Printed circuit boards, battery protection boards and batteries

Abstract

This utility model provides a printed circuit board, a battery protection board, and a battery, relating to the field of battery technology. The printed circuit board includes a board body and a reinforcing member. The board body has a clearance groove that extends through the printed circuit board along its thickness direction. The reinforcing member is connected to the board body and extends along the edge of the clearance groove. Thus, by providing the reinforcing member, the structural strength of the board body at the edge of the clearance groove can be improved, thereby reducing the risk of printed circuit board deformation.

Description

Technical Field

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

[0002] With the widespread use of electronic devices, the demand for power in portable electronic products is increasing. Batteries, due to their small size, high energy density, and portability, have become the primary power source for these devices. A battery typically consists of a battery protection board and multiple battery cells. The battery protection board sits flat on top of the cells, spanning across them. All the cells are connected to the battery protection board, and then they are insulated and encapsulated to form the battery.

[0003] Notches can be created on the printed circuit board of a battery protection board, with the top seal of the battery cell located within the notch. This allows the space occupied by the battery protection board along the length of the cell to overlap with the space occupied by the top seal, thereby increasing the battery's capacity density. However, the strength at the notch on the printed circuit board is relatively low, increasing the risk of the printed circuit board deforming. Utility Model Content

[0004] In view of this, this application provides a printed circuit board, a battery protection board, and a battery to solve the problems of low strength at the notch of the printed circuit board and a high risk of deformation of the printed circuit board.

[0005] According to one aspect of this application, a printed circuit board is provided, the printed circuit board including a board body and a reinforcing member, the board body having an clearance groove that penetrates the printed circuit board along the thickness direction of the printed circuit board;

[0006] The reinforcing member is connected to the plate body and extends along the edge of the clearance groove.

[0007] Preferably, the clearance groove is recessed from one side of the board body in the width direction of the printed circuit board toward the interior of the board body;

[0008] The reinforcing member includes a connecting portion and two surrounding portions. The two surrounding portions are respectively connected to the connecting portion. Both the connecting portion and the two surrounding portions are connected to the board body. The two surrounding portions are respectively located on both sides of the clearance groove in the length direction of the printed circuit board.

[0009] Preferably, the dimension of the connecting portion in the width direction is greater than or equal to 1 mm.

[0010] Preferably, the dimension of the surrounding portion in the length direction is greater than or equal to 0.5 mm.

[0011] Preferably, the plate body includes a main body and an extension. The main body has the clearance groove. The extension protrudes from one side of the main body in the width direction. A portion of the connecting portion is located on the main body, and another portion of the connecting portion is located on the extension.

[0012] Preferably, the printed circuit board further includes a heat sink, which is connected to the board body, and the reinforcing member is connected to the heat sink.

[0013] Preferably, the plate body is provided with a plurality of clearance grooves, the plurality of clearance grooves are spaced apart along the length direction, and each clearance groove is provided with a corresponding reinforcing member.

[0014] According to a second aspect of this application, a battery protection board includes the aforementioned printed circuit board.

[0015] According to a third aspect of this application, a battery is provided, the battery comprising a plurality of cells and the aforementioned battery protection board, wherein the cells include a top sealing edge and a side sealing edge connected to each other, and the top sealing edge is bent;

[0016] Two adjacent side seals of the plurality of battery cells are located within the same clearance groove.

[0017] Preferably, the difference between the dimension of the clearance groove in the width direction of the printed circuit board and the dimension of the top sealing edge in the width direction is greater than 0.1 mm.

[0018] The printed circuit board of this application includes a board body and a reinforcing member. The board body has a clearance groove that extends through the printed circuit board along its thickness direction. The reinforcing member is connected to the board body and extends along the edge of the clearance groove. In this way, by providing the reinforcing member, the structural strength of the board body at the edge of the clearance groove can be improved, thereby reducing the risk of printed circuit board deformation. Attached Figure Description

[0019] 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.

[0020] Figure 1 A three-dimensional structural diagram of a printed circuit board is shown;

[0021] Figure 2 A three-dimensional structural diagram of the plate body is shown;

[0022] Figure 3 A schematic diagram of the planar structure of the reinforcing member is shown;

[0023] Figure 4 A three-dimensional structural diagram of the battery protection board is shown;

[0024] Figure 5 A three-dimensional structural diagram of the battery is shown;

[0025] Figure 6 Show Figure 5 Enlarged view of section A.

[0026] Icons: 1-Battery protection board; 11-Printed circuit board; 111-Board body; 1111-Main body; 1112-Extension; 112-Allowing groove; 113-Electronic components; 114-Reinforcing member; 1141-Connecting part; 1142-Enclosing part; 12-Flexible circuit board; 2-Battery cell; 21-Top sealing edge; 22-Side sealing edge; L1-Length direction; L2-Width direction; L3-Thickness direction. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The following will combine Figures 1 to 6 The printed circuit board 11, battery protection board 1, and battery provided in this application are described below. Figures 1 to 6 In the circuit, the length direction L1 of the printed circuit board 11 is parallel to the width direction of the battery cell 2, the width direction L2 of the printed circuit board 11 is parallel to the thickness direction of the battery cell 2, the thickness direction L3 of the printed circuit board 11 is parallel to the length direction of the battery cell, and the length direction L1, width direction L2 and thickness direction L3 of the printed circuit board 11 are perpendicular to each other.

[0037] According to a first aspect of this application, a printed circuit board 11 is provided, such as... Figure 1 As shown, the printed circuit board 11 includes a board body 111 and a reinforcing member 114. The board body 111 has a clearance groove 112 that extends through the printed circuit board 11 along its thickness direction L3. The reinforcing member 114 is connected to the board body 111 and extends along the edge of the clearance groove 112. Thus, by providing the reinforcing member 114, the structural strength of the board body 111 at the edge of the clearance groove 112 can be improved, thereby reducing the risk of deformation of the printed circuit board 11.

[0038] When the battery protection board 1, including the printed circuit board 11 of this application, is connected to the battery cell 2, such as Figure 5 and Figure 6As shown, the printed circuit board 11 is laid flat, and the two adjacent top seal edges 21 of the two adjacent cells 2 are attached together. The two top seal edges 21 extend from the clearance groove 112, which makes the space occupied by the printed circuit board 11 in the length direction of the cell 2 overlap with the space occupied by the top seal edges 21 in the length direction of the cell 2. The printed circuit board 11 no longer occupies additional space, and the space that the cell 2 can occupy within the limited space increases, thereby improving the energy density of the battery.

[0039] In the embodiments of this application, such as Figure 2 As shown, the clearance groove 112 is recessed from one side of the plate body 111 in the width direction L2 toward the interior of the plate body 111, which makes the clearance groove 112 open on one side in the width direction L2, so that the top sealing edge 21 of the battery cell 2 can be installed into the clearance groove 112 through the open.

[0040] like Figure 1 and Figure 3 As shown, the reinforcing member 114 includes a connecting portion 1141 and two surrounding portions 1142. Both the connecting portion 1141 and the surrounding portions 1142 are strip-shaped. The two surrounding portions 1142 are respectively connected to the connecting portion 1141, and the two surrounding portions 1142 are arranged at intervals along the length direction L1. The connecting portion 1141 and the two surrounding portions 1142 are both connected to the board body 111, and the two surrounding portions 1142 are respectively located on both sides of the clearance groove 112 in the length direction L1 of the printed circuit board 11. In this way, the clearance groove 112 has a structure that can reinforce the board body 111 on one side in the width direction L2 and on both sides in the length direction L1. The structural strength of the printed circuit board 11 near the clearance groove 112 is increased, thereby reducing the risk of deformation of the printed circuit board 11.

[0041] Furthermore, the surrounding portion 1142 extends from the connecting portion 1141 along the width direction L2, and the dimension of the surrounding portion 1142 in the length direction L1 is greater than or equal to 0.5mm. This ensures that the surrounding portion 1142 itself has sufficient strength to ensure that the portions of the plate body 111 located on both sides of the clearance groove 112 in the length direction L1 have sufficient strength.

[0042] Optionally, the size of the surrounding portion 1142 in the length direction L1 can be 0.5mm, 0.52mm, 0.55mm, etc.

[0043] like Figure 3As shown, the dimension of the connecting portion 1141 in the length direction L1 is larger than the dimension of the clearance groove 112 in the length direction L1. The left end of the connecting portion 1141 in the length direction L1 protrudes to the left relative to the surrounding portion 1142 located at the left end, and the right end of the connecting portion 1141 in the length direction L1 protrudes to the right relative to the surrounding portion 1142 located at the right end. The dimension of the middle portion of the connecting portion 1141 in the width direction L2 is larger than the dimensions of both ends of the connecting portion 1141 in the width direction L2. The dimension of the connecting portion 1141 in the width direction L2 is greater than or equal to 1 mm, which ensures that the connecting portion 1141 itself has sufficient strength to ensure that the portion of the plate body 111 located on the side of the clearance groove 112 in the width direction L2 has sufficient strength.

[0044] Optionally, the dimension of the connecting part 1141 in the width direction L2 can be 1mm, 1.01mm, 1.02mm, etc.

[0045] In addition, the printed circuit board 11 also includes a heat sink ( Figures 1 to 3 (Not shown in the image) The heat sink is attached to the plate body 111, and the reinforcing member 114 is connected to the heat sink. In this way, the heat generated by the plate body 111 can be dissipated through the heat sink and the reinforcing member 114.

[0046] Optionally, the heat sink can be a layered structure formed after copper plating on the surface of the board body 111.

[0047] Optionally, the reinforcing member 114 can be made of materials such as steel or copper. When installing the reinforcing member 114, nickel can be plated on the surface of the reinforcing member 114 and then welded to achieve the connection between the reinforcing member 114 and the heat sink.

[0048] like Figure 2 As shown, the board body 111 includes a main body 1111 and an extension 1112. The main body 1111 has a clearance groove 112, and the extension 1112 protrudes from one side of the main body 1111 along the width direction L2. A portion of the connecting portion 1141 is located on the main body 1111, and the other portion of the connecting portion 1141 is located on the extension 1112. That is, the extension 1112 is provided at the position where the clearance groove 112 is provided on the main body 1111, so that the dimension of the board body 111 corresponding to the position of the clearance groove 112 in the width direction L2 is relatively large. In this way, the position of the board body 111 corresponding to the clearance groove 112 can meet the requirements of the reinforcement 114, thereby ensuring the structural strength of the printed circuit board 11.

[0049] Optionally, the number of clearance slots 112 can be selected based on the number of battery cells 2 in the battery where the battery protection board 1 is located. When there are two battery cells 2, one clearance slot 112 is provided on the board body 111. When there are three or more battery cells 2, multiple clearance slots 112 are provided on the board body 111. The multiple clearance slots 112 are spaced apart along the length direction L1. A reinforcing member 114 is provided at the corresponding position of the clearance slot 112 on the board body 111. The difference between the number of battery cells 2 and the number of clearance slots 112 is equal to 1.

[0050] In addition, electronic devices 113 can be arranged on the side where the reinforcing member 114 of the plate body 111 is located, and a nickel sheet can be provided on the side of the plate body 111 facing away from the reinforcing member 114. The nickel sheet is used to connect with the electrode tab of the battery cell 2.

[0051] According to a second aspect of this application, a battery protection board 1 is provided, such as... Figure 4 As shown, the battery protection board 1 includes the printed circuit board 11 described above, which has the same technical effects as the battery protection board 1 described above, and will not be repeated here.

[0052] In addition, the battery protection board 1 also includes a flexible circuit board 12, which is connected to the printed circuit board 11.

[0053] According to a third aspect of this application, a battery is provided, such as... Figure 5 and Figure 6 As shown, the battery includes multiple cells 2 and the aforementioned battery protection board 1. Each cell 2 includes tabs, electrode groups, and an encapsulation film. The encapsulation film includes a connected encapsulation body, a top seal 21, and two side seals 22. The tabs are connected to the electrode groups, which are encapsulated within the encapsulation body. The top seal 21 is bent, and the tabs extend from within the top seal 21 and connect to the battery protection board 1. The thickness direction L3 of the printed circuit board 11 is parallel to the length direction of the cell 2. Two adjacent side seals 22 of two adjacent cells 2 are located within the same clearance groove 112. Thus, the space occupied by the printed circuit board 11 in the length direction of the cell 2 overlaps with the space occupied by the top seal 21 in the length direction of the cell 2. The printed circuit board 11 does not occupy additional space, increasing the space that the cell 2 can occupy within a limited space, thereby improving the battery's energy density.

[0054] Preferably, the difference between the dimension of the clearance groove 112 in the width direction L2 of the printed circuit board 11 and the dimension of the top sealing edge 21 in the width direction L2 is greater than 0.1 mm, so as to ensure that the top sealing edge 21 can be completely inserted into the mounting groove.

[0055] Optionally, after the battery cell 2 is connected to the battery protection board 1, injection molding or wrapping with insulating tape can be performed to complete the battery assembly.

[0056] Alternatively, the electronic device can be a mobile phone, tablet computer, etc.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A printed circuit board, characterized in that, The printed circuit board includes a board body and a reinforcing member. The board body has a clearance groove that penetrates the printed circuit board along its thickness direction. The reinforcing member is connected to the plate body and extends along the edge of the clearance groove.

2. The printed circuit board according to claim 1, characterized in that, The clearance groove is recessed from one side of the board body in the width direction of the printed circuit board toward the interior of the board body; The reinforcing member includes a connecting portion and two surrounding portions. The two surrounding portions are respectively connected to the connecting portion. Both the connecting portion and the two surrounding portions are connected to the board body. The two surrounding portions are respectively located on both sides of the clearance groove in the length direction of the printed circuit board.

3. The printed circuit board according to claim 2, characterized in that, The dimension of the connecting part in the width direction is greater than or equal to 1 mm.

4. The printed circuit board according to claim 2, characterized in that, The dimension of the surrounding portion in the length direction is greater than or equal to 0.5 mm.

5. The printed circuit board according to claim 2, characterized in that, The plate body includes a main body and an extension. The main body has the clearance groove. The extension protrudes from one side of the main body in the width direction. A portion of the connecting portion is located on the main body, and another portion of the connecting portion is located on the extension.

6. The printed circuit board according to claim 5, characterized in that, The printed circuit board also includes a heat sink, which is connected to the board body, and the reinforcing member is connected to the heat sink.

7. The printed circuit board according to any one of claims 2-6, characterized in that, The plate body has multiple clearance grooves, which are spaced apart along the length direction, and each clearance groove is provided with a corresponding reinforcing member.

8. A battery protection board, characterized in that, The battery protection board includes the printed circuit board according to any one of claims 1-7.

9. A battery, characterized in that, The battery includes a plurality of cells and the battery protection board as described in claim 8, wherein the cells include a top sealing edge and a side sealing edge connected to each other, and the top sealing edge is bent. Two adjacent side seals of the plurality of battery cells are located within the same clearance groove.

10. The battery according to claim 9, characterized in that, The difference between the dimension of the clearance groove in the width direction of the printed circuit board and the dimension of the top sealing edge in the width direction is greater than 0.1 mm.

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