Power distribution circuit, circuit board and power distribution box

Abstract

The application relates to a power distribution circuit, a circuit board and a power distribution box. The power distribution circuit comprises an input interface module, an output interface module, a voltage adjustment module, a plurality of first power supply branches and a plurality of second power supply branches. The input end of the input interface module is used for connecting an external power supply; the plurality of output ends of the output interface module are used for one-to-one corresponding connection with a plurality of power consumption devices; the input end of the voltage adjustment module is connected with the output end of the input interface module; the plurality of first power supply branches are one-to-one corresponding connected in series between the plurality of output ends of the voltage adjustment module and the plurality of first input ends of the output interface module; the plurality of second power supply branches are one-to-one corresponding connected in series between the output end of the input interface module and the plurality of second input ends of the output interface module; wherein, at least one first power supply branch and at least one second power supply branch are provided with a detachable fuse. The power distribution circuit can improve the reliability of the power distribution circuit and reduce the maintenance cost.

Description

Technical Field

[0001] This application relates to the field of power distribution technology, and in particular to a power distribution circuit, circuit board and distribution box. Background Technology

[0002] As the automotive industry rapidly develops towards intelligence, vehicles are placing higher demands on the reliability, maintainability, and software compatibility of their power distribution systems.

[0003] Currently, there are two main technical solutions in the automotive power distribution field. One is the traditional plug-in type power distribution box, which relies on manual wiring and assembly. The automation level is low, which not only limits production efficiency but also makes it prone to high failure rates due to wiring errors. Furthermore, it is difficult to achieve efficient upgrades and maintenance in the after-sales stage and cannot adapt to the functional iteration requirements of intelligent vehicles. The other is the intelligent power distribution box, which has software control capabilities. However, core components such as MOSFETs are highly integrated into the power distribution box. Once such components are damaged, the entire power distribution box needs to be replaced, resulting in poor after-sales repairability and significantly increased maintenance costs.

[0004] Meanwhile, the two existing types of distribution boxes generally lack overcurrent protection redundancy design, making it difficult to provide reliable protection for the output lines, which can easily lead to safety hazards in complex vehicle power consumption scenarios. Utility Model Content

[0005] Therefore, it is necessary to provide a power distribution circuit, a circuit board, and a power distribution box.

[0006] In a first aspect, this application provides a power distribution circuit, which includes:

[0007] The input interface module has an input terminal for connecting to an external power supply.

[0008] The output interface module has multiple output terminals for connecting to multiple electrical devices in a one-to-one correspondence.

[0009] The voltage adjustment module has its input terminal connected to the output terminal of the input interface module.

[0010] Multiple first power supply branches are connected in series one-to-one between multiple output terminals of the voltage regulation module and multiple first input terminals of the output interface module.

[0011] Multiple second power supply branches are connected in series one-to-one between the output terminal of the input interface module and multiple second input terminals of the output interface module;

[0012] Among them, at least one first power supply branch and at least one second power supply branch are equipped with removable fuses.

[0013] In one embodiment, the plurality of first power supply branches include at least two of the following circuits:

[0014] A series-connected switching transistor and a removable fuse;

[0015] wire;

[0016] Switching transistor;

[0017] A relay connected in series and a removable fuse;

[0018] Removable fuse.

[0019] In one embodiment, the plurality of second power supply branches include at least two of the following circuits:

[0020] Removable fuse;

[0021] A series-connected switching transistor and a removable fuse;

[0022] Switching transistor.

[0023] In one embodiment, the voltage regulation module includes:

[0024] The power supply control unit has its first end connected to the output end of the input interface module.

[0025] The drive unit has a first end connected to the second end of the power supply control unit, and the second end of the drive unit is connected to the third end of the power supply control unit.

[0026] Among them, multiple first power supply branches are connected in series one-to-one between multiple output terminals of the drive unit and multiple first input terminals of the output interface module.

[0027] In one embodiment, the power supply control unit includes:

[0028] The power chip has its first end connected to the output end of the input interface module and its second end connected to the first end of the drive unit.

[0029] The controller has its first terminal connected to the third terminal of the power chip, and its second terminal connected to the second terminal of the drive unit.

[0030] In one embodiment, the power supply control unit further includes:

[0031] A crystal oscillator is connected in series between the clock input of the power supply chip and the clock input of the controller.

[0032] In one embodiment, the power distribution circuit further includes:

[0033] The main fuse has one end connected to an external power source and the other end connected to the input terminal of the input interface module.

[0034] In one embodiment, the power distribution circuit further includes:

[0035] The controller area network (CLAN) bus chip is connected to the output interface module.

[0036] Secondly, this application provides a circuit board, which includes:

[0037] The power distribution circuit is as described in the above embodiments.

[0038] Thirdly, this application provides a power distribution box, which includes:

[0039] case;

[0040] And the circuit board in the above embodiments, which is installed inside the housing.

[0041] The aforementioned power distribution circuit, circuit board, and distribution box have at least the following beneficial effects:

[0042] The voltage adjustment module integrates chip control capabilities and can be linked with the vehicle's OTA system. It can synchronously update its own control program and dynamically adjust the power distribution strategy when the vehicle's software is upgraded. Functional iteration can be achieved without disassembling the hardware, meeting the needs of intelligent power distribution optimization. The design of removable fuses on at least one branch means that in case of failure, only individual components need to be replaced without replacing the entire distribution box, shortening maintenance time and reducing material waste and maintenance costs. At the same time, the removable fuses and the voltage adjustment module form a redundant protection combination. In case of overcurrent, dual protection can be triggered by fuse blowing and current monitoring of the voltage adjustment module, effectively ensuring the stable operation of electrical equipment and circuit systems, and comprehensively improving the safety, reliability and adaptability of the power distribution circuit. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the power distribution circuit in one embodiment;

[0045] Figure 2 This is a schematic diagram of the power distribution circuit in another embodiment. Detailed Implementation

[0046] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0048] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish a first element from another element, or only to distinguish a first terminal from another terminal, and are not positional limitations. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor. As another example, a first terminal may be referred to as a second terminal, and similarly, a second terminal may be referred to as a first terminal. Both the first terminal and the second terminal are ports, but they are not the same port.

[0049] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0050] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0051] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0052] In one exemplary embodiment, such as Figure 1As shown, this application provides a power distribution circuit, which includes an input interface module 2, an output interface module 4, a voltage adjustment module 6, multiple first power supply branches 8, and multiple second power supply branches 10. The input terminal of the input interface module 2 is used to connect to an external power source; the multiple output terminals of the output interface module 4 are used to connect to multiple electrical devices one-to-one; the input terminal of the voltage adjustment module 6 is connected to the output terminal of the input interface module 2; the multiple first power supply branches 8 are connected in series between the multiple output terminals of the voltage adjustment module 6 and the multiple first input terminals of the output interface module 4; the multiple second power supply branches 10 are connected in series between the output terminals of the input interface module 2 and the multiple second input terminals of the output interface module 4; wherein, at least one first power supply branch 8 and at least one second power supply branch 10 are provided with a removable fuse FU.

[0053] The voltage adjustment module 6 is a device in the power distribution circuit that processes voltage, stabilizing and converting the external power supply voltage into an appropriate voltage that meets the needs of the electrical equipment. This ensures that the electrical equipment connected to the first power supply branch 8 receives a safe and stable power supply. It can also be integrated with its internal chip control to achieve intelligent power distribution management, supporting subsequent software upgrades and power distribution strategy optimization. The first power supply branch 8 is the power supply channel after voltage adjustment. Multiple first power supply branches 8 are connected in series between the output terminal of the voltage adjustment module 6 and the first input terminal of the output interface module 4, providing appropriate power to electrical equipment with specific voltage requirements. A removable fuse FU can be installed on the first power supply branch 8. Some first power supply branches 8 can also be equipped with components such as MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) and relays J, etc., to provide multiple overcurrent protection redundancy while maintaining the replaceable maintenance characteristics of the independent components of each first power supply branch 8. The second power supply branch 10 is a power supply channel directly drawn from an external power source. Multiple second power supply branches 10 are connected in series between the output terminal of the input interface module 2 and the second input terminal of the output interface module 4. Removable fuses FU can also be installed on these multiple second power supply branches 10, allowing them to directly power devices that do not require voltage adaptation and can use the original voltage of the external power source without going through the voltage adjustment module 6. This second power supply branch 10 complements the first power supply branch 8, covering the power supply needs of different devices.

[0054] For example, in the aforementioned power distribution circuit, the voltage adjustment module 6 not only has voltage stabilization conversion function but also integrates chip control capabilities. It can be linked with the vehicle's OTA (Over-The-Air) system, synchronously receiving upgrade commands and updating its own control program when the vehicle undergoes software upgrades, thereby achieving dynamic adjustment of the power distribution strategy. For instance, based on the real-time power consumption requirements of different electrical devices, the output parameters of the voltage adjustment module 6 can be optimized via chip optimization, or the on / off logic of the first power supply branch 8 and the second power supply branch 10 can be adapted. Functional iteration of the power distribution system can be completed without disassembling the hardware, adapting to the continuous optimization needs of power distribution strategies in the development of intelligent vehicles. Simultaneously, the first power supply branch 8 and the second power supply branch 10 achieve independent power supply through modular design, preventing a single branch fault from spreading to the entire power distribution system and significantly reducing the overall failure rate.

[0055] Secondly, by installing removable fuses FU on at least one first power supply branch 8 and at least one second power supply branch 10, when the removable fuse FU is damaged, maintenance personnel do not need to replace the entire distribution box, but only need to disassemble and replace the faulty component, which greatly shortens the maintenance time; at the same time, it avoids the scrapping of the entire distribution box due to the failure of local components, reduces material consumption, and lowers after-sales maintenance costs.

[0056] In addition, based on the circuit structure formed by the removable fuse FU and the voltage adjustment module 6, the removable fuse FU and the voltage adjustment module 6 can form a redundant protection combination. For example, when an overcurrent occurs in the first power supply branch 8, the removable fuse FU can preferentially blow and cut off the circuit. If the removable fuse FU does not respond in time, the voltage adjustment module 6 can trigger the protection mechanism through current monitoring, forming multiple overcurrent protections to ensure the stable operation of electrical equipment and circuit systems.

[0057] The aforementioned power distribution circuit features a voltage adjustment module 6 with integrated chip control capabilities that can be linked with the vehicle's OTA system. It can synchronously update its control program and dynamically adjust the power distribution strategy during vehicle software upgrades, achieving functional iteration without hardware disassembly and meeting the needs of intelligent power distribution optimization. The design of a removable fuse FU on at least one branch eliminates the need to replace the entire distribution box in case of a fault, requiring only the replacement of individual components, thus shortening repair time and reducing material waste and repair costs. Simultaneously, the removable fuse FU and the voltage adjustment module 6 form a redundant protection combination. In case of overcurrent, the removable fuse FU's melting and the voltage adjustment module 6's current monitoring trigger dual protection, effectively ensuring the stable operation of electrical equipment and the circuit system, and comprehensively improving the safety, reliability, and adaptability of the power distribution circuit.

[0058] In one exemplary embodiment, such as Figure 2As shown, the multiple first power supply branches 8 include at least two of the following circuits: a series-connected switch Q and a removable fuse FU; a wire; a switch Q; a series-connected relay J and a removable fuse FU; and a removable fuse FU.

[0059] For example, when there are two first power supply branches 8, one of them can consist of a series-connected switch Q and a removable fuse FU to provide overcurrent protection for electrical equipment with high power supply stability requirements (such as vehicle sensors); the other can consist of only wires to provide simplified power supply for low-power devices that do not require additional protection (such as indicator lights). When there are three first power supply branches 8, one can consist of only a switch Q, another can consist of a series-connected relay J and a removable fuse FU, and yet another can consist of only a removable fuse FU. The "switch Q" branch can be precisely switched on and off via chip control; the "series-connected relay J and removable fuse FU" branch can provide dual protection for high-power devices (such as vehicle air conditioners); and the "removable fuse FU" branch can provide basic overcurrent protection for conventional devices (such as window control modules).

[0060] In this embodiment, multiple first power supply branches 8 support flexible combinations of various basic circuits to match the differentiated requirements of different electrical devices in the vehicle (such as sensors, high-power components, conventional control modules, etc.) for power supply protection levels and control methods, avoiding functional redundancy or insufficient protection caused by a single circuit design. At the same time, the removable fuses FU, relays J, and other components included in the branches retain independent replacement characteristics. During after-sales maintenance, specific components of the faulty branch can be handled separately without replacing the entire branch or distribution box, reducing maintenance costs and time. Furthermore, the switching transistors Q and relays J in some branches can be combined with the chip control of the voltage adjustment module 6 to achieve intelligent switching and status monitoring, and with OTA upgrades to optimize the power distribution strategy, it takes into account both intelligent adaptation and high reliability.

[0061] In one exemplary embodiment, such as Figure 2 As shown, the multiple second power supply branches 10 include at least two of the following circuits: a removable fuse FU; a series-connected switch Q and a removable fuse FU; and a switch Q.

[0062] For example, when there are two second power supply branches 10, one second power supply branch 10 may consist of a series-connected switch Q and a removable fuse FU to power devices requiring precise on / off control and overcurrent protection (such as vehicle USB interface modules); the other second power supply branch 10 may consist only of the removable fuse FU to power devices that do not require additional control and only need basic overcurrent protection (such as vehicle low-power indicator lights). As another example, when there are three second power supply branches 10, one second power supply branch 10 may consist only of a fuse, another second power supply branch 10 may consist of a series-connected switch Q and a removable fuse FU, and yet another second power supply branch 10 may consist only of the switch Q. The "switch Q" branch can be described as only requiring chip-controlled on / off switching and powering devices with low overcurrent risk (such as the vehicle ambient light controller 624), while the other two branches are adapted to conventional devices with different protection and control requirements, forming complementary coverage.

[0063] In this embodiment, multiple second power supply branches 10 support flexible combinations of three basic circuits, adapting to the differentiated overcurrent protection and on / off control needs of various electrical devices in the vehicle that do not require voltage adaptation and can directly use external power supplies, avoiding functional waste or protection deficiencies caused by a single circuit design; the removable fuse FU in the branch has independent replacement characteristics, and during after-sales maintenance, the removable fuse FU of the faulty branch can be removed and replaced individually without replacing the entire branch or distribution box, greatly reducing maintenance costs and labor time; at the same time, the branch containing the switching transistor Q can be combined with the chip control of the voltage adjustment module 6 to achieve intelligent on / off management, and with the vehicle OTA upgrade to optimize the power supply logic, it not only ensures the power supply safety and control flexibility of the directly powered branch, but also continues the high maintainability of the traditional distribution box, further improving the adaptability and operational reliability of the power distribution circuit to the diversified power consumption scenarios of the vehicle.

[0064] In one exemplary embodiment, such as Figure 2 As shown, the voltage adjustment module 6 includes a power supply control unit 62 and a drive unit 64. The first end of the power supply control unit 62 is connected to the output end of the input interface module 2; the first end of the drive unit 64 is connected to the second end of the power supply control unit 62, and the second end of the drive unit 64 is connected to the third end of the power supply control unit 62; wherein, multiple first power supply branches 8 are connected in series between multiple output ends of the drive unit 64 and multiple first input ends of the output interface module 4.

[0065] In this embodiment, the power supply control unit 62 is used to receive the raw electrical energy input from the external power source and adjust the voltage of the external power source to an appropriate voltage that meets the requirements of the electrical equipment connected to the first power supply branch 8, ensuring that the electrical equipment receives a safe and stable power supply. The power supply control unit 62 can also integrate chip control capabilities, enabling it to link with the vehicle's OTA system and update the control program synchronously when the vehicle's software is upgraded, thereby dynamically adjusting the voltage output parameters and power distribution strategy. At the same time, through bidirectional connection with the drive unit 64, it can monitor the operating status of the drive unit 64 and issue control commands to ensure that the power supply logic of the first power supply branch 8 is coordinated and matched with the vehicle's power demand. The drive unit 64 is used to receive control commands (such as on / off commands, current adjustment commands, etc.) issued by the power supply control unit 62, and stably transmit the adapted voltage processed by the power supply control unit 62 to the corresponding first power supply branch 8, so as to provide accurate power supply to the electrical equipment connected to the branch. At the same time, the drive unit 64 can transmit the real-time operating status of the first power supply branch 8 (such as current and voltage feedback signals) back to the power supply control unit 62, assisting the power supply control unit 62 to adjust the control strategy in a timely manner. Together with the removable fuse FU, switch Q and other components on the branch, they form a multi-protection mechanism to improve the reliability and safety of the power supply of the first power supply branch 8.

[0066] In one exemplary embodiment, such as Figure 2 As shown, the power supply control unit 62 includes a power chip 622 and a controller 624. The first terminal of the power chip 622 is connected to the output terminal of the input interface module 2, and the second terminal of the power chip 622 is connected to the first terminal of the drive unit 64; the first terminal of the controller 624 is connected to the third terminal of the power chip 622, and the second terminal of the controller 624 is connected to the second terminal of the drive unit 64.

[0067] In this embodiment, the power chip 622 is a device in the power supply control unit 62 responsible for power conversion and stable output. Its first end is connected to the output end of the input interface module 2 to receive the raw power input from the external power source, convert and stabilize the voltage of the raw power, and output an adaptive voltage that meets the requirements of the electrical equipment connected to the first power supply branch 8. At the same time, the second end of the power chip 622 is connected to the first end of the drive unit 64, which can transmit the processed adaptive voltage to the drive unit 64, providing a stable power foundation for the subsequent power supply from the drive unit 64 to the first power supply branch 8, so as to ensure that the electrical equipment in the first power supply branch 8 obtains a safe and reliable voltage input and supports the basic power supply stability of the entire power distribution circuit. The controller 624 can monitor the voltage conversion status and output parameters of the power chip 622 in real time to ensure the stable operation of the power chip 622. The second terminal of the controller 624 is connected to the second terminal of the drive unit 64. On the one hand, it can send control commands such as on / off and current adjustment to the drive unit 64 to guide the drive unit 64 to transmit power to the first power supply branch 8. On the other hand, it can receive the real-time operating status of the first power supply branch 8 (such as current and voltage feedback signals) returned by the drive unit 64. At the same time, the controller 624 can integrate chip control capabilities and link with the vehicle OTA system. When the vehicle software is upgraded, it can update its own control program synchronously. Then, by adjusting the control logic of the power chip 622 and the drive unit 64, it can dynamically optimize the power distribution strategy, realize the intelligent iteration of the power distribution system, and ensure that the power supply logic of the first power supply branch 8 is matched with the power demand of the vehicle.

[0068] In one exemplary embodiment, such as Figure 2 As shown, the power supply control unit 62 also includes a crystal oscillator 626. The crystal oscillator 626 is connected in series between the clock terminal of the power supply chip 622 and the clock terminal of the controller 624.

[0069] In this embodiment, the crystal oscillator 626 provides a high-precision and high-stability unified clock signal for the power chip 622 and the controller 624, ensuring that the two maintain timing synchronization during voltage conversion, control command transmission and reception, and operation status monitoring. This reduces the problems of voltage output parameter fluctuations of the power chip 622, command delays or logic disorder caused by inconsistent clock signals, so that the power chip 622 can stably output a voltage that is compatible with the first power supply branch 8, and the controller 624 can accurately receive the operation status data of the first power supply branch 8 returned by the drive unit 64 and adjust the control strategy for the power chip 622 and the drive unit 64 in a timely manner.

[0070] In one exemplary embodiment, such as Figure 2 As shown, the power distribution circuit also includes a main fuse 12. One end of the main fuse 12 is used to connect to an external power source, and the other end of the main fuse 12 is connected to the input terminal of the input interface module 2.

[0071] In this embodiment, the main fuse 12 can preferentially blow when an abnormal overcurrent occurs in the external power supply (such as a surge in current caused by a sudden increase in supply voltage, or a short circuit in the external circuit being conducted to the power distribution system). This directly cuts off the power transmission path between the external power supply and the input interface module 2, preventing the abnormal overcurrent from entering components such as the voltage adjustment module 6, the first power supply branch 8, and the second power supply branch 10 inside the power distribution circuit. This effectively protects the entire power distribution system from overcurrent damage and reduces the risk of overall power distribution circuit failure caused by external power supply failure. At the same time, the main fuse 12 is set independently. If it blows due to overcurrent during after-sales maintenance, only the main fuse 12 needs to be replaced to restore the connection between the power distribution circuit and the external power supply. There is no need to inspect or replace other modules, which further improves the convenience of after-sales maintenance and reduces maintenance costs.

[0072] In one exemplary embodiment, such as Figure 2 As shown, the power distribution circuit also includes a controller local area network (CLAN) bus chip 14. The CLAN bus chip 14 is connected to the output interface module 4.

[0073] In this embodiment, the Controller Area Network (CAN) chip 14 can build a communication bridge between the power distribution circuit and the vehicle's CAN network, enabling the operating status (such as current consumption, fault signals, etc.) of each electrical device connected to the output interface module 4 to be transmitted to the vehicle control system in real time via the CAN bus. Simultaneously, the power distribution commands from the vehicle control system can also be accurately sent to the power distribution circuit via the CAN bus, realizing information interaction and collaborative control between the power distribution system and the vehicle system. Furthermore, the Controller Area Network (CAN) chip 14 not only allows the vehicle to monitor the power supply status of each electrical device in real time, promptly detect and troubleshoot power supply anomalies, and improve vehicle electrical safety, but also, in conjunction with the OTA upgrade function of the voltage adjustment module 6, dynamically optimize the power distribution strategy based on the vehicle's operating conditions, such as adjusting the power supply priority of each electrical device according to different driving modes.

[0074] In one exemplary embodiment, this application provides a circuit board that includes the power distribution circuit described in the above embodiments.

[0075] In one exemplary embodiment, this application provides a power distribution box, which includes a housing and a circuit board as described in the above embodiment, the circuit board being mounted inside the housing.

[0076] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A power distribution circuit, characterized in that, The power distribution circuit includes: An input interface module, wherein the input terminal of the input interface module is used to connect to an external power supply; An output interface module, wherein multiple output terminals of the output interface module are used to connect to multiple electrical devices in a one-to-one correspondence; A voltage adjustment module, wherein the input terminal of the voltage adjustment module is connected to the output terminal of the input interface module; Multiple first power supply branches are connected in series one-to-one between multiple output terminals of the voltage adjustment module and multiple first input terminals of the output interface module; Multiple second power supply branches are connected in series one-to-one between the output terminal of the input interface module and multiple second input terminals of the output interface module; Among them, at least one of the first power supply branches and at least one of the second power supply branches are equipped with a removable fuse.

2. The power distribution circuit according to claim 1, characterized in that, The plurality of first power supply branches include at least two of the following circuits: A series-connected switching transistor and a removable fuse; wire; Switching transistor; A relay connected in series and a removable fuse; Removable fuse.

3. The power distribution circuit according to claim 1, characterized in that, The plurality of second power supply branches include at least two of the following circuits: Removable fuse; A series-connected switching transistor and a removable fuse; Switching transistor.

4. The power distribution circuit according to claim 1, characterized in that, The voltage adjustment module includes: A power supply control unit, wherein the first end of the power supply control unit is connected to the output end of the input interface module; A drive unit, wherein a first end of the drive unit is connected to a second end of the power supply control unit, and a second end of the drive unit is connected to a third end of the power supply control unit; Among them, multiple first power supply branches are connected in series one-to-one between multiple output terminals of the drive unit and multiple first input terminals of the output interface module.

5. The power distribution circuit according to claim 4, characterized in that, The power supply control unit includes: A power chip, wherein a first end of the power chip is connected to the output end of the input interface module, and a second end of the power chip is connected to the first end of the drive unit; The controller has a first terminal connected to the third terminal of the power chip and a second terminal connected to the second terminal of the drive unit.

6. The power distribution circuit according to claim 5, characterized in that, The power supply control unit also includes: A crystal oscillator is connected in series between the clock terminal of the power supply chip and the clock terminal of the controller.

7. The power distribution circuit according to claim 1, characterized in that, The power distribution circuit also includes: A main fuse, one end of which is connected to the external power supply, and the other end of which is connected to the input terminal of the input interface module.

8. The power distribution circuit according to claim 1, characterized in that, The power distribution circuit also includes: A controller area network (CLAN) bus chip is connected to the output interface module.

9. A circuit board, characterized in that, The circuit board includes: The power distribution circuit as described in any one of claims 1-8.

10. A power distribution box, characterized in that, The distribution box includes: case; And the circuit board as described in claim 9, wherein the circuit board is mounted inside the housing.

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