CN116760157B - Time-delay power-off circuit and special electric chassis vehicle - Google Patents
Time-delay power-off circuit and special electric chassis vehicle Download PDFInfo
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- CN116760157B CN116760157B CN202311064446.6A CN202311064446A CN116760157B CN 116760157 B CN116760157 B CN 116760157B CN 202311064446 A CN202311064446 A CN 202311064446A CN 116760157 B CN116760157 B CN 116760157B
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- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000003111 delayed effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000001815 facial effect Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/033—Details with several disconnections in a preferential order, e.g. following priority of the users, load repartition
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The application relates to the technical field of special electric chassis vehicles, in particular to a time-delay power-off circuit and a special electric chassis vehicle, which comprise the following components: the control circuit comprises a first control circuit and a second control circuit, the first power circuit is connected with the first control circuit and the second control circuit respectively and is used for providing low-voltage power supply for the first control circuit and the second control circuit, the first control circuit is connected with the second power circuit and is used for controlling on-off between the second power circuit and the second control circuit, the second control circuit is connected with the driving circuit and is used for opening and closing the driving circuit, and the second power circuit is connected with the second control circuit and is used for providing high-voltage power supply for the second control circuit. The application is beneficial to reducing the occurrence of the situation that the safety of the vehicle is affected by powering on and powering off the special vehicle with the electric chassis in a specific sequence.
Description
Technical Field
The application relates to the technical field of special electric chassis vehicles, in particular to a time-delay power-off circuit and a special electric chassis vehicle.
Background
The special vehicle with the electric chassis is generally a special vehicle refitting factory with legal qualification, and the two types of electric chassis are additionally provided with upper parts, so that the produced vehicle with special application functions, such as an environmental sanitation cleaning and sweeping vehicle, an environmental sanitation garbage truck and the like, can be used for solving the problem that the conventional special vehicle with the electric chassis is not provided with the legal qualification. The power on the special vehicle for the electric chassis is also electric generally, and the power is connected with a power supply from the chassis to realize the action of a power-driven loading mechanism, such as a motor drives a fan to realize vacuum suction or air heat dissipation, the motor drives a hydraulic oil pump to drive the hydraulic motor to realize the rotation of a winch or the rotation of a sweeping disc, and the motor drives a water pump to form high-pressure water cleaning or fire extinguishing and the like.
The special electric chassis vehicle is provided with a high-voltage power supply and a low-voltage power supply, the high-voltage power supply is generally direct current 336V or 540V, the low-voltage power supply is generally direct current 12V and 24V, when the special electric chassis vehicle works, the upper part is required to be electrified and powered off according to a specific sequence, and in actual operation, the electric chassis vehicle is easy to cause the damage of vehicle circuits because the electric chassis vehicle is not electrified and powered off according to the specific sequence, so that the safety of vehicles and human bodies is more seriously influenced.
Disclosure of Invention
The application provides a time-delay power-off circuit and an electric chassis special vehicle, which are beneficial to reducing the occurrence of the situation that the safety of the vehicle is affected because the electric chassis special vehicle is powered on and powered off in a specific sequence.
In a first aspect, the present application provides a delay power-off circuit, which adopts the following technical scheme:
a time-lapse power-down circuit comprising: the power supply circuit comprises a first power supply circuit and a second power supply circuit, the control circuit comprises a first control circuit and a second control circuit, the first power supply circuit is connected with the first control circuit and the second control circuit respectively and is used for providing low-voltage power supply for the first control circuit and the second control circuit, the first control circuit is connected with the second control circuit and is used for controlling the second control circuit, the first control circuit is connected with the second power supply circuit and is used for controlling the on-off between the second power supply circuit and the second control circuit, the second control circuit is connected with the driving circuit and is used for starting and stopping the driving circuit, and the second power supply circuit is connected with the second control circuit and is used for providing high-voltage power supply for the second control circuit;
the first power supply circuit (1) comprises a low-voltage power supply L, the positive electrode of the low-voltage power supply L is connected with one end of a first fuse FU1, the other end of the first fuse FU1 is connected with one end of a switch S1, the other end of the switch S1 is connected with the positive electrode of a first diode V1 and a first control circuit (3), the negative electrode of the first diode V1 is connected with the negative electrode of a second diode V2 and one end of a first relay K1, and the negative electrode of the second diode V2 is connected with the first control circuit (3); the first relay K1 is connected with the negative electrode of the first power supply L, one end of the second fuse FU2 and one end of the third fuse FU3, the other end of the second fuse FU2 is connected with the first control circuit (3), and the other end of the third fuse FU3 is connected with the second control circuit (4).
By adopting the technical scheme, when the power is needed, the first power circuit provides a low-voltage power supply for the first control circuit and the second control circuit, when the first control circuit and the second control circuit are electrified and conducted, the low-voltage power supply of the first control circuit and the second control circuit is completed, the first control circuit sends the power-on information to the second power circuit, and the second power circuit provides a high-voltage power supply for the second control circuit after receiving the power-on information, so that the power-on of the special vehicle for the electric chassis is completed; by arranging the first control circuit, the second power supply circuit can be controlled to conduct high-voltage power supply to the second control circuit only after the first control circuit is electrified at low voltage, so that the low-voltage power supply is firstly electrified in the process of uploading the electric chassis, and then the high-voltage power supply is conducted after the low-voltage power supply is completed, and the situation that the safety of the vehicle is influenced due to the fact that the electric chassis special vehicle is not electrified according to a specific sequence is reduced;
when power is required to be cut off, the first power supply circuit stops supplying power to the first control circuit and the second control circuit, the first control circuit sends query information to the second control circuit and receives feedback information of the second control circuit, so that whether the driving circuit stops running is judged, if the driving circuit stops running, the first control circuit sends power-off information to the second power supply circuit, the second power supply circuit is disconnected from the second control circuit after receiving the power-off information, the supply of high-voltage power to the second control circuit is stopped, and the power-off of the upper-mounted high-voltage power supply is completed; after the power-off of the upper mounting high-voltage power supply is completed, the first control circuit controls the first power supply circuit to carry out low-voltage power-off on the first control circuit and the second control circuit, so that the power-off of the upper mounting is completed;
if the driving circuit does not stop running, the first control circuit sends a power-off instruction to the second control circuit, the second control circuit breaks connection with the driving circuit according to the power-off instruction, so that the driving circuit stops running, meanwhile, the second control circuit detects whether the self high-voltage current drops into a safety threshold value or not, the current state is fed back to the first control circuit, when the self high-voltage current of the second control circuit drops into the safety threshold value, the first control circuit sends power-off information to the second power circuit, the second power circuit breaks connection with the second control circuit after receiving the power-off information, the second control circuit stops providing a high-voltage power supply for the second control circuit, and power-off of the upper high-voltage power supply is completed; after the power-off of the upper mounting high-voltage power supply is completed, the first control circuit controls the first power supply circuit to carry out low-voltage power-off on the first control circuit and the second control circuit, so that the power-off of the upper mounting is completed;
the method comprises the steps of setting a first control circuit and a second control circuit, judging whether the driving circuit stops running or not, if the driving circuit stops running, controlling a second power circuit to conduct high-voltage power-off on the second control circuit, and conducting low-voltage power-off on the first control circuit and the second control circuit only after the second control circuit is powered off at high voltage; if the driving circuit does not stop running, the second control circuit is controlled to power off the driving circuit, the high-voltage power of the second control circuit is enabled to be in a safety threshold range, the second power circuit is controlled to power off the second control circuit at high voltage, and only after the second control circuit is powered off at high voltage, the first control circuit and the second control circuit are powered off at low voltage, so that the power-off process of uploading is to power off the high-voltage power supply first, and then the power-off process of uploading is to power off at low voltage after the power-off of the high-voltage is completed, and the situation that the safety of a vehicle is affected due to the fact that the power-off of uploading of a special vehicle of an electric chassis is not carried out according to a specific sequence is reduced.
Optionally, the circuit of first control includes special-purpose vehicle facial make-up controller PLC, special-purpose vehicle facial make-up controller PLC includes input module, output module, first power positive pole, first power negative pole and first communication module, input module with the anodal of first diode is connected, output module with the anodal of second diode V2 is connected, first power anodal with the other end of second fuse is connected, first power negative pole with low-voltage power's negative pole is connected, first communication module is connected with second control circuit and second power circuit.
Through adopting above-mentioned technical scheme, realize through first communication module with second control circuit and second power supply circuit between the communication to help judging whether to satisfy the upper assembling and switch-on and switch-off requirement, and then help further strengthening the control to upper assembling and switch-off.
Optionally, the second control circuit includes a top-mounted motor controller MCU, the top-mounted motor controller MCU includes high-voltage anode, high-voltage cathode, second communication module, second power anode, second power cathode and drive control module, the second power anode with the other end of third fuse FU3 is connected, the second power cathode with the negative pole of low-voltage power supply is connected, the second communication module with first communication module and second power circuit are connected, the high-voltage anode with the high-voltage cathode respectively with second power circuit is connected, drive control module with drive circuit is connected.
Through adopting above-mentioned technical scheme, through second control circuit, realize driving circuit's control, simultaneously, second control circuit is connected with first control circuit, first power supply circuit and second power supply circuit to help according to first control circuit's control command, put on the vehicle according to the specific order to electric chassis special purpose, carry out the circular telegram and cut off.
Optionally, the driving control module includes a U port, a V port, and a W port, where the U port, the V port, and the W port are respectively connected to the driving circuit.
Optionally, the second power circuit includes a chassis PDU & BMS module, a third communication module and a chassis high-voltage battery module, the chassis PDU & BMS module is connected with the chassis high-voltage power Chi Baoxiang, the chassis PDU & BMS module is connected with the high-voltage anode and the high-voltage cathode.
By adopting the technical scheme, the second power supply circuit is used for providing a high-voltage power supply for the second control circuit.
Optionally, the driving circuit includes a motor M, where the motor M is connected to the U port, the V port, and the W port of the driving control module, respectively.
In a second aspect, the application also discloses a special vehicle for the electric chassis, which adopts the following technical scheme:
an electric chassis-specific vehicle comprising the time-lapse power-off circuit of the first aspect.
In summary, the application has the following beneficial technical effects:
when the first control circuit and the second control circuit are electrified, the first control circuit and the second control circuit complete low-voltage electrifying, the first control circuit sends electrifying information to the second power circuit, and the second power circuit provides high-voltage power for the second control circuit after receiving the electrifying information, so that the electrifying of the special vehicle for the electric chassis is completed; by arranging the first control circuit, the second power supply circuit can be controlled to conduct high-voltage power supply to the second control circuit only after the first control circuit is electrified at low voltage, so that the low-voltage power supply is firstly electrified in the process of uploading the electric chassis, and then the high-voltage power supply is conducted after the low-voltage power supply is completed, and the situation that the safety of the vehicle is influenced due to the fact that the electric chassis special vehicle is not electrified according to a specific sequence is reduced;
when power is required to be cut off, the first power supply circuit stops supplying power to the first control circuit and the second control circuit, the first control circuit sends query information to the second control circuit and receives feedback information of the second control circuit, so that whether the driving circuit stops running is judged, if the driving circuit stops running, the first control circuit sends power-off information to the second power supply circuit, the second power supply circuit is disconnected from the second control circuit after receiving the power-off information, the supply of high-voltage power to the second control circuit is stopped, and the power-off of the upper-mounted high-voltage power supply is completed; after the power-off of the upper mounting high-voltage power supply is completed, the first control circuit controls the first power supply circuit to carry out low-voltage power-off on the first control circuit and the second control circuit, so that the power-off of the upper mounting is completed;
if the driving circuit does not stop running, the first control circuit sends a power-off instruction to the second control circuit, the second control circuit breaks connection with the driving circuit according to the power-off instruction, so that the driving circuit stops running, meanwhile, the second control circuit detects whether the self high-voltage current drops into a safety threshold value or not, the current state is fed back to the first control circuit, when the self high-voltage current of the second control circuit drops into the safety threshold value, the first control circuit sends power-off information to the second power circuit, the second power circuit breaks connection with the second control circuit after receiving the power-off information, the second control circuit stops providing a high-voltage power supply for the second control circuit, and power-off of the upper high-voltage power supply is completed; after the power-off of the upper mounting high-voltage power supply is completed, the first control circuit controls the first power supply circuit to carry out low-voltage power-off on the first control circuit and the second control circuit, so that the power-off of the upper mounting is completed;
the method comprises the steps of setting a first control circuit and a second control circuit, judging whether the driving circuit stops running or not, if the driving circuit stops running, controlling a second power circuit to conduct high-voltage power-off on the second control circuit, and conducting low-voltage power-off on the first control circuit and the second control circuit only after the second control circuit is powered off at high voltage; if the driving circuit does not stop running, the second control circuit is controlled to power off the driving circuit, the high-voltage power of the second control circuit is enabled to be in a safety threshold range, the second power circuit is controlled to power off the second control circuit at high voltage, and only after the second control circuit is powered off at high voltage, the first control circuit and the second control circuit are powered off at low voltage, so that the power-off process of uploading is to power off the high-voltage power supply first, and then the power-off process of uploading is to power off at low voltage after the power-off of the high-voltage is completed, and the situation that the safety of a vehicle is affected due to the fact that the power-off of uploading of a special vehicle of an electric chassis is not carried out according to a specific sequence is reduced.
Drawings
FIG. 1 is a circuit block diagram of a delayed power down circuit according to an embodiment of the application.
Reference numerals illustrate:
1. a first power supply circuit; 2. a second power supply circuit; 3. a first control circuit; 4. a second control circuit; 5. and a driving circuit.
Detailed Description
In a first aspect, a time-lapse power-down circuit is disclosed.
The special electric chassis vehicle comprises a high-voltage power supply and a low-voltage power supply, and in order to reduce the situation that the safety of the vehicle is affected because the power on and the power off are not carried out on the special electric chassis vehicle in a specific sequence, the low-voltage power supply is required to be firstly electrified when the special electric chassis vehicle is electrified, and then the high-voltage power supply is electrified after the power on of the low-voltage power supply is completed; when the special vehicle for the electric chassis is powered on and off, the high-voltage power supply needs to be disconnected firstly, and then the high-voltage power supply is disconnected after the power failure of the high-voltage power supply is completed.
PDU (Power Distribution Unit), a high-voltage power distribution unit in a high-voltage system of a new energy vehicle.
BMS (Battery Management System) is a battery management system, a tie between the battery and the user.
The main object of BMS is secondary battery, and the purpose is to be able to improve the utilization ratio of battery, prevent that the battery from appearing overcharge and overdischarge, prolong the life of battery, monitor the state of battery.
Referring to fig. 1, a time-lapse power-off circuit includes a power supply circuit control circuit including a first power supply circuit 1 and a second power supply circuit 2, and a driving circuit 5 including a motor M, the control circuit including a first control circuit 3 and a second control circuit 4.
The first power supply circuit 1 includes a power supply L, a first fuse FU1, a switch S1, a first diode V1, a second diode V2, a first relay K1, a second fuse FU2, and a third fuse FU3.
The second power supply circuit 2 includes a chassis high-voltage battery pack, a chassis PDU & BMS module, and a third communication module.
The first control circuit 3 includes a special-purpose vehicle loading controller PLC, and the special-purpose vehicle loading controller PLC includes an input module, an output module, a first power anode, a first power cathode, and a first communication module, where IN this embodiment, the input module is an input port IN1, and the output module is an output port OUT1.
The second control module comprises a loading motor controller MCU, the loading motor controller MCU comprises a high-voltage anode, a high-voltage cathode, a second communication module, a second power anode, a second power cathode and a driving control module, and the driving control module comprises a U port, a V port and a W port.
The positive electrode of the power supply L is connected with one end of the first fuse FU1, the other end of the first fuse FU1 is connected with one end of the switch S1, the other end of the switch S1 is connected with the positive electrode of the first diode V1 and the input port IN1, and the negative electrode of the first diode V1 is connected with the negative electrode of the second diode V2 and the 1 end of the first relay K1; the positive electrode of the second diode V2 is connected with the output port OUT 1; the 2 end of the first relay K1 is connected with the negative electrode of the power supply L, the first power supply negative electrode and the second power supply negative electrode; the 3 end of the first relay K1 is connected with the positive electrode of the power supply L, the 4 end of the first relay K1 is connected with one end of the second fuse FU2 and one end of the third fuse FU3, and the other end of the second fuse FU2 is connected with the positive electrode of the first power supply; the other end of the third fuse FU3 is connected to the positive electrode of the second power supply.
The first communication module is connected with the second communication module and the third communication module respectively.
The positive pole V < 1+ > and the negative pole V < 1 > -of the chassis high-voltage battery pack are respectively connected with the chassis PDU & BMS module, the positive pole V < 2+ > of the chassis PDU & BMS is connected with the high-voltage positive pole V < + >, and the negative pole V < 2 > -of the chassis PDU & BMS is connected with the high-voltage negative pole V < - >; the U port, the V port and the W port of the drive control module are respectively connected with the motor M.
The implementation principle of the delay power-off circuit in the embodiment of the application is as follows: when the special chassis truck is electrified, the control switch S1 is closed, the high level 1L+ passes through the switch S1, the X1 is changed into the high level, the first diode V1 is changed into the high level KD, after the coil of the first relay K1 is electrified, the main contact of the first relay K1 is closed, after the high level passes through the fuse FU2, the first power supply positive pole VCC of the special upper controller PLC is powered on, until the special upper controller PLC is electrified, the special upper controller PLC starts to work, IN the operation logic of the special upper controller PLC, the input port IN1 can detect the state of the rear end X1 of the control switch S1, meanwhile, the output port OUT1 of the special upper controller PLC outputs the high level OT1, after the coil of the first relay K1 is electrified through the second diode V2, the OT1 is driven together with the switch S1, and the high level OT1 can always maintain the high level; at this time, the special chassis is charged with low voltage.
After the low-voltage electrifying of the special chassis truck is finished, the special chassis truck is provided with the special loading controller PLC which informs the chassis PDU and BMS module through the first communication module, high-voltage electricity can be supplied to the loading motor controller MCU, after the high-voltage electrifying of the loading motor controller MCU is finished, the special chassis truck is provided with the special loading controller PLC through the second communication module, the high-voltage electrifying is finished, and the special chassis truck is provided with the special loading controller PLC.
When the special chassis truck is assembled and de-energized, the control switch S1 is turned off, after the switch S1 is turned off, the X1 is de-energized, the input port IN1 of the special truck upper controller PLC can detect that the state of the rear end X1 of the switch S1 is changed, and the power is de-energized, at the moment, the output port OUT1 of the special truck upper controller PLC outputs a high level OT1, so that the coil of the first relay K1 is energized, and the main contact of the first relay K1 maintains a closed state. Meanwhile, the special vehicle uploading controller PLC and the special vehicle uploading motor controller MCU carry out CAN communication through the first communication module and the second communication module, whether the output of the motor M of the special vehicle uploading motor controller MCU is stopped is inquired, if the output of the motor M is stopped, the special vehicle uploading motor controller MCU informs the special vehicle uploading controller that the PLC motor M is stopped, the state is safe, at the moment, the special vehicle uploading controller PLC CAN carry out CAN communication with the third communication module through the first communication module, the chassis PDU (power unit) and BMS (battery management system) module is informed, the contactor of a main power supply CAN be immediately disconnected, and the power failure of the special chassis vehicle high-voltage power supply is completed.
After the high-voltage power-off of the special chassis truck is finished, the special truck loading controller PLC then changes the output OT1 of the output port OUT1 into low level, the coil of the first relay K1 is powered off, the main contact of the first relay K1 is disconnected, the power is lost at the position 2L+, the first power supply positive pole VCC of the special truck loading controller PLC is also powered off, the special truck loading controller PLC stops running, and the special truck loading motor controller MCU stops running; in the power-off process, as the motor M does not run, the process of stopping the motor M does not exist, the special vehicle uploading controller PCL informs the chassis PDU & BMS module through CAN communication, and the high-voltage power supply V+ is immediately disconnected, so that the power-off of the special chassis vehicle is completed; from the disconnection of the switch S1 to the loss of power to the first relay K1 coil, the power supply 2l+ is lost, which takes a short time.
If the output of the motor M is not stopped, the special vehicle loading controller PLC sends an instruction to the special vehicle loading motor controller MCU, the motor M immediately stops running, when the motor M stops, and the special vehicle loading motor controller MCU detects that the internal high-voltage current has fallen below a safety threshold, the special vehicle loading motor controller MCU informs the special vehicle loading controller PLC that the motor M has stopped, the state is safe, the special vehicle loading controller PLC informs a chassis PDU & BMS module through CAN communication at the moment, the contactor of a main power supply CAN be disconnected, the special vehicle loading controller PLC subsequently changes the output port OUT1 into low level, the coil of the first relay K1 is powered off, the main contact of the first relay K1 is disconnected, the power supply 2L+ is powered off, the first power supply VCC of the special vehicle loading controller PLC is powered off, the special vehicle loading controller PLC stops running, and the special chassis is powered off.
The power-off process is long in time consumption, and due to the fact that the motor M stops running, the time length of delayed power-off is the time when the motor controller MCU is mounted on a special vehicle to detect that the internal high-voltage current falls to a safety threshold, when the high-voltage current falls to the safety threshold, the high-voltage power supply is firstly disconnected, then the low-voltage power supply is turned off, the time length of delayed power-off is long when the high-voltage current falls to the high-voltage power supply in the motor controller MCU is mounted on the special vehicle, and otherwise, the time length of delayed power-off is long when the high-voltage current falls to the high-voltage power supply in the motor controller MCU is mounted on the special vehicle is short.
In a second aspect, the application also discloses a special vehicle for the electric chassis, which adopts the following technical scheme:
a special electric chassis vehicle comprises the time-delay power-off circuit in the embodiment.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. A time-lapse power-down circuit, comprising:
the power supply circuit comprises a first power supply circuit (1) and a second power supply circuit (2), wherein the control circuit comprises a first control circuit (3) and a second control circuit (4), the first power supply circuit (1) is respectively connected with the first control circuit (3) and the second control circuit (4) and is used for providing low-voltage power supply for the first control circuit (3) and the second control circuit (4), the first control circuit (3) is connected with the second control circuit (4) and is used for controlling the second control circuit (4), the first control circuit (3) is connected with the second power supply circuit (2) and is used for controlling the on-off state between the second power supply circuit (2) and the second control circuit (4), the second control circuit (4) is connected with the drive circuit (5) and is used for starting and stopping the drive circuit (5), and the second power supply circuit (2) is connected with the second control circuit (4) and is used for providing high-voltage power supply for the second control circuit (4).
The first power supply circuit (1) comprises a low-voltage power supply L, the positive electrode of the low-voltage power supply L is connected with one end of a first fuse FU1, the other end of the first fuse FU1 is connected with one end of a switch S1, the other end of the switch S1 is connected with the positive electrode of a first diode V1 and a first control circuit (3), the negative electrode of the first diode V1 is connected with the negative electrode of a second diode V2 and one end of a first relay K1, and the positive electrode of the second diode V2 is connected with the first control circuit (3); the first relay K1 is connected with the negative electrode of the first power supply L, one end of the second fuse FU2 and one end of the third fuse FU3, the other end of the second fuse FU2 is connected with the first control circuit (3), and the other end of the third fuse FU3 is connected with the second control circuit (4).
2. A time-lapse power-down circuit as claimed in claim 1, wherein: the first control circuit comprises a special vehicle upper-mounting controller PLC, the special vehicle upper-mounting controller PLC comprises an input module, an output module, a first power supply anode, a first power supply cathode and a first communication module, the input module is connected with the anode of the first diode, the output module is connected with the anode of the second diode V2, the first power supply anode is connected with the other end of the second fuse FU2, the first power supply cathode is connected with the cathode of the low-voltage power supply, and the first communication module is connected with the second control circuit (4) and the second power supply circuit (2).
3. A time-lapse power-down circuit as claimed in claim 2, wherein: the second control circuit (4) comprises a top-mounted motor controller MCU, the top-mounted motor controller MCU comprises a high-voltage anode, a high-voltage cathode, a second communication module, a second power anode, a second power cathode and a driving control module, the second power anode is connected with the other end of the third fuse FU3, the second power cathode is connected with the cathode of the low-voltage power supply, the second communication module is connected with the first communication module and the second power circuit (2), the high-voltage anode and the high-voltage cathode are respectively connected with the second power circuit (2), and the driving control module is connected with the driving circuit (5).
4. A time-lapse power-down circuit as claimed in claim 3, wherein: the driving control module comprises a U port, a V port and a W port, and the U port, the V port and the W port are respectively connected with the driving circuit (5).
5. A time-lapse power-down circuit as claimed in claim 3, wherein: the second power supply circuit (2) comprises a chassis PDU (power distribution unit) and BMS (battery management system) module, a third communication module and a chassis high-voltage battery module, wherein the chassis PDU and BMS module is connected with a chassis high-voltage power supply Chi Baoxiang, and the chassis PDU and BMS module are connected with a high-voltage anode and a high-voltage cathode.
6. The time-lapse power-down circuit of claim 4, wherein: the driving circuit (5) comprises a motor M, and the motor M is respectively connected with the U port, the V port and the W port of the driving control module.
7. An electric chassis-specific vehicle characterized by comprising the time-lapse power-off circuit as claimed in any one of claims 1 to 6.
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| CN202311064446.6A CN116760157B (en) | 2023-08-23 | 2023-08-23 | Time-delay power-off circuit and special electric chassis vehicle |
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