Battery protection board and battery

Abstract

The utility model provides a battery protection plate and a battery, and relates to the technical field of batteries. The battery protection board comprises a printed circuit board, a connecting mechanism and a plurality of components, the connecting mechanism comprises a first connecting piece and a second connecting piece, and the first connecting piece is connected with the printed circuit board through the second connecting piece. The first connecting pieces and the printed circuit board are arranged at intervals along the thickness direction of the printed circuit board, an accommodating space is defined by the first connecting pieces and the printed circuit board, and at least one component is located in the accommodating space. Therefore, the at least one component is overlapped with the first connecting piece, and the piece distribution space on the printed circuit board is increased, so that the piece distribution space of the printed circuit board can meet the piece distribution requirement of the component when facing a higher through-flow requirement, and the miniaturization requirement of the battery protection board is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery protection plate and a battery. BACKGROUND

[0002] The battery protection plate (Protection Circuit Module, referred to as PCM) is an important component for protecting the battery from overcharging, overdischarging, and short circuit, etc. The battery protection plate includes a printed circuit board (Printed Circuit Board, referred to as PCB), and the surface of the printed circuit board is provided with components and a nickel sheet, and the pole lug of the soft package battery cell is welded on the nickel sheet.

[0003] However, the nickel sheet will occupy the space on the printed circuit board, and the components can only be arranged in other areas on the printed circuit board. When facing higher current flow requirements, a wider or thicker printed circuit board is needed to arrange the required components, which is not conducive to the miniaturization of the battery protection plate. CONTENT OF THE INVENTION

[0004] Therefore, the present application provides a battery protection plate and a battery to solve the problem that when facing higher current flow requirements, a wider or thicker printed circuit board is needed to arrange the required components, which is not conducive to the miniaturization of the battery protection plate.

[0005] According to an aspect of the present application, a battery protection plate is provided, which includes a printed circuit board, a connecting mechanism, and a plurality of components, the connecting mechanism includes a first connecting piece and a second connecting piece, the first connecting piece is connected with the printed circuit board through the second connecting piece, the first connecting piece and the printed circuit board are arranged along the thickness direction of the printed circuit board, the first connecting piece and the printed circuit board enclose a receiving space, and at least one of the components is located in the receiving space.

[0006] Preferably, the second connecting piece includes a connecting portion and an extension portion, the first end of the extension portion is connected with the first connecting piece, the second end of the extension portion is inclined towards the outside of the receiving space, and the second end of the extension portion is connected with the connecting portion, and the connecting portion is connected with the printed circuit board.

[0007] Preferably, the number of the second connecting pieces is greater than or equal to two, and at least two of the second connecting pieces are located on different sides of the first connecting piece in the length direction and / or the width direction of the printed circuit board.

[0008] Preferably, the battery protection plate comprises a plastic package, a part of the component located in the accommodating space is covered by the plastic package, a part of the connecting mechanism is covered by the plastic package, and a surface of the second connecting member facing away from the accommodating space is exposed outside the plastic package.

[0009] Preferably, an end of the second connecting member away from the first connecting member extends out of the plastic package, and a surface of the component located in the accommodating space and facing away from the first connecting member is exposed outside the plastic package.

[0010] Preferably, the battery protection plate comprises at least two connecting mechanisms, and the at least two connecting mechanisms are arranged in a spaced manner.

[0011] Preferably, the number of the plastic packages is equal to the number of the connecting mechanisms, the plastic packages correspond to the connecting mechanisms one by one, a part of the connecting mechanism is covered by the plastic package corresponding to the connecting mechanism, and a part of the component located in the accommodating space surrounded by the connecting mechanism and the printed circuit board is covered by the plastic package corresponding to the connecting mechanism.

[0012] Preferably, the size of the plastic package in the length direction of the printed circuit board is greater than the size of the connecting mechanism in the length direction, and the size of the plastic package in the width direction of the printed circuit board is greater than the size of the connecting mechanism in the width direction.

[0013] Preferably, the number of the plastic packages is less than the number of the connecting mechanisms, and each plastic package covers at least one connecting mechanism.

[0014] According to another aspect of the present application, a battery is provided, which comprises a battery protection plate as described above and a battery cell, and the battery cell is connected to the connecting mechanism.

[0015] In the battery protection plate of the present application, the battery protection plate comprises a printed circuit board, a connecting mechanism and a plurality of components, the connecting mechanism comprises a first connecting member and a second connecting member, the first connecting member is connected to the printed circuit board through the second connecting member, the first connecting member is arranged in a spaced manner with the printed circuit board, the first connecting member and the printed circuit board surround an accommodating space, and at least one component is located in the accommodating space. In this way, at least one component is stacked with the first connecting member, the layout space on the printed circuit board is increased, the layout space on the printed circuit board can meet the layout requirement of the component when facing higher current flow requirement, thereby meeting the miniaturization requirement of the battery protection plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 A structural schematic diagram of a battery protection plate is shown.

[0018] Figure 2 A partial structural schematic diagram of the battery protection plate is shown.

[0019] Figure 3 An enlarged view of part A is shown. Figure 2

[0020] Figure 4 A perspective structural diagram of a packaging structure made of a plastic sealing piece, a connecting mechanism and components is shown from one angle.

[0021] Figure 5 A perspective structural diagram of a packaging structure made of a plastic sealing piece, a connecting mechanism and components is shown from another angle.

[0022] Figure 6 A structural schematic diagram of a battery is shown.

[0023] Figure 7 An enlarged view of part B is shown. Figure 6

[0024] Figure legend: 100 - printed circuit board; 110 - groove; 200 - connecting mechanism; 210 - first connecting piece; 220 - second connecting piece; 221 - connecting part; 222 - extension part; 300 - component; 400 - plastic sealing piece; 500 - battery core; 510 - tab; 600 - accommodating space; L1 - length direction; L2 - width direction; L3 - thickness direction. DETAILED DESCRIPTION

[0025] The following detailed description is provided to help the reader obtain a complete understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents can be apparent to those skilled in the art after understanding the disclosure of the present application. For example, the order of the operations described herein is merely an example, and is not limited to the order set forth herein, and changes can be made that will be apparent to those skilled in the art after understanding the disclosure of the present application, except for the operations that must occur in a specific order. In addition, the description of features known in the art can be omitted in order to improve clarity and brevity.

[0026] ​​The features described can be implemented in different ways, and are not to be interpreted as being limited to the examples described herein. Rather, the examples are provided as a description of embodiments that, as of this time and based at least in part on the disclosure herein, represent the best understanding of various working options for implementing the methods, apparatus, and / or systems described herein.

[0027] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element, or "covering" another element, it can be directly on, connected to, coupled to, adjacent to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", "directly coupled to", "directly adjacent to", "directly on top of", or "directly covering" another element, there are no other elements interposed therebetween.

[0028] As used herein, the term "and / or" includes any one of the listed items and any combination of any two or more of the listed items.

[0029] Although terms such as "first", "second", and "third" can be used herein to describe various members, components, regions, layers or sections, these members, components, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer or section from another member, component, region, layer or section. Thus, a member, component, region, layer or section referred to as a first member, component, region, layer or section in one example described herein can also be referred to as a second member, component, region, layer or section in another example described herein without departing from the teachings of the examples.

[0030] For ease of description, spatial relationship terms, such as "on", "upper", "below", and "lower", can be used herein to describe the relationship between one element and another element as shown in the drawings. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, the element described as being on "top" or the "upper" of another element would then be oriented "below" or "lower" relative to the other element. Accordingly, the term "on" encompasses both an "on" and "under" orientation in terms of the spatial relationship between two elements. The device can also be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and the spatial relationship terms used herein are interpreted accordingly.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The following will combine Figures 1 to 7 The battery protection board and battery are described. Figures 1 to 7 In the circuit, the length direction L1 and the width direction L2 of the printed circuit board 100 intersect, and the thickness direction L3 of the printed circuit board 100 intersects the plane determined by the length direction L1 and the width direction L2 of the printed circuit board 100. The intersection can preferably be perpendicular. The following will be explained with the example that the length direction L1, the width direction L2 and the thickness direction L3 of the printed circuit board 100 are perpendicular to each other.

[0035] According to one aspect of this application, a battery protection board is provided, such as... Figures 1 to 5 As shown, the battery protection board includes a printed circuit board 100, a connecting mechanism 200, and multiple components 300. The connecting mechanism 200 includes a first connector 210 and a second connector 220. The first connector 210 is connected to the printed circuit board 100 through the second connector 220. The first connector 210 and the printed circuit board 100 are arranged at intervals along the thickness direction L3 of the printed circuit board 100, so that the first connector 210 and the printed circuit board 100 enclose a receiving space 600, and at least one component 300 is located within the receiving space 600. In this way, at least one component 300 is stacked with the first connector 210, increasing the placement space on the printed circuit board 100. When facing higher current requirements, the placement space of the printed circuit board 100 can meet the placement requirements of the components 300, thereby meeting the miniaturization requirements of the battery protection board.

[0036] Optionally, the number of components 300 located within the accommodating space 600 can be one, two, three, or more, and the specific number of components 300 located within the accommodating space 600 can be selected based on the volume of the accommodating space 600 and the volume of the components 300.

[0037] In the embodiments of this application, the first connector 210 is sheet-shaped, and the side of the first connector 210 facing away from the receiving space 600 is used to connect to the tab 510 of the battery cell 500. At least one component 300 is disposed within the receiving space 600 enclosed by the first connector 210 and the printed circuit board 100. The space occupied by the first connector 210 on the printed circuit board 100 overlaps with the space occupied by the component 300 located in the receiving space 600 on the printed circuit board 100, which allows the printed circuit board 100 to accommodate more components 300.

[0038] In addition, the first connector 210 and the printed circuit board 100 are arranged at intervals along the thickness direction L3, which can prevent the molten pool from burning through the printed circuit board 100 when the second connector 220 and the tab 510 are soldered.

[0039] Preferably, the first connector 210 and the plurality of second connectors 220 are integrally formed, and the connecting mechanism 200 may be made of nickel.

[0040] Optionally, the number of second connectors 220 can be two, three, four, or more. When there are two second connectors 220, the two second connectors 220 can be located on different sides of the first connector 210 in the length direction L1, or on different sides of the first connector 210 in the width direction L2, or on different sides of the first connector 210 in the width direction L2, and also on different sides of the first connector 210 in the length direction L1; in the second connector When there are three second connectors 220, two of them are located on the same side of the first connector 210 in the length direction L1, and the other second connector is located on the other side of the first connector 210 in the length direction L1; or two of them are located on the same side of the first connector 210 in the width direction L2, and the other second connector 220 is located on the other side of the first connector 210 in the width direction L2. When there are four second connectors 220, the four second connectors 220 can be arranged at the four corners of the first connector 210 respectively.

[0041] Optionally, when the number of second connectors 220 is greater than or equal to three, at least two second connectors 220 are located on the same side of the first connector 210, and at least one component 300 can be disposed between two adjacent second connectors 220 located on the same side. Thus, the space between two adjacent second connectors 220 located on the same side can also be used to arrange components 300, further increasing the component placement space on the printed circuit board 100.

[0042] Preferably, such as Figure 2 and Figure 3 As shown, there are four second connectors 220. The four second connectors 220 are respectively arranged at the four corners of the first connector 210. The space between any two adjacent second connectors 220 can be used to place components 300.

[0043] In the embodiments of this application, such as Figure 3 As shown, the second connector 220 includes a connecting portion 221 and an extension portion 222. The first end of the extension portion 222 is connected to the first connector 210, and the second end of the extension portion 222 is inclined outwards towards the receiving space 600. The second end of the extension portion 222 is connected to the connecting portion 221, which is connected to the printed circuit board 100. Thus, by tilting the second connector 220 outwards towards the receiving space, interference between the second connector 220 and the components 300 within the receiving space 600 can be avoided.

[0044] Optionally, the printed circuit board 100 has grooves 110, the number of which is the same as the number of second connecting parts 221, and the grooves 110 and the second connecting parts 221 correspond one-to-one. The bottom of the groove 110 may be provided with a pad, and a part of the connecting part 221 extends into the corresponding groove 110 and connects with the pad in the groove 110, thereby realizing the connection between the second connecting part 220 and the printed circuit board 100.

[0045] In the embodiments of this application, such as Figure 1 , Figure 4 and Figure 5 As shown, the battery protection board includes a molding compound 400. A portion of the component 300 located within the receiving space 600 is encapsulated by the molding compound 400, and a portion of the connecting mechanism 200 is also encapsulated by the molding compound 400, so that the molding compound 400 can protect both the component 300 and the connecting mechanism 200. The surface of the first connector 210 facing away from the receiving space 600 is exposed outside the molding compound 400. When the battery protection board is connected to the battery cell 500, as... Figure 6 and Figure 7 As shown, the surface of the second connector 220 facing away from the receiving space 600 is used for connecting the tab 510 of the cell 500.

[0046] Furthermore, the end of the connecting portion 221 away from the first connector 210 extends from within the encapsulation 400, and the surface of the component 300 located within the receiving space 600 facing away from the first connector 210 is exposed outside the encapsulation 400. During the manufacturing process of the battery protection board, the connecting mechanism 200 and the component 300 can be encapsulated first to form an encapsulation 400 covering the connecting mechanism 200 and the component 300. Then, the encapsulation structure consisting of the encapsulation 400, the connecting mechanism 200, and the component 300 is surface-mounted onto the printed circuit board 100. Since a portion of the connecting portion 221 is located outside the encapsulation 400, and the surface of the component 300 facing away from the second connector 220 is exposed outside the encapsulation 400, it facilitates the mounting of the connecting portion 221 and the component 300 to the printed circuit board 100. Furthermore, the encapsulation structure made of the molding compound 400, the connecting mechanism 200, and the component 300 allows for the installation of the connecting mechanism 200 and the component 300 in a single patch, thus improving the efficiency of battery protection board manufacturing.

[0047] Optionally, the first connector 210 may be partially or completely exposed outside the molding compound 400.

[0048] Preferably, the end of the extension 222 in the second connector 220 and the first connector 210 are exposed outside the molding compound 400, and the first connector 210 is completely exposed outside the molding compound 400, so as to facilitate welding the first connector 210 to the tab 510.

[0049] In embodiments of this application, the battery protection board includes at least two connecting mechanisms 200, wherein at least one connecting mechanism 200 is used to connect to the positive electrode tab 510 of the battery cell 500, and at least one connecting mechanism 200 is used to connect to the negative electrode tab 510. Each connecting mechanism 200 and the printed circuit board 100 enclose a receiving space 600 within which at least one component 300 is disposed. Thus, the component placement space on the printed circuit board 100 is further increased, allowing more components 300 to be arranged on the printed circuit board 100.

[0050] Furthermore, the connecting mechanism 200 corresponds one-to-one with the tab 510 in the battery cell 500. This means that the number of connecting mechanisms 200 in the battery protection board can be selected based on the battery cell 500 to which they are applied. For example, when the battery protection board is applied to a battery cell 500 with two tabs 510, the number of connecting mechanisms 200 is two; as another example, when the battery protection board is applied to a battery cell 500 with three tabs 510, the number of connecting mechanisms 200 is three; and as yet another example, when the battery protection board is applied to two battery cells 500 with two tabs 510 each, the number of connecting mechanisms 200 can be four.

[0051] Optionally, the battery protection board may include one or more molding compounds 400. When there is only one molding compound 400, multiple connectors in the battery protection board can be covered by the same molding compound 400. When there are multiple molding compounds 400, and the number of molding compounds 400 is less than the number of connecting mechanisms 200, each molding compound 400 covers at least one connecting mechanism 200. In other words, at least one molding compound 400 covers two or more connecting mechanisms 200. When there are multiple connecting mechanisms 200, and the number of molding compounds 400 is equal to the number of connecting mechanisms 200, the molding compounds 400 correspond one-to-one with the connecting mechanisms 200. Parts of the connecting mechanisms 200 are covered by the molding compounds 400 corresponding to the connecting mechanisms 200, and parts of the components 300 located within the accommodating space 600 enclosed by the connecting mechanisms 200 and the printed circuit board 100 are covered by the molding compounds 400 corresponding to the connecting mechanisms 200.

[0052] Preferably, the number of molding compounds 400 is equal to the number of connecting mechanisms 200, and there is a one-to-one correspondence between the molding compounds 400 and the connecting mechanisms 200. Thus, during the manufacturing process of the battery protection board, each connecting mechanism 200 and its corresponding component 300 can be molding, so that each connecting mechanism 200 can form a corresponding encapsulated structure, thereby improving the ease of soldering the connecting mechanism 200 to the printed circuit board 100.

[0053] When the molding compound 400 and the connecting mechanism 200 correspond one-to-one, the dimension of the molding compound 400 in the length direction L1 is larger than the dimension of the connecting mechanism 200 in the length direction L1, and the dimension of the molding compound 400 in the width direction L2 is larger than the dimension of the connecting mechanism 200 in the width direction L2. Thus, the component 300 and the connecting mechanism 200 only extend relative to the molding compound 400 in the thickness direction L3, allowing the molding compound 400 to better protect the component 300 and the connecting mechanism 200.

[0054] Taking a battery protection board adapted to a battery cell 500 with two tabs 510 as an example, the battery protection board has two connecting mechanisms 200. During the manufacturing process of this battery protection board, the two connecting mechanisms 200 and components 300 are respectively encapsulated to form two... Figure 5 and Figure 6 The battery protection board is manufactured by attaching the two package structures to the printed circuit board 100. After the package structures are attached, a receiving space 600 is formed between the first connector 210 and the printed circuit board 100. The components 300 in the package structure are located in the receiving space 600. The components 300 in the package structure and the first connector 210 occupy the same space, thereby increasing the space for component placement on the printed circuit board 100.

[0055] According to another aspect of this application, a battery is provided, such as... Figure 6 and Figure 7 As shown, the battery includes a cell 500 and the aforementioned battery protection board. The tabs 510 of the cell 500 are connected to the connecting mechanism 200, thereby realizing the connection between the cell 500 and the battery protection board.

[0056] 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 battery protection plate, characterized in that, The battery protection plate comprises a printed circuit board, a connecting mechanism and a plurality of components, the connecting mechanism comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with the printed circuit board through the second connecting piece, the first connecting piece and the printed circuit board are arranged along the thickness direction of the printed circuit board, the first connecting piece and the printed circuit board surround a receiving space, and at least one component is located in the receiving space.

2. The battery protection plate of claim 1, wherein, The second connecting piece comprises a connecting portion and an extension portion, the first end of the extension portion is connected with the first connecting piece, the second end of the extension portion is inclined towards the outside of the receiving space, and the second end of the extension portion is connected with the connecting portion, and the connecting portion is connected with the printed circuit board.

3. The battery protection plate of claim 1, wherein, The number of the second connecting pieces is greater than or equal to two, and at least two second connecting pieces are located on different sides of the first connecting piece in the length direction and / or the width direction of the printed circuit board.

4. The battery protection plate according to any one of claims 1-3, characterized in that, The battery protection plate comprises a plastic package, part of the components located in the receiving space is covered by the plastic package, part of the connecting mechanism is covered by the plastic package, and the surface of the second connecting piece facing away from the receiving space is exposed outside the plastic package.

5. The battery protection plate of claim 4, wherein, The end of the second connecting piece away from the first connecting piece extends out of the plastic package, and the surface of the component located in the receiving space and facing away from the first connecting piece is exposed outside the plastic package.

6. The battery protection plate of claim 4, wherein, The battery protection plate comprises at least two connecting mechanisms, and the at least two connecting mechanisms are arranged at intervals.

7. The battery protection plate of claim 6, wherein, The number of the plastic packages is equal to the number of the connecting mechanisms, the plastic packages correspond to the connecting mechanisms one by one, part of the connecting mechanisms is covered by the plastic package corresponding to the connecting mechanism, and part of the components located in the receiving space surrounded by the connecting mechanism and the printed circuit board is covered by the plastic package corresponding to the connecting mechanism.

8. The battery protection plate of claim 7, wherein, The size of the plastic package in the length direction of the printed circuit board is greater than the size of the connecting mechanism in the length direction, and the size of the plastic package in the width direction of the printed circuit board is greater than the size of the connecting mechanism in the width direction.

9. The battery protection plate of claim 7, wherein, The number of the plastic packages is less than the number of the connecting mechanisms, and each plastic package covers at least one connecting mechanism.

10. A battery, characterized by The battery comprises a battery core and the battery protection plate according to any one of claims 1-9, and the battery core is connected with the connecting mechanism.

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