CN110103723B - Circuit system of new energy pure electric multifunctional special vehicle and control method thereof - Google Patents
Circuit system of new energy pure electric multifunctional special vehicle and control method thereof Download PDFInfo
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- CN110103723B CN110103723B CN201910394079.3A CN201910394079A CN110103723B CN 110103723 B CN110103723 B CN 110103723B CN 201910394079 A CN201910394079 A CN 201910394079A CN 110103723 B CN110103723 B CN 110103723B
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
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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
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
Abstract
The invention discloses a circuit system of a new energy pure electric multifunctional special vehicle and a control method thereof, wherein the circuit system comprises a power supply device and a control device, the power supply device comprises a power battery system, a distribution box, running electrical equipment, a low-voltage power supply and a power frequency power supply, a pre-charging circuit and a pre-charging relay are arranged in the distribution box, and a main positive relay, a running relay and a power frequency relay are also arranged in the distribution box; the control device comprises a mode selector, a vehicle control unit, an internal power supply manager, a running controller and an external power supply manager, wherein the mode selector is a single-pole multi-position self-locking switch and comprises a public end and an external power supply access end, and the public end is communicated with one of the running mode end, the intelligent mode end, the full-energy mode end or the emergency stop mode end. According to the invention, the vehicle can select a row working mode according to the actual working condition, and the power supply is switched on after the pre-charging is finished, so that the self-locking function is added, and the power consumption requirements of a low-voltage power supply, a power frequency power supply and power battery equipment are met.
Description
Technical Field
The invention relates to the technical field of new energy electric vehicles, in particular to a circuit system of a new energy pure electric multifunctional special vehicle and a control method thereof.
Background
In the manufacturing industry of multifunctional special vehicles, the exhaust emission of fuel oil type automobiles causes serious pollution to air, China has become the first producing country and consuming country of most functional special vehicles in the world at present, the multifunctional special vehicles are produced in a fuel oil type, and the exhaust emission is an important component of an air pollution source, so that the popularization of the multifunctional special vehicles using new energy sources is urgent.
Besides the basic vehicle running function, the multifunctional special vehicle also comprises other intelligent additional functions, such as a mobile police service command vehicle, and besides the running function, the vehicle also comprises a face recognition ratio peer-to-peer monitoring function, a mobile office function, an emergency security inspection function, a real-time communication function, an unmanned aerial vehicle reconnaissance function, an emergency power supply function and the like. The new energy pure electric multifunctional special vehicle carries a power battery system, not only provides power for vehicle running, but also provides a working power supply for intelligent additional function electrical equipment. The existing pure electric vehicle with new energy has the following defects:
(1) the electrical equipment part for realizing the intelligent additional function works by depending on a power frequency power supply, and the part works by depending on a vehicle-mounted low-voltage storage battery, so that a large amount of electric energy is consumed. The multifunctional special vehicle generally has three working modes: the first mode is a pure driving function mode, namely, the vehicle only realizes the driving function, and other intelligent additional functions do not need to be realized; the second is an intelligent additional function mode, the vehicle does not move for a long time, does not need to run, and only needs to realize the intelligent additional function; the third is a full-function mode, and the vehicle can realize a running function and other intelligent additional functions. The energy consumed by different working modes is different, but the carried electric quantity is not infinite, the working capacity and the endurance mileage can not be guaranteed, the energy of the power battery system can not be saved, and the requirement for realizing intelligent additional functions can not be met by utilizing an external power supply.
(2) The electric equipment of the new energy pure electric multifunctional special vehicle is provided with a plurality of inverter circuits, the inverter circuits can be electrified after full pre-charging, the control is completed through complicated instruction exchange, the power supply switching can not be realized through simple control of on-off of a relay, a complicated pre-charging circuit and a communication protocol are required to be arranged to ensure the work safety, and no reliable circuit control method can meet the selection requirements of different working modes at present.
In view of this, it is urgently needed to improve a power supply system and a circuit control method of an existing new energy pure electric vehicle, so as to facilitate operation, meet power supply requirements under different working modes, and ensure a cruising mileage.
Disclosure of Invention
The invention aims to solve the technical problems that the existing power supply system and circuit control method of the new-energy pure electric vehicle cannot meet the power supply requirement and has short endurance mileage.
In order to solve the technical problems, the technical scheme adopted by the invention is to provide a circuit system of a new energy pure electric multifunctional special vehicle, which comprises the following components:
the power supply device comprises a power battery system, a distribution box, running electrical equipment, a low-voltage power supply and a power frequency power supply, wherein a pre-charging relay for controlling the on-off of the pre-charging relay and a pre-charging relay for controlling the on-off of the pre-charging relay are arranged in the distribution box;
the control device comprises a mode selector, a vehicle control unit, an internal power supply manager, a running controller and an external power supply manager, wherein the mode selector is a single-pole multi-position self-locking switch and comprises a public end and an external power supply access end, and the public end is conducted with one of a running mode end, an intelligent mode end, a full-energy mode end or an emergency stop mode end so as to enter a running mode, an intelligent mode, a full-energy mode or an emergency stop mode; the vehicle control unit is used for controlling the distribution box in a driving mode, an intelligent mode or an all-round mode, so that the internal power controller and the driving controller are operated or disconnected, further the driving electrical equipment, the low-voltage power supply and the power frequency power supply are in an operating state or a disconnected state, and the external power frequency manager is used for accessing an external power supply in an emergency parking mode or sending a parking instruction to the vehicle control unit after accessing the external power supply.
In another preferred embodiment, the low-voltage power supply comprises a DC/DC low-voltage power supply charger and a low-voltage battery, and the DC/DC low-voltage power supply charger converts the direct-current electric energy of the power battery system into low-voltage direct-current electric energy to supply to the low-voltage battery.
In another preferred embodiment, the power frequency power supply comprises a DC/AC power frequency power inverter and an AC/DC low-voltage power charger, the DC/AC power frequency power inverter converts direct current of the power battery system into alternating current, and the AC/DC low-voltage power charger converts power frequency alternating current electric energy into low-voltage direct current electric energy to supply to the low-voltage storage battery.
In another preferred embodiment, a charging pile interface is arranged on the distribution box, a charging pile relay is arranged in the distribution box, and the charging pile relay is used for controlling the on-off of the charging pile and the power battery system.
In another preferred embodiment, the vehicle control unit is connected with an accelerator pedal and a gear shift switch in the vehicle.
In another preferred embodiment, the control device further comprises an external power supply starting switch and an external power supply closing switch, the external power supply manager comprises a parking relay and an external power supply relay, the parking relay is used for controlling the total positive relay, the pre-charging relay, the traveling relay and the power frequency relay of the distribution box to be disconnected, and the external power supply relay comprises a normally open power frequency power supply contact, a normally closed power frequency inversion contact, a normally open low-voltage contact and a normally open total contact.
The invention also provides a control method of the circuit system of the new energy pure electric multifunctional special vehicle, which comprises the following steps:
before the vehicle starting switch is not closed, operating a mode selector to select a working mode:
the method comprises the following steps that a driving mode is conducted, a common end of a mode selector is conducted with a driving mode end, the mode selector sends a signal of the driving mode to a vehicle control unit, the vehicle control unit is electrified and sends a command to an internal power supply manager, a pre-charging relay and a driving relay in a power distribution box are closed, the driving electrical equipment and a low-voltage power supply are pre-charged, the pre-charging relay is disconnected after pre-charging is completed, a main positive relay is closed, the driving electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, a vehicle achieves a driving function, and meanwhile the low-voltage power supply supplements electric energy;
or in an intelligent mode, a public end of a mode selector is communicated with an intelligent mode end, the mode selector sends a signal of the intelligent mode to a vehicle controller, the vehicle controller is electrified and sends a command to an internal power manager, a pre-charging relay and a power frequency relay in a power distribution box are closed, a power frequency power supply and a low-voltage power supply are pre-charged, the pre-charging relay is opened after pre-charging is completed, a main positive relay is closed, the power frequency electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, the vehicle realizes an intelligent additional function of supporting the power frequency power supply and the low-voltage power supply, and meanwhile, the low-voltage power supply supplements electric energy;
or in an all-round mode, a public end of a mode selector is communicated with an all-round mode end, the mode selector sends a signal of the all-round mode to a vehicle controller, the vehicle controller is electrified and sends an instruction to an internal power supply manager, a pre-charging relay, a running relay and a power frequency relay in a power distribution box are closed, running electrical equipment, a power frequency power supply and a low-voltage power supply are pre-charged, the pre-charging relay is opened after pre-charging is completed, a total positive relay is closed, the running electrical equipment, the power frequency electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, the vehicle realizes an intelligent additional function of running function, power frequency power supply and low-voltage power supply support, and meanwhile, the low-voltage power supply supplements electric energy;
or an emergency stop mode, the public end of the mode selector is communicated with the emergency stop mode end, the mode selector sends a signal of the emergency stop mode to the vehicle controller, and the vehicle enters the stop mode;
or an external power supply access mode, when the external power supply access end of the mode selector is accessed to an external power supply, the vehicle enters a parking mode, the external power supply supplies power for the low-voltage power supply and the power-frequency power supply, the vehicle realizes the intelligent additional function of supporting the power-frequency power supply and the low-voltage power supply, and meanwhile, the low-voltage power supply supplements electric energy;
in a running mode, an intelligent mode and a full-function mode, after a vehicle starting switch is closed, a mode selector is self-locked, mode switching can not be carried out any more, and when a working mode needs to be selected again, the vehicle starting switch is switched off after parking and flameout, and then the working mode is selected.
In another preferred embodiment, the control device further includes an external power supply start switch and an external power supply off switch, the external power supply manager includes a parking relay and an external power supply relay, the external power supply relay includes a normally open power frequency power supply contact, a normally closed power frequency inverter contact, a normally open low-voltage contact and a normally open total contact, and in the external power supply access mode, the specific steps are as follows:
after an external power supply is connected, the parking relay is closed, the vehicle control unit sends a parking instruction to the internal power supply manager to control the main positive relay, the pre-charging relay, the driving relay and the power frequency relay of the distribution box to be disconnected, and the power battery system does not provide electric energy any more;
the external power supply starting switch is pressed, the normally open power frequency power supply contact, the normally open low-voltage contact and the normally open main contact are closed, the intelligent additional function of supporting the low-voltage power supply and the power frequency power supply is realized, the normally closed power frequency inversion contact is opened, and the external power supply is not connected with the inversion circuit of the power frequency power supply;
and when the external power supply closing switch is pressed down, the normally open power frequency power supply contact, the normally open low-voltage contact and the normally open main contact are disconnected, the normally closed power frequency inversion contact is closed, and the external power supply is disconnected.
In another preferred embodiment, the low-voltage power supply comprises a DC/DC low-voltage power supply charger and a low-voltage storage battery, and in the driving mode, the intelligent mode and the full-function mode, the power battery system pre-charges the DC/DC low-voltage power supply charger during pre-charging.
In another preferred embodiment, the power frequency power supply comprises a DC/AC power frequency power supply inverter and an AC/DC low-voltage power supply charger, and in the intelligent mode and the all-round mode, the power battery system performs pre-charging on the DC/AC power frequency power supply inverter during pre-charging.
Compared with the prior art, the intelligent power supply system has the advantages that 4 optional working modes are arranged when an external power supply is not accessed, a vehicle can select a running mode, an intelligent mode, an all-round mode and an emergency stop mode according to actual working conditions, the electric energy of a power battery system can be saved to the maximum extent by the vehicle, the best working and cruising ability can be guaranteed, the external power supply can be accessed after the vehicle stops, the external power supply can be accessed to work intelligent additional function electrical equipment when the vehicle stops for a long time in a fixed place to execute a special task, and the energy of the power battery system is not consumed; most of electrical equipment on the new-energy pure electric multifunctional special vehicle is provided with an inverter circuit, the inverter circuit is a capacitive load, a large current can be generated when the power supply is directly switched on, a circuit relay and the electrical equipment are easy to damage, the electrical equipment is precharged before being powered on in a driving mode, an intelligent mode and a full-function mode, and the power supply is switched on after the precharging is finished, so that safety and reliability are ensured; the self-locking function is set, after the working mode is selected, the vehicle starting switch is closed, the working mode selector can be self-locked, the mode selector can not be operated any more, the working mode switching can not be carried out any more, the danger caused by accidental switching of the working mode of the vehicle can be avoided, and the safety and reliability of the vehicle work can be ensured; the power supply can be provided for the electrical equipment which depends on the power battery system to work, the electrical equipment which depends on the low-voltage storage battery to work can be provided with the power supply, meanwhile, the electrical equipment which depends on the power frequency power supply to work can be provided with the power supply, and the power consumption requirements of different functional equipment are met.
Drawings
FIG. 1 is a schematic diagram of a mode selector of the present invention.
Fig. 2 is an electrical schematic of the present invention.
FIG. 3 is a schematic diagram of the mode selector and the vehicle control unit according to the present invention.
Fig. 4 is an operation state diagram of the driving mode of the present invention.
Fig. 5 is a diagram of the operating state of the intelligent mode of the present invention.
Fig. 6 is a diagram of the working state of the full-function mode of the present invention.
Fig. 7 is an operation state diagram of the emergency stop mode of the present invention.
FIG. 8 is an electrical schematic of the external power manager of the present invention.
Detailed Description
The invention provides a circuit system of a new energy pure electric multifunctional special vehicle, which is described in detail below with reference to the accompanying drawings and the detailed description of the specification.
As shown in fig. 1 and fig. 2, the circuit system of the new-energy pure electric multifunctional special vehicle provided by the invention comprises a power supply device and a control device.
The power supply device comprises a power battery system, a distribution box, traveling electrical equipment, a low-voltage power supply and a power frequency power supply, wherein a pre-charging relay K2 for controlling the on-off of a pre-charging circuit and the pre-charging circuit is arranged in the distribution box, a main positive relay K1, a traveling relay K3 and a power frequency relay K4 are further arranged in the distribution box, the main positive relay K1 is used for controlling the on-off of the traveling electrical equipment and a main circuit of the low-voltage power supply and the power battery system, the traveling relay K3 is used for controlling the on-off of a shunt circuit of the traveling electrical equipment and the power battery system, and the power frequency relay K4 is used for controlling the on-off of the shunt circuit of the power frequency power supply and the power battery system.
The control device comprises a mode selector, a Vehicle Control Unit (VCU), an internal power manager (IBMS), a driving controller and an external power manager (OBMS), wherein, as shown in fig. 3, the mode selector is a single-pole multi-position self-locking switch, and comprises a public end a and an external power access end B, C, the public end a is conducted with one of a driving mode end 1, an intelligent mode end 2, a full-energy mode end 3 or an emergency stop mode end 4, so as to enter a driving mode, an intelligent mode, a full-energy mode or an emergency stop mode; the vehicle control unit is used for controlling the distribution box in a driving mode, an intelligent mode or an all-round mode, enabling the internal power supply controller and the driving controller to operate or be disconnected, further enabling the driving electrical equipment, the low-voltage power supply and the power frequency power supply to enter an operating state or a disconnected state, and the external power frequency manager is used for accessing the external power supply in an emergency stop mode or sending a stop instruction to the vehicle control unit after accessing the external power supply.
As shown in fig. 2, preferably, the low-voltage power supply includes a DC/DC low-voltage power supply charger and a low-voltage battery, and the DC/DC low-voltage power supply charger converts the direct-current electric energy of the power battery system into low-voltage direct-current electric energy to supply to the low-voltage battery.
Preferably, the power frequency power supply comprises a DC/AC power frequency power supply inverter and an AC/DC low-voltage power supply charger, the DC/AC power frequency power supply inverter converts direct current of the power battery system into alternating current, and the AC/DC low-voltage power supply charger converts power frequency alternating current electric energy into low-voltage direct current electric energy to supply to the low-voltage storage battery.
Preferably, be equipped with on the block terminal and fill electric pile interface, be equipped with in the block terminal and fill electric pile relay K5, fill electric pile relay K5 and be used for controlling the break-make that fills electric pile and power battery system.
Preferably, the vehicle control unit is connected with an accelerator pedal and a gear shifting switch in the vehicle, and is used for monitoring the running speed of the vehicle and ensuring that the output power is in a qualified range.
As shown in fig. 8, preferably, the control device further includes an external power supply starting switch SB2 and an external power supply closing switch SB1, the external power supply manager includes a parking relay K7 and an external power supply relay K6, the parking relay K7 is used for controlling a main positive relay K1, a pre-charging relay K2, a driving relay K3 and a power frequency relay K4 of the distribution box to be opened, and the external power supply relay K6 includes a normally open power frequency power supply contact K6-3, a normally open power frequency power supply contact K6-4, a normally open low-voltage contact K6-2 and a normally open main contact K6-1.
The invention also provides a control method of the circuit system of the new energy pure electric multifunctional special vehicle, which comprises the following steps:
before the vehicle starting switch is not closed, operating a mode selector to select a working mode:
a driving mode, as shown in fig. 4, a common terminal a of a mode selector is conducted with a driving mode terminal 1, the mode selector sends a signal of the driving mode to a vehicle controller, the vehicle controller is powered on, an instruction is sent to an internal power manager, a pre-charging relay K2 and a driving relay K3 in a distribution box are closed, driving electrical equipment and a low-voltage power supply are pre-charged, the pre-charging relay K2 is opened after pre-charging is completed, a general positive relay K1 is closed, the driving electrical equipment and the low-voltage power supply are connected to a power battery system, a vehicle starting switch is closed, a vehicle realizes a driving function, and the low-voltage power supply supplements electric energy;
or an intelligent mode, as shown in fig. 5, the common terminal a of the mode selector is conducted with the intelligent mode terminal 2, the mode selector sends a signal of the intelligent mode to the vehicle controller, the vehicle controller is powered on and sends an instruction to the internal power manager, the pre-charging relay K2 and the power frequency relay K4 in the distribution box are closed, the power frequency power supply and the low-voltage power supply are pre-charged, the pre-charging relay K2 is opened after pre-charging is completed, the main positive relay K1 is closed, the power frequency electrical equipment and the low-voltage power supply are connected to the power battery system, the vehicle starting switch is closed, the vehicle realizes an intelligent additional function of supporting the power frequency power supply and the low-voltage power supply, and the low-voltage power supply supplements electric energy;
or in an all-round mode, as shown in fig. 6, the common terminal a of the mode selector is connected with the all-round mode terminal 3, the mode selector sends a signal of the all-round mode to the vehicle controller, the vehicle controller is powered on and sends an instruction to the internal power manager, the pre-charging relay K2, the driving relay K3 and the power frequency relay K4 in the distribution box are closed, the driving electrical equipment, the power frequency power supply and the low-voltage power supply are pre-charged, the pre-charging relay K2 is disconnected after pre-charging is completed, the total positive relay K1 is closed, the driving electrical equipment, the power frequency electrical equipment and the low-voltage power supply are connected to the power battery system, the vehicle starting switch is closed, the vehicle realizes intelligent additional functions of driving, supporting of the power frequency power supply and the low-voltage power supply, and the low-voltage power supply supplements electric energy;
or an emergency stop mode, as shown in fig. 7, the public end a of the mode selector is conducted with the emergency stop mode end 4, the mode selector sends a signal of the emergency stop mode to the vehicle controller, and the vehicle enters the stop mode;
or an external power access mode, as shown in fig. 8, when the external power access end B, C of the mode selector is accessed to an external power, the vehicle enters a parking mode, the external power supplies power for the low-voltage power supply and the power-frequency power supply, the vehicle realizes the intelligent additional function supported by the power-frequency power supply and the low-voltage power supply, and the low-voltage power supply supplements electric energy;
in a running mode, an intelligent mode and a full-function mode, after a vehicle starting switch is closed, a mode selector is self-locked, mode switching can not be carried out any more, and when a working mode needs to be selected again, the vehicle starting switch is switched off after parking and flameout, and then the working mode is selected.
Further preferably, the control device further comprises an external power supply starting switch SB2 and an external power supply closing switch SB1, the external power supply manager comprises a parking relay K7 and an external power supply relay K6, the external power supply relay K6 comprises a normally open power frequency power supply contact K6-3, a normally open power frequency power supply contact K6-4, a normally open low-voltage contact K6-2 and a normally open total contact K6-1, and in the external power supply access mode, the specific steps are as follows:
after an external power supply is connected, the parking relay K7 is closed, the vehicle control unit sends a parking instruction to the internal power supply manager, the main positive relay K1, the pre-charging relay K2, the driving relay K3 and the power frequency relay K4 of the power distribution box are controlled to be disconnected, and the power battery system does not provide electric energy any more;
an external power supply starting switch SB2 is pressed, a normally open power frequency power supply contact K6-3, a normally open low-voltage contact K6-2 and a normally open total contact K6-1 are closed, the intelligent additional function of supporting a low-voltage power supply and a power frequency power supply is realized, the normally open power frequency power supply contact K6-4 is disconnected, and the external power supply is not connected with an inverter circuit of the power frequency power supply;
when an external power supply closing switch SB1 is pressed, a normally open power frequency power supply contact K6-3, a normally open low-voltage contact K6-2 and a normally open total contact K6-1 are disconnected, a normally open power frequency power supply contact K6-4 is closed, and the external power supply is disconnected.
Specifically, the low-voltage power supply comprises a DC/DC low-voltage power supply charger and a low-voltage storage battery, and in the running mode, the intelligent mode and the all-round mode, the power battery system pre-charges the DC/DC low-voltage power supply charger during pre-charging.
Specifically, the power frequency power supply comprises a DC/AC power frequency power supply inverter and an AC/DC low-voltage power supply charger, and in an intelligent mode and an all-round mode, the power battery system pre-charges the DC/AC power frequency power supply inverter during pre-charging.
The invention has 4 optional working modes, the vehicle can select a proper working mode according to the actual working condition, and the vehicle can save the electric energy of the power battery system to the maximum extent so as to ensure the best working and cruising ability.
For example, when a new energy pure electric multifunctional special vehicle needs to execute a special task from a place A to a place B, only the running function needs to be realized in the process from the place A to the place B, other intelligent additional functions do not need to be realized, at the moment, the vehicle can select the running mode, the running electrical equipment can be started to work, the power frequency power supply inverter irrelevant to the running function cannot work, the intelligent additional function electrical equipment working by the power frequency power supply cannot be started, and therefore electric energy is saved.
When the vehicle reaches a place B and needs to be stopped for a long time to execute a special task, the vehicle can select an intelligent mode, at the moment, the vehicle only can start a DC/DC low-voltage power supply charger and a power frequency power supply inverter, the intelligent additional function electrical equipment is guaranteed to work, the running electrical equipment cannot be started, a large amount of electric energy is saved, and the Motor Controller (MCU), the motor, the steering power-assisted controller, the braking equipment controller, the ABS system, the electric-drive heat dissipation cooler and the like can consume huge electric energy when working for a long time with the running electrical equipment, and the electric-drive heat dissipation cooler and the like are not required to be closed when working, so that the energy consumption is reduced.
Under some working conditions, the vehicle needs to run and exert intelligent additional functions, for example, the police service command vehicle needs to implement the intelligent additional functions in mobile detection and transmit signal data to a background in real time to keep cooperative command, and at the moment, an all-round mode can be selected, so that the vehicle can be ensured to realize the running function and the intelligent additional functions.
When the vehicle needs to be parked for a long time in a fixed place to execute a special task, the vehicle can select an emergency parking mode, then an external power supply is connected to supply the intelligent additional function electrical equipment to work, the electric energy of a power battery system is not consumed, the vehicle is in an emergency parking state in the emergency parking mode, the power supply of the power battery system is disconnected, and safe operation can be guaranteed.
In any working mode, as long as the vehicle is connected with the external power supply, the external power supply manager sends the parking signal instruction to the vehicle control unit, so that the vehicle is in a parking state, and the operation safety is further ensured.
According to the invention, when an external power supply is not accessed, 4 optional working modes are provided, a vehicle can select a running mode, an intelligent mode, an all-round mode and an emergency stop mode according to actual working conditions, the vehicle can save the electric energy of the power battery system to the maximum extent so as to ensure the best working and cruising ability, the external power supply can be accessed after the vehicle stops, and when a fixed place stops for a long time to execute a special task, the external power supply can be accessed to supply intelligent additional function electric equipment to work without consuming the energy of the power battery system; most of electrical equipment on the new-energy pure electric multifunctional special vehicle is provided with an inverter circuit, the inverter circuit is a capacitive load, a large current can be generated when the power supply is directly switched on, a circuit relay and the electrical equipment are easy to damage, the electrical equipment is precharged before being powered on in a driving mode, an intelligent mode and a full-function mode, and the power supply is switched on after the precharging is finished, so that safety and reliability are ensured; the self-locking function is set, after the working mode is selected, the vehicle starting switch is closed, the working mode selector can be self-locked, the mode selector can not be operated any more, the working mode switching can not be carried out any more, the danger caused by accidental switching of the working mode of the vehicle can be avoided, and the safety and reliability of the vehicle work can be ensured; the power supply can be provided for the electrical equipment which depends on the power battery system to work, the electrical equipment which depends on the low-voltage storage battery to work can be provided with the power supply, meanwhile, the electrical equipment which depends on the power frequency power supply to work can be provided with the power supply, and the power consumption requirements of different functional equipment are met.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (10)
1. The utility model provides a circuit system of multi-functional special type car of pure electric of new forms of energy which characterized in that includes:
the power supply device comprises a power battery system, a distribution box, running electrical equipment, a low-voltage power supply and a power frequency power supply, wherein a pre-charging relay for controlling the on-off of the pre-charging relay and a pre-charging relay for controlling the on-off of the pre-charging relay are arranged in the distribution box;
the control device comprises a mode selector, a vehicle control unit, an internal power supply manager, a running controller and an external power supply manager, wherein the mode selector is a single-pole multi-position self-locking switch and comprises a public end and an external power supply access end, and the public end is conducted with one of a running mode end, an intelligent mode end, a full-energy mode end or an emergency stop mode end so as to enter a running mode, an intelligent mode, a full-energy mode or an emergency stop mode; the vehicle control unit is used for controlling the distribution box in a driving mode, an intelligent mode or an all-round mode, so that the internal power supply manager and the driving controller are operated or disconnected, and further the driving electrical equipment, the low-voltage power supply and the power frequency power supply are in an operating state or a disconnected state, and the external power supply manager is used for connecting an external power supply in an emergency stop mode or sending a stop instruction to the vehicle control unit after the external power supply is connected;
the vehicle starting switch is closed, the vehicle realizes a running function, and the low-voltage power supply supplements electric energy;
or in an intelligent mode, a public end of a mode selector is communicated with an intelligent mode end, the mode selector sends a signal of the intelligent mode to a vehicle controller, the vehicle controller is electrified and sends a command to an internal power manager, a pre-charging relay and a power frequency relay in a power distribution box are closed, a power frequency power supply and a low-voltage power supply are pre-charged, the pre-charging relay is opened after pre-charging is completed, a main positive relay is closed, the power frequency electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, the vehicle realizes an intelligent additional function of supporting the power frequency power supply and the low-voltage power supply, and meanwhile, the low-voltage power supply supplements electric energy;
or in an all-round mode, a public end of a mode selector is communicated with an all-round mode end, the mode selector sends a signal of the all-round mode to a vehicle controller, the vehicle controller is electrified and sends an instruction to an internal power supply manager, a pre-charging relay, a running relay and a power frequency relay in a power distribution box are closed, running electrical equipment, a power frequency power supply and a low-voltage power supply are pre-charged, the pre-charging relay is opened after pre-charging is completed, a total positive relay is closed, the running electrical equipment, the power frequency electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, the vehicle realizes an intelligent additional function of running function, power frequency power supply and low-voltage power supply support, and meanwhile, the low-voltage power supply supplements electric energy;
or an emergency stop mode, the public end of the mode selector is communicated with the emergency stop mode end, the mode selector sends a signal of the emergency stop mode to the vehicle controller, and the vehicle enters the stop mode; or an external power supply access mode, when the external power supply access end of the mode selector is accessed to the external power supply, the vehicle enters a parking mode, the external power supply supplies power for the low-voltage power supply and the power-frequency power supply, the vehicle achieves the intelligent additional function supported by the power-frequency power supply and the low-voltage power supply, and meanwhile the low-voltage power supply supplements electric energy.
2. The circuit system of the new-energy battery electric multifunctional special vehicle as claimed in claim 1, wherein the low-voltage power supply comprises a DC/DC low-voltage power supply charger and a low-voltage battery, and the DC/DC low-voltage power supply charger converts the direct-current electric energy of the power battery system into low-voltage direct-current electric energy to supply to the low-voltage battery.
3. The circuit system of the new-energy pure electric multifunctional special vehicle as claimed in claim 2, wherein the power frequency power supply comprises a DC/AC power frequency power inverter and an AC/DC low-voltage power charger, the DC/AC power frequency power inverter converts direct current of the power battery system into alternating current, and the AC/DC low-voltage power charger converts power frequency alternating current electric energy into low-voltage direct current electric energy to supply to the low-voltage storage battery.
4. The circuit system of the new-energy pure electric multifunctional special vehicle as claimed in claim 1, wherein a charging pile interface is arranged on the distribution box, a charging pile relay is arranged in the distribution box, and the charging pile relay is used for controlling on-off of a charging pile and a power battery system.
5. The circuit system of the new-energy pure electric multifunctional special vehicle as claimed in claim 1, wherein the vehicle control unit is connected with an accelerator pedal and a shift switch in the vehicle.
6. The circuit system of a new-energy pure-electric multifunctional special vehicle as claimed in claim 1, wherein the control device further comprises an external power supply starting switch and an external power supply closing switch, the external power supply manager comprises a parking relay and an external power supply relay, the parking relay is used for controlling a main positive relay, a pre-charging relay, a traveling relay and a power frequency relay of the distribution box to be disconnected, and the external power supply relay comprises a normally-open power frequency power supply contact, a normally-closed power frequency inverter contact, a normally-open low-voltage contact and a normally-open main contact.
7. The control method of the circuit system of the new-energy pure electric multifunctional special vehicle as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
before the vehicle starting switch is not closed, operating a mode selector to select a working mode:
the method comprises the following steps that a driving mode is conducted, a common end of a mode selector is conducted with a driving mode end, the mode selector sends a signal of the driving mode to a vehicle control unit, the vehicle control unit is electrified and sends a command to an internal power supply manager, a pre-charging relay and a driving relay in a power distribution box are closed, the driving electrical equipment and a low-voltage power supply are pre-charged, the pre-charging relay is disconnected after pre-charging is completed, a main positive relay is closed, the driving electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, a vehicle achieves a driving function, and meanwhile the low-voltage power supply supplements electric energy;
or in an intelligent mode, a public end of a mode selector is communicated with an intelligent mode end, the mode selector sends a signal of the intelligent mode to a vehicle controller, the vehicle controller is electrified and sends a command to an internal power manager, a pre-charging relay and a power frequency relay in a power distribution box are closed, a power frequency power supply and a low-voltage power supply are pre-charged, the pre-charging relay is opened after pre-charging is completed, a main positive relay is closed, the power frequency electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, the vehicle realizes an intelligent additional function of supporting the power frequency power supply and the low-voltage power supply, and meanwhile, the low-voltage power supply supplements electric energy;
or in an all-round mode, a public end of a mode selector is communicated with an all-round mode end, the mode selector sends a signal of the all-round mode to a vehicle controller, the vehicle controller is electrified and sends an instruction to an internal power supply manager, a pre-charging relay, a running relay and a power frequency relay in a power distribution box are closed, running electrical equipment, a power frequency power supply and a low-voltage power supply are pre-charged, the pre-charging relay is opened after pre-charging is completed, a total positive relay is closed, the running electrical equipment, the power frequency electrical equipment and the low-voltage power supply are connected into a power battery system, a vehicle starting switch is closed, the vehicle realizes an intelligent additional function of running function, power frequency power supply and low-voltage power supply support, and meanwhile, the low-voltage power supply supplements electric energy;
or an emergency stop mode, the public end of the mode selector is communicated with the emergency stop mode end, the mode selector sends a signal of the emergency stop mode to the vehicle controller, and the vehicle enters the stop mode; or an external power supply access mode, when the external power supply access end of the mode selector is accessed to an external power supply, the vehicle enters a parking mode, the external power supply supplies power for the low-voltage power supply and the power-frequency power supply, the vehicle realizes the intelligent additional function of supporting the power-frequency power supply and the low-voltage power supply, and meanwhile, the low-voltage power supply supplements electric energy;
in a running mode, an intelligent mode and a full-function mode, after a vehicle starting switch is closed, a mode selector is self-locked, mode switching can not be carried out any more, and when a working mode needs to be selected again, the vehicle starting switch is switched off after parking and flameout, and then the working mode is selected.
8. The control method according to claim 7, wherein the control device further comprises an external power supply start switch and an external power supply stop switch, the external power supply manager comprises a parking relay and an external power supply relay, the external power supply relay comprises a normally open power frequency power supply contact, a normally closed power frequency inverter contact, a normally open low-voltage contact and a normally open total contact, and in the external power supply access mode, the specific steps are as follows:
after an external power supply is connected, the parking relay is closed, the vehicle control unit sends a parking instruction to the internal power supply manager to control the main positive relay, the pre-charging relay, the driving relay and the power frequency relay of the distribution box to be disconnected, and the power battery system does not provide electric energy any more;
the external power supply starting switch is pressed, the normally open power frequency power supply contact, the normally open low-voltage contact and the normally open main contact are closed, the intelligent additional function of supporting the low-voltage power supply and the power frequency power supply is realized, the normally closed power frequency inversion contact is opened, and the external power supply is not connected with the inversion circuit of the power frequency power supply;
and when the external power supply closing switch is pressed down, the normally open power frequency power supply contact, the normally open low-voltage contact and the normally open main contact are disconnected, the normally closed power frequency inversion contact is closed, and the external power supply is disconnected.
9. The control method according to claim 7, wherein the low-voltage power supply comprises a DC/DC low-voltage power supply charger and a low-voltage storage battery, and the power battery system performs pre-charging on the DC/DC low-voltage power supply charger during pre-charging in the driving mode, the intelligent mode and the all-round mode.
10. The control method of claim 7, wherein the power frequency power supply comprises a DC/AC power frequency power supply inverter and an AC/DC low-voltage power supply charger, and in the intelligent mode and the full-function mode, the power battery system pre-charges the DC/AC power frequency power supply inverter during pre-charging.
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