Battery protection board, battery and mobile terminal

Abstract

The utility model relates to the technical field of batteries, and discloses a battery protection board, a battery and a mobile terminal, the battery protection board comprises a first rigid circuit board, a second rigid circuit board, a flexible circuit board, a power module, a control module and a signal circuit, the flexible circuit board is connected with the first rigid circuit board and the second rigid circuit board, and the power module is connected with the control module. The power module is arranged on the first rigid circuit board, the control module is arranged on the second rigid circuit board, and the signal circuit is connected with the power module and the control module. Because the power module and the control module are respectively arranged on the first rigid circuit board and the second rigid circuit board, the power module and the control module can be respectively wired on the first rigid circuit board and the second rigid circuit board, the wiring of the control module on the first rigid circuit board is less, and the power module has enough wiring space. The wiring difficulty of the power module is relatively low, and the enough wiring width of the power module can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery protection board, a battery and a mobile terminal. Background Art

[0002] The battery protection board is mainly an integrated circuit board that protects rechargeable batteries. It has a power module and a control module. In the related art, the battery protection board is a single board, and the power module and the control module are both routed on the board. However, the electronic components in the power module generally include MOS tubes, precision resistors and FUSEs. Therefore, the power module needs to have a certain routing width to avoid serious heating problems and ensure the performance and reliability of the power module. However, for a battery protection board with this structure, since the power module and the control module are both routed on the same board, the wiring space for the two is limited. Therefore, the routing of the power module is relatively difficult, and the problem of insufficient routing width of the power module is prone to occur. Utility Model Content

[0003] The primary purpose of the utility model is to provide a battery protection board, which has a relatively low difficulty in routing the power module and can ensure that the power module has a sufficient routing width.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a battery protection board, including a first rigid circuit board, a second rigid circuit board, a flexible circuit board, a power module, a control module and a signal circuit, the flexible circuit board connects the first rigid circuit board and the second rigid circuit board, the power module is arranged on the first rigid circuit board, the control module is arranged on the second rigid circuit board, and the signal circuit connects the power module and the control module.

[0005] In a specific embodiment of the utility model, the signal circuit includes a first connection section, a second connection section and a third connection section connected in sequence, the first connection section is arranged on the first rigid circuit board and connected to the power module, the second connection section is arranged on the flexible circuit board, and the third connection section is arranged on the second rigid circuit board and connected to the control module.

[0006] In a specific embodiment of the present invention, the first rigid circuit board and the second rigid circuit board are both long strip-shaped plate structures, and the flexible circuit board connects one end of the first rigid circuit board along its width direction and one end of the second rigid circuit board along its width direction.

[0007] In a specific embodiment of the present invention, one end of the flexible circuit board connected to the first rigid circuit board is at least partially oriented toward the power module.

[0008] In a specific embodiment of the utility model, the signal circuit includes a first pad and a second pad connected to each other;

[0009] The first rigid circuit board and the second rigid circuit board are arranged parallel to each other along a first direction, the first rigid circuit board has a first connecting through hole arranged along the first direction, the power module is arranged on the side of the first rigid circuit board facing away from the second rigid circuit board, the first soldering pad is arranged on the side of the first rigid circuit board facing the second rigid circuit board, and is connected to the power module through the first connecting through hole; the second rigid circuit board has a second connecting through hole arranged along the first direction, the control module is arranged on the side of the second rigid circuit board facing away from the first rigid circuit board, the second soldering pad is arranged on the side of the second rigid circuit board facing the first rigid circuit board, and is connected to the control module through the second connecting through hole.

[0010] In a specific embodiment of the utility model, it further comprises a temperature sensor, wherein the temperature sensor is arranged on the second rigid circuit board, and the temperature sensor is electrically connected to the control module.

[0011] The utility model also provides a battery, comprising a battery cell and a battery protection board as described above, wherein the battery cell has a positive electrode ear and a negative electrode ear, the first rigid circuit board has a first connection area, a second connection area and a third connection area, one of the first connection area and the second connection area is connected to the positive electrode ear, and the other is connected to the negative electrode ear, and the third connection area is used to connect to the mainboard of the mobile terminal;

[0012] The third connection area, the first connection area, the control module, the second connection area, and the power module are electrically connected in sequence, and the power module is electrically connected to the third connection area.

[0013] In a specific embodiment of the present invention, the power module is located between the first connection area and the second connection area.

[0014] In a specific embodiment of the present invention, a positioning groove is provided on the outer peripheral wall of the second rigid circuit board, and both ends of the positioning groove along the thickness direction of the second rigid circuit board are open ends.

[0015] The utility model also provides a mobile terminal, comprising the battery as described above.

[0016] The battery protection board, battery and mobile terminal of the utility model embodiment have the following beneficial effects compared with the prior art:

[0017] The power module and the control module of the battery protection board of the utility model are respectively arranged on the first rigid circuit board and the second rigid circuit board. The power module and the control module can be routed on the first rigid circuit board and the second rigid circuit board respectively. The control module has relatively few routes on the first rigid circuit board, and the power module has sufficient routing space. Based on this, the routing difficulty of the power module is relatively low, and it can be ensured that the power module has sufficient routing width. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a battery protection board according to an embodiment of the utility model;

[0019] Figure 2 This is a top view of another battery protection board according to an embodiment of the utility model;

[0020] Figure 3 This utility model embodiment Figure 2 The bottom view of the battery protection board shown;

[0021] Figure 4 This utility model embodiment Figure 2 A schematic diagram of the structure of the connection between the first pad and the second pad in the battery protection board is shown.

[0022] In the figure, 1, first rigid circuit board; 11, first connecting through hole; 12, first connecting area; 13, second connecting area; 14, third connecting area; 2, second rigid circuit board; 21, second connecting through hole; 22, positioning groove; 3, flexible circuit board; 4, power module; 5, control module; 6, signal line; 61, first connecting section; 62, second connecting section; 63, third connecting section; 64, first soldering pad; 65, second soldering pad; 7, temperature sensor; X, first direction. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the application examples, "parallel" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. In addition, "perpendicular" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distance, equal angle or equal area means that the tolerance range is -1% to 1%.

[0028] like Figure 1As shown, a preferred battery protection board of an embodiment of the utility model includes a first rigid circuit board 1, a second rigid circuit board 2, a flexible circuit board 3, a power module 4, a control module 5 and a signal line 6, the flexible circuit board 3 connects the first rigid circuit board 1 and the second rigid circuit board 2, the power module 4 is arranged on the first rigid circuit board 1, the control module 5 is arranged on the second rigid circuit board 2, and the signal line 6 connects the power module 4 and the control module 5.

[0029] Specifically, since the power module 4 and the control module 5 are respectively arranged on the first rigid circuit board 1 and the second rigid circuit board 2, the power module 4 and the control module 5 can be routed on the first rigid circuit board 1 and the second rigid circuit board 2 respectively. The control module 5 has relatively few routes on the first rigid circuit board 1, and the power module 4 has sufficient routing space. Based on this, the routing difficulty of the power module 4 is relatively low, and it can be ensured that the power module 4 has sufficient routing width.

[0030] In this embodiment, the signal line 6 includes a first connection section 61, a second connection section 62 and a third connection section 63 connected in sequence. The first connection section 61 is arranged on the first rigid circuit board 1 and connected to the power module 4, the second connection section 62 is arranged on the flexible circuit board 3, and the third connection section 63 is arranged on the second rigid circuit board 2 and connected to the control module 5. Based on this, the effective connection between the power module 4 and the control module 5 can be ensured to ensure the normal operation of the battery protection board. The flexible circuit board 3 is a flexible printed circuit board. The signal line 6 is routed in the above manner. The first rigid circuit board 1 and the second rigid circuit board 2 can rotate relative to each other with the flexible circuit board 3 as the center. Based on this, the first rigid circuit board 1 and the second rigid circuit board 2 can rotate within a certain range according to actual conditions to change the relative position when used, and the flexibility of use is relatively high.

[0031] Furthermore, the first rigid circuit board 1 and the second rigid circuit board 2 are both long thin plate structures, and the flexible circuit board 3 connects one end of the first rigid circuit board 1 along its width direction and one end of the second rigid circuit board 2 along its width direction. At this time, the electronic components of the power module 4 are arranged along the length direction of the first rigid circuit board 1, and the electronic components of the control module 5 are arranged along the length direction of the second rigid circuit board 2. The width of the first rigid circuit board 1 and the second rigid circuit board 2 can be shortened as much as possible, making the structure of the battery protection board more compact. Moreover, the flexible circuit board 3 connects one end of the first rigid circuit board 1 and the second rigid circuit board 2 in the width direction, and the signal line 6 extends from one end of the first rigid circuit board 1 in the width direction through the flexible circuit board to the second rigid circuit board 2, without having to be routed for a long distance along the length direction of the first rigid circuit board 1, making the signal line 6 easy to wire.

[0032] Furthermore, one end of the flexible circuit board 3 connected to the first rigid circuit board 1 is at least partially facing the power module 4. At this time, the distance between the flexible circuit board 3 and the power module 4 is relatively close, and the first connecting section 61 can be connected to the second connecting section 62 without long-distance routing, which facilitates wiring.

[0033] In other embodiments, Figure 2-4 As shown, the signal circuit 6 includes a first solder pad 64 and a second solder pad 65 connected to each other; the first rigid circuit board 1 and the second rigid circuit board 2 are arranged parallel to each other along the first direction X, the first rigid circuit board 1 has a first connecting through hole 11 arranged along the first direction X, the power module 4 is arranged on the side of the first rigid circuit board 1 facing away from the second rigid circuit board 2, the first solder pad 64 is arranged on the side of the first rigid circuit board facing the second rigid circuit board 2, and is connected to the power module 4 through the first connecting through hole 11; the second rigid circuit board 2 has a second connecting through hole 21 arranged along the first direction X, the control module 5 is arranged on the side of the second rigid circuit board 2 facing away from the first rigid circuit board 1, the second solder pad 65 is arranged on the side of the second rigid circuit board 2 facing the first rigid circuit board 1, and is connected to the control module 5 through the second connecting through hole 21. Based on this, the effective connection between the control module 5 and the power module 4 can also be guaranteed to ensure the normal operation of the battery protection board. Moreover, the signal line 6 does not need to be routed through the first rigid circuit board 1, the flexible circuit board, and the second flexible circuit board to connect the control module 5 and the power module 4. The signal line 6 does not occupy the wiring space on the first rigid circuit board 1. Based on this, the routing difficulty of the power module 4 can be further reduced, and it is ensured that the power module 4 has sufficient routing width.

[0034] Specifically, the number of the first solder pads 64 and the number of the second solder pads 65 are the same, and the two are arranged in a one-to-one correspondence. The number is set according to actual applications, and the present invention does not impose any limitation on this.

[0035] In this embodiment, if Figure 1 As shown, the battery protection board also includes a temperature sensor 7, which is arranged on the second rigid circuit board 2 and is electrically connected to the control module 5. In practical applications, the battery protection board is connected to the battery cell, and the temperature sensor 7 can be used to monitor the temperature of the battery cell. The power module 4 generates a certain amount of heat due to the large current path when working. Therefore, the temperature sensor 7 is arranged on the second rigid circuit board 2, and is arranged separately from the power module 4, so as to avoid the temperature rise of the power module 4 affecting the monitoring accuracy of the temperature sensor 7.

[0036] The utility model also provides a battery. Specifically, the battery includes a battery cell and the battery protection board. The battery cell has a positive electrode ear and a negative electrode ear. As for the battery protection board, further, as Figure 1 and Figure 2As shown, the first rigid circuit board 1 has a first connection area 12, a second connection area 13 and a third connection area 14. One of the first connection area 12 and the second connection area 13 is connected to the positive ear, and the other is connected to the negative ear. The third connection area 14 is used to connect to the mainboard of the mobile terminal; wherein the third connection area 14, the first connection area 12, the control module 5, the second connection area 13, and the power module 4 are electrically connected in sequence, and the power module 4 is electrically connected to the third connection area 14. When the above-mentioned battery is applied to the mobile terminal, the third connection area 14 is connected to a connector with an FPC, and is connected to the mainboard of the mobile terminal through the connector. Based on this, when the mobile terminal is in use, the battery protection board can protect the battery cell from charging and discharging.

[0037] Furthermore, the power module 4 is located between the first connection area 12 and the second connection area 13, which can fully utilize the layout space on the first rigid circuit board 1, making the structure of the battery protection board more compact.

[0038] Furthermore, a positioning groove 22 is provided on the outer peripheral wall of the second rigid circuit board 2, and both ends of the positioning groove 22 along the thickness direction of the second rigid circuit board 2 are open ends. Based on the positioning groove 22, when the second rigid circuit board 2 is used on a mobile phone, the positioning groove 22 can cooperate with the positioning structure on the mobile terminal to enable the battery protection board to be stably arranged on the mobile terminal.

[0039] The utility model also provides a mobile terminal. Specifically, the mobile terminal includes the above-mentioned battery, wherein the mobile terminal can be a mobile terminal well known to those skilled in the art, such as a mobile phone, a notebook, a tablet computer, a POS machine, etc.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery protection board, characterized in that: The invention comprises a first rigid circuit board (1), a second rigid circuit board (2), a flexible circuit board (3), a power module (4), a control module (5) and a signal circuit (6), wherein the flexible circuit board (3) connects the first rigid circuit board (1) and the second rigid circuit board (2), the power module (4) is arranged on the first rigid circuit board (1), the control module (5) is arranged on the second rigid circuit board (2), and the signal circuit (6) connects the power module (4) and the control module (5).

2. The battery protection board according to claim 1, characterized in that: The signal line (6) comprises a first connecting section (61), a second connecting section (62) and a third connecting section (63) which are connected in sequence, wherein the first connecting section (61) is arranged on the first rigid circuit board (1) and is connected to the power module (4), the second connecting section (62) is arranged on the flexible circuit board (3), and the third connecting section (63) is arranged on the second rigid circuit board (2) and is connected to the control module (5).

3. The battery protection board according to claim 2, characterized in that: The first rigid circuit board (1) and the second rigid circuit board (2) are both long strip-shaped plate structures, and the flexible circuit board (3) connects one end of the first rigid circuit board (1) along its width direction and one end of the second rigid circuit board (2) along its width direction.

4. The battery protection board according to claim 3, characterized in that: One end of the flexible circuit board (3) connected to the first rigid circuit board (1) is at least partially oriented toward the power module (4).

5. The battery protection board according to claim 1, characterized in that: The signal line (6) comprises a first pad (64) and a second pad (65) connected to each other; The first rigid circuit board (1) and the second rigid circuit board (2) are arranged parallel to each other along a first direction (X); the first rigid circuit board (1) has a first connecting through hole (11) extending through the first direction (X); the power module (4) is arranged on the side of the first rigid circuit board (1) facing away from the second rigid circuit board (2); the first soldering pad (64) is arranged on the side of the first rigid circuit board facing the second rigid circuit board (2) and is connected to the power module (4) through the first connecting through hole (11); the second rigid circuit board (2) has a second connecting through hole (21) extending through the first direction (X); the control module (5) is arranged on the side of the second rigid circuit board (2) facing away from the first rigid circuit board (1); the second soldering pad (65) is arranged on the side of the second rigid circuit board (2) facing the first rigid circuit board (1) and is connected to the control module (5) through the second connecting through hole (21).

6. The battery protection board according to any one of claims 1 to 5, characterized in that: It also includes a temperature sensor (7), wherein the temperature sensor (7) is arranged on the second rigid circuit board (2), and the temperature sensor (7) is electrically connected to the control module (5).

7. A battery, characterized in that: Comprising a battery cell and a battery protection board as claimed in any one of claims 1 to 6, wherein the battery cell has a positive electrode ear and a negative electrode ear, the first rigid circuit board (1) has a first connection area (12), a second connection area (13) and a third connection area (14), one of the first connection area (12) and the second connection area (13) is connected to the positive electrode ear, and the other is connected to the negative electrode ear, and the third connection area (14) is used to connect to a mainboard of a mobile terminal; The third connection area (14), the first connection area (12), the control module (5), the second connection area (13), and the power module (4) are electrically connected in sequence, and the power module (4) is electrically connected to the third connection area (14).

8. The battery according to claim 7, characterized in that The power module (4) is located between the first connection area (12) and the second connection area (13).

9. The battery according to claim 7, characterized in that The outer peripheral wall of the second rigid circuit board (2) is provided with a positioning groove (22), and both ends of the positioning groove (22) along the thickness direction of the second rigid circuit board (2) are open ends.

10. A mobile terminal, characterized in that: Comprising a battery as described in any one of claims 7-9.

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