CN115366682A - Power supply method and device for electric vehicle and electric vehicle - Google Patents

Power supply method and device for electric vehicle and electric vehicle Download PDF

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Publication number
CN115366682A
CN115366682A CN202211117883.5A CN202211117883A CN115366682A CN 115366682 A CN115366682 A CN 115366682A CN 202211117883 A CN202211117883 A CN 202211117883A CN 115366682 A CN115366682 A CN 115366682A
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China
Prior art keywords
voltage
charging
battery pack
equipment
electric vehicle
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CN202211117883.5A
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Chinese (zh)
Inventor
王锐
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Hunan Xingbida Netlink Technology Co Ltd
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Hunan Xingbida Netlink Technology Co Ltd
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Priority to CN202211117883.5A priority Critical patent/CN115366682A/en
Publication of CN115366682A publication Critical patent/CN115366682A/en
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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
    • 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
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to the field of electric vehicles, and provides a power supply method and device for an electric vehicle and the electric vehicle, wherein the method comprises the following steps: acquiring an operation signal of the electric vehicle; generating a first control instruction based on the operation signal, and sending the first control instruction to the corresponding first switch device; the first control instruction is used for controlling the connection or disconnection of a first switching device, and the connection or disconnection of the first switching device is used for controlling the connection or disconnection of the power battery pack and a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is larger than a preset voltage, a voltage conversion device is arranged in part or all of the power supply loops and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is smaller than or equal to the preset voltage. The invention can effectively improve the charging efficiency while ensuring the reliability and the comprehensive cost of the electric vehicle.

Description

Power supply method and device for electric vehicle and electric vehicle
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a power supply method and device for an electric vehicle and the electric vehicle.
Background
With the continuous upgrading of the environmental protection requirement and the emission requirement, the purchase cost of the fuel vehicle is continuously increased, and the use and maintenance cost of a user is also continuously increased. The user needs a transportation tool which can meet the requirements of environmental protection and emission, and is economical and efficient. An electric vehicle is one of products that meet the above needs of customers.
However, "slow charging" is a core pain point for purely electric vehicles. At present, the charging speed is increased and the charging time is shortened by increasing the charging current or changing the battery. However, the electric quantity of the pure electric vehicle is large, the charging current at present reaches the receiving current (400 amperes) of the current national standard charging pile, the increase of the charging current does not greatly contribute to the shortening of the charging time, the charging current at present reaches the limit current (400 amperes) of the natural cooling of a charging system, the liquid cooling mode is adopted for further increasing the charging current, and the cost is greatly increased. In addition, due to the high power conversion cost and the large construction investment of the power conversion station, the adoption of the power conversion mode can cause the great increase of the cost.
Disclosure of Invention
The invention provides a power supply method and device for an electric vehicle and the electric vehicle, aiming at the problems in the prior art.
The invention provides a power supply method of an electric vehicle, which comprises the following steps:
acquiring an operation signal of the electric vehicle;
generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
According to the power supply method of the electric vehicle provided by the invention, the electric equipment comprises low-voltage equipment;
the voltage platform of the low-voltage equipment is less than or equal to the preset voltage, the power supply loop corresponding to the low-voltage equipment is provided with the voltage conversion device, and the output voltage of the voltage conversion device is the same as the voltage platform of the low-voltage equipment.
According to the power supply method of the electric vehicle, the electric equipment further comprises high-voltage equipment;
the voltage platform of the high-voltage equipment is the same as that of the power battery pack, and the power supply loop corresponding to the high-voltage equipment is not provided with the voltage conversion device.
According to the power supply method of the electric vehicle provided by the invention, the power battery pack is charged through the following steps:
when communication connection with the charging equipment is determined, a charging request instruction is sent to the charging equipment; the charging request instruction comprises a charging request voltage corresponding to the power battery pack;
receiving a voltage to be charged fed back by the charging equipment;
when the voltage to be charged is determined to be consistent with the charging request voltage, generating a second control instruction, and sending the second control instruction to a charging control switch; the second control instruction is used for controlling the charging control switch to be closed, and the closing or opening of the charging control switch is used for controlling the connection or disconnection of a charging loop of the power battery pack.
According to the power supply method of the electric vehicle provided by the invention, the method further comprises the following steps:
sending a detection instruction to each of the first switching devices and/or the charging control switches;
determining a fault detection result of the first switching device and/or the charge control switch based on a feedback signal of the first switching device and/or the charge control switch.
According to the power supply method of the electric vehicle provided by the present invention, the generating a first control command based on the operation signal and transmitting the first control command to the corresponding first switching device includes:
when the fact that the electric equipment needs to be precharged is determined, generating a precharge command based on the operation signal, and sending the precharge command to a second switching device of a precharge circuit of the electric equipment, wherein the precharge command is used for controlling the second switching device to be closed; wherein the closing or opening of the second switching device is used for controlling the connection or disconnection of the pre-charging circuit;
when the pre-charging of the electricity utilization equipment is determined to be completed, a pre-charging ending instruction and the first control instruction are generated, the pre-charging ending instruction is sent to the second switch device, the first control instruction is sent to the corresponding first switch device, and the pre-charging ending instruction is used for controlling the second switch device to be disconnected.
The present invention also provides a power supply apparatus for an electric vehicle, including:
the data acquisition module is used for acquiring an operation signal of the electric vehicle;
the computing module is used for generating a first control instruction based on the operation signal and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
The present invention also provides an electric vehicle including: the device comprises a power battery pack, electric equipment, a first switching device, a voltage conversion device and a control device;
the control device is used for acquiring an operation signal of the electric vehicle; the first switch device is also used for generating a first control instruction based on the operation signal and sending the first control instruction to the corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the closing or opening of the first switching device is used for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment;
the voltage platform of the power battery pack is greater than the preset voltage;
the voltage conversion device is arranged in part or all of the power supply loop, the voltage conversion device is used for converting the output voltage of the power battery pack and then supplying power to the corresponding electric equipment, and the output voltage of the voltage conversion device is smaller than or equal to the preset voltage.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor implements the method for powering an electric vehicle as described in any of the above when executing the program.
The present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of powering an electric vehicle as recited in any of the above.
According to the power supply method and device for the electric vehicle and the electric vehicle, the operation signal of the electric vehicle is obtained, the first control instruction is generated based on the operation signal and is sent to the corresponding first switch device to control the first switch device to be switched on or switched off, the power battery pack is controlled to supply power to the corresponding electric equipment or stop supplying power through the switching on or switching off of the first switch device, and normal and stable work of the electric vehicle can be effectively guaranteed; meanwhile, the voltage platform of the power battery pack is larger than the preset voltage, and the voltage conversion device is arranged in part or all of the power supply loops, so that the output voltage of the power battery pack is reduced to be smaller than or equal to the preset voltage through the voltage conversion device to supply power for corresponding electric equipment, and the charging efficiency can be effectively improved while the reliability and the comprehensive cost of the electric vehicle are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram of a method for powering an electric vehicle provided by the present invention;
fig. 2 is a schematic structural view of a power supply apparatus of an electric vehicle provided by the present invention;
FIG. 3 is a schematic view of an electric vehicle according to the present invention;
fig. 4 is one of the schematic structural diagrams of the power supply system of the electric traction vehicle provided by the invention;
fig. 5 is a second schematic structural diagram of a power supply system of the electric tractor provided by the invention;
fig. 6 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The power supply method of the electric vehicle of the invention is described below with reference to fig. 1. The power supply method of the electric vehicle of the invention is executed by electronic equipment such as a control device or hardware and/or software therein. The control device may be a control device of the electric vehicle itself, such as a BMS (Battery Management System) controller, or may be a newly added control device. As shown in fig. 1, the power supply method of the electric vehicle of the present invention includes:
s101, acquiring an operation signal of the electric vehicle.
Specifically, the electric vehicle is a vehicle using a power battery as an energy source, such as an electric passenger vehicle, an electric commercial vehicle and the like, and the electric commercial vehicle is an electric tractor, an electric heavy truck and the like. The operation signal of the electric vehicle, that is, a signal input by a user through a manipulation part of the electric vehicle, for example, a high voltage power-on request signal, a travel request signal, a water cooling on signal, a water warming on signal, a battery pack heating request signal, an air conditioner on signal, and the like.
S102, generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
Specifically, the specific manner of generating the first control instruction based on the operation signal may be set according to actual requirements, for example, the vehicle self-inspection may be performed after the operation signal is received, and the corresponding first control instruction is generated after it is determined that there is no abnormality; or after receiving the operation signal, pre-charging the electric equipment according to the requirement of the electric equipment, and generating a corresponding first control instruction after the pre-charging is finished; the corresponding first control instruction can also be directly generated after the operation signal is received.
The power battery pack of the electric vehicle is used for supplying power to electric equipment of the electric vehicle, the first switch device is arranged in a power supply loop of the power battery pack and the corresponding electric equipment and used for controlling connection or disconnection of the corresponding power supply loop, the power supply loop is connected, the power battery pack supplies power to the corresponding electric equipment, the power supply loop is disconnected, and the power battery pack stops supplying power to the corresponding electric equipment.
The voltage platform of the power battery pack is larger than the preset voltage, and the specific value of the preset voltage can be set according to actual requirements. As an alternative embodiment, the preset voltage may be set according to a voltage platform commonly used in electric vehicles on the market, for example, set to 600 volts; the voltage platform of the power battery pack is larger than the preset voltage, for example, 800 volts or higher can be set, the charging power of the power battery pack can be effectively improved, the charging time of the electric vehicle is further shortened, and the charging efficiency of the electric vehicle is improved.
In the power supply loop corresponding to each electric device, a voltage conversion device is arranged in part or all of the power supply loops, and the voltage conversion device is used for converting the output voltage of the power battery pack and then supplying power to the corresponding electric device. Wherein, voltage conversion equipment's output voltage is less than or equal to and predetermines the voltage, promptly, the voltage platform of the consumer that supplies power through voltage conversion equipment's output voltage can adopt the mature equipment of volume production that is less than or equal to 600 volt voltage platforms for consumer's reliability is high, and the comprehensive cost obtains effectively reducing, thereby can guarantee electric vehicle's reliability and comprehensive cost when improving charge efficiency. The voltage conversion device may adopt a dc-dc (Direct Current to Direct Current) voltage converter to convert the 800 v output voltage of the power battery pack into the power supply voltage of the corresponding electric device. Experiments prove that when the voltage platform of the power battery pack is increased from 600 volts to 800 volts of the conventional electric vehicle, the charging time can be shortened by more than 20%.
In addition, in the power supply process, the control device can also obtain the discharge current of the corresponding power battery pack so as to prevent the damage of the abnormal discharge current to the corresponding electric equipment.
In the traditional method, a charging current is increased or a battery is replaced to increase the charging speed and shorten the charging time. However, the electric quantity of the pure electric vehicle is large, the current charging current reaches the current receiving current (400 amperes) of the current national standard charging pile, the contribution of charging current increase to the shortening of the charging time is small, the current charging current reaches the limit current (400 amperes) of the natural cooling of the charging system, the liquid cooling mode is adopted for further increasing the charging current, and the cost is greatly increased. In addition, due to the fact that the battery replacement cost is high and the construction investment of the battery replacement station is large, the cost is greatly increased by adopting the battery replacement mode.
According to the embodiment of the invention, the operation signal of the electric vehicle is obtained, the first control instruction is generated based on the operation signal and is sent to the corresponding first switch device to control the on/off of the first switch device, and the power battery pack is controlled to supply power or stop supplying power to the corresponding electric equipment through the on/off of the first switch device, so that the normal and stable work of the electric vehicle can be effectively ensured; meanwhile, the voltage platform of the power battery pack is larger than the preset voltage, and the voltage conversion device is arranged in part or all of the power supply loops, so that the output voltage of the power battery pack is reduced to be smaller than or equal to the preset voltage through the voltage conversion device to supply power for corresponding electric equipment, and the charging efficiency can be effectively improved while the reliability and the comprehensive cost of the electric vehicle are ensured.
Based on the above embodiment, the electric device includes a low voltage device;
the voltage platform of the low-voltage equipment is less than or equal to the preset voltage, the power supply loop corresponding to the low-voltage equipment is provided with the voltage conversion device, and the output voltage of the voltage conversion device is the same as the voltage platform of the low-voltage equipment.
Specifically, the voltage platform of the low-voltage device is less than or equal to a preset voltage, for example, less than or equal to 600 volts, that is, the low-voltage device may adopt a mass production mature device with a voltage platform less than or equal to 600 volts, so that the low-voltage device has high reliability and low comprehensive cost.
And a voltage conversion device is arranged in a power supply loop corresponding to the low-voltage equipment so as to reduce the output voltage of the power battery pack to a voltage platform of the corresponding low-voltage equipment and supply power to the low-voltage equipment, thereby ensuring the normal and stable work of the low-voltage equipment.
It will be appreciated that the voltage platforms of the low voltage devices may be the same or different. The voltage platforms of the low-voltage devices are the same, for example, all are 600 volts, and a voltage conversion device may be provided to supply power to the low-voltage devices through the output voltage of the voltage conversion device, for example, the 800 volt output voltage of the power battery pack is converted into 600 volts through a DCDC voltage converter converting 800 volts into 600 volts to supply power to the low-voltage devices. When the voltage platforms of the low-voltage devices are different, a plurality of voltage conversion devices can be arranged, and the different voltage conversion devices convert the 800V output voltage of the power battery pack into voltages with different sizes so as to supply power to the low-voltage devices of the corresponding voltage platforms through the output voltage of each voltage conversion device.
Electric vehicle's consumer can all be low-voltage apparatus, also can some consumers be low-voltage apparatus, and some consumers are high-voltage apparatus, specifically can set for according to actual demand. The high-voltage equipment can be directly powered by the output voltage of the power battery pack, namely, the voltage platform of the high-voltage equipment is the same as that of the power battery pack.
In the embodiment of the invention, the electric equipment comprises low-voltage equipment, the voltage platform of the low-voltage equipment is less than or equal to the preset voltage, the power supply loop corresponding to the low-voltage equipment is provided with the voltage conversion device, and the output voltage of the voltage conversion device is the same as the voltage platform of the low-voltage equipment, so that the charging efficiency is improved, and the reliability and the comprehensive cost of the electric vehicle are ensured.
Based on any one of the above embodiments, the electric device further comprises a high voltage device;
the voltage platform of the high-voltage equipment is the same as that of the power battery pack, and the power supply loop corresponding to the high-voltage equipment is not provided with the voltage conversion device.
Specifically, the voltage platform of the high-voltage device is the same as the voltage platform of the power battery pack, i.e., the voltage platform of the consumer is raised to the voltage platform employed by the power battery pack, e.g., 800 volts. And a power supply loop corresponding to the high-voltage equipment is not provided with a voltage conversion device, namely, the output voltage of the power battery pack directly supplies power to the high-voltage equipment.
The selection of the high-voltage equipment can be set according to actual requirements, for example, a voltage platform of electric equipment with power greater than preset power (namely, electric equipment with higher power) can be improved to a voltage platform adopted by a power battery pack, such as a running motor, so that the difficulty of voltage conversion and the cost of voltage conversion can be reduced, and the charging efficiency is effectively improved on the premise that fewer electric equipment are improved to the high-voltage platform; the preset power can be set according to actual requirements, for example, 50% of the total power of the electric vehicle. The technical mature high-voltage platform electric equipment can be determined as high-voltage equipment, so that the charging efficiency is effectively improved on the premise of ensuring the reliability of the electric equipment; the high-voltage equipment can be determined by simultaneously combining the power consumption of the electric equipment and the technical maturity of the electric equipment of the high-voltage platform. Taking an electric tractor as an example, a running motor can be determined as high-voltage equipment, and a power battery pack is directly utilized to supply power to the running motor; and determining other electric equipment as low-voltage equipment, and converting the output voltage of the power battery pack through a voltage conversion device to supply power, such as a steering oil pump, an inflating pump, an air conditioner compressor, a water cooling unit, a water heating heater and the like.
According to the embodiment of the invention, the electric equipment comprises the low-voltage equipment and the high-voltage equipment at the same time, the voltage platform of the high-voltage equipment is the same as that of the power battery pack, and the power supply loop corresponding to the high-voltage equipment is not provided with the voltage conversion device, so that the voltage conversion difficulty can be further reduced and the charging efficiency can be improved on the premise of ensuring the reliability and the comprehensive cost of the electric vehicle.
Based on any embodiment, the power battery pack is charged through the following steps:
when communication connection with the charging equipment is determined, a charging request instruction is sent to the charging equipment; the charging request instruction comprises a charging request voltage corresponding to the power battery pack;
receiving a voltage to be charged fed back by the charging equipment;
when the voltage to be charged is determined to be consistent with the charging request voltage, generating a second control instruction, and sending the second control instruction to a charging control switch; the second control instruction is used for controlling the charging control switch to be closed, and the closing or opening of the charging control switch is used for controlling the connection or disconnection of a charging loop of the power battery pack.
Specifically, the control device can acquire the electric quantity of the power battery pack in real time and send out a charging prompt when the current is lower than a preset value; the user can insert the charging plug of the charging equipment into the charging port of the electric vehicle according to the charging reminding information or the charging requirement so as to charge the power battery pack through the charging plug. After the charging plug is inserted into the charging port, the electric vehicle establishes communication connection with the charging equipment, and when the control device determines that the communication connection is established with the charging equipment, a charging request is sent to the charging equipment, wherein the charging request comprises the requested charging voltage of the power battery pack. After receiving the charging request, the charging equipment feeds back the voltage to be charged to a control device of the electric vehicle; the voltage to be charged is the charging voltage that the charging device is capable of providing. And when the control device determines that the charging voltage fed back by the charging equipment conforms to the charging voltage request, a second control instruction is generated and sent to the charging control switch so as to control the charging loop of the power battery pack to be connected. The voltage to be charged and the requested charging voltage are consistent, namely, the difference value of the voltage to be charged and the requested charging voltage is smaller than or equal to a preset voltage value. There may be coincidence of the charge control switch with the first switching device.
In addition, in the charging process, the control device can also obtain the charging current of the power battery pack so as to prevent the power battery pack from being damaged by abnormal charging current.
When the communication connection with the charging equipment is determined, the embodiment of the invention sends the request instruction comprising the charging voltage request corresponding to the power battery pack to the charging equipment, receives the voltage to be charged fed back by the charging equipment, and generates the second control instruction to control the charging control switch to be closed when the voltage to be charged is determined to be consistent with the charging voltage request, so as to control the corresponding charging loop to be connected, thereby effectively avoiding the damage to the power battery pack caused by inconsistent charging voltage and ensuring the charging safety of the power battery pack.
Based on any embodiment above, still include:
sending a detection instruction to each of the first switching devices and/or the charging control switches;
determining a fault detection result of the first switching device and/or the charge control switch based on a feedback signal of the first switching device and/or the charge control switch.
Specifically, the fault detection result may include no fault and a specific fault type, for example, a stuck-on fault, an open fault. The detection command may be a current signal. For example, when the first switching device and/or the charging control switch is turned off, the control device may send a current signal to the corresponding first switching device and/or the charging control switch, where the current signal fed back by the first switching device and/or the charging control switch is 0, which indicates that there is no sticking fault in the corresponding first switching device and/or the charging control switch, otherwise, there is a sticking fault; when the first switching device and/or the charging control switch are closed, the control device sends a current signal to the corresponding first switching device and/or the charging control switch, and the current signal fed back by the first switching device and/or the charging control switch is 0, which indicates that an open-circuit fault exists in the corresponding first switching device and/or the charging control switch, otherwise, the open-circuit fault does not exist.
It can be understood that the fault detection can be performed when the vehicle is powered on at high voltage, or can be performed according to actual requirements at preset time intervals.
According to the embodiment of the invention, the detection instruction is sent to the first switch device and/or the charging control switch, and the fault detection result of the first switch device and/or the charging control switch is determined based on the feedback signal of the first switch device and/or the charging control switch, so that corresponding measures can be timely found and taken when the first switch device and/or the charging control switch has a fault, the working reliability of the electric vehicle is ensured, and the damage to the electric equipment is avoided.
Based on any one of the above embodiments, the generating a first control command based on the operation signal and sending the first control command to a corresponding first switch device includes:
when the fact that the electric equipment needs to be precharged is determined, generating a precharge command based on the operation signal, and sending the precharge command to a second switching device of a precharge circuit of the electric equipment, wherein the precharge command is used for controlling the second switching device to be closed; wherein the closing or opening of the second switching device is used for controlling the connection or disconnection of the pre-charging circuit;
when the fact that the pre-charging of the electric equipment is completed is determined, a pre-charging end command and the first control command are generated, the pre-charging end command is sent to the second switch device, the first control command is sent to the corresponding first switch device, and the pre-charging end command is used for controlling the second switch device to be switched off.
Specifically, after receiving the operation signal, it may be determined whether the electrical equipment needs to be precharged, and when the precharging is needed, the corresponding second switching device is controlled to be turned on first to precharge the electrical equipment, and after the precharging is completed, the second switching device is controlled to be turned off, and the corresponding first switching device is controlled to be turned on to normally supply power to the electrical equipment.
The specific manner of determining whether the electric equipment needs to be precharged may be set according to actual requirements, for example, may be determined according to the type of the electric equipment, or may be predefined and stored in the control device, so as to determine whether the corresponding electric equipment needs to be precharged quickly and accurately after receiving the operation signal.
The pre-charging circuit may include a second switching device and a pre-charging resistor, and the second switching device may coincide with the first switching device and the charging control switch. Meanwhile, the control device may further send a detection instruction to each of the second switching devices, and determine a fault detection result of the second switching device based on a feedback signal of the second switching device.
The specific manner of determining the completion of the precharging of the electric equipment may also be set according to actual requirements, and may be determined as the completion of the precharging, for example, when the voltage of the electric equipment reaches a preset voltage (e.g., 95U, U being the rated voltage of the electric equipment), or when the precharging period reaches a preset period.
When the electric equipment needs to be precharged, the embodiment of the invention generates the precharging command based on the operation signal and sends the precharging command to the second switch device of the precharging circuit of the electric equipment so as to control the precharging circuit of the electric equipment to be switched on for precharging, generates the precharging end command and the first control command after the precharging is finished, sends the precharging end command to the second switch device of the precharging circuit of the electric equipment, and sends the first control command to the first switch device of the power supply circuit of the electric equipment, thereby effectively ensuring the normal work of the electric equipment.
The following describes a power supply device for an electric vehicle provided by the present invention, and the power supply device for an electric vehicle described below and the power supply method for an electric vehicle described above may be referred to in correspondence with each other. As shown in fig. 2, the power supply apparatus for an electric vehicle of the present invention includes:
a data acquisition module 201 for acquiring an operation signal of the electric vehicle;
a calculating module 202, configured to generate a first control instruction based on the operation signal, and send the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
Based on the above embodiment, the electric device includes a low voltage device;
the voltage platform of the low-voltage equipment is less than or equal to the preset voltage, the power supply loop corresponding to the low-voltage equipment is provided with the voltage conversion device, and the output voltage of the voltage conversion device is the same as the voltage platform of the low-voltage equipment.
Based on any one of the above embodiments, the electric device further comprises a high voltage device;
the voltage platform of the high-voltage equipment is the same as that of the power battery pack, and the power supply loop corresponding to the high-voltage equipment is not provided with the voltage conversion device.
Based on any one of the above embodiments, the mobile terminal further comprises a charging module, wherein the charging module is configured to:
when communication connection with the charging equipment is determined, a charging request instruction is sent to the charging equipment; the charging request instruction comprises a charging request voltage corresponding to the power battery pack;
receiving voltage to be charged fed back by the charging equipment;
when the voltage to be charged is determined to be consistent with the charging request voltage, generating a second control instruction, and sending the second control instruction to a charging control switch; the second control instruction is used for controlling the charging control switch to be closed, and the closing or opening of the charging control switch is used for controlling the connection or disconnection of a charging loop of the power battery pack.
Based on any of the above embodiments, the mobile terminal further comprises a detection module, wherein the detection module is configured to:
sending a detection instruction to each of the first switching devices and/or the charging control switches;
determining a fault detection result of the first switching device and/or the charge control switch based on a feedback signal of the first switching device and/or the charge control switch.
Based on any of the above embodiments, the calculation module 202 is specifically configured to:
when the fact that the electric equipment needs to be precharged is determined, generating a precharge command based on the operation signal, and sending the precharge command to a second switching device of a precharge circuit of the electric equipment, wherein the precharge command is used for controlling the second switching device to be closed; wherein the closing or opening of the second switching device is used for controlling the connection or disconnection of the pre-charging circuit;
when the fact that the pre-charging of the electric equipment is completed is determined, a pre-charging end command and the first control command are generated, the pre-charging end command is sent to the second switch device, the first control command is sent to the corresponding first switch device, and the pre-charging end command is used for controlling the second switch device to be switched off.
The electric vehicle provided by the present invention is described below, and the electric vehicle described below and the power supply method of the electric vehicle described above may be referred to in correspondence with each other. As shown in fig. 3, the electric vehicle of the invention includes: a power battery pack 301, an electric device 302, a first switching device 303, a voltage conversion device 304, and a control device 305;
the control device 305 is used for acquiring an operation signal of the electric vehicle; the first switch device 303 is further configured to generate a first control instruction based on the operation signal and send the first control instruction to the corresponding first switch device 303; the first control instruction is used for controlling the closing or opening of the first switching device 303, and the closing or opening of the first switching device 303 is used for controlling the connection or disconnection of the power battery pack 301 and the corresponding power supply circuit of the electric equipment 302;
the voltage platform of the power battery pack 301 is greater than the preset voltage;
the voltage conversion device 304 is disposed in a part or all of the power supply circuits, the voltage conversion device 304 is configured to convert an output voltage of the power battery pack 301 and then supply power to the corresponding electric device 302, and the output voltage of the voltage conversion device 304 is less than or equal to the preset voltage.
Specifically, the electric vehicle is a vehicle using a power battery as an energy source, such as an electric passenger vehicle, an electric commercial vehicle and the like, and the electric commercial vehicle is an electric tractor, an electric heavy truck and the like.
It should be noted that the voltage conversion device 304 is disposed in part or all of the power supply loop, and fig. 3 is only illustrated by the voltage conversion device 304 being disposed in part of the power supply loop.
The following describes in detail a specific implementation of the power supply method for an electric vehicle according to the present invention, taking an electric tractor as an example. Fig. 4 is a schematic diagram of a power supply system of an electric tractor, and an electric device 302 includes: a running motor 401, a battery heating film 402, a steering oil pump 403, an air pump 404, a low-voltage storage battery 405, an air-conditioning compressor 406, a water-cooling unit 407, and a water-heating heater 408.
The running motor 401 is connected with the power battery pack 301 through a running motor controller 409, the power battery pack 301 adopts an 800-volt voltage platform, and the steering oil pump 403, the inflating pump 404, the low-voltage storage battery 405, the air-conditioning compressor 406, the water cooling unit 407 and the water heating heater 408 are connected with the power battery pack 301 through a first DCDC voltage converter 410 and an all-in-one controller 411. The first DCDC voltage converter 410 converts 800 v output by the power battery pack 301 into 600 v and supplies power to the steering oil pump 403, the inflating pump 404, the low-voltage storage battery 405, the air-conditioning compressor 406, the water cooling unit 407 and the water heating heater 408. The battery heating film 402 is a resistor for heating the power battery pack 301, and its input voltage is not limited (it may be powered by the power battery pack 301 or by the first DCDC voltage converter 410). The power battery pack 301 is charged through a charging port 412, and the charging port 412 is used for connecting a charging device with a direct current of 800 volts.
The negative electrode of the power battery pack 301 is connected to the negative electrode of the travel motor controller 409, the negative electrode of the battery heating film 402, the negative electrode of the 800 v input terminal of the first DCDC voltage converter 410, and the negative electrode of the charging port 412, respectively, through the first switch K1. A second switch K2 and a first pre-charging branch circuit which are connected in parallel are arranged between the anode of the power battery pack 301 and the anode of the running motor controller 409, and the first pre-charging branch circuit comprises a third switch K3 and a first pre-charging resistor R1 which are connected in series; a fifth switch K5 is arranged between the positive electrode of the power battery pack 301 and the positive electrode of the battery heating film 402; a fourth switch K4 is arranged between the positive electrode of the power battery pack 301 and the positive electrode of the 800-volt input port of the first DCDC voltage converter 410; a sixth switch K6 is arranged between the positive electrode of the power battery pack 301 and the positive electrode of the charging port 412; the positive electrode of the power battery pack 301 is also provided with a manual switch MSD for manually controlling the electric connection of the power battery pack 301; the negative electrode of the power battery pack 301 is further provided with a current divider FL for detecting the charging current and/or the discharging current of the power battery pack 301.
The all-in-one controller 411 includes a second pre-charging branch, an eighth switch K8, a ninth switch K9, a tenth switch K10, a second DCDC voltage converter 413, a first DCAC (Direct-Current-Alternating-Current) voltage converter 414, a second DCAC voltage converter 415, a first fuse F1, a second fuse F2, a third fuse F3, a fourth fuse F4, a fifth fuse F5, and a sixth fuse F6; the second pre-charging branch comprises a seventh switch K7 and a second pre-charging resistor R2 which are connected in series. The positive electrode of the input end of the second DCDC voltage converter 413 is connected with the positive electrode of the 600 volt output end of the first DCDC voltage converter 410 through a first fuse F1, and the output end of the second DCDC voltage converter 413 is connected with the steering oil pump 403, and is used for converting the 600 volt voltage into 24 volt voltage and supplying power to the steering oil pump 403; the positive electrode of the input end of the first DCAC voltage converter 414 is connected to the positive electrode of the 600 v output end of the first DCDC voltage converter 410 through the second fuse F2, and the output end of the first DCAC voltage converter 414 is connected to the inflating pump 404, and is configured to convert a direct-current voltage into an alternating-current voltage and supply power to the inflating pump 404; the positive electrode of the input end of the second DCAC voltage converter 415 is connected to the positive electrode of the 600 v output end of the first DCDC voltage converter 410 through a third fuse F3, and the output end of the second DCAC voltage converter 415 is connected to the low-voltage battery 405, and is configured to convert a direct-current voltage into an alternating-current voltage and supply power to the low-voltage battery 405; the eighth switch K8 and the sixth fuse F6 are connected in series and then are arranged between the positive electrode of the 600 volt output end of the first DCDC voltage converter 410 and the positive electrode of the air-conditioning compressor 406, and the second pre-charging branch is connected in parallel with the eighth switch K8; the ninth switch K9 is connected in series with the fourth fuse F4 and then disposed between the positive electrode of the 600 v output end of the first DCDC voltage converter 410 and the positive electrode of the water chiller unit 407; the tenth switch K10 is connected in series with the fifth fuse F5 and then disposed between the positive electrode of the 600 v output terminal of the first DCDC voltage converter 410 and the positive electrode of the water heating heater 408; the negative electrode of the 600 volt output terminal of the first DCDC voltage converter 410 is connected to the negative electrode of the second DCDC voltage converter 413, the negative electrode of the first DCAC voltage converter 414, the negative electrode of the second DCAC voltage converter 415, the negative electrode of the air conditioner compressor 406, the negative electrode of the water chiller unit 407, and the negative electrode of the water heater 408, respectively.
As shown in fig. 5, the power supply system further includes a control device 305, the control device 305 is electrically connected to the first to tenth switches K1 to K10 through control lines and detection lines, and the control device 305 is electrically connected to the shunt FL through the detection lines; the control device 305 is connected with a running motor controller 409, an all-in-one controller 411, an air conditioner compressor 406, a water cooling unit 407, a water heating heater 408, a charging port 412, a power battery pack 301, a first DCDC voltage converter 410 and a vehicle control unit 501 through a CAN bus. In fig. 5, the dotted lines represent detection lines, the single solid lines represent control lines, and the double solid lines represent CAN buses.
The power supply process comprises the following steps:
the control device 305 detects a high-voltage power-on request through the CAN bus, performs self-checking, closes the first switch K1 and the fourth switch K4 when no abnormality occurs, and the all-in-one controller 411 switches on the high-voltage power to supply power to the steering oil pump 403, the inflating pump 404 and the low-voltage storage battery 405.
The control device 305 detects a running request (a key is used for hitting a START gear) through the CAN bus, firstly closes the third switch K3, charges the running motor controller 409 through the first pre-charging resistor R1, completes pre-charging when the bus voltage of the running motor controller 409 meets requirements, closes the second switch K2 and disconnects the third switch K3, and the running motor 401 CAN work according to the gear and accelerator position information of the electric vehicle.
According to an operation signal of a user, the ninth switch K9 can be closed to supply power to the water cooling unit 407, the tenth switch K10 is closed to supply power to the water heating heater 408, the fifth switch K5 is closed to supply power to the battery heating film 402, the seventh switch K7 is closed to pre-charge the air-conditioning compressor 406 through the second pre-charging resistor R2, when the bus voltage of the air-conditioning compressor 406 meets the requirement, the pre-charging is completed, the eighth switch K8 is closed, and the seventh switch K7 is opened.
In the power supply process, message signals of a running motor controller 409, an all-in-one controller 411, an air conditioner compressor 406, a water cooling unit 407, a water heating heater 408, a charging port 412, a power battery pack 301, a first DCDC voltage converter 410 and a vehicle control unit 501 are acquired through a CAN bus so as to detect and display state signals of related electric equipment 302 and determine whether charging is needed. Meanwhile, the discharge current of the power battery pack 301 is detected through the shunt FL to turn off the corresponding switch or to warn when the discharge current is abnormal.
The charging process comprises the following steps:
when determining that the communication connection is established with the charging device, the control device 305 sends a charging request instruction to the charging device connected to the charging port 412; the charging equipment feeds back the voltage to be charged to the control device 305, the control device 305 compares the voltage to be charged fed back by the charging equipment connected with the charging port 412 with the charging request voltage, and if the voltage to be charged and the charging request voltage are consistent, the first switch K1 and the sixth switch K6 are closed to charge the power battery pack 301, so that the situation that the charging voltage is inconsistent with the damage to the power battery pack 301 or the influence on the charging efficiency is avoided.
During charging, the charging current of the power battery pack 301 is also detected through the current divider FL, so as to prevent the damage of the charging current abnormality to the power battery pack 301 or the influence on the charging efficiency.
Fig. 6 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 6: a processor (processor) 601, a communication Interface (Communications Interface) 602, a memory (memory) 603 and a communication bus 604, wherein the processor 601, the communication Interface 602 and the memory 603 complete communication with each other through the communication bus 604. The processor 601 may invoke logic instructions in the memory 603 to perform a method of powering an electric vehicle, the method comprising: acquiring an operation signal of the electric vehicle;
generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
In addition, the logic instructions in the memory 603 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer-readable storage medium, the computer program, when executed by a processor, being capable of executing the method for supplying power to an electric vehicle provided by the above methods, the method comprising: acquiring an operation signal of the electric vehicle;
generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements a method of supplying power to an electric vehicle provided by the above methods, the method including: acquiring an operation signal of the electric vehicle;
generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is larger than a preset voltage, a part or all of the power supply loop is provided with a voltage conversion device, the voltage conversion device is used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is smaller than or equal to the preset voltage.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A method of supplying power to an electric vehicle, comprising:
acquiring an operation signal of the electric vehicle;
generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is greater than a preset voltage, a voltage conversion device is arranged in a part or all of the power supply loop and used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is less than or equal to the preset voltage.
2. The power supply method for an electric vehicle according to claim 1, wherein the electric device includes a low voltage device;
the voltage platform of the low-voltage equipment is less than or equal to the preset voltage, the power supply loop corresponding to the low-voltage equipment is provided with the voltage conversion device, and the output voltage of the voltage conversion device is the same as the voltage platform of the low-voltage equipment.
3. The power supply method for an electric vehicle according to claim 2, wherein the electric device further includes a high-voltage device;
the voltage platform of the high-voltage equipment is the same as that of the power battery pack, and the power supply loop corresponding to the high-voltage equipment is not provided with the voltage conversion device.
4. The power supply method for an electric vehicle according to any one of claims 1 to 3, characterized in that the power battery pack is charged by:
when communication connection with the charging equipment is determined, a charging request instruction is sent to the charging equipment; the charging request instruction comprises a charging request voltage corresponding to the power battery pack;
receiving a voltage to be charged fed back by the charging equipment;
when the voltage to be charged is determined to be consistent with the charging request voltage, generating a second control instruction, and sending the second control instruction to a charging control switch; the second control instruction is used for controlling the charging control switch to be closed, and the closing or opening of the charging control switch is used for controlling the connection or disconnection of a charging loop of the power battery pack.
5. The power supply method for an electric vehicle according to claim 4, characterized by further comprising:
sending a detection instruction to each of the first switching devices and/or the charging control switches;
determining a fault detection result of the first switching device and/or the charge control switch based on a feedback signal of the first switching device and/or the charge control switch.
6. The method according to claim 1, wherein the generating a first control command based on the operation signal and transmitting the first control command to the corresponding first switching device includes:
when the fact that the electric equipment needs to be precharged is determined, generating a precharge command based on the operation signal, and sending the precharge command to a second switching device of a precharge circuit of the electric equipment, wherein the precharge command is used for controlling the second switching device to be closed; wherein the closing or opening of the second switching device is used for controlling the connection or disconnection of the pre-charging circuit;
when the pre-charging of the electricity utilization equipment is determined to be completed, a pre-charging ending instruction and the first control instruction are generated, the pre-charging ending instruction is sent to the second switch device, the first control instruction is sent to the corresponding first switch device, and the pre-charging ending instruction is used for controlling the second switch device to be disconnected.
7. A power supply apparatus of an electric vehicle, characterized by comprising:
the data acquisition module is used for acquiring an operation signal of the electric vehicle;
the computing module is used for generating a first control instruction based on the operation signal and sending the first control instruction to a corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the first switching device is closed or opened for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment; the voltage platform of the power battery pack is larger than a preset voltage, a part or all of the power supply loop is provided with a voltage conversion device, the voltage conversion device is used for converting the output voltage of the power battery pack and then supplying power to corresponding electric equipment, and the output voltage of the voltage conversion device is smaller than or equal to the preset voltage.
8. An electric vehicle, characterized by comprising: the device comprises a power battery pack, electric equipment, a first switching device, a voltage conversion device and a control device;
the control device is used for acquiring an operation signal of the electric vehicle; the first switch device is also used for generating a first control instruction based on the operation signal and sending the first control instruction to the corresponding first switch device; the first control instruction is used for controlling the first switching device to be closed or opened, and the closing or opening of the first switching device is used for controlling the power battery pack to be connected or disconnected with a power supply loop of the corresponding electric equipment;
the voltage platform of the power battery pack is greater than the preset voltage;
the voltage conversion device is arranged in part or all of the power supply loops, the voltage conversion device is used for converting the output voltage of the power battery pack and then supplying power to the corresponding electric equipment, and the output voltage of the voltage conversion device is smaller than or equal to the preset voltage.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of powering an electric vehicle according to any one of claims 1 to 6 when executing the program.
10. A non-transitory computer-readable storage medium, on which a computer program is stored, the computer program, when being executed by a processor, implementing a power supply method for an electric vehicle according to any one of claims 1 to 6.
CN202211117883.5A 2022-09-14 2022-09-14 Power supply method and device for electric vehicle and electric vehicle Pending CN115366682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211117883.5A CN115366682A (en) 2022-09-14 2022-09-14 Power supply method and device for electric vehicle and electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211117883.5A CN115366682A (en) 2022-09-14 2022-09-14 Power supply method and device for electric vehicle and electric vehicle

Publications (1)

Publication Number Publication Date
CN115366682A true CN115366682A (en) 2022-11-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211117883.5A Pending CN115366682A (en) 2022-09-14 2022-09-14 Power supply method and device for electric vehicle and electric vehicle

Country Status (1)

Country Link
CN (1) CN115366682A (en)

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