CN221979198U - Battery protection board and battery - Google Patents

Abstract

The utility model provides a battery protection board and a battery, and relates to the field of battery technology. The battery protection board includes a flexible circuit board and a plurality of printed circuit boards, and the plurality of printed circuit boards are all connected to the flexible circuit board, and the flexible circuit board includes a first bonding portion and a second bonding portion connected to each other; a portion of the plurality of printed circuit boards is arranged on the first bonding portion, and another portion of the plurality of printed circuit boards is arranged on the second bonding portion; the flexible circuit board can be bent along a bending line between the first bonding portion and the second bonding portion, so that the plurality of printed circuit boards arranged on the first bonding portion and the second bonding portion overlap. At this time, a portion arranged in the plurality of printed circuit boards overlaps with another portion of the plurality of printed circuit boards. In this way, by bending the flexible circuit board, the space occupied by the battery protection board can be reduced, and the convenience of installing the battery protection board in a limited space can be improved.

Description

Battery protection board and battery

Technical Field

The present application relates to the field of battery technology, and in particular to a battery protection board and a battery.

Background Art

The battery protection board (PCM) is an important component that protects the battery from overcharging, over-discharging, short circuit and other hazards. The battery protection board includes a flexible printed circuit (FPC) and a printed circuit board (PCB). Generally, only one printed circuit board is set in the battery protection board. Due to the size of the printed circuit board, the layout space for setting electronic devices on the printed circuit board is limited, which cannot meet the use requirements of high-power batteries.

In order to meet the use requirements of high-power batteries, two printed circuit boards can be provided to increase the layout space. However, the battery protection board including the two printed circuit boards occupies a large space and is inconvenient to install in a limited space.

Utility Model Content

In view of this, the present application provides a battery protection board and a battery to solve the problem that the existing battery protection board occupies a large space and is inconvenient to install in a limited space.

According to one aspect of the present application, a battery protection board is provided, the battery protection board comprising a flexible circuit board and a plurality of printed circuit boards, the plurality of printed circuit boards are all connected to the flexible circuit board, and the flexible circuit board comprises a first bonding portion and a second bonding portion connected to each other;

A portion of the plurality of printed circuit boards is disposed on the first bonding portion, and another portion of the plurality of printed circuit boards is disposed on the second bonding portion;

The flexible circuit board can be bent along a bending line between the first bonding portion and the second bonding portion, so that the multiple printed circuit boards arranged on the first bonding portion and the second bonding portion are overlapped.

Preferably, there are two printed circuit boards, and the two printed circuit boards are attached to the same surface of the flexible circuit board. When the flexible circuit board is bent along the bending line, the two printed circuit boards face each other.

Preferably, the orthographic projections of the two printed circuit boards on the flexible circuit board are both located inside the flexible circuit board, and the orthographic projections of the two printed circuit boards on the flexible circuit board are arranged at intervals;

When the flexible circuit board is bent, the orthographic projection of one printed circuit board on the first bonding portion overlaps with the orthographic projection of another printed circuit board on the first bonding portion.

Preferably, the printed circuit board comprises a board body and an electronic device, the electronic device is arranged on the board body, the two board bodies included in the two printed circuit boards are attached to the same surface of the flexible circuit board, and the electronic device is arranged on a side of the board body away from the flexible circuit board;

When the flexible circuit board is bent, the electronic components on the two board bodies are arranged alternately.

Preferably, the flexible circuit board further comprises a mounting portion, and the mounting portion is connected to the first bonding portion;

The battery protection board also includes a connector, and the connector is arranged on the mounting portion.

Preferably, the number of the mounting parts is two, the two mounting parts are respectively connected to two ends of the first fitting part, and the two connectors are respectively arranged on the two mounting parts.

Preferably, the flexible circuit board further comprises a connecting portion, the connecting portion is connected to a side of the flexible circuit board facing away from the printed circuit board, and the connecting portion is used to be connected to a tab.

Preferably, the flexible circuit board comprises a plurality of connection parts, the plurality of connection parts are divided into two groups, and the first bonding part and the second bonding part are respectively bonded to one group of the connection parts on one side facing away from the printed circuit board.

Preferably, the plurality of connecting portions in each group are arranged at intervals, and the two groups of connecting portions correspond to positions of the two printed circuit boards on the first bonding portion and the second bonding portion, respectively.

According to another aspect of the present application, a battery is provided, the battery comprising the above-mentioned battery protection board.

In the battery protection board of the present application, multiple printed circuit boards are connected to a flexible circuit board. The flexible circuit board is divided into a first bonding portion and a second bonding portion by a bending line, a portion of the multiple printed circuit boards is arranged in the first bonding portion, and another portion of the multiple printed circuit boards is arranged in the second portion. The flexible circuit board can be bent along the bending line so that the first bonding portion overlaps with the second bonding portion. At this time, the portion arranged in the multiple printed circuit boards overlaps with another portion of the multiple printed circuit boards. In this way, by bending the flexible circuit board, the space occupied by the battery protection board can be reduced, and the convenience of installing the battery protection board in a limited space is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of a planar structure of a battery protection plate according to an embodiment of the present utility model from one viewing angle;

FIG2 is a schematic diagram showing a planar structure of a battery protection plate in another perspective of an embodiment of the present utility model;

FIG3 is a schematic diagram showing a three-dimensional structure of a battery protection plate after being bent according to an embodiment of the utility model;

FIG4 is a schematic diagram showing a planar structure of a battery protection plate after being bent according to an embodiment of the utility model;

FIG. 5 is a schematic diagram showing a planar structure of a flexible printed circuit board.

Icons: 1-flexible circuit board; 11-first bonding portion; 12-second bonding portion; 13-bending line; 14-installing portion; 2-first printed circuit board; 21-first board body; 22-first power device; 23-control device; 3-second printed circuit board; 31-second board body; 32-second power device; 4-connector; 5-connecting portion.

DETAILED DESCRIPTION

The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and/or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and/or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

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

Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be located "below" or "lower" relative to the 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 relational terms used herein will be interpreted accordingly.

The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and/or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and/or their combinations.

Variations in the shapes shown in the 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 drawings but include variations in shapes that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

According to one aspect of the present application, a battery protection board is provided, the battery protection board includes a flexible circuit board 1 and a plurality of printed circuit boards, the plurality of printed circuit boards are connected to the flexible circuit board 1, the flexible circuit board 1 is divided into a first bonding portion 11 and a second bonding portion 12 by a bending line 13, the first bonding portion 11 and the second bonding portion 12 are connected, the bending line 13 is located between the first bonding portion 11 and the second bonding portion 12, the first part of the plurality of printed circuit boards is arranged on the first bonding portion, and the second part of the plurality of printed circuit boards is arranged on the second bonding portion; the flexible circuit board 1 can bend the first bonding portion 11 and the second bonding portion 12 toward each other, for example, the second bonding portion 12 is bent toward the first bonding portion 11, specifically, along the bending line 13 located between the first bonding portion 11 and the second bonding portion 12, so that the first bonding portion 11 overlaps with the second bonding portion 12, and at this time, the first bonding portion 11 overlaps with the plurality of printed circuit boards arranged on the second bonding portion 12. At this time, a part arranged in the plurality of printed circuit boards overlaps with another part of the plurality of printed circuit boards. In this way, by bending the flexible circuit board 1, the space occupied by the battery protection board can be reduced, thereby improving the convenience of installing the battery protection board in a limited space.

Optionally, the number of printed circuit boards may be two, four or more, and the multiple printed circuit boards may be respectively arranged at different positions of the flexible circuit board 1. For example, when the number of printed circuit boards is two, the two printed circuit boards are respectively arranged on the first laminating portion 11 and the second laminating portion 12. For another example, when the number of printed circuit boards is four, two of the printed circuit boards are arranged on the first laminating portion 11, and the other two printed circuit boards are arranged on the second laminating portion.

The bending line 13 can extend along the length direction or the width direction of the flexible circuit board 1, that is, the flexible circuit board 1 can be bent along the width direction or the length direction. When the flexible circuit board 1 is bent along the width direction, the following two connectors 4 are located on different sides; when the flexible circuit board 1 is bent along the length direction, the following two connectors 4 are located on the same side.

Preferably, the number of printed circuit boards is two, and the two printed circuit boards are attached to the same surface of the flexible circuit board 1. As shown in FIG3, the bending line extends along the length direction of the flexible circuit board 1, so that the two printed circuit boards face each other after the flexible circuit board 1 is bent along the width direction. In order to facilitate the description of the relative position of the two printed circuit boards and the flexible circuit board 1, one of the two printed circuit boards is defined as the first printed circuit board 2 and the second printed circuit board 3, and the first printed circuit board 2 and the second printed circuit board 3 will be used for description below.

As shown in FIG. 1 , FIG. 2 and FIG. 4 , the first printed circuit board 2 is bonded to the first bonding portion 11, and the second printed circuit board 3 is bonded to the second bonding portion 12. The orthographic projections of the first printed circuit board 2 and the second printed circuit board 3 on the flexible circuit board 1 are both located inside the flexible circuit board 1. The orthographic projections of the first printed circuit board 2 on the flexible circuit board 1 and the orthographic projections of the second printed circuit board 3 on the flexible circuit board 1 are arranged alternately, which makes the area of the flexible circuit board 1 larger than the sum of the areas of multiple printed circuit boards. In this way, the area of the flexible circuit board 1 is increased, thereby increasing the overcurrent area of the flexible circuit board 1 and reducing the risk of the flexible circuit board 1 fusing. At the same time, by providing a flexible circuit board 1 with a larger area, the heat dissipation area of the battery protection board can be increased, thereby improving the heat dissipation performance of the battery protection board.

Furthermore, when the flexible circuit board is bent, the orthographic projection of the first printed circuit board 2 on the first bonding portion 11 coincides with the orthographic projection of the second bonding portion 12 on the flexible circuit board 1. In this way, when the flexible circuit board 1 is bent along the bending line 13, the positions of the two printed circuit boards correspond, further reducing the space occupied by the two printed circuit boards.

In an embodiment of the present application, as shown in Figures 1, 2 and 5, the printed circuit board includes a board body and electronic devices, the electronic devices include power devices and control devices 23, and the two printed circuit boards are attached to the same surface of the flexible circuit board. When the flexible circuit board 1 is bent along the bending line 13, the electronic devices on the two board bodies are staggered.

Specifically, as shown in FIG. 4 , the first printed circuit board 2 includes a first board body 21, a first power device 22 and a control device 23, wherein the control device 23 and the first power device 22 are arranged on the first board body 21, and the second printed circuit board 3 includes a second board body 31 and a second power device 32, wherein the second power device 32 is arranged on the second board body 31. The first board body 21 and the second board body 31 are bonded to the same surface of the flexible circuit board 1, and when the flexible circuit board 1 is bent along the bending line 13, the first power device 22, the control device 23 and the second power device 32 are located between the first board body 21 and the second board body 31, the first power device 22 and the second power device 32 are arranged alternately, the control device 23 is located on one side of the first power device 22, and the second power device 32 is not arranged on the position of the second board body 31 opposite to the first power device 22. In this way, the height of the two printed circuit boards after bending can be reduced, thereby avoiding the problem of excessive thickness of the battery protection board caused by the high overlap of electronic devices on the two printed circuit boards.

Optionally, the power device may be a resistor, a fuse, etc., and the control device 23 may be an IC, a power meter, etc.

In addition, the power devices are respectively arranged on the first printed circuit board 2 and the second printed circuit board 3, which increases the layout space of the power devices, improves the heat dissipation area, and further improves the heat dissipation capacity of the battery protection board.

As shown in Figure 4, the battery protection board also includes a connector 4, and the flexible circuit board 1 also includes a mounting portion 14. The length of the first bonding portion 11 and the second bonding portion 12 are equal. The mounting portion 14 is connected to the end of the first bonding portion 11 in the length direction. The connector 4 is welded on the mounting portion 14, and the connector 4 can realize the external connection of the battery protection board.

Optionally, there are two mounting portions 14 , which are respectively connected to two ends of the first fitting portion (the left end and the right end in the perspective of FIG. 4 ), and the battery protection board can be connected to the outside through two connectors 4 .

In the embodiment of the present application, as shown in FIG. 2 and FIG. 4 , the flexible circuit board 1 further includes a connecting portion 5, which is connected to the surface of the flexible circuit board 1 facing away from the printed circuit board, and is used to connect to the tab. The connecting portion 5 is arranged on the surface of the flexible circuit board 1 facing away from the printed circuit board, which can facilitate the connection between the connecting portion 5 and the tab. Optionally, the connecting portion 5 is a nickel sheet.

Furthermore, the flexible circuit board 1 includes a plurality of connection parts 5, which are divided into two groups, and the plurality of connection parts 5 are arranged at intervals, and the two groups of connection parts 5 are respectively attached to the first bonding part 11 and the second bonding part 12 on the side facing away from the printed circuit board. The number of connection parts 5 in each group can be one, two or more.

Preferably, there are two connecting parts 5 in each group, and the two connecting parts 5 are arranged at intervals. The arrangement positions of the two groups of connecting parts 5 correspond to two printed circuit boards respectively, which can facilitate the connection of the connecting parts with the corresponding printed circuit boards through the flexible circuit board 1.

Taking the example that the number of connecting parts 5 is 4 and the number of printed circuit boards is 2, the first printed circuit board 2 is arranged on the first bonding part 11, and the second printed circuit board 3 is arranged on the second bonding part 12. When the flexible circuit board 1 is bent along the bending line 13, the first printed circuit board 2 and the second printed circuit board 3 face each other, and the first power device 22 in the first printed circuit board 2 and the second power device 32 in the second printed circuit board 3 are arranged alternately, and the control device 23 in the first printed circuit board 2 is located on one side of the first power device 22. Connectors 4 are arranged on the two connecting parts 5 at both ends of the first bonding part 11, and the connectors 4 are used to connect to the outside of the battery protection board. Two connecting parts 5 are arranged on the surface of the first bonding part 11 facing away from the first printed circuit board 2, and two connecting parts 5 are also arranged on the surface of the second bonding part 12 facing away from the second printed circuit board 3.

According to another aspect of the present application, a battery is provided, the battery comprising the above-mentioned battery protection board and a battery cell, the pole ear of the battery cell is connected to the connecting part 5, and the battery has the same technical effect as the above-mentioned battery protection board, which will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims (10)

1. A battery protection board, characterized in that the battery protection board comprises a flexible circuit board and a plurality of printed circuit boards, the plurality of printed circuit boards are all connected to the flexible circuit board, and the flexible circuit board comprises a first bonding portion and a second bonding portion connected to each other; A portion of the plurality of printed circuit boards is disposed on the first bonding portion, and another portion of the plurality of printed circuit boards is disposed on the second bonding portion; The flexible circuit board can be bent along a bending line between the first bonding portion and the second bonding portion, so that the multiple printed circuit boards arranged on the first bonding portion and the second bonding portion are overlapped. 2. The battery protection board according to claim 1 is characterized in that the number of the printed circuit boards is two, the two printed circuit boards are attached to the same surface of the flexible circuit board, and when the flexible circuit board is bent along the bending line, the two printed circuit boards face each other. 3. The battery protection board according to claim 1, characterized in that the orthographic projections of the two printed circuit boards on the flexible circuit board are both located inside the flexible circuit board, and the orthographic projections of the two printed circuit boards on the flexible circuit board are arranged at intervals; When the flexible circuit board is bent, the orthographic projection of one printed circuit board on the first bonding portion overlaps with the orthographic projection of another printed circuit board on the first bonding portion. 4. The battery protection board according to claim 3, characterized in that the printed circuit board comprises a board body and an electronic device, the electronic device is arranged on the board body, the two board bodies included in the two printed circuit boards are attached to the same surface of the flexible circuit board, and the electronic device is arranged on a side of the board body away from the flexible circuit board; When the flexible circuit board is bent, the electronic components on the two board bodies are arranged alternately. 5. The battery protection board according to any one of claims 1 to 4, characterized in that the flexible circuit board further comprises a mounting portion, and the mounting portion is connected to the first bonding portion; The battery protection board also includes a connector, and the connector is arranged on the mounting portion. 6. The battery protection board according to claim 5, characterized in that there are two mounting parts, the two mounting parts are respectively connected to two ends of the first fitting part, and the two connectors are respectively arranged on the two mounting parts. 7. The battery protection board according to claim 1 is characterized in that the flexible circuit board further comprises a connecting portion, the connecting portion is connected to a side of the flexible circuit board facing away from the printed circuit board, and the connecting portion is used to connect to the tab. 8. The battery protection board according to claim 7 is characterized in that the flexible circuit board comprises a plurality of connecting parts, the plurality of connecting parts are divided into two groups, and the first bonding part and the second bonding part are respectively bonded to one group of the connecting parts on one side facing away from the printed circuit board. 9. The battery protection board according to claim 8, characterized in that the multiple connecting parts in each group are arranged at intervals, and the two groups of connecting parts correspond to the positions of the two printed circuit boards on the first bonding part and the second bonding part respectively. 10. A battery, characterized in that the battery comprises the battery protection board according to any one of claims 1 to 9.