battery

Abstract

The utility model discloses a battery, include: battery core has negative pole and positive pole, circuit board and first conductive sheet have two, and are used respectively to connect the negative pole and positive pole of battery core with circuit board electricity, and second conductive sheet is used for connecting the work piece of outside to be powered with circuit board electricity, first conductive sheet and second conductive sheet can be deformed at least partial bending. Compared with prior art, the utility model has the advantages that the conductive sheet can be bent and deformed, when the two wire ends produce displacement, the conductive sheet can offset the displacement variable of the welding position through the deformation of itself, thereby maintaining the stability of the wire end connection, the two wire ends are not easy to break, and the risk of pad fracture is reduced.

Description

Technical Field

[0001] This utility model relates to power supply technology, and in particular to a battery. Background Technology

[0002] In existing batteries, the circuit board is usually located near the positive terminal. Due to space limitations, the circuit board is directly connected to the battery using conductive plates (electrode plates), as disclosed in Chinese Patent Application No. 201680091642.4. However, during impacts and vibrations, the circuit board is prone to displacement and deviation, which can cause the conductive plates connected to the circuit board to break, and the solder pads to easily break.

[0003] Furthermore, since the battery circuit board is typically located above the positive terminal, the conductive strip leading from the negative terminal needs to traverse the entire battery along its axis to reach the circuit board near the positive terminal. This conductive strip is not only large but also irregularly shaped, causing significant inconvenience in both manufacturing and assembly. The battery circuit board usually connects 3-4 conductive strips, which are clustered in a narrow space near the positive terminal. During impacts and vibrations, short circuits are easily caused (especially on the conductive strip connected to the negative terminal), thus reducing battery life. The positions of the positive and negative terminals on the circuit board are usually fixed, and forcibly pulling the conductive strip leading to the negative terminal away from adjacent conductive strips will cause the strip to twist, greatly reducing connection reliability.

[0004] Therefore, further improvements are needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a battery that improves the stability of the connection of the conductive sheet terminals, in order to address the shortcomings of the existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a battery, comprising:

[0007] A battery cell has a negative electrode and a positive electrode;

[0008] Circuit board;

[0009] The first conductive sheet, having two portions, is used to electrically connect the negative and positive terminals of the battery cell to the circuit board, respectively; and

[0010] The second conductive sheet is used to electrically connect the external working component to be powered to the circuit board.

[0011] Its features are:

[0012] Both the first conductive sheet and the second conductive sheet are at least partially bent and deformable.

[0013] This type of conductive sheet can compensate for the displacement of the solder joint by its own deformation when the two terminals are displaced, thereby maintaining the stability of the connection between the terminals. The two terminals are less likely to break, reducing the risk of solder pad breakage.

[0014] Preferably, both the first conductive sheet and the second conductive sheet include an integral first part, a second part, and a third part, with the first part and the third part located at opposite ends of the second part to form a gate shape.

[0015] Furthermore, the battery also includes an insulated battery frame, which is fixedly mounted on the positive electrode side of the battery cell. The circuit board is disposed inside the battery frame, and the first and second conductive plates extend from the outside of the battery frame into the battery frame and connect to the circuit board. This allows for a further increase in the length of the conductive plates and a greater degree of freedom relative to the battery frame, further reducing the risk of breakage at both ends.

[0016] Preferably, the first conductive sheet and the second conductive sheet extend from the outside of the battery holder across the top surface of the battery holder into the battery holder, respectively, to further increase the length of the conductive sheet.

[0017] Preferably, the first conductive sheet and the second conductive sheet each include an integral first part, a second part and a third part. The first part and the third part are located at opposite ends of the second part to form a gate shape. The first part is located on the outer side of the battery holder, and the third part is located inside the battery holder and can be connected to the circuit board.

[0018] Furthermore, to facilitate connection with the positive electrode of the battery cell, one of the first conductive sheets also has a fourth portion, which is formed by bending the bottom of the first portion away from the second portion. The fourth portion is electrically connected to the positive electrode of the battery cell, thereby the first conductive sheet is used as a positive electrode conductive sheet of the battery.

[0019] Furthermore, to facilitate connection with the negative electrode of the battery cell, the battery also includes a third conductive sheet, wherein a first conductive sheet is connected to the third conductive sheet, and the third conductive sheet extends to be electrically connected to the negative electrode of the battery cell.

[0020] Preferably, the first conductive sheet and the third conductive sheet are connected by spot welding.

[0021] Furthermore, the third conductive sheet includes a first plane and a second plane, the first plane being tightly attached to the first conductive sheet, and the second plane being tightly attached to the side of the battery cell. Compared to the traditional one-piece negative electrode conductive sheet, this structure not only reduces the processing difficulty but also makes assembly more convenient, and the spot welding connection is safe and reliable.

[0022] Furthermore, the outer surface and / or top surface of the battery holder are formed with positioning grooves that are adapted to the first conductive sheet and the second conductive sheet for at least partial embedding of the first conductive sheet and the second conductive sheet. The positioning grooves are spaced apart and insulated. The grooves can better position and stabilize each first conductive sheet, and also physically insulate and isolate each first conductive sheet from the others, thus solving the risk of short circuits caused by the conductive sheets being too close together.

[0023] Compared with the prior art, the advantages of this utility model are: it adopts a bendable and deformable conductive sheet. When the two terminals are displaced, the conductive sheet can offset the displacement of the welding part through its own deformation, thereby maintaining the stability of the connection between the terminals. The two terminals are not easy to break, reducing the risk of pad breakage. Attached Figure Description

[0024] Figure 1 This is a front view of the battery according to an embodiment of the present utility model;

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

[0026] Figure 3 This is a schematic diagram of the battery concealed casing according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the battery concealed housing and battery holder according to an embodiment of the present utility model;

[0028] Figure 5 for Figure 4 A diagram viewed from top to bottom;

[0029] Figure 6 This is a schematic diagram of the first conductive sheet and circuit board of the battery according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the battery holder of the battery according to an embodiment of the present utility model;

[0031] Figure 8 This is a schematic diagram of the first conductive sheet of the battery according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the second conductive sheet of the battery according to an embodiment of the present invention;

[0033] Figure 10 This is a cross-sectional view of the battery according to an embodiment of the present invention. Detailed Implementation

[0034] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0036] See Figures 1-10 A battery includes a casing 1, a base 2 disposed at the bottom of the casing 1, and a battery cell 3 disposed in the space enclosed by the casing 1 and the base 2. The negative electrode 31 of the battery cell 3 is close to the base 2, while the positive electrode 32 of the battery cell 3 is located at the end of the casing 1 away from the base 2.

[0037] The battery also includes a circuit board 4, a battery holder 5, an insulating plate 6, a first conductive sheet 71, a second conductive sheet 72, and a third conductive sheet 8. The circuit board 4 is located adjacent to the positive electrode 32 of the battery cell 3, and the battery holder 5 is located between the positive electrode 32 of the battery cell 3 and the top of the outer casing 1. The battery holder 5 is an insulating component, and it has a hollow frame shape with openings at both the top and bottom. The circuit board 4 can be fixed inside the battery holder 5, and the insulating plate 6 can be located between the positive electrode 32 of the battery cell 3 and the circuit board 4.

[0038] The first conductive sheet 71 and the second conductive sheet 72 each include an integral first portion 711, a second portion 712, and a third portion 713. The first portion 711 is located on the outer side of the battery holder 5. The second portion 712 is laterally bent from the top of the first portion 711. The third portion 713 is formed by bending downwards from the end of the second portion 712 away from the first portion 711. The second portion 712 passes over the top of the battery holder 5, so that the third portion 713 is located inside the battery holder 5 and is electrically connected to the circuit board 4. The first portion 711, the second portion 712, and the third portion 713 constitute a generally downward-opening, door-shaped conductive sheet. Alternatively, the second portion 712 may also pass through the side of the battery holder 5 to enter the interior of the battery holder 5.

[0039] In this embodiment, there are two first conductive sheets 71. One of the first conductive sheets 71 also has a fourth portion 714, which is formed by bending the bottom of its own first portion 711. The fourth portion 714 is electrically connected to the positive electrode 32 of the battery cell 3, thus this first conductive sheet 71 serves as the positive electrode conductive sheet of the battery. The fourth portion 714 is located on the side of the insulating plate 6 away from the circuit board 4. The other first conductive sheet 71 is connected to a third conductive sheet 8, and the third conductive sheet 8 extends downward and is electrically connected to the negative electrode 31 of the battery cell 3, thus this first conductive sheet 71 serves as the negative electrode conductive sheet of the battery. The first conductive sheet 71 and the third conductive sheet 8 are connected by spot welding.

[0040] The second conductive sheet 72 is used to electrically connect the circuit board 4 and the external working component to be powered, so as to realize power supply. In this embodiment, there are two second conductive sheets 72, which serve as the positive and negative conductive connecting sheets of the working component to be powered, respectively.

[0041] Therefore, the first conductive piece 71 and the second conductive piece 72 are improved from the existing traditional elongated shape to a gate shape, with the two ends (terminals) of the gate shape having the same function as the two terminals of the traditional conductive piece. This gate-shaped conductive piece, through its bending deformation, can offset the displacement of the welded part when the two terminals are displaced, thus maintaining the stability of the terminal connection. This reduces the risk of breakage at the two terminals and lowers the risk of pad breakage. In other words, the displacement stress at the pads of the first conductive piece 71 and the second conductive piece 72 is transferred to the bending structure of the conductive piece.

[0042] Alternatively, the first conductive sheet 71 and the second conductive sheet 72 may not adopt a gate-shaped structure, but may adopt shapes such as arch, V, U, lightning, or spiral, as long as there is a bending part, so as to have space for deformation or be able to absorb deformation.

[0043] Furthermore, as mentioned above, the negative electrode of the battery is electrically connected by connecting one of the first conductive sheets 71 and the third conductive sheet 8. The bottom of the first portion 711 of the first conductive sheet 71 can be lower than the other first conductive sheets 71, and the first portion 711 can extend downward to the side of the battery cell 3. The third conductive sheet 8 includes an integral first plane 81, a second plane 82, and a twisted surface 83 located on the two planes. The first plane 81 is close to the first conductive sheet 71, the second plane 82 is close to the side of the battery cell 3, and the twisted surface 83 is used to mate the upper and lower spatial planes. Compared with the traditional integral structure of the negative electrode conductive sheet, this structure not only reduces the processing difficulty but also makes assembly more convenient, and the spot welding connection is safe and reliable. The third conductive sheet 8 may also have a connecting portion 84 bent relative to the second plane 82 for connection with the negative electrode 31 of the battery cell 3.

[0044] Furthermore, the first conductive sheet 71 and the second conductive sheet 72 are arranged at intervals along the side of the battery holder 5. To better position and stabilize each of the first conductive sheet 71 and the second conductive sheet 72, the outer side and / or top surface of the battery holder 5 are formed with positioning grooves 51 adapted to the first conductive sheet 71 and the second conductive sheet 72. The positioning grooves 51 are spaced apart. Since the battery holder 5 is made of insulating material, the positioning grooves 51 are mutually insulated (those skilled in the art will understand that when the battery holder 5 itself is not made of insulating material, insulating material can be brushed on its surface to achieve local surface insulation, which also achieves the purpose of mutual insulation between the positioning grooves 51). At least a portion of the first part 711 and the second part 712 of the first conductive sheet 71 and the second conductive sheet 72 can be embedded into the positioning grooves 51. Moreover, this form also makes the first conductive sheet 71 and the second conductive sheet 72 physically insulated and isolated from each other, solving the risk of short circuit caused by the conductive sheets being too close together.

[0045] The materials of the first conductive sheet 71, the second conductive sheet 72 and the third conductive sheet 8 mentioned above can be relatively soft FPC boards or metal materials.

Claims

1. A battery, comprising: The battery cell (3) has a negative electrode (31) and a positive electrode (32); Circuit board (4); Two first conductive sheets (71) are provided, and are used to electrically connect the negative electrode (31) and positive electrode (32) of the battery cell (3) to the circuit board (4), respectively; and The second conductive sheet (72) is used to electrically connect the external working component to be powered to the circuit board (4); Its features are: Both the first conductive sheet (71) and the second conductive sheet (72) can be bent at least partially and deformable.

2. The battery according to claim 1, characterized in that: The first conductive sheet (71) and the second conductive sheet (72) each include an integral first part (711), a second part (712) and a third part (713), the first part (711) and the third part (713) being located at opposite ends of the second part (712) to form a gate shape.

3. The battery according to claim 1, characterized in that: The battery also includes an insulated battery frame (5), which is fixedly disposed on the positive electrode (32) side of the battery cell (3). The circuit board (4) is disposed inside the battery frame (5), and the first conductive sheet (71) and the second conductive sheet (72) extend from the outside of the battery frame (5) into the battery frame (5) and are connected to the circuit board (4).

4. The battery according to claim 3, characterized in that: The first conductive sheet (71) and the second conductive sheet (72) extend from the outside of the battery holder (5) across the top surface of the battery holder (5) and into the battery holder (5).

5. The battery according to claim 4, characterized in that: The first conductive sheet (71) and the second conductive sheet (72) each include an integral first part (711), a second part (712) and a third part (713). The first part (711) and the third part (713) are located at opposite ends of the second part (712) to form a gate shape. The first part (711) is located on the outer side of the battery holder (5), and the third part (713) is located inside the battery holder (5) and can be connected to the circuit board (4).

6. The battery according to claim 5, characterized in that: One of the first conductive sheets (71) also has a fourth part (714) formed by bending the bottom of the first part (711) away from the second part (712), and the fourth part (714) is electrically connected to the positive electrode (32) of the battery cell (3), thereby the first conductive sheet (71) is used as the positive electrode conductive sheet of the battery.

7. The battery according to claim 5, characterized in that: The battery also includes a third conductive sheet (8), wherein a first conductive sheet (71) is connected to the third conductive sheet (8), and the third conductive sheet (8) extends to be electrically connected to the negative electrode (31) of the battery cell (3).

8. The battery according to claim 7, characterized in that: The first conductive sheet (71) and the third conductive sheet (8) are connected by spot welding.

9. The battery according to claim 7, characterized in that: The third conductive sheet (8) includes a first plane (81) and a second plane (82). The first plane (81) is attached to the first conductive sheet (71), and the second plane (82) is attached to the side of the battery cell (3).

10. The battery according to claim 3, characterized in that: The outer side and / or top surface of the battery holder (5) are formed with positioning grooves (51) that are adapted to the first conductive sheet (71) and the second conductive sheet (72) for at least partial embedding of the first conductive sheet (71) and the second conductive sheet (72), and the positioning grooves (51) are spaced apart and insulated.

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