High-voltage distribution box and vehicle

Abstract

A high-voltage distribution box (10) is connected with a vehicle-mounted battery (20), is used for providing electric energy for an MCU (30) and top-mounted equipment (40) and comprises a shell (11), a positive conductor (12), a negative conductor (13) and a relay (14), and the positive conductor (12), the negative conductor (13) and the relay (14) are contained in the shell (11). The positive electrode and the negative electrode of the battery (20) are respectively connected with the positive electrode conductor (12) and the negative electrode conductor (13); the positive electrode and the negative electrode of the MCU (30) are respectively connected to the positive electrode conductor (12) and the negative electrode conductor (13). The housing (11) has a top-mounted device port (116) for connecting a top-mounted device (40). A power supply anode terminal (117) of the loading equipment (40) is connected to the anode conductor (12); and the relay (14) is connected between the cathode conductor (13) and a power supply cathode terminal (118) of the loading equipment (40) and is used for controlling the loading equipment (40) to be powered on and powered off. The utility model further provides a vehicle using the high-voltage distribution box (10).

Description

TECHNICAL FIELD

[0001] The utility model relates to pure electric vehicle high voltage power distribution technology, specifically, relate to a kind of high voltage power distribution box and the vehicle of application this high voltage power distribution box. BACKGROUND

[0002] At present, when pure electric vehicle is refitted or installs high-power electrical equipment, due to the limitation of the electrical architecture of the vehicle itself, the external power supply interface cannot be connected from the power battery of the driving system, to realize the external electrical equipment (installed equipment) and the vehicle driving motor share the power supply of the whole vehicle power battery system. Usually, the power battery output scheme is modified, a high-voltage output interface is added to the battery pack, to realize power supply to the additional electrical equipment, or an additional power battery independent of the original vehicle high-voltage system is installed, and the additional electrical equipment is powered by the newly added power battery. However, modifying the power battery output scheme has a great impact on the battery, the modification cost is high, the modification cycle is long, and the verification cycle of the power system parts is long; the installation of the power battery scheme has a high modification cost, a more complex system, requires a larger space, and has a high maintenance cost in the later period. SUMMARY

[0003] The utility model aims to provide a kind of high voltage power distribution box, to supply power for installed equipment without changing the original whole vehicle high-voltage system architecture.

[0004] Another object of the utility model is to provide a kind of vehicle, using the above-mentioned high voltage power distribution box to supply power for installed equipment.

[0005] The utility model provides a kind of high voltage distribution box.The high voltage distribution box is connected with vehicle-mounted battery, and is used to provide electric energy for motor controller (Motor Control Unit, MCU) and upper-mounted equipment.The high voltage distribution box includes a shell and a positive conductor, a negative conductor and a relay contained in the shell.The side wall of the shell has a battery positive terminal, a battery negative terminal, an MCU positive terminal, an MCU negative terminal and an upper-mounted equipment port.The battery positive terminal makes the first wire connected with the positive pole of battery pass through the battery positive terminal and connect to the positive conductor.The battery negative terminal makes the second wire connected with the negative pole of battery pass through the battery negative terminal and connect to the negative conductor.The MCU positive terminal makes the third wire connected with the positive pole of MCU pass through the MCU positive terminal and connect to the positive conductor, so as to connect the positive pole of MCU to the positive pole of battery.The MCU negative terminal makes the fourth wire connected with the negative pole of MCU pass through the MCU negative terminal and connect to the negative conductor, so as to connect the negative pole of MCU to the negative pole of battery.The upper-mounted equipment port is used to connect upper-mounted equipment and has a power positive terminal and a power negative terminal.The power positive terminal is connected with the positive conductor at one end, and connected with the positive terminal of upper-mounted equipment at the other end.The power negative terminal is connected with the negative terminal of upper-mounted equipment at one end.The relay has an input terminal and an output terminal.The input terminal is connected to the negative conductor, so as to connect the relay to the negative pole of battery.The output terminal is connected to the other end of the power negative terminal of upper-mounted equipment port, so as to connect the relay between the negative pole of battery and the power negative terminal of upper-mounted equipment.

[0006] The technical solution adds a high voltage distribution box between the power battery and MCU, leads out a high voltage output in the high voltage distribution box, and supplies power to MCU and external high-power electrical equipment.

[0007] In one illustrative embodiment of the high voltage distribution box, the high voltage distribution box further includes a fuse.The fuse is contained in the shell and has a first terminal and a second terminal.The first terminal is connected to the negative conductor, so as to connect the fuse to the negative pole of battery.The second terminal is connected to the input terminal of relay, so as to connect the fuse between the negative pole of battery and the relay.Thus, the upper-mounted equipment branch is protected from overload or overcurrent.

[0008] In another exemplary embodiment of the high-voltage distribution box, the side wall of the housing further has a communication interface for connecting a vehicle control unit (VCU) of the vehicle, and the relay further has a first interface and a second interface. The first interface and the second interface are connected to the communication interface, so that the relay can receive instructions sent by the vehicle control unit. In this way, the closing and opening of the relay are controlled, thereby realizing the power-on and power-off operations of the installed equipment.

[0009] In another exemplary embodiment of the high-voltage distribution box, the positive conductor has a first connecting piece and a second connecting piece. One end of the first connecting piece is fixedly connected to the positive conductor body, and the other end is connected to the first wire, thereby connecting the positive conductor to the positive electrode of the battery. One end of the second connecting piece is fixedly connected to the positive conductor body, and the other end is connected to the third wire, thereby connecting the positive power supply of the MCU to the positive electrode of the battery. The positive power supply terminal of the installed equipment port is connected to the first connecting piece / second connecting piece through the wire, thereby connecting the positive power supply terminal to the positive conductor body. The negative conductor has a third connecting piece and a fourth connecting piece. One end of the third connecting piece is fixedly connected to the negative conductor body, and the other end is connected to the second wire, thereby connecting the negative conductor to the negative electrode of the battery. One end of the fourth connecting piece is fixedly connected to the negative conductor body, and the other end is connected to the fourth wire, thereby connecting the negative power supply of the MCU to the negative electrode of the battery. The input terminal of the relay is connected to the third connecting piece / fourth connecting piece through the wire, thereby connecting the relay to the negative conductor body. In this way, the external installed equipment is powered by the existing power battery system of the vehicle.

[0010] In another exemplary embodiment of the high-voltage distribution box, the high-voltage distribution box further includes a first support, a second support, and a third support fixed to the bottom wall of the housing. The positive conductor has a positive fixing hole, and the positive conductor body is fixed to the first support via the positive fixing hole to support the positive conductor. The negative conductor also has a negative fixing hole, and the negative conductor body is fixed to the second support via the negative fixing hole to support the negative conductor. In this way, the positive conductor and the negative conductor are fixed. The first terminal of the fuse is fixedly connected to the negative conductor body through the negative fixing hole, and the second terminal of the fuse is fixedly connected to the third support, thereby connecting the fuse to the negative electrode port and fixing the fuse, and further connecting the fuse to the installed equipment branch.

[0011] In another exemplary embodiment of the high-voltage distribution box, the installed equipment port has a pair of high-voltage interlock wires, which form a loop with the plug-in detection wires of the installed equipment to detect whether the installed equipment is plugged in place. If not, a prompt is issued. In this way, the plug-in state of the installed equipment is detected.

[0012] The utility model also provides a kind of vehicle, including above-mentioned high voltage distribution box, battery, MCU, upper equipment and whole vehicle controller.Battery's positive and negative pole is connected with the positive conductor and negative conductor of high voltage distribution box respectively through the battery positive terminal and battery negative terminal of high voltage distribution box.MCU's positive and negative pole is connected to the positive conductor and negative conductor of high voltage distribution box respectively through the MCU positive terminal and MCU negative terminal of high voltage distribution box.Upper equipment is connected to the upper equipment port of high voltage distribution box.Whole vehicle controller is connected to the side of the communication interface of high voltage distribution box;The first interface and the second interface of relay are connected to the other side of communication interface respectively, so that relay can receive the instruction sent by whole vehicle controller, control the closure and opening of relay, to control the power-on and / or power-off of upper equipment.Pure electric special vehicle's power battery system is used to supply power to MCU and upper equipment simultaneously.

[0013] The utility model discloses a high voltage distribution box is additionally installed between power battery and MCU, and a high voltage output is led out in high voltage distribution box, supplies power to the external high -power electrical equipment while supplying power to MCU.Thus, by the most convenient and most economical mode, in the case where the original whole vehicle high -voltage system architecture is not changed, directly utilize the power battery system of pure electric vehicle to supply power to external high -power electrical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0014] The following drawings only illustrate and explain the utility model, and do not limit the scope of the utility model.

[0015] Figure 1 It is the schematic application wiring diagram of high voltage distribution box according to one illustrative embodiment of the utility model.

[0016] Figure 2 It is the schematic perspective view of high voltage distribution box according to one illustrative embodiment of the utility model.

[0017] Figure 3 It is the schematic exploded view of high voltage distribution box according to one illustrative embodiment of the utility model.

[0018] Figure 4 It is the schematic view of high voltage distribution box according to one illustrative embodiment of the utility model.

[0019] Figure 5 It is the schematic perspective view of relay according to one illustrative embodiment of the utility model.

[0020] REFERENCE NUMERALS

[0021] 10 high voltage distribution box

[0022] 11 shell

[0023] 111 battery positive terminal port

[0024] 112 battery negative terminal port

[0025] 113 MCU positive terminal port

[0026] 114 MCU negative terminal port

[0027] 115 communication interface

[0028] 116 upper device port

[0029] 117 power supply positive terminal

[0030] 118 power supply negative terminal

[0031] 119 high voltage interlock wire

[0032] 12 positive conductor

[0033] 121 positive conductor body

[0034] 123 first connecting piece

[0035] 125 second connecting piece

[0036] 127 positive mounting hole

[0037] 13 negative conductor

[0038] 131 negative conductor body

[0039] 133 third connecting piece

[0040] 135 fourth connecting piece

[0041] 137 negative mounting hole

[0042] 14 relay

[0043] 141 input terminal

[0044] 143 output terminal

[0045] 145 first interface

[0046] 147 second interface

[0047] 15 fuse

[0048] 151 first terminal

[0049] 153 second terminal

[0050] 16 first support body

[0051] 17 second support body

[0052] 18 third support body

[0053] 20 battery

[0054] 30 MCU

[0055] 40 upper-mounted device

[0056] 50 vehicle controller

[0057] 60 first wire

[0058] 70 second wire

[0059] 80 third wire

[0060] 90 fourth wire DETAILED DESCRIPTION

[0061] In order to have a clearer understanding of the technical features, objectives and effects of the application, the specific implementation manners of the present application will be described with reference to the drawings, and the same reference numerals in the drawings represent the same or similar components with the same function.

[0062] In this document, "illustrative" means "serving as an example, instance, or illustration" and should not necessarily be construed as preferred or advantageous over other examples, implementations, or embodiments.

[0063] In this document, "first", "second", etc. do not indicate the importance or order of the components, but are only used to distinguish them from each other for the purpose of description of the file.

[0064] In order to make the drawings simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product.

[0065] Figure 1 is a schematic application wiring diagram of the high-voltage distribution box according to an illustrative embodiment of the present application. Figure 2 is a schematic perspective view of the high-voltage distribution box according to an illustrative embodiment of the present application. As shown in Figure 1 and 2 The high-voltage distribution box 10 is connected with the vehicle-mounted battery 20, and is used to provide power for the MCU 30 and the upper-mounted device 40. The upper-mounted device 40 can be, for example, a refrigeration machine, a water pump, etc., but is not limited thereto. The high-voltage distribution box 10 includes a housing 11, and the housing 11 has a cover (not shown in the drawings).

[0066] As shown in Figure 2As shown, the high-voltage distribution box 10 further includes a positive conductor 12, a negative conductor 13 and a relay 14 accommodated in the housing 11. The positive conductor 12 and the negative conductor 13 can be, for example, copper bars, but are not limited thereto. The side wall of the housing 11 has a battery positive terminal port 111, a battery negative terminal port 112, an MCU positive terminal port 113, an MCU negative terminal port 114 and an overhead equipment port 116 for connecting the overhead equipment 40. A first wire 60 connecting the positive pole of the battery 20 passes through the battery positive terminal port 111 and is connected to the positive conductor 12. A second wire 70 connecting the negative pole of the battery 20 passes through the battery negative terminal port 112 and is connected to the negative conductor 13. A third wire 80 connecting the positive pole of the MCU 30 passes through the MCU positive terminal port 113 and is connected to the positive conductor 12, thereby connecting the positive pole of the MCU 30 to the positive pole of the battery 20. A fourth wire 90 connecting the negative pole of the MCU 30 passes through the MCU negative terminal port 114 and is connected to the negative conductor 13, thereby connecting the negative pole of the MCU 30 to the negative pole of the battery 20.

[0067] In one example, the first wire 60, the second wire 70, the third wire 80 and the fourth wire 90 are each provided with a terminal piece (not shown in the figure) that seals the battery positive terminal port 111, the battery negative terminal port 112, the MCU positive terminal port 113 and the MCU negative terminal port 114, respectively, when the first wire 60 passes through the battery positive terminal port 111, the second wire 70 passes through the battery negative terminal port 112, the third wire 80 passes through the MCU positive terminal port 113 and the fourth wire 90 passes through the MCU negative terminal port 114, for example, by threaded connection and rubber seal, thereby preventing dust and the like from entering the interior of the housing 11 of the high-voltage distribution box 10 through the battery positive terminal port 111, the battery negative terminal port 112, the MCU positive terminal port 113 and the MCU negative terminal port 114.

[0068] Figure 3 is a schematic exploded view of a high-voltage distribution box according to one illustrative embodiment of the present application. As shown in FIGS. Figure 1 , 2 As shown in FIGS. 1, 2 and 3, in one illustrative embodiment of the high-voltage distribution box 10, the high-voltage distribution box 10 further includes a fuse 15. The fuse 15 is accommodated in the housing 11 and has a first terminal 151 and a second terminal 153. The first terminal 151 is connected to the negative conductor 13, thereby connecting the fuse 15 to the negative pole of the battery 20. The second terminal 153 is connected to the input terminal 141 of the relay 14, thereby connecting the fuse 15 between the negative pole of the battery 20 and the relay 14. In this way, the overhead equipment branch is protected from overload or overcurrent.

[0069] like Figure 1 、 2 As shown in Figures 3 and 4, in another exemplary embodiment of the high-voltage distribution box 10, the positive conductor 12 has a first connector 123 and a second connector 125. One end of the first connector 123 is fixedly connected to the positive conductor body 121, and the other end is connected to the first wire 60, thereby connecting the positive conductor 12 to the positive electrode of the battery 20. One end of the second connector 125 is fixedly connected to the positive conductor body 121. For example, the positive conductor body 121, the first connector 123, and the second connector 125 all have mounting holes, and the first connector 123 and the second connector 125 are respectively fastened to the positive conductor body 121 using fasteners. The other end of the second connector 125 is connected to the third wire 80, thereby connecting the positive power supply terminal 117 of the upper device port 116 to the positive power supply terminal 117 via a wire. The negative conductor 13 has a third connector 133 and a fourth connector 135. One end of the third connector 133 is fixedly connected to the negative conductor body 131, and the other end is connected to the second wire 70, thereby connecting the negative conductor 13 to the negative electrode of the battery 20. One end of the fourth connector 135 is fixedly connected to the negative conductor body 131. For example, the negative conductor body 131, the third connector 133, and the fourth connector 135 all have mounting holes, and the third connector 133 and the fourth connector 135 are respectively fastened to the negative conductor body 131 using fasteners. The other end of the fourth connector 135 is connected to the fourth wire 90, thereby connecting the negative power supply terminal of the MCU 30 to the negative terminal of the battery 20. The input terminal 141 of the relay 14 is connected to the third connector 133 or the fourth connector 135 via a wire, thereby connecting the relay 14 to the negative conductor body 131. In this way, power is supplied to external bodywork equipment through the vehicle's existing power battery system.

[0070] like Figure 3As shown, the high-voltage distribution box 10 further includes a first support body 16, a second support body 17 and a third support body 18 fixed to the bottom wall of the shell 11. The positive conductor 12 has a positive fixing hole 127, and the positive conductor body 121 is fixed to the first support body 16 via the positive fixing hole 127 to support the positive conductor 12. The negative conductor 13 also has a negative fixing hole 137, and the negative conductor body 131 is fixed to the second support body 17 via the negative fixing hole 137 to support the negative conductor 13. The first wiring end 151 of the fuse 15 is fixedly connected to the negative conductor body 131 through the negative fixing hole 137, so as to connect the fuse 15 to the battery negative terminal port 112, and the second wiring end 153 of the fuse 15 is fixedly connected to the third support body 18. For example, the second wiring end 153 and the third support body 18 are both provided with mounting holes, and the second wiring end 153 of the fuse 15 is fastened to the third support body 18 by a fastener. Thus, the fuse is fixed and connected to the upper-mounted device branch.

[0071] Figure 4 is a schematic view of a high-voltage distribution box according to an illustrative embodiment of the present application. As shown in Figure 1 , 3 and 4, the upper-mounted device port 116 has a pair of high-voltage interlocking lines 119. The high-voltage interlocking lines 119 form a loop with the plug-in detection line of the upper-mounted device 40 to detect whether the upper-mounted device 40 is plugged in place, and if not, a prompt is issued. In this way, the plug-in state of the upper-mounted device is detected.

[0072] As shown in Figure 1 , 2 and 3, the side wall of the shell 11 of the high-voltage distribution box 10 further includes a communication interface 115 for connecting the vehicle controller 50. Figure 5 is a schematic perspective view of a relay according to an illustrative embodiment of the present application. As shown in Figure 1 and 5 , the relay 14 further includes a first interface 145 and a second interface 147, which are respectively connected to the communication interface 115, so that the relay 14 can receive the instructions sent by the vehicle controller 50. In this way, the closing and opening of the relay are controlled, thereby realizing the power-on and power-off operations of the upper-mounted device.

[0073] The present application also provides a vehicle, such as various types of pure electric special vehicles, including but not limited to refrigerated trucks, sanitation trucks and water wiping trucks, etc. The vehicle includes the high-voltage distribution box 10, the battery 20, the MCU 30, the upper-mounted device 40 and the vehicle controller 50 as described above, as shown in Figure 1As shown, the positive and negative poles of the battery 20 are connected to the positive conductor 12 and the negative conductor 13 of the high-voltage distribution box 10 through the battery positive terminal port 111 and the battery negative terminal port 112 of the high-voltage distribution box 10, respectively. The positive and negative poles of the MCU 30 are connected to the positive conductor 12 and the negative conductor 13 of the high-voltage distribution box 10 through the MCU positive terminal port 113 and the MCU negative terminal port 114 of the high-voltage distribution box 10, respectively. The upper-mounted device 40 is connected to the upper-mounted device port 116 of the high-voltage distribution box 10. The vehicle controller 50 is connected to one side of the communication interface 115 of the high-voltage distribution box 10; the first interface 145 and the second interface 147 of the relay 14 are connected to the other side of the communication interface 115, respectively, so that the relay 14 can receive the instructions sent by the vehicle controller 50 to control the closing and opening of the relay, thereby controlling the power-on and / or power-off of the upper-mounted device 40, and using the power battery system of the pure electric special vehicle to supply power to the MCU and the upper-mounted device at the same time.

[0074] The utility model discloses a high-voltage distribution box is added between the power battery and MCU, and a high-voltage output is led out in the high-voltage distribution box, so that the MCU is supplied with power, and the external high-power electrical equipment is supplied with power. Thus, the external high-power electrical equipment is supplied with power in the most convenient and economic way without changing the original vehicle high-voltage system architecture.

[0075] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the utility model, and they are not used to limit the protection scope of the utility model. Any equivalent implementation scheme or change made without departing from the spirit of the utility model, such as the combination, division or repetition of features, should be included in the protection scope of the utility model.

Claims

1. A high-voltage distribution box (10), which is connected to the vehicle battery (20) and is used to provide power to the MCU (30) and the upper equipment (40), characterized in that: The high-voltage distribution box (10) comprises a housing (11) and a positive conductor (12), a negative conductor (13) and a relay (14) contained in the housing (11), wherein: The side wall of the housing (11) has: a battery positive electrode connection port (111), such that a first lead (60) connected to the positive electrode of the battery (20) passes through the battery positive electrode connection port (111) and is connected to the positive electrode conductor (12); a battery negative electrode connection port (112), so that a second lead (70) connected to the negative electrode of the battery (20) passes through the battery negative electrode connection port (112) and is connected to the negative electrode conductor (13); an MCU positive electrode connection port (113), such that a third wire (80) connected to the positive electrode of the MCU (30) passes through the MCU positive electrode connection port (113) and is connected to the positive electrode conductor (12); an MCU negative electrode connection port (114), such that a fourth wire (90) connected to the negative electrode of the MCU (30) passes through the MCU negative electrode connection port (114) and is connected to the negative electrode conductor (13); and A bodywork device port (116) for connecting a bodywork device (40) and having: a power positive terminal (117), one end of which is connected to the positive conductor (12) and the other end of which is connected to the positive terminal of the upper device (40); and a power negative terminal (118), one end of which is connected to the negative terminal of the upper mounting device (40); The relay (14) has: an input terminal (141) connected to the negative conductor (13); and An output terminal (143) is connected to the other end of the power negative terminal (118) of the upper equipment port (116).

2. The high-voltage distribution box (10) according to claim 1, characterized in that: Also includes: A fuse (15) is housed in the housing (11) and comprises: a first terminal (151) connected to the negative conductor (13), and A second terminal (153) is connected to the input terminal (141) of the relay (14).

3. The high-voltage distribution box (10) according to claim 2, characterized in that: The side wall of the housing (11) further comprises a communication interface (115) for connecting to a vehicle controller (50) of the vehicle. The relay (14) further comprises a first interface (145) and a second interface (147). The first interface (145) and the second interface (147) are respectively connected to the communication interface (115), so that the relay (14) can receive instructions sent by the vehicle controller (50).

4. The high-voltage distribution box (10) according to claim 3, characterized in that: The positive conductor (12) has: a positive conductor body (121), a first connecting member (123), one end of which is fixedly connected to the positive conductor body (121) and the other end of which is connected to the first lead (60), thereby connecting the positive conductor (12) to the positive electrode of the battery (20); and a second connecting member (125), one end of which is fixedly connected to the positive electrode conductor body (121) and the other end of which is connected to the third wire (80); The positive power connection terminal (117) of the upper equipment port (116) is connected to the first connector (123) / the second connector (125) via a wire; The negative electrode conductor (13) has: a negative conductor body (131), a third connecting member (133), one end of which is fixedly connected to the negative conductor body (131) and the other end of which is connected to the second lead (70), thereby connecting the negative conductor (13) to the negative electrode of the battery (20), and a fourth connecting member (135), one end of which is fixedly connected to the negative electrode conductor body (131) and the other end of which is connected to the fourth lead (90); The input terminal (141) of the relay (14) is connected to the third connecting member (133) / the fourth connecting member (135) via a wire.

5. The high-voltage distribution box (10) according to claim 4, characterized in that: The high-voltage distribution box (10) further comprises a first support body (16), a second support body (17) and a third support body (18) fixed to the bottom wall of the shell (11); the positive conductor (12) has a positive fixing hole (127); the positive conductor body (121) is fixed to the first support body (16) via the positive fixing hole (127) to support the positive conductor (12); the negative conductor (13) also has a negative fixing hole (137); the negative conductor body (131) is fixed to the second support body (17) via the negative fixing hole (137) to support the negative conductor (13); the first terminal (151) of the fuse (15) is fixedly connected to the negative conductor body (131) via the negative fixing hole (137); and the second terminal (153) of the fuse (15) is fixedly connected to the third support body (18).

6. The high-voltage distribution box (10) according to claim 5, characterized in that: The upper-mounted device port (116) has a pair of high-voltage interlock wires (119) which form a loop with the plug-in detection wire of the upper-mounted device (40) to detect whether the upper-mounted device (40) is plugged in properly, and if not, a prompt is issued.

7. A vehicle, characterized in that include: The high-voltage distribution box (10) according to any one of claims 1 to 6; A battery (20), the positive and negative electrodes of which are connected to the positive conductor (12) and the negative conductor (13) of the high-voltage distribution box (10) via the battery positive electrode connection port (111) and the battery negative electrode connection port (112) of the high-voltage distribution box (10), respectively; The MCU (30) has a positive and negative electrode connected to the positive conductor (12) and the negative conductor (13) of the high-voltage distribution box (10) through the MCU positive electrode connection port (113) and the MCU negative electrode connection port (114) of the high-voltage distribution box (10), respectively; An upper-mounted device (40) connected to an upper-mounted device port (116) of the high-voltage distribution box (10); and A vehicle controller (50) is connected to one side of the communication interface (115) of the high-voltage distribution box (10); the first interface (145) and the second interface (147) of the relay (14) are respectively connected to the other side of the communication interface (115), so that the relay (14) can receive instructions sent by the vehicle controller (50) to control the closing and opening of the relay (14), thereby controlling the power on and / or power off of the upper-mounted device (40).

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