CN117429310A - Electric vehicle, voltage control method and device thereof, storage medium and terminal - Google Patents

Electric vehicle, voltage control method and device thereof, storage medium and terminal Download PDF

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Publication number
CN117429310A
CN117429310A CN202210815088.7A CN202210815088A CN117429310A CN 117429310 A CN117429310 A CN 117429310A CN 202210815088 A CN202210815088 A CN 202210815088A CN 117429310 A CN117429310 A CN 117429310A
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China
Prior art keywords
electric vehicle
voltage
altitude
battery
power
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CN202210815088.7A
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Chinese (zh)
Inventor
市川真士
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Toyota Motor Corp
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Toyota Motor Corp
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Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to CN202210815088.7A priority Critical patent/CN117429310A/en
Publication of CN117429310A publication Critical patent/CN117429310A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/60—Navigation input
    • B60L2240/66—Ambient conditions

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

An electric vehicle, a voltage control method and device thereof, a storage medium and a terminal, wherein the electric vehicle comprises an electric motor and a storage battery, the storage battery is used for providing output voltage, the electric motor is powered by the output voltage, and the method comprises the following steps: and adjusting the input power of the storage battery according to the altitude of the electric vehicle. The method provided by the invention can realize proper control of the voltage of the vehicle system.

Description

Electric vehicle, voltage control method and device thereof, storage medium and terminal
Technical Field
The invention relates to the technical field of electric vehicles, in particular to an electric vehicle and a voltage control method, a device, a storage medium and a terminal thereof.
Background
Electric vehicles such as pure electric vehicles (Battery Electric Vehicle, BEV), hybrid electric vehicles (Hybrid Electric Vehicle, HEV), and fuel cell electric vehicles (Fuel Cell Electric Vehicle, FCEV) are generally configured with an electric motor and a battery, and the battery can be used to supply power to the electric motor to drive the vehicle. In general, since a high-voltage system unit has an expected operating voltage range, it is necessary to appropriately control a voltage according to a state of the system.
Disclosure of Invention
The technical problem solved by the invention is to protect the high-voltage system unit by properly controlling the system voltage according to the altitude.
To solve the above technical problem, an embodiment of the present invention provides a voltage control method for an electric vehicle, where the electric vehicle includes a motor and a storage battery, the storage battery is used to provide an output voltage, the motor is powered by the output voltage, and the method includes: and adjusting the input power of the storage battery according to the altitude of the electric vehicle.
To solve the above technical problem, an embodiment of the present invention provides another voltage control method for an electric vehicle, where the electric vehicle includes a motor, a storage battery, and a charger, the storage battery is used to provide an output voltage, the motor is powered by the output voltage, and the charger is used to externally charge, and the method includes: and adjusting the SOC upper limit value and the input power of the storage battery according to the altitude of the electric vehicle.
Optionally, before adjusting the input power of the storage battery according to the altitude of the electric vehicle, the method further includes: and determining the altitude of the electric vehicle according to the air pressure detected by the air pressure sensor.
Optionally, before adjusting the SOC upper limit value of the storage battery and the input power according to the altitude of the electric vehicle, the method further includes: and determining the altitude of the electric vehicle according to the air pressure detected by the air pressure sensor.
Optionally, the method further comprises: when the air pressure is equal to or lower than a predetermined air pressure and/or the altitude is equal to or higher than a predetermined altitude, no charging is performed.
The embodiment of the invention also provides a voltage control device of an electric vehicle, the electric vehicle comprises a motor and a storage battery, the storage battery is used for providing output voltage, the motor is powered by the output voltage, and the device comprises: the first power adjustment module is used for adjusting the input power of the storage battery according to the altitude of the electric vehicle.
The embodiment of the invention also provides a voltage control device of another electric vehicle, the electric vehicle comprises a motor and a storage battery, the storage battery is used for providing output voltage, the motor is powered by the output voltage, the device comprises: and the second power adjustment module is used for adjusting the SOC upper limit value and the input power of the storage battery according to the altitude of the electric vehicle.
The embodiment of the invention also provides a storage medium, on which a computer program is stored, which when being run by a processor, executes the steps of the voltage control method of the electric vehicle.
The embodiment of the invention also provides a terminal, which comprises a memory and a processor, wherein the memory stores a computer program which can be run on the processor, and the processor executes the steps of the voltage control method of the electric vehicle when running the computer program.
The embodiment of the invention also provides an electric vehicle, which comprises: a battery for providing an output voltage; a motor powered by the output voltage; and the terminal is used for executing the steps of the electric vehicle voltage control method.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the input power of the storage battery is adjusted according to the altitude of the electric vehicle, so that the system voltage is appropriately adjusted, and the voltage applied to each high-voltage component is appropriately suppressed.
Drawings
FIG. 1 is a schematic circuit diagram of a prior art voltage control method for an electric vehicle;
FIG. 2 is a schematic circuit diagram of a voltage control method of an electric vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a voltage control method of an electric vehicle according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a mapping between suitable voltage and altitude for a high voltage system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a mapping relationship between a high voltage system voltage and output power of a battery according to an embodiment of the present invention;
FIG. 6 is a flow chart of another method for controlling voltage of an electric vehicle according to an embodiment of the invention;
FIG. 7 is a schematic diagram of a mapping relationship between a high voltage system voltage and a state of charge of a battery according to an embodiment of the present invention;
FIG. 8 is a flowchart of a voltage control method of yet another electric vehicle in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a voltage control device of an electric vehicle according to an embodiment of the present invention.
Detailed Description
As described in the background art, there is a need for a voltage control method of an electric vehicle that can appropriately control the system voltage and suppress the voltage applied to each high-voltage component within an appropriate range.
Referring to fig. 1, fig. 1 is a circuit schematic diagram of a voltage control method of an electric vehicle in the prior art. As shown in fig. 1, in the prior art, it is generally necessary to boost the output voltage of the battery 10 by a boost converter and then supply power to the motor 20.
Specifically, the output voltage of the existing battery 10 is generally low, and the voltage required by the motor 20 is generally high. Since the voltage required for the motor 20 is as high as several hundred volts, the output voltage of the battery 10 needs to be input to a boost converter to be boosted, and the motor 20 needs to be supplied with power from the output voltage of the boost converter.
With such a configuration, the output voltage of the boost converter can be controlled by adjusting the boost ratio of the boost converter, so that the voltage of the high-voltage system can be controlled within an appropriate range.
With this system, in the case where the battery voltage is equal to the motor drive voltage, the output voltage directly supplied from the battery 10 can supply the motor 20 without a step-up circuit. Referring to fig. 2, fig. 2 is a circuit schematic diagram of a voltage control method of an electric vehicle according to an embodiment of the invention. As shown in fig. 2, in the embodiment of the present invention, the output voltage of the battery 10 is directly supplied to the motor 20 without being boosted by the boost converter. Specifically, the motor 20 is directly supplied with the output voltage supplied from the battery 10. At this time, V H ＝V B Wherein V is H V is the input voltage to the motor 20 B An output voltage provided to the battery 10. Thus, in the embodiment of the present invention, the voltage of the high-voltage system is equal to the output voltage of the battery 10, and the voltage of the high-voltage system is also equal to the voltage of the motor 20.
In such a scenario, how to properly control the voltage applied to the high voltage system is a problem addressed by embodiments of the present invention.
In order to solve the technical problems, the embodiment of the invention provides a voltage control method of an electric vehicle. In the scheme of the embodiment of the invention, the input power of the storage battery is adjusted according to the altitude of the electric vehicle so as to control the system voltage provided by the storage battery to be in an allowable range for the whole high-voltage system.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with the present invention are described in detail below.
Referring to fig. 3, fig. 3 is a flowchart of a voltage control method of an electric vehicle according to an embodiment of the present invention, which may be performed by a terminal, which is an electronic control unit (Electronic Control Unit, ECU) or the like on the electric vehicle. The voltage control method of the electric vehicle shown in fig. 3 may include the steps of:
step S301: and adjusting the input power of the storage battery according to the altitude of the electric vehicle.
The appropriate voltage for the high voltage system is a function of altitude, i.e. barometric pressure.
Referring to fig. 4, fig. 4 is a schematic diagram showing a relationship between a suitable voltage and altitude of a high voltage system according to an embodiment of the present invention. Specifically, fig. 4 shows the relationship between the appropriate voltage of the high voltage system and the altitude at which the electric vehicle is located. It will be appreciated that the greater the altitude at which the electric vehicle is located, the less the air pressure and the lower the appropriate voltage for the high voltage system. As shown in fig. 4, the altitude at which the electric vehicle is located is H m When the voltage of the high-voltage system is V m The altitude of the electric vehicle is increased to H' m When the voltage of the high-voltage system is V' m Wherein V' m ＜V m 。
In implementations, the altitude at which the electric vehicle is currently located may be determined. In one specific example, the altitude at which the electric vehicle is currently located may be obtained from a navigation system configured with the electric vehicle. In another specific example, an air pressure sensor is arranged on the electric vehicle, so that air pressure detected by the air pressure sensor can be obtained, and then the current altitude of the electric vehicle is determined according to the air pressure detected by the air pressure sensor.
Further, a mapping relationship between the suitable voltage of the high voltage system and the altitude may be read, and the mapping relationship may be preset.
Further, the current suitable voltage of the high-voltage system can be determined according to the mapping relation between the suitable voltage of the high-voltage system and the altitude of the electric vehicle and the current altitude of the electric vehicle.
Further, if the current proper voltage of the high voltage system is less than or equal to the maximum value of the high voltage system voltage, the input power of the battery may be adjusted to appropriately control the current proper voltage of the high voltage system. As shown in fig. 4, if the current altitude of the motor is H' m The input power to the battery is adjusted so that the voltage of the high voltage system does not exceed the current desired voltage V' m 。
On the other hand, when the electric vehicle is in a running state and the electric vehicle regeneratively brakes (Regenerative Brake), the storage battery is in a charged state. In other words, in order to control the voltage of the high-voltage system within an appropriate range, the maximum input power of the battery may be appropriately controlled according to the altitude at which the electric vehicle is currently located.
The maximum input power acceptable by the storage battery at present is the maximum power which is allowed to be input by the storage battery at present.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a mapping relationship between a voltage of a high voltage system and an output power of a battery according to an embodiment of the present invention.
In the implementation of step S301, the current suitable voltage of the high-voltage system may be determined according to the current altitude of the electric vehicle, and then the maximum value of the current acceptable input power of the storage battery is appropriately controlled, so that the input power of the storage battery is appropriately controlled during the regenerative braking process, so as to appropriately control the voltage of the high-voltage system during the regenerative braking process.
With reference to fig. 4 and 5, the altitude at which the electric vehicle is located is H m When storing upThe maximum value of the acceptable input power of the battery is P 1 The maximum value of the voltage of the corresponding high-voltage system is V m . The altitude of the electric vehicle is increased to H' m When the maximum value of the acceptable input power of the storage battery needs to be reduced to P 1 'such that the maximum value of the high voltage system voltage is V' m . Thus, when the input power of the battery does not exceed the upper limit value, the high-voltage system voltage does not exceed the upper limit value.
Further, it may be determined whether the regenerated electric power generated by the motor is less than or equal to the maximum value of the input electric power currently acceptable by the battery, and if so, the regenerated electric power generated by the motor may be all transmitted to the battery, otherwise, a portion of the regenerated electric power generated by the motor having the maximum value of the input electric power currently acceptable by the battery may be transmitted to the battery, and then a portion of the regenerated electric power generated by the motor exceeding the maximum value of the input electric power currently acceptable by the battery may be used as the regenerated electric power that the energy consuming device needs to absorb, and the regenerated electric power that the energy consuming device needs to absorb may be transmitted to the power controller, so that the power controller transmits the received regenerated electric power to the connected energy consuming device. That is, the regenerated power that the energy consuming device needs to absorb is the difference of the regenerated power generated by the motor minus the maximum value of the currently acceptable input power to the battery.
Specifically, the electric vehicle may include a plurality of power controllers, wherein an output of each power controller is connected to one or more energy consuming devices. The energy consumption device is, but not limited to, a PTC (positive temperature coefficient ) heater. More specifically, the energy consuming device may be used only to absorb or consume regenerative power generated during regenerative braking of the motor
In a first specific example, the regenerated power that the energy consuming device needs to absorb may be equally distributed to the individual power controllers. Further, for each power controller, the received regenerated power can be distributed to the energy consumption devices connected with the power controller again in an average way; the received regenerated power may also be preferentially transmitted to the energy-consuming device with a high priority, where the priority of the energy-consuming device may be determined according to the regenerated power that the energy-consuming device is able to absorb.
In a second specific example, an electric vehicle may include a plurality of power controllers, wherein the plurality of power controllers includes: a power controller for driving and a power controller for non-driving. The power controller for driving is a power controller for supplying electric power to the motor, and the power controller for non-driving is a power controller for supplying electric power to in-vehicle electrical equipment (for example, air conditioning equipment). In other words, the non-driving power controller is a power controller that is not used to supply electric power to the motor.
Further, the regenerative power that the energy-consuming device needs to absorb can be preferentially transmitted to the non-driving power controller, and the regenerative power that the non-driving power controller cannot absorb can be transmitted to the driving power controller.
More specifically, if there are a plurality of power controllers for non-driving, regenerative power that the energy consuming device needs to absorb can be preferentially transmitted to the power controller with a high priority. The priority of the power controller may be determined according to the load power of the power controller, where the higher the load power, the lower the priority. In other words, among the plurality of power controllers, the priority of the power controller for driving is smallest.
Further, for each power controller, the received regenerated power can be distributed to the energy consumption devices connected with the power controller again in an average way; the received regenerated power may be preferentially transmitted to the energy-consuming device with a high priority.
In a third specific example, a plurality of power controllers may be located in the same cooling circuit, and the cooling performance of the power controllers may be determined according to the flow sequence of the cooling liquid. Wherein, the earlier the power controller through which the cooling liquid flows, the higher the cooling performance of the power controller. In other words, for the power controller, the more upstream the position in the cooling circuit, the higher the cooling performance.
Further, the regenerated electric power that the energy-consuming device needs to absorb may be sequentially transmitted to at least one power controller in order of high to low cooling performance of the power controller in the cooling circuit. In other words, the regenerative power that the energy consuming device needs to absorb can be preferentially transmitted to the power controller with high cooling performance in the cooling circuit. For each power controller, the received regenerated power can be distributed to the energy consumption devices connected with the power controller again and evenly; the received regenerated power may be preferentially transmitted to the energy-consuming device with a high priority.
Therefore, in the running process of the electric vehicle, the input power of the storage battery can be adjusted according to the current altitude of the electric vehicle, so that the output voltage provided by the storage battery does not exceed the proper voltage of the high-voltage system corresponding to the current altitude.
Referring to fig. 6, fig. 6 is a flowchart of another voltage control method of an electric vehicle according to an embodiment of the present invention, and the voltage control method of an electric vehicle shown in fig. 6 may include:
step S601: and adjusting the SOC upper limit value and the input power of the storage battery according to the altitude of the electric vehicle.
Specifically, in the voltage control method shown in fig. 6, the upper limit value of the State of Charge (SOC) and the input power of the battery in the externally charged State of the electric vehicle are adjusted. The external charging state refers to that a power supply outside the electric vehicle is used for charging the storage battery. More specifically, the electric vehicle may include a charger for external charging, that is, the charger is used to transfer electric power supplied from an external power source to the storage battery.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a mapping relationship between a voltage of a high voltage system and an SOC of a battery in an embodiment of the present invention.
In the implementation of step S601, the current suitable voltage of the high-voltage system may be determined according to the current altitude of the electric vehicle, and then the current SOC upper limit value of the storage battery and the input power in the charging process of the storage battery may be reduced, so as to control the voltage of the high-voltage system to the current suitable voltage.
With reference to fig. 4 and 7, electricityThe altitude of the motor car is H m When the upper limit value of the SOC of the storage battery is SOC 1 The maximum value of the voltage of the corresponding high-voltage system is V m . When the altitude of the electric vehicle is increased to H' m In this case, it is necessary to reduce the SOC upper limit value of the battery to SOC' 1 So that the maximum value of the high-voltage system voltage is V' m . Thus, when the SOC of the battery does not exceed the SOC upper limit value SOC' 1 In this case, the maximum value of the high-voltage system voltage does not exceed the upper limit value.
In the implementation, the current proper voltage of the high-voltage system can be determined according to the current altitude of the electric vehicle. Further, the current SOC upper limit value of the battery may be determined based on the current maximum value of the high-voltage system voltage. Specifically, a lookup table method may be used to determine the current upper limit value of the SOC of the battery. More specifically, a preset mapping relationship between the high-voltage system voltage and the SOC of the battery may be read, and the current SOC upper limit value of the battery may be determined according to the current maximum value of the high-voltage system voltage and the mapping relationship.
Further, the input power of the battery in the external charging process may be determined according to the current SOC upper limit value of the battery. Wherein the input power of the battery during external charging is varied with the variation of the SOC of the battery. In the external charging process, the storage battery can be charged according to the input power of the storage battery in the determined external charging process, and when the SOC of the storage battery reaches the current SOC upper limit value of the storage battery, the external charging is stopped.
Because the current SOC upper limit value of the storage battery is determined according to the current altitude of the electric vehicle, the input power of the storage battery in the external charging process determined according to the current SOC upper limit value is also determined according to the current altitude of the electric vehicle. The charging is performed according to the determined input power of the storage battery in the external charging process, so that the voltage of the high-voltage system in the external charging process does not exceed the current proper voltage.
Further, in the case where the altitude at which the electric vehicle is located is above a prescribed altitude and/or when the air pressure is below a prescribed air pressure, charging may not be performed. Specifically, since the SOC upper limit value decreases with an increase in height, when the altitude at which the electric vehicle is located is equal to or higher than a predetermined altitude, even if the current SOC is less than 100%, the electric vehicle is in a fully charged state (that is, the SOC reaches the upper limit value).
Fig. 7 shows, by way of example only, the map between the voltage of the high-voltage system and the SOC of the battery, and more specifically, fig. 7 shows the map between the voltage of the high-voltage system using the lithium phosphate battery and the SOC. In other embodiments, other types of batteries may be used, and this embodiment is not limiting.
Referring to fig. 8, fig. 8 is a flowchart of a voltage control method of another electric vehicle according to an embodiment of the present invention, and the voltage control method according to the embodiment is described in non-limiting manner with reference to fig. 8.
In the running process of the electric vehicle, step S801 may be performed at preset time intervals, that is, whether the air pressure is less than a preset value may be determined at preset time intervals, where the preset value may be preset.
If the air pressure is less than the preset value, step S802 may be performed, that is, it may be determined whether the electric vehicle is traveling. If so, step S803 may be performed, i.e., reducing the maximum value of the currently acceptable input power to the battery so that the voltage of the high voltage system does not exceed the currently appropriate voltage of the high voltage system.
Further, step S804 may be performed, that is, it may be determined whether the regenerated electric power generated by the motor is greater than the maximum value of the input electric power that is currently acceptable to the battery. More specifically, it may be determined whether the regenerated electric power generated by the motor is greater than the maximum value of the reduced current acceptable input electric power.
Further, if the regenerated electric power generated by the motor is greater than the maximum value of the input electric power that is currently acceptable to the storage battery, step S805 may be performed, that is, the regenerated electric power that the energy consuming device needs to absorb is transmitted to the power controller, so that the power controller transmits the received regenerated electric power to the energy consuming device. If the regenerated electric power generated by the motor is not greater than the maximum value of the currently acceptable input electric power of the battery, the regenerated electric power generated by the motor may be transmitted to the battery.
If the electric vehicle is not in the process of traveling, step S806 may be performed, that is, it may be determined whether the electric vehicle is in the process of external charging. If so, step S807 may be performed, i.e., the SOC upper limit value of the battery is reduced so that the voltage of the high voltage system does not exceed the current proper voltage of the high voltage system.
Further, step S808 may be performed, that is, the input power of the secondary battery during external charging may be reduced. Specifically, the input power of the battery during external charging may be determined based on the reduced SOC upper limit value of the battery.
Further, the battery may be charged in accordance with the input power of the battery during the external charging determined in step S808, and the external charging may be stopped when the SOC of the battery reaches the reduced SOC upper limit value of the battery.
For more details regarding the voltage control method of the electric vehicle shown in fig. 8, reference may be made to the above related description, and the description is omitted herein.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a voltage control apparatus for an electric vehicle according to an embodiment of the present invention. It is understood by those skilled in the art that the voltage control device of an electric vehicle according to the present embodiment is used for implementing the voltage control method of an electric vehicle described above. As shown in fig. 9, the apparatus shown in fig. 9 may include:
the first power adjustment module 91 is configured to adjust the input power of the storage battery according to the altitude of the electric vehicle.
In other embodiments, a voltage control apparatus of an electric vehicle may include: and a second power adjustment module (not shown in fig. 9) that can be used to adjust the SOC upper limit value and the input power of the battery according to the altitude at which the electric vehicle is located.
For more matters such as the working principle, the working manner and the beneficial effects of the voltage control device of the electric vehicle shown in fig. 9, reference may be made to the above related description, and the details are not repeated here.
The embodiment of the invention also provides a storage medium, which is a nonvolatile storage medium or a non-transient storage medium, and a computer program is stored on the storage medium, and the computer program executes the steps of the voltage control method of the electric vehicle provided by any embodiment of the invention when being run by a processor.
The embodiment of the invention also provides a terminal, which comprises a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the steps of the voltage control method of the electric vehicle provided by any embodiment of the invention when running the computer program.
The embodiment of the invention also provides an electric vehicle, which comprises a storage battery, a motor and a terminal, wherein the storage battery is used for providing output voltage, the motor is powered by the output voltage, and the terminal is used for executing the steps of the electric vehicle voltage control method.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in any computer readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, etc.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" indicates that the front and rear associated objects are an "or" relationship.
The term "plurality" as used in the embodiments herein refers to two or more.
The first, second, etc. descriptions in the embodiments of the present application are only used for illustrating and distinguishing the description objects, and no order division is used, nor does it indicate that the number of the devices in the embodiments of the present application is particularly limited, and no limitation on the embodiments of the present application should be construed.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (10)

1. A voltage control method of an electric vehicle, the electric vehicle including an electric motor and a battery for providing an output voltage, the electric motor being powered by the output voltage, the method comprising:
and adjusting the input power of the storage battery according to the altitude of the electric vehicle.
2. A voltage control method of an electric vehicle, the electric vehicle including a motor, a battery for providing an output voltage, the motor being powered by the output voltage, and a charger for external charging, the method comprising:
and adjusting the SOC upper limit value and the input power of the storage battery according to the altitude of the electric vehicle.
3. The method for controlling voltage of an electric vehicle according to claim 1, further comprising, before adjusting the input power of the battery according to the altitude at which the electric vehicle is located:
and determining the altitude of the electric vehicle according to the air pressure detected by the air pressure sensor.
4. The method according to claim 2, further comprising, before adjusting the SOC upper limit value of the battery and the input power according to an altitude at which the electric vehicle is located:
and determining the altitude of the electric vehicle according to the air pressure detected by the air pressure sensor.
5. The method for controlling voltage of an electric vehicle according to claim 2, characterized in that the method further comprises:
when the air pressure is equal to or lower than a predetermined air pressure and/or the altitude is equal to or higher than a predetermined altitude, no charging is performed.
6. A voltage control apparatus for an electric vehicle, the electric vehicle including an electric motor and a battery for providing an output voltage, the electric motor being powered by the output voltage, the apparatus comprising:
the first power adjustment module is used for adjusting the input power of the storage battery according to the altitude of the electric vehicle.
7. A voltage control apparatus for an electric vehicle, the electric vehicle including an electric motor and a battery for providing an output voltage, the electric motor being powered by the output voltage, the apparatus comprising:
and the second power adjustment module is used for adjusting the SOC upper limit value and the input power of the storage battery according to the altitude of the electric vehicle.
8. A storage medium having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, performs the steps of the voltage control method of an electric vehicle according to any one of claims 1 to 5.
9. A terminal comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, characterized in that the processor executes the steps of the electric vehicle voltage control method according to any of claims 1 to 5 when the computer program is executed.
10. An electric vehicle, comprising:
a battery for providing an output voltage;
a motor powered by the output voltage;
a terminal for performing the steps of the electric vehicle voltage control method according to any one of claims 1 to 5.
CN202210815088.7A 2022-07-12 2022-07-12 Electric vehicle, voltage control method and device thereof, storage medium and terminal Pending CN117429310A (en)

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CN202210815088.7A CN117429310A (en) 2022-07-12 2022-07-12 Electric vehicle, voltage control method and device thereof, storage medium and terminal

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CN117429310A true CN117429310A (en) 2024-01-23

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