Circuit board assembly and electrical appliance

Abstract

The utility model discloses a circuit board assembly and electric equipment, wherein the circuit board assembly includes: protection board, adapter plate, FPC and sampling line connector, and protection board and adapter plate are laminated distribution, can effectively reduce the space occupation in plane. Wherein protection board is equipped with first electric connection department and first signal connection department, and adapter plate is equipped with second electric connection department and second signal connection department, and first electric connection department and second electric connection department are connected through FPC, and first signal connection department and second signal connection department are connected through sampling line connector. Relative to the mode of connecting through the thicker wire of tradition, the connection of protection board and adapter plate is realized through FPC and sampling line connector, not only can reduce the weight, can effectively reduce the space occupation, and can effectively shorten the current path, reduce power loss and heat, and then promote the operation efficiency of equipment, and can also improve the stability and reliability of signal transmission.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, and in particular to a circuit board assembly and electrical equipment. Background Technology

[0002] Battery protection boards are a key circuit component that plays an important role in battery management systems, power protection, and other fields.

[0003] Traditional battery protection boards are usually rectangular or square plate structures. When connecting them to adapter boards, they require thicker wires, resulting in a large space occupation and hindering the lightweight and miniaturization design of the product.

[0004] Therefore, how to reduce the space occupied by circuit board assemblies is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a circuit board assembly that can effectively reduce space occupation, and another objective is to provide an electrical device including the above-mentioned circuit board assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A circuit board assembly includes: a protection board, an adapter board, an FPC, and a sampling line connector. The protection board and the adapter board are stacked together. The protection board has a first electrical connection portion and a first signal connection portion. The adapter board has a second electrical connection portion and a second signal connection portion. The first electrical connection portion and the second electrical connection portion are connected through the FPC, and the first signal connection portion and the second signal connection portion are connected through the sampling line connector.

[0008] In some embodiments, the protection board has a power component mounting area and a non-power component mounting area, as well as isolation holes that isolate the power component mounting area and the non-power component mounting area. The power component mounting area is connected to a power component, and the non-power component mounting area is connected to a non-power component.

[0009] In some embodiments, the protective plate is provided with a plurality of isolation holes that are spaced apart in sequence.

[0010] In some embodiments, the heat-generating components on the protection board are provided with heat sinks.

[0011] In some embodiments, the heat-generating component includes a MOS component, and the heat sink is attached to the MOS component.

[0012] In some embodiments, the protection plate includes a base plate, with first extension portions at both ends extending along a first direction and second extension portions at both ends extending along a second direction, the first extension direction being perpendicular to the second extension direction, and each of the two first extension portions having a first electrical connection portion; one of the second extension portions having a first signal connection portion and the other of the second extension portions having an output connector; two FPCs connected to the two first extension portions are located on both sides of the second extension portion having the output connector; the adapter plate has two second electrical connection portions at one end extending along the second direction and a second signal connection portion at the other end.

[0013] In some embodiments, the first electrical connection portion is a first FPC pad, the second electrical connection portion is a second FPC pad, and the two ends of the FPC that are welded to the first FPC pad and the second FPC pad are respectively provided with opening slots.

[0014] In some embodiments, power components are arranged on one side of the protection plate, and non-power components are arranged on the other side.

[0015] In some embodiments, an adhesive-backed foam support portion is provided between the protective plate and the adapter plate.

[0016] An electrical device comprising any of the circuit board assemblies described above.

[0017] Compared with existing technologies, the above technical solution has at least the following advantages:

[0018] This utility model provides a circuit board assembly comprising: a protection board, an adapter board, an FPC, and a sampling line connector. The protection board and the adapter board are stacked, effectively reducing space occupation in a plane. The protection board has a first electrical connection portion and a first signal connection portion; the adapter board has a second electrical connection portion and a second signal connection portion. The first and second electrical connection portions are connected via the FPC, and the first and second signal connection portions are connected via the sampling line connector. Compared to the traditional method of connecting with thicker wires, connecting the protection board and the adapter board via the FPC and sampling line connector not only reduces weight and space occupation but also shortens the current path, reduces power loss and heat generation, thereby improving equipment operating efficiency and enhancing signal transmission stability and reliability.

[0019] The electrical device provided by this utility model has corresponding advantages because it includes the above-mentioned circuit board assembly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 An exploded view of a circuit board assembly provided for a specific embodiment of this utility model;

[0022] Figure 2 A three-dimensional structural diagram of a circuit board assembly provided for a specific embodiment of the present utility model;

[0023] Figure 3 for Figure 1 A top view of the protective plate in the middle;

[0024] Figure 4 for Figure 1 A top view of the protective plate with heat sinks installed.

[0025] Figure 5 for Figure 1 A schematic diagram of the bottom structure of the protective plate in the middle;

[0026] Figure 6 for Figure 1 A top view of the adapter plate in the diagram;

[0027] Figure 7 for Figure 1 A schematic diagram of the structure when the adapter plate is connected to the FPC;

[0028] Figure 8 for Figure 1 A schematic diagram of the unfolded structure of the FPC in the diagram;

[0029] Figure 9 for Figure 1 The unfolded diagram of the protection board and adapter board connected via FPC;

[0030] Figure 10 for Figure 9 The diagram shows the unfolded form of the adapter board connected to the sampling line connector.

[0031] Figure 11 for Figure 10 A schematic diagram of the structure after the adapter plate is flipped over and connected to the protection plate.

[0032] The attached figures are labeled as follows:

[0033] 1-Protection board; 101-Power component mounting area; 1011-Fuse; 1012-MOS; 1013-Output connector; 102-Non-power component mounting area; 1021-Voltage detection IC; 1022-Lamp board connector; 1023-MCU; 11-Base plate; 12-First extension; 13-Second extension; 14-First electrical connection; 15-First signal connection; 16-Isolation hole;

[0034] 2-Adapter board; 21-Second electrical connection part; 22-Second signal connection part; 23-Nickel sheet;

[0035] 3-FPC; 31-Opening slot;

[0036] 4-Sampling line connector;

[0037] 5-Heat sink. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please refer to Figures 1 to 11 .

[0040] This utility model provides a circuit board assembly including: a protection board 1, an adapter board 2, an FPC 3 (flexible printed circuit board), and a sampling line connector 4. The protection board 1 and the adapter board 2 are stacked, wherein the stacking arrangement includes the protection board 1 and the adapter board 2 being arranged parallel to each other, or the adapter board 2 being arranged at an angle relative to the protection board 1. Figure 1 and Figure 2As shown, the protection plate 1 and the adapter plate 2 are parallel to each other, with the protection plate 1 located above the adapter plate 2. By stacking the protection plate 1 and the adapter plate 2, the space occupied in the plane can be effectively reduced. There are electrical and signal connections between the protection plate 1 and the adapter plate 2, where the electrical connection is used to pass current and the signal connection is used to transmit signals. The protection plate 1 is provided with a first electrical connection part 14 and a first signal connection part 15; the adapter plate 2 is provided with a second electrical connection part 21 and a second signal connection part 22. For ease of connection, the first electrical connection part 14 and the second electrical connection part 21 are located on the same side of the protection plate 1 and the adapter plate 2, and the first signal connection part 15 and the second signal connection part 22 are located on the same side of the protection plate 1 and the adapter plate 2, wherein the side with the electrical connection and the side with the signal connection are preferably different sides. The first electrical connection part 14 and the second electrical connection part 21 are connected by FPC3. Compared with the traditional method of connecting with thicker wires, this not only reduces weight but also effectively reduces space occupation. It can also effectively shorten the current path, reduce power loss and heat generation, thereby improving the operating efficiency of the equipment. The first signal connection part 15 and the second signal connection part 22 are connected by sampling line connector 4. The sampling connector 4 can improve the stability and reliability of signal transmission.

[0041] In some embodiments, the protection board 1 includes a power component mounting area 101 and a non-power component mounting area 102, wherein the power component mounting area 101 is connected to power components, and the non-power component mounting area 102 is connected to non-power components. The power components mainly include MOS 1012, Fuse 1011, and some current sensing resistors and power capacitors, etc., and the current flow path is as follows: Figure 3 As shown, the current starts from the first electrical connection 14 on the left, passes through the fuse 1011, then through the MOS 1012, and then through some power capacitors and other components, finally reaching the first electrical connection 14 on the right. The non-power components mainly include the MCU 1023, the voltage detection IC 1021, and some capacitors, resistors, diodes, and other components. The non-power component mounting area 102 on the protection board 1 also houses the lamp board connector 1022. The signal transmission path is as follows: Figure 3 As shown, the signal starts from the left side of the first signal connection part 15, passes through a resistor, then through the voltage detection IC 1021, and then through some capacitors, resistors and other components through the MCU 1023. Finally, it returns to the right side of the first signal connection part 15 through capacitors, resistors and other components to complete the closed-loop control of signal transmission.

[0042] Because power components generate high-frequency noise and electromagnetic fields during operation, they can interfere with sensitive signals in non-power areas through radiation and conduction. To prevent current from affecting signals, this embodiment of the invention provides isolation holes 16 on the protection board 1. Isolation holes 16 isolate the power component mounting area 101 from the non-power component mounting area 102, preventing interference from power components in the power component mounting area 101 to non-power components in the non-power component mounting area 102. This reduces the risk of signal distortion, false triggering, and false detection, ensuring the normal operation of non-power components and thus guaranteeing the stability of the protection board 1. Furthermore, the isolation holes 16 also provide a channel for heat dissipation of the protection board 1, effectively improving its heat dissipation performance. The shape of the isolation holes 16 can be selected according to actual needs; this embodiment does not limit its specific shape, as long as it can achieve physical isolation between the power component mounting area 101 and the non-power component mounting area 102. For example, it can be a strip-shaped hole, an L-shaped hole, or an arc-shaped hole.

[0043] In some embodiments, the protection plate 1 is provided with a plurality of isolation holes 16 arranged at intervals. The isolation holes 16 can be located in the same extending direction or in different extending directions. By providing a plurality of isolation holes 16, the structural strength of the protection plate 1 can be guaranteed while achieving isolation of the power component mounting area 101 and the non-power component mounting area 102. For example Figure 3 As shown, each isolation hole 16 is an L-shaped structure. Isolation in the X and Y directions can be achieved through the L-shaped isolation hole 16. For a single L-shaped isolation hole 16, it can be formed in one operation. Compared with a single strip-shaped isolation hole 16, it can effectively improve the convenience of processing.

[0044] In some embodiments, the heat-generating components on the protection board 1 are provided with heat sinks 5. The heat sink 5 can be a graphite heat sink, or other materials with good thermal conductivity can be selected to make the heat sink. The heat-generating components include, but are not limited to, MOS components. During operation, the current passing through the MOS components generates a large amount of heat. If it is not effectively dissipated, the heat will accumulate in the MOS component area and then affect the surrounding components, causing the protection board 1 to activate protection prematurely, thereby causing the battery to fail. In this embodiment, by attaching the heat sink to the MOS components, the heat dissipation effect of the MOS components can be effectively improved.

[0045] It should be noted that the protection board 1 typically has multiple heat-generating components. When these components are irregularly arranged, a uniquely shaped heat sink can be used for heat dissipation, for example... Figure 1 and Figure 5The irregularly shaped heat sink 5 shown can cover multiple heat-generating components and be attached to the upper surface of the heat-generating components to achieve heat dissipation for multiple heat-generating components, thereby reducing the number of heat sinks 5 and making it easier to attach the heat sink 5.

[0046] In some embodiments, the protective plate 1 includes a base plate 11, please refer to... Figure 3 The base plate 11 has a first extension portion 12 at each end extending along a first direction, and a second extension portion 13 at each end extending along a second direction. The first extension direction is perpendicular to the second extension direction, meaning the base plate 11 has a cross-shaped structure. Compared to a rectangular structure, this reduces the space occupied at the four corners and also reduces the amount of sheet material used. Each of the two first extension portions 12 has a first electrical connection portion 14, such as... Figure 3 As shown, a first electrical connection portion 14 is provided on the first extension portion 12 on the left side, and a second electrical connection portion is provided on the first extension portion 12 on the right side, and the two first electrical connection portions 14 are preferably provided on the same side of the same surface of the two first extension portions 12; one of the second extension portions 13 is provided with a first signal connection portion 15, and the other second extension portion 13 is provided with an output connector 1013; the two FPC3s connected to the two first extension portions 12 are located on both sides of the second extension portion 13 provided with the output connector 1013, as shown. Figure 2 and Figure 11 As shown, the notch between the first extension 12 and the second extension 13 can accommodate the FPC3, thus reducing the space occupied by the FPC3 in the second extension direction. The output connector 1013 is preferably mounted on the back side of the second extension 13, as shown below. Figure 2 and Figure 5 As shown, the output connector 1013 is located on the side of the protection board 1 facing the adapter board 2; the adapter board 2 has two second electrical connection parts 21 at one end extending along the second direction, and a second signal connection part 22 at the other end, as shown. Figure 9 As shown, the two second electrical connection portions 21 on the adapter plate 2 correspond one-to-one with the two first electrical connection portions 14 on the protection plate 1, and the second signal connection portion 22 also corresponds to the first signal connection portion 15. In addition to the second electrical connection portions 21 and the second signal connection portions 22, the adapter plate 2 also has other features such as... Figure 6 As shown, it is also provided with tabs for connecting to the nickel plate 23, which is used to supply battery terminals. Furthermore, the overall structure of the adapter plate 2 is preferably configured in a convex shape, such as... Figure 6 and Figure 7 As shown, the adapter plate 2 has notches on both sides of the end away from the second electrical connection part 21, and the nickel sheet 23 is designed near the notch.

[0047] In some embodiments, the first electrical connection portion 14 is a first FPC pad, the second electrical connection portion 21 is a second FPC pad, and the two ends of the FPC that are soldered to the first FPC pad and the second FPC pad are respectively provided with opening slots 31, such as... Figure 8 The FPC shown has multiple opening slots 31 at both ends. These slots 31 at the same end are preferably evenly spaced. The opening slots 31 are preferably semi-circular in shape. This design facilitates SMT soldering and increases ventilation during soldering, preventing porosity and instability that could lead to FPC3 detachment. The FPC3 is preferably L-shaped, with the end connecting to the adapter plate 2 having a larger dimension in the first extension direction than the end connecting to the protection plate 1. This design increases the contact area with the adapter plate 2, thereby improving connection stability. During assembly, if... Figure 7 As shown, one end of FPC3 can be soldered to the second FPC pad on one end of the adapter board 2, and then the other end of FPC3 can be soldered to the first FPC pad on the protection board 1. The unfolded view of the protection board 1 and the adapter board 2 after FPC soldering is shown below. Figure 9 As shown, one end of the sampling line connector 4 can be soldered to the second signal connection part 22 of the adapter board 2. After folding the adapter board 2 relative to the protection board 1, the other end of the sampling line connector 4 can be connected to the first signal connection part 15 provided on the protection board 1. During the operation of the circuit board assembly, the current on the adapter board 2 is mainly conducted to the protection board 1 through the FPC3, and then the current on the protection board 1 is transmitted to the output connector 1013 through the power components. The signal transmission on the adapter board 2 is mainly transmitted to the protection board 1 through the sampling line connector 4, and then the signal on the protection board 1 is transmitted to the output connector 1013 by the non-power components.

[0048] In some embodiments, power components, such as MOS, relays and fuses, are arranged on one side of the protection board 1; non-power components, such as protection ICs, voltage sensing resistors, temperature sensing elements, capacitors and resistors, are arranged on the other side of the protection board 1. This layout can increase the area utilization of the protection board 1, thereby improving the integration of the circuit board assembly, and reduce the interference of power components on non-power components.

[0049] In some embodiments, an adhesive-backed foam support portion is provided between the protective plate 1 and the adapter plate 2, such as... Figure 2 and Figure 11As shown, there are components in the gap between the lower surface of the protective plate 1 and the upper surface of the adapter plate 2. In order to prevent the components between the protective plate 1 and the adapter plate 2 from contacting each other, the adhesive foam support can fill the gap between the protective plate 1 and the adapter plate 2, thereby fixing the relative position of the protective plate 1 and the adapter plate 2 and improving the structural strength of the protective plate 1 and the adapter plate 2.

[0050] This utility model embodiment also provides an electrical device, including the circuit board assembly provided in any of the above embodiments. The electrical device includes, but is not limited to, vehicles and mobile terminal devices. Regarding the beneficial effects of the electrical device, please refer to the circuit board assembly described above, and it will not be repeated here.

[0051] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The circuit board assembly and electrical device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A circuit board assembly, characterized in that, include: The system includes a protection board (1), an adapter board (2), an FPC (3), and a sampling line connector (4). The protection board (1) and the adapter board (2) are stacked together. The protection board (1) has a first electrical connection part (14) and a first signal connection part (15). The adapter board (2) has a second electrical connection part (21) and a second signal connection part (22). The first electrical connection part (14) and the second electrical connection part (21) are connected through the FPC (3), and the first signal connection part (15) and the second signal connection part (22) are connected through the sampling line connector (4).

2. The circuit board assembly of claim 1, wherein, The protection plate (1) is provided with a power component mounting area (101) and a non-power component mounting area (102) and an isolation hole (16) for isolating the power component mounting area (101) and the non-power component mounting area (102). The power component mounting area (101) is connected to a power component, and the non-power component mounting area (102) is connected to a non-power component.

3. The circuit board assembly of claim 2, wherein, The protective plate (1) is provided with a plurality of isolation holes (16) arranged in sequence at intervals.

4. The circuit board assembly according to claim 1, characterized in that, The heat-generating components on the protection board (1) are provided with heat sinks (5).

5. The circuit board assembly according to claim 4, characterized in that, The heat-generating components include MOS components, and the heat sink (5) is attached to the MOS components.

6. The circuit board assembly of claim 1, wherein, The protection plate (1) includes a base plate (11), with a first extension (12) at each end of the base plate (11) extending along a first direction and a second extension (13) at each end of the base plate (11) extending along a second direction. The first extension direction is perpendicular to the second extension direction. Each of the two first extensions (12) is provided with a first electrical connection (14). One of the second extensions (13) is provided with a first signal connection (15), and the other of the second extensions (13) is provided with an output connector (1013). The two FPCs (3) connected to the two first extensions (12) are located on both sides of the second extension (13) provided with the output connector (1013). The adapter plate (2) is provided with two second electrical connections (21) at one end of the second direction and a second signal connection (22) at the other end.

7. The circuit board assembly of claim 6, wherein, The first electrical connection part (14) is the first FPC pad, the second electrical connection part (21) is the second FPC pad, and the two ends of the FPC (3) that are welded to the first FPC pad and the second FPC pad are respectively provided with opening slots (31).

8. The circuit board assembly of claim 1, wherein, One side of the protection plate (1) is arranged with power components, and the other side is arranged with non-power components.

9. The circuit board assembly according to any one of claims 1 to 8, characterized in that, An adhesive foam support is provided between the protective plate (1) and the adapter plate (2).

10. An electric device, characterized by Includes the circuit board assembly as described in any one of claims 1 to 9.

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