Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment. The battery comprises a circuit board, a battery cell and a pressing mechanism, the circuit board is provided with a power connection part. The battery cell comprises a tab. And the circuit board and the battery cell are arranged in the shell. And the pressing mechanism presses the tab and the power connection part, so that the circuit board is electrically connected with the battery cell. Therefore, according to the embodiment of the invention, the tabs of the battery cell and the power connection part of the circuit board can be pressed through the pressing mechanism, so that the battery cell is electrically connected with the circuit board, the connection process of the battery cell and the circuit board is simplified, the connection process of the battery cell and the circuit board is relatively simple, and the production cost is relatively low.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery and an electrical device. Background Art

[0002] In the related art, the connection between the battery cell and the circuit board is generally achieved by laser welding. However, during the laser welding process, problems such as fewer solder joints, explosion, blackening, de-soldering, false soldering, and solder penetration are likely to occur. Therefore, after the laser welding is completed, the welded joints need to be inspected, resulting in a more complex process and higher production cost when connecting the battery cell and the circuit board. Summary of the Utility Model

[0003] In view of this, the present utility model aims to solve at least one of the problems in the related art to some extent. For this purpose, the purpose of the present utility model is to provide a battery and an electrical device.

[0004] This application provides a battery. The battery includes a circuit board, a battery cell, and a pressing mechanism. The circuit board is provided with a power connection part. The battery cell includes a tab; the pressing mechanism presses the tab against the power connection part to electrically connect the circuit board and the battery cell.

[0005] In some embodiments, the power connection part includes a conductive layer, and the pressing mechanism presses the tab against the conductive layer to electrically connect the battery cell and the circuit board.

[0006] In some embodiments. A through hole is further provided on the power connection part. The conductive layer is provided on the periphery and the hole wall of the through hole. The tab includes a main body and at least one connecting piece. The pressing mechanism passes through the through hole. The pressing mechanism presses the main body against the conductive layer provided on the periphery of the through hole, and presses the connecting piece against the conductive layer provided on the hole wall.

[0007] In some embodiments, the main body is formed with a through hole aligned with the through hole. The connecting piece is arranged at the edge of the through hole. The pressing mechanism passes through the through hole and the through hole. The pressing mechanism presses the main body against the conductive layer provided on the periphery of the through hole, and presses the connecting piece against the conductive layer provided on the hole wall.

[0008] In some embodiments, the battery further includes a housing. The circuit board and the battery cell are both arranged in the housing. The pressing mechanism is arranged in the housing, and the pressing mechanism presses the tab against the power connection part.

[0009] In some embodiments, the housing includes a frame and a cover plate covering the frame. The pressing mechanism includes a column provided on the cover plate corresponding to the through hole and a convex portion provided on the frame and cooperating with the column. The column passes through the through hole and the through hole to be connected to the convex portion, and the column and the convex portion cooperate to press the connecting piece against the conductive layer provided on the hole wall.

[0010] In some embodiments, the column is a hollow column, and the convex portion passes through the hollow column to expand the hollow column, so as to press the connecting piece against the conductive layer provided on the hole wall.

[0011] In some embodiments, the column includes a hollow column body and a plurality of elastic pieces arranged at intervals along the circumferential direction of the column. The plurality of elastic pieces are connected to one end of the hollow column body close to the convex portion, and the convex portion applies a pressing force to the elastic pieces so that the elastic pieces press the connecting piece against the conductive layer provided on the hole wall.

[0012] In some embodiments, a clamping portion is provided on the outer peripheral wall of the column, and the clamping portion is clamped with the circumferential side surface of the through hole close to the frame.

[0013] In some embodiments, a draft angle is provided on the circumferential side of the convex portion.

[0014] In some embodiments, the pressing mechanism further includes a pressing ring. The pressing ring is provided between the cover plate and the tab of the battery cell, and presses the main body against the conductive layer provided on the circumferential side of the through hole.

[0015] This application also provides an electrical device. The electrical device includes the battery according to any of the above embodiments.

[0016] The battery and the electrical device according to the embodiments of this application can press the tab of the battery cell against the power connection portion of the circuit board through the pressing mechanism, realizing the electrical connection between the battery cell and the circuit board, simplifying the connection process between the battery cell and the circuit board, making the connection process between the battery cell and the circuit board relatively simple, and having a lower production cost.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, wherein:

[0019] Figure 1It is a schematic structural diagram of the battery according to the embodiment of the present application;

[0020] Figure 2 is Figure 1 an explosion schematic diagram of the battery;

[0021] Figure 3 It is an enlarged partial structural cross-sectional view of the battery according to the embodiment of the present application;

[0022] Figure 4 It is an enlarged partial structural view of the circuit board according to the embodiment of the present application;

[0023] Figure 5 It is an enlarged structural view of the tab according to the embodiment of the present application;

[0024] Figure 6 It is a schematic structural diagram of the connection between the tab and the power connection part according to the embodiment of the present application;

[0025] Figure 7 is Figure 2 an enlarged partial structural view of the battery;

[0026] Figure 8 It is an enlarged partial structural view of the cover plate according to the embodiment of the present application;

[0027] Figure 9 It is an enlarged partial structural view of the frame according to the embodiment of the present application.

[0028] Main element reference numerals:

[0029] Battery 100;

[0030] Circuit board 10; Power connection part 11; Conductive layer 111; Through hole 113, Hole wall 1131; Battery cell 30; Tab 31; Main body 311, Through hole 3111; Connection piece 313; Housing 50, Frame 51, Cover plate 53; Pressing mechanism 70; Column 71, Clamping part 711, Hollow column 712, Elastic piece 713; Protrusion 73, Draft angle 731; Pressing ring 75. Specific embodiments

[0031] The following is a detailed description of the embodiments of the present invention. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0032] In the description of the present utility model, among them, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. It may refer to a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. Additionally, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0036] Please refer to Figure 1 and Figure 2 this application

[0037] provides a battery 100. The battery 100 includes a circuit board 10, a battery cell 30, and a pressing mechanism 70. The circuit board 10 is provided with a power connection portion 11. The battery cell 30 includes tab 31. The pressing mechanism 70 presses the tab 31 against the power connection portion 11 to electrically connect the circuit board 10 and the battery cell 30.

[0038] Specifically, one or more power connection parts 11 may be provided on the circuit board 10. The tab 31 may be provided at a position on the circumferential side of the battery cell 30 corresponding to the power connection part 11. Correspondingly, there may also be one or more tabs 31. The circuit board 10 and the battery cell 30 may be provided in the housing 50 by a snap-fit manner to facilitate the installation and removal of the circuit board 10 and the battery cell 30. When the circuit board 10 needs to be electrically connected to the battery cell 30, the pressing mechanism 70 may press the tab 31 against the power connection part 11 to electrically connect the battery cell 30 and the circuit board 10. It should be noted that the tab 31 and the battery cell 30 may be integrally formed to reduce production costs. The tab 31 may be made of materials such as aluminum, nickel, nickel-plated copper, or nickel-plated copper alloy, which is not limited herein.

[0039] In one embodiment, first, the circuit board 10 and the battery cell 30 may be stacked in sequence, and the power connection part 11 and the tab 31 may be aligned with the pressing mechanism 70 so that the power connection part 11, the tab 31, and the pressing mechanism 70 are located on the same axis. At this time, under the action of the pressing mechanism 70, the tab 31 may be pressed against the power connection part 11 to electrically connect the circuit board 10 and the battery cell 30.

[0040] In this way, the battery 100 according to the embodiment of the present application can press the tab 31 of the battery cell 30 against the power connection part 11 of the circuit board 10 through the pressing mechanism 70 to electrically connect the battery cell 30 and the circuit board 10, simplifying the connection process between the battery cell 30 and the circuit board 10, making the connection process between the battery cell 30 and the circuit board 10 relatively simple, and having a lower production cost.

[0041] It can be understood that compared with the related art in which the circuit board 10 and the battery cell 30 are electrically connected by laser welding, the embodiment of the present application connects the circuit board 10 and the battery cell 30 by pressing the tab 31 against the power connection part 11 through the pressing mechanism 70, which can simplify the connection process between the circuit board 10 and the battery cell 30. While making the connection process between the battery cell 30 and the circuit board 10 relatively simple, there is no need to purchase expensive laser welding equipment, the production cost is low, and the application range has less limitation.

[0042] Please refer to Figure 2 and Figure 3 , in some embodiments, the power connection part 11 includes a conductive layer 111. The pressing mechanism 70 presses the tab 31 against the conductive layer 111 to electrically connect the battery cell 30 and the circuit board 10. That is, the conductive layer 111 may be provided at a position on the circuit board 10 corresponding to the tab 31 of the battery cell 30. When the circuit board 10 and the battery cell 30 are provided in the housing 50 and the power connection part 11 and the tab 31 are aligned with the pressing mechanism 70, the pressing mechanism 70 may press the tab 31 against the conductive layer 111 to electrically connect the battery cell 30 and the circuit board 10. It should be noted that the conductive layer 111 may be copper foil or the like, which is not limited herein.

[0043] Please combine with Figures 2 to 6 , in some embodiments, a through hole 113 is further provided on the power connection part 11. A conductive layer 111 is provided on the peripheral side and the hole wall 1131 of the through hole 113. The tab 31 includes a main body 311 and at least one connecting piece 313. The connecting piece 313 is disposed at the edge of the via hole 3111. The pressing mechanism 70 passes through the via hole 3111. The pressing mechanism 70 presses the main body 311 against the conductive layer 111 provided on the peripheral side of the through hole 113, and presses the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131.

[0044] Specifically, a through hole 113 may be formed on the power connection part 11. A conductive layer 111 may be provided on the peripheral side and the hole wall 1131 of the through hole 113. One or more connecting pieces 313 may be provided on the main body 311. When the pressing mechanism 70 passes through the via hole 3111 and the through hole 113, the connecting piece 313 may be bent. At this time, the pressing mechanism 70 may press the main body 311 against the conductive layer 111 provided on the peripheral side of the through hole 113, and press the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131.

[0045] In some embodiments, the main body 311 is formed with a via hole 3111 aligned with the through hole 113. The connecting piece 313 is disposed at the edge of the via hole 3111. The pressing mechanism 70 passes through the via hole 3111 and the through hole 113. The pressing mechanism 70 presses the main body 311 against the conductive layer 111 provided on the peripheral side of the through hole 113, and presses the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131.

[0046] Specifically, a via hole 3111 aligned with the through hole 113 may be formed on the body of the tab 31. One or more connecting pieces 313 may be provided on the edge of the via hole 3111. When the pressing mechanism 70 passes through the via hole 3111 and the through hole 113, the connecting piece 313 may be bent. At this time, the pressing mechanism 70 may press the main body 311 against the conductive layer 111 provided on the peripheral side of the through hole 113, and press the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131.

[0047] In one embodiment, as Figure 5 shown, a pre-punched via hole 3111 of the tab 31 aligned with the through hole 113 may be provided on the body of the tab 31. Four connecting pieces 313 may be provided on the edge of the via hole 3111. When the pressing mechanism 70 does not pass through the via hole 3111, the four connecting pieces 313 may cover the via hole 3111 in parallel with the pressing mechanism 70 to make the via hole 3111 in an X shape.

[0048] In the case where the pressing mechanism 70 passes through the via hole 3111 and the through hole 113, as Figure 3 andFigure 6 As shown, the main body 311 can contact the conductive layer 111 provided on the periphery of the through hole 113 under the pressing force of the pressing mechanism 70, and the connecting piece 313 can be bent towards the direction close to the hole wall 1131 under the pressing force of the pressing mechanism 70 to contact the conductive layer 111 provided on the hole wall 1131 of the through hole 113, so that while the pressing mechanism 70 presses the main body 311 against the conductive layer 111 provided on the periphery of the through hole 113, the connecting piece 313 is pressed against the conductive layer 111 provided on the hole wall 1131, realizing electrical connection between the battery cell 30 and the circuit board 10.

[0049] It should be noted that Figure 5 the four connecting pieces 313 shown in the figure provided at the edge of the via hole 3111, and when the pressing mechanism 70 is not inserted into the via hole 3111, the four connecting pieces 313 are parallel to the pressing mechanism 70 and cover the via hole 3111 to make the via hole 3111 in an X-shaped form are only for illustrative purposes. When there are multiple connecting pieces 313 at the edge of the via hole 3111, the number of the connecting pieces 313 and the shape presented by the multiple connecting pieces 313 covering the via hole 3111 parallel to the pressing mechanism 70 can be set according to the actual application situation and are not limited herein. The main body and the connecting piece 313 can be integrally formed to reduce production costs.

[0050] Please refer to Figure 1 and Figure 2 In some embodiments, the battery further includes a housing 50. The circuit board 10 and the battery cell 30 are both disposed in the housing 50. The pressing mechanism 70 is disposed in the housing 50, and the pressing mechanism 70 presses the tab 31 against the power connection portion 11.

[0051] Specifically, a pressing mechanism 70 can be disposed in the housing 50. When the circuit board 10 and the battery cell 30 are disposed in the housing 50, the pressing mechanism 70 can press the tab 31 against the power connection portion 11 to realize electrical connection between the battery cell 30 and the circuit board 10. It should be noted that the tab 31 and the battery cell 30 can be integrally formed to reduce production costs. The tab 31 can be made of materials such as aluminum, nickel, nickel-plated copper, or nickel-plated copper alloy, and is not limited herein.

[0052] In one embodiment, first, the circuit board 10 and the battery cell 30 can be sequentially placed into the housing 50, and the power connection portion 11 and the tab 31 are aligned with the pressing mechanism 70, so that the power connection portion 11, the tab 31, and the pressing mechanism 70 are located on the axial direction of the housing 50. At this time, under the action of the pressing mechanism 70, the tab 31 can be pressed against the power connection portion 11 to realize electrical connection between the circuit board 10 and the battery cell 30.

[0053] Please combine Figure 4 and Figure 8, in some embodiments, the housing 50 includes a frame 51 and a cover plate 53 covering the frame 51. The pressing mechanism 70 includes a column 71 disposed on the cover plate 53 corresponding to the through hole 113 and a convex portion 73 disposed on the frame 51 and cooperating with the column 71. The column 71 passes through the through hole 3111 and the through hole 113 to be connected to the convex portion 73, and the column 71 and the convex portion 73 cooperate to press the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131.

[0054] Specifically, the cover plate 53 can be covered on the frame 51 by a snap-fit manner to facilitate the disassembly and installation of the cover plate 53. The column 71 corresponding to the through hole 113 can be provided on the cover plate 53. The cover plate 53 and the column 71 can be integrally formed to reduce the production cost. The convex portion 73 corresponding to the column 71 can be provided on the frame 51. The frame 51 and the convex portion 73 can be integrally formed. The shape of the convex portion 73 can be a rhomboid or an oval, etc., which is not limited herein.

[0055] In one embodiment, first, the circuit board 10 can be placed on the frame 51, and the center of the through hole 113 of the circuit board 10 can be aligned with the convex portion 73 on the frame 51. Then, the battery cell 30 can be placed on the circuit board 10, and the through hole 3111 on the tab 31 can be aligned with the through hole 113. Finally, with the column 71 on the cover plate 53 aligned with the through hole 3111, the cover plate 53 is covered on the frame 51. At this time, the column 71 passes through the through hole 3111 and the through hole 113 in sequence to be connected to the convex portion 73, so that the connecting piece 313 is bent toward the direction close to the through hole 113 to contact the conductive layer 111 provided on the hole wall 1131. Furthermore, the connecting piece 313 and the conductive layer 111 provided on the hole wall 1131 are pressed by the cooperation of the column 71 and the convex portion 73, realizing the electrical connection between the battery cell 30 and the circuit board 10.

[0056] It should be noted that the frame 51 can be made of plastic or rubber materials to reduce the production cost. The cover plate 53 can be made of plastic or metal. That is, when the cover plate 53 is made of plastic, the production cost can be reduced. When the cover plate 53 can be made of metal, for example, it can be made of aluminum alloy to reduce the weight of the cover plate 53 while extending the service life of the cover plate 53.

[0057] In addition, when the battery cell 30 is damaged or abnormal, in the embodiment of the present application, the cover plate 53 and the frame 51 can be directly separated, so that the pressing mechanism 70 no longer presses the battery cell 30 and the circuit board 10, disconnecting the connection between the battery cell 30 and the circuit board 10, which is convenient for the disassembly and replacement of the battery cell 30 without scrapping the entire battery 100.

[0058] In some embodiments, the column 71 is a hollow column 71, and the convex portion 73 passes through the hollow column 71 to expand the hollow column 71, so that the connecting piece 313 is pressed against the conductive layer 111 provided on the hole wall 1131. That is, in the embodiments of the present application, by setting the column 71 as a hollow column 71, when the convex portion 73 passes through the hollow column 71 to expand the hollow column 71, a pressing force can be applied to the column 71 through the convex portion 73, so that the column 71 presses the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131, thereby realizing the electrical connection between the battery cell 30 and the circuit board 10.

[0059] Please refer to Figure 3 and Figure 8 In some embodiments, the column 71 includes a hollow column body 712 and a plurality of elastic pieces 713 arranged at intervals along the circumferential direction of the column 71. The plurality of elastic pieces 713 are connected to one end of the hollow column body 712 close to the convex portion 73, and the convex portion 73 applies a pressing force to the elastic pieces 713 so that the elastic pieces 713 press the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131.

[0060] That is, the plurality of elastic pieces 713 can be arranged at intervals along the circumferential direction of the column 71 and connected to one end of the hollow column body 712 close to the convex portion 73. Thus, when the convex portion 73 passes through the hollow column 71 to expand the hollow column 71, a pressing force can be applied to the elastic pieces 713 through the convex portion 73, so that the elastic pieces 713 press the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131, thereby realizing the electrical connection between the battery cell 30 and the circuit board 10.

[0061] It should be noted that as Figure 8 shown, the plurality of elastic pieces 713 can be arranged at intervals of a predetermined distance along the circumferential direction of the column 71, and engaging portions 711 can be provided on one ends of the outer wall surfaces of two opposite elastic pieces 713 facing the convex portion 73. The predetermined distance can be, for example, 0.1 cm, 0.2 cm, 0.3 cm, 0.4 cm or 0.5 cm, etc., and is not limited herein.

[0062] When the convex portion 73 passes through the hollow column 71 to expand the elastic pieces 713, the engaging portions 711 can be engaged and locked with the lower edge of the through hole 113 under the action of the pressing force applied by the convex portion 73 to the elastic pieces 713, pressing the connecting piece 313 against the conductive layer 111 provided on the hole wall 1131, so that the battery cell 30 can be electrically connected and conducted to the circuit board 10 through the tab 31. Further, it should be noted that the engaging portions 711 can be provided on each of the plurality of elastic pieces 713 or on some of the plurality of elastic pieces 713, and is not limited herein.

[0063] Please refer to Figure 9, in some embodiments, a draft angle 731 is provided on the circumferential side of the convex portion 73. That is, in the embodiment of the present application, the circumferential edge of the convex portion 73 is set as the draft angle 731, and the top of the convex portion 73 to the bottom of the convex portion 73 becomes thicker from thinner, so that the angle of the draft angle 731 at the top of the convex portion 73 is smaller than the angle at the bottom of the convex portion 73, so that the convex portion 73 can be more easily inserted into or pulled out of the hollow column 71 while facilitating the disassembly and replacement of the battery cell 30.

[0064] Please refer to Figure 3 , in some embodiments, the pressing mechanism 70 further includes a pressing ring 75. The pressing ring 75 is disposed between the cover plate 53 and the tab 31 of the battery cell 30, and presses the main body 311 against the conductive layer 111 provided on the circumferential side of the through hole 113. That is, in the embodiment of the present application, by providing the pressing ring 75 between the cover plate 53 and the tab 31 of the battery cell 30, the main body 311 can be further pressed against the conductive layer 111 provided on the circumferential side of the through hole 113 through the pressing ring 75, so that the pressing ring 75 forms an interference fit with the cover plate 53 and the main body 311, thereby ensuring that the tab 31 is pressed and connected to the circuit board 10, making the connection between the battery cell 30 and the circuit board 10 tighter. It should be noted that the pressing ring 75 can be made of materials such as rubber, silica gel or ethylene, and is not limited herein. When the pressing ring 75 is disposed between the cover plate 53 and the tab 31 of the battery cell 30, the column 71 can pass through the pressing ring 75, so that the pressing ring 75 cooperates with the cover plate 53, the column 71 and the main body 311 to further press the main body 311 against the conductive layer 111 provided on the circumferential side of the through hole 113.

[0065] The present application also provides an electrical device. The electrical device includes the battery 100 described above. The specific structure of the battery 100 is as described above. For the sake of brevity of the article, it will not be repeated here. It should be noted that the electrical device can be a vehicle, a household appliance or a mobile phone, etc., and is not limited herein.

[0066] In this way, the electrical device according to the embodiment of the present application can press the tab 31 of the battery cell 30 against the power connection portion 11 of the circuit board 10 through the pressing mechanism 70 to realize the electrical connection between the battery cell 30 and the circuit board 10, simplify the connection process between the battery cell 30 and the circuit board 10, make the connection process between the battery cell 30 and the circuit board 10 relatively simple, and the production cost is relatively low.

[0067] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A battery, characterized in that, The battery includes: a circuit board provided with a power connection part; a battery cell including tab ears; and a pressing mechanism that presses the tab ears against the power connection part to electrically connect the circuit board to the battery cell.

2. The battery according to claim 1, characterized in that, The power connection part includes a conductive layer, and the pressing mechanism presses the tab ears against the conductive layer to electrically connect the battery cell to the circuit board.

3. The battery according to claim 2, characterized in that, A through hole is further provided on the power connection part, and the conductive layer is provided on the peripheral side and the hole wall of the through hole. The tab ear includes a main body and at least one connecting piece. The pressing mechanism passes through the through hole, and the pressing mechanism presses the main body against the conductive layer provided on the peripheral side of the through hole and presses the connecting piece against the conductive layer provided on the hole wall.

4. The battery according to claim 3, characterized in that, The main body is formed with a through hole aligned with the through hole, and the connecting piece is provided at the edge of the through hole. The pressing mechanism passes through the through hole and the through hole.

5. The battery according to claim 4, characterized in that, The battery further includes a housing. The circuit board and the battery cell are both arranged in the housing, and the pressing mechanism is arranged in the housing. The pressing mechanism presses the tab ears against the power connection part.

6. The battery according to claim 5, characterized in that, The housing includes a frame and a cover plate covering the frame. The pressing mechanism includes a column provided on the cover plate corresponding to the through hole and a convex part provided on the frame cooperating with the column. The column passes through the through hole and the through hole to be connected to the convex part, and the column and the convex part cooperate to press the connecting piece against the conductive layer provided on the hole wall.

7. The battery according to claim 6, characterized in that, The column is a hollow column, and the convex part passes through the hollow column to expand the hollow column, so that the connecting piece is pressed against the conductive layer provided on the hole wall.

8. The battery according to claim 7, wherein, The column includes a hollow column body and a plurality of elastic pieces arranged at intervals along the circumferential direction of the column. The plurality of elastic pieces are connected to one end of the hollow column body close to the convex part, and the convex part applies a pressing force to the elastic pieces so that the elastic pieces press the connecting piece against the conductive layer provided on the hole wall.

9. The battery according to any one of claims 6 - 8, characterized in that, A clamping part is provided on the outer peripheral wall of the column, and the clamping part is clamped with the peripheral side surface of the through hole close to the frame.

10. The battery according to any one of claims 6 - 8, characterized in that, A draft angle is provided on the peripheral side of the convex part.

11. The battery according to any one of claims 6 - 8, characterized in that, The pressing mechanism further includes a pressing ring, and the pressing ring is arranged between the cover plate and the tab ears of the battery cell and presses the main body against the conductive layer provided on the peripheral side of the through hole.

12. An electrical device, characterized in that, The electrical device includes the battery according to any one of claims 1-11.

Images