A control system of a new energy drainage vehicle water pump power supply device

Abstract

This application discloses a control system for a water pump power supply device in a new energy drainage vehicle, relating to the field of vehicle control. The system includes a low-voltage control circuit and a DC high-voltage circuit. The low-voltage control circuit includes: a chassis ON position, a first DC contactor, a second DC contactor, a first switch, a chassis communication interface, and a DC relay. The chassis ON position is connected to the first DC contactor. The first DC contactor is also connected to the first switch. The first switch is also connected to the second DC contactor, the chassis communication interface, and the DC relay. The DC high-voltage circuit includes: a chassis external discharge port, a step-down module, a DC circuit breaker module, and a water pump frequency converter module. The chassis external discharge port, the step-down module, and the DC circuit breaker module are respectively connected to the second DC contactor. The step-down module is also connected to the DC relay. The DC circuit breaker module is also connected to the water pump frequency converter module. This application can reduce noise and emission pollution.

Description

Technical Field

[0001] This application relates to the field of vehicle control, and in particular to a control system for a power supply device for a water pump in a new energy drainage vehicle. Background Technology

[0002] Currently, the control system of traditional drainage truck water pump power supply devices on the market mainly includes auxiliary diesel generator sets, frequency converters, relays, circuit breakers, indicator lights, emergency stop switches, rotary switches, and industrial sockets. The water pump is powered by diesel generator sets. The disadvantage of this method is that the diesel generator sets generate a lot of noise when they are working, around 86 decibels, and have high emissions pollution according to the National III emission standard. Summary of the Invention

[0003] The purpose of this application is to provide a control system for a power supply device for a water pump in a new energy drainage vehicle, which can reduce noise and emission pollution.

[0004] To achieve the above objectives, this application provides the following solution: This application provides a control system for a power supply device for a water pump in a new energy drainage vehicle, including: a low-voltage control circuit and a DC high-voltage circuit; The low-voltage control circuit includes: chassis ON position, first DC contactor, second DC contactor, first switch, chassis communication interface and DC relay; The chassis ON position is connected to the first DC contactor; the first DC contactor is also connected to the first switch; the first switch is also connected to the second DC contactor, the chassis communication interface, and the DC relay respectively; The DC high-voltage circuit includes: chassis external discharge port, step-down module, DC circuit breaker module and water pump frequency converter module; The chassis external discharge port, the step-down module, and the DC circuit breaker module are respectively connected to the second DC contactor; the step-down module is also connected to the DC relay; and the DC circuit breaker module is also connected to the water pump frequency converter module.

[0005] In one embodiment, the low-voltage control circuit further includes: a second switch; The second switch is connected to the first switch.

[0006] In one embodiment, the low-voltage control circuit further includes: a fuse; The fuse is connected to the second switch.

[0007] In one embodiment, the insurance is 5A insurance.

[0008] In one embodiment, the low-voltage control circuit further includes: a chassis battery; The chassis battery is connected to the fuse.

[0009] In one embodiment, the low-voltage control circuit further includes: a power generation status indicator light; The power generation status indicator light is connected to the DC relay.

[0010] In one embodiment, the power generation status indicator is a red-green dual-color indicator.

[0011] In one embodiment, the DC high-voltage circuit further includes: an external discharge power supply plug; The external discharge power plug is connected to the chassis external discharge port and the second DC contactor, respectively.

[0012] In one embodiment, the DC circuit breaker module includes: a first DC circuit breaker and a second DC circuit breaker; Both the first DC circuit breaker and the second DC circuit breaker are connected to the second DC contactor.

[0013] In one embodiment, the water pump frequency converter module includes: a first water pump frequency converter and a second water pump frequency converter; The first water pump frequency converter is connected to the first DC circuit breaker; the second water pump frequency converter is connected to the second DC circuit breaker.

[0014] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a control system for a water pump power supply device for a new energy drainage vehicle. High-voltage DC power is discharged from the external discharge port of the chassis. After passing through a second DC contactor and then through a step-down module, the high-voltage DC power is converted into low-voltage DC power. Finally, the DC circuit breaker module is used to power the water pump frequency converter module, thereby realizing the conversion of the high-voltage DC power provided by the hybrid chassis into frequency-adjustable three-phase AC power for the water pump function, thereby reducing noise and emission pollution. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments 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.

[0016] Figure 1 A schematic diagram of the low-voltage control circuit of the control system for the water pump power supply device of a new energy drainage vehicle; Figure 2 A schematic diagram of the high-voltage control circuit of the control system for the water pump power supply device of a new energy drainage vehicle.

[0017] Attached reference numerals: Chassis ON position start relay - KM, First DC contactor - KM1, Emergency stop switch - SB6, Self-locking rotary switch - SB7, Second DC contactor - KM4, DC relay - KM2, First DC circuit breaker - QF1, Second DC circuit breaker - QF2, First water pump frequency converter - 1, Second water pump frequency converter - 2, 5A fuse - 5A. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 and Figure 2 As shown, this application provides a control system for a power supply device for a water pump in a new energy drainage vehicle, including: a low-voltage control circuit and a DC high-voltage circuit.

[0021] The low-voltage control circuit includes: chassis ON position, first DC contactor KM1, second DC contactor KM4, first switch, chassis communication interface and DC relay KM2.

[0022] The chassis ON position is connected to the first DC contactor KM1; the first DC contactor KM1 is also connected to the first switch; the first switch is also connected to the second DC contactor KM4, the chassis communication interface, and the DC relay KM2. The chassis communication interface is a 12V chassis communication interface.

[0023] The DC high-voltage circuit includes: chassis external discharge port, step-down module, DC circuit breaker module and water pump frequency converter module.

[0024] The chassis external discharge port, the step-down module, and the DC circuit breaker module are respectively connected to the second DC contactor KM4; the step-down module is also connected to the DC relay KM2; and the DC circuit breaker module is also connected to the water pump frequency converter module. In the step-down module, L is the live wire, N is the neutral wire, both of which are input terminals of the step-down module; VO+ is the positive terminal, and VO- is the negative terminal, both of which are output terminals of the step-down module.

[0025] In one exemplary embodiment, the low-voltage control circuit further includes a second switch connected to the first switch. The first switch is a self-locking toggle switch SB7, and the second switch is an emergency stop switch SB6.

[0026] In practical applications, the low-voltage control circuit further includes a fuse; the fuse is connected to the second switch. The fuse is a 5A fuse.

[0027] The low-voltage control circuit also includes a chassis battery; the chassis battery is connected to the fuse. The chassis battery is a 12V chassis battery.

[0028] The low-voltage control circuit also includes a power generation status indicator light; the power generation status indicator light is connected to the DC relay KM2. The power generation status indicator light is a red-green dual-color indicator light.

[0029] In practical applications, the 12V chassis battery is connected to the normally open contact of the chassis ON position start relay KM. The normally open contact of the chassis ON position start relay KM is connected to the coil of the first DC contactor KM1. The 12V chassis battery is connected to the 5A fuse 5A. The 5A fuse 5A is connected to the emergency stop switch SB6. The emergency stop switch SB6 is connected to the self-locking rotary switch SB7. The self-locking rotary switch SB7 is connected to the coil of the second DC contactor KM4. The self-locking rotary switch SB7 is connected to the chassis 12V communication interface. The self-locking rotary switch SB7 is connected to the contact of the DC relay KM2. The contact of the DC relay KM2 is connected to the red and green dual-color indicator light.

[0030] The DC high-voltage circuit also includes an external discharge power plug; the external discharge power plug is connected to the chassis external discharge port and the second DC contactor KM4. The positive terminal of the external discharge power plug is connected to the self-locking rotary switch SB7 via line marker A31, and the negative terminal of the external discharge power plug is connected to the self-locking rotary switch SB7 via line marker A02.

[0031] The DC circuit breaker module includes: a first DC circuit breaker QF1 and a second DC circuit breaker QF2; both the first DC circuit breaker QF1 and the second DC circuit breaker QF2 are connected to the second DC contactor KM4.

[0032] The water pump frequency converter module includes: a first water pump frequency converter 1 and a second water pump frequency converter 2; the first water pump frequency converter 1 is connected to the first DC circuit breaker QF1; the second water pump frequency converter 2 is connected to the second DC circuit breaker QF2.

[0033] In practical applications, the chassis external discharge port is connected to the external discharge power plug, the external discharge power plug is connected to the second DC contactor KM4 contact, the second DC contactor KM4 contact is connected to the step-down module, the step-down module is connected to the DC relay KM2 coil, the second DC contactor KM4 contact is connected to the first DC circuit breaker QF1 and the second DC circuit breaker QF2 respectively, the first DC circuit breaker QF1 is connected to the first water pump frequency converter 1, and the second DC circuit breaker QF2 is connected to the second water pump frequency converter 2.

[0034] When the above system is executed, the following process is used to control the power supply to the water pump: When the chassis is started in the ON position, the chassis ON position start relay KM contacts close, energizing the coil of the first DC contactor KM1. KM1 contacts close, and the self-locking rotary switch SB7 is pressed, causing the red-green dual-color indicator light to illuminate red. After successful chassis communication, the chassis external discharge port releases high-voltage DC power, which passes through the contacts of the second DC contactor KM4 and then through the step-down module to convert the high-voltage DC power into DC 12V DC power. This power passes through the coil of the DC relay KM2, energizing the coil and closing the contacts of the DC relay KM2. The red-green dual-color indicator light illuminates green, and the contacts of the second DC contactor KM4 connect to the first DC circuit breaker QF1 and the second DC circuit breaker QF2. Closing the first DC circuit breaker QF1 and the second DC circuit breaker QF2 supplies power to the first water pump frequency converter 1 and the second water pump frequency converter 2, thereby achieving frequency conversion control of the water pump power supply.

[0035] To address the problems in the control system of traditional drainage vehicle water pump power supply devices, noise reduction is usually achieved by isolating the noise source, but the effect is not ideal. With the rapid development of new energy hybrid vehicles, a new water pump power supply technology has become applicable. This application utilizes a new energy hybrid chassis range extender (the chassis range extender generates electricity to the chassis external discharge interface) to replace the diesel generator set for powering the water pump. This system can convert the high-voltage DC power provided by the hybrid chassis into variable frequency adjustable three-phase AC power (which can be converted into three-phase AC power through the water pump frequency converter) to provide power to the water pump. The noise level is reduced to 72 decibels, and the emissions meet the China VI emission standard, which is an upgrade from the China III emission standard to the China VI standard, making it more environmentally friendly.

[0036] 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.

[0037] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A control system for a power supply device for a water pump in a new energy drainage vehicle, characterized in that, include: Low-voltage control circuit and DC high-voltage circuit; The low-voltage control circuit includes: chassis ON position, first DC contactor, second DC contactor, first switch, chassis communication interface and DC relay; The chassis ON position is connected to the first DC contactor; the first DC contactor is also connected to the first switch; the first switch is also connected to the second DC contactor, the chassis communication interface, and the DC relay respectively; The DC high-voltage circuit includes: chassis external discharge port, step-down module, DC circuit breaker module and water pump frequency converter module; The chassis external discharge port, the step-down module, and the DC circuit breaker module are respectively connected to the second DC contactor; the step-down module is also connected to the DC relay; and the DC circuit breaker module is also connected to the water pump frequency converter module.

2. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 1, characterized in that, The low-voltage control circuit also includes: a second switch; The second switch is connected to the first switch.

3. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 2, characterized in that, The low-voltage control circuit also includes: a fuse; The fuse is connected to the second switch.

4. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 3, characterized in that, The insurance mentioned is 5A insurance.

5. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 3, characterized in that, The low-voltage control circuit also includes: a chassis battery; The chassis battery is connected to the fuse.

6. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 1, characterized in that, The low-voltage control circuit also includes: a power generation status indicator light; The power generation status indicator light is connected to the DC relay.

7. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 6, characterized in that, The power generation status indicator is a red-green dual-color indicator.

8. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 1, characterized in that, The DC high-voltage circuit also includes: an external discharge power supply plug; The external discharge power plug is connected to the chassis external discharge port and the second DC contactor, respectively.

9. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 1, characterized in that, The DC circuit breaker module includes: a first DC circuit breaker and a second DC circuit breaker; Both the first DC circuit breaker and the second DC circuit breaker are connected to the second DC contactor.

10. The control system for the power supply device of the water pump in the new energy drainage vehicle according to claim 9, characterized in that, The water pump frequency converter module includes: a first water pump frequency converter and a second water pump frequency converter. The first water pump frequency converter is connected to the first DC circuit breaker; the second water pump frequency converter is connected to the second DC circuit breaker.

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