Battery and electronic equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and electronic equipment, and the battery comprises a battery cell, a flexible circuit board and a heat conduction connecting piece, the battery cell comprises a pole group, a pole lug and a packaging piece; the flexible circuit board is arranged in the accommodating space; according to the structure, the battery, the top sealing part, the edge folding part and the top surface of the pole group enclose the accommodating space, and the flexible circuit board is arranged in the accommodating space, so that the accommodating space at the top of the battery cell is fully utilized, the space outside the battery cell occupied by the flexible circuit board is reduced, the space occupied by the flexible circuit board at the top of the battery cell can be effectively reduced, and the service life of the battery cell is prolonged. The overall length of the battery is reduced, so that the volume of the battery is effectively reduced, and the small-volume requirement of an electronic product on the battery is met; and when the component works and emits heat, the heat conduction connecting piece can transfer heat on the component to the packaging piece and the pole group, and the heat dissipation effect on the component can be improved in the charging and discharging process of the battery, so that the charging and discharging effect of the battery is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and an electronic device. Background Art

[0002] Batteries used in some electronic devices include a cell and a circuit board. The circuit board is mounted on top of the cell and is equipped with components. The circuit board is electrically connected to the cell's tabs. The circuit board manages the battery's charge and discharge, ensuring it operates within a safe range to prevent overcharging, overdischarging, overheating, and other potential hazards that could damage the battery or cause safety risks. While electronic devices are increasingly demanding more compact batteries, existing circuit boards occupy a large amount of space on top of the cell, resulting in a longer overall battery length and making it difficult to meet the battery volume requirements of existing electronic devices. Utility Model Content

[0003] In view of this, the present invention provides a battery and an electronic device to solve the problem in the prior art that the circuit board of the battery occupies a large space.

[0004] In a first aspect, the present invention provides a battery, comprising:

[0005] A battery cell comprises an electrode group, a electrode tab, and a packaging member, wherein the electrode group is arranged in the packaging member, and one end of the electrode tab is electrically connected to the electrode group; the top of the packaging member is higher than the top surface of the electrode group to form a top seal portion, the packaging member on both sides of the electrode group in the width direction exceeds the outer edge of the electrode group, and the portion of the packaging member exceeding the outer edge of the electrode group is bent toward the side wall of the electrode group to form a folded portion, and the top seal portion, the folded portion, and the top surface of the electrode group enclose an accommodation space;

[0006] A flexible circuit board is arranged in the accommodating space, and the flexible circuit board includes a board body and components; the other end of the tab is electrically connected to the flexible circuit board;

[0007] A heat-conducting connector has one side connected to the top sealing portion facing the accommodating space and the other side attached to the component; when the component generates heat, the heat-conducting connector conducts the heat on the component to the top sealing portion.

[0008] Beneficial effects: In a battery of this structure, an accommodating space is formed between the top seal, the folded edge and the top surface of the electrode group, and the flexible circuit board is arranged in the accommodating space to make full use of the accommodating space on the top of the battery cell and reduce the space outside the battery cell occupied by the flexible circuit board. This can effectively reduce the space occupied by the flexible circuit board on the top of the battery cell and reduce the overall length of the battery, thereby effectively reducing the volume of the battery to meet the small volume requirements of electronic products for batteries; the thickness of the flexible circuit board is thinner than that of the rigid PCB board and occupies less space. At the same time, the flexible circuit board can meet the flexible connection requirements of electronic products; and when the components generate heat during operation, the thermal conductive connector connects the components and the top seal, which can conduct the heat on the components to the top seal, and then transfer the heat to the packaging and the electrode group, which can improve the heat dissipation effect of the components during the battery charging and discharging process, thereby effectively improving the charging and discharging effect of the battery.

[0009] In an optional embodiment, the top seal portion extends from one side of the top surface in the thickness direction; the components are arranged on the side surface of one side of the plate body in the thickness direction, and the flexible circuit board is located on the inner side of the top surface of the pole group in the thickness direction.

[0010] Beneficial effect: The top seal is located on one side of the electrode group in the thickness direction, which can effectively expand the width of the accommodating space in the thickness direction of the battery, so that the flexible circuit board is completely located inside the battery cell in the width direction of the accommodating space, effectively preventing the flexible circuit board from exceeding the edge of the battery cell in the thickness direction, thereby making the overall structure of the battery more compact and reducing the space occupied by the battery.

[0011] In an optional embodiment, two sides of the thermally conductive connector are respectively bonded to a side of the top sealing portion facing the accommodating space and the component.

[0012] Beneficial effects: The connection structure between the top sealing part of the heat-conducting connector and the components is simple and convenient to connect.

[0013] In an optional embodiment, the thermally conductive connecting member includes a thermally conductive gel layer.

[0014] Beneficial effects: The thermally conductive gel layer has good viscosity and softness, and can play a buffering and protective role between the top seal part and the flexible circuit board while bonding the top seal part and the components; at the same time, the thermally conductive gel layer has good heat dissipation effect and excellent insulation properties.

[0015] In an optional embodiment, the Shore hardness of the thermally conductive gel layer is 30 degrees to 50 degrees.

[0016] In an optional embodiment, the thermally conductive gel layer is an integral structure, and the length direction of the thermally conductive gel layer extends along the width direction of the electrode group.

[0017] Beneficial Effects: Connecting multiple components through a single thermally conductive gel layer creates a simple and convenient connection structure, which helps improve battery production efficiency. Furthermore, the thermally conductive gel layer is a single, integrated structure, providing excellent thermal conductivity, insulation, and buffering properties.

[0018] In an optional embodiment, the tab extends from the top of the top seal portion and is bent toward the flexible circuit board and is electrically connected to the board body.

[0019] In an optional embodiment, a conductive member is further included, which is fixed on a side of the flexible circuit board facing the top seal portion, and a side of the tab bent toward the flexible circuit board is electrically connected to the conductive member.

[0020] In an optional embodiment, a relief groove is provided on the top of the thermally conductive connector, and the tab is bent through the relief groove to cross the thermally conductive connector.

[0021] Beneficial effect: The avoidance groove is provided to enable the heat-conducting connector to avoid the tab; in addition, when the tab is subjected to external force, the tab is pressed downward and deformed, and the avoidance groove provides space for the tab to deform toward the top surface of the pole group.

[0022] In a second aspect, the present invention further provides an electronic device comprising any one of the batteries described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of a battery according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the top of a battery according to an embodiment of the present invention from a first angle;

[0026] Figure 3 A schematic diagram of the top of a battery according to an embodiment of the present invention from a second angle;

[0027] Figure 4 This is a schematic diagram of the coordination of a thermally conductive connector, a tab, and a conductive member in a battery according to an embodiment of the present utility model;

[0028] Figure 5 This is an exploded view of a battery according to an embodiment of the present utility model;

[0029] Figure 6 This is an exploded view of a battery according to an embodiment of the present utility model;

[0030] Figure 7 for Figure 1 Schematic diagram of the thermally conductive connector.

[0031] Description of reference numerals:

[0032] 1. Battery cell; 11. Tab; 12. Package; 121. Top seal; 122. Folding edge; 2. Flexible circuit board; 21. Board body; 22. Components; 23. Connector; 3. Thermal connector; 31. Avoidance groove; 4. Conductive part. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0034] The circuit board of a battery in the related art is a PCB, which is a relatively thick rigid circuit board. The PCB is placed on top of the battery cell 1, occupying a large amount of space there. This results in a longer overall battery length, making it difficult to meet the battery volume requirements of existing electronic devices. Furthermore, the rigid PCB cannot meet the flexible connection requirements of electronic products.

[0035] The following combination Figures 1 to 7 , describing the embodiments of the present utility model.

[0036] like Figure 5 As shown, the left and right directions in the figure are the width directions of the battery. Figure 5 The vertical direction is the length of the battery, and the direction perpendicular to the plane bounded by the long and wide sides of the battery is the thickness of the battery. The width of the electrode group is the same as the width of the battery, the length of the electrode group is the same as the length of the battery, and the thickness of the electrode group is the same as the thickness of the battery.

[0037] According to an embodiment of the present invention, on one hand, a battery is provided, including a battery cell 1 , a flexible circuit board 2 and a thermally conductive connector 3 .

[0038] The battery cell 1 includes an electrode group, a tab 11 and a packaging member 12. The electrode group is arranged in the packaging member 12, and one end of the tab 11 is electrically connected to the electrode group. The top of the packaging member 12 is higher than the top surface of the electrode group to form a top seal portion 121. The packaging member 12 on both sides in the width direction of the electrode group exceeds the outer edge of the electrode group. The portion of the packaging member 12 exceeding the outer edge of the electrode group is bent toward the side wall of the electrode group to form a folded edge portion 122. The top seal portion 121, the folded edge portion 122 and the top surface of the electrode group enclose an accommodating space. The flexible circuit board 2 is arranged in the accommodating space. The flexible circuit board 2 includes a board body 21 and a component 22. The other end of the tab 11 is electrically connected to the flexible circuit board 2. One side of the thermal connector 3 is connected to the side of the top seal portion 121 facing the accommodating space, and the other side is bonded to the component 22. The thermal connector 3 connects the component 22 and the top seal portion 121. When the component 22 generates heat, the thermal connector 3 transfers the heat from the component 22 to the top seal portion 121.

[0039] In a battery of this structure, an accommodating space is formed between the top sealing portion 121, the folded edge portion 122 and the top surface of the electrode group, and the flexible circuit board 2 is arranged in the accommodating space to fully utilize the accommodating space on the top of the battery cell 1 and reduce the space outside the battery cell 1 occupied by the flexible circuit board 2. This can effectively reduce the space occupied by the flexible circuit board 2 on the top of the battery cell 1 and reduce the overall length of the battery, thereby effectively reducing the volume of the battery to meet the small volume requirements of electronic products. The thickness of the flexible circuit board 2 is thinner than that of a rigid PCB board and occupies less space. At the same time, the flexible circuit board 2 can meet the flexible connection requirements of electronic products. When the component 22 generates heat during operation, the thermal connector 3 connects the component 22 and the top sealing portion 121, which can conduct the heat on the component 22 to the top sealing portion 121, and then transfer the heat to the package 12 and the electrode group. During the charging and discharging process of the battery, the heat dissipation effect of the component 22 can be improved, thereby effectively improving the charging and discharging effect of the battery.

[0040] like Figure 2 and Figure 3 As shown, in some embodiments, the top seal portion 121 extends from one side of the top surface of the electrode assembly in the thickness direction, that is, the top seal portion 121 is positioned toward the side of the electrode assembly in the thickness direction; the components 22 are positioned on the side surface of the body portion 21 in the thickness direction, and the flexible circuit board 2 is positioned inward of the top surface of the electrode assembly in the thickness direction. Positioning the top seal portion 121 toward the side of the electrode assembly in the thickness direction effectively expands the width of the accommodation space in the thickness direction of the battery, allowing the flexible circuit board 2 to be entirely located within the battery cell 1 in the width direction of the accommodation space, effectively preventing the flexible circuit board 2 from extending beyond the edge of the battery cell 1 in the thickness direction. This makes the overall battery structure more compact and reduces the battery's footprint.

[0041] The electrode group is arranged in the packaging member 12. The portion of the packaging member 12 that exceeds the outer edge of the electrode group is packaged to form a top sealing portion 121 and packaging areas on both sides of the electrode group width direction. The packaging areas are bent toward the sides of the electrode group to form folded edges 122.

[0042] like Figure 2 and Figure 3 In some embodiments, the two sides of the thermal conductive connector 3 are respectively bonded to the side of the top sealing portion 121 facing the accommodating space and the component 22. The connection structure of the top sealing portion 121 of the thermal conductive connector 3 and the component 22 is simple and easy to connect.

[0043] For example, in some embodiments, the thermally conductive connector 3 includes a thermally conductive gel layer, and the two sides of the thermally conductive gel layer are respectively adhered to the top seal portion 121 and the component 22. The thermally conductive gel layer has good viscosity and softness, and can play a buffering and protective role between the top seal portion 121 and the flexible circuit board 2 while bonding the top seal portion 121 and the component 22. At the same time, the thermally conductive gel layer has a good heat dissipation effect and excellent insulation properties.

[0044] Optionally, in some embodiments, the Shore hardness of the thermally conductive gel layer is 30 degrees to 50 degrees. The thermally conductive gel layer has good flexibility and can adapt to the deformation of the flexible circuit board 2 when the battery is subjected to external force, and has deformation adaptability.

[0045] In other embodiments, the thermal connector 3 may further include a thermally conductive silicone layer, or any thermally conductive material, with double-sided tape pasted on both sides of the thermally conductive material, and the thermally conductive material is bonded to the top sealing portion 121 and the component 22 through the double-sided tape.

[0046] like Figure 6 As shown, a plurality of components 22 of different sizes are provided on the plate body 21 , and different components 22 are used to realize different functions of the battery.

[0047] Alternatively, as Figures 2 to 7 As shown, in some embodiments, the thermally conductive gel layer is a monolithic structure, with its length extending along the width of the electrode assembly. Multiple components 22 are connected via a single, monolithic thermally conductive gel layer, resulting in a simple and convenient connection structure that improves battery production efficiency. Furthermore, the monolithic thermally conductive gel layer provides excellent thermal conductivity, insulation, and buffering properties.

[0048] Different components 22 on the plate body 21 generate different amounts of heat and have different thicknesses. The thermally conductive gel layer is bonded to the components 22 with the larger amount of heat, thereby ensuring the heat dissipation effect of the components 22 with the larger amount of heat.

[0049] In other embodiments, a thermally conductive gel layer may be provided on each of the different components 22 , and the thermally conductive gel layer may be provided corresponding to the component 22 with the largest heat generation to ensure the heat dissipation effect of the component 22 with the largest heat generation.

[0050] Optionally, the component 22 is fixed to the plate body 21 by welding a nickel sheet.

[0051] like Figure 3 As shown, one end of the flexible circuit board 2 is bent outwardly toward the top sealing portion 121 to form a bent plate segment, and the bent plate is connected to the connector 23. The connector 23, the component 22 and the flexible circuit board 2 are integrated, which can effectively reduce the space occupied by the overall structure and make the overall structure of the battery more compact.

[0052] like Figure 3 and Figure 4 As shown, in some embodiments, the tab 11 extends from the top of the top seal portion 121 and bends toward the flexible circuit board 2 to be electrically connected to the board body 21. The bent tab 11 is electrically connected to the board body 21, which can reduce the length of the battery compared to a method in which the tab 11 extends vertically after extending from the top seal portion 121.

[0053] like Figure 4 As shown, in some embodiments, the battery further includes a conductive member 4 , which is fixed on the side of the flexible circuit board 2 facing the top seal portion 121 , and the side of the tab 11 bent toward the flexible circuit board 2 is electrically connected to the conductive member 4 .

[0054] Optionally, the conductive member 4 is welded to the plate body 21 , and the tab 11 is welded to the conductive member 4 .

[0055] like Figure 4 As shown, in some embodiments, the longitudinal cross-section of the conductive member 4 is U-shaped, and the conductive member 4 includes two planar portions and a bent surface connecting the two planar portions. One planar portion is welded and fixed to the plate body portion 21, and the side of the tab 11 bent toward the flexible circuit board 2 extends between the two planar portions and is welded to the planar portion on the side close to the top seal portion 121.

[0056] An avoidance groove 31 is provided at the top of the thermally conductive connector 3, and the tab 11 bends across the thermally conductive connector 3 through the avoidance groove 31. The avoidance groove 31 is provided to allow the thermally conductive connector 3 to avoid the tab 11; in addition, when the tab 11 is subjected to external force, the tab 11 is pressed downward and deformed, and the avoidance groove 31 provides space for the tab 11 to deform toward the top surface of the pole group.

[0057] Optionally, in some embodiments, the tabs 11 include a positive tab and a negative tab, such as Figure 5 and Figure 6As shown, both the positive and negative electrode tabs are located at the top of the electrode assembly, and are spaced apart along the width of the battery. Accordingly, two conductive members 4 are provided, one corresponding to each positive and negative electrode tab.

[0058] Optionally, in some embodiments, the battery includes a soft-pack battery, and the packaging member 12 includes an aluminum-plastic film, which is packaged outside the electrode group.

[0059] According to another aspect of an embodiment of the present invention, an electronic device is provided, comprising the above-mentioned battery.

[0060] In an electronic device of this structure, the flexible circuit board 2 is arranged in the accommodating space, which can effectively reduce the space occupied by the flexible circuit board 2 on the top of the battery cell 1 and reduce the overall length of the battery, thereby effectively reducing the volume of the battery to meet the small volume requirements of the electronic device; at the same time, the flexible circuit board 2 can meet the flexible connection requirements of the electronic device; and when the component 22 generates heat during operation, the thermal conductive connector 3 can transfer the heat on the component 22 to the package 12 and the electrode group, which can improve the heat dissipation effect of the component 22 during the battery charging and discharging process, thereby effectively improving the service life of the electronic device.

[0061] Optionally, the electronic devices include mobile phones, notebooks, power tools, and the like.

[0062] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that: include: A battery cell (1) comprises a pole group, a pole tab (11) and a packaging member (12), wherein the pole group is arranged in the packaging member (12), and one end of the pole tab (11) is electrically connected to the pole group; the top of the packaging member (12) is higher than the top surface of the pole group to form a top seal portion (121); the packaging member (12) on both sides in the width direction of the pole group exceeds the outer edge of the pole group; the portion of the packaging member (12) exceeding the outer edge of the pole group is bent toward the side wall of the pole group to form a folded edge portion (122); and an accommodating space is enclosed between the top seal portion (121), the folded edge portion (122) and the top surface of the pole group; A flexible circuit board (2) is arranged in the accommodating space, and the flexible circuit board (2) comprises a board body (21) and components (22); the other end of the tab (11) is electrically connected to the flexible circuit board (2); A heat-conducting connector (3) has one side connected to the top-sealing portion (121) facing the accommodating space and the other side attached to the component (22); when the component (22) generates heat, the heat-conducting connector (3) conducts the heat on the component (22) to the top-sealing portion (121).

2. The battery according to claim 1, characterized in that The top sealing portion (121) extends from one side of the top surface in the thickness direction; the components (22) are arranged on the side surface of one side of the plate body portion (21) in the thickness direction, and the flexible circuit board (2) is located on the inner side of the top surface of the electrode group in the thickness direction.

3. The battery according to claim 1 or 2, characterized in that The two sides of the heat-conducting connector (3) are respectively bonded to one side of the top sealing portion (121) facing the accommodating space and the component (22).

4. The battery according to claim 3, characterized in that The heat-conducting connecting piece (3) comprises a heat-conducting gel layer.

5. The battery according to claim 4, characterized in that The Shore hardness of the thermally conductive gel layer is 30 degrees to 50 degrees.

6. The battery according to claim 4, characterized in that The thermally conductive gel layer is an integral structure, and the length direction of the thermally conductive gel layer extends along the width direction of the electrode group.

7. The battery according to claim 1 or 2, characterized in that The tab (11) extends from the top of the top seal portion (121), bends toward the flexible circuit board (2), and is electrically connected to the board body portion (21).

8. The battery according to claim 7, characterized in that It also includes a conductive member (4), which is fixed on a surface of the flexible circuit board (2) facing the top seal portion (121), and a side of the tab (11) bent toward the flexible circuit board (2) is electrically connected to the conductive member (4).

9. The battery according to claim 7, characterized in that A relief groove (31) is provided on the top of the heat-conducting connector (3), and the tab (11) is bent through the relief groove (31) to cross the heat-conducting connector (3).

10. An electronic device, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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