Secondary battery and electronic equipment
By setting a conductive layer on the protection board and electrically connecting it to the tabs, the problem of large space occupied by conductive components is solved, thereby increasing the capacity of the secondary battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA ELECTRONICS CO LTD
- Filing Date
- 2025-03-21
- Publication Date
- 2026-05-15
AI Technical Summary
In the prior art, conductive components with snap-fit parts occupy a lot of space in the length direction of the lithium battery, which affects the space occupied by the cell in the length direction of the lithium battery, thus preventing the capacity of the lithium battery from being further increased.
A conductive layer is set on the protection board, and the tabs are electrically connected to the conductive layer, which simplifies the structure, reduces the space occupied in the third direction of the secondary battery, and realizes the electrical connection between the protection board and the battery cell.
This effectively reduces the space occupied by conductive components along the length of the secondary battery, while increasing the space occupied by the battery cell along the length, thereby improving the capacity of the secondary battery.
Smart Images
Figure CN224248658U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a secondary battery and electronic device. Background Technology
[0002] Electronic devices, such as mobile phones or laptops, are powered by lithium batteries. These batteries also contain a battery protection board, which primarily protects the lithium battery during charging and discharging, thus extending its lifespan. To improve the battery life of electronic devices, the capacity of lithium batteries needs to be increased, which in turn requires improving the space utilization of the lithium battery.
[0003] In related technologies, the battery protection board is typically placed parallel to the end face of the battery cell at the end of the cell. This reduces the space occupied by the battery protection board along the length of the lithium battery, thereby facilitating a larger space occupied by the battery cell along the length of the lithium battery and ultimately increasing the battery's capacity. Existing battery protection boards usually have conductive components that engage with the tabs of the battery cell to achieve electrical connection between the battery protection board and the cell. However, these conductive components with engaging parts occupy a significant amount of space along the length of the lithium battery, thus affecting the space occupied by the battery cell along the length of the lithium battery and preventing further increases in battery capacity. Utility Model Content
[0004] In order to achieve the above objectives, this application aims to provide a secondary battery that solves the technical problem in the prior art where conductive components with snap-fit parts occupy too much space in the length direction of the lithium battery, thus affecting the space occupied by the cell in the length direction of the lithium battery and preventing further improvement of the lithium battery capacity.
[0005] The technical solution adopted is as follows:
[0006] In a first aspect, embodiments of this application provide a secondary battery having a first direction, a second direction, and a third direction that are perpendicular to each other, and the secondary battery includes:
[0007] A battery cell, wherein a tab is provided at one end along the third direction;
[0008] A protection plate extends along the first direction and is disposed at one end of the battery cell having the tab. One side of the protection plate faces the end face of the battery cell. The protection plate is provided with components and a conductive layer. The components are located on the side of the protection plate away from the battery cell, and the conductive layer is located on the side of the protection plate away from or close to the battery cell. The tab is electrically connected to the conductive layer.
[0009] In one embodiment of the first aspect, the conductive layer is located on the side of the protective plate away from the battery cell, and the tab is bent and extended to the side of the protective plate away from the battery cell and is electrically connected to the conductive layer.
[0010] In one embodiment of the first aspect, the tab includes a first straight segment, a first bent segment, and a second straight segment. The first bent segment is connected to the first straight segment and the second straight segment, respectively. The first straight segment and the second straight segment both extend along the second direction. The first straight segment is located on the side of the protection plate closer to the battery cell, and the second straight segment is located on the side of the protection plate away from the battery cell and is electrically connected to the conductive layer.
[0011] In one embodiment of the first aspect, the tab further includes a third straight section and a second bent section, one end of the third straight section being connected to the battery cell and the other end extending along the third direction, and the second bent section being connected to the end of the third straight section away from the battery cell and the end of the first straight section away from the first bent section, respectively.
[0012] In one embodiment of the first aspect, the conductive layer is located on the side of the protective plate away from the battery cell and is located at the edge of the protective plate along the second direction.
[0013] In one embodiment of the first aspect, the conductive layer is located on the side of the protective plate near the battery cell, and the tab is bent and extended to the side of the protective plate near the battery cell and is electrically connected to the conductive layer.
[0014] In one embodiment of the first aspect, the tab includes a first straight segment, a first bent segment, and a second straight segment. The first bent segment is connected to the first straight segment and the second straight segment, respectively. The first straight segment and the second straight segment both extend along the second direction. The first straight segment and the second straight segment are both located on the side of the protection plate closer to the battery cell. The second straight segment is electrically connected to the conductive layer.
[0015] The electrode tab also includes a third straight section and a second bent section. One end of the third straight section is connected to the battery cell, and the other end extends along the third direction. The second bent section is connected to the end of the third straight section away from the battery cell and the end of the first straight section away from the first bent section, respectively.
[0016] In one embodiment of the first aspect, the tab includes a fourth straight segment, a third bent segment, and a fifth straight segment. The third bent segment is connected to the fourth straight segment and the fifth straight segment, respectively. The end of the fourth straight segment away from the third bent segment extends along the third direction and is connected to the battery cell. The end of the fifth straight segment away from the third bent segment extends along the second direction, and the fifth straight segment is electrically connected to the conductive layer.
[0017] In one embodiment of the first aspect, the conductive layer is located on the side of the protective plate close to the battery cell, and is located at the edge or middle of the protective plate along the second direction.
[0018] Secondly, embodiments of this application also provide an electronic device, including the secondary battery described in any of the above embodiments.
[0019] The beneficial effects of this application are as follows: This application proposes a secondary battery, which includes a battery cell and a protection board. The battery cell has a tab at one end along a third direction. The protection board extends along a first direction and is disposed at the end of the battery cell with the tab. One surface of the protection board faces the end face of the battery cell. Components are disposed on the protection board, located on the side of the protection board away from the battery cell. By providing a conductive layer on the protection board, positioned on the side of the protection board away from or close to the battery cell, and electrically connecting the tab to the conductive layer, an electrical connection between the protection board and the battery cell is achieved. Compared to conductive components with snap-fit parts in the prior art, the conductive layer effectively simplifies the structure and reduces its space occupation in the third direction of the secondary battery, thereby increasing the space occupied by the battery cell in the third direction and further improving the capacity of the secondary battery. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A side view of a secondary battery in some embodiments of this application is shown. Figure 1 ;
[0022] Figure 2 A side view of a secondary battery in some embodiments of this application is shown. Figure 2 ;
[0023] Figure 3 A top view of the protective plate is shown in some embodiments of this application. Figure 1 ;
[0024] Figure 4 It shows Figure 3 A bottom view of the central protective plate;
[0025] Figure 5 A top view of the protective plate is shown in some embodiments of this application. Figure 2 ;
[0026] Figure 6 It shows Figure 5 A bottom view of the central protective plate.
[0027] Explanation of key component symbols:
[0028] 100-Secondary Battery;
[0029] 110 - Battery cell; 111 - Electrode; 1111 - First straight section; 1112 - First bent section; 1113 - Second straight section; 1114 - Third straight section; 1115 - Second bent section;
[0030] 120 - Protection board; 121 - Components; 122 - Conductive layer;
[0031] X - First direction;
[0032] Y - Second direction;
[0033] Z - Third-party orientation. Detailed Implementation
[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0039] like Figure 1 and Figure 2 As shown, an embodiment of this application provides a secondary battery 100, mainly used in electronic devices. The secondary battery 100 has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. The secondary battery 100 includes a cell 110 and a protection board 120.
[0040] The battery cell 110 has a tab 111 at one end along the third direction Z. The protection plate 120 extends along the first direction X and is disposed at the end of the battery cell 110 with the tab 111. One of the plates of the protection plate 120 faces the end face of the battery cell 110. The protection plate 120 is provided with a component 121 and a conductive layer 122. The component 121 is located on the side of the protection plate 120 away from the battery cell 110. The conductive layer 122 is located on the side of the protection plate 120 away from or close to the battery cell 110. The tab 111 is electrically connected to the conductive layer 122.
[0041] The secondary battery 100 provided in the embodiments of this application achieves electrical connection between the protection plate 120 and the battery cell 110 by providing a conductive layer 122 on the protection plate 120. The conductive layer 122 is disposed on the side of the protection plate 120 away from or close to the battery cell 110, and the tab 111 is electrically connected to the conductive layer 122. Compared with the conductive components with snap-fit parts in the prior art, the conductive layer 122 effectively simplifies the structure and reduces its occupied space in the third direction Z of the secondary battery 100, thereby increasing the occupied space of the battery cell 110 in the third direction Z, and further improving the capacity of the secondary battery 100. This avoids the technical problem in the prior art where the conductive components with snap-fit parts occupy too much space in the length direction of the lithium battery, which affects the occupied space of the battery cell in the length direction of the lithium battery, thus preventing further improvement of the lithium battery capacity.
[0042] For example, the protection board 120 can be a printed circuit board, the conductive layer 122 can be copper foil or other conductive metal materials, it can be a single layer of metal or a composite metal layer composed of multiple layers of metal, such as copper-nickel-gold, etc., and the electrode 111 can be electrically connected to the conductive layer 122 by soldering.
[0043] like Figure 1 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the conductive layer 122 is located on the side of the protection plate 120 away from the battery cell 110, and the tab 111 is bent and extended to the side of the protection plate 120 away from the battery cell 110, and is electrically connected to the conductive layer 122.
[0044] In this embodiment, by placing the conductive layer 122 and the component 121 on the side of the protection plate 120 away from the cell 110, and bending the tab 111 to extend to the side of the protection plate 120 away from the cell 110 and electrically connecting it to the conductive layer 122, the space occupied by the protection plate 120, the component 121 and the conductive layer 122 in the third direction Z can be minimized, thereby maximizing the space occupied by the cell 110 in the third direction Z, and thus maximizing the capacity of the secondary battery 100.
[0045] like Figure 1As shown in the above embodiments of this application, the tab 111 includes a first straight segment 1111, a first bent segment 1112, and a second straight segment 1113. The first bent segment 1112 is connected to both the first straight segment 1111 and the second straight segment 1113. Both the first straight segment 1111 and the second straight segment 1113 extend along the second direction Y. The first straight segment 1111 is located on the side of the protection plate 120 closer to the battery cell 110, and the second straight segment 1113 is located on the side of the protection plate 120 away from the battery cell 110 and is electrically connected to the conductive layer 122. This achieves an electrical connection between the tab 111 and the conductive layer 122, thereby achieving an electrical connection between the protection plate 120 and the battery cell 110.
[0046] For example, the first straight segment 1111, the first bent segment 1112 and the second straight segment 1113 can be integrally formed by stamping or sheet metal bending, and the electrical connection between the second straight segment 1113 and the conductive layer 122 can be welding.
[0047] like Figure 1 As shown in the above embodiments of this application, the tab 111 further includes a third straight segment 1114 and a second bent segment 1115. One end of the third straight segment 1114 is connected to the battery cell 110, and the other end extends along the third direction Z. The second bent segment 1115 is connected to the end of the third straight segment 1114 away from the battery cell 110 and the end of the first straight segment 1111 away from the first bent segment 1112, respectively. This creates a gap between the first straight segment 1111 and the end face of the battery cell 110, facilitating the placement of an insulating layer in this gap to prevent the first straight segment 1111 from contacting the battery cell 110 and causing a short circuit.
[0048] For example, the third straight segment 1114, the second bent segment 1115, the first straight segment 1111, the first bent segment 1112, and the second straight segment 1113 can be manufactured by stamping or sheet metal bending in one piece.
[0049] like Figure 1 , Figure 3 and Figure 4 As shown, in the above embodiments of this application, the conductive layer 122 is located on the side of the protection plate 120 away from the battery cell 110, and is located at the edge of the protection plate 120 along the second direction Y.
[0050] In this embodiment, by placing the conductive layer 122 on the side of the protective plate 120 away from the cell 110 and placing the conductive layer 122 on the edge of the protective plate 120 along the second direction Y, it is convenient for the tab 111 to bend and extend to the side of the protective plate 120 away from the cell 110 and then directly weld it to the conductive layer 122 to achieve electrical connection. On the other hand, it can also avoid the component 121, so that the component 121 and the conductive layer 122 are spaced apart along the second direction Y on the side of the protective plate 120 away from the cell 110, so as to minimize the space occupied by the protective plate 120, the component 121 and the conductive layer 122 in the third direction Z, thereby maximizing the space occupied by the cell 110 in the third direction Z, and thus maximizing the capacity of the secondary battery 100.
[0051] like Figure 2 , Figure 5 and Figure 6 As shown, in one embodiment of this application, the conductive layer 122 is located on the side of the protection plate 120 near the battery cell 110, and the tab 111 is bent and extended to the side of the protection plate 120 near the battery cell 110, and is electrically connected to the conductive layer 122.
[0052] In this embodiment, by placing the conductive layer 122 and the component 121 on the side of the protection plate 120 close to and away from the cell 110, respectively, and bending the tab 111 to extend to the side of the protection plate 120 close to the cell 110 and electrically connecting it with the conductive layer 122, it is convenient for the tab 111 to be bent and directly welded to the conductive layer 122 to achieve electrical connection. Compared with the conductive components with snap-fit parts in the prior art, the conductive layer 122 effectively simplifies the structure and reduces its space occupied in the third direction Z of the secondary battery 100, thereby increasing the space occupied by the cell 110 in the third direction Z, and further improving the capacity of the secondary battery 100.
[0053] like Figure 2 As shown in the above embodiments of this application, the tab 111 includes a first straight segment 1111, a first bent segment 1112, and a second straight segment 1113. The first bent segment 1112 is connected to both the first straight segment 1111 and the second straight segment 1113. Both the first straight segment 1111 and the second straight segment 1113 extend along the second direction Y. Both the first straight segment 1111 and the second straight segment 1113 are located on the side of the protection plate 120 near the battery cell 110. The second straight segment 1113 is electrically connected to the conductive layer 122. Thus, an electrical connection is achieved between the tab 111 and the conductive layer 122, thereby achieving an electrical connection between the protection plate 120 and the battery cell 110.
[0054] The tab 111 further includes a third straight segment 1114 and a second bent segment 1115. One end of the third straight segment 1114 is connected to the battery cell 110, and the other end extends along the third direction Z. The second bent segment 1115 is connected to the end of the third straight segment 1114 away from the battery cell 110 and the end of the first straight segment 1111 away from the first bent segment 1112. This creates a gap between the first straight segment 1111 and the end face of the battery cell 110, allowing an insulating layer to be placed in this gap to prevent the first straight segment 1111 from contacting the battery cell 110 and causing a short circuit. For example, the third straight segment 1114, the second bent segment 1115, the first straight segment 1111, the first bent segment 1112, and the second straight segment 1113 can be integrally formed by stamping or sheet metal bending. The electrical connection between the second straight segment 1113 and the conductive layer 122 can be welding.
[0055] In the above embodiments of this application, the tab 111 includes a fourth straight segment, a third bent segment, and a fifth straight segment. The third bent segment is connected to the fourth straight segment and the fifth straight segment, respectively. The end of the fourth straight segment away from the third bent segment extends along the third direction Z and is connected to the battery cell 110. The end of the fifth straight segment away from the third bent segment extends along the second direction Y, and the fifth straight segment is electrically connected to the conductive layer 122.
[0056] Therefore, on the one hand, a gap is created between the fifth straight segment and the end face of the cell 110, which facilitates the placement of an insulating layer in the gap to prevent the fifth straight segment from contacting the cell 110 and causing a short circuit. On the other hand, the direct electrical connection between the fifth straight segment and the conductive layer 122 eliminates the need for the first bent segment 1112 and the second straight segment 1113 in the above embodiment, thereby further reducing the space occupied by the tab 111, the conductive layer 122, and the protection plate 120 in the Z direction, and thus further increasing the capacity of the secondary battery 100.
[0057] For example, the fourth straight segment, the third bent segment, and the fifth straight segment can be integrally formed by stamping or sheet metal bending, and the electrical connection between the fifth straight segment and the conductive layer 122 can be welding.
[0058] like Figure 2 , Figure 5 and Figure 6 As shown, in the above embodiments of this application, the conductive layer 122 is located on the side of the protection plate 120 close to the battery cell 110, and is located at the edge or middle of the protection plate 120 along the second direction Y.
[0059] In this embodiment, by setting the conductive layer 122 on the side of the protective plate 120 near the battery cell 110, and setting the conductive layer 122 at the edge or middle position of the protective plate 120 along the second direction Y, the tab 111 can be bent and extended to the side of the protective plate 120 near the battery cell 110 and then directly welded to the conductive layer 122 to achieve electrical connection.
[0060] Embodiments of this application also provide an electronic device, including the secondary battery 100 in any of the above embodiments.
[0061] The electronic device has the secondary battery 100 in any of the above embodiments, and therefore has all the beneficial effects of the secondary battery 100, which will not be described in detail here.
[0062] For example, electronic devices can be mobile phones, tablets, laptops, and other electronic products.
[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0064] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A secondary battery, said secondary battery (100) having a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other, characterized in that, The secondary battery (100) includes: A battery cell (110) is provided with a tab (111) at one end along the third direction (Z); A protection plate (120) extends along the first direction (X) and is disposed at one end of the battery cell (110) having the tab (111). One side of the protection plate (120) faces the end face of the battery cell (110). The protection plate (120) is provided with a component (121) and a conductive layer (122). The component (121) is located on the side of the protection plate (120) away from the battery cell (110). The conductive layer (122) is located on the side of the protection plate (120) away from or close to the battery cell (110). The tab (111) is electrically connected to the conductive layer (122).
2. The secondary battery according to claim 1, characterized in that, The conductive layer (122) is located on the side of the protection plate (120) away from the battery cell (110), and the tab (111) is bent and extended to the side of the protection plate (120) away from the battery cell (110) and is electrically connected to the conductive layer (122).
3. The secondary battery according to claim 2, characterized in that, The tab (111) includes a first straight segment (1111), a first bent segment (1112), and a second straight segment (1113). The first bent segment (1112) is connected to the first straight segment (1111) and the second straight segment (1113) respectively. The first straight segment (1111) and the second straight segment (1113) both extend along the second direction (Y). The first straight segment (1111) is located on the side of the protection plate (120) close to the battery cell (110), and the second straight segment (1113) is located on the side of the protection plate (120) away from the battery cell (110) and is electrically connected to the conductive layer (122).
4. The secondary battery according to claim 3, characterized in that, The tab (111) further includes a third straight section (1114) and a second bent section (1115). One end of the third straight section (1114) is connected to the battery cell (110), and the other end extends along the third direction (Z). The second bent section (1115) is connected to the end of the third straight section (1114) away from the battery cell (110) and the end of the first straight section (1111) away from the first bent section (1112), respectively.
5. The secondary battery according to claim 2, characterized in that, The conductive layer (122) is located on the side of the protective plate (120) away from the battery cell (110) and is located at the edge of the protective plate (120) along the second direction (Y).
6. The secondary battery according to claim 1, characterized in that, The conductive layer (122) is located on the side of the protection plate (120) near the battery cell (110), and the tab (111) is bent and extended to the side of the protection plate (120) near the battery cell (110) and is electrically connected to the conductive layer (122).
7. The secondary battery according to claim 6, characterized in that, The tab (111) includes a first straight segment (1111), a first bent segment (1112), and a second straight segment (1113). The first bent segment (1112) is connected to the first straight segment (1111) and the second straight segment (1113) respectively. The first straight segment (1111) and the second straight segment (1113) both extend along the second direction (Y). The first straight segment (1111) and the second straight segment (1113) are both located on the side of the protection plate (120) close to the battery cell (110). The second straight segment (1113) is electrically connected to the conductive layer (122). The tab (111) further includes a third straight section (1114) and a second bent section (1115). One end of the third straight section (1114) is connected to the battery cell (110), and the other end extends along the third direction (Z). The second bent section (1115) is connected to the end of the third straight section (1114) away from the battery cell (110) and the end of the first straight section (1111) away from the first bent section (1112), respectively.
8. The secondary battery according to claim 6, characterized in that, The tab (111) includes a fourth straight segment, a third bent segment and a fifth straight segment. The third bent segment is connected to the fourth straight segment and the fifth straight segment respectively. The end of the fourth straight segment away from the third bent segment extends along the third direction (Z) and is connected to the battery cell (110). The end of the fifth straight segment away from the third bent segment extends along the second direction (Y) and is electrically connected to the conductive layer (122).
9. The secondary battery according to claim 6, characterized in that, The conductive layer (122) is located on the side of the protection plate (120) close to the battery cell (110), and is located at the edge or middle of the protection plate (120) along the second direction (Y).
10. An electronic device, characterized in that, The secondary battery (100) includes any one of claims 1 to 9.