CN115447382A - 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
CN115447382A
CN115447382A CN202211117571.4A CN202211117571A CN115447382A CN 115447382 A CN115447382 A CN 115447382A CN 202211117571 A CN202211117571 A CN 202211117571A CN 115447382 A CN115447382 A CN 115447382A
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China
Prior art keywords
battery pack
power battery
charging
voltage
electric vehicle
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Pending
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CN202211117571.4A
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Chinese (zh)
Inventor
王锐
张�林
张文辉
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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 CN202211117571.4A priority Critical patent/CN115447382A/en
Publication of CN115447382A publication Critical patent/CN115447382A/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
    • 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 a corresponding first switch device; the first control instruction is used for controlling the on or off of the first switching device, and the on or off of the first switching device is used for controlling the on or off of the first power battery pack and the power supply circuit of the second power battery pack and the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power to different electric equipment. 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 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 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 switch device to be closed or opened, and the first switch device is closed or opened for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the power supply circuit of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
According to the power supply method of the electric vehicle provided by the invention, the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the power consumption of each electric device of the electric vehicle; the capacity of the first power battery pack is larger than that of the second power battery pack.
According to the power supply method of the electric vehicle provided by the invention, the first power battery pack and the second power battery pack are charged by using charging equipment with different voltage platforms.
According to the power supply method of the electric vehicle provided by the present invention, the first power battery pack and the second power battery pack are 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 first power battery pack or the second 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; and 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 charging loop of the first power battery pack or the second power battery pack to be connected or disconnected.
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 an 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 a corresponding first switching device includes:
when the fact that the electric equipment needs to be precharged is determined, generating a precharging command based on the operation signal, and sending the precharging command to a second switching device of a precharging circuit of the electric equipment, wherein the precharging 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 switch device to be closed or opened, and the first switch device is closed or opened for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the power supply circuit of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
The present invention also provides an electric vehicle including: the power supply comprises a first power battery pack, a second power battery pack, electric equipment, a first switch device and a control device;
the first power battery pack and the second power battery pack are respectively used for supplying power to different electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment;
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 switch device to be closed or opened, and the first switch device is used for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the corresponding power supply loop of the electric equipment.
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 first power battery pack or the second power battery pack is controlled to supply power or stop supplying power to the corresponding electric equipment 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 first power battery pack is larger than the preset voltage, so that the charging efficiency of the electric vehicle can be effectively improved, the voltage platform of the second power battery pack is smaller than or equal to the preset voltage, and the electric equipment corresponding to the second power battery pack is produced by mass production mature equipment with high reliability and low comprehensive cost, so that 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 to be used in 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 it is obvious for those skilled in the art to obtain other drawings based on these 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 structural view of an electric vehicle provided by 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 clearer, 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 present 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 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 switch device to be closed or opened, and the first switch device is closed or opened for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the power supply circuit of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
Specifically, the electric vehicle may include at least one first power battery pack and at least one second power battery pack, the first power battery pack and the second power battery pack are respectively used for supplying power to different electric devices on the electric vehicle, and a voltage platform of the first power battery pack and a voltage platform of the second power battery pack are respectively the same as a voltage platform of a corresponding electric device. The first switch device is arranged on the power supply loops of the first power battery pack, the second power battery pack and the corresponding electric equipment and used for controlling the connection or disconnection of the corresponding power supply loops, the power supply loops are connected, the first power battery pack or the second power battery pack supplies power to the corresponding electric equipment, the power supply loops are disconnected, and the first power battery pack or the second power battery pack stops supplying power to the corresponding electric equipment.
The voltage platform of the first power battery pack is larger than the preset voltage, the voltage platform of the second power battery pack is smaller than or equal to 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 currently on the market, for example, the preset voltage may be set to 600 volts; the voltage platform of the first power battery pack is larger than the preset voltage, for example, 1000 volts or higher can be set, the charging power of the first 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. The voltage platform of second power battery group can be equal to and predetermine voltage, for example, can set for 600 volts, and promptly, the consumer that second power battery group corresponds can adopt the ripe equipment of volume production of 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 first power battery pack and the corresponding electric equipment are located on a first voltage platform, the second power battery pack and the corresponding electric equipment are located on a second voltage platform, the first voltage platform and the second voltage platform are independent, and even if a user operates by mistake, the risk of electric equipment failure caused by series connection cannot exist.
It will be appreciated that when a plurality of first power battery packs and a plurality of second power battery packs are included, the voltage plateau of each first power battery pack may be the same or different, and the voltage plateau of each second power battery pack may also be the same or different.
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.
The specific mode of generating the first control instruction based on the operation signal can be set according to actual requirements, for example, vehicle self-inspection can be performed after the operation signal is received, and a corresponding first control instruction is generated after no abnormality is determined; 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.
In the conventional 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 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.
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 or off of the first switch device, and the first power battery pack or the second power battery pack is controlled to supply power or stop supplying power to the corresponding electric equipment through the on or 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 first power battery pack is larger than the preset voltage, so that the charging efficiency of the electric vehicle can be effectively improved, and the voltage platform of the second power battery pack is smaller than or equal to the preset voltage, so that the electric equipment corresponding to the second power battery pack adopts mass production mature equipment with high reliability and low comprehensive cost, 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 capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the used amounts of the electric devices of the electric vehicle; the capacity of the first power battery pack is larger than that of the second power battery pack.
Specifically, the electric device corresponding to the first power battery pack and the electric device corresponding to the second power battery pack may be determined based on the power consumption of each electric device of the electric vehicle, and then the capacity of the first power battery pack may be determined based on the power consumption of the electric device corresponding to the first power battery pack, and the capacity of the second power battery pack may be determined based on the power consumption of the electric device corresponding to the second power battery pack.
Wherein, the concrete mode that the consumer that corresponds that the consumer that confirms first power battery group and the consumer that the second power battery group corresponds based on electric vehicle's each consumer's power consumption can be set for according to the actual demand, can guarantee that the capacity of first power battery group is greater than the capacity of second power battery group can to reduce redundant electric quantity when can ensure that electric vehicle satisfies the operating mode demand, and realize the effective improvement of electric vehicle whole charging efficiency. For example, the electric equipment with larger power consumption can be supplied with power by adopting the first power battery pack, such as a running motor, so that the charging efficiency can be effectively improved on the premise of ensuring that less electric equipment is improved into a high-voltage platform; the power supply system can also supply power to high-voltage platform electric equipment with mature technology by adopting the first power battery pack so as to effectively improve the charging efficiency on the premise of ensuring the reliability of the electric equipment; the electric equipment powered by the first power battery pack 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, the first power battery pack can be used for supplying power to a running motor, and the second power battery pack is used for supplying power to other electric equipment, such as a steering oil pump, an inflating pump, a three-in-one controller, an air conditioning compressor, a water cooling unit, a water heating heater, a battery heating film and the like, so that the capacity of the first power battery pack accounts for more than 90% of the total power consumption of the electric vehicle, and the charging efficiency of the electric vehicle is effectively improved. Experiments prove that when the first power battery pack adopts a 1000V voltage platform and the second power battery pack adopts the existing 600V voltage platform, the charging time can be shortened by more than 35%. Meanwhile, only the running motor is lifted to the high-voltage platform corresponding to the first power battery pack, other electric equipment still adopts the electric equipment which is relatively mature in the existing mass production technology, and the reliability is high and the comprehensive cost is low.
According to the embodiment of the invention, the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the power consumption of each electric device of the electric vehicle, so that the electric vehicle can meet the working condition requirement, the redundant electric quantity can be reduced, the reliability and the comprehensive cost of the electric vehicle are ensured, and the charging efficiency is effectively improved.
Based on any embodiment, the first power battery pack and the second power battery pack are charged by using charging equipment with different voltage platforms.
Specifically, the first power battery pack and the second power battery pack are respectively charged by charging devices with different voltage platforms, that is, the voltage platform adopted by the charging device for charging the first power battery pack is consistent with the voltage platform of the first power battery pack, such as 1000 v; the voltage platform adopted by the charging equipment for charging the second power battery pack is consistent with that of the second power battery pack, such as 600V, so that the charging efficiency of the electric vehicle can be improved, and meanwhile, the charging safety is effectively ensured.
Based on any one of the above embodiments, the first power battery pack and the second power battery pack are 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 first power battery pack or the second 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 charging loop of the first power battery pack or the second power battery pack to be connected or disconnected.
Specifically, the first power battery pack and the second power battery pack are charged through different charging ports, that is, the electric vehicle includes charging ports corresponding to the first power battery pack and the second power battery pack one to one, and in the charging process, a charging plug of the charging device is inserted into the corresponding charging port to charge the first power battery pack and/or the second power battery pack.
The control device can acquire the electric quantity of the first power battery pack and the second 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 device into the charging port corresponding to the power battery pack to be charged according to the charging reminding information or the charging requirement. 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, the control device sends a charging request to the charging equipment, wherein the charging request comprises the requested charging voltage of the first power battery pack or the second power battery pack corresponding to the charging port. 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, generating a second control instruction, and sending the second control instruction to the charging control switch to control the charging loop of the first power battery pack or the second power battery pack corresponding to the charging port to be switched on. 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.
It is understood that when the first power battery pack and the second power battery pack are charged simultaneously, a charging request command may be sent to the charging device to which the corresponding charging port is connected, respectively.
In addition, in the charging process, the control device can also obtain the charging current of the corresponding power battery pack so as to prevent the damage of the abnormal charging current to the corresponding power battery pack.
When the communication connection with the charging equipment is determined, the charging equipment sends a request instruction comprising a charging request voltage corresponding to the first power battery pack or the second power battery pack to the charging equipment, receives the voltage to be charged fed back by the charging equipment, and generates a 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 request voltage, so that the corresponding charging loop is controlled to be connected.
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, stuck-on fault, open fault. The detection command may be a current signal. For example, when the first switch device and/or the charging control switch is turned off, the control device may send a current signal to the corresponding first switch device and/or the charging control switch, where the current signal fed back by the first switch device and/or the charging control switch is 0, which indicates that there is no sticking fault in the corresponding first switch 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 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 the 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 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.
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 overlap 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 pre-charging of the electric equipment can also be set according to actual requirements, for example, the pre-charging can be determined when the voltage of the electric equipment reaches a preset voltage (e.g. 95% U, U is the rated voltage of the electric equipment), or the pre-charging can be determined when the pre-charging time period reaches a preset time 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 switch device to be closed or opened, and the first switch device is closed or opened for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the power supply circuit of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
Based on the above embodiment, the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the used amounts of the electric devices of the electric vehicle; the capacity of the first power battery pack is larger than that of the second power battery pack.
Based on any of the above embodiments, the first power battery pack and the second power battery pack are charged by using charging devices with different voltage platforms.
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 first power battery pack or the second 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 charging loop of the first power battery pack or the second power battery pack to be connected or disconnected.
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 first switch device and/or the charging control switch;
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 precharging command based on the operation signal, and sending the precharging command to a second switching device of a precharging circuit of the electric equipment, wherein the precharging 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 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 first power battery pack 301, a second power battery pack 302, an electric device 303, a first switching device 304, and a control device 305;
the first power battery pack 301 and the second power battery pack 302 are respectively used for supplying power to different electric devices 303; the voltage platform of the first power battery pack 301 is greater than a preset voltage, and the voltage platform of the second power battery pack 302 is less than or equal to the preset voltage; the voltage platform of the first power battery pack 301 and the voltage platform of the second power battery pack 302 are the same as the voltage platform of the corresponding electric equipment 303;
the control device 305 is used for acquiring an operation signal of the electric vehicle; 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 304; the first control instruction is used for controlling the first switch device 304 to be closed or opened, and the closing or opening of the first switch device 304 is used for controlling the first power battery pack 301 and the second power battery pack 302 to be connected or disconnected with the power supply circuit of the corresponding electric equipment 303.
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 number of each of the first power battery pack 301 and the second power battery pack 302 may be one or more, and fig. 3 only illustrates the case where one first power battery pack 301 and one second power battery pack 302 are included.
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 shows a schematic configuration of a power supply system of an electric traction vehicle, and the power consumption device 303 includes: a traveling motor 401, a steering oil pump 402, an air pump 403, a low-voltage battery 404, an air-conditioning compressor 405, a water chiller 406, a water heating heater 407, a first battery heating film 408, and a second battery heating film 409.
Wherein, the running motor 401 is connected with the first power battery pack 301 through the running motor controller 410, the steering oil pump 402, the inflating pump 403 and the low-voltage storage battery 404 are connected with the second power battery pack 302 through the three-in-one controller 411, and the first battery heating film 408 and the second battery heating film 409 are respectively used for heating the first power battery pack 301 and the second power battery pack 302; the first power battery pack 301 is charged through the first charging port 412, and the second power battery pack 302 is charged through the second charging port 413; the first charging port 412 is used for connecting a charging device with a direct current of 800-1500 volts, and the second charging port 413 is used for connecting a charging device with a direct current of 400-750 volts.
A first manual maintenance switch MSD1 and a second switch K2 which are connected in series are arranged between the anode of the first power battery pack 301 and the anode of the running motor controller 410, and a first pre-charging branch circuit which is connected with the second switch K2 in parallel is further arranged, wherein the first pre-charging branch circuit comprises a third switch K3 and a first pre-charging resistor R1 which are connected in series; a first switch K1 is arranged between the negative electrode of the first power battery pack 301 and the negative electrode of the running motor controller 410; a fourth switch K4 is arranged between the positive electrode of the first power battery pack 301 and the positive electrode of the first charging port 412, and the negative electrode of the first charging port 412 is connected with the negative electrode of the first power battery pack 301 through the first switch K1.
The positive pole of the second power battery pack 302 is connected with the positive poles of the three-in-one controller 411, the air conditioner compressor 405, the water cooling unit 406, the water heating heater 407, the first battery heating film 408, the second battery heating film 409 and the second charging port 413 through a fifth switch K5, respectively, and the negative pole of the second power battery pack 302 is connected with the negative poles of the three-in-one controller 411, the air conditioner compressor 405, the water cooling unit 406, the water heating heater 407, the first battery heating film 408, the second battery heating film 409 and the second charging port 413 through a sixth switch K6, respectively; a second manual maintenance switch MSD2 is also arranged between the fifth switch K5 and the positive electrode of the second power battery pack 302; a fourth fuse F4 and an eighth switch K8 which are connected in series are arranged between the fifth switch K5 and the positive electrode of the first battery heating film 408; a fifth fuse F5 and a ninth switch K9 which are connected in series are arranged between the fifth switch K5 and the anode of the second battery heating film 409; a first fuse F1 and an eleventh switch K11 which are connected in series are arranged between the fifth switch K5 and the positive electrode of the air-conditioning compressor 405, and a second pre-charging branch is further arranged, the second pre-charging branch is connected with the first fuse F1 and the eleventh switch K11 in parallel, and comprises a tenth switch K10 and a second pre-charging resistor R2 which are connected in series; a second fuse F2 and a twelfth switch K12 which are connected in series are arranged between the fifth switch K5 and the anode of the water cooling unit 406; a third fuse F3 and a thirteenth switch K13 which are connected in series are arranged between the fifth switch K5 and the anode of the water heating heater 407; a seventh switch K7 is provided between the fifth switch K5 and the positive electrode of the second charging port 413. The negative pole of the first power battery set 301 is provided with a first current divider FL1, and the negative pole of the second power battery set 302 is provided with a second current divider FL2.
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 thirteenth switches K1 to K13 through control lines and detection lines, and the control device 305 is electrically connected to the first current divider FL1 and the second current divider FL2 through detection lines; the control device 305 is connected with a running motor controller 410, a three-in-one controller 411, an air conditioner compressor 405, a water cooling unit 406, a water heating heater 407, a first battery heating film 408, a second battery heating film 409, a first charging port 412, a second charging port 413, a first power battery pack 301, a second power battery pack 302 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 fifth switch K5 and the sixth switch K6 when no abnormality occurs, and the three-in-one controller 411 switches on the high-voltage power to supply power to the steering oil pump 402, the inflating pump 403 and the low-voltage storage battery 404.
Control device 305 detects the request of traveling (the key is played to the START gear) through the CAN bus, closes first switch K1 first, then closes third switch K3, charges for motor controller 410 that travels through first pre-charge resistance R1, when motor controller 410 that travels bus voltage satisfies the requirement, and the pre-charge is accomplished, closes second switch K2 and opens third switch K3, and motor 401 that travels CAN work according to electric vehicle's gear and throttle position information.
According to an operation signal of a user, the twelfth switch K12 can be closed to supply power to the water cooling unit 406, the thirteenth switch K13 is closed to supply power to the water heating heater 407, the eighth switch K8 is closed to supply power to the first battery heating film 408, the ninth switch K9 is closed to supply power to the second battery heating film 409, the tenth switch K10 is closed to pre-charge the air conditioning compressor 405 through the second pre-charging resistor R2, when the bus voltage of the air conditioning compressor 405 meets the requirement, the pre-charging is completed, the eleventh switch K11 is closed, and the tenth switch K10 is opened.
In the power supply process, message signals of the running motor controller 410, the three-in-one controller 411, the air conditioner compressor 405, the water cooling unit 406, the water heating heater 407, the first battery heating film 408, the second battery heating film 409, the first charging port 412, the second charging port 413, the first power battery pack 301, the second power battery pack 302 and the vehicle control unit 501 are collected through the CAN bus, so that state signals of related electric equipment 303 are detected and displayed, and whether charging is needed or not is determined. Meanwhile, the discharge currents of the first power battery pack 301 and the second power battery pack 302 are detected through the first shunt FL1 and the second shunt FL2, respectively, so as to open the corresponding switch or warn when the discharge currents are abnormal.
The charging process comprises the following steps:
when determining that the communication connection with the charging device is established, control device 305 transmits a charging request command to the charging device connected to first charging port 412 and the charging device connected to second charging port 413, respectively; the corresponding charging device 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 device connected with the first charging port 412 with the charging request voltage corresponding to the first power battery pack 301, if the voltage to be charged fed back by the charging device connected with the second charging port 412 is consistent with the charging request voltage corresponding to the second power battery pack 302, the first switch K1 and the fourth switch K4 are closed to charge the first power battery pack 301, meanwhile, the voltage to be charged fed back by the charging device connected with the second charging port 413 is compared with the charging request voltage corresponding to the second power battery pack 302, and if the voltage to be charged is consistent with the charging request voltage corresponding to the second power battery pack 302, the fifth switch K5, the sixth switch K6 and the seventh switch K7 are closed to charge the second power battery pack 302, so that a user is prevented from inserting the charging plugs of the first charging port 412 and the second charging port 413 into the electric vehicle from being damaged.
During charging, the charging currents of the first power battery pack 301 and the second power battery pack 302 are detected through the first shunt FL1 and the second shunt FL2, respectively, so as to prevent the first power battery pack 301 and the second power battery pack 302 from being damaged by abnormal charging currents.
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 switch device to be turned on or turned off, and the first switch device is used for controlling the first power battery pack and the second power battery pack to be turned on or turned off with the power supply loop of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
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 or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several 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 comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform 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 switch device to be turned on or turned off, and the first switch device is used for controlling the first power battery pack and the second power battery pack to be turned on or turned off with the power supply loop of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
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, is implemented to perform the above-provided power supply method for an electric vehicle, 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 switch device to be closed or opened, and the first switch device is closed or opened for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the power supply circuit of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
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 position, or may be distributed on multiple 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. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various 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 switch device to be closed or opened, and the first switch device is closed or opened for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the power supply circuit of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
2. The power supply method for an electric vehicle according to claim 1, wherein the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on power consumption amounts of the respective electric devices of the electric vehicle; the capacity of the first power battery pack is larger than that of the second power battery pack.
3. The method according to claim 1, wherein the first power battery pack and the second power battery pack are charged by a charging device using different voltage levels.
4. The power supply method for an electric vehicle according to any one of claims 1 to 3, characterized in that the first power battery pack and the second power battery pack are 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 first power battery pack or the second 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; and 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 charging loop of the first power battery pack or the second power battery pack to be connected or disconnected.
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 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.
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 switch device to be turned on or turned off, and the first switch device is used for controlling the first power battery pack and the second power battery pack to be turned on or turned off with the power supply loop of the corresponding electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used for supplying power for different electric equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electric equipment.
8. An electric vehicle, characterized by comprising: the power supply comprises a first power battery pack, a second power battery pack, electric equipment, a first switch device and a control device;
the first power battery pack and the second power battery pack are respectively used for supplying power to different electric equipment; the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platforms of the corresponding electric equipment;
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 switch device to be closed or opened, and the first switch device is used for controlling the first power battery pack and the second power battery pack to be connected or disconnected with the corresponding power supply loop of the electric equipment.
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.
CN202211117571.4A 2022-09-14 2022-09-14 Power supply method and device for electric vehicle and electric vehicle Pending CN115447382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211117571.4A CN115447382A (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
CN202211117571.4A CN115447382A (en) 2022-09-14 2022-09-14 Power supply method and device for electric vehicle and electric vehicle

Publications (1)

Publication Number Publication Date
CN115447382A true CN115447382A (en) 2022-12-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
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