A battery structure and an electronic device

Abstract

The present invention provides a battery structure and an electronic device. The battery structure includes: an upper cover, a lower cover, an electric core, a first tab and a second tab. The upper cover includes a top cover and a first cap ring. The first end of the first tab is disposed at the joint between the top cover and the first cap ring. The second end of the first tab is connected to the electric core. The electric core is disposed inside the upper cover and the lower cover. Embodiments of the present invention can enhance the firmness of the tab connection.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly relates to a battery structure and an electronic device. Background Art

[0002] With the development and progress of technology, the market demand for wearable devices, such as wireless earphones, sports watches, and bracelets, is increasing day by day. Button batteries are an important part of wearable devices. In the structure of button batteries on the current market, the tab is welded to the surface of the battery cover, and the connection firmness of the tab is poor. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a battery structure and an electronic device to solve the problem of poor connection firmness of the tab in the battery structure.

[0004] To achieve the above purpose, the embodiments of the present invention provide a battery structure and an electronic device. The battery structure includes: an upper cover, a lower cover, an electrode core, a first tab, and a second tab. The upper cover includes a top cover and a first cap ring. The first end of the first tab is disposed at the joint between the top cover and the first cap ring, the second end of the first tab is connected to the electrode core, and the electrode core is disposed inside the upper cover and the lower cover.

[0005] Optionally, the joint between the top cover and the first cap ring includes a wedge-shaped structure, and the wedge-shaped structure includes a conical surface that tapers from the edge of the top cover towards the center.

[0006] Optionally, a ring of convex rings with a V-shaped cross-section is provided at the edge of the top cover, and the conical surface of the top cover is the outer surface of the convex ring; or,

[0007] A chamfer is provided at the edge of the top cover, and the conical surface of the top cover is the chamfer surface; or,

[0008] A flanging is provided at the edge of the top cover, and the conical surface of the top cover is the outer surface of the flanging; or the included angle between the generatrix of the conical surface of the top cover and the lower surface of the top cover is 26° - 61°.

[0009] Optionally, the distance from the joint between the conical surface of the top cover and the surface of the first cap ring to the edge of the top cover is 0.03 - 0.5 mm.

[0010] Optionally, a first strip-shaped groove is provided on the conical surface of the wedge-shaped structure, the first strip-shaped groove extends along the conical generatrix, and the first tab is located in the first strip-shaped groove.

[0011] Optionally, the connection between the first tab and the battery cell is a first position, and the distance from the first position to the center of the battery cell is greater than the distance from the first position to the edge of the battery cell; the battery cell is a wound battery cell.

[0012] Optionally, the first end of the second tab is connected to the lower cover, and the second end of the second tab is connected to the battery cell.

[0013] Optionally, the lower cover includes a bottom cover and a second cap ring, and the first end of the second tab is disposed at the joint between the bottom cover and the second cap ring; alternatively, the first end of the second tab is disposed on the inner surface of the lower cover.

[0014] Optionally, the battery structure further includes: an adhesive layer, the adhesive layer is disposed between the upper cover and the battery cell and / or between the lower cover and the battery cell, the material of the adhesive layer is an insulating material, and the adhesive layer contains a viscous substance.

[0015] An embodiment of the present invention further provides an electronic device, characterized in that the electronic device includes the battery structure provided by the embodiment of the present invention.

[0016] One of the above technical solutions has the following advantages or beneficial effects:

[0017] In the embodiment of the present invention, the battery structure includes: an upper cover, a lower cover, a battery cell, a first tab and a second tab. The upper cover includes a top cover and a first cap ring. Since the first end of the first tab is disposed at the joint between the top cover and the first cap ring, the second end of the first tab is connected to the battery cell, and the battery cell is disposed inside the upper cover and the lower cover. In this way, compared with the prior art in which the tab is welded to the surface of the battery outer cover, the embodiment of the present invention can strengthen the firmness of the tab connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic cross-sectional view of a battery structure provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic cross-sectional view of another battery structure provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic cross-sectional view of another battery structure provided by an embodiment of the present invention;

[0021] Figure 4 is a schematic cross-sectional view of another battery structure provided by an embodiment of the present invention;

[0022] Figure 5 is a schematic view of a battery structure provided by an embodiment of the present invention. Detailed implementation manners

[0023] To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] As Figure 1 shown, an embodiment of the present invention provides a schematic structural diagram of a battery structure. As Figure 1 shown, it includes: an upper cover 11, a lower cover 12, a battery cell 13, a first tab 14 and a second tab 15. The upper cover 11 includes a top cover 111 and a first cap ring 112. The first end of the first tab 14 is disposed at the joint between the top cover 111 and the first cap ring 112. The second end of the first tab 14 is connected to the battery cell 13. The battery cell 13 is disposed inside the upper cover 11 and the lower cover 12.

[0025] In an embodiment of the present invention, the first end of the first tab 14 is disposed at the joint between the top cover 111 and the first cap ring 112, and the first end of the first tab 14 is fixed in the upper cover 11.

[0026] The upper cover 11, the lower cover 12, the first tab 14 and the second tab 15 are metal conductors and have electrical conductivity. In the battery structure, the first tab 14 and the second tab 15 can lead electricity out from the battery cell 13, and the upper cover 11 and the lower cover 12 can be used as different electrodes in the battery structure respectively.

[0027] In an embodiment of the present invention, the type of the battery of the battery structure is not limited. For example, the battery structure can be the structure of a rechargeable battery, and the battery structure can also be the structure of a primary battery. The embodiments of the present invention do not make any limitation thereto.

[0028] In an embodiment of the present invention, the external shape of the battery structure is not limited. For example, the external shape of the battery structure can be a cylindrical shape, and the external shape of the battery structure can also be a cuboid shape. The embodiments of the present invention do not make any limitation thereto.

[0029] In an embodiment of the present invention, the type of the battery cell 13 is not limited. For example, the battery cell 13 can be a wound battery cell or a stacked battery cell. The embodiments of the present invention do not make any limitation thereto.

[0030] In the embodiments of the present invention, there is no limitation on the bonding method among the top cover 111, the first cap ring 112, the lower cover 12, the battery cell 13, the first tab 14 and the second tab 15. For example, in the bonding process of the top cover 111, the first cap ring 112, the lower cover 12, the battery cell 13, the first tab 14 and the second tab 15, an injection molding process can be used for integral molding, an extrusion molding process can also be used, or a laser welding process can be used. The embodiments of the present invention do not limit this.

[0031] In the embodiments of the present invention, since the first end of the first tab 14 is arranged at the joint between the top cover 111 and the first cap ring 112, compared with the prior art where the tab is welded on the surface of the battery outer cover, the embodiments of the present invention can strengthen the firmness of the tab connection.

[0032] As an alternative embodiment, as Figure 2 shown, the joint between the top cover 111 and the first cap ring 112 includes a wedge-shaped structure, and the wedge-shaped structure includes a conical surface that tapers from the edge of the top cover 111 towards the center.

[0033] In this embodiment, the setting of the wedge-shaped structure makes the joint between the top cover 111 and the first cap ring 112 tighter. The first end of the first tab 14 is arranged at the wedge-shaped structure between the top cover 111 and the first cap ring 112, which strengthens the firmness of the connection of the first tab 14.

[0034] As an alternative embodiment, a ring of convex rings with a V-shaped cross-section is arranged at the edge of the top cover 111, and the conical surface of the top cover 111 is the outer surface of the convex rings; or,

[0035] a chamfer is arranged around the edge of the top cover 111, and the conical surface of the top cover 111 is the chamfer surface; or,

[0036] a flanging is arranged at the edge of the top cover 111, and the conical surface of the top cover 111 is the outer surface of the flanging; or,

[0037] The included angle between the generatrix of the conical surface of the top cover 111 and the lower surface of the top cover 111 is 26° - 61°.

[0038] This embodiment improves the firmness of the connection between the top cover 111 and the first cap ring 112 and improves the sealing performance of the battery structure.

[0039] As an alternative embodiment, as Figure 2 shown, the distance from the joint between the conical surface of the top cover 111 and the surface of the first cap ring 112 to the edge of the top cover 111 is 0.03 - 0.5 mm.

[0040] In this embodiment, as Figure 2 shown, the distance from the joint of the conical surface of the top cover 111 and the surface of the first cap ring 112 to the edge of the top cover 111 is 0.03 - 0.5 mm. The first end of the first tab 14 is disposed at the joint between the top cover 111 and the first cap ring 112 to avoid the exposure of the first tab 14. The first tab 14 is completely embedded in the battery structure, and the first end of the first tab 14 is completely embedded in the upper cover 11, improving the sealing performance of the battery structure.

[0041] As an alternative embodiment, a first strip-shaped groove is provided on the conical surface of the wedge-shaped structure, and the first strip-shaped groove extends along the conical generatrix. The first tab 14 is located in the first strip-shaped groove.

[0042] In this embodiment, a space structure for placing the first tab 14 is provided at the wedge-shaped structure. A first strip-shaped groove is provided on the conical surface of the wedge-shaped structure. The first tab 14 is located in the first strip-shaped groove, and the first tab 14 closely fits with the first strip-shaped groove. In addition, the first strip-shaped groove extends along the conical generatrix, standardizing the placement position of the first tab 14 and strengthening the firmness of the tab connection.

[0043] A special and specific space structure is provided at the joint of the top cover 111 and the first cap ring 112 for placing the first tab 14, improving the sealing performance of the battery structure.

[0044] As an alternative embodiment, as Figure 1 shown, the connection part of the first tab 14 and the battery cell 13 is the first position, and the distance from the first position to the center of the battery cell 13 is greater than the distance from the first position to the edge of the battery cell 13; the battery cell 13 is a wound battery cell.

[0045] In this embodiment, as Figure 1 shown, the first tab 14 is led out from the edge of the first side of the battery cell 13, reducing the possible contact area between the first tab 14 and the battery cell 13, reducing the possibility of contact between the first tab 14 and the electrode plate in the battery cell 13, and reducing the possibility of internal short circuit in the battery structure.

[0046] As an alternative embodiment, as Figure 1 shown, the first end of the second tab 15 is connected to the lower cover 12, and the second end of the second tab 15 is connected to the battery cell 13.

[0047] In this embodiment, the second tab 15 is led out from the second side of the battery cell 13. The first side and the second side of the battery cell 13 are opposite sides of the battery cell 13. The first tab 14 is connected to the first side of the battery cell 13, and the second tab 15 is connected to the second side of the battery cell 13.

[0048] In this embodiment, there is no limitation on the position where the second end of the second tab 15 is connected to the battery cell 13. For example, as Figure 3 shown, the connection position between the second tab 15 and the battery cell 13 can be a second position. The distance from the second position to the center of the battery cell 13 is greater than the distance from the second position to the edge of the battery cell 13. The second tab 15 can be led out from the edge of the second side of the battery cell 13, which can reduce the possible contact area between the second tab 15 and the battery cell 13, reduce the possibility of contact between the second tab 15 and the electrode tab in the battery cell 13, and reduce the possibility of internal short circuit in the battery structure.

[0049] As an alternative embodiment, as Figure 3 shown, the lower cover 12 includes a bottom cover 121 and a second cap ring 122. The first end of the second tab 15 is disposed at the joint between the bottom cover 121 and the second cap ring 122; or, the first end of the second tab 15 is disposed on the inner surface of the lower cover.

[0050] In this embodiment, the first end of the second tab 15 is disposed at the joint between the bottom cover 121 and the second cap ring 122, and the second tab 15 is fixed in the lower cover 12, which strengthens the firmness of the connection of the second tab 15.

[0051] When the first end of the second tab 15 is disposed on the inner surface of the lower cover 12, in the manufacturing process of the battery, the manufacturing difficulty of the battery structure is reduced.

[0052] The second tab 15 is completely embedded in the battery structure, and the first end of the second tab 15 is completely embedded in the lower cover 12, avoiding the exposure of the second tab 15 and improving the sealing performance of the battery structure.

[0053] As an alternative embodiment, as Figure 4 shown, the battery structure further includes: an adhesive layer 16. The adhesive layer 16 is disposed between the upper cover 11 and the battery cell 13 and / or between the lower cover 12 and the battery cell 13. The material of the adhesive layer 16 is an insulating material, and the adhesive layer 16 contains a viscous substance.

[0054] As Figure 4As shown, the adhesive layer 16 comprises a sticky substance, and the adhesive layer 16 is disposed between the upper cover 11 and the battery cell 13 and / or between the lower cover 12 and the battery cell 13. The adhesive layer 16 can be used to bond between the upper cover 11 and the battery cell 13 and / or between the lower cover 12 and the battery cell 13. Meanwhile, the material of the adhesive layer 16 is an insulating material, which avoids the contact between the upper cover 1 and the lower cover 2 and reduces the possibility of internal short circuit of the battery.

[0055] As Figure 5 shown, Figure 5 is a schematic diagram of a battery structure provided by an embodiment of the present invention. Figure 5 The battery structure shown is a cylindrical structure.

[0056] In an embodiment of the present invention, the battery structure includes: an upper cover, a lower cover, a battery cell, a first tab and a second tab. The upper cover includes a top cover and a first retaining ring. Since the first end of the first tab is disposed at the joint between the top cover and the first retaining ring, the second end of the first tab is connected to the battery cell, and the battery cell is disposed inside the upper cover and the lower cover. Thus, compared with the prior art in which the tab is welded on the surface of the battery outer cover, the embodiment of the present invention can enhance the firmness of the tab connection.

[0057] In addition, in an embodiment of the present invention, an electronic device is further provided, which includes the battery structure according to any implementation manner provided by the embodiment of the present invention.

[0058] The above are the preferred implementation manners of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A battery structure, characterized in that, Comprising: An upper cover, a lower cover, an electric core, an adhesive layer, a first tab and a second tab. The upper cover includes a top cover and a first collar. The first collar is a metal conductor. The first end of the first tab is disposed at the joint between the top cover and the first collar. The second end of the first tab is connected to the electric core. The electric core is disposed inside the upper cover and the lower cover. The adhesive layer is disposed between the upper cover and the lower cover. The material of the adhesive layer is an insulating material, and the adhesive layer contains a viscous substance. The outer surface of the upper cover contacts the adhesive layer. The inner surface of the lower cover contacts the adhesive layer. The first tab is connected to the first side of the electric core. The second tab is connected to the second side of the electric core. The first side and the second side of the electric core are opposite sides of the electric core, and the first side of the electric core is the side facing the upper cover.

2. The battery structure according to claim 1, characterized in that, The joint between the top cover and the first collar includes a wedge-shaped structure. The wedge-shaped structure includes a conical surface that tapers from the edge of the top cover towards the center.

3. The battery structure according to claim 2, characterized in that, A convex ring with a V-shaped cross-section is provided around the edge of the top cover. The conical surface of the top cover is the outer surface of the convex ring; or, A chamfer is provided around the edge of the top cover. The conical surface of the top cover is the chamfer surface; or, A flanging is provided at the edge of the top cover. The conical surface of the top cover is the outer surface of the flanging; or, The angle between the generatrix of the conical surface of the top cover and the lower surface of the top cover is 26° - 61°.

4. The battery structure according to claim 2, characterized in that, The distance from the joint between the conical surface of the top cover and the surface of the first collar to the edge of the top cover is 0.03 - 0.5 mm.

5. The battery structure according to claim 2, characterized in that, A first strip-shaped groove is provided on the conical surface of the wedge-shaped structure. The first strip-shaped groove extends along the conical generatrix. The first tab is located in the first strip-shaped groove.

6. The battery structure according to claim 1, characterized in that, The connection position between the first tab and the electric core is the first position. The distance from the first position to the center of the electric core is greater than the distance from the first position to the edge of the electric core. The electric core is a wound electric core.

7. The battery structure according to claim 1, characterized in that, The first end of the second tab is connected to the lower cover. The second end of the second tab is connected to the electric core.

8. The battery structure according to claim 7, characterized in that, The lower cover includes a bottom cover and a second collar. The first end of the second tab is disposed at the joint between the bottom cover and the second collar; or, the first end of the second tab is disposed on the inner surface of the lower cover.

9. The battery structure according to claim 1, characterized in that, The adhesive layer is also disposed between the upper cover and the electric core and / or between the lower cover and the electric core.

10. An electronic device, characterized in that, The electronic device includes the battery structure according to any one of claims 1 - 9.

Images