Battery and electronic device

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 and a flexible circuit board. Wherein the flexible circuit board comprises a first board body part and a component, the first board body part is arranged at the top of the top sealing part, and one side of the first board body part is bent towards the bottom of the top sealing part to form a second board body part. According to the battery with the structure, the top sealing part is bent towards the top surface of the battery cell, a gap can be formed between the top sealing part and the top surface of the battery cell, the mounting space is defined by the upper part of the top sealing part and the side sealing part, the flexible circuit board is arranged in the mounting space, and the thickness of the flexible circuit board is smaller than that of a PCB (Printed Circuit Board); and the second plate body part of the flexible circuit board is positioned at the bottom of the top sealing part, so that the space occupied by the flexible circuit board at the top of the battery cell can be remarkably reduced, and the total length of the battery cell is reduced, so that the battery meets the small-size requirement of an electronic product.

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 consist of a cell and a circuit board. The circuit board is mounted on top of the cell, equipped with components and 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 create safety risks. As electronic devices increasingly demand more compact batteries, existing circuit boards occupy a significant amount of space on top of the cell, resulting in a longer overall battery length and making it difficult to meet the compact battery requirements of existing electronic devices. Utility Model Content

[0003] In view of this, the present invention provides a method for solving the problem that the circuit board of the battery in the prior art occupies a large space.

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

[0005] A battery cell, comprising an electrode group and a packaging member, wherein the electrode group is disposed in the packaging member; the packaging member comprises a top sealing portion and a side sealing portion, wherein the top sealing portion is bent toward the top surface of the battery cell, and a gap is formed between the top sealing portion and the top surface of the battery cell;

[0006] The flexible circuit board includes a first plate body and components, wherein the first plate body is arranged on the top of the top seal portion, and one side of the first plate body is bent toward the bottom of the top seal portion to form a second plate body; the first plate body is connected to the top surface of the top seal portion, and the second plate body is located in the gap.

[0007] Beneficial effects: In a battery with this structure, the top seal is bent toward the top surface of the battery cell, forming a gap between the top seal and the top surface of the battery cell, and an installation space is enclosed between the top of the top seal and the side seal. A flexible circuit board is arranged in the installation space. The thickness of the flexible circuit board is smaller than that of the PCB board, and the second plate body of the flexible circuit board is located at the bottom of the top seal. This can significantly reduce the space occupied by the flexible circuit board at the top of the battery cell, thereby reducing the overall length of the battery cell, so that the battery meets the small volume requirements of electronic products. The first plate body of the flexible circuit board is connected to the top seal. The gap between the top seal and the top surface of the battery cell provides installation space for the second plate body.

[0008] In an optional embodiment, a reinforcement member is further included, which is arranged on the bottom surface of the first plate body, the components are arranged on the top surface of the first plate body, and the reinforcement member is arranged on the top surface of the top sealing part.

[0009] Beneficial effects: The reinforcement is used to enhance the strength of the first board body so that the first board body can better support the components arranged on its top surface. At the same time, the reinforcement can improve the overall strength of the flexible circuit board.

[0010] In an optional embodiment, the reinforcement member is wrapped around the first insulating member.

[0011] Beneficial effect: The first insulating member plays an insulating and protective role, which can effectively prevent the conductive structure on the top of the battery from contacting and causing a short circuit, thereby effectively improving the safety performance of the battery.

[0012] In an optional embodiment, the first insulating member is bonded to the first plate portion and the top sealing portion;

[0013] And / or, the second plate portion is bonded to the bottom surface of the top sealing portion and the top surface of the battery cell.

[0014] Beneficial effect: The first insulating member is fixed to the first plate body and the top sealing portion simply and conveniently.

[0015] The top surface of the second plate body is bonded to the bottom surface of the top sealing part, and the bottom surface of the second plate body is bonded and fixed to the packaging on the top surface of the battery cell. Fixed points are set at the top and bottom of the second plate body at the same time, which is conducive to ensuring the stability of the overall structure of the flexible circuit board.

[0016] In an optional embodiment, the reinforcement member is attached to the top surface of the top sealing portion.

[0017] Beneficial effects: During the battery charging and discharging process, the heat generated by the components is conducted to the reinforcement through the first plate body, and then conducted to the top seal and the battery cell by the reinforcement, so that the heat can be effectively evenly distributed and dissipated through the packaging and the electrode group, which can effectively reduce the heat concentration phenomenon of the flexible circuit board. During the battery charging and discharging process, the heat dissipation effect of the components can be improved, thereby effectively improving the battery charging and discharging effect.

[0018] In an optional embodiment, a second insulating member is provided between the top sealing portion and the first plate portion.

[0019] Beneficial effect: the second insulating member further plays an insulating and isolating role between the first plate portion and the top sealing portion.

[0020] In an optional embodiment, the battery cell further includes a pole ear, which extends from the end of the top seal portion and bends toward the first plate portion, and the second insulating member is provided with a bending area on the side facing the pole ear that bends upward along with the pole ear.

[0021] Beneficial effect: The bending zone plays an insulating and protective role between the bending portion of the tab and the reinforcement.

[0022] In an optional embodiment, a relief hole is provided on the first plate body, the tab passes through the relief hole and bends upward to the top of the first plate body, and the tab is electrically connected to the first plate body.

[0023] Beneficial effect: An avoidance hole is opened on the flexible circuit board, which facilitates the tab to pass through the avoidance hole and then pass through the flexible bent short-circuit board to be electrically connected to the first board body.

[0024] In an optional embodiment, a connector is further included, and the connector is connected to the first plate body.

[0025] Beneficial effects: The connector is connected to the first board body, and the connector, flexible circuit board and components are integrated into one, with a compact structure, which can further reduce the overall volume of the battery.

[0026] In a second aspect, the present invention further provides an electronic device comprising any one of the above-mentioned batteries. The electronic device comprising the battery has the same technical effects as the battery, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 A schematic diagram of a battery according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged view of part A in the middle;

[0030] Figure 3 This is a schematic diagram of the cooperation between the flexible circuit board, the top seal, the reinforcement, and the second insulating member in a battery according to an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the cooperation between the tab, the reinforcement, the second insulating member and the top seal portion in a battery according to an embodiment of the present utility model;

[0032] Figure 5 This is an exploded view of a battery according to an embodiment of the present utility model;

[0033] Figure 6This is an exploded view of a flexible circuit board, a reinforcement member, and a first insulating member in a battery according to an embodiment of the present utility model;

[0034] Figure 7 This is a schematic diagram of a second insulating member in a battery according to an embodiment of the present utility model.

[0035] Description of reference numerals:

[0036] 1. Battery cell; 11. Package; 111. Top seal; 12. Tab; 2. Flexible circuit board; 21. First board body; 211. Avoidance hole; 22. Components; 23. Second board body; 3. Reinforcement; 4. First insulating member; 5. Second insulating member; 51. Bending area; 6. Connector; 7. Top package. DETAILED DESCRIPTION

[0037] 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.

[0038] like Figure 5 As shown, the left and right directions in the figure are the width directions of the battery and the battery cell 1. Figure 5 The up-down direction is the length direction of the battery and the battery cell 1 , and the direction perpendicular to the plane surrounded by the long side and the wide side of the battery is the thickness direction of the battery and the battery cell 1 .

[0039] The circuit board of the battery in the related art is a PCB board, which is a hard circuit board with a relatively thick thickness. The PCB board is arranged at the top of the battery cell 1 in the length direction. The PCB board occupies a large space on the top of the battery cell 1, resulting in a longer overall length of the battery, which is difficult to meet the requirements of existing electronic devices for a small battery volume.

[0040] The following combination Figures 1 to 7 , describing the embodiments of the present utility model.

[0041] According to an embodiment of the present invention, in one aspect, a battery is provided, comprising a cell 1 and a flexible circuit board. The cell 1 comprises an electrode group and a packaging member 11, wherein the electrode group is disposed within the packaging member 11; the packaging member 11 comprises a top seal 111 and side seals, wherein the top seal 111 is bent toward the top surface of the cell 1 and spaced apart from the top surface of the cell 1; the flexible circuit board comprises a first plate portion 21 and components 22, wherein the first plate portion 21 is disposed on top of the top seal 111, and one side of the first plate portion 21 is bent toward the bottom of the top seal 111 to form a second plate portion 23; the first plate portion 21 is connected to the top surface of the top seal 111, and the second plate portion 23 is located in the gap between the top seal 111 and the top surface of the cell 1.

[0042] In this battery structure, the top seal 111 bends toward the top surface of the cell 1, creating a gap between the top seal and the top surface of the cell. Furthermore, an installation space is defined between the top of the top seal 111 and the side seals. A flexible circuit board (FPCB) is placed within this installation space. The FPCB's second body 23 is located at the bottom of the top seal 111, significantly reducing the space occupied by the FPCB at the top of the cell 1 and the overall length of the cell, enabling the battery to meet the compact size requirements of electronic products. The FPCB's first body 21 is connected to the top seal 111, and the gap between the top seal and the top surface of the cell provides mounting space for the second body.

[0043] The current-carrying capacity of a flexible circuit board is positively correlated with its width and thickness. By providing a second board portion, the overall width of the flexible circuit board is increased, thereby improving the current-carrying capacity of the flexible circuit board. This increase in width allows the thickness of the flexible circuit board to be appropriately reduced, further reducing the space occupied by the flexible circuit board on top of the battery cell and reducing the overall length of the battery cell. Furthermore, the increased width of the flexible circuit board improves its heat dissipation, ensuring that it meets heat dissipation requirements.

[0044] like Figure 3 、 Figure 4 and Figure 6 As shown, the battery also includes a reinforcement member 3, which is arranged on the bottom surface of the first plate body 21, the components 22 are arranged on the top surface of the first plate body 21, and the reinforcement member 3 is arranged on the top surface of the top seal portion 111. The reinforcement member 3 is used to enhance the strength of the first plate body 21 so that the first plate body 21 can better support the components 22 arranged on its top surface. At the same time, the reinforcement member 3 can improve the overall strength of the flexible circuit board. It should be noted that the "bottom surface" mentioned in the embodiments of the present application is the side facing downward (toward the top surface of the battery cell), and the "top surface" is the side facing upward (away from the top surface of the battery cell).

[0045] Optionally, in some embodiments, the reinforcement member 3 includes a steel sheet, and the steel sheet is disposed on the bottom surface of the first plate portion 21 .

[0046] In some embodiments, as Figure 6 As shown, the reinforcement 3 is wrapped with the first insulating member 4, and the first insulating member 4 plays an insulating protection role, which can effectively prevent the conductive structure on the top of the battery from contacting and causing a short circuit, thereby effectively improving the safety performance of the battery.

[0047] Optionally, the first insulating member 4 includes an insulating film, and the insulating film is wrapped and covered on the outside of the reinforcement member 3 .

[0048] In some embodiments, the first insulating member 4 is bonded to the first plate portion 21 and the top seal portion 111, and the first insulating member 4 is easily and conveniently secured to the first plate portion 21 and the top seal portion 111. After bonding, an adhesive layer is provided on the exterior of the first insulating member 4 to securely secure the first insulating member 4 to the top seal portion 111 and the first plate portion 21.

[0049] In some embodiments, the second plate body 23 is bonded to the bottom surface of the top seal 111 and the top surface of the battery cell 1, and the second plate body 23 is easy to fix; the top surface of the second plate body 23 is bonded to the bottom surface of the top seal 111, and the bottom surface of the second plate body 23 is bonded and fixed to the package 11 on the top surface of the battery cell 1. The top and bottom of the second plate body 23 are fixed at the same time, which is conducive to ensuring the stability of the overall structure of the flexible circuit board. Figure 3 As shown, after bonding, glue layers are formed between the second plate portion 23 and the top sealing portion 111 , and between the second plate portion 23 and the top surface of the battery cell 1 .

[0050] In other embodiments, the second plate portion 23 may also be fixed to the top sealing portion 111 and the top surface of the battery cell 1 by bonding with double-sided adhesive.

[0051] like Figure 3 and Figure 4 As shown, in some embodiments, the reinforcement member 3 is attached to the top surface of the top seal portion 111, which is in turn attached to the bottom surface of the first plate portion 21, and the components 22 are arranged on the top surface of the first plate portion 21. During the battery charging and discharging process, the heat generated by the components 22 is transferred through the first plate portion 21 to the reinforcement member 3, and then from the reinforcement member 3 to the top seal portion 111 and the battery cell 1. This allows for effective heat distribution and dissipation through the packaging member 11 and the electrode assembly, effectively reducing heat concentration in the flexible circuit board and improving the heat dissipation effect of the components 22 during the battery charging and discharging process, thereby effectively improving the battery's charging and discharging performance.

[0052] like Figures 3 to 5As shown, in some embodiments, a second insulating member 5 is provided between the top seal portion 111 and the first plate portion 21 to further provide insulation between the first plate portion 21 and the top seal portion 111. Preferably, along the width direction of the battery, both ends of the second insulating member 5 extend beyond both ends of the reinforcement member 3 so that the second insulating member 5 fully covers the top surface of the top seal portion 111, ensuring insulation.

[0053] Optionally, in some embodiments, the second insulating member 5 comprises insulating tape, which can be conveniently and quickly bonded directly to the top surface of the top seal 111. The reinforcement member 3 is bonded to the top surface of the second insulating member 5 and indirectly bonded to the top seal 111 through the second insulating member 5. The thin insulating tape facilitates heat transfer from the first plate portion 21 to the top seal 111.

[0054] like Figure 4 and Figure 7 As shown, the battery cell 1 further includes a tab 12, which extends from the end of the top seal portion 111 and bends toward the first plate portion 21. The second insulating member 5 has a bending region 51 on one side facing the tab 12, which bends upward along with the tab 12. The bending region 51 provides insulation protection between the bent portion of the tab 12 and the reinforcement member 3.

[0055] like Figure 6 As shown, the first plate portion 21 is provided with an escape hole 211, through which the tab 12 passes and bends upward to the top of the first plate portion 21, electrically connecting the tab 12 to the first plate portion 21. The escape hole 211 is provided on the flexible printed circuit board to facilitate the tab 12 passing through the escape hole 211 and then passing through the flexible bending short-circuit board to electrically connect to the first plate portion 21.

[0056] like Figures 2 to 4 As shown, the bent plane of the top seal 111 is parallel to the top surface of the battery cell 1 and is located below the top surface of the side seal. The tab 12 extends horizontally from the end of the top seal 111 for a distance and then bends upward. The tab 12 then bends toward the top of the first plate portion 21 and is electrically connected to the first plate portion 21.

[0057] Optionally, a nickel sheet is provided on the top surface of the first plate portion 21 , and the bent portion at the top of the tab 12 is welded to the nickel sheet.

[0058] like Figure 1 and Figure 2 As shown, the tabs 12 include a positive tab and a negative tab, which are arranged on the same side of the battery cell 1 in the longitudinal direction and spaced apart from each other along the width direction of the battery cell 1. Accordingly, two avoidance holes 211 are provided on the first plate portion 21, and the two avoidance holes 211 are respectively provided for the positive tab and the negative tab to pass through.

[0059] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the battery further includes a connector 6, which is connected to the first board portion 21. The connector 6, the flexible circuit board and the components 22 are integrated into one, and the structure is compact, which can further reduce the overall volume of the battery.

[0060] Optionally, in one embodiment, the length of the flexible circuit board extends along the width of the battery cell 1, and connectors 6 are provided at both ends of the lengthwise direction of the flexible circuit board. A bent plate segment is provided at each end of the lengthwise direction of the first plate body 21. The bent plate segment bends horizontally toward the outside of the first plate body 21 for a distance, then bends upward. The bent plate segment then extends horizontally toward the first plate body 21 for a distance before connecting to the connector 6.

[0061] like Figure 5 As shown, the battery further includes a top package 7 , which is packaged at the head of the battery cell 1 , and the top package 7 is exposed outside the bent plate segment and the connector 6 .

[0062] Optionally, in some embodiments, the top package 7 is encapsulated by injection molding.

[0063] In other embodiments, the top package 7 may also be packaged by a soft package structure.

[0064] Optionally, in some embodiments, the battery includes a soft-pack battery, and the packaging member 11 includes an aluminum-plastic film.

[0065] According to another aspect of an embodiment of the present invention, an electronic device is provided, comprising the above-mentioned battery.

[0066] In an electronic device of this structure, a flexible circuit board is arranged in the installation space at the top of the battery cell 1. The thickness of the flexible circuit board is smaller than that of the PCB board, and the second board body 23 of the flexible circuit board is located at the bottom of the top sealing portion 111. This can significantly reduce the space occupied by the flexible circuit board at the top of the battery cell 1, thereby reducing the overall length of the battery cell 1, so that the battery meets the small volume requirements of the electronic device.

[0067] Optionally, the electronic devices include mobile phones, notebooks, power tools, and the like.

[0068] 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 and a packaging member (11), wherein the pole group is arranged in the packaging member (11); the packaging member (11) comprises a top sealing portion (111) and a side sealing portion, wherein the top sealing portion (111) is bent toward the top surface of the battery cell (1), and a gap is formed between the top sealing portion (111) and the top surface of the battery cell (1); A flexible circuit board comprises a first board body (21) and components (22), wherein the first board body (21) is arranged on the top of the top sealing portion (111), and one side of the first board body (21) is bent toward the bottom of the top sealing portion (111) to form a second board body (23); the first board body (21) is connected to the top surface of the top sealing portion (111), and the second board body (23) is located in the gap.

2. The battery according to claim 1, characterized in that It also includes a reinforcement member (3), the reinforcement member (3) is arranged on the bottom surface of the first plate body (21), the component (22) is arranged on the top surface of the first plate body (21), and the reinforcement member (3) is arranged on the top surface of the top sealing portion (111).

3. The battery according to claim 2, characterized in that The reinforcing member (3) is wrapped with the first insulating member (4).

4. The battery according to claim 3, characterized in that The first insulating member (4) is bonded to the first plate portion (21) and the top sealing portion (111); And / or, the second plate portion (23) is bonded to the bottom surface of the top sealing portion (111) and the top surface of the battery cell (1).

5. The battery according to any one of claims 2 to 4, characterized in that The reinforcement member (3) is attached to the top surface of the top sealing portion (111).

6. The battery according to claim 5, characterized in that A second insulating member (5) is provided between the top sealing portion (111) and the first plate portion (21).

7. The battery according to claim 6, characterized in that The battery cell (1) further includes a tab (12), the tab (12) extending from the end of the top seal portion (111) and bent toward the first plate portion (21), and a bending area (51) is provided on a side of the second insulating member (5) facing the tab (12) and bent upward along with the tab (12).

8. The battery according to claim 7, characterized in that The first plate body (21) is provided with an avoidance hole (211), the pole lug (12) passes through the avoidance hole (211) and is bent upward to the top of the first plate body (21), and the pole lug (12) is electrically connected to the first plate body (21).

9. The battery according to any one of claims 1 to 4, characterized in that It also includes a connector (6), and the connector (6) is connected to the first plate body (21).

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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