Battery protection board, battery assembly and terminal equipment

Abstract

The utility model discloses a battery protection board, battery pack and terminal equipment, battery protection board includes PCB board and FPC board, PCB board includes first, third and fifth electrical connection portion, the current polarity of first electrical connection portion is one of positive polarity and negative polarity, and the third and fifth electrical connection portion is the other one of positive polarity and negative polarity. The FPC board comprises a second electric connection part, a fourth electric connection part, a sixth electric connection part, a first output part and a second output part, the second electric connection part is electrically connected with the first electric connection part, and the second electric connection part is electrically connected with the first output part and the second output part; the fourth electric connection part is electrically connected with the third electric connection part, the sixth electric connection part is electrically connected with the fifth electric connection part, and the fourth electric connection part and the sixth electric connection part are electrically connected with at least one of the first output part and the second output part. One of the positive current and the negative current is a single branch line flow path on the PCB, so that the length of the total flow path of the positive current and the negative current on the PCB is reduced, the heat generated by the current on the PCB is less, and the risk of over-high temperature rise is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, and particularly relates to a battery protection board, a battery assembly and a terminal device. Background Art

[0002] A mobile phone battery is generally provided with a protection board, which includes a PCB board (Printed Circuit Board) and an FPC board (Flexible Printed Circuit) respectively connected to both ends of the PCB board. Each FPC board has external terminals for electrical connection with the battery. The existing protection board can output positive and negative polarity currents through the FPC boards at both ends thereof. However, the total flow path of the two polarities of currents flowing through the PCB board is relatively long, which will cause the PCB board to generate more heat and have a risk of excessive temperature rise. Summary of the Utility Model

[0003] A series of simplified concepts are introduced in the summary part of the utility model, which will be further described in detail in the detailed implementation part. The summary part of the utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0004] To at least partially solve the above problems, the utility model provides a battery protection board, which includes:

[0005] A PCB board, which includes a first electrical connection part, a third electrical connection part and a fifth electrical connection part arranged at intervals. The current polarity of the first electrical connection part is one of positive polarity and negative polarity, and the current polarities of the third electrical connection part and the fifth electrical connection part are the same and are the other of positive polarity and negative polarity; and

[0006] An FPC board, which includes a second electrical connection part, a fourth electrical connection part, a sixth electrical connection part, a first output part and a second output part arranged at intervals. The second electrical connection part is electrically connected to the first electrical connection part, and the second electrical connection part is electrically connected to both the first output part and the second output part; the fourth electrical connection part is electrically connected to the third electrical connection part, the sixth electrical connection part is electrically connected to the fifth electrical connection part, the fourth electrical connection part is electrically connected to at least one of the first output part and the second output part, and the sixth electrical connection part is electrically connected to at least the other of the first output part and the second output part.

[0007] Optionally, the fourth electrical connection part is electrically connected to the first output part, and the sixth electrical connection part is electrically connected to the second output part.

[0008] Optionally, the fourth electrical connection portion is located between the first output portion and the sixth electrical connection portion; and / or the sixth electrical connection portion is located between the fourth electrical connection portion and the second output portion.

[0009] Optionally, the fourth electrical connection portion is closer to the first output portion than the second output portion; and / or the sixth electrical connection portion is closer to the second output portion than the first output portion.

[0010] Optionally, the first output portion, the second electrical connection portion, the fourth electrical connection portion, the sixth electrical connection portion, and the second output portion are arranged at intervals along a first direction.

[0011] Optionally, the first electrical connection portion, the second electrical connection portion, the third electrical connection portion, the fourth electrical connection portion, the fifth electrical connection portion, and the sixth electrical connection portion are all composed of pads.

[0012] Optionally, the first electrical connection portion and the third electrical connection portion are both located at a first end of the PCB board in the first direction, the fifth electrical connection portion is located at a second end of the PCB board opposite to the first end; the first output portion and the second output portion are respectively located at two ends of the FPC board in the first direction.

[0013] Optionally, a battery positive electrode electrical connection portion and a battery negative electrode electrical connection portion are provided on a side of the PCB board facing away from the FPC board, and the first electrical connection portion is closer to the one with the same current polarity among the battery positive electrode electrical connection portion and the battery negative electrode electrical connection portion.

[0014] Optionally, multiple layers of conductors are provided inside the PCB board, the PCB board includes a first overcurrent area and a second overcurrent area, the first electrical connection portion and the third electrical connection portion are located in the first overcurrent area, the fifth electrical connection portion is located in the second overcurrent area, and the multiple layers of conductors have the same current polarity at the second overcurrent area.

[0015] Optionally, electrical components are provided on a side of the PCB board facing away from the FPC board and / or on the other side facing the FPC board, and the current polarity of the electrical components is the same as that of the fifth electrical connection portion.

[0016] Optionally, the FPC board is stacked with the PCB board in the thickness direction.

[0017] Optionally, the FPC board extends beyond two ends of the PCB board in the first direction.

[0018] Optionally, both the first output part and the second output part are provided with output terminals for outputting positive-polarity current and negative-polarity current.

[0019] According to another aspect of the present invention, there is provided a battery assembly, which includes a battery and the battery protection board according to any of the above aspects, and the battery is electrically connected to the PCB board.

[0020] According to still another aspect of the present invention, there is provided a terminal device, which includes the battery assembly according to any of the above aspects.

[0021] For the battery protection board, battery assembly and terminal device according to the present invention, the battery protection board uses a single large-sized FPC board to split and output the positive-polarity current and negative-polarity current of the PCB board from two output parts of the battery protection board. One of the positive-polarity current and negative-polarity current flows in a single branch line on the PCB board, and flows and outputs in a double-branch line on the FPC board. The other of the positive-polarity current and negative-polarity current flows in a double-branch line on the PCB board, and flows and outputs in at least a double-branch line on the FPC board. Since one of the positive-polarity current and negative-polarity current is a single-branch line flow path on the PCB board, the total flow path length of the positive-polarity current and negative-polarity current on the PCB board is reduced, and the heat generated by the current on the PCB board is less, avoiding the risk of excessive temperature rise. Description of the Drawings

[0022] The following drawings of the present invention are used as a part of the present invention to understand the present invention. The embodiments and descriptions of the present invention shown in the drawings are used to explain the principles of the present invention.

[0023] In the drawings:

[0024] Figure 1 is the front view of the battery protection board according to the first embodiment of the present invention;

[0025] Figure 2 is Figure 1 the rear view of the battery protection board shown in

[0026] Figure 3 is Figure 1 the front view of the PCB board shown in

[0027] Figure 4 is Figure 1 the rear view of the PCB board shown in

[0028] Figure 5 is Figure 1 the rear view of the FPC board shown in

[0029] Figure 6Front view of the battery protection board according to the second embodiment of the present utility model;

[0030] Figure 7 is Figure 6 rear view of the battery protection board shown in;

[0031] Figure 8 is Figure 6 front view of the PCB board shown in;

[0032] Figure 9 is Figure 6 rear view of the PCB board shown in;

[0033] Figure 10 is Figure 6 rear view of the FPC board shown in.

[0034] Explanation of reference numerals:

[0035] 1 / 2: Battery protection board

[0036] 10: PCB board

[0037] 11: First end

[0038] 12: Second end

[0039] 13: Battery positive electrode electrical connection part

[0040] 14: Battery negative electrode electrical connection part

[0041] 15: First electrical connection part

[0042] 16: Third electrical connection part

[0043] 17: Fifth electrical connection part

[0044] 20: FPC board

[0045] 21: Second electrical connection part

[0046] 22: Fourth electrical connection part

[0047] 23: Sixth electrical connection part

[0048] 24: First output part

[0049] 25: Second output part

[0050] 30: Electrical components

[0051] D1: First direction

[0052] D2: Second direction

[0053] R1: First overcurrent area

[0054] R2: Second overcurrent region Detailed implementation manners

[0055] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0056] In order to thoroughly understand the present utility model, a detailed description will be presented in the following. Obviously, the implementation of the embodiments of the present utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present utility model are described in detail as follows. However, in addition to these detailed descriptions, the present utility model can also have other embodiments.

[0057] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0058] The ordinal numbers such as "first" and "second" cited in the present utility model are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0059] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are only for illustrative purposes and are not restrictive.

[0060] Now, the exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present utility model is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art.

[0061] The present utility model provides a battery protection board which can be mounted to a battery to provide protection for the battery and prevent problems such as overcharging, over-discharging, over-current, and short circuit of the battery. The battery equipped with the battery protection board can be applied to various terminal devices, such as mobile phones.

[0062] The first embodiment

[0063] Figures 1 to 5 Schematically shows a battery protection board 1 according to the first embodiment of the present utility model. Exemplarily, the battery protection board 1 can be strip-shaped. As Figure 1 and Figure 2 shown, the battery protection board 1 includes a PCB board 10 and an FPC board 20. The battery protection board 1 has a first direction D1, a second direction D2, and a thickness direction that are perpendicular to each other. The PCB board 10 includes a plurality of electrical connection portions for electrically connecting to the FPC board 20. The FPC board 20 includes a plurality of electrical connection portions that are respectively electrically connected to the plurality of electrical connection portions on the PCB board 10. The FPC board 20 is stacked with the PCB board 10 in the thickness direction.

[0064] In the illustrated embodiment, the first direction D1 is the length direction of the battery protection board 1, and the second direction D2 is the width direction of the battery protection board 1.

[0065] As Figure 1 and Figure 3 shown, the PCB board 10 has a battery positive electrode connection portion (B+) 13 and a battery negative electrode connection portion (B-) 14 on the side facing away from the FPC board 20. The battery positive electrode connection portion (B+) 13 is used to connect to the positive electrode of the battery, and the battery negative electrode connection portion (B-) 14 is used to connect to the negative electrode of the battery. For example, the positive electrode plate of the battery is welded to the battery positive electrode connection portion (B+) 13, and the negative electrode plate of the battery is welded to the battery negative electrode connection portion (B-) 14. The battery positive electrode connection portion (B+) 13 is spaced apart from the battery negative electrode connection portion (B-) 14 in the first direction D1.

[0066] Optionally, both the battery positive electrode connection portion (B+) 13 and the battery negative electrode connection portion (B-) 14 are formed by pads.

[0067] Optionally, the PCB board 10 is a single-sided board, and electrical components 30 can be provided on the side of the PCB board 10 facing away from the FPC board 20. Alternatively, the PCB board 10 is a double-sided board, and electrical components 30 can be provided on both the side of the PCB board 10 facing away from the FPC board 20 and the side facing the FPC board 20. The electrical components 30 can be located between the battery positive electrode connection portion (B+) 13 and the battery negative electrode connection portion (B-) 14, or can be located on one side of the battery positive electrode connection portion (B+) 13 and / or the battery negative electrode connection portion (B-) 14.

[0068] As Figure 2 and Figure 5 shown, the PCB board 10 includes a first electrical connection portion 15, a third electrical connection portion 16, and a fifth electrical connection portion 17 that are arranged at intervals. Exemplarily, the first electrical connection portion 15, the third electrical connection portion 16, and the fifth electrical connection portion 17 are arranged at intervals along the first direction D1, so as to be more suitable for a battery protection board that is elongated in the first direction D1. The current polarity of the first electrical connection portion 15 is one of a positive polarity and a negative polarity. The current polarities of both the third electrical connection portion 16 and the fifth electrical connection portion 17 are the same and are the other of the positive polarity and the negative polarity.

[0069] The FPC board 20 includes a second electrical connection portion 21, a fourth electrical connection portion 22, a sixth electrical connection portion 23, a first output portion 24, and a second output portion 25 that are arranged at intervals. Exemplarily, the second electrical connection portion 21, the fourth electrical connection portion 22, the sixth electrical connection portion 23, the first output portion 24, and the second output portion 25 are arranged at intervals along the first direction D1, so as to be more suitable for a battery protection board that is elongated in the first direction D1. The second electrical connection portion 21 is electrically connected to the first electrical connection portion 15, so the current polarities of both are the same. The fourth electrical connection portion 22 is electrically connected to the third electrical connection portion 16, so the current polarities of both are the same. The sixth electrical connection portion 23 is electrically connected to the fifth electrical connection portion 17, so the current polarities of both are the same.

[0070] Optionally, the first electrical connection portion 15, the second electrical connection portion 21, the third electrical connection portion 16, the fourth electrical connection portion 22, the fifth electrical connection portion 17, and the sixth electrical connection portion 23 are all composed of pads.

[0071] The second electrical connection portion 21 is electrically connected to both the first output portion 24 and the second output portion 25 to output a current of one polarity from the two output portions. The fourth electrical connection portion 22 is electrically connected to at least one of the first output portion 24 and the second output portion 25 to output a current of the other polarity from at least one output portion; the sixth electrical connection portion 23 is electrically connected to at least one of the first output portion 24 and the second output portion 25 to output a current of the other polarity from at least one output portion.

[0072] Taking the illustrated embodiment as an example, the current polarity of the first electrical connection portion 15 is a positive polarity. The current polarities of both the third electrical connection portion 16 and the fifth electrical connection portion 17 are negative polarities. In other words, the first electrical connection portion 15 is used for carrying a positive-polarity current, and the third electrical connection portion 16 and the fifth electrical connection portion 17 are used for carrying a negative-polarity current. Thus, the positive-polarity current can flow to the FPC board 20 via the second electrical connection portion 21 and be output from the first output portion 24 and the second output portion 25; the negative-polarity current is output from the first output portion 24 and the second output portion 25 via the fourth electrical connection portion 22 and the sixth electrical connection portion 23.

[0073] According to this embodiment, a single-attribute current (e.g., a positive-polarity current) flows on the PCB board 10 in a single branch line and flows between the PCB board 10 and the FPC board 20 via the first electrical connection portion 15 and the second electrical connection portion 21, and flows on the FPC board 20 in a double branch line between the second electrical connection portion 21 and the first output portion 24 and between the second electrical connection portion 21 and the second output portion 25. Another single-attribute current (e.g., a negative-polarity current) flows on the PCB board 10 in a double branch line and flows between the PCB board 10 and the FPC board 20 via the third electrical connection portion 16 and the fourth electrical connection portion 22, the fifth electrical connection portion 17 and the sixth electrical connection portion 23, and flows on the FPC board 20 in at least a double branch line between the fourth electrical connection portion 22 and the first output portion 24 and / or the second output portion 25, and between the sixth electrical connection portion 23 and the first output portion 24 and / or the second output portion 25.

[0074] For the illustrated embodiment, the positive-polarity current flows on the PCB board 10 in a single branch line, flows on the FPC board 20 in a double branch line and is output; the negative-polarity current flows on the PCB board 10 in a double branch line, flows on the FPC board 20 in at least a double branch line and is output.

[0075] Since the above-mentioned single-attribute current (i.e., the positive-polarity current) has a single branch line flow path on the PCB board 10, the total length of the flow paths of the positive-polarity current and the negative-polarity current on the PCB board 10 is reduced, the heat generated by the current on the PCB board 10 is less, and the risk of excessive temperature rise is avoided.

[0076] The fourth electrical connection portion 22 is electrically connected to the first output portion 24 and not electrically connected to the second output portion; the sixth electrical connection portion 23 is electrically connected to the second output portion and not electrically connected to the first output portion 24. Thus, the above-mentioned another single-attribute current flows on the FPC board 20 in a double branch line between the fourth electrical connection portion 22 and the first output portion 24, and between the sixth electrical connection portion 23 and the second output portion 25. This can simplify the wiring inside the FPC board 20.

[0077] The fourth electrical connection portion 22 is located between the first output portion 24 and the sixth electrical connection portion 23; compared with the second output portion 25, the fourth electrical connection portion 22 is closer to the first output portion 24. In this way, the current flow path between the fourth electrical connection portion 22 and the first output portion 24 can be shorter. The sixth electrical connection portion 23 is located between the fourth electrical connection portion 22 and the second output portion 25. Compared with the first output portion 24, the sixth electrical connection portion 23 is closer to the second output portion 25. In this way, the current flow path between the sixth electrical connection portion 23 and the second output portion 25 can be shorter. The second electrical connection portion 21 is provided near the fourth electrical connection portion 22. Alternatively, the second electrical connection portion 21 is provided near the sixth electrical connection portion 23.

[0078] The first electrical connection portion 15 and the third electrical connection portion 16 are both located at the first end 11 of the PCB board 10 in the first direction D1, and the fifth electrical connection portion 17 is located at the second end 12 of the PCB board 10 opposite to the first end 11. The first output portion 24 and the second output portion 25 are respectively located at both ends of the FPC board 20 in the first direction D1. With such an arrangement, the FPC board 20 extends at least between the first end 11 and the second end 12. A single FPC board 20 can at least cover the portion of the PCB board 10 between the first end 11 and the second end 12.

[0079] The first electrical connection portion 15 is closer to the one of the battery positive electrode connection portion (B+) 13 and the battery negative electrode connection portion (B-) 14 with the same current polarity. If the first electrical connection portion 15 has the same current polarity as the battery positive electrode connection portion (B+) 13, the first electrical connection portion 15 is closer to the battery positive electrode connection portion (B+) 13. Specifically, the distance from the first electrical connection portion 15 to the battery positive electrode connection portion (B+) 13 is less than the distance from the first electrical connection portion 15 to the battery negative electrode connection portion (B-) 14.

[0080] In the illustrated embodiment, the battery positive electrode connection portion (B+) 13 is located between the first end 11 and the battery negative electrode connection portion (B-) 14, and the battery negative electrode connection portion (B-) 14 is located between the second end 12 and the battery positive electrode connection portion (B+) 13, so that the battery positive electrode connection portion (B+) 13 is closer to the first end 11 than the battery negative electrode connection portion (B-) 14. The first electrical connection portion 15 conducts positive-polarity current, so the first electrical connection portion 15 is arranged at the first end 11 to be closer to the battery positive electrode connection portion (B+) 13.

[0081] By arranging the first electrical connection portion 15 close to the battery electrical connection portion with the same current polarity, the current flow path between the first electrical connection portion 15 and the battery electrical connection portion with the same current polarity is short, so that the length of the single-line flow path on the PCB board 10 can be reduced, and the total flow path length of both the positive-polarity current and the negative-polarity current on the PCB board 10 is further reduced, thereby further reducing the heat generated by the current on the PCB board 10. And the short current flow path can also avoid the situation where the main circuit current with positive and negative polarities passes through the same position, which is beneficial to reducing the total number of layers and the total thickness of the PCB, and reducing the material cost and production cost of the PCB.

[0082] The PCB board 10 is a multi-layer structure. Specifically, a plurality of layers of conductors (not shown) are provided inside the PCB board 10, and the conductors can be, for example, copper conductors formed by copper foils. These multi-layers of conductors are stacked in the thickness direction. The PCB board 10 includes a first overcurrent region R1 and a second overcurrent region R2 distributed in the first direction D1. Figure 3 and Figure 4The approximate positions of the two regions are shown by dashed boxes. The first electrical connection part 15 and the third electrical connection part 16 are located within the first overcurrent region R1. The fifth electrical connection part 17 is located within the second overcurrent region R2.

[0083] The multi-layer conductors have the same current polarity at the second overcurrent region R2, and this current polarity is the same as that of the fifth electrical connection part 17. The multi-layer conductors may not pass the main circuit current with positive and negative polarity attributes at the same position, so there is no need to sandwich an inner layer without attributes or only signal lines between adjacent conductors, thus improving the space utilization rate of the multi-layer conductors and reducing the cost of the PCB board 10.

[0084] For the illustrated embodiment, the battery positive electrode electrical connection part (B+) 13, the first electrical connection part 15, and the third electrical connection part 16 are located within the first overcurrent region R1, and the battery negative electrode electrical connection part (B-) 14 and the fifth electrical connection part 17 are located within the second overcurrent region R2. The multi-layer conductors at the second overcurrent region R2 have the same negative-polarity current.

[0085] The current polarity of the electrical component 30 is the same as that of the fifth electrical connection part 17. One of the battery positive electrode electrical connection part (B+) 13 and the battery negative electrode electrical connection part (B-) 14 has the same current polarity as the fifth electrical connection part 17, and the electrical component 30 is located near the said one of the battery positive electrode electrical connection part (B+) 13 and the battery negative electrode electrical connection part (B-) 14. For the illustrated embodiment, the current polarity of the electrical component 30 is the same as that of the fifth electrical connection part 17. The electrical component 30 is located near the battery negative electrode electrical connection part (B-) 14. Optionally, the electrical component 30 is located near both sides of the battery negative electrode electrical connection part (B-) 14 in the first direction D1.

[0086] Return to refer to Figure 1 , the FPC board 20 extends beyond the first end 11 and the second end 12 in the first direction D1. For the illustrated embodiment, the length of the FPC board 20 is greater than the length of the PCB board 10. As Figure 5 shown, both the first output part 24 and the second output part 25 are provided with output terminals (not shown) for outputting positive-polarity current and negative-polarity current.

[0087] For the battery protection board 1 of the illustrated first embodiment, the positive-polarity current flows in from the output terminals at both ends of the FPC board 20, converges to the same second electrical connection part 21, and then flows into the PCB board 10 via the first electrical connection part 15, and reaches the battery positive electrical connection part (B+) 13. The negative-polarity current flows from the battery negative electrical connection part (B-) 14 through the electrical component 30, and then branches to the third electrical connection part 16 and the fifth electrical connection part 17 at both ends of the PCB board 10, flows into the FPC board 20 via the fourth electrical connection part 22 and the sixth electrical connection part 23, and flows out from the output terminals at both ends of the FPC board 20.

[0088] Second embodiment

[0089] Figures 6 to 10 The battery protection board 2 according to the second embodiment of the present invention is schematically shown. Except for the current polarity of the electrical connection parts, the battery protection board 2 of the second embodiment has the same structure and / or configuration as the battery protection board 1 of the first embodiment. Therefore, the elements having substantially the same functions as those in the first embodiment will be numbered the same here, and for the sake of brevity, they will not be described and / or illustrated in detail again.

[0090] As Figure 7 and Figure 10 shown, the current polarity of the first electrical connection part 15 is negative-polarity. The current polarities of both the third electrical connection part 16 and the fifth electrical connection part 17 are positive-polarity. The first electrical connection part 15 is used for the negative-polarity current to flow; the third electrical connection part 16 and the fifth electrical connection part 17 are used for the positive-polarity current to flow. Thus, the positive-polarity current flows in a double-branch line on the PCB board 10, flows in a double-branch line on the FPC board 20 and is output; the negative-polarity current flows in a single-branch line on the PCB board 10, flows in a double-branch line on the FPC board 20 and is output.

[0091] As Figure 6 and Figure 8 shown, the battery positive electrical connection part (B+) 13 is located between the battery negative electrical connection part (B-) 14 and the second end 12, and the battery negative electrical connection part (B-) 14 is located between the first end 11 and the battery positive electrical connection part (B+) 13. This makes the battery negative electrical connection part (B-) 14 closer to the first end 11 than the battery positive electrical connection part (B+) 13. Since the first electrical connection part 15 conducts the negative-polarity current, the first electrical connection part 15 is arranged at the first end 11 to be closer to the battery negative electrical connection part (B-) 14.

[0092] As Figure 8 and Figure 9As shown, the battery negative electrode electrical connection part (B-) 14, the first electrical connection part 15, and the third electrical connection part 16 are located within the first overcurrent region R1, and the battery positive electrode electrical connection part (B+) 13 and the fifth electrical connection part 17 are located within the second overcurrent region R2. The multilayer conductors at the second overcurrent region R2 have the same positive-polarity current.

[0093] The current polarity of the electrical component 30 is the same as that of the fifth electrical connection part 17. The electrical component 30 is located near the battery positive electrode electrical connection part (B+) 13. Optionally, the electrical component 30 is located near both sides of the battery positive electrode electrical connection part (B+) 13 in the first direction D1.

[0094] For the battery protection board 2 of the illustrated second embodiment, the positive-polarity current flows in from the output terminals at both ends of the FPC board 20, respectively flowing to the fourth electrical connection part 22 and the sixth electrical connection part 23, flowing into the PCB board 10 via the third electrical connection part 16 and the fifth electrical connection part 17 at both ends of the PCB board 10, and converging to the battery positive electrode electrical connection part (B+) 13. The negative-polarity current flows from the battery negative electrode electrical connection part (B-) 14 through the electrical component 30, and then flows to the first electrical connection part 15 at one end of the PCB board 10, flowing into the FPC board 20 via the same second electrical connection part 21, and splitting to the output terminals at both ends of the FPC board 20 and flowing out.

[0095] Optionally, corresponding signal electrical connection parts can be led out according to the signal lines that need to be led out from the battery protection board. The length and width of the output FPC of the new scheme can be determined according to the FPC size and PCB size of the existing two-end FPC board output scheme in the background art. The copper thickness required for the FPC and the total thickness of the FPC are determined according to the maximum overcurrent requirement.

[0096] According to another aspect of the present invention, there is provided a battery assembly, which includes the battery protection board according to any of the above aspects, and the battery is electrically connected to the PCB board of the battery protection board.

[0097] According to still another aspect of the present invention, there is provided a terminal device, which includes a battery assembly provided with the battery protection board according to any of the above aspects. The terminal device is, for example, a mobile phone.

[0098] According to the present invention, one of the positive-polarity current and the negative-polarity current flows in a single branch line on the PCB board 10, and flows in a double branch line on the FPC board 20 and is output. The other of the positive-polarity current and the negative-polarity current flows in a double branch line on the PCB board 10, and flows in at least a double branch line on the FPC board 20 and is output. Since one of the positive-polarity current and the negative-polarity current is a single branch line flow path on the PCB board 10, the total flow path length of the positive-polarity current and the negative-polarity current on the PCB board 10 is reduced, the heat generated by the current on the PCB board 10 is less, and the risk of excessive temperature rise is avoided.

[0099] In the present utility model, a part of the current flow path originally provided on the PCB board 10 is distributed to the FPC board 20, so that the heat generated by the current is shared from the PCB board 10 to the FPC board 20, and the total heat of the PCB board 10 is reduced; in the case where, for example, the overcurrent copper foil is laid on the inner layer of the PCB board 10, there is no risk of excessive temperature rise on the PCB board 10. For the battery protection board according to this solution, the heat dissipation effect is better, and the risk of short circuit between the positive and negative electrodes of the PCB layer is avoided.

[0100] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present utility model. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0101] The present utility model has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and the present utility model is not limited to the above embodiments. According to the teachings of the present utility model, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection required by the present utility model.

Claims

1. A battery protection board, characterized in that, The battery protection board includes: A PCB board, the PCB board includes a first electrical connection portion, a third electrical connection portion, and a fifth electrical connection portion arranged at intervals, the current polarity of the first electrical connection portion is one of positive polarity and negative polarity, and the current polarities of both the third electrical connection portion and the fifth electrical connection portion are the same and are the other of positive polarity and negative polarity; and An FPC board, the FPC board includes a second electrical connection portion, a fourth electrical connection portion, a sixth electrical connection portion, a first output portion, and a second output portion arranged at intervals, the second electrical connection portion is electrically connected to the first electrical connection portion, and the second electrical connection portion is electrically connected to both the first output portion and the second output portion; the fourth electrical connection portion is electrically connected to the third electrical connection portion, the sixth electrical connection portion is electrically connected to the fifth electrical connection portion, the fourth electrical connection portion is electrically connected to at least one of the first output portion and the second output portion, and the sixth electrical connection portion is electrically connected to at least the other of the first output portion and the second output portion.

2. The battery protection board according to claim 1, characterized in that, The fourth electrical connection portion is electrically connected to the first output portion, and the sixth electrical connection portion is electrically connected to the second output portion.

3. The battery protection board according to claim 2, wherein The fourth electrical connection portion is located between the first output portion and the sixth electrical connection portion; and / or the sixth electrical connection portion is located between the fourth electrical connection portion and the second output portion.

4. The battery protection board according to claim 1, characterized in that, Compared with the second output portion, the fourth electrical connection portion is closer to the first output portion; and / or compared with the first output portion, the sixth electrical connection portion is closer to the second output portion.

5. The battery protection board according to claim 1, characterized in that, The first output portion, the second electrical connection portion, the fourth electrical connection portion, the sixth electrical connection portion, and the second output portion are arranged at intervals in a first direction.

6. The battery protection board according to claim 1, wherein The first electrical connection portion, the second electrical connection portion, the third electrical connection portion, the fourth electrical connection portion, the fifth electrical connection portion, and the sixth electrical connection portion are all composed of pads.

7. The battery protection board according to claim 5, characterized in that, Both the first electrical connection portion and the third electrical connection portion are located at the first end of the PCB board in the first direction, and the fifth electrical connection portion is located at the second end of the PCB board opposite to the first end; and / or the first output portion and the second output portion are respectively located at both ends of the FPC board in the first direction.

8. The battery protection board according to claim 1, wherein On the side of the PCB board facing away from the FPC board, a battery positive electrode electrical connection portion and a battery negative electrode electrical connection portion are provided, and the first electrical connection portion is closer to the one with the same current polarity among the battery positive electrode electrical connection portion and the battery negative electrode electrical connection portion.

9. The battery protection board according to any one of claims 1 to 8, characterized in that, Multiple layers of conductors are provided inside the PCB board, the PCB board includes a first overcurrent area and a second overcurrent area, the first electrical connection portion and the third electrical connection portion are located in the first overcurrent area, the fifth electrical connection portion is located in the second overcurrent area, and the multiple layers of conductors have the same current polarity at the second overcurrent area.

10. The battery protection board according to any one of claims 1 to 8, characterized in that, Electronic components are provided on the side of the PCB board facing away from the FPC board and / or on the other side facing the FPC board, and the current polarity of the electronic components is the same as that of the fifth electrical connection portion.

11. The battery protection board according to any one of claims 1 to 8, characterized in that, The FPC board is stacked with the PCB board in the thickness direction.

12. The battery protection board according to any one of claims 1 to 8, characterized in that, The FPC board extends beyond both ends of the PCB board in the first direction in the first direction.

13. The battery protection board according to any one of claims 1 to 8, characterized in that, Both the first output part and the second output part include output terminals for outputting positive-polarity current and negative-polarity current.

14. A battery assembly, characterized in that, It includes a battery and a battery protection board according to any one of claims 1 to 13, and the battery is electrically connected to the PCB board.

15. A terminal device, characterized in that, The terminal device includes the battery assembly according to claim 14.

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