Battery protection plate, battery and electronic device

Abstract

The application provides a battery protection plate, a battery and an electronic device, and relates to the technical field of batteries. According to the battery protection plate provided in the application, for the first flexible circuit board and the second flexible circuit board of the battery protection plate, a part of the plurality of conductive members is no longer arranged on the printed circuit board as in the prior art, but is arranged on the first flexible circuit board and / or the second flexible circuit board. In this way, the surface space of the printed circuit board occupied by the conductive members is reduced, and thus the device arrangement space on the printed circuit board is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery protection board, a battery, and an electronic device. Background Technology

[0002] In the relevant battery protection board structure, the PCB (Printed Circuit Board) assembly with multi-nickel sheet structure has all the nickel sheets mounted on the rigid board, which will occupy the space for component placement, affect the length of the rigid board, and affect the width space of the battery. Utility Model Content

[0003] In view of this, this application provides a battery protection board, a battery, and an electronic device, with the aim of solving the above-mentioned technical problems to a certain extent.

[0004] A first aspect of this application provides a battery protection board, the battery protection board comprising:

[0005] A printed circuit board having a length direction, the printed circuit board having a first side and a second side opposite to each other in the length direction;

[0006] A first flexible circuit board and a second flexible circuit board, wherein the first flexible circuit board is connected to the first side and the second flexible circuit board is connected to the second side;

[0007] A plurality of conductive components are provided, the conductive components being used for electrical connection with a battery cell, a portion of the conductive components being disposed on the first flexible circuit board and / or the second flexible circuit board, and another portion of the conductive components being disposed on the printed circuit board; wherein, all of the plurality of conductive components are electrically connected to the printed circuit board.

[0008] Based on the above technical solutions, optionally, the printed circuit board has a thickness direction perpendicular to the length direction, and the printed circuit board also has a first plate surface perpendicular to the thickness direction, the first plate surface having a connection area for connecting with the first flexible circuit board and the second flexible circuit board;

[0009] The conductive components disposed on the first flexible circuit board and / or the second flexible circuit board are located within the connection area.

[0010] Based on any of the above technical solutions, optionally, the connection area includes a first connection area located on the side where the first side is located and a second connection area located on the side where the second side is located, wherein the first connection area is used to connect with the first flexible circuit board and the second connection area is used to connect with the second flexible circuit board;

[0011] The first connection region and / or the second connection region are respectively provided with a plurality of the conductive components.

[0012] Optionally, based on any of the above technical solutions, some of the conductive components are disposed on the first flexible circuit board and the second flexible circuit board.

[0013] The printed circuit board has a first board surface perpendicular to the length direction, and the first board surface has a first connection area for connecting with the first flexible circuit board and a second connection area for connecting with the second flexible circuit board.

[0014] The conductive component disposed on the first flexible circuit board is located in the first connection area, and the conductive component disposed on the second flexible circuit board is located in the second connection area.

[0015] Based on any of the above technical solutions, optionally, at least one of the first connection region and the second connection region is provided with a plurality of the conductive components; or

[0016] Each of the first connection region and the second connection region is provided with a corresponding conductive component.

[0017] Based on any of the above technical solutions, optionally, the printed circuit board includes a first board surface and a second board surface that are opposite to each other, the printed circuit board has a thickness direction that is perpendicular to the length direction, the first board surface and the second board surface are both perpendicular to the thickness direction, and the other part of the conductive component is disposed on the first board surface;

[0018] The first board surface has a first connection area for connecting with the first flexible circuit board and a second connection area for connecting with the second flexible circuit board, and portions of the first flexible circuit board and the second flexible circuit board are both attached to the second board surface.

[0019] Optionally, based on any of the above technical solutions, the battery protection board further includes a first connector disposed on the first flexible circuit board and a second connector disposed on the second flexible circuit board, wherein the first connector and the second connector are used to electrically connect to external devices to charge and discharge the battery cell;

[0020] The printed circuit board also has a width direction, and the length direction, the width direction, and the thickness direction are perpendicular to each other. The first connector and the second connector both extend along the width direction to extend beyond the printed circuit board.

[0021] Optionally, based on any of the above technical solutions, the battery protection board further includes a protection circuit, which includes multiple devices disposed on the printed circuit board;

[0022] The conductive components disposed on the printed circuit board are located between the plurality of devices.

[0023] A second aspect of this application provides a battery that includes a battery protection board as described above.

[0024] A third aspect of this application provides an electronic device comprising the battery described above.

[0025] Thus, according to the battery protection board provided in this application, for the first flexible circuit board and the second flexible circuit board of the battery protection board, a portion of the aforementioned plurality of conductive components is no longer disposed on the printed circuit board as in the prior art, but is disposed on the first flexible circuit board and / or the second flexible circuit board. This reduces the surface space occupied by the conductive components on the printed circuit board, thereby reducing the space occupied by the components on the printed circuit board.

[0026] In other words, in the prior art, when all the aforementioned conductive components are located on a printed circuit board, the length of the printed circuit board must be increased to provide more space for device placement in order to ensure sufficient space for device arrangement. However, according to the battery protection board provided in this application, since some of the conductive components are transferred to the first flexible circuit board and / or the second flexible circuit board, the device placement space on the printed circuit board is saved. Therefore, there is no need to lengthen the printed circuit board, which helps to shorten the overall length of the printed circuit board and the battery protection board, making the battery protection board smaller in size, able to adapt to batteries with smaller widths, and facilitating the maximization of the overall space utilization of electronic devices using batteries.

[0027] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic plan view of a battery protection board provided according to an embodiment of this application is shown;

[0030] Figure 2 A schematic diagram of yet another plan view of a battery protection board provided according to an embodiment of this application is shown;

[0031] Figure 3 A schematic diagram of another plan view of a battery protection board provided according to an embodiment of this application is shown;

[0032] Figure 4 A schematic diagram showing a portion of the assembly process of the battery protection board and battery pack according to an embodiment of this application is provided;

[0033] Figure 5 This diagram illustrates another part of the assembly process of the battery protection board and battery pack according to an embodiment of this application.

[0034] Figure label:

[0035] 100 - Printed circuit board; 110 - First board surface; 111 - First connection area; 112 - Second connection area; 120 - Second board surface;

[0036] 210 - First flexible circuit board; 220 - Second flexible circuit board;

[0037] 300 - Conductive component;

[0038] 410 - First connector; 420 - Second connector; 500 - Device; Length direction - F1; Width direction - F2; Thickness direction - F3. Detailed Implementation

[0039] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0040] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0041] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0042] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0043] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0044] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0045] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0046] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0047] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0048] According to a first aspect of the embodiments of this application, a battery protection board is provided, which will be described below with reference to the accompanying drawings. Figures 1 to 5 Describe in detail the structure and working principle of the battery protection board.

[0049] According to the embodiments of this application, the battery protection board includes a printed circuit board 100, a first flexible circuit board 210, a second flexible circuit board 220, and a plurality of conductive components 300.

[0050] In this embodiment, the printed circuit board 100 has a length direction F1, and the printed circuit board 100 also has a first side and a second side opposite to each other in the length direction F1. The first flexible circuit board 210 is connected to the first side, and the second flexible circuit board 220 is connected to the second side.

[0051] In this embodiment, the conductive member 300 is used to electrically connect with the battery cell. A portion of the conductive members 300 are disposed on the first flexible circuit board 210 and / or the second flexible circuit board 220, and another portion of the conductive members 300 are disposed on the printed circuit board 100. All of the aforementioned conductive members 300 are electrically connected to the printed circuit board 100.

[0052] Thus, according to the battery protection board provided in the embodiments of this application, for the first flexible circuit board 210 and the second flexible circuit board 220 of the battery protection board, a portion of the aforementioned plurality of conductive members 300 are no longer disposed on the printed circuit board 100 as in the prior art, but are disposed on the first flexible circuit board 210 and / or the second flexible circuit board 220. This reduces the surface space occupied by the conductive members 300 on the printed circuit board 100, thereby reducing the space occupied by the devices 500 arranged on the printed circuit board 100.

[0053] In other words, in the prior art, when all the aforementioned conductive components are disposed on a printed circuit board, the length of the printed circuit board must be increased to provide more space for device placement in order to ensure that the printed circuit board has sufficient space for device placement. However, in the battery protection board provided according to the embodiments of this application, since a portion of the conductive components 300 are transferred to the first flexible circuit board 210 and / or the second flexible circuit board 220, the space for device placement on the printed circuit board 100 is saved. Therefore, there is no need to lengthen the printed circuit board 100, which helps to shorten the overall length of the printed circuit board 100 and the battery protection board, making the battery protection board smaller in size, able to adapt to batteries with smaller widths, and facilitating the maximization of the overall space of electronic devices using batteries.

[0054] In the embodiments, the printed circuit board 100 mentioned in the above description can be a PCB, and the flexible circuit board can be, for example, an FPC (Flexible Printed Circuit).

[0055] like Figure 1 and Figure 3 As shown, by way of example, the printed circuit board 100 may be, for example, a rectangular plate structure, or a generally rectangular plate structure. The printed circuit board 100 has, in addition to the length direction F1 as described above, a width direction F2 perpendicular to the length direction F1.

[0056] As mentioned above, the first flexible circuit board 210 and the second flexible circuit board 220 are respectively connected to the first and second sides of the printed circuit board 100 along the length direction F1. For example, both the first flexible circuit board 210 and the second flexible circuit board 220 can be soldered to the corresponding pre-set pads on the printed circuit board 100 via solder pads. Both the first flexible circuit board 210 and the second flexible circuit board 220 can have a certain overlap area with the printed circuit board 100 along the length direction F1, which will be explained in detail in the following description.

[0057] In one embodiment, only a portion of the conductive components 300 may be disposed on the first flexible circuit board 210, while the remaining portion may be disposed on the printed circuit board 100. Alternatively, only a portion of the conductive components 300 may be disposed on the second flexible circuit board 220, while the remaining portion may be disposed on the printed circuit board 100. Or, some conductive components 300 may be disposed on the first flexible circuit board 210, some on the second flexible circuit board 220, and the remaining conductive components 300 may be disposed on the printed circuit board 100.

[0058] In an embodiment, such as Figure 1 and Figure 2 As shown in the accompanying drawings of this application, the example provided is the third example mentioned in the above description, namely, an example in which the first flexible circuit board 210, the second flexible circuit board 220 and the printed circuit board 100 are all provided with conductive members 300. This example is beneficial to make full use of the space provided by the first flexible circuit board 210 and the second flexible circuit board 220 for arranging conductive members 300.

[0059] In an embodiment, the conductive member 300 may be, for example, a bent sheet-like structure. Figure 1 and Figure 2 ,in, Figure 1 The viewing angle is obtained by observing along the thickness direction F3 of the printed circuit board 100. Figure 2 It is the viewing angle obtained by observing along the width direction F2 of the printed circuit board 100.

[0060] In an embodiment, the conductive member 300 may have two parts that are bent perpendicular to each other, one part of which is connected to the circuit board (such as the printed circuit board 100 or flexible circuit board mentioned above) on which the conductive member 300 is located. As an example, the conductive member 300 may be, for example, a nickel sheet, and the conductive member 300 may be soldered to the corresponding circuit board.

[0061] According to the battery protection board provided in the embodiments of this application, the printed circuit board 100 also has a first surface 110 perpendicular to the thickness direction F3 (i.e., one of the two surfaces of the printed circuit board 100 with the largest area). Figure 1 The first plate surface 110 shown in the figure has a connection area for connecting with the first flexible circuit board 210 and the second flexible circuit board 220, which is the overlapping area mentioned in the above description.

[0062] In the embodiment, the conductive member 300 disposed on the first flexible circuit board 210 and / or the second flexible circuit board 220 is located within the connection area. Thus, the battery protection board provided according to the embodiment of this application is equivalent to reusing the overlapping portions of the printed circuit board 100 as a rigid board and the first flexible circuit board 210 and the second flexible circuit board 220 as flexible boards.

[0063] In an embodiment, the battery protection board provided according to the present application embodiment may include a first connection area 111 located on the side where the first side is located and a second connection area 112 located on the side where the second side is located. The first connection area 111 may be used to connect with the first flexible circuit board 210, and the second connection area 112 may be used to connect with the second flexible circuit board 220.

[0064] Based on the above configuration, a plurality of conductive components 300 may be provided in the first connection region 111 and / or the second connection region 112. In an embodiment, both the first connection region 111 and the second connection region 112 may serve as solder pad areas for soldering to the printed circuit board 100. In the two overlapping regions formed by the printed circuit board 100, the first flexible circuit board 210, and the second flexible circuit board 220, more conductive components 300 may be provided, such as two or three, to fully utilize these areas.

[0065] In other examples, such as Figure 1 and Figure 2 As shown, a conductive component 300 can be provided in each connection area.

[0066] In the embodiments, it should be noted that the conductive member 300 disposed on the printed circuit board 100 can be electrically connected to the circuit formed by the device 500 on the printed circuit board 100 through the conductive pattern on the printed circuit board 100, while the conductive member 300 disposed on the first flexible circuit board 210 and / or the second flexible circuit board 220 can be electrically connected to the circuit formed by the device 500 on the printed circuit board 100 through the flexible circuit board where the conductive member 300 is located.

[0067] According to the battery protection board provided in the embodiments of this application, the printed circuit board 100 may include a second surface 120 opposite to the first surface 110 as described above, and portions of the first flexible circuit board 210 and the second flexible circuit board 220 are both attached to the second surface 120. Here, the first flexible circuit board 210 and the second flexible circuit board 220 can be bent to the second surface 120 of the printed circuit board 100. Since the length of the printed circuit board 100 is saved, the bent first flexible circuit board 210 and the second flexible circuit board 220 can also provide more space.

[0068] According to the battery protection board provided in the embodiments of this application, the battery protection board may further include a first connector 410 disposed on a first flexible circuit board 210 and a second connector 420 disposed on a second flexible circuit board 220. The first connector 410 and the second connector 420 are used to electrically connect to external devices to charge and discharge the battery cells.

[0069] In this embodiment, both the first connector 410 and the second connector 420 extend along the width direction F2 beyond the printed circuit board 100 to establish an electrical connection with the outside.

[0070] According to the battery protection board provided in the embodiments of this application, the battery protection board may further include a protection circuit, which includes a plurality of devices 500 disposed on the printed circuit board 100 as described above. In the embodiments, the conductive members 300 disposed on the printed circuit board 100 are located between the plurality of devices 500, thereby arranging the devices 500 between the gaps between the conductive members 300, which also helps to avoid the concentration of heat in the battery protection board.

[0071] According to the second aspect of the embodiments of this application, the battery includes the battery protection board as described above, and may also include a battery body electrically connected to the battery protection board via a conductive member 300. The battery body may be, for example, a pouch battery.

[0072] The following combination Figure 4 and Figure 5 Describe the process of assembling the battery protection board onto the battery body. Specifically, such as... Figure 4 As shown, first attach the tail, sides, and double-sided adhesive (corresponding to) to the battery body, that is, the battery pack. Figure 4 First, attach the tail / side / double-sided adhesive tape, then install the battery protection board, and weld the battery pack tabs to the conductive components (corresponding to...). Figure 4 (In the process of mounting and welding the plates), the conductive components are then folded to change the orientation of the battery protection board, transforming it from horizontal to vertical (corresponding to...). Figure 4 (The nickel sheet in the middle).

[0073] Based on the above process, such as Figure 5 As shown, the battery protection board is then folded. First, the two flexible circuit boards are pre-folded, for example, by pre-creating creases at the locations where bending is required. Then, the battery pack is subjected to low-pressure injection molding at the head. Finally, the two flexible circuit boards are folded to the positions described above.

[0074] According to a third aspect of the embodiments of this application, an electronic device is provided, the electronic device including the battery as described above, and the electronic device may be, for example, a mobile phone or a laptop computer.

[0075] Finally, it should be noted that the above embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A battery protection board, characterized in that, The battery protection board includes: A printed circuit board having a length direction, the printed circuit board having a first side and a second side opposite to each other in the length direction; A first flexible circuit board and a second flexible circuit board, wherein the first flexible circuit board is connected to the first side and the second flexible circuit board is connected to the second side; A plurality of conductive components are provided, the conductive components being used for electrical connection with a battery cell, a portion of the conductive components being disposed on the first flexible circuit board and / or the second flexible circuit board, and another portion of the conductive components being disposed on the printed circuit board; wherein, all of the plurality of conductive components are electrically connected to the printed circuit board.

2. The battery protection board according to claim 1, characterized in that, The printed circuit board has a thickness direction perpendicular to the length direction, and the printed circuit board also has a first plate surface perpendicular to the thickness direction, the first plate surface having a connection area for connecting with the first flexible circuit board and the second flexible circuit board; The conductive components disposed on the first flexible circuit board and / or the second flexible circuit board are located within the connection area.

3. The battery protection board according to claim 2, characterized in that, The connection area includes a first connection area located on the side where the first side is located and a second connection area located on the side where the second side is located. The first connection area is used to connect with the first flexible circuit board, and the second connection area is used to connect with the second flexible circuit board. The first connection region and / or the second connection region are respectively provided with a plurality of the conductive components.

4. The battery protection board according to claim 1, characterized in that, Some of the conductive components are disposed on the first flexible circuit board and the second flexible circuit board; The printed circuit board has a first board surface perpendicular to the length direction, and the first board surface has a first connection area for connecting with the first flexible circuit board and a second connection area for connecting with the second flexible circuit board. The conductive component disposed on the first flexible circuit board is located in the first connection area, and the conductive component disposed on the second flexible circuit board is located in the second connection area.

5. The battery protection board according to claim 4, characterized in that, At least one of the first connection region and the second connection region is provided with a plurality of the conductive components; or Each of the first connection region and the second connection region is provided with a corresponding conductive component.

6. The battery protection board according to claim 1, characterized in that, The printed circuit board includes a first board surface and a second board surface that are opposite to each other. The printed circuit board has a thickness direction that is perpendicular to the length direction. Both the first board surface and the second board surface are perpendicular to the thickness direction. The other part of the conductive component is disposed on the first board surface. The first board surface has a first connection area for connecting with the first flexible circuit board and a second connection area for connecting with the second flexible circuit board, and portions of the first flexible circuit board and the second flexible circuit board are both attached to the second board surface.

7. The battery protection board according to claim 6, characterized in that, The battery protection board further includes a first connector disposed on the first flexible circuit board and a second connector disposed on the second flexible circuit board. The first connector and the second connector are used to electrically connect to external devices to charge and discharge the battery cell. The printed circuit board also has a width direction, and the length direction, the width direction, and the thickness direction are perpendicular to each other. The first connector and the second connector both extend along the width direction to extend beyond the printed circuit board.

8. The battery protection board according to claim 1, characterized in that, The battery protection board also includes a protection circuit, which includes multiple devices disposed on the printed circuit board; The conductive components disposed on the printed circuit board are located between the plurality of devices.

9. A battery, characterized in that, The battery includes a battery protection board as described in any one of claims 1 to 8.

10. An electronic device, characterized in that, The electronic device includes the battery as described in claim 9.

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