a-1b As shown, according to one embodiment of this application, a cap assembly 1 is provided. The cap assembly 1 includes a first cover plate 11, a second cover plate 12 and a pole post 13. A first part of the first cover plate 11 and a first part of the second cover plate 12 are connected to each other, and a second part of the first cover plate 11 and a second part of the second cover plate 12 are spaced apart.

[0035] The pole post 13 is sandwiched between the second part of the first cover plate 11 and the second part of the second cover plate 12, and the pole post 13 is insulated from both the first cover plate 11 and the second cover plate 12.

[0036] The cap assembly 1 provided in this application embodiment includes a cover plate and a terminal post 13. The cover plate is composed of a first cover plate 11 and a second cover plate 12. Specifically, the first portions of the first cover plate 11 and the second cover plate 12 are connected to each other, and the second portions are spaced apart. The terminal post 13 is sandwiched between the second portions of the first cover plate 11 and the second cover plate 12 and is insulated from both. In the cap assembly 1 provided in this application embodiment, the space for clamping the terminal post 13 is formed by the spaced arrangement of the first cover plate 11 and the second cover plate 12, which simplifies the installation structure of the terminal post 13 and eliminates the need for additional fixing components. The insulation between the terminal post 13 and the first cover plate 11 and the second cover plate 12 avoids the risk of internal short circuits in the battery and improves safety. The partially connected and partially spaced cover plate structure allows the terminal post 13 to be independently encapsulated, facilitating sealing and insulation treatment. The sealing and processing of this cap assembly 1 are easier.

[0037] Furthermore, the terminal post 13 is sandwiched in the space formed by the first cover plate 11 and the second cover plate 12, thereby forming a stable connection between the terminal post 13 and the cover plate, ensuring that the terminal post 13 and the cover plate are not prone to loosening or displacement, thus ensuring the reliability and stability of battery performance.

[0038] The cap assembly 1 provided in this application integrates the functions of fixing, insulating and sealing the terminal post into a double-layer cover structure, which significantly improves the stability, safety and production efficiency of the battery, while reducing the assembly complexity.

[0039] Reference Figures 1a-1bAs shown, in one embodiment, the first cover plate 11 includes a first central portion 111 and a first edge portion 112 connected to each other, the first edge portion 112 being disposed around the first central portion 111; the second cover plate 12 includes a second central portion 121 and a second edge portion 122 connected to each other, the second edge portion 122 being disposed around the second central portion 121.

[0040] The first edge portion 112 and the second edge portion 122 are fitted together, and the first center portion 111 and the second center portion 121 are spaced apart; the pole post 13 is sandwiched between the first center portion 111 and the second center portion 121.

[0041] In this specific example, the first cover plate 11 is specifically composed of a first central portion 111 and a first edge portion 112 surrounding the first central portion 111, and the second cover plate 12 is specifically composed of a second central portion 121 and a second edge portion 122 surrounding the second central portion 121; wherein, the first edge portion 112 and the second edge portion 122 are fitted together, and the pole post 13 is sandwiched in the space formed between the first central portion 111 and the second central portion 121; the first cover plate 11 and the second cover plate 12 are configured as a partitioned structure of central portion and edge portion, and the edge portion is fitted together and the central portion is spaced apart, thereby optimizing the structural strength of the cover plate; the fitted connection of the first edge portion 112 and the second edge portion 122 provides overall stability; the spaced arrangement of the first central portion 111 and the second central portion 121 ensures the accommodation space of the pole post 13; the pole post 13 is sandwiched between the two central portions, thereby making the positioning more accurate, avoiding assembly misalignment, and dispersing the mechanical stress of the pole post.

[0042] Reference Figures 1a-1b As shown, in one embodiment, the first central portion 111 has a first through hole 110, and the second central portion 121 has a second through hole 120; one side of the pole post 13 is exposed through the first through hole 110, and the other side of the pole post 13 is exposed through the second through hole 120.

[0043] In this specific example, the first central portion 111 and the second central portion 121 are respectively provided with through holes, through which both sides of the terminal post 13 are exposed; this allows the terminal post 13 to be electrically connected to the inside and outside of the battery, realizing the charging and discharging function of the battery. In addition, the positions of the first through hole 110 and the second through hole 120 are aligned with the terminal post 13, thereby facilitating the positioning and installation of the terminal post during battery assembly, reducing assembly errors, and improving production consistency.

[0044] Reference Figures 1a-1bAs shown, in one embodiment, the pole post 13 includes a third central portion 131 and a third edge portion 132 connected to each other, the third edge portion 132 being disposed around the third central portion 131; the third edge portion 132 is at least partially sandwiched between the first central portion 111 and the second central portion 121, one side of the third central portion 131 is exposed through the first through hole 110, and the other side of the third central portion 131 is exposed through the second through hole 120.

[0045] In this specific example, the terminal 13 consists of a third central portion 131 and a third edge portion 132 surrounding the third central portion 131; wherein, the third edge portion 132 is at least partially sandwiched between the first central portion 111 and the second central portion 121, and both sides of the third central portion 131 are exposed through the first through hole 110 and the second through hole 120. The third edge portion 132 sandwiched between the first central portion 111 and the second central portion 121 can enhance the connection stability between the terminal 13 and the cover plate, prevent the terminal 13 from loosening or shifting, and ensure the reliability and safety of the battery during use; at the same time, the exposed third central portion 131 facilitates the realization of electrical connection function.

[0046] Reference Figures 1a-1b As shown, in one embodiment, the thickness of the third central portion 131 is greater than the thickness of the third edge portion 132.

[0047] In this specific example, the thickness of the third central portion 131 is greater than the thickness of the third edge portion 132. This ensures that the terminal post 13, while maintaining stable connection with the cover plate, has sufficient thickness in its central portion to carry current, reduce resistance, decrease energy loss, and improve the battery's charging and discharging efficiency. Furthermore, the thicker central portion also helps to improve the mechanical strength of the terminal post 13, making it less prone to damage during battery use and extending the battery's lifespan. In short, thickening the center of the terminal post 13 increases its current-carrying capacity (increases the cross-sectional area), while thinning the edges reduces weight and adapts to the clamping space.

[0048] Optionally, the third edge portion 132 is located in the middle of the thickness direction of the third center portion 131, so that the shape of the pole post 13 is more regular and easier to manufacture and assemble.

[0049] Reference Figures 1a-1b As shown, in one embodiment, the first central portion 111 and the first edge portion 112 are bent and connected, and the second central portion 121 and the second edge portion 122 are bent and connected.

[0050] In this specific example, the first central portion 111 and the first edge portion 112, as well as the second central portion 121 and the second edge portion 122, are all bent connections. Bending connections increase the structural strength of the cover plate, and the bends create a natural transition, optimizing stress distribution and enabling it to better withstand internal battery pressure and external impacts, thus improving the reliability and safety of the cover assembly 1. Simultaneously, the bending structure also helps improve the sealing performance of the cover plate, preventing electrolyte leakage and ensuring normal battery operation.

[0051] Furthermore, the first cover plate 11, the second cover plate 12, and the pole post 13 are all integral structures, which facilitates processing and forming, and makes the structure more reliable and stable.

[0052] Reference Figures 1a-1b As shown, in one embodiment, the cap assembly further includes a first insulating layer 14 and a second insulating layer 15, both of which are connected to the pole post 13; and the first insulating layer 14 is disposed between the first cover plate 11 and the pole post 13, and the second insulating layer 15 is disposed between the second cover plate 12 and the pole post 13.

[0053] In this specific example, the first insulating layer 14 and the second insulating layer 15 are respectively disposed between the first cover plate 11 and the terminal post 13 and between the second cover plate 12 and the terminal post 13. The insulating layer can effectively prevent short circuits between the terminal post and the cover plate, ensuring the electrical safety of the battery. At the same time, the insulating layer can also play a buffering role, reducing friction and wear between the terminal post and the cover plate, and extending the service life of the cap assembly 1. In addition, the insulating layer helps to improve the sealing performance of the cap assembly 1 and prevent external impurities from entering the battery.

[0054] Reference Figures 1a-1b As shown, in one embodiment, the cap assembly further includes a sealing ring 16, which is fitted over the outside of the pole post 13.

[0055] In this specific example, the sealing ring 16 further enhances the sealing performance of the cap assembly 1, effectively preventing electrolyte leakage inside the battery and the entry of external moisture, dust, etc. into the battery, ensuring a stable internal chemical environment and improving battery performance and safety. In addition, the sealing ring 16 is made of insulating material, which isolates the terminal 13 from the cover plate from the outer periphery of the terminal 13, further ensuring the insulation between the terminal 13 and the cover plate. At the same time, the sealing ring 16 can also act as a buffer, reducing the relative movement between the terminal and the cover plate and improving the stability of the cap assembly 1.

[0056] The cap assembly 1 is sealed by the sealing ring 16 pressing against the first cover plate 11 and the second cover plate 12; the first insulating layer 14 and the second insulating layer 15 are insulating adhesive paper or other molded insulating films; the first cover plate 11 and the second cover plate 12 do not need to be connected to the pole post 13 by a hot melt insulating layer bonding process; the sealing and processing of the cap assembly 1 are easier.

[0057] Reference Figure 2 As shown, according to another embodiment of this application, a battery is provided, the battery including a cap assembly 1 as described above, and a housing 2 having an opening, the cap assembly 1 being connected to the housing 2 and the cap assembly 1 covering the opening; the terminal post 13 is configured as the first terminal of the battery, and the housing 2 is configured as the second terminal of the battery.

[0058] Furthermore, the outer casing 2 has a closed end and an opening disposed opposite to each other; the cap assembly 1 covers the opening, wherein the length of the first edge portion 112 is greater than the length of the second edge portion 122, and the first edge portion 112 is welded to the outer casing 2 at the opening. The cap assembly 1 and the outer casing 2 enclose a receiving space, and the core 3 is disposed within the receiving space; the second cover plate 12 is entirely located within the receiving space, and to further improve insulation stability, an insulating layer is also provided on the surface of the second center portion 121 facing the receiving space. The first tab leading from the core 3 is connected to the third center portion 131 of the pole post 13, and the second tab leading from the core 3 is connected to the inner bottom surface of the outer casing 2.

[0059] The battery provided in this application embodiment has good sealing, insulation and stability because it includes the above-mentioned cap assembly 1.

[0060] According to another embodiment of this application, an electronic device is provided, the electronic device including the battery as described above.

[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] While specific embodiments of this application 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 this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A cap assembly, characterized in that, The cap assembly includes: A first cover plate (11) and a second cover plate (12), wherein a first part of the first cover plate (11) and a first part of the second cover plate (12) are connected to each other, and a second part of the first cover plate (11) and a second part of the second cover plate (12) are spaced apart; The pole (13) is sandwiched between the second part of the first cover plate (11) and the second part of the second cover plate (12), and the pole (13) is insulated from both the first cover plate (11) and the second cover plate (12).

2. The cap assembly according to claim 1, characterized in that, The first cover plate (11) includes a first central portion (111) and a first edge portion (112) connected to each other, the first edge portion (112) being disposed around the first central portion (111); the second cover plate (12) includes a second central portion (121) and a second edge portion (122) connected to each other, the second edge portion (122) being disposed around the second central portion (121); The first edge portion (112) and the second edge portion (122) are fitted together, and the first center portion (111) and the second center portion (121) are spaced apart; the pole post (13) is sandwiched between the first center portion (111) and the second center portion (121).

3. The cap assembly according to claim 2, characterized in that, The first central portion (111) has a first through hole (110), and the second central portion (121) has a second through hole (120); one side of the pole post (13) is exposed through the first through hole (110), and the other side of the pole post (13) is exposed through the second through hole (120).

4. The cap assembly according to claim 3, characterized in that, The pole post (13) includes a third central portion (131) and a third edge portion (132) connected to each other, the third edge portion (132) being disposed around the third central portion (131); the third edge portion (132) is at least partially sandwiched between the first central portion (111) and the second central portion (121), one side of the third central portion (131) is exposed through the first through hole (110), and the other side of the third central portion (131) is exposed through the second through hole (120).

5. The cap assembly according to claim 4, characterized in that, The thickness of the third central portion (131) is greater than the thickness of the third edge portion (132).

6. The cap assembly according to claim 2, characterized in that, The first central portion (111) and the first edge portion (112) are bent and connected, and the second central portion (121) and the second edge portion (122) are bent and connected.

7. The cap assembly according to claim 1, characterized in that, The cap assembly further includes a first insulating layer (14) and a second insulating layer (15), both of which are connected to the pole post (13); and the first insulating layer (14) is disposed between the first cover plate (11) and the pole post (13), and the second insulating layer (15) is disposed between the second cover plate (12) and the pole post (13).

8. The cap assembly according to claim 1, characterized in that, The cap assembly also includes a sealing ring (16) which is fitted over the outside of the pole post (13).

9. A battery, characterized in that, The battery includes a cap assembly (1) as described in any one of claims 1-8, and a housing (2) having an opening, the cap assembly (1) being connected to the housing (2) and the cap assembly (1) covering the opening; the terminal post (13) is configured as a first terminal of the battery, and the housing (2) is configured as a second terminal of the battery.

10. An electronic device, characterized in that, The electronic device includes the battery as described in claim 9.

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