Battery protection board, battery, electronic device, and cell connection structure

Abstract

The embodiments of the present application relate to the technical field of batteries, and provide a battery protection board. The battery protection board comprises a protection board main body, which is vertically placed on a head portion of a cell and comprises an assembly side wall extending along the length direction of the cell, and the assembly side wall is provided with a conductive portion electrically connected to a cell tab, so that when the cell tab is assembled with the protection board main body, neither the tab nor the conductive portion needs to be bent by 180° between the protection board main body and the cell, so as to effectively reduce the space occupied by the connection between the tab and the protection board main body along the length direction of the cell, thereby reducing the size of a packaging structure of the protection board main body along the length direction of the cell, in order to improve battery capacity. The embodiments of the present application further provide a battery protection board, a battery, an electronic device, and a cell connection structure.

Description

Battery protection board, battery, electronic devices and cell connection structure

[0001] This application claims priority to Chinese patent application filed on October 18, 2024, with application number 202422529776.4 and entitled "Battery Protection Board and Battery Component", the entire contents of which are incorporated herein by reference.

[0002] This application claims priority to Chinese Patent Application No. 202520318048.0, filed on February 25, 2025, entitled “A Battery and an Electrical Device”, the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to Chinese patent application filed on June 13, 2025, with application number 202521211379.0 and entitled "Battery Protection Board, Battery and Electronic Device", the entire contents of which are incorporated herein by reference.

[0004] This application claims priority to Chinese patent application filed on December 9, 2025, with application number 202522619121.0 and entitled "Cell Connection Structure and Battery", the entire contents of which are incorporated herein by reference. Technical Field

[0005] This application belongs to the field of battery technology, specifically relating to a battery protection board, battery, electronic device and cell connection structure. Background Technology

[0006] Lithium-ion batteries, as a highly efficient energy storage device, have rapidly become the dominant energy supply for portable electronic devices since their commercialization due to their core technological advantages, such as high energy density, long cycle life, no memory effect, and excellent charge and discharge efficiency. Currently, these batteries are widely used in various consumer electronics products, including mobile phones, digital cameras, laptops, tablets, and portable wearable devices, becoming one of the key components supporting the development of modern portable electronic technology.

[0007] With the development of technology and the need to meet electricity demands, improving the energy density of lithium-ion batteries has become crucial. Summary of the Invention

[0008] In view of this, embodiments of this application provide a battery protection board, battery, electronic device and cell connection structure, which at least to some extent solves the above technical problems.

[0009] This application embodiment provides a battery protection board, the battery protection board comprising:

[0010] A printed circuit board, wherein a protection circuit is provided on the printed circuit board;

[0011] A flexible circuit board, comprising an integrally formed board body and a conductive portion, wherein the board body is electrically connected to the printed circuit board, the conductive portion is located on one side of the board body in the width direction, and the projection of the printed circuit board onto the board body does not coincide with the conductive portion.

[0012] The battery protection board provided in this application no longer uses nickel sheets for electrical connection between the battery protection board and the battery cell's tabs, as is done in the prior art. Instead, it uses a conductive part integrally formed with the main body of the flexible circuit board, and the projection of the conductive part does not coincide with the main body of the printed circuit board. This saves space on the printed circuit board that would otherwise be occupied by nickel sheets. Furthermore, since the conductive part and the main body are an integral structure, there is no need for additional connection methods such as welding between the conductive part and the main body, saving production steps and improving the production efficiency of the battery protection board.

[0013] This application provides a battery, which includes the battery protection board as described above;

[0014] The battery cell has tabs that are electrically connected to the conductive part of the battery protection board.

[0015] The battery provided in this application embodiment includes the battery protection board as described above, as well as the beneficial effects described above, which will not be repeated here.

[0016] This application provides a battery, including:

[0017] A battery protection board, wherein the battery protection board has a top surface on which components are arranged along its thickness direction;

[0018] A battery cell, including tabs, said tabs being welded to one side of the battery protection plate in its width direction;

[0019] The connector includes a first connecting portion and a second connecting portion that are connected to each other; the first connecting portion is located between the battery protection board and the electrode tab, and the first connecting portion is welded to the electrode tab; the second connecting portion has a welding surface, the area of ​​which is greater than or equal to 2 mm². 2 The welding surface is welded to the top surface.

[0020] In the battery provided in this embodiment, the welding surface of the second connection part is welded to the top surface of the battery protection board, and the area of ​​the welding surface is greater than or equal to 2mm². 2This design results in a larger contact area between the second connector and the battery protection board, ensuring a tighter fit and reducing the difficulty of soldering the connector to the battery protection board. The welding tabs are located on one side of the battery protection board along its width, preventing interference with the arrangement of components on the top surface and increasing the space available for component placement on the circuit board.

[0021] This application provides an electronic device including the battery described above.

[0022] The electronic device provided in this application includes the battery described above, as well as the beneficial effects described above, which will not be repeated here.

[0023] This application provides a battery protection board, including a protection board body and a first electronic device;

[0024] The body of the first electronic device is at least partially embedded within the main body of the protective plate;

[0025] The protection plate body is placed vertically at the head of the battery cell. The protection plate body includes an assembly sidewall extending along the length of the battery cell. The assembly sidewall is provided with a conductive part for electrical connection with the electrode tab of the battery cell.

[0026] The battery protection board provided in this application includes a protection board body, which is vertically placed at the head of the battery cell. The circumferential sidewall of the protection board body includes an assembly sidewall extending along the length of the battery cell. The assembly sidewall has a conductive portion for electrical connection with the battery cell's tabs. Therefore, by placing the conductive portion on the assembly sidewall on one side of the width direction of the protection board body, neither the tabs nor the conductive portion need to be bent 180° between the protection board body and the battery cell when the battery cell's tabs are assembled with the protection board body. This effectively reduces the space occupied by the connection between the tabs and the protection board body in the length direction of the battery cell, thereby reducing the size of the protection board body's encapsulation structure in the length direction of the battery cell. This allows for a certain extension of the battery cell's length within the constraints of a given battery size, thereby increasing battery capacity. Simultaneously, the battery protection board also includes a first electronic device, the body of which is at least partially embedded inside the protection board body. This avoids the first electronic device occupying additional space in the length direction of the battery, further reducing the size of the protection board body's encapsulation structure in the length direction of the battery cell and increasing battery capacity.

[0027] This application provides a battery that includes the battery protection board described in any of the above embodiments.

[0028] The battery provided in this application embodiment includes a battery protection board, and therefore the battery also has the beneficial effects of a battery protection board.

[0029] This application provides an electronic device including the battery described above.

[0030] The present application also provides an electronic device, which includes the battery described above. The battery includes a battery protection board, so the electronic device also has the beneficial effects of a battery protection board.

[0031] This application provides a battery cell connection structure, including:

[0032] PCB;

[0033] A conductive component, comprising a first connecting portion, a second connecting portion, and a third connecting portion connected in sequence, wherein the second connecting portion is disposed at one end of the PCB in the width direction, and the first connecting portion and the third connecting portion are bent toward the two sides of the PCB in the thickness direction and attached to the PCB respectively;

[0034] The battery cell tab is connected to the side of the first connection part, the second connection part, or the third connection part away from the PCB.

[0035] The beneficial effects of the cell connection structure provided in this application include: the cell connection structure of this application uses a U-shaped conductive element formed by the first connecting part, the second connecting part, and the third connecting part to wrap around the PCB thickness direction, so that the conductive element occupies only the space along the length direction of the battery with the single thickness of the first connecting part. This design optimizes the space occupied by the traditional L-shaped conductive element after bending, which requires twice the thickness (the thickness of the conductive element body plus the thickness of the bending radius), to only the material thickness of the first connecting part, thereby minimizing the space occupied along the length direction of the battery. The freed-up space can be directly used to increase the cell volume and improve the battery energy density.

[0036] This application provides a battery including a cell connection structure as described in any of the foregoing embodiments.

[0037] The battery provided in this application embodiment can reduce the space occupied by the cell connection structure in the length direction of the battery, increase the cell volume, and thus improve the battery capacity.

[0038] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0039] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0040] Figure 1 shows a schematic diagram of a two-dimensional view of a battery protection board provided according to an embodiment of this application;

[0041] Figure 2 shows a schematic diagram of a three-dimensional view of a battery protection board provided according to an embodiment of this application;

[0042] Figure 3 shows a schematic exploded view of a battery protection board provided according to an embodiment of this application;

[0043] Figure 4 shows a schematic diagram of a two-dimensional view of the battery protection board provided according to an embodiment of this application when the conductive part is not bent;

[0044] Figure 5 shows a schematic diagram of a two-dimensional view of the battery protection board provided according to an embodiment of this application when the conductive part is bent;

[0045] Figure 6 shows a schematic diagram of a two-dimensional view of the flexible circuit board of the battery protection board provided according to an embodiment of this application;

[0046] Figure 7 shows a schematic diagram of a two-dimensional printed circuit board of a battery protection board provided according to an embodiment of this application;

[0047] Figure 8 shows a schematic cross-sectional view of an example of a printed circuit board for a battery according to an embodiment of this application;

[0048] Figure 9 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery provided according to an embodiment of this application;

[0049] Figure 10 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery provided according to an embodiment of this application;

[0050] Figure 11 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery provided according to an embodiment of this application;

[0051] Figure 12 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery according to an embodiment of this application;

[0052] Figure 13 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery provided according to an embodiment of this application;

[0053] Figure 14 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery provided according to an embodiment of this application;

[0054] Figure 15 shows a schematic cross-sectional view of yet another example of a printed circuit board for a battery provided according to an embodiment of this application;

[0055] Figure 16 is a schematic cross-sectional view of a battery according to this application;

[0056] Figure 17 is a structural schematic diagram of a connector according to an embodiment of this application;

[0057] Figure 18 is a structural schematic diagram of another connector according to an embodiment of this application;

[0058] Figure 19 is a top view of a connector according to an embodiment of this application;

[0059] Figure 20 is a bottom view of a connector according to an embodiment of this application;

[0060] Figure 21 is a side view of a connector according to an embodiment of this application;

[0061] Figure 22 is a schematic diagram of the structure of a battery protection board according to an embodiment of this application;

[0062] Figure 23 is a schematic diagram of a second connection portion welded to the top surface of a battery protection board according to an embodiment of this application;

[0063] Figure 24 is a schematic diagram of the assembly structure of the battery protection board and the battery cell in the prior art;

[0064] Figure 25 is a schematic diagram of an assembly structure of a battery protection board and a battery cell provided in an embodiment of this application (the tabs do not include the second tab portion);

[0065] Figure 26 is a schematic diagram of another assembly structure of the battery protection board and the battery cell provided in the embodiment of this application (the tab includes the second tab part);

[0066] Figure 27 is a schematic diagram of the battery protection board provided in the embodiment of this application from a first-view perspective;

[0067] Figure 28 is a schematic diagram of the battery protection board provided in the embodiment of this application from a second perspective.

[0068] Figure 29 is a schematic diagram of the cell connection structure provided in the first embodiment of this application;

[0069] Figure 30 is a schematic diagram of the cell connection structure provided in the second embodiment of this application;

[0070] Figure 31 is a schematic diagram of the cell connection structure provided in the third embodiment of this application;

[0071] Figure 32 is a schematic diagram of the cell connection structure provided in the fourth embodiment of this application;

[0072] Figure 33 is a schematic diagram of the cell connection structure provided in the fifth embodiment of this application.

[0073] Explanation of reference numerals in the attached drawings: 100-Printed circuit board; 110-First surface; 120-Second surface; 200-Flexible circuit board; 210-Board body; 211-Third surface; 212-Fourth surface; 220-Conductive part; 300-Conductive layer; 310-Pad; 400-Component; 500-First package; 600-Battery cell; 610-Taper; 700-Second package; 800-Thickness direction; 900-Length direction; 1. Connector; 11. First connecting part; 111. First sub-connecting part; 112. Second sub-connecting part; 1121. Reinforcing part; 1122. Second surface; 12. Second connecting part; 121. First surface; 122. Welding surface; 14. Rounded chamfer; 2. Battery protection board; 21. Solder pad; 22. Top surface; 3. Battery cell; 31. Tab; 32. Battery cell body; 4. Components; 1'-Battery cell, 11'-Taper, 2'-Protection board, 21'-Surface mount device, 22'-Structural component; 1-Battery cell, 11-Taper, 12-Assembly part, 13-First tab part, 14-Second tab part, 2-Protection board body, 21-Assembly sidewall, 22-Conductive part, 3-Extension circuit board, 4-First electronic component, 5-Second electronic component; 100-Cell connection structure; 10-Cell body; 11-Cell tab; 111-Connecting section; 112-First bending section; 113-Second bending section; 114-Third bending section; 20-Conductive component; 21-First connecting part; 22-Second connecting part; 23-Third connecting part; 30-PCB; 31-Components; 32-Groove. Detailed Implementation

[0074] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0075] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0076] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0077] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0078] According to an embodiment of this application, a battery protection board is provided. The structure and working principle of the battery protection board will be described in detail below with reference to Figures 1 to 7.

[0079] According to the battery protection board provided in the embodiments of this application, the battery protection board includes a printed circuit board 100 and a flexible circuit board 200. In the embodiments, a protection circuit is provided on the printed circuit board 100, and the flexible circuit board 200 includes an integrally formed board body 210 and a conductive part 220. The board body 210 is electrically connected to the printed circuit board 100, and the conductive part 220 is located on one side of the board body 210 in the width direction. The projection of the printed circuit board 100 on the board body 210 does not coincide with the conductive part 220.

[0080] Thus, according to the battery protection board provided in this application embodiment, the electrical connection between the battery protection board and the tab 610 of the cell 600 no longer uses the nickel sheet in the prior art, but can use the conductive part 220 integrally formed with the board body 210 of the flexible circuit board 200. Since the projection of the printed circuit board 100 on the board body 210 does not coincide with the conductive part 220, that is, the conductive part 220 does not occupy the space on the printed circuit board 100, thus saving the space on the printed circuit board 100 that should have been occupied by the nickel sheet. At the same time, since the conductive part 220 and the board body 210 are an integral structure, there is no need for the conductive part 220 and the board body 210 to be connected by other connection methods such as welding, saving production steps in the production of the battery protection board and improving the production efficiency of the battery protection board.

[0081] In the embodiments, as mentioned above, the "integral board body 210 and conductive part 220" means that the board body 210 and the conductive part 220 are integral in the flexible circuit board 200, and are two parts of the flexible circuit board 200 as a whole, without the seam structure formed by the "other connection method" mentioned above. Therefore, once the flexible circuit board 200 is manufactured, it naturally has the aforementioned conductive part 220, and there is no process of connecting the separate conductive structure and board structure to form the conductive part 220 and the board body 210 during its production process.

[0082] In the embodiments, the printed circuit board 100 can be substantially formed as a PCB (Printed Circuit Board), and the flexible circuit board 200 can be substantially formed as an FPC (Flexible Printed Circuit Board).

[0083] In the embodiments, the printed circuit board 100 and the flexible circuit board 200 can be electrically connected by soldering using pads 310 pre-formed on the two boards, or by using a conductive structure between the two boards to electrically connect them. The latter method of electrical connection will be described in the following description.

[0084] Furthermore, the protection circuit can be an existing protection circuit, which is an existing structure and will not be elaborated here.

[0085] In the embodiment, the fact that the projection of the printed circuit board 100 on the board body 210 does not coincide with the conductive part 220 should be understood to include the following meaning: along the direction perpendicular to the board body 210, the projection of the printed circuit board 100 on the board body 210 does not coincide with the conductive part 220, so the conductive part 220 will not occupy the space on the printed circuit board 100.

[0086] According to the battery protection board provided in the embodiments of this application, the printed circuit board 100 may have a thickness direction 800, and the printed circuit board 100 may include a first surface 110 and a second surface 120 that are opposite to each other in the thickness direction 800. In the embodiments, the board body 210 may include a third surface 211 and a fourth surface 212 that are opposite to each other in the thickness direction 800. The battery protection board may also include a conductive layer 300, which is sandwiched between the first surface 110 and the third surface 211, and the conductive layer 300 can electrically connect the printed circuit board 100 and the flexible circuit board 200.

[0087] In this embodiment, the conductive layer 300 sandwiched between the printed circuit board 100 and the flexible circuit board 200 is the "second electrical connection method" mentioned above. In this embodiment, the conductive layer 300 essentially serves both a mechanical connection and an electrical connection. However, its mechanical connection differs from the laser welding performed on the two boards in the prior art, thus avoiding the laser welding process and the defects that may be caused by laser welding. At the same time, it eliminates the process area space for welding the flexible circuit board 200 to the printed circuit board 100, thereby improving the component layout space.

[0088] According to the battery protection board provided in the embodiments of this application, in the embodiments, the conductive layer 300 can be formed, for example, as a conductive adhesive film. Specifically, the conductive adhesive film can be, for example, an anisotropic conductive adhesive film. In the embodiments, referring to FIG6 and FIG7, a plurality of required pads 310 can be pre-fabricated on the first surface 110, and a plurality of pads 310 corresponding to the aforementioned pads 310 can be pre-fabricated on the third surface 211. Conductive positions corresponding to the positions of the aforementioned pads 310 can be formed in the anisotropic conductive adhesive film, and then the conductive positions of the conductive adhesive film are used to connect the corresponding pads 310 on both sides of the conductive position, thereby electrically connecting the printed circuit board 100 and the flexible circuit board 200.

[0089] In the embodiments, according to the battery protection board provided in this application, the conductive layer 300 can be formed as a solid layer cured from a colloid or paste. As an example, in the embodiments, the conductive layer 300 can be, for example, a fixed layer cured from solder paste. Similar to the connection method of the conductive adhesive film described above, in the embodiments, based on the pads 310 provided on the two boards, a stencil (exposing the pads 310 on the board when the stencil is covering the board) can be used to cover the board, and then solder paste is brushed on the outside of the stencil, so that the pads 310 are all covered with solder paste. Then, the other board is aligned with the first board, and the solder paste is dried and cured in an oven to connect the two boards together.

[0090] According to the battery protection board provided in the embodiments of this application, the board body 210 may further include a side portion extending between the third surface 211 and the fourth surface 212, and the conductive portion 220 is located on the side portion.

[0091] Thus, according to the battery protection board provided in this application embodiment, since the conductive portion 220 is located on the side of the board body 210, the conductive portion 220 will not occupy the dimension of the board body 210 in the thickness direction 800, which reduces the overall dimension of the battery protection board in the thickness direction 800. In the embodiment, as an example, the conductive portion 220 may be, for example, a sheet-like structure that extends outward from the side of the board body 210.

[0092] According to the battery protection board provided in the embodiments of this application, in the embodiments, the board body 210 has an overhang portion extending beyond the printed circuit board on one side in the width direction, and a conductive portion is disposed on the overhang portion.

[0093] The above example is not shown in the accompanying drawings. In this example, considering that the conductive portion 220 does not occupy the first surface 110 and the second surface 120 of the printed circuit board 100, the conductive portion 220 can also be disposed on the portion of the board body 210 that extends beyond the printed circuit board 100 in the width direction. As a further example, the conductive portion 220 can also be a sheet-like structure as mentioned above and located on the side of the extended portion.

[0094] Furthermore, in some examples of the battery protection board provided according to embodiments of this application, the conductive portion 220 can be disposed on the portion of the third surface 211 that extends beyond the third surface. That is, in this example, the conductive portion 220 can be the area where the outer edge of the conductive portion is in contact with the board body 210 (in fact, the two are an integral structure without a boundary), and this area can be located on the third surface 211, with the corresponding position being the extended portion. Alternatively, or simultaneously, the conductive portion 220 can also be disposed on the portion of the fourth surface 212 that extends beyond the fourth surface. For example, when there are multiple conductive portions 220, some conductive portions 220 can be located on the portion of the fourth surface 212 that extends beyond the fourth surface, and other conductive portions 220 can be located on the portion of the third surface 211 that extends beyond the third surface 110. According to the battery protection board provided according to embodiments of this application, the conductive portion 220 can extend at a predetermined angle to the third surface 211 to extend beyond the first surface 110.

[0095] Thus, according to the battery protection board provided in the embodiments of this application, the above-described extension of the conductive portion 220 helps to reduce the external area occupied by the battery protection board. In the embodiments, the conductive portion 220 is equivalent to bending towards the side where the first surface 110 is located based on the arrangement of the conductive portion 220 in Figures 1 to 4. The bent conductive portion 220 can, for example, be in the extended posture shown in Figure 5. As an example, the third surface 211 can be, for example, a plane, and the conductive portion 220 can, for example, form an obtuse angle with the third surface 211 or a right angle as shown in Figure 5. In other words, in the example given in Figure 5, the conductive portion 220 can be perpendicular to the board body 210 and also perpendicular to the printed circuit board 100.

[0096] According to the battery protection board provided in the embodiments of this application, the side of the conductive portion 220 away from the printed circuit board 100 can be used for electrical connection with the tab 610. In the embodiments, the tab 610 can be connected to the right side of the conductive portion 220 in FIG5, that is, the outer side of the conductive portion 220, by means such as soldering.

[0097] Referring further to Figures 8 and 10, regardless of whether the first surface 110 of the printed circuit board 100 faces the cell 600 or the second surface 120 faces the cell 600, in this embodiment, the tab 610 can extend laterally along the gap between the printed circuit board 100 and the cell 600, and then bend further toward the outside of the conductive portion 220 in a direction away from the cell 600. This means that, due to the bending of the conductive portion 220, the extension direction of the part of the tab 610 that is electrically connected to the tab 610 is the same as the extension direction of the conductive portion 220, so that the size of the battery protection board in the thickness direction 800 will not be increased after the soldering is completed.

[0098] According to the battery protection board provided in the embodiments of this application, the length of the conductive portion 220 extending at a predetermined angle to the third surface 211 can be from 2.0 mm to 20 mm. This length can essentially be the height of the bent conductive portion 220 in the above vertical example, which ensures that the conductive portion 220 can provide sufficient space for welding the tab 610. As an example, this height can be, for example, 2.0 mm, 3.0 mm, 4.0 mm, or 5.0 mm or even greater.

[0099] In an embodiment, the conductive portion 220 of the battery protection board provided according to the present application embodiment may have a sheet-like structure, and the thickness of the conductive portion 220 is 0.1 mm to 1 mm. As an example, the thickness of the conductive portion 220 is sufficient to ensure that the conductive portion 220 will not be broken down when the tab 610 is soldered to the conductive portion 220. In an embodiment, the thickness of the conductive portion 220 may be, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or greater.

[0100] According to the battery protection board provided in the embodiments of this application, the battery protection board may further include a plurality of components 400 forming the protection circuit as described above, and the plurality of components 400 are disposed on the second surface 120. In the embodiments, these components 400 may include, for example, IC (Integrated Circuit, i.e., a chip) and MOS (i.e., MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor) components 400.

[0101] According to the battery protection board provided in the embodiments of this application, the battery protection board may further include a first package 500. The first package 500 may cover the outer side of a portion of the conductive portion 220, the outer side of the aforementioned plurality of components 400, and the outer side of the second surface 120. The side of the conductive portion 220 away from the printed circuit board 100 is exposed for electrical connection of the tab 610. As an example, the first package 500 may be formed, for example, by injection molding of PUR (Polyurethane Reactive), UV (Ultraviolet), or PA (Polyamide) materials, or by injection molding of EMC (Epoxy Molding Compound), or by 3D printing.

[0102] However, in the example not shown, the first package may only cover the outer side of the second surface, or the first package may only cover the outer side of the aforementioned portion of the conductive part 220.

[0103] According to the battery protection board provided in the embodiments of this application, the number of conductive portions 220 can be multiple, and the multiple conductive portions 220 can be spaced apart along the length direction 900 of the board body. The conductive portions 220 may include, for example, a first conductive portion 220 and a second conductive portion 220. The first conductive portion 220 and the second conductive portion 220 can be arranged spaced apart from each other along the aforementioned length direction 900. The tabs 610 may include a positive tab 610 and a negative tab 610. The first conductive portion 220 can be used for electrical connection with the positive tab 610, and the second conductive portion 220 can be used for electrical connection with the negative tab 610. Referring to Figures 1 to 3, the number of first conductive portions 220 can be, for example, two, and the number of second conductive portions 220 can also be, for example, two.

[0104] According to an embodiment of this application, a battery is provided, which includes the battery protection board as described above, and also includes the beneficial effects described above, which will not be repeated here.

[0105] According to the battery provided in the embodiments of this application, the battery may further include a cell 600, and the tab 610 of the cell 600 may be electrically connected to the conductive part 220. The connection method has been described above and will not be repeated here.

[0106] According to the battery provided in the embodiments of this application, the battery may further include a second package 700. The second package 700 may cover the outer side of the head of the cell 600 and the outer side of the battery protection plate. The material and forming method of the second package 700 may be the same as those of the first package 500, and will not be described again here. In the embodiments, the first package 500 described above can improve the strength of the battery protection plate and provide insulation performance for the battery protection plate. Here, the second package 700 can improve the strength of the battery protection plate and the cell 600 as a whole and provide insulation performance for the battery. Based on this example, a specific packaging example of the battery will be described below with reference to Figures 8 to 15.

[0107] In an embodiment, the battery may include a plurality of cells 600, which may be electrically connected to a plurality of conductive portions 220. As an example, as mentioned above, the conductive portion 220 may include, for instance, a first conductive portion and a second conductive portion. The first conductive portion may be used to weld to the positive electrode tab of the cell 600, and the second conductive portion may be used to weld to the negative electrode tab of the cell 600. Thus, each cell 600 may be provided with a pair of first and second conductive portions. Therefore, in the example where the battery includes a plurality of cells 600, multiple pairs of first and second conductive portions are provided in a one-to-one correspondence with the aforementioned plurality of cells 600.

[0108] As shown in Figure 3, in this embodiment, the first conductive portion and the second conductive portion can be arranged adjacent to each other, and the two pairs of first conductive portions and second conductive portions can be spaced apart in the aforementioned length direction. In this embodiment, as an example, the printed circuit board 100, the flexible circuit board 200, and the conductive layer 300 can each have corresponding notches, which are used to avoid the sealing edges of adjacent battery cells 600. In this embodiment, corresponding to the positions between adjacent battery cells 600, the printed circuit board 100, the flexible circuit board 200, and the conductive layer 300 are all provided with the aforementioned notches, and on both sides of the notches are respectively arranged two pairs of first conductive portions and second conductive portions corresponding to the two battery cells 600.

[0109] Referring to Figure 3, a notch as shown above is provided in Figure 3. In the example given in Figure 3, there can be two cells 600, with two pairs of first conductive parts and second conductive parts provided accordingly.

[0110] As shown in Figure 8, the battery protection board and the battery cell 600 are placed horizontally, with the component 400 facing away from the battery cell 600. In this example, the first package 500 and the second package 700 are not provided in the battery.

[0111] As shown in Figure 9, this example shows the battery protection board and the battery cell 600 placed horizontally. Based on Figure 8, in this example, the battery is provided with a second package 700, but the first package 500 is not provided.

[0112] As shown in Figure 10, the battery protection board and the battery cell 600 are placed horizontally, with the component 400 facing the battery cell 600. In this example, the first package 500 and the second package 700 are not provided in the battery.

[0113] As shown in Figure 11, Figure 11 shows an example of the battery protection board and the battery cell 600 being placed horizontally. Based on Figure 10, in this example, the battery is provided with a second package 700, but the first package 500 is not provided.

[0114] As shown in Figure 12, the battery protection board and the battery cell 600 are placed horizontally, with the component 400 facing away from the battery cell 600. In this example, the battery is provided with a first package 500, but no second package 700 is provided.

[0115] As shown in Figure 13, the battery protection board and the battery cell 600 are placed horizontally, with the component 400 facing away from the battery cell 600. Based on Figure 12, in this example, the battery is provided with a first package 500 and a second package 700.

[0116] As shown in Figure 14, the battery protection board and the battery cell 600 are placed horizontally, with the component 400 facing the battery cell 600. In this example, a first package 500 is provided in the battery, but a second package 700 is not provided.

[0117] As shown in Figure 15, Figure 14 shows an example of a battery protection board and a battery cell 600 placed horizontally, with the component 400 facing the battery cell 600. Based on Figure 14, in this example, a first package 500 and a second package 700 are provided in the battery.

[0118] Furthermore, in an example not shown, compared to a conventional battery protection board solution where the nickel sheet and component 400 are placed on opposite sides, the battery protection board and battery provided according to the embodiments of this application can save head thickness space when the battery protection board and cell 600 are placed horizontally; and can save battery length space when the battery protection board and cell 600 are placed vertically (not shown in the figure).

[0119] According to an embodiment of this application, an electronic device is provided. The electronic device includes the battery as described above, and also includes the beneficial effects as described above, which will not be repeated here. The electronic device may be, for example, a mobile phone.

[0120] This application discloses a battery, as shown in FIG16. The battery includes: a battery protection board 2, which has a top surface 22 along its thickness direction on which components 4 are arranged; a battery cell 3, including a tab 31, which is welded to one side of the battery protection board 2 in its width direction; and a connector 1, including a first connecting part 11 and a second connecting part 12 connected to each other. The first connecting part 11 is located between the battery protection board 2 and the tab 31 and is welded to the tab 31. The second connecting part 12 has a welding surface 122, the area of ​​which is greater than or equal to 2 mm. 2 The welding surface 122 is welded to the top surface.

[0121] In this embodiment, the welding surface 122 of the second connecting portion 12 is welded to the top surface 22 of the battery protection board 2, and the area of ​​the welding surface 122 is greater than or equal to 2 mm. 2 This design results in a larger contact area between the second connecting part 12 and the battery protection board 2, leading to a tighter fit and reducing the difficulty of welding the connector 1 to the battery protection board 2. The welding tab 31 is located on one side of the battery protection board 2 in its width direction, which avoids the tab 31 interfering with the arrangement of components 4 on the top surface 22 and increases the space available for component placement on the circuit board.

[0122] The battery described in this embodiment can be used in devices that require power, such as mobile phones and automobiles. The battery may include a cell 3 and a battery protection board 2. The cell 3 is the energy storage part of the battery, and the battery protection board 2 is an integrated circuit board that protects the battery from over-discharge, over-charge, over-current, and short circuit.

[0123] Specifically, the battery protection board 2 can be a printed circuit board (PCB). Components are arranged on the battery protection board 2 to form pulse code modulation (PCM). Components 4 can be resistors, capacitors, control components, etc.

[0124] Specifically, the battery protection board 2 has two perpendicular length directions, width directions and thickness directions, as shown in Figures 16 and 22. The length direction is parallel to the direction of arrow S3, the width direction is parallel to the direction of arrow S2, and the thickness direction is parallel to the direction of arrow S1.

[0125] Specifically, the thickness direction of the battery protection board 2 can be consistent with the height direction of the battery, the length direction of the battery protection board 2 can be consistent with the width direction of the battery, and the width direction of the battery protection board 2 can be consistent with the thickness direction of the battery.

[0126] Furthermore, the battery cell 3 has a cell body 32 and a tab 31, with the tab 31 protruding from one end of the cell body 32. The battery protection plate 2 has two large surfaces along its thickness direction, namely a top surface 22 and a bottom surface. The bottom surface is connected to the cell body 32, and the top surface 22 is used to arrange the components 4.

[0127] Specifically, the battery further includes a connector 1, which may include a first connecting part 11 and a second connecting part 12 connected to each other. The tab 31 is located on one side of the battery protection plate 2 in its width direction. The first connecting part 11 is located between the battery protection plate 2 and the tab 31. The first connecting part 11 can be welded to the tab 31 of the cell 3. The second connecting part 12 may have a welding surface 122. The second connecting part 12 is welded to the top surface 22 of the battery protection plate 2 through the welding surface 122, so that the connector 1 can play the role of conversion, so as to realize that the tab 31 is electrically connected to the circuit board through the connector 1.

[0128] Specifically, the first connecting part 11 and the second connecting part 12 can be integrally formed to ensure the structural stability of the connector 1. In other cases, the first connecting part 11 and the second connecting part 12 can also be fixed by splicing, and this application embodiment does not specifically limit this.

[0129] Specifically, along the width direction of the battery protection plate 2, the second connecting portion 12 protrudes from the first connecting portion 11. In some embodiments, as shown in FIG. 17, the second connecting portion 12 protrudes from one end of the first connecting portion 11, making the connector 1 L-shaped; in other embodiments, the second connecting portion 12 protrudes from the middle region of the first connecting portion 11, making the connector 1 T-shaped; or, as shown in FIG. 18 to FIG. 21, the second connecting portion 12 protrudes from the central region of the first connecting portion 11, making the connector 1 nail-shaped. In the embodiments of this application, the structure of the connector 1 is quite diverse.

[0130] Specifically, the pull-out force F = weld area A * weld strength σ. With the weld strength σ remaining constant, the larger the weld area A, the larger the pull-out force F, resulting in a tighter fit and a more stable connection. In the embodiments of this application, the area of ​​the weld surface 122 is greater than or equal to 2 mm². 2 This can increase the pull-out force that the connector 1 and the battery protection board 2 can withstand, making the connection between the connector 1 and the battery protection board 2 more reliable.

[0131] Furthermore, as shown in Figures 16 to 23, the welding surface 122 of the second connecting part 12 is welded to the top surface 22 of the battery protection board 2, so that the second connecting part 12 can be welded to the large surface of the battery protection board 2. This improves the convenience of placing the second connecting part 12 on the top surface 22 of the battery protection board 2. Moreover, the contact area between the second connecting part 12 and the top surface 22 of the battery protection board 2 is large, which can prevent the second connecting part 12 from being skewed during welding. In addition, the welding process is less difficult, the welding yield is higher, and the welding cost is lower.

[0132] Specifically, the first connecting part 11 and the electrode tab 31 can be welded by spot welding or bonded by conductive adhesive, etc. This application embodiment does not specifically limit this.

[0133] Specifically, the second connecting part 12 is welded to the top surface 22 of the battery protection board 2 through the welding surface 122, so that the first connecting part 11 is located between the electrode tab 31 welding and the battery protection board 2. The first connecting part 11 can separate the battery protection board 2 and the electrode tab 31, which can prevent the electrode tab 31 from interfering with the components 4 on the top surface 22 of the battery protection board 2, protect the components 4 from being damaged, and increase the space for the components on the battery protection board 2.

[0134] Specifically, as shown in Figure 22, pads 21 can be arranged on the top surface 22 of the battery protection board 2 to weld the welding surface 122 of the second connecting part 12. The pads 21 can be arranged on the top surface 22 of the battery protection board 2 by electroplating, or by surface treatment or other processes. This embodiment does not specifically limit this. The distance between the pads 21 and the components 4 can be greater than or equal to 0.1 mm, so that the components 4 can be placed close to the pads 21, and the space for component placement on the battery protection board 2 is relatively large.

[0135] Specifically, the surface of the first connecting portion 11 away from the second connecting portion 12 can be flat to further improve the convenience and reliability of welding the first connecting portion 11 to the tab 31. The thickness of the first connecting portion 11 along the width direction of the battery protection plate 2 can be designed according to actual needs; this embodiment does not specifically limit this.

[0136] In one embodiment, the length of the second connecting portion 12 can be greater than or equal to 2 mm, and the width of the second connecting portion can be greater than or equal to 1 mm, so as to ensure that the surface contact of the welding surface 122 of the second connecting portion 12 is greater than or equal to 2 mm. 2 This is to enhance the tightness of the fit between the second connecting part 12 and the battery protection board 2.

[0137] Specifically, the thickness of the second connecting part 12 can be 2mm, 2.8mm, 3mm, 4mm, 5.5mm, etc. The second connecting parts 12 can be arranged with equal wall thickness, and the welding surface 122 of the second connecting part 12 can be a plane, so as to further improve the convenience and reliability of welding the second connecting part 12 to the top surface 22 of the battery protection board 2.

[0138] In one embodiment, the battery cell 3 includes a battery cell body 32 connected to a tab 31; the tab 31 protrudes from one end of the battery cell body 32; and the battery protection plate 2 is disposed between the second connection portion 12 and the battery cell body 32.

[0139] In this embodiment, the battery protection board 2 is disposed between the second connecting part 12 and the cell body 32. Since the tab 31 is welded to the first connecting part 11, the tab 31 is arranged on one side of the battery protection board 2, which can avoid the tab 31 from overlapping with the battery protection board 2, thereby giving space to the cell body 32, increasing the arrangement space of the cell body 32, and facilitating the increase of battery capacity.

[0140] Specifically, the height direction of the cell body 32 is consistent with the thickness direction of the battery protection board 2. The tab 31 can protrude from one end of the cell body 32 in its height direction. When the total length of the battery remains unchanged, and the height space occupied by the battery protection board 2 and the connector 1 is small, the arrangement space of the cell body 32 is large, which is conducive to increasing the battery capacity.

[0141] In one embodiment, along the width direction of the battery protection plate 2, the orthographic projection of the second connecting portion 12 falls within the orthographic projection of the first connecting portion 11, so that the connector 1 can be nail-shaped, which facilitates the reduction of the weight of the connector 1.

[0142] In one embodiment, along the length of the battery protection plate 2, the extension length of the first connecting portion 11 is greater than the extension length of the second connecting portion 12.

[0143] In this embodiment, the first connecting part 11 has a longer extension length in the length direction of the battery protection board 2, which facilitates increasing the welding area between the first connecting part 11 and the tab 31; the second connecting part 12 has a shorter extension length in the length direction of the battery protection board 2, which can prevent the second connecting part 12 from interfering with the components 4 on the battery protection board 2.

[0144] In one embodiment, the first connecting portion 11 includes a first sub-connecting portion 111 and a second sub-connecting portion 112 connected to each other; along the thickness direction of the battery protection plate 2, the first sub-connecting portion 111 is located on one side of the second connecting portion 12, and the second sub-connecting portion 112 is located on the other side of the second connecting portion 12; the first sub-connecting portion 111 and / or the second sub-connecting portion 112 are connected to the tab 31.

[0145] In this embodiment, along the thickness direction of the battery protection plate 2, the first sub-connection portion 111 is located on one side of the second connection portion 12, and the second sub-connection portion 112 is located on the other side of the second connection portion 12, so that the extension length of the first connection portion 11 in the thickness direction of the battery protection plate 2 is relatively long, which facilitates increasing the welding area between the first connection portion 11 and the tab 31 and improving the tightness of the fit between the first connection portion 11 and the tab 31.

[0146] In one embodiment, the thickness of the second sub-connector 112 is greater than the thickness of the first sub-connector 111 along the width direction of the battery protection plate 2, which can increase the structural strength of the second sub-connector 112 and improve the stability of the welding between the connector 1 and the tab 31.

[0147] Specifically, the first sub-connection part 111 can be disposed between the battery protection plate 2 and the tab 31. The first sub-connection part 111 is thin, which makes it easier to reduce the overall thickness of the battery.

[0148] Specifically, the connection between the connector 1 and the electrode 31 can be achieved by welding the second sub-connecting part 112 to the electrode 31, or by welding the second sub-connecting part 112 to the electrode 31 and the first sub-connecting part 111 to the electrode 31.

[0149] Specifically, the second sub-connecting portion 112 can be arranged with equal thickness or with a locally thicker thickness; this application embodiment does not specifically limit this.

[0150] In one embodiment, both the first sub-connecting part 111 and the second sub-connecting part 112 are connected to the electrode tab 31, which can increase the welding area between the connector 1 and the electrode tab 31, improve the convenience of welding and fixing the connector 1 and the electrode tab 31, and improve the reliability of the fixed connection between the connector 1 and the electrode tab 31.

[0151] In one embodiment, the second sub-connection portion 112 includes a reinforcing portion 1121. Along the width direction of the battery protection plate 2, the thickness of the reinforcing portion 1121 is greater than the thickness of the first sub-connection portion 111. The second connection portion 12 has a first surface 121 on the side facing the reinforcing portion 1121, and the reinforcing portion 1121 has a second surface 1122 on the side facing the second connection portion 12. The second surface 1122 is set at an angle to the first surface 121, and the angle is greater than or equal to 90°.

[0152] In this embodiment, the thickness of the reinforcing part 1121 is greater than the thickness of the first sub-connecting part 111, and the reinforcing part 1121 can enhance the structural strength of the second sub-connecting part 112. The second surface 1122 is set at an angle to the first surface 121, and the angle is greater than or equal to 90°, which helps to ensure the structural strength of the connection between the second connecting part 12 and the reinforcing part 1121.

[0153] In one embodiment, the length of the reinforcing part 1121 along the length direction of the battery protection plate 2 is equal to or less than the length of the second connecting part 12, which can reduce the weight of the connector 1 while ensuring the structural strength of the second sub-connecting part 112.

[0154] In one embodiment, the connection between the second connecting part 12 and the first connecting part 11 is a rounded chamfer 14, and the radius of the rounded chamfer 14 is less than or equal to 0.5 mm.

[0155] In this embodiment, the connection between the second connecting part 12 and the first connecting part 11 is rounded with a chamfer 14, allowing for a smooth connection between the two parts. The radius of the chamfer 14 is less than or equal to 0.5 mm, which helps to ensure the contact area between the second connecting part 12 and the top surface 22 of the battery protection board 2, reducing the welding difficulty of welding the second connecting part 12 to the top surface 22 of the battery protection board 2 via the welding surface 122.

[0156] The battery described in this application embodiment has at least the following advantages:

[0157] In this embodiment, the welding surface of the second connection portion is welded to the top surface of the battery protection board, and the area of ​​the welding surface is greater than or equal to 2 mm². 2 This design results in a larger contact area between the second connecting part and the battery protection board, leading to a tighter fit and reducing the difficulty of welding the connecting part to the battery protection board. Welding the tab to one side of the battery protection board along its width avoids interference with the arrangement of components on the top surface, increasing the space available for component placement on the circuit board.

[0158] This application also discloses an electronic device including the battery described above.

[0159] The electronic devices described in the embodiments of this application include, but are not limited to, mobile phones, automobiles, etc.

[0160] The electronic device described in this application has at least the following advantages:

[0161] In this embodiment, the welding surface of the second connection portion is welded to the top surface of the battery protection board, and the area of ​​the welding surface is greater than or equal to 2 mm². 2 This design results in a larger contact area between the second connecting part and the battery protection board, leading to a tighter fit and reducing the difficulty of welding the connecting part to the battery protection board. The tab is located on one side of the battery protection board along its width, preventing interference with the arrangement of components on the top surface and increasing the space available for soldering components on the circuit board.

[0162] This application provides a battery protection board, as shown in Figures 24 and 25. The battery protection board includes a protection board body 2. The end of the battery cell 1 with a tab 11 in the length direction is the head of the battery cell 1. The protection board body 2 is placed vertically on the head of the battery cell 1 and is encapsulated in the head of the battery cell 1 by an encapsulation structure. The vertical placement of the protection board body 2 means that the plate surface of the protection board body 2 is perpendicular to the length direction of the battery cell 1, that is, the thickness direction of the protection board body 2 extends along the length direction of the battery cell 1.

[0163] As shown in Figure 27, the protective plate body 2 includes two surfaces (i.e., the first surface and the second surface hereinafter referred to as the first surface and the second surface) that are opposite each other along its own thickness direction, and a circumferential sidewall connecting the two surfaces. The circumferential sidewall of the protective plate body 2 includes a mounting sidewall 21. It can be understood that the mounting sidewall 21 extends along the thickness direction of the protective plate body 2, i.e., the length direction of the battery cell 1. Specifically, the protective plate body 2 has a predetermined width along the thickness direction of the battery cell 1, and the mounting sidewall 21 is located on one side of the width direction of the protective plate body 2.

[0164] In this embodiment, the mounting sidewall 21 is provided with a conductive portion 22 for electrical connection with the tab 11 of the battery cell 1. Therefore, by providing the conductive portion 22 on the mounting sidewall 21 on one side of the width direction of the protection board body 2, when the tab 11 of the battery cell 1 is assembled with the protection board body 2, neither the tab 11 nor the conductive portion 22 needs to be bent 180° between the protection board body 2 and the battery cell 1. This effectively reduces the space occupied by the connection between the tab 11 and the protection board body 2 in the length direction of the battery cell 1, thereby reducing the size of the encapsulation structure of the protection board body 2 in the length direction of the battery cell 1. Consequently, under the constraint of a given battery size, the length of the battery cell 1 can be extended to a certain extent to increase the battery capacity.

[0165] Meanwhile, as shown in Figure 28, the battery protection board also includes a variety of electronic devices. Some of these electronic devices are located on the main body 2 of the protection board and are defined as the first electronic device 4. The other electronic devices are located on the extension circuit board 3 described below and are defined as the second electronic device 5.

[0166] Regarding the arrangement of the first electronic device 4, in this embodiment, as an example, the body of the first electronic device 4 is partially or entirely embedded inside the protective plate body 2. Therefore, compared to the prior art where the first electronic device 4 is arranged on one side of the protective plate body 2 in the thickness direction, the arrangement of the first electronic device 4 in this embodiment avoids the first electronic device 4 occupying additional space in the length direction of the battery, thereby further reducing the size of the protective plate body 2's packaging structure in the length direction of the cell 1, and thus further increasing the battery capacity.

[0167] In this embodiment, as illustrated below, there are multiple first electronic devices 4, which are spaced apart and embedded inside the protective plate body 2.

[0168] Regarding the arrangement of the second electronic device 5, in this embodiment, as an example, the protection board body 2 is encapsulated in the head of the battery cell 1 by a packaging structure. One end of the protection board body 2 has an extension circuit board 3 extending out of the packaging structure, and the second electronic device 5 is arranged on the extension circuit board 3. Therefore, by moving a portion of all the electronic devices of the battery protection board out of the packaging structure and placing them on the extension circuit board 3 outside the packaging structure, the space occupied by the electronic device arrangement in the packaging structure can be effectively reduced, allowing the packaging structure to have a smaller size, thus creating conditions for increasing battery capacity.

[0169] Regarding the arrangement of the second electronic device 5 on the extension circuit board 3, in this embodiment, the following is an example: there are multiple second electronic devices 5. The multiple second electronic devices 5 can be mounted on the extension circuit board 3 using surface mount technology, and the second electronic devices 5 can be encapsulated on the extension circuit board 3 by an adhesive layer or a plastic encapsulation layer to reinforce the assembly strength.

[0170] Alternatively, multiple second electronic devices 5 can be first mounted on a carrier board using surface mount technology to integrate them into a module, and then the entire module can be mounted onto the extension circuit board 3 using surface mount technology. All second electronic devices 5 can be integrated into one module, or they can be divided into multiple modules according to their functions.

[0171] In one embodiment of this application, as illustrated below, one side surface of the protection board body 2 in the thickness direction is the first surface, and the first surface of the protection board body 2 faces the battery cell 1.

[0172] As shown in Figure 25, the tab 11 of the battery cell 1 includes an assembly portion 12 and a first tab portion 13. Specifically, after the tab 11 of the battery cell 1 extends from the top sealing edge of the battery cell 1, it first forms the first tab portion 13. The first tab portion 13 continues to extend outward to form the assembly portion 12. The assembly portion 12 is bent away from the battery cell 1 relative to the first tab portion 13, so that the first tab portion 13 and the assembly portion 12 are connected in an L-shape. The protective plate body 2 is located in the L-shaped space formed by the first tab portion 13 and the assembly portion 12, and the conductive portion 22 on the assembly sidewall 21 of the protective plate body 2 is attached to and welded to the assembly portion 12 to form an electrical connection. The first surface of the protective plate body 2 is opposite to the first tab portion 13.

[0173] In this embodiment, the conductive part 22 extends toward one side of the battery cell 1 to form a first extension. The first extension is bent toward the first surface to be in contact with the first surface, so that the first extension is in contact with the second tab and welded together, thereby increasing the connection area between the tab 11 of the battery cell 1 and the protective plate body 2 to a certain extent and increasing the connection strength.

[0174] In this embodiment, as illustrated below, a first clearance groove is formed on the first surface of the protection board body 2, which is opposite to the first extension to accommodate the first extension; as illustrated below, the first extension does not protrude beyond the first surface of the protection board body 2. This avoids the first extension occupying space in the encapsulation structure of the protection board body 2 along the length of the cell 1.

[0175] In this embodiment, as illustrated in FIG26, the side surface of the protective plate body 2 away from the battery cell 1 along its own thickness direction is the second surface; the conductive part 22 extends to the side away from the battery cell 1 and forms a second extension, which is bent toward the second surface to be in contact with the second surface.

[0176] The tab 11 includes an assembly portion 12 and a second tab portion 14. The assembly portion 12 is attached to and welded to the conductive portion 22 to form an electrical connection. The second tab portion 14 extends from the side of the assembly portion 12 away from the battery cell 1, and the second tab portion 14 is bent relative to the assembly portion 12, so that the second tab portion 14 and the assembly portion 12 are connected in an L-shape. The second tab portion 14 is also attached to and welded to the second extension portion. This increases the connection area between the tab 11 of the battery cell 1 and the protection plate body 2, thereby increasing the connection strength.

[0177] In this embodiment, as illustrated below, a second clearance groove is formed on the second surface of the protective board body 2, which is opposite to the second extension to accommodate the second extension; as illustrated below, the second extension does not protrude from the second surface of the protective board body 2. This avoids the second extension occupying space in the encapsulation structure of the protective board body 2 along the length of the cell 1.

[0178] It should be noted that, in the embodiments of this application, the conductive portion 22 may only extend to form a first extension portion or a second extension portion, or it may simultaneously form a first extension portion and a second extension portion.

[0179] When the conductive portion 22 extends only to form the first extension portion, the electrode tab 11 includes the first electrode tab portion 13 and the assembly portion 12.

[0180] When the conductive portion 22 extends only to form the second extension portion, or when the conductive portion 22 extends to form both the first extension portion and the second extension portion, the electrode tab 11 includes the first electrode tab portion 13, the assembly portion 12, and the second electrode tab portion.

[0181] This application provides a battery that includes the battery protection board of any of the above embodiments. Therefore, the battery also has all the beneficial effects of the battery protection board, which will not be described in detail here.

[0182] This application provides an electronic device that includes the battery described above. Therefore, the electronic device also has all the beneficial effects of a battery protection board, which will not be described in detail here.

[0183] The following describes in detail the overall structure, working principle, and technical effects of the battery cell connection structure provided in this application through embodiments and in conjunction with the accompanying drawings.

[0184] Referring to Figure 29, the battery cell connection structure 100 provided in this application is used in portable electronic device batteries with extremely limited internal space requirements, such as mobile phones. Specifically, it is disposed between the PCB 30 (printed circuit board) and the battery cell to achieve a stable and compact electrical connection between the battery cell tab 11 and the PCB 30.

[0185] The battery cell connection structure 100 includes a PCB 30, a conductive element 20, and a battery cell tab 11. The conductive element 20 includes a first connecting portion 21, a second connecting portion 22, and a third connecting portion 23 connected in sequence. The second connecting portion 22 is located at one end of the PCB 30 in the width direction. The first connecting portion 21 and the third connecting portion 23 are bent and attached to the PCB 30 on both sides in the thickness direction, respectively. The battery cell tab 11 is connected to the side of the first connecting portion 21, the second connecting portion 22, or the third connecting portion 23 away from the PCB 30.

[0186] It is understandable that when PCB30 is considered as a cuboid with length, width, and thickness, it has two faces perpendicular to the length direction, two faces perpendicular to the width direction, and two planes perpendicular to the thickness direction. The end of PCB30 in the width direction refers to the end region perpendicular to the width direction. The two faces of PCB30 in the thickness direction refer to the two planes perpendicular to the thickness direction.

[0187] By setting up a U-shaped conductive element 20 structure that is integrally formed by the first connecting part 21, the second connecting part 22, and the third connecting part 23, the conductive element 20 occupies only the space along the length of the battery with the single thickness of the first connecting part 21. This design optimizes the space occupied by the traditional L-shaped conductive element 20 after bending, which requires twice the thickness (the thickness of the conductive element 20 body plus the bending radius thickness), to only the material thickness of the first connecting part 21, thereby minimizing the space occupied along the length of the battery.

[0188] In this embodiment, the battery cell tab 11 can be welded and fixed to any one of the first connecting part 21, the second connecting part 22, and the third connecting part 23 to realize the connection between the battery cell tab 11 and the PCB 30.

[0189] It should be noted that in this embodiment, the third connecting portion 23 is disposed on the side of the PCB30 where the component 31 is mounted, and its thickness is controlled within the height of the space occupied by the tallest component 31 on the PCB30. This means that the presence of the third connecting portion 23 does not additionally increase the total height of the PCB30 in the battery length direction.

[0190] In this embodiment, the length of the first connecting portion 21 is greater than the length of the third connecting portion 23 in the width direction of the PCB 30. By designing the first connecting portion 21 to be larger than the third connecting portion 23 in the width direction of the PCB 30, a more stable connection structure can be provided on the side of the PCB 30, reducing the difficulty of the soldering process and improving the soldering quality. Furthermore, the third connecting portion 23 can adopt a relatively compact size design, effectively avoiding the risk of spatial interference with other components 31 on the PCB 30 while ensuring reliable connection strength with the PCB 30.

[0191] Furthermore, the battery cell tab 11 includes a connecting segment 111, a first bending segment 112, and a second bending segment 113 connected in sequence. The end of the connecting segment 111 away from the first bending segment 112 is connected to the battery cell body 10. The first bending segment 112 is bent toward the battery cell body 10 along a first direction so that the first bending segment 112 is parallel to the end of the battery cell body 10.

[0192] The battery cell connection structure 100 of this application embodiment has different connection structures depending on the different connection positions between the battery cell tab 11 and the conductive member 20, including:

[0193] Referring to Figure 29, when the cell tab 11 is connected to the first connecting portion 21, the second bending segment 113 bends along a second direction opposite to the first direction and is welded and fixed to the first connecting portion 21. The connecting segment 111 is connected to the cell body 10, the first bending segment 112 bends towards the cell body 10 along the first direction, and the second bending segment 113 bends along a second direction opposite to the first direction, so that the second bending segment 113 is arranged parallel to the first bending segment 112. The second bending segment 113 is welded and fixed to the first connecting portion 21, forming a stable Z-shaped connection structure. This structure allows the cell tab 11 to be bent compactly and attached to the surface of the PCB 30, minimizing the space occupied in the length direction of the battery.

[0194] Referring to Figure 32, when the battery cell tab 11 is connected to the second connecting portion 22, the battery cell tab 11 includes a connecting section 111, a first bending section 112, and a second bending section 113 connected in sequence. The connecting section 111 is connected to the battery cell body 10. The first bending section 112 bends towards the battery cell body 10 along a first direction, and the second bending section 113 bends along a third direction perpendicular to the first direction, so that the second bending section 113 is perpendicular to the first bending section 112. The second bending section 113 is welded and fixed to the second connecting portion 22, forming an L-shaped connection structure. This structure allows the battery cell tab 11 to be directly connected to the conductive component 20 from the side, simplifying the connection path and improving assembly efficiency.

[0195] Referring to Figure 33, when the battery cell tab 11 is connected to the third connecting portion 23, the battery cell tab 11 includes a connecting segment 111, a first bending segment 112, a second bending segment 113, and a third bending segment 114 connected in sequence. The connecting segment 111 is connected to the battery cell body 10. The first bending segment 112 bends towards the battery cell body 10 along a first direction. The second bending segment 113 bends along a third direction perpendicular to the first direction. The third bending segment 114 bends along a second direction opposite to the first direction, forming a U-shaped connecting structure. The third bending segment 114 is welded and fixed to the third connecting portion 23. This structure, through three bends, enables the battery cell tab 11 to reliably connect to the component 31 side of the PCB 30 while maintaining good structural stability.

[0196] Specifically, the first bent section 112 is bonded to the cell body 10. By bonding and fixing the first bent section 112 to the cell body 10, the position and shape of the cell tab 11 after bending can be effectively constrained, preventing it from shifting or deforming due to vibration or impact during battery use, thus ensuring the stability of the tab structure.

[0197] The battery cell connection structure 100 of this application embodiment has different bonding structures between the conductive element 20 and the PCB 30 depending on the different connection positions between the battery cell tab 11 and the conductive element 20. Specifically, the first connection part 21 is bonded to the PCB 30, and / or the third connection part 23 is bonded to the PCB 30. Three cases of this application are listed below:

[0198] Referring to Figure 29, specifically, when the battery cell tab 11 is connected to the first connecting part 21, the third connecting part 23 and the PCB 30 are bonded together. It can be understood that during the assembly process of this embodiment, the PCB 30 can be first bonded and fixed to the third connecting part 23 of the conductive component 20 in its unfolded state. After the battery cell tab 11 is welded and fixed to the first connecting part 21, the third connecting part 23 is then bent relative to the second connecting part 22, so that the conductive component 20 ultimately forms a U-shaped structure that wraps around the end of the PCB 30. This step-by-step assembly method reduces the overall assembly difficulty, improves production efficiency, and ultimately forms a compact and reliable battery cell connection structure 100.

[0199] Referring to Figure 32, when the battery cell tab 11 is connected to the second connecting portion 22, to ensure the stability of the U-shaped structure under welding stress, both the first connecting portion 21 and the third connecting portion 23 are bonded to the PCB 30 with structural adhesive. This double-sided bonding configuration creates a stronger connection between the conductive component 20 and the PCB 30, effectively dispersing the mechanical stress generated during welding and preventing displacement or deformation of the conductive component 20, thereby ensuring the welding quality between the battery cell tab 11 and the second connecting portion 22. Of course, in this embodiment, the PCB 30 can be selectively bonded to either the first connecting portion 21 or the third connecting portion 23 with structural adhesive.

[0200] Referring to Figure 33, when the battery cell tab 11 is connected to the third connecting part 23, the first connecting part 21 is bonded to the PCB 30 with structural adhesive, while the third connecting part 23 is welded to the third bent section 114 of the battery cell tab 11. This configuration provides the main support for the entire conductive component 20 through the bonding of the first connecting part 21, while achieving electrical connection through the welding of the third connecting part 23 to the tab, thus ensuring structural stability while achieving efficient space utilization.

[0201] Please refer to Figure 30, which is a structural schematic diagram of another embodiment of this application. In order to further reduce the space occupied by the conductive component 20 in the length direction of the battery, a groove 32 is provided on one side of the PCB 30 in the thickness direction, and the portion of the first connecting part 21 attached to the PCB 30 in the thickness direction is accommodated in the groove 32.

[0202] It is understood that in this embodiment, the thickness direction of PCB30 is consistent with the length direction of the battery. By providing the groove 32, the first connection portion 21 of the conductive component 20 can be embedded and accommodated inside the PCB30, thereby completely hiding the thickness of the first connection portion 21 within the thickness range of the PCB30, thus achieving optimal space utilization in the length direction of the battery.

[0203] Specifically, in this embodiment, the depth of the groove 32 in the thickness direction of the PCB 30 is greater than or equal to the thickness of the first connecting portion 21. It can be understood that by setting the depth of the groove 32 to be at least equal to the thickness of the first connecting portion 21, it can be ensured that the first connecting portion 21 can be completely accommodated in the groove 32, so that its upper surface is not higher than the surface of the PCB 30 where the groove 32 is located.

[0204] Further, please refer to Figure 31, which is a structural schematic diagram of another embodiment of this application. In this embodiment, in order to further reduce the space occupied by the battery tab 11 in the battery length direction, the battery tab 11, after being connected to the conductive component 20, is partially accommodated in the groove 32. Specifically, the second bent section 113 is accommodated in the groove 32. By embedding the second bent section 113 of the battery tab 11 partially into the groove 32 of the PCB 30, the welding area of ​​the battery tab 11 and the PCB 30 can be arranged to overlap in the battery length direction. This allows the thickness of the battery tab 11, the thickness of the first connecting part 21, and the thickness of the PCB 30 to be partially superimposed in space, thereby maximizing the compression of the total thickness of the connecting structure in the battery length direction. This extreme space utilization method allows the dimensions of the battery tab 11, the conductive component 20, and the PCB 30 to reach the theoretical minimum, thereby further increasing the capacity of the battery body 10 under strict battery size constraints.

[0205] Specifically, in the thickness direction of PCB 30, the depth of groove 32 is greater than or equal to the sum of the thicknesses of the first connecting portion 21 and the battery electrode tab 11. In this embodiment, in the thickness direction of PCB 30, the depth of groove 32 is greater than or equal to the sum of the thicknesses of the first connecting portion 21 and the second bending segment 113. It can be understood that by setting the depth of groove 32 to be at least equal to the sum of the thicknesses of the first connecting portion 21 and the first bending segment 112, it can be ensured that the first connecting portion 21 and the second bending segment 113 can be completely accommodated within groove 32, so that the surface of the second bending segment 113 is not higher than the PCB 30 board surface where groove 32 is located.

[0206] The beneficial effects of the cell connection structure 100 and the battery provided in this application embodiment include:

[0207] The cell connection structure 100 of this application uses a U-shaped conductive element 20 formed by a first connecting portion 21, a second connecting portion 22, and a third connecting portion 23 to wrap around the PCB 30 in the thickness direction. This ensures that the conductive element 20 occupies only the space along the length of the battery due to the single thickness of the first connecting portion 21. This design optimizes the space occupied by the traditional L-shaped conductive element 20 after bending (which requires twice the thickness of the conductive element 20 body plus the bending radius) to only the material thickness of the first connecting portion 21, thereby minimizing the space occupied in the length direction of the battery. The freed-up space can be directly used to increase the cell volume and improve the battery energy density.

[0208] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A battery protection board, comprising: A printed circuit board, wherein a protection circuit is provided on the printed circuit board; A flexible circuit board, comprising an integrally formed board body and a conductive portion, wherein the board body is electrically connected to the printed circuit board, the conductive portion is located on one side of the board body in the width direction, and the projection of the printed circuit board onto the board body does not coincide with the conductive portion.

2. The battery protection board according to claim 1, wherein, The printed circuit board has a thickness direction, and the printed circuit board includes a first surface and a second surface that are opposite to each other in the thickness direction; The plate body includes a third surface and a fourth surface that are opposite to each other in the thickness direction; The battery protection board also includes a conductive layer sandwiched between the first surface and the third surface, and the conductive layer electrically connects the board body and the printed circuit board.

3. The battery protection plate of claim 2, wherein, The board body has a portion extending beyond the printed circuit board on one side in the width direction, and the conductive portion is disposed on the extended portion.

4. The battery protection plate of claim 3, wherein, The extended portion extends at a predetermined angle to the third or fourth surface of the plate body, and the extended portion extends beyond the third or fourth surface in the thickness direction.

5. The battery protection plate of claim 4, wherein, The conductive portion extends from the third surface at the preset angle for a length of 2.0 mm to 20 mm.

6. The battery protection plate of claim 2, wherein, The battery protection board also includes a plurality of components forming the protection circuit, and the plurality of components are disposed on the second surface.

7. The battery protection plate of claim 6, wherein, The battery protection board further includes a first package, which covers the second surface; And / or, the portion of the first package that covers the conductive portion, and the portion of the conductive portion that is not covered by the first package that is used for electrical connection of the tab.

8. The battery protection plate of claim 1, wherein, The number of conductive parts is multiple, and the multiple conductive parts are spaced apart along the length direction of the plate body.

9. A battery, said battery comprising a battery protection board as claimed in any one of claims 1 to 8; The battery cell has tabs that are electrically connected to the conductive part of the battery protection board.

10. The battery of claim 9, wherein, The battery also includes a second package that covers the head of the cell and the outside of the battery protection plate.

11. A battery, comprising: Battery protection board (2), the battery protection board (2) has a top surface (22) on which components (4) are arranged along its thickness direction; The battery cell (3) includes a tab (31) located on one side of the battery protection plate (2) in its width direction; The connector (1) includes a first connecting part (11) and a second connecting part (12) connected to each other; the first connecting part (11) is located between the battery protection board (2) and the electrode (31), and the first connecting part (11) is welded to the electrode (31); the second connecting part (12) has a welding surface (122), the area of ​​which is greater than or equal to 2 mm. 2 The welding surface (122) is welded to the top surface (22).

12. The battery of claim 11, wherein, The length of the second connecting part (12) is greater than or equal to 2 mm, and the width of the second connecting part (12) is greater than or equal to 1 mm.

13. The battery of claim 11, wherein, The battery cell (3) includes a battery cell body (32) connected to the electrode (31); The tab (31) protrudes from one end of the battery cell body (32); The battery protection board (2) is disposed between the second connecting part (12) and the battery cell body (32).

14. The battery of claim 11, wherein, Along the width direction of the battery protection plate (2), the orthographic projection of the second connecting part (12) falls within the orthographic projection of the first connecting part (11).

15. The battery of claim 14, wherein, Along the length direction of the battery protection plate (2), the extension length of the first connecting part (11) is greater than the extension length of the second connecting part (12).

16. The battery of claim 14, wherein, The first connecting part (11) includes a first sub-connecting part (111) and a second sub-connecting part (112) that are connected to each other; Along the thickness direction of the battery protection plate (2), the first sub-connection part (111) is located on one side of the second connection part (12), and the second sub-connection part (112) is located on the other side of the second connection part (12); The first sub-connecting part (111) and / or the second sub-connecting part (112) are connected to the tab (31).

17. The battery of claim 16, wherein, Along the width direction of the battery protection plate (2), the thickness of the second sub-connection portion (112) is greater than the thickness of the first sub-connection portion (111).

18. The battery of claim 17, wherein, The second sub-connecting portion (112) includes a reinforcing portion (1121), and the thickness of the reinforcing portion (1121) is greater than the thickness of the first sub-connecting portion (111) along the width direction of the battery protection plate (2). The second connecting portion (12) has a first surface (121) on the side facing the reinforcing portion (1121), and the reinforcing portion (1121) has a second surface (1122) on the side facing the second connecting portion (12). The second surface (1122) is set at an angle to the first surface (121), and the angle is greater than or equal to 90°.

19. The battery of claim 18, wherein, Along the length of the battery protection plate (2), the length of the reinforcing part (1121) is equal to or less than the length of the second connecting part (12).

20. The battery of claim 11, wherein, The connection between the second connecting part (12) and the first connecting part (11) is a rounded chamfer (14), and the radius of the rounded chamfer (14) is less than or equal to 0.5 mm.

21. An electronic device comprising the battery according to any one of claims 11-20.

22. A battery protection board, comprising a protection board body and a first electronic device; The body of the first electronic device is at least partially embedded within the main body of the protective plate; The protection plate body is placed vertically at the head of the battery cell. The protection plate body includes an assembly sidewall extending along the length of the battery cell. The assembly sidewall is provided with a conductive part for electrical connection with the electrode tab of the battery cell.

23. The battery protection plate of claim 22, wherein, The battery protection board also includes a second electronic component; The protection board body is encapsulated in the head of the battery cell by an encapsulation structure. One end of the protection board body has an extension circuit board that extends out of the encapsulation structure, and the second electronic device is disposed on the extension circuit board.

24. The battery protection plate of claim 22, wherein, The surface of the protection board body facing the battery cell is the first surface; The conductive portion extends toward one side of the battery cell to form a first extension portion, and the first extension portion is bent to be in contact with the first surface; The electrode tab includes an assembly part and a first electrode tab part. The assembly part is attached to and welded to the conductive part. The first electrode tab part is connected to the assembly part in an L-shape. The first electrode tab part is attached to and welded to the first extension part.

25. The battery protection plate of claim 24, wherein, A first clearance groove is formed at the position of the first surface opposite to the first extension to accommodate the first extension.

26. The battery protection plate of claim 22, wherein, The surface of the protection board body facing away from the battery cell is the second surface; The conductive portion extends to the side away from the battery cell to form a second extension, which is bent to be in contact with the second surface. The electrode includes an assembly part and a second electrode part. The assembly part is attached to and welded to the conductive part. The second electrode part is connected to the assembly part in an L-shape. The second electrode part is attached to and welded to the second extension part.

27. The battery protection plate of claim 26, wherein, A second clearance groove is formed at the position of the second surface opposite to the second extension to accommodate the second extension.

28. The battery protection plate of claim 23, wherein, The number of the second electronic devices is multiple, and the multiple second electronic devices are respectively mounted on the extension circuit board and encapsulated on the extension circuit board by an adhesive layer or a plastic encapsulation layer.

29. The battery protection plate of claim 23, wherein, The number of the second electronic devices is multiple, and the multiple second electronic devices are mounted and encapsulated on a carrier board to form a module, which is mounted on the extension circuit board.

30. A battery comprising a battery protection board according to any one of claims 22 to 29.

31. An electronic device comprising the battery of claim 30.

32. A cell connection structure (100), comprising: PCB(30); The conductive component (20) includes a first connecting part (21), a second connecting part (22) and a third connecting part (23) connected in sequence. The second connecting part (22) is disposed at one end of the PCB (30) in the width direction. The first connecting part (21) and the third connecting part (23) are bent toward the two sides of the PCB (30) in the thickness direction and attached to the PCB (30). The battery electrode tab (11) is connected to the side of the first connection part (21), the second connection part (22), or the third connection part (23) away from the PCB (30).

33. The electric cell connection structure (100) according to claim 32, wherein The PCB (30) has a groove (32) on its side in the thickness direction so that the portion of the first connecting part (21) attached to the PCB (30) in the thickness direction is accommodated in the groove (32).

34. The electric cell connection structure (100) according to claim 33, wherein In the thickness direction of the PCB (30), the depth of the groove (32) is greater than or equal to the thickness of the first connecting part (21).

35. The electric cell connection structure (100) according to claim 33, wherein After the battery electrode tab (11) is connected to the conductive element (20), the battery electrode tab (11) is partially accommodated in the groove (32).

36. The electric cell connection structure (100) according to claim 35, wherein In the thickness direction of the PCB (30), the depth of the groove (32) is greater than or equal to the sum of the thicknesses of the first connecting part (21) and the battery cell tab (11).

37. The cell connection structure (100) according to any one of claims 32-36, wherein, The battery cell tab (11) includes a connecting section (111), a first bending section (112), and a second bending section (113) connected in sequence. The end of the connecting section (111) away from the first bending section (112) is connected to the battery cell body (10). The first bending section (112) bends toward the battery cell body (10) along a first direction. When the battery cell tab (11) is connected to the first connecting part (21), the second bending section (113) bends in a second direction opposite to the first direction and is welded and fixed to the first connecting part (21); When the battery cell tab (11) is connected to the second connecting part (22), the second bent section (113) bends along a third direction perpendicular to the first direction and is welded and fixed to the second connecting part (22); When the battery electrode tab (11) is connected to the third connecting part (23), the second bending segment (113) bends along the third direction, and the battery electrode tab (11) also includes a third bending segment (114) connected to the end of the second bending segment (113) away from the first bending segment (112), the third bending segment (114) bends along the second direction and is welded and fixed to the third connecting part (23).

38. The electric cell connection structure (100) according to claim 37, wherein The first bent section (112) is bonded to the battery cell body (10).

39. The electric cell connection structure (100) according to claim 33, wherein In the width direction of the PCB (30), the length of the first connecting part (21) is greater than the length of the third connecting part (23).

40. The electric cell connection structure (100) according to claim 32, wherein The first connecting part (21) is bonded to the PCB (30), and / or the third connecting part (23) is bonded to the PCB (30).

41. A battery comprising the cell connection structure (100) as described in any one of claims 32-40.

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