Cap assembly, battery and electronic equipment

Abstract

The embodiment of the utility model provides a cap assembly, a battery and electronic equipment. The cap assembly comprises: a cover plate having an outer surface deviating from the interior of the battery, the outer surface being partially recessed to form a recessed area and a non-recessed area on the cover plate, the recessed area and the non-recessed area having a height difference; the cover plate is provided with a first electrode leading-out part in the non-concave area, and the first electrode leading-out part is isolated from the cover plate; the cover plate is provided with a liquid injection hole, the liquid injection hole is arranged close to the edge of the concave area, or the liquid injection hole is arranged in the non-concave area of the cover plate.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of batteries, and more particularly, to a cap assembly, a battery, and an electronic device. BACKGROUND

[0002] Current cap assembly designs lack sufficient reserved space on the cover plate, which limits the possibility of more efficient and optimized pack processing. In order to improve overall performance and convenience, an innovative design is needed to create more available space on the cover plate for the cap assembly, thereby allowing for more refined assembly and configuration. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a new technical solution for a cap assembly, a battery, and an electronic device.

[0004] In a first aspect, the present application provides a cap assembly. The cap assembly comprises: a cover plate having an outer surface facing away from the inside of a battery, the outer surface being partially recessed so that the cover plate forms a recessed area and a non-recessed area, the recessed area and the non-recessed area having a height difference;

[0005] The cover plate is provided with a first electrode lead-out portion in the non-recessed area, and the first electrode lead-out portion is isolated from the cover plate.

[0006] The cover plate is provided with a liquid injection hole, and the liquid injection hole is arranged near the edge of the recessed area, or the liquid injection hole is arranged in the non-recessed area of the cover plate.

[0007] Optionally, the area occupied by the recessed area is greater than the area occupied by the non-recessed area.

[0008] Optionally, the recessed area extends to the edge of the cover plate in the length direction of the cap assembly, and the recessed area extends to the edge of the cover plate in the width direction of the cap assembly.

[0009] Optionally, the recessed area is configured to arrange functional components, and the functional components include at least one of an electronic chip, a metal sheet, an elastic component, and a sensor.

[0010] Optionally, the cap assembly further comprises a plugging portion arranged in the liquid injection hole.

[0011] Optionally, in the case where the liquid injection hole is arranged in the recessed area of the cover plate, the plugging portion does not protrude from the surface of the recessed area.

[0012] Optionally, the cap assembly further comprises a sealing component, and the sealing component is sleeved outside the first electrode lead-out portion to isolate the first electrode lead-out portion and the cover plate.

[0013] The sealing component is provided with a fitting part embedded in the cover plate.

[0014] Optionally, the first electrode lead-out part comprises a rivet part and a rivet sheet, the rivet sheet is sleeved outside the rivet part and is located below the sealing component and abuts against the sealing component.

[0015] Optionally, the cap assembly further comprises an insulating component, the insulating component is sleeved outside the rivet part and is located below the rivet sheet.

[0016] In a second aspect, the embodiments of the present application further provide a battery. The battery comprises:

[0017] The shell and the cap assembly as described in the first aspect, the cover plate is welded with the shell;

[0018] The cell comprises a first tab and a second tab, the first tab is connected with the first electrode lead-out part, and the second tab is connected with the cover plate.

[0019] Optionally, the battery is a square battery.

[0020] In a third aspect, the embodiments of the present application provide an electronic device. The electronic device comprises the battery as described in the second aspect.

[0021] According to the embodiments of the present application, a cap assembly is provided, by improving the cover plate structure in the cap assembly, and reasonably arranging the design position of the first electrode lead-out part and the liquid injection hole, more space formed by the recessed area can be used to set functional components, the maximization utilization of the recessed area space is realized, in addition, the functional components can be set in the recessed area, the packaging of the cap assembly is realized without increasing the overall volume of the battery, and the overall performance and space utilization efficiency of the battery are improved.

[0022] Other characteristics and advantages of the present application will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, illustrating by way of example the various embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 A battery structure provided by the embodiments of the present application is shown.

[0025] Figure 2 A cross-sectional view of the battery structure provided by the embodiments of the present application is shown.

[0026] Figure 3 A battery structure provided by an embodiment of the present application is shown in the exploded view Figure 1

[0027] Figure 4 A battery structure provided by an embodiment of the present application is shown in the exploded view Figure 2

[0028] Figure 5 A structure diagram of a battery cell provided by an embodiment of the present application is shown.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, cover plate; 11, recessed area; 12, non-recessed area; 13, liquid injection hole; 121, through hole; 2, first electrode lead-out part; 21, rivet part; 22, rivet piece; 3, functional part; 4, plugging part; 5, sealing part; 51, fitting part; 6, insulating part; 7, shell; 8, battery cell; 81, first tab; 82, second tab; 83, insulating adhesive paper; 84, insulating gasket. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, numerical expressions, and numerical values are not limiting to the scope of the present application unless specifically stated otherwise.

[0032] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0033] Techniques and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification where appropriate.

[0034] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0035] It should be noted that like numbers and letters refer to like items throughout the drawings, and that once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0036] ​​The first aspect of the embodiments of the present application provides a cap assembly, mainly improving the structure of the cover plate 1 of the cap assembly, so that the functional components 3 can be integrated in the recessed area 11 formed by the cover plate 1, so that the pack layout of the battery is more reasonable. Exemplarily, the surface of the cover plate 1 of the cap assembly is recessed, and the functional components 3 for packing the battery are arranged in the recessed area 11, so that the thickness size of the cap assembly is increased due to the arrangement of the functional components 3, and the occupied space of the battery during installation is reduced.

[0037] Referring to Figures 1-4 The cap assembly comprises a cover plate 1 having an outer surface facing away from the inside of the battery, the outer surface is partially recessed to form a recessed area 11 and a non-recessed area 12 on the cover plate 1, and the recessed area and the non-recessed area have a height difference;

[0038] The cover plate 1 is provided with a first electrode lead-out portion 2 in the non-recessed area 12, and the first electrode lead-out portion 2 is isolated from the cover plate 1;

[0039] The cover plate 1 is provided with a liquid injection hole 13, and the liquid injection hole 13 is arranged near the edge of the recessed area 11, or the liquid injection hole 13 is arranged in the non-recessed area 12 of the cover plate 1.

[0040] In the embodiments of the present application, the cap assembly mainly comprises a cover plate 1, and the cap assembly is applied to a battery. The cover plate 1 has an outer surface facing away from the inside of the battery. The outer surface is designed to be partially recessed to form a recessed area 11 and a non-recessed area 12. The recessed area 11 is lower in height than the non-recessed area 12. This design not only increases the surface area of the cover plate 1, but also provides space for the integration of functional components 3, improving the flexibility of the design. Exemplarily, the functional components 3 can be integrated in the recessed area 11, without increasing the thickness size of the cap assembly.

[0041] The existing cover plate design generally adopts a flat surface structure. This design inevitably increases the overall thickness of the cap assembly when integrating the cap assembly for pack packaging. When this thickened cap assembly is applied to a battery system, the direct consequence is that the overall volume of the battery expands accordingly, which may affect the compactness, energy density of the battery module and the space utilization efficiency of the final product.

[0042] The partial recess design of the cover plate 1 structure forms a recessed area 11 and a non-recessed area 12, and the functional component 3 can be arranged in the extra space formed by the non-recessed area 12, thereby realizing efficient Pack packaging of the cap assembly. This design not only optimizes the overall layout of the cover plate 1, making the integration of the functional component 3 more compact and reasonable, but also avoids the problem of increasing the overall thickness of the traditional flat cover plate during the Pack process. By skillfully arranging the functional component 3 in the non-recessed area 12, the overall packaging of the cap assembly is realized without increasing the overall volume of the battery, further improving the space utilization efficiency and overall performance of the battery.

[0043] In addition, in order to avoid the design of the first electrode lead-out part 2 occupying the space formed by the recessed area 11, the first electrode lead-out part 2 is arranged in the non-recessed area 12 of the cover plate 1. For example, a through hole 121 penetrating the thickness of the cover plate 1 is formed in the non-recessed area 12 of the cover plate 1, and the first electrode lead-out part 2 is arranged in the through hole 121. The function of the first electrode lead-out part 2 can be to connect the positive electrode or negative electrode inside the battery to electrically connect with the external circuit, realizing the transmission of electric energy. For example, when the first electrode lead-out part 2 is connected with the positive electrode inside the battery, the cover plate 1 can serve as another electrode lead-out part, and the cover plate 1 is connected with the negative electrode inside the battery, and vice versa.

[0044] Since the first electrode lead-out part 2 and the cover plate 1 serve as lead-out parts of different electrodes respectively, in order to ensure the insulation between the electrode lead-out part and the cover plate 1, prevent the risk of current leakage or short circuit, the first electrode lead-out part 2 and the cover plate 1 are isolated. For example, a sealing component 5 can be arranged between the first electrode lead-out part 2 and the cover plate 1, and the design of the sealing component 5 not only ensures the overall sealing of the cap assembly, but also isolates the first electrode lead-out part 2 and the cover plate 1.

[0045] Furthermore, the cover plate 1 is also provided with a liquid injection hole 13, which is mainly used for injecting electrolyte and the like during the manufacturing process of the battery. The position of the liquid injection hole 13 is flexible, which can be arranged near the edge of the recessed area 11, or can be arranged in the non-recessed area 12 of the cover plate 1. Such layout not only facilitates the liquid injection operation, but also avoids the potential impact on the functional component 3 during the liquid injection process. Specifically, the liquid injection hole 13 is arranged near the edge of the recessed area 11, so that the recessed area 11 will have a relatively complete reserved space that will not be cut off, so as to more reasonably arrange the functional component 3. Alternatively, the liquid injection hole 13 is arranged in the non-recessed area 12 of the cover plate 1, so that the liquid injection hole 13 will not occupy the space formed by the recessed area 11.

[0046] Therefore, in this embodiment, a cap assembly is provided by improving the structure of the cover plate 1 in the cap assembly, and reasonably arranging the design position of the first electrode lead-out part 2 and the liquid injection hole 13, so that more space formed by the recessed area 11 can be used to set the functional component 3, realizing the maximum utilization of the space of the recessed area 11. In addition, in the case of setting the functional component 3 in the recessed area 11, the purpose of packaging the cap assembly is achieved without increasing the overall volume of the battery, and the overall performance and space utilization efficiency of the battery are improved.

[0047] In a specific embodiment, the occupied area of the recessed area 11 and the occupied area of the non-recessed area 12 are limited, referring to Figure 1 , the area occupied by the recessed area 11 is greater than the area occupied by the non-recessed area 12.

[0048] In this embodiment, by increasing the area of the recessed area 11, more spacious space is provided for the integration of the functional component 3. This means that more, larger or more complex functional components 3 can be accommodated, such as high-level safety valves, precise temperature sensors, and efficient heat dissipation elements, etc., thereby further improving the safety, reliability and performance of the battery system.

[0049] Secondly, although the area of the non-recessed area 12 is relatively reduced, this area is still used efficiently. For example, the layout of the non-recessed area 12 can be planned to ensure that key components such as the first electrode lead-out part 2 and the liquid injection hole 13 can be reasonably arranged, while not affecting the installation and operation of the functional component 3. This compact and orderly layout not only ensures the overall aesthetics of the battery system, but also maximizes the use of space.

[0050] It is worth noting that the area ratio of the recessed area 11 and the non-recessed area 12 is not fixed, but can be adjusted according to specific application requirements and design goals.

[0051] Further, the shape of the recessed area 11 formed by the cover plate 1 is specifically limited, specifically, the recessed area 11 is not surrounded by the non-recessed area 12 in structure, so that the recessed area 11 has more Pack space. Referring to Figures 1-4 , the recessed area 11 extends to the edge of the cover plate 1 in the length direction of the cap assembly, and the recessed area 11 extends to the edge of the cover plate 1 in the width direction of the cap assembly.

[0052] In this embodiment, the recessed area 11 in this embodiment exhibits great extensibility in the layout of the cap assembly, not only extending in the length direction to the edge of the cover plate 1, but also extending in the width direction to the boundary of the cover plate 1. In this way, the surface space of the cover plate 1 is maximized, providing an unprecedented broad platform for the integration of functional components 3. Functional components 3 can be flexibly arranged along the edge of the recessed area 11, not only in quantity, but also in layout, to meet the specific needs of different application scenarios.

[0053] In one embodiment, the recessed area 11 is configured to provide functional components 3, which include at least one of electronic chips, metal sheets, elastic components, and sensors.

[0054] In this embodiment, the types of functional components 3 are limited, including but not limited to the types defined above.

[0055] For example, functional components 3 can include electronic chips, which can be used in the cap assembly to achieve a variety of intelligent functions, such as battery state monitoring, safety protection control, etc.

[0056] For example, functional components 3 can include metal sheets, which can be used to provide conductive paths, heat dissipation channels, or enhance structural strength. For example, the metal sheet can be a nickel sheet.

[0057] For example, functional components 3 can include elastic components, such as rubber pads, which are mainly used to provide cushioning and sealing.

[0058] For example, functional components 3 can include sensors, which can monitor key parameters such as temperature, pressure, and current of the battery in real time and feed back data to the control system.

[0059] In one embodiment, referring to Figures 2-4 , the cap assembly further includes a sealing portion 4, which is disposed in the liquid injection hole 13.

[0060] In this embodiment, the sealing portion 4 is disposed in the liquid injection hole 13, which mainly functions to quickly and effectively seal the liquid injection hole 13 after the electrolyte injection is completed during the battery manufacturing process, preventing the leakage of electrolyte or the entry of external impurities into the battery interior. This step is crucial for ensuring the safety and stability of the battery.

[0061] For example, the material and design of the sealing portion 4 need to be strictly screened and tested to ensure that it can withstand the high temperature, high pressure, and possibly corrosive environment inside the battery. At the same time, the sealing portion 4 also needs to have good sealing performance and detachability, so that it can be easily replaced or maintained when needed.

[0062] In one embodiment, referring to Figure 1 and Figure 2 In the case where the injection hole 13 is arranged in the recessed area 11 of the cover plate 1, the sealing part 4 does not protrude from the surface of the recessed area 11.

[0063] In this embodiment, the sealing part 4 does not protrude from the surface of the recessed area 11, making the appearance of the entire cap assembly smoother and neater, and improving the overall quality of the product. In addition, the sealing part 4 does not protrude from the surface of the recessed area 11, which can make the surface of the recessed area 11 a flat surface, which is more conducive to packing in the space of the recessed area 11. Secondly, from the perspective of practicality, avoiding the protrusion of the sealing part 4 can reduce the risk of accidental collision or scratching during battery assembly, transportation and use, thereby protecting its integrity and ensuring the durability of the sealing effect.

[0064] In one embodiment, referring to Figures 2-4 The cap assembly further comprises a sealing component 5, which is sleeved on the first electrode lead-out part 2 to isolate the first electrode lead-out part 2 and the cover plate 1; the sealing component 5 is further provided with a matching part 51 which is embedded in the cover plate 1.

[0065] In this embodiment, a sealing component 5 is arranged between the first electrode lead-out part 2 and the cover plate 1, which is sleeved on the outside of the first electrode lead-out part 2, forming an effective isolation barrier to completely separate the first electrode lead-out part 2 from the cover plate 1, thereby avoiding potential electrical short circuit. Exemplarily, the structure of the sealing component 5 is adapted to the structure of the first electrode lead-out part 2, and the sealing component 5 is sleeved on the outside of the first electrode lead-out part 2, which can achieve the purpose of completely isolating the first electrode lead-out part 2 and the cover plate 1.

[0066] In addition, the sealing component 5 is provided with a matching part 51 which can be precisely embedded in the pre-set hole or groove inside the cover plate 1, achieving stable fixation through close fitting. This design not only simplifies the installation process, but also ensures that the sealing component 5 is not easy to loosen or fall off during long-term use. Exemplarily, in the case where the first electrode lead-out part 2 includes a rivet part 21 and a riveting piece 22, the sealing component 5 is first sleeved on the rivet part 21, and then the riveting piece 22 is sleeved on the rivet part 21 for riveting. Before riveting, the matching part 51 of the sealing component 5 and the pre-set hole or groove of the cover plate 1 cooperate, which can avoid the risk of the sealing component 5 being separated from the riveting part.

[0067] In one specific embodiment, referring to Figures 2-4The first electrode lead-out portion 2 includes a rivet portion 21 and a rivet sheet 22, the rivet sheet 22 is sleeved outside the rivet portion 21, and the rivet sheet 22 is located below the sealing component 5 and abuts against the sealing component 5.

[0068] In this specific embodiment, the rivet portion 21 serves as the core part of the lead-out portion, which plays a role in connecting the internal electrode of the battery and the external circuit. The rivet sheet 22 is sleeved outside the rivet portion 21, forming a surrounding structure, which helps to improve the firmness of the first electrode lead-out portion 2 arranged on the cover plate 1.

[0069] The rivet sheet 22 is located below the sealing component 5 and abuts against the sealing component 5. This layout makes the sealing component 5 more effectively isolate the direct contact between the rivet portion 21 and the cover plate 1, and also avoids the direct contact between the rivet sheet 22 and the cover plate 1, thereby avoiding the potential electrical short circuit problem. At the same time, the presence of the rivet sheet 22 also provides a stable support surface for the sealing component 5, which helps to enhance the durability and stability of its sealing effect.

[0070] In an optional embodiment, in the case that the first electrode lead-out portion 2 is arranged on the cover plate 1 through the through hole 121, a sunken area can be arranged around the peripheral area of the through hole 121 in the non-recessed area 12, which can accommodate part of the sealing component 5, so that the overall structure of the cap assembly is more compact.

[0071] In an embodiment, referring to Figures 2-4 The cap assembly further includes an insulating component 6, which is sleeved outside the rivet portion 21 and located below the rivet sheet 22.

[0072] In this embodiment, the cap assembly further includes an insulating component 6, which is sleeved outside the rivet portion 21 and located below the rivet sheet 22, which can further isolate the electrical connection between the rivet portion 21 and other parts of the battery system (which can be the battery cell 8), to prevent potential short circuit risk and ensure the safe operation of the battery system.

[0073] In a second aspect, the embodiments of the present application also provide a battery. Referring to Figures 1-5 The battery includes a shell 7 and a cap assembly as described in the first aspect, the cover plate 1 is welded to the shell 7; a battery cell 8 including a first tab 81 and a second tab 82, the first tab 81 is connected to the first electrode lead-out portion 2, and the second tab 82 is connected to the cover plate 1.

[0074] In this embodiment, the shell 7 of the battery provides a stable working environment for the internal cell 8 and other components. The cap assembly can be tightly connected with the shell 7 through a welding process, forming a sealed and stable top structure to ensure the integrity and stability of the battery system. The cap assembly provided in the embodiments of the present application is applied in a battery, which improves the space utilization efficiency and overall performance of the battery without the need to increase the volume and height of the battery.

[0075] The cell 8 includes a first tab 81 and a second tab 82, the first tab 81 is tightly connected with the first electrode lead-out part 2 in the cap assembly, realizing the effective connection of the cell 8 with the external circuit. The second tab 82 is directly connected with the cover plate 1, forming another electrical path to ensure the effective transmission of the current of the cell 8.

[0076] In another specific embodiment, referring to Figure 5 An insulating adhesive tape 83 is arranged on the first tab 81, specifically, in order to avoid the direct contact between the first tab 81 and the inner surface of the cover plate 1, the insulating adhesive tape 83 is arranged on the surface of the first tab 81 opposite to the end surface of the cell 8, and the insulating adhesive tape 83 is arranged on the surface of the first tab 81 opposite to the inner surface of the cover plate 1.

[0077] An insulating adhesive tape 83 is arranged on the second tab 82, specifically, the insulating adhesive tape 83 is arranged on the surface of the second tab 82 opposite to the end surface of the cell 8.

[0078] In another specific embodiment, referring to Figure 2 An insulating gasket 84 is arranged on the end surface of the cell 8 to avoid short circuit in the battery.

[0079] In a specific embodiment, referring to Figures 1-4 The battery is a square battery.

[0080] In this specific embodiment, the battery is a square battery, and the cap assembly is applied in the square battery. The structure of the cover plate 1 needs to match the shell 7 (flat square structure) of the square battery, for example, the cover plate 1 is similar to a runway structure.

[0081] In a third aspect, the embodiments of the present application also provide an electronic device. The electronic device includes the battery as described above. Exemplarily, the electronic device includes but is not limited to a smartphone, a tablet computer, a smart watch, a headset, etc.

[0082] In the above embodiments, the focus is on the differences between the various embodiments, and the different optimization features between the various embodiments can be combined to form a more optimal embodiment as long as they are not contradictory. Considering the brevity of the writing, it will not be repeated here.

[0083] While certain embodiments of the application have been described in detail as set forth above, modifications and alterations to those embodiments will be apparent to those skilled in the art from this detailed description. It is intended that the scope of the application be limited by nothing other than the appended claims.

Claims

1. A cap assembly, characterized by The cap assembly comprises: a cover plate (1) having an outer surface facing away from the inside of the battery, the outer surface being partially recessed so that the cover plate (1) is formed with a recessed area (11) and a non-recessed area (12), the recessed area and the non-recessed area having a height difference; the cover plate (1) is provided with a first electrode lead-out portion (2) in the non-recessed area (12), the first electrode lead-out portion (2) being isolated from the cover plate (1); the cover plate (1) is provided with a liquid injection hole (13), the liquid injection hole (13) being arranged near the edge of the recessed area (11), or the liquid injection hole (13) being arranged in the non-recessed area (12) of the cover plate (1).

2. The cap assembly of claim 1, wherein The area occupied by the recessed area (11) is greater than the area occupied by the non-recessed area (12).

3. The cap assembly of claim 1, wherein, The recessed area (11) extends to the edge of the cover plate (1) in the length direction of the cap assembly, and the recessed area (11) extends to the edge of the cover plate (1) in the width direction of the cap assembly.

4. The cap assembly of claim 1, wherein, The recessed area (11) is configured to be provided with a functional component (3), the functional component (3) comprising at least one of an electronic chip, a metal sheet, an elastic component, and a sensor.

5. The cap assembly of any one of claims 1-4, wherein, The cap assembly further comprises a plugging portion (4) arranged in the liquid injection hole (13).

6. The cap assembly of claim 5, wherein, In the case where the liquid injection hole (13) is arranged in the recessed area (11) of the cover plate (1), the plugging portion (4) does not protrude from the surface of the recessed area (11).

7. The cap assembly of claim 5, wherein, The cap assembly further comprises a sealing component (5) sleeved outside the first electrode lead-out portion (2) to isolate the first electrode lead-out portion (2) and the cover plate (1); the sealing component (5) is provided with a fitting portion (51) embedded in the cover plate (1).

8. The cap assembly of claim 7, wherein, The first electrode lead-out portion (2) comprises a rivet portion (21) and a rivet sheet (22), the rivet sheet (22) being sleeved outside the rivet portion (21) and located below the sealing component (5) and abutting against the sealing component (5).

9. The cap assembly of claim 8, wherein, The cap assembly further comprises an insulating component (6) sleeved outside the rivet portion (21) and located below the rivet sheet (22).

10. A battery, characterized by The battery comprises: a shell (7) and the cap assembly according to any one of claims 1-9, the cover plate (1) being welded to the shell (7); an electric core (8) comprising a first tab (81) and a second tab (82), the first tab (81) being connected to the first electrode lead-out portion (2), and the second tab (82) being connected to the cover plate (1).

11. The battery of claim 10, wherein, The battery is a square battery.

12. An electronic device, comprising: The electronic device comprises the battery according to claim 10 or 11.

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