Plug-in box type vehicle-mounted high-voltage distribution box

Abstract

The utility model discloses a plug-in box type vehicle-mounted high-voltage distribution box. Comprising a bottom plate, a left side plate, a circuit breaker, a fuse side cover plate, a right side plate, input and output connectors ND1X1-ND1X17, a fuse, a test connector socket ND1X18, a front panel, a panel indicating lamp, a toggle switch, a rear panel, an arc extinguishing module, a three-phase alternating current contactor, a bus bar, a fuse mounting seat, a fuse mounting bracket, a high-voltage direct current contactor, an electromagnetic relay, an insulation resistance monitor and the like. The device is provided with two paths of three-phase alternating-current 380V power distribution, five paths of direct-current 520V power distribution and five paths of direct-current 24V power distribution output channels, an arc extinguishing module is additionally arranged between contacts of an alternating-current contactor, and an insulation resistance monitor is additionally arranged on a direct-current 520V power distribution bus; a circuit breaker, a fuse and a fuse side cover plate are arranged, so that power supply can be recovered in time and the fuse can be quickly replaced when overcurrent or overload occurs; the device can be compatible with a plurality of electric energy input sources, is convenient to maintain, is high in electrical safety, and is provided with a toggle switch in which a local control mode and a remote control mode coexist.

Description

Technical Field

[0001] The utility model relates to the field of mobile vehicle-mounted power distribution, in particular to a multi-input source high-voltage power distribution box with the characteristics of fast plug-in replacement, fast spare parts maintenance and online safety monitoring. Background Art

[0002] The power input source of the vehicle-mounted power distribution system is mostly a chassis power take-off generator or a vehicle-mounted diesel generator. The output voltage fluctuates widely, and overcurrent tripping or overload fusing often occurs. It is time-consuming and laborious to open the box to replace spare parts. If an emergency task is being performed when a failure occurs, it will greatly affect work efficiency and security performance. Therefore, it is extremely necessary to design a vehicle-mounted distribution box that can be quickly interchanged and maintained with spare parts; and most large-scale vehicle-mounted electrical equipment that performs tasks is high-voltage equipment. In order to avoid electric shock to operators or degradation of product performance due to equipment leakage, an insulation resistance monitor is installed in the distribution box to detect insulation safety problems in real time and take safety protection measures in advance. The utility model solves these problems and designs a vehicle-mounted high-voltage power distribution equipment with high safety and quick maintenance and replacement of spare parts. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a vehicle-mounted high-voltage distribution box with the characteristics of online monitoring of insulation resistance, quick plug-in and replacement, and on-board spare parts maintenance. To solve the above problems, the utility model is implemented through the following technical solutions:

[0004] A plug-in type vehicle-mounted high-voltage distribution box comprises: a bottom plate, a left side plate, a circuit breaker QF3, a circuit breaker QF4, a circuit breaker QF9, a fuse side cover plate, a handle, a cover plate, a right side plate, input and output connectors ND1X1-ND1X17, a fuse, a test connector socket ND1X18, a circuit breaker QF1, a front panel, a panel indicator light, a button switch, a rear panel, an arc extinguishing module, a three-phase AC contactor, a bus bar, a fuse mounting seat, a fuse mounting bracket, a high-voltage DC contactor 1, a high-voltage DC contactor 2, an electromagnetic relay, an insulation resistance monitor, a wiring harness clamp, a transfer bar 1, a transfer bar 2, and a locking screw.

[0005] The three-phase four-pole circuit breakers QF3, QF4 and the DC single-phase circuit breaker QF9 are installed on the left side panel, which can conveniently perform fault reset when overcurrent tripping occurs in the three-phase AC input circuit or the low-voltage DC control circuit.

[0006] 800V / 30A fuses QF5 and QF6, 800V / 20A fuses QF2, QF7, QF8, QF10 and AC 380V / 70A circuit breaker QF1 are installed on the left and right sides of the front panel respectively. When an overload or short circuit fault occurs in the high-voltage DC power distribution, the fuses can be blown in time to protect the downstream equipment, and spare parts can be quickly replaced without opening the box after a fault occurs. Circuit breaker QF1 is used to protect the three-phase AC bus power supply.

[0007] The front panel is also equipped with test points for the output voltage of each channel, which can be used to quickly test whether the output of each channel is normal without disassembling the machine. It is very convenient and efficient for pre-operation detection and troubleshooting.

[0008] The front panel is also equipped with a control mode conversion switch, which can switch between local control and remote control mode (remote signal input interface).

[0009] The circuit principle of the utility model is shown in the attached Figure 8 As shown, the three-phase AC contactor is equipped with an arc extinguishing module to increase the contact load capacity.

[0010] The utility model has the following beneficial effects:

[0011] 1. Multiple power input sources: The utility model is compatible with multiple power input sources, which can improve the convenience and safety fault tolerance of the distribution box for multi-scenario applications. The on-board high-voltage distribution box also has four power supply modes: chassis power take-off generator power supply, on-board diesel generator power supply, 380V AC mains power supply and high-voltage DC battery power supply. It can adapt to power supply during motoring, diesel generator power supply when stationary, 380V AC mains external input power supply and on-board battery emergency power supply.

[0012] 2. Convenient maintenance features: The utility model takes the maintainability of the distribution box into consideration and adopts a plug-in box structure design. A fuse is set on the front panel for short-circuit protection, and a circuit breaker is set on the right side panel for overcurrent / overload protection. In the event of a short-circuit fault, the fuse can be quickly replaced without disassembling the machine, and the circuit breaker can be quickly reset;

[0013] 3. High electrical safety: To prevent equipment leakage and injury, the utility model is equipped with an insulation resistance monitor to dynamically monitor the insulation resistance between the high-voltage power supply and the casing in real time. The insulation resistance monitor can give a light warning and a CAN bus alarm signal when the insulation of the chassis drops significantly.

[0014] 4. Local control mode and remote control mode coexist. You can either perform local operation through a single-machine button switch or switch to remote control mode for remote power distribution on the center console in the cab. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are incorporated into and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Attached Figure 1 ~Attached Figure 3 , Attachment Figure 5 A schematic diagram of the appearance and structure of the vehicle-mounted high-voltage distribution box provided by the utility model;

[0017] Attached Figure 4 A schematic diagram of the internal structure of the vehicle-mounted high-voltage distribution box provided by the utility model;

[0018] Attached Figure 6 This is a structural schematic diagram of the fuse bracket part 1 of the utility model;

[0019] Attached Figure 7 This is a structural schematic diagram of the second part of the fuse bracket of the utility model;

[0020] Attached Figure 8 The power distribution control circuit principle of the vehicle-mounted high-voltage distribution box provided by the utility model;

[0021] Description of reference numerals: 1- bottom plate, 2- left side plate, 3- circuit breaker QF3, 4- circuit breaker QF4, 5- circuit breaker QF9, 6- fuse side cover plate, 7- handle, 8- cover plate, 9- right side plate, 10- input and output connectors ND1X1 to ND1X17, 10.1- ND1X1 AC power input interface, 10.2- ND1X2 520V high-voltage DC input interface, 10.7-ND1X7 remote control mode interface, 10.8-ND1X8 emergency power supply distribution board interface, 10.14-ND1X14 CAN bus interface, 10.15-ND1X15 charging interface, 11-fuse, 12-test connector socket ND1X18, 13-circuit breaker QF1, 14-front panel, 15-panel indicator light, 16-button switch, 17-rear panel, 18-arc extinguishing module, 19-three-phase AC contactor, 20-bus bar, 21-fuse bracket part 1, 22-fuse Part 2 of the contactor bracket, 23-high-voltage DC contactor 1, 24-high-voltage DC contactor 2, 25-electromagnetic relay, 26-insulation resistance monitor, 27-wiring harness clamp, 28-adapter bar 1, 29-adapter bar 2, 30-locking screw, 31-locating pin, 32-fuse QF2, 33.1-fuse QF7, 33.2-fuse QF8, 34-fuse QF10, 35-insulating plate 1, 36-fuse bracket 1, 37.1-fuse QF5, 37.2-fuse QF6, 38-insulating plate 2, 39-fuse bracket 2.

[0022] The input and output connectors ND1X1~ND1X17 in this patent can be used for multiple functions, and only the interfaces related to the technical solution in this utility model are shown here. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0024] As attached Figure 1 ~Attached Figure 7As shown, the input and output connectors ND1X1~ND1X17 10 and the positioning pin 31 are fixed to the rear panel 17 by screws to form the rear panel part; the circuit breaker QF33, the circuit breaker QF44, and the circuit breaker QF55 are fixed to the left side plate 2 by screws to form the left side plate part; the K1~K4 electromagnetic relays 25 and the insulation resistance monitor 26 are fixed to the right side plate 9 by a cross slot pan head screw assembly to form the right side plate part; the fuse side cover 6, the handle 7, the fuse 11, the test connector socket ND1X18 12, the circuit breaker QF1 13, the panel indicator light 15, and the button switch 16 are installed on the front panel 14 by a screw assembly to form the front panel part; the fuse QF2 32, the fuse QF7 33.1 and the fuse QF8 33.2, the fuse QF1034, and the insulating plate 135 are installed on the fuse holder 1 by a screw assembly 36 to form a fuse holder part 1 21; fuse QF5 37.1 and fuse QF6 37.2, insulating plate 2 38 are installed on fuse holder 2 39 by screw assembly to form fuse holder part 22; three-phase AC contactor 19, arc extinguishing module 18, bus bar 20, high-voltage DC contactor 1 23, high-voltage DC contactor 2 24, fuse holder part 1 21, fuse holder part 22, harness clamp 27, adapter row 1 28, adapter row 29 are installed on bottom plate 1 by screw assembly to form bottom plate part; finally, rear panel part, left side panel part, right side panel part, front panel part and cover plate 8 are assembled by locking screws 30 to form plug-in type vehicle-mounted high-voltage distribution box described in the utility model.

[0025] The circuit principle involved in this utility model is as shown in the attached Figure 8 As shown, ND1X1 is the AC power input interface. The three-phase AC power is protected by the four-pole circuit breaker QF1 and then controlled by the three-phase AC contactor KM1 to output to the emergency power supply distribution board ND1X8 and the charging interface ND1X15. To prevent damage to the equipment due to load overload or short circuit, the emergency power supply distribution board branch and the charging output branch are respectively equipped with fuses QF3 and QF4 for tripping protection. In addition, the AC power supply can also provide working power for the reactor through the KM2 contactor.

[0026] ND1X2 is a 520V high-voltage DC input interface. After being protected by a fuse, the high-voltage DC power supply is controlled and output to various electrical equipment by high-voltage DC contactors KM3~KM5. In order to prevent high-voltage DC leakage from injuring people and the decrease of positive and negative insulation from causing equipment abnormalities, the utility model connects an insulation resistance monitor between the positive and negative poles of the 520V high-voltage DC power supply to monitor its insulation resistance in real time, and uploads it to the center console of the cab through the CAN bus of the ND1X14 interface.

[0027] The toggle switches S1~S6 cooperate with the electromagnetic relays K1~K4 to realize the switching between the local control mode and the remote control mode (ND1X7 interface is used for remote signal input) of the three-phase AC power supply and the high-voltage DC power supply.

[0028] ND1X18 is a panel test socket, used for maintenance mode inspection and testing. Standard parts, easy to purchase and replace, small spring force, easy to connect and disassemble, easy to process and replace the connector.

[0029] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Any modification or equivalent substitution made to the technical solution of the utility model by ordinary technicians in this field shall be included in the scope of the claims of the utility model as long as it does not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A plug-in type vehicle-mounted high-voltage distribution box, comprising a bottom plate (1), a left side plate (2), a right side plate (9), a front panel (14), a rear panel (17) and a cover plate (8); wherein a circuit breaker QF3 (3), a circuit breaker QF4 (4) and a circuit breaker QF5 (5) are fixed to the left side plate (2) by screws to form a left side plate portion; and a K1-K4 electromagnetic relay (25) and an insulation resistance monitor (26) are fixed to the right side plate (9) by a cross-slot pan head screw assembly to form a right side plate portion. ; The fuse side cover (6), handle (7), fuse (11), test connector socket ND1X18 (12), circuit breaker QF1 (13), panel indicator lights H1 to H5 (15), and toggle switch (16) are mounted on the front panel (14) by means of screw assemblies to form the front panel portion; the input and output connectors ND1X1 to ND1X17 (10) and the positioning pins (31) are fixed on the rear panel (17) by means of screws to form the rear panel portion; the fuse QF2 (3 2) fuse QF7 (33.1) and fuse QF8 (33.2), fuse QF10 (34) and insulating plate 1 (35) are mounted on fuse holder 1 (36) by screw assembly to form fuse holder part 1 (21); fuse QF5 (37.1) and fuse QF6 (37.2) and insulating plate 2 (38) are mounted on fuse holder 2 (39) by screw assembly to form fuse holder part 2 (22); three-phase AC contactor (19) , an arc extinguishing module (18), a bus bar (20), a high-voltage direct current contactor 1 (23), a high-voltage direct current contactor 2 (24), a fuse holder part 1 (21), a fuse holder part 2 (22), a harness clamp (27), a transfer row 1 (28), and a transfer row 2 (29) are mounted on a bottom plate (1) by means of a screw assembly to form a bottom plate part; a rear panel part, a left side panel part, a right side panel part, a front panel part, and a cover plate (8) are assembled by means of locking screws (30); the characteristics are as follows: ND1X1 (10.1) is the AC power input interface. The three-phase AC power is protected by the four-pole circuit breaker QF1 (1) and then controlled by the three-phase AC contactor to be output to the emergency power supply distribution board ND1X8 (10.8) and the charging interface ND1X15 (10.15). To prevent damage to the equipment due to load overload or short circuit, the emergency power supply distribution board branch and the charging output branch are respectively equipped with fuses QF3 (3) and QF4 (4) for tripping protection. ND1X2 (10.2) is the high-voltage DC input interface. The high-voltage DC power is protected by fuses QF5 (37.1) and fuse QF6 (37.2) and then controlled by the high-voltage DC contactor to be output to various electrical equipment.

2. The plug-in type vehicle-mounted high-voltage distribution box according to claim 1 is characterized in that: The insulation resistance monitor (26) is connected between the positive and negative electrodes of the high-voltage DC power supply to monitor the insulation resistance in real time, and the insulation resistance is uploaded to the central console of the cab through the CAN bus interface of ND1X14 (10.14).

3. The plug-in type vehicle-mounted high-voltage distribution box according to claim 1 is characterized in that: The distribution box is provided with a button switch (16) for switching between local control mode and remote control mode, and remote automatic power distribution is realized through the remote control mode interface of ND1X7 (10.7).

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