Battery protection board, battery and terminal device

Abstract

The present disclosure provides a battery protection plate, a battery and a terminal device. The battery protection plate comprises a first circuit board, a second circuit board and an electronic component, opposite sides of the electronic component are solderable sides, the electronic component is arranged between the first circuit board and the second circuit board, and the electronic component is electrically connected with the first circuit board and the second circuit board. The opposite sides of the electronic component are solderable sides, so that the upper and lower surfaces of the electronic component are wired at the same time, the effective conduction area of the electronic component is increased, the resistance value of the electronic component is reduced under the condition of the same volume, and the performance and integration of the electronic component are improved. By such arrangement, the space occupied by the electronic component on the battery protection plate can be reduced, thereby reducing the specification of the battery protection plate.

Description

Technical Field

[0001] This disclosure relates to the field of terminal equipment, and more particularly to a battery protection board, a battery, and a terminal device. Background Technology

[0002] The battery of a terminal device consists of a cell and a protection board. The tabs of the cell and the nickel sheets or nickel bricks of the protection board are soldered together. The battery protection circuit is located on the battery protection board. The protection devices of the battery protection circuit are located in two SIP modules, which are soldered onto an FPC (Flexible Printed Circuit). The male connector of the battery is located on the other side of the FPC, and the female connector is located on the main board of the device. The battery achieves electrical connection with the main board by engaging the connector. When the battery connector is engaged, the SIP module on the other side will also be located in the main board space. As the space utilization rate of current terminal devices is increasing, the excessively large SIP modules are gradually becoming a bottleneck in the space occupied by the main board, necessitating further reduction in the size of the SIP modules. Utility Model Content

[0003] This disclosure provides a battery protection board, battery, and terminal device that reduce the size of a SIP module.

[0004] In a first aspect, this disclosure provides a battery protection board, including a first circuit board, a second circuit board, and electronic components. The two sides of the electronic components are solderable sides. The electronic components are disposed between the first circuit board and the second circuit board and are electrically connected to the first circuit board and the second circuit board.

[0005] The two opposite sides of the electronic components are solderable, allowing for wiring on both the top and bottom surfaces. This increases the effective conductive area of ​​the components, reducing their resistance within the same volume and improving their performance and integration. This design also reduces the space occupied by the electronic components on the battery protection board, thus reducing the board's size.

[0006] Optionally, the electronic components include resistors and capacitors, which are electrically connected to the first circuit board.

[0007] Optionally, a flexible circuit board is included, which is connected to the side of the first circuit board away from the electronic component.

[0008] Optionally, a connecting post is included, which is located on the side of the electronic component near the first circuit board and the second circuit board. The connecting post supports the first circuit board and the second circuit board and is electrically connected to the first circuit board and the second circuit board.

[0009] Optionally, the connecting posts are disposed on both sides of the electronic component, and each side of the electronic component is connected to a plurality of the connecting posts.

[0010] Optionally, the first circuit board includes a first circuit board body, a first through hole, and a first blind hole. The first through hole is disposed through the first circuit board body, and the first blind hole is disposed on the side of the first circuit board body facing the device.

[0011] The second circuit board includes a second circuit board body, a second through hole and a second blind hole. The second through hole is disposed through the second circuit board body, and the second blind hole is disposed on the side of the second circuit board body opposite to the device.

[0012] The first through hole and the second through hole are positioned correspondingly, and the first blind hole and the second blind hole are positioned correspondingly.

[0013] Optionally, an injection molding layer is included, which is disposed between the first circuit board and the second circuit board, and the injection molding layer surrounds the electronic component.

[0014] Optionally, it also includes an IC, which is stitched or surface-mounted to the leads of the first circuit board, and the size of the IC is smaller than the size of the electronic component in the thickness direction of the first circuit board.

[0015] In a second aspect, this disclosure provides a battery comprising a cell, a connector, and a battery protection board as described in the first aspect; the battery protection board connects the cell and the connector.

[0016] Thirdly, this disclosure provides a terminal device, the terminal device including the battery as described in the second aspect. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0018] Figure 1 The diagram shown is a cross-sectional view of one embodiment of the battery protection board disclosed herein.

[0019] Figure 2 The diagram shown is a cross-sectional view of another embodiment of the battery protection board disclosed herein.

[0020] Figure 3 As shown Figure 1 The diagram shows a three-dimensional representation of the battery protection board.

[0021] Figure 4 The diagram shown is a schematic representation of one embodiment of the battery disclosed herein.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. Battery protection board; 10. First circuit board; 11. First circuit board body; 12. First through hole; 13. First blind hole; 20. Second circuit board; 21. Second circuit board body; 22. Second through hole; 23. Second blind hole; 30. Electronic components; 31. Transistor module; 32. Resistor; 33. RC; 40. Flexible circuit board; 50. Connecting post; 60. Injection molding layer; 70. IC; 200. Battery; 210. Connector; 220. Battery cell. Detailed Implementation

[0024] The technical solutions in the embodiments (or "implementations") of this disclosure will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0025] If this disclosure uses terms relating to directional indications or positional relationships (e.g., up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, terms such as "first" and "second" in this disclosure are used only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0026] This disclosure provides a battery protection board, a battery, and a terminal device. The battery protection board, battery, and terminal device of this disclosure will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0027] In related technologies, battery protection boards mainly consist of a power circuit, a protection unit, and a power detection unit. The power circuit consists of a battery cell, precision resistors Rs1 and Rs2, and transistors Q1, Q2, Q3, and Q4. The protection unit consists of two lithium protection ICs and their peripheral resistors and capacitors, which control the conduction and disconnection of transistors Q1, Q2, Q3, and Q4 to achieve overcharge and over-discharge protection and overcurrent protection during charging and discharging. The power detection unit consists of a fuel gauge and its peripheral resistors and capacitors, which calculate the power by detecting the voltage of the precision resistors and the voltage of the battery cell.

[0028] See Figure 1 and Figure 2As shown, this disclosure provides a battery protection board 100. The battery protection board 100 includes a first circuit board 10, a second circuit board 20, and electronic components 30. The two opposite sides of the electronic components 30 are solderable sides, and the electronic components 30 are disposed between the first circuit board 10 and the second circuit board 20 and electrically connected to the first circuit board 10 and the second circuit board 20.

[0029] The two opposite sides of the electronic component 30 are solderable, allowing wiring to be done on both the top and bottom surfaces of the electronic component 30 simultaneously. This increases the effective conductive area of ​​the electronic component 30, reduces its resistance while maintaining the same volume, and improves its performance and integration. This design reduces the space occupied by the electronic component 30 on the battery protection board 100, thereby reducing the size of the battery protection board 100.

[0030] In this embodiment, the electronic component 30 can be a transistor module 31. The transistor module 31 is disposed between the first circuit board 10 and the second circuit board 20, and is electrically connected to the first circuit board 10 and the second circuit board 20. In some embodiments, the transistor module 31 is in the form of a bare wafer. The source and drain of the transistor module 31 are wired simultaneously on the upper and lower surfaces of the transistor module 31, increasing the effective conduction area of ​​the transistor module 31, reducing the resistance of the transistor module 31 with the same volume, and improving the performance and integration of the transistor module 31. The transistor module 31 integrates multiple transistors, replacing multiple independently set transistors in related technologies, reducing the number of transistor modules 31. This arrangement can reduce the space occupied by the transistor module 31 on the battery protection board 100, thereby reducing the size of the battery protection board 100.

[0031] In an optional embodiment, see Figure 1 and Figure 2 As shown, the electronic component 30 includes a resistor 32 and a capacitor 33, which are electrically connected to the first circuit board 10 respectively.

[0032] This simplifies the layout of electronic components 30 and reduces the wiring between the first circuit board 10 and the second circuit board 20.

[0033] In an optional embodiment, see Figure 1 and Figure 2 As shown, the battery protection board 100 also includes a flexible circuit board 40. The flexible circuit board 40 is connected to the side of the first circuit board 10 away from the electronic components 30.

[0034] Thus, by electrically connecting the electronic component 30 to the first circuit board 10, the wiring layout between the electronic component 30, the first circuit board 10, and the flexible circuit board 40 is simplified.

[0035] In an optional embodiment, see Figure 1 and Figure 2 As shown, the battery protection board 100 includes a connecting post 50. The connecting post 50 is located on the side of the electronic component 30 near the first circuit board 10 and the second circuit board 20. The connecting post 50 supports the first circuit board 10 and the second circuit board 20 and is electrically connected to the first circuit board 10 and the second circuit board 20.

[0036] The connecting post 50 enables the circuit connection between the first circuit board 10 and the second circuit board 20, while also supporting the first and second circuit boards 20, thereby improving the overall support and mechanical reliability of the battery protection board 100.

[0037] In an optional embodiment, see Figure 1 and Figure 2 As shown, the connecting posts 50 are disposed on both sides of the electronic component 30, and multiple connecting posts 50 are connected to each side of the electronic component 30.

[0038] The electronic components 30 are centrally located in the middle of the battery protection board 100, and the connecting posts 50 are located on both sides of the electronic components 30. This avoids interference between the connecting posts 50 and the electronic components 30 and simplifies the layout of the electronic components 30. By providing multiple connecting posts 50 on each side of the electronic components 30, the overall support and mechanical reliability of the battery protection board 100 are improved.

[0039] In an optional embodiment, see Figure 1 and Figure 2 As shown, the first circuit board 10 includes a first circuit board body 11, a first through hole 12, and a first blind hole 13. The first through hole 12 is disposed through the first circuit board body 11, and the first blind hole 13 is disposed on the side of the first circuit board body 11 facing the device. The second circuit board 20 includes a second circuit board body 21, a second through hole 22, and a second blind hole 23. The second through hole 22 is disposed through the second circuit board body 21, and the second blind hole 23 is disposed on the side of the second circuit board body 21 away from the device. The positions of the first through hole 12 and the second through hole 22 correspond to each other, and the positions of the first blind hole 13 and the second blind hole 23 also correspond to each other.

[0040] This configuration facilitates the alignment of the first circuit board 10 and the second circuit board 20 during the electrical connection with the electronic component 30, which is beneficial for the welding between the electronic component 30 and the first circuit board 10 and the second circuit board 20, and also improves the mechanical strength and stability of the battery protection board 100.

[0041] In an optional embodiment, see Figure 1 and Figure 2 As shown, the battery protection board 100 also includes an injection molding layer 60, which is disposed between the first circuit board 10 and the second circuit board 20, and surrounds the electronic components 30.

[0042] Specifically, when there is a gap between the electronic component 30 and the second circuit board 20, the injection molding layer 60 fills the gap between the electronic component 30 and the second circuit board 20. Additionally, the injection molding layer 60 also fills the gap between the electronic component 30 and the electronic component 20. This provides support between the first circuit board 10 and the second circuit board 20, and provides isolation and protection between the electronic components 30, thus improving the mechanical reliability of the battery protection board 100.

[0043] In an optional embodiment, see Figure 1 and Figure 2 As shown, the battery protection board 100 also includes an IC 70. The IC 70 is connected to the first circuit board 10 via wire stitching or surface mount. In the thickness direction of the first circuit board 10, the size of the IC 70 is smaller than the size of the electronic component 30. Furthermore, the size of the IC 70 is smaller than the size of the transistor module 31.

[0044] In this way, the thickness of IC70 is reduced by the packaging method, thereby achieving the thinning of IC70. This allows the two sides of the electronic component 30 to be electrically connected to the first circuit board 10 and the second circuit board 20 respectively, without being interfered with by IC70.

[0045] In an optional embodiment, the first circuit board 10 and the second circuit board 20 are laminated and thinned relative to the existing circuit boards, thereby reducing the overall thickness of the battery protection board 100.

[0046] In this way, by reducing the overall thickness of the battery protection board 100, the space utilization rate inside the terminal device is improved.

[0047] This disclosure also provides a battery 200. See also Figure 3 and Figure 4 As shown. Battery 200 includes cell 220, connector 210 and battery protection board 100; battery protection board 100 connects cell 220 and connector 210.

[0048] For details, see Figure 3 As shown, the flexible circuit board 40 of the battery protection board 100 is electrically connected to the battery cell 220. Thus, the flexible circuit board 40 has two extensions 41 extending outward from the edge of the battery cell 220, and the first circuit board 10, the second circuit board 20 and the electronic components 30 are respectively disposed in the two extensions 41.

[0049] This configuration reduces the space occupied by electronic components 30 on the battery protection board 100, thereby reducing the battery size.

[0050] This disclosure also provides a terminal device including a battery 200. This arrangement reduces the space occupied by the electronic components 30 on the battery protection board 100, thereby reducing the size of the battery 200. When the battery 200 is electrically connected to the motherboard of the terminal device, the space occupied by the battery 200 on the motherboard is reduced, thereby improving the internal space utilization of the terminal device.

[0051] It should be noted that the technical solutions or features described in the above embodiments can be combined or complemented by each other without conflict. The scope of protection of this disclosure is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A battery protection board, characterized in that, It includes a first circuit board, a second circuit board, and electronic components. The two sides of the electronic components are solderable sides. The electronic components are disposed between the first circuit board and the second circuit board and are electrically connected to the first circuit board and the second circuit board.

2. The battery protection board according to claim 1, characterized in that, The electronic components include resistors and capacitors, which are electrically connected to the first circuit board.

3. The battery protection board according to claim 2, characterized in that, It includes a flexible circuit board, which is connected to the side of the first circuit board away from the electronic component.

4. The battery protection board according to claim 1, characterized in that, The device includes a connecting post, which is located on the side of the electronic component near the first circuit board and the second circuit board. The connecting post supports the first circuit board and the second circuit board and is electrically connected to the first circuit board and the second circuit board.

5. The battery protection board according to claim 4, characterized in that, The connecting posts are disposed on both sides of the electronic component, and each side of the electronic component is connected to a plurality of the connecting posts.

6. The battery protection board according to claim 1, characterized in that, The first circuit board includes a first circuit board body, a first through hole, and a first blind hole. The first through hole is disposed through the first circuit board body, and the first blind hole is disposed on the side of the first circuit board body facing the device. The second circuit board includes a second circuit board body, a second through hole and a second blind hole. The second through hole is disposed through the second circuit board body, and the second blind hole is disposed on the side of the second circuit board body opposite to the device. The positions of the first through hole and the second through hole correspond to each other, and the positions of the first blind hole and the second blind hole correspond to each other.

7. The battery protection board according to claim 1, characterized in that, It includes an injection molding layer disposed between the first circuit board and the second circuit board, the injection molding layer surrounding the electronic component.

8. The battery protection board according to claim 1, characterized in that, It also includes an IC, which is connected to the leads of the first circuit board by stitching or surface mount electronic components. In the thickness direction of the first circuit board, the size of the IC is smaller than the size of the electronic components.

9. A battery, characterized in that, The battery includes a cell, a connector, and a battery protection board as described in any one of claims 1-8; The battery protection board connects the battery cell and the connector.

10. A terminal device, characterized in that, The terminal device includes the battery as described in claim 9.

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