Battery protection board assembly, battery assembly and electronic equipment

Abstract

The utility model discloses a battery protection board assembly, a battery assembly and electronic equipment, the battery protection board assembly comprises a battery protection board, a first connector and a second connector, at least part of the battery protection board is overlapped with the first connector and the second connector, and the battery protection board is located between the first connector and the second connector in the overlapping direction. The battery protection board is used for being connected with a battery and is connected with the first connector and the second connector, and the first connector and the second connector are both used for being connected with a mainboard. Through the scheme disclosed by the invention, the area occupied by the battery protection plate assembly in the plane parallel to the mainboard can be reduced, so that the size of the battery can be increased, and the capacity of the battery is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery protection board assembly, a battery assembly, and an electronic device. Background Art

[0002] The battery protection board assembly is a circuit board assembly that protects rechargeable batteries. It is often used to prevent damage to the battery due to overcharging, over-discharging, short circuit, overcurrent or abnormally high temperature, thereby extending the battery life and ensuring safe use.

[0003] In related technologies, a battery protection assembly often includes a battery protection board and a connector. The battery protection board is connected to the battery and the connector via an FPC cable, and the connector is connected to the motherboard. The battery protection board is located between the motherboard and the battery.

[0004] However, in the above structure, the battery protection board assembly will occupy a larger area in a plane parallel to the main board, which will cause the size of the battery in this direction to be relatively reduced, thereby reducing the battery capacity. Utility Model Content

[0005] The embodiments of the present disclosure provide a battery protection board assembly, a battery assembly, and an electronic device that can solve the above-mentioned technical problems existing in the related art. The technical solution is as follows:

[0006] In a first aspect, a battery protection board assembly is provided, the battery protection board assembly comprising a battery protection board, a first connector and a second connector;

[0007] At least a portion of the battery protection board overlaps with the first connector and the second connector, and is located between the first connector and the second connector in the overlapping direction;

[0008] The battery protection board is used to connect to the battery and is connected to the first connector and the second connector respectively;

[0009] The first connector and the second connector are both used to connect to a mainboard.

[0010] In one possible implementation, the battery protection board includes a first circuit board and a second circuit board connected to each other, the first circuit board is connected to the battery, and the second circuit board is located between the first connector and the second connector and is connected to the first connector and the second connector respectively.

[0011] In one possible implementation, the battery protection board has multiple electronic components, electronic components with a thickness greater than a preset thickness among the multiple electronic components are located on the second circuit board, and electronic components with a thickness less than or equal to the preset thickness among the multiple electronic components are located on the first circuit board.

[0012] In a possible implementation, the first circuit board is parallel to an end surface of the battery.

[0013] In a possible implementation, the second circuit board includes a first module and a second module stacked together, the first module is connected to the first connector and the first circuit board, and the second circuit board is connected to the second connector and the first circuit board.

[0014] In a possible implementation, the first module and the second module are electrically connected via an FPC cable.

[0015] In a possible implementation, the first module and the second module are fixedly connected by double-sided tape or injection molding adhesive.

[0016] In a possible implementation, the second circuit board further includes a foldable soft board, and the foldable soft board is used to fix the first module and the second module.

[0017] In a possible implementation, the second circuit board is an embedded PCB structure.

[0018] In a possible implementation, the entire battery protection board is located between the first connector and the second connector.

[0019] In a second aspect, a battery assembly is provided, which includes the battery protection plate assembly described in the first aspect.

[0020] In a third aspect, an electronic device is provided, comprising the battery protection board assembly and a mainboard according to the first aspect;

[0021] The mainboard has an interface, which is used to accommodate the first connector, the second connector and at least part of the battery protection board, and is used to connect with the first connector and the second connector.

[0022] The beneficial effects of the technical solution provided by the present disclosure include at least:

[0023] Placing at least a portion of the battery protection board between the first connector and the second connector can reduce the area occupied by the battery protection board assembly in a plane parallel to the mainboard, thereby increasing the size of the battery and improving the battery capacity.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 is a schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0027] Figure 2 is a partial schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0028] Figure 3 is a schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0029] Figure 4 is a partial schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0030] Figure 5 is a partial schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0031] Figure 6 is a partial schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0032] Figure 7 is a partial schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0033] Figure 8 is a partial schematic diagram of a battery protection board assembly provided by an embodiment of the present disclosure;

[0034] Figure 9 It is a schematic diagram of a protection circuit in a battery protection board in the related art;

[0035] Figure 10 This is a schematic diagram of a battery protection board assembly in the related art.

[0036] Reference numerals:

[0037] 1. Battery protection board;

[0038] 1a, first circuit board; 1b, second circuit board;

[0039] 101, first protection circuit; 1011, first switch component; 1012, first protection chip; 102, second protection circuit; 1021, second switch component; 1022, second protection chip; 103, power measurement circuit;

[0040] 11. First module; 12. Second module; 13. Double-sided tape; 14. Injection molding glue; 15. Flexible board;

[0041] 2. First connector; 3. Second connector;

[0042] 4. FPC cable; 41. first area; 42. second area; 42a. first part; 42b. second part;

[0043] 200. Battery; 201. Tab. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0045] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] Figure 9 A circuit diagram of a protection circuit on a battery protection board 1 is shown. The protection circuit includes a fuel meter, a first protection circuit 101, and a second protection circuit 102. The first protection circuit 101 includes a first protection chip 1012 and two first switch components 1011. The second protection circuit 102 includes a second protection chip 1022 and two second switch components 1021. The first switch component 1011 and the second switch component 1021 each include two anti-series MOS transistors. The gates of the MOS transistors in the first switch component 1011 are connected to the first protection chip 1012, and the gates of the MOS transistors in the second switch component 1021 are connected to the second protection chip 1022. Each first switch component 1011 is connected in series with each second switch component 1021 in a one-to-one correspondence. The series circuits formed by the first switch components 1011 and the second switch components 1021 are connected in parallel to share the current in the loop to prevent overload of a single MOS transistor.

[0047] In related technologies, such as Figure 10As shown, the battery protection board assembly includes a battery protection board 1, a first connector 2 and a second connector 3. The battery protection board 1 is arranged on the side of the battery 200. Two FPC cables 4 are respectively arranged on both sides of the length direction of the battery protection board 1 and are respectively welded to the two pole ears 201 of the battery 200 to realize the connection between the battery protection board 1 and the battery 200. The first connector 2 and the second connector 3 are respectively welded on the two FPC cables 4 and plugged into the interface of the mainboard, thereby realizing the electrical connection between the battery protection board 1 and the mainboard.

[0048] However, in the solution of the related art, on the one hand, the battery protection board 1 will occupy the space in the arrangement direction of the battery 200 and the main board, resulting in the battery 200 being unable to occupy the entire space between the battery 200 and the main board, thereby resulting in a lower capacity of the battery 200. On the other hand, since connectors are provided on both sides of the length direction of the battery protection board 1, two interfaces need to be opened on the main board respectively, which will occupy more space on the main board and affect the layout of various electronic components on the main board.

[0049] The present disclosure provides a battery protection board assembly, such as Figures 1-4 As shown, the battery protection board assembly includes a battery protection board 1, a first connector 2, and a second connector 3. At least a portion of the battery protection board 1 overlaps with the first connector 2 and the second connector 3, and is located between the first connector 2 and the second connector 3 in the overlapping direction. The battery protection board 1 is used to connect to the battery 200 and is connected to the first connector 2 and the second connector 3 respectively. The first connector 2 and the second connector 3 are both used to connect to the motherboard.

[0050] Among them, placing at least a portion of the battery protection board 1 between the first connector 2 and the second connector 3 can reduce or prevent the battery protection board 1 from occupying the space between the battery 200 and the mainboard in the first direction (the arrangement direction of the battery 200 and the mainboard), thereby increasing the size of the battery 200 and improving the capacity of the battery 200. In addition, in the related art, two interfaces need to be provided on the mainboard. However, when using the battery protection board assembly provided by the embodiment of the present disclosure, since the first connector 2 and the second connector 3 are sandwiched on both sides of the battery protection board 1 and the two are only offset in the thickness direction of the battery protection board 1, only one interface needs to be provided on the mainboard to achieve the connection between the two connectors, thereby reducing the space for the interface and optimizing the layout on the mainboard.

[0051] It should be noted that when using the battery protection board assembly provided in the embodiment of the present disclosure, it is necessary to improve the interface on the mainboard, which needs to be provided with electrical connection parts that are respectively adapted to the first connector 2 and the second connector 3, so as to realize the electrical connection between the first connector 2 and the second connector 3 in the disclosed embodiment and the mainboard.

[0052] It should be noted that the embodiment of the present disclosure does not limit the connection method between the battery protection board 1 and the first connector 2 and the second connector 3.

[0053] For example, the battery protection board 1 is connected to the first connector 2 and the second connector 3 via the FPC cable 4. At the same time, the FPC cable 4 is welded to the tab 201 on the battery 200, thereby achieving connection between the battery protection board 1, the battery 200, and the mainboard.

[0054] In some examples, such as Figure 3-Figure 4 As shown, the battery protection board 1 includes a first circuit board 1a and a second circuit board 1b connected to each other. The first circuit board 1a is connected to the battery 200, and the second circuit board 1b is located between the first connector 2 and the second connector 3, and is connected to the first connector 2 and the second connector 3 respectively.

[0055] Specifically, the battery protection board 1 is split into a first circuit board 1a and a second circuit board 1b, with only the second circuit board 1b placed between the first connector 2 and the second connector 3. This prevents the thickness between the first connector 2 and the second connector 3 from being excessive, thereby affecting the spatial layout of the mainboard. Furthermore, only the first circuit board 1a is located between the battery protection board 1 and the battery 200, and only thin electronic components are fixed to the first circuit board 1a. This reduces the size of the portion connecting the battery protection board 1 and the battery 200 in the first direction, thereby increasing the size of the battery 200 in the first direction and improving the capacity of the battery 200.

[0056] It should be noted that the embodiment of the present disclosure does not limit the connection method between the first circuit board 1a and the second circuit board 1b.

[0057] For example, the first circuit board 1a and the second circuit board 1b are connected via a wire.

[0058] For example, the first circuit board 1 a and the second circuit board 1 b are connected via an FPC cable 4 , and both are soldered to the FPC cable 4 .

[0059] In some examples, the battery protection board 1 has multiple electronic components, and the electronic components with a thickness greater than a preset thickness are located on the second circuit board 1b, and the electronic components with a thickness less than or equal to the preset thickness are located on the first circuit board 1a.

[0060] Among them, placing the larger electronic components with greater thickness in the battery protection board 1 between the first connector 2 and the second connector 3 can effectively reduce the size of the battery protection board 1 in the first direction, thereby increasing the size of the battery 200 in the first direction to increase the capacity of the battery 200.

[0061] Exemplarily, the portion of the plurality of electronic components that is greater than the preset thickness may be a control chip, and the portion of the plurality of electronic components that is less than or equal to the preset thickness may be a MOS transistor.

[0062] In some examples, such as Figure 3 As shown, the first circuit board 1 a is parallel to the end surface of the battery 200 .

[0063] In this way, the first circuit board 1 a can occupy the least space in the first direction, so as to increase the size of the battery 200 in the first direction and improve the capacity of the battery 200 .

[0064] In some examples, such as Figure 5 As shown, the second circuit board 1b includes a first module 11 and a second module 12 stacked together. The first module 11 is connected to the first connector 2 and the first circuit board 1a, and the second circuit board 1b is connected to the second connector 3 and the first circuit board 1a.

[0065] Among them, the second circuit board 1b is split into a stacked first module 11 and a second module 12, which are connected to the first connector 2 and the second connector 3 through the first module 11 and the second module 12 respectively. If one of the two connectors is damaged or has poor contact with the interface on the mainboard, the module connected to this connector is electrically disconnected from the mainboard. However, since the other of the two connectors remains electrically connected to the mainboard, the electrical connection between the other module and the mainboard will not be disconnected, thereby ensuring that when the electrical connection between one of the first module 11 and the second module 12 and the mainboard is abnormally disconnected, the other can still be used.

[0066] Exemplarily, the battery protection board 1 includes a first protection circuit 101 and a second protection circuit 102. The first protection circuit 101 includes multiple first switch components 1011 and a first protection chip 1012 for controlling the opening and closing of the multiple first switch components 1011. The second protection circuit 102 includes multiple second switch components 1021 and a second protection chip 1022 for controlling the opening and closing of the multiple second switch components 1021. The multiple first switch components 1011 and the multiple second switch components 1021 are connected in series in a one-to-one correspondence to form multiple switch branches, and the multiple switch branches are connected in parallel. The first module 11 and the second module 12 each include at least one switch branch.

[0067] Among them, when one of the first connector 2 or the second connector 3 is damaged or has poor contact with the interface on the mainboard, since the other one also includes at least one switch branch, dual protection of the first protection circuit 101 and the second protection circuit 102 can be achieved, thereby ensuring the stability of the electrical connection between the battery protection board 1 and the mainboard.

[0068] Exemplarily, the battery protection board 1 includes a power measurement circuit 103 , which is used to detect the power level of the battery and can be placed on the first circuit board 1 a .

[0069] In some examples, such as Figure 5 As shown, the first module 11 and the second module 12 are electrically connected via an FPC cable 4 .

[0070] Among them, the FPC cable 4 has a multi-layer structure, which includes a first area 41 and a second area 42. The second area 42 has a first part 42a and a second part 42b spaced apart from each other. The first module 11 and the second module 12 are both located between the first part 42a and the second part 42b, and the first module 11 and the second module 12 both have solder pads. The solder pads of the first module 11 are soldered to the first part 42a, and the solder pads of the second module 12 are soldered to the second part 42b. The first connector 2 is soldered on the side of the first part 42a away from the first module 11, and the second connector 3 is soldered on the side of the second part 42b away from the second module 12.

[0071] In some examples, such as Figure 6 As shown, the first module 11 and the second module 12 are fixedly connected by double-sided tape 13 .

[0072] In some examples, such as Figure 7 As shown, the first module 11 and the second module 12 are fixedly connected by injection molding glue 14 .

[0073] Among them, the first module 11 and the second module are connected by double-sided tape 13 or injection molding glue 14, which can fix the first module 11 and the second module 12, thereby preventing the first connector 2 and the second connector 3 respectively connected to the first module 11 and the second module 12 from moving during the insertion into the installation slot during use, thereby improving the stability of the connection between the first module and the second module 12.

[0074] In some examples, such as Figure 8 As shown, the second circuit board 1 b further includes a foldable soft board 15 , which is used to fix the first module 11 and the second module 12 .

[0075] In some examples, the second circuit board 1 b is an embedded PCB structure.

[0076] In this way, the second circuit board 1b can be easily installed, thereby improving the convenience of installing the second circuit board 1b.

[0077] In some examples, such as Figure 1-Figure 2 As shown, the entire battery protection board 1 is located between the first connector 2 and the second connector 3 .

[0078] Among them, the entire battery protection board 1 is placed between the first connector 2 and the second connector 3, and the battery protection board 1 does not occupy the space between the battery 200 and the main board in the first direction at all, thereby maximizing the size of the battery 200 to increase the capacity of the battery 200.

[0079] Based on the same concept, the embodiment of the present disclosure further provides a battery 200 assembly, which includes the battery protection board assembly mentioned above.

[0080] Based on the same concept, an embodiment of the present disclosure further provides an electronic device comprising the aforementioned battery protection board assembly and a mainboard. The mainboard has an interface for accommodating a first connector 2, a second connector 3, and at least a portion of the battery protection board 1, and for connecting to the first connector 2 and the second connector 3.

[0081] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0083] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0084] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0085] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0086] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery protection board assembly, characterized in that: The battery protection board assembly comprises a battery protection board (1), a first connector (2) and a second connector (3); At least a portion of the battery protection board (1) overlaps with the first connector (2) and the second connector (3), and is located between the first connector (2) and the second connector (3) in the overlapping direction; The battery protection board (1) is used to connect to the battery (200) and is respectively connected to the first connector (2) and the second connector (3); The first connector (2) and the second connector (3) are both used for connecting to a mainboard.

2. The battery protection board assembly according to claim 1, characterized in that: The battery protection board (1) comprises a first circuit board (1a) and a second circuit board (1b) connected to each other, wherein the first circuit board (1a) is connected to the battery (200), and the second circuit board (1b) is located between the first connector (2) and the second connector (3), and is connected to the first connector (2) and the second connector (3) respectively.

3. The battery protection board assembly according to claim 2, characterized in that: The battery protection board (1) has a plurality of electronic components, wherein electronic components having a thickness greater than a preset thickness among the plurality of electronic components are located on the second circuit board (1b), and electronic components having a thickness less than or equal to the preset thickness among the plurality of electronic components are located on the first circuit board (1a).

4. The battery protection board assembly according to claim 2, characterized in that: The first circuit board (1a) is parallel to the end surface of the battery (200).

5. The battery protection board assembly according to claim 2, characterized in that: The second circuit board (1b) comprises a first module (11) and a second module (12) stacked together, the first module (11) being connected to the first connector (2) and the first circuit board (1a), and the second circuit board (1b) being connected to the second connector (3) and the first circuit board (1a).

6. The battery protection board assembly according to claim 5, characterized in that: The first module (11) and the second module (12) are electrically connected via an FPC cable (4).

7. The battery protection board assembly according to claim 5, characterized in that: The first module (11) and the second module (12) are fixedly connected by double-sided adhesive (13) or injection molding adhesive (14).

8. The battery protection board assembly according to claim 5, characterized in that: The second circuit board (1b) further comprises a foldable soft board (15), and the foldable soft board (15) is used to fix the first module (11) and the second module (12).

9. The battery protection board assembly according to claim 5, characterized in that: The second circuit board (1b) is an embedded PCB structure.

10. The battery protection board assembly according to claim 1, characterized in that: The entire battery protection board (1) is located between the first connector (2) and the second connector (3).

11. A battery assembly, characterized in that: The battery assembly includes the battery protection plate assembly according to any one of claims 1-10.

12. An electronic device, characterized in that: The electronic device comprises the battery protection board assembly and the main board according to any one of claims 1 to 10; The mainboard has an interface, the interface is used to accommodate the first connector (2), the second connector (3) and at least part of the battery protection board (1), and is used to interface with the first connector (2) and the second connector (3).

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