CN112124144B - Pure electric vehicle, storage battery power supplementing method and system thereof and storage medium - Google Patents

Pure electric vehicle, storage battery power supplementing method and system thereof and storage medium Download PDF

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Publication number
CN112124144B
CN112124144B CN202010859204.6A CN202010859204A CN112124144B CN 112124144 B CN112124144 B CN 112124144B CN 202010859204 A CN202010859204 A CN 202010859204A CN 112124144 B CN112124144 B CN 112124144B
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power
battery
vehicle
voltage
storage battery
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CN112124144A (en
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郑文龙
郑怡生
芮开闩
刘琳
沙文瀚
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Chery New Energy Automobile Co Ltd
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Chery New Energy Automobile Co Ltd
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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
    • 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
    • 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
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a pure electric vehicle and a storage battery power supplementing method, a system and a storage medium thereof, wherein the power supplementing method comprises the following steps: when the pure electric vehicle is in a defense setting state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal is awakened; the vehicle-mounted terminal acquires the voltage of the storage battery in real time; when the voltage of the storage battery is smaller than a first preset voltage, the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle so as to supplement power to the storage battery through a DC/DC converter of the pure electric vehicle; and when the voltage of the storage battery is greater than or equal to a first preset voltage, the standby battery is supplemented through a power management module in the vehicle-mounted terminal. The method can realize effective power supply control on the storage battery, thereby effectively preventing the risk of power supply of the storage battery, avoiding repeated power supply and power supply of the storage battery and saving energy.

Description

Pure electric vehicle, storage battery power supplementing method and system thereof and storage medium
Technical Field
The invention relates to the field of pure electric vehicles, in particular to a storage battery power supplementing method of a pure electric vehicle, a storage battery power supplementing system of a pure electric vehicle, a computer readable storage medium and a pure electric vehicle.
Background
In recent years, pure electric vehicles have developed rapidly under the support of national and local policies. However, the pure electric vehicle can generate a storage battery feeding phenomenon in daily use, and if the vehicle feeds power and the vehicle owner does not know in advance, and needs to use the vehicle urgently, a lot of troubles are brought to the vehicle owner.
Therefore, a charging method of a low-voltage storage battery is provided in the related art, whether the storage battery feeds power or not is actively monitored after the low-voltage storage battery management system counts time and reaches a first preset time, if the storage battery feeds power, the management system sends a power supplementing request to enable high voltage on a whole vehicle to supplement the power to the storage battery, however, the technical scheme cannot monitor whether the storage battery feeds power or not in real time, and the risk of the storage battery feeding does not reach the preset time exists. The related technology also provides an intelligent electricity supplementing method for the storage battery of the new energy electric vehicle, the voltage of the storage battery is detected in real time, if the voltage is smaller than a preset value and a battery management system has no fault, the whole vehicle controls DC/DC to supplement electricity for the storage battery, however, the voltage of the storage battery needs to be detected by a monitoring module in real time in the technical scheme, and when the fortification time of the whole vehicle is long, the storage battery is repeatedly fed and supplemented, and energy is wasted.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a battery power supplementing method for a pure electric vehicle. The method can realize effective power supply control on the storage battery, thereby effectively preventing the risk of power supply of the storage battery, avoiding repeated power supply and power supply of the storage battery and saving energy.
The second purpose of the invention is to provide a storage battery power supplementing system of a pure electric vehicle.
A third object of the invention is to propose a computer-readable storage medium.
The fourth purpose of the invention is to provide a pure electric automobile.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a battery power supplement method for a pure electric vehicle, where the pure electric vehicle includes a battery, a backup battery, and a relay, the relay includes a relay coil and a relay contact, the relay coil is connected between a positive electrode of the battery and a positive electrode of the backup battery, and the relay contact is connected between the positive electrode of the battery and a vehicle-mounted terminal of the pure electric vehicle, and the method includes the following steps: when the pure electric vehicle is in a fortifying state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal is awakened; the vehicle-mounted terminal acquires the voltage of the storage battery in real time; when the voltage of the storage battery is smaller than a first preset voltage, the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle so as to supplement power to the storage battery through a DC/DC converter of the pure electric vehicle; and when the voltage of the storage battery is greater than or equal to the first preset voltage, the standby battery is supplemented through a power management module in the vehicle-mounted terminal.
According to the battery power supplementing method of the pure electric vehicle, the effective power supplementing control of the battery can be realized, so that the battery feeding risk can be effectively prevented, the repeated feeding and power supplementing of the battery can be avoided, and the energy is saved.
In addition, the battery power supplement method for the pure electric vehicle according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle so as to supplement power to the storage battery through a DC/DC converter of the pure electric vehicle, and the method comprises the following steps: the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle; the vehicle controller controls a high-voltage power supply switch of the pure electric vehicle to be closed according to the power supplementing request so as to awaken a plurality of high-voltage electronic control units of the pure electric vehicle, wherein the plurality of high-voltage electronic control units comprise a battery management system and a DC/DC controller; the vehicle controller sends the power supplementing request to the battery management system; the battery management system controls the conduction of a loop where the DC/DC converter is located according to the power supplementing request; the vehicle controller controls the DC/DC converter to work through the DC/DC controller so as to realize that the power battery of the pure electric vehicle supplements power for the storage battery.
According to an embodiment of the invention, the method further comprises: the DC/DC controller feeds back the electricity supplementing state of the storage battery to the vehicle controller; after the vehicle controller judges that the power supply of the storage battery is successful according to the power supply state and the vehicle-mounted terminal judges that the relay contact is disconnected, the vehicle-mounted terminal sends a power supply closing request to the vehicle controller; the vehicle controller controls the DC/DC converter to stop working through the DC/DC controller according to the power supplementing closing request so as to stop the power battery from supplementing power to the storage battery; after the DC/DC converter stops working, the vehicle controller sends the high-voltage power-off command to the battery management system; and the battery management system controls the circuit where the DC/DC converter is located to be disconnected according to the high-voltage power-down instruction.
According to an embodiment of the invention, the method further comprises: after the vehicle controller judges that the power supplement of the storage battery is unsuccessful according to the power supplement state, the vehicle controller sends the high-voltage power-off instruction to the battery management system; the battery management system controls a loop where the DC/DC converter is located to be disconnected according to the high-voltage power-down instruction; after the loop where the DC/DC converter is located is disconnected, the vehicle controller controls the high-voltage power supply switch to be disconnected and re-executes a compensation control process; and when the vehicle-mounted terminal determines that the relay contact is not disconnected, the vehicle controller continuously controls the DC/DC converter to work through the DC/DC controller.
According to an embodiment of the invention, the supplementing the standby battery through a power management module in the vehicle-mounted terminal includes: the vehicle-mounted terminal acquires the voltage of the standby battery in real time; and when the voltage of the standby battery is smaller than a second preset voltage, controlling the power supply management module to supplement the power of the standby battery until the voltage of the standby battery is larger than or equal to the second preset voltage.
According to one embodiment of the invention, after receiving the power supplement request, the battery management system performs self-check on the self-state; when the battery management system has no fault through self-test, controlling a loop where the DC/DC converter is located to be conducted; and when the battery management system is subjected to self-checking, the vehicle controller controls the high-voltage power supply switch to be switched off.
According to one embodiment of the invention, after the vehicle controller controls the high-voltage power supply switch to be closed, whether a high-voltage system of the pure electric vehicle has a fault is judged; when the high-voltage system has no fault, sending the power supplementing request to the battery management system; and when the high-voltage system has a fault, controlling the high-voltage power supply switch to be switched off.
In order to achieve the above object, a second embodiment of the present invention provides a battery recharging system for a pure electric vehicle, where the pure electric vehicle includes a battery and a backup battery, and the system includes a relay, a vehicle-mounted terminal, a vehicle controller, and a DC/DC converter, where the relay includes a relay coil and a relay contact, the relay coil is connected between a positive electrode of the battery and a positive electrode of the backup battery, and the relay contact is connected between the positive electrode of the battery and the vehicle-mounted terminal; when the pure electric vehicle is in a fortifying state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal is awakened; the vehicle-mounted terminal comprises a power management module, and is used for acquiring the voltage of the storage battery in real time, sending a power supplementing request to the vehicle controller when the voltage of the storage battery is smaller than a first preset voltage so as to supplement the power of the storage battery through the DC/DC converter, and supplementing the power of the standby battery through the power management module when the voltage of the storage battery is larger than or equal to the first preset voltage.
The storage battery power supply system of the pure electric vehicle can realize effective power supply control on the storage battery, thereby effectively preventing the risk of power feeding of the storage battery, avoiding repeated power feeding and power supply of the storage battery and saving energy.
In order to achieve the above object, a third embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the battery recharging method for the pure electric vehicle.
According to the computer-readable storage medium of the embodiment of the invention, when the computer program stored on the computer-readable storage medium and corresponding to the battery power supplement method of the pure electric vehicle is executed by the processor, the effective power supplement control on the battery can be realized, so that the battery power feeding risk can be effectively prevented, the repeated power feeding and power supplement of the battery can be avoided, and the energy is saved.
In order to achieve the above purpose, a fourth aspect of the present invention provides a pure electric vehicle, including the above battery power supply system of the pure electric vehicle.
According to the pure electric vehicle, when the storage battery power supplementing system of the pure electric vehicle is applied to the storage battery power supplementing method of the pure electric vehicle, the storage battery can be effectively supplemented and controlled, so that the storage battery feeding risk can be effectively prevented, the storage battery can be prevented from being repeatedly fed and supplemented, and energy is saved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a battery recharging method for a pure electric vehicle according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a battery recharging system of a pure electric vehicle according to one embodiment of the invention;
FIG. 3 is a work flow diagram of a battery recharging method of a pure electric vehicle according to one embodiment of the invention;
fig. 4 is a structural block diagram of a battery recharging system of a pure electric vehicle according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The pure electric vehicle, the battery power supplementing method, the battery power supplementing system and the storage medium thereof according to the embodiment of the invention are described below with reference to fig. 1 to 4.
In the embodiment of the invention, as shown in fig. 2, the pure electric vehicle comprises a storage battery 6, a backup battery 8 and a relay 7, the relay comprises a relay coil and a relay contact, the relay coil is connected between the positive pole of the storage battery 6 and the positive pole of the backup battery 8, and the relay contact is connected between the positive pole of the storage battery 6 and the vehicle-mounted terminal 1 of the pure electric vehicle.
Fig. 1 is a flowchart of a battery recharging method for a pure electric vehicle according to an embodiment of the present invention. As shown in fig. 1, the battery power supplement method for the pure electric vehicle includes the following steps:
s101, when the pure electric vehicle is in a defense state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal is awakened.
In the embodiment of the invention, the rated voltage of the backup battery is U1, the rated voltage of the storage battery is U2, the feeding voltage of the storage battery is U3, and the rated voltage of the relay is U4, namely U4 is U1-U3, wherein U2 is more than U1 and more than U3. As shown in fig. 2, when the voltage of the storage battery is reduced from U2 to U3, the voltage drop of the backup battery and the storage battery connected with the low-voltage control end of the relay reaches the rated voltage U4 of the relay, so that the high-voltage control end of the relay is conducted, and at the moment, the vehicle-mounted terminal detects that a hard-wire signal is input, and the vehicle-mounted terminal is awakened.
And S102, the vehicle-mounted terminal acquires the voltage of the storage battery in real time.
Specifically, after the vehicle-mounted terminal is awakened, the voltage of the storage battery can be detected in real time through the voltage detection circuit, and the voltage of the storage battery is obtained.
S103, when the voltage of the storage battery is smaller than the first preset voltage, the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle, so that the storage battery is supplemented through a DC/DC converter of the pure electric vehicle.
Specifically, as shown in fig. 3, after the vehicle-mounted terminal acquires the voltage of the storage battery, the voltage of the storage battery is compared with a first preset voltage, such as a feeding voltage U3 of the storage battery, when the acquired voltage of the storage battery is smaller than the first preset voltage, the vehicle-mounted terminal judges that the storage battery is fed, sends a power supplement request to the vehicle controller, and supplements the power to the storage battery through a DC/DC converter of the pure electric vehicle.
In one embodiment of the present invention, a vehicle-mounted terminal sends a power supplement request to a vehicle controller of a pure electric vehicle, so as to supplement power to a storage battery through a DC/DC converter of the pure electric vehicle, including: the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle; the vehicle controller controls a high-voltage power supply switch of the pure electric vehicle to be closed according to the power supplementing request so as to awaken a plurality of high-voltage electronic control units of the pure electric vehicle, wherein the plurality of high-voltage electronic control units comprise a battery management system and a DC/DC controller; the vehicle controller sends a power supplementing request to a battery management system; the battery management system controls the conduction of a loop where the DC/DC converter is located according to the power supplementing request; the vehicle controller controls the DC/DC converter to work through the DC/DC controller so as to realize the purpose that the power battery of the pure electric vehicle supplies power to the storage battery.
In one embodiment of the invention, after the vehicle controller controls the high-voltage power supply switch to be closed, whether a high-voltage system of the pure electric vehicle has a fault is judged; when the high-voltage system has no fault, sending a power supplementing request to a battery management system; and when the high-voltage system has a fault, the high-voltage power supply switch is controlled to be switched off.
In one embodiment of the invention, after receiving a power supplementing request, the battery management system carries out self-check on the self state; when the battery management system has no fault through self-checking, controlling the conduction of a loop where the DC/DC converter is located; when the self-checking of the battery management system is failed, the vehicle controller controls the high-voltage power supply switch to be switched off.
Specifically, as shown in fig. 3, after the vehicle controller receives the power supplement request, the vehicle controller may control the high-voltage power supply switch of the pure electric vehicle to be closed, so as to wake up the battery management system and the DC/DC controller. The vehicle controller can judge whether a high-voltage system of the pure electric vehicle has a fault after controlling the high-voltage power supply switch to be closed, when the high-voltage system has no fault, the vehicle controller sends a power supplementing request to the battery management system, and when the high-voltage system has the fault, the vehicle controller controls the high-voltage power supply switch to be disconnected and returns to execute the power supplementing control process again.
Further, the battery management system can detect the state of the battery management system after receiving a power supplementing request sent by the vehicle controller, and when the battery management system has no fault in self-detection, the line switch is closed so that a loop where the DC/DC converter is located works, and the state of the line switch is fed back to the vehicle controller. After the circuit switch is closed, the vehicle controller sends a power supplementing enabling signal to the DC/DC controller, and the DC/DC controller controls the DC/DC converter to work after receiving the power supplementing enabling signal, so that the power battery of the pure electric vehicle supplements power for the storage battery. When the battery management system detects a fault, the state of the battery management system is fed back to the vehicle controller, and the vehicle controller controls the high-voltage power supply switch to be switched off.
In one embodiment of the invention, the DC/DC controller feeds back the charging state of the storage battery to the vehicle controller; after the vehicle controller judges that the storage battery is successfully supplied with power according to the power supply state and the vehicle-mounted terminal judges that the relay contact is disconnected, the vehicle-mounted terminal sends a power supply closing request to the vehicle controller; the vehicle controller controls the DC/DC converter to stop working through the DC/DC controller according to the power supplementing closing request so as to stop the power battery from supplementing power to the storage battery; after the DC/DC converter stops working, the vehicle controller sends a high-voltage power-off command to the battery management system; and the battery management system controls the circuit of the DC/DC converter to be disconnected according to the high-voltage power-down command.
In one embodiment of the invention, after the vehicle controller determines that the power supplement of the storage battery is unsuccessful according to the power supplement state, the vehicle controller sends a high-voltage power-down instruction to the battery management system; the battery management system controls the circuit of the DC/DC converter to be disconnected according to the high-voltage power-down instruction; after the loop where the DC/DC converter is located is disconnected, the vehicle controller controls the high-voltage power supply switch to be disconnected and executes a power-supplementing control process again; and when the vehicle-mounted terminal judges that the relay contact is not disconnected, the vehicle controller continuously controls the DC/DC converter to work through the DC/DC controller.
Specifically, as shown in fig. 3, when the DC/DC controller controls the DC/DC converter to work to supplement power, the power supplementing state may be fed back to the vehicle controller, and the vehicle controller may determine whether the power supplementing of the storage battery is successful according to the power supplementing state, and if it is determined that the power supplementing of the storage battery is successful, the vehicle-mounted terminal further determines whether the relay is disconnected. And if the vehicle-mounted terminal judges that the relay contact is in a disconnected state, the vehicle-mounted terminal sends a power supplementing closing request to the vehicle controller. And after the vehicle controller receives the request, sending a compensation forbidding signal to the DC/DC controller to forbid the DC/DC converter to supply power to the storage battery, and after the system stops supplying power, sending a high-voltage power-down command to the battery management system, so that after the battery management system receives the high-voltage power-down command, the line switch is disconnected, and the state of the line switch is fed back to the vehicle controller. And after receiving the state, the vehicle controller controls to disconnect the high-voltage power supply switch and returns to execute the power supplementing control process again.
Further, when the vehicle controller judges that the power supplement of the storage battery is unsuccessful according to the power supplement state, the vehicle controller sends a high-voltage power-down instruction to the battery management system, and after the battery management system receives the high-voltage power-down instruction, the line switch is disconnected, and the state of the line switch is fed back to the vehicle controller. And after receiving the state, the vehicle controller controls the high-voltage power supply switch to be switched off, and returns to execute the power supplementing control process again.
Optionally, when the vehicle controller judges that the power supplement of the storage battery is successful according to the power supplement state, and the vehicle-mounted terminal further judges that the relay is still in the closed state, the vehicle controller continuously controls the DC/DC converter to supplement power to the storage battery through the DC/DC controller.
And S104, when the voltage of the storage battery is greater than or equal to a first preset voltage, the standby battery is supplemented through a power management module in the vehicle-mounted terminal.
In one embodiment of the invention, the method for supplementing power to the standby battery through the power management module in the vehicle-mounted terminal comprises the following steps: the vehicle-mounted terminal acquires the voltage of the standby battery in real time; and when the voltage of the standby battery is less than the second preset voltage, controlling the power supply management module to supplement power for the standby battery until the voltage of the standby battery is greater than or equal to the second preset voltage.
Specifically, after the vehicle-mounted terminal is awakened, when the voltage of the storage battery is detected to be greater than or equal to a first preset voltage, namely the storage battery feed voltage, through the voltage detection circuit, the storage battery does not feed power, and at the moment, the standby battery can be supplied with power through the power management module in the vehicle-mounted terminal. When the voltage of the storage battery changes very little, the whole vehicle can be determined to be in a complete dormant state.
In the embodiment of the invention, when the vehicle-mounted terminal judges that the storage battery does not supply power, the voltage detection circuit can be used for detecting the voltage of the backup battery and acquiring the voltage value of the backup battery, and further, the vehicle-mounted terminal can compare the acquired voltage value of the backup battery with a second preset voltage, namely the rated voltage value of the backup battery. When the voltage of the standby battery is smaller than the second preset voltage, the power supply management module is controlled to supplement the power of the standby battery, and when the voltage of the standby battery is larger than or equal to the second preset voltage, the vehicle-mounted terminal can control the relay to be disconnected and return to execute the power supplement control process again.
In summary, the storage battery power supply method of the pure electric vehicle in the embodiment of the invention can realize effective power supply control of the storage battery, thereby effectively preventing the risk of power feeding of the storage battery, avoiding repeated power feeding and power supply of the storage battery, and saving energy.
Fig. 4 is a structural block diagram of a battery recharging system of a pure electric vehicle according to an embodiment of the invention. The pure electric vehicle comprises a storage battery and a standby battery, and as shown in fig. 4, the storage battery recharging system 10 of the pure electric vehicle comprises a system comprising a relay 100, an on-board terminal 200, a vehicle controller 300 and a DC/DC converter 400.
The relay 100 comprises a relay coil and a relay contact, the relay coil is connected between the positive electrode of the storage battery and the positive electrode of the standby battery, and the relay contact is connected between the positive electrode of the storage battery and the vehicle-mounted terminal 200; when the pure electric vehicle is in a defense setting state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal 200 is awakened; the in-vehicle terminal 200 includes a power management module, and the in-vehicle terminal 200 is configured to obtain a voltage of the storage battery in real time, send a power supplement request to the vehicle controller 300 when the voltage of the storage battery is less than a first preset voltage, so as to supplement the power of the storage battery through the DC/DC converter 400, and supplement the power of the backup battery through the power management module when the voltage of the storage battery is greater than or equal to the first preset voltage.
In the embodiment of the invention, the rated voltage of the backup battery is U1, the rated voltage of the storage battery is U2, the feeding voltage of the storage battery is U3, and the rated voltage of the relay is U4, namely U4 is U1-U3, wherein U2 is more than U1 and more than U3. As shown in fig. 2, when the battery voltage drops from U2 to U3, the backup battery and the battery voltage drop connected to the low-voltage control terminal of the relay 100 reach the rated voltage U4 of the relay 100, so that the high-voltage control terminal of the relay 100 is turned on, and at this time, the vehicle-mounted terminal 200 detects that a hard-line signal is input, and the vehicle-mounted terminal 200 is awakened. After the vehicle-mounted terminal 200 is awakened, the voltage of the storage battery can be detected in real time through the voltage detection circuit, and the voltage of the storage battery is acquired.
Specifically, as shown in fig. 3, after the vehicle-mounted terminal 200 acquires the voltage of the storage battery, the voltage is compared with a first preset voltage, for example, the feeding voltage U3 of the storage battery, when the acquired voltage of the storage battery is smaller than the first preset voltage, the vehicle-mounted terminal 200 judges that the storage battery is fed, the vehicle-mounted terminal 200 sends a power supplement request to the vehicle controller 300, and the storage battery is supplemented with power through the DC/DC converter 400 of the pure electric vehicle.
In the embodiment of the present invention, after the vehicle-mounted terminal 200 wakes up, when the voltage of the battery detected by the voltage detection circuit is greater than or equal to the first preset voltage, that is, the battery feeding voltage, the battery does not feed power, and at this time, the power management module in the vehicle-mounted terminal 200 can supplement power to the backup battery. When the voltage of the storage battery changes very little, the whole vehicle can be determined to be in a complete dormant state.
In the embodiment of the present invention, when the vehicle-mounted terminal 200 determines that the battery is not feeding, the voltage detection circuit may further detect the voltage of the backup battery and obtain the voltage value of the backup battery, and further, the vehicle-mounted terminal 200 may compare the obtained voltage value of the backup battery with a second preset voltage, that is, the rated voltage value of the backup battery. When the voltage of the standby battery is less than the second preset voltage, the power management module is controlled to supplement the power of the standby battery, and when the voltage of the standby battery is greater than or equal to the second preset voltage, the vehicle-mounted terminal 200 can control the relay 100 to be disconnected and return to re-execute the power supplement control process.
In summary, the storage battery power supply system of the pure electric vehicle provided by the embodiment of the invention can realize effective power supply control on the storage battery, thereby effectively preventing the risk of storage battery feed, avoiding repeated feed and power supply of the storage battery, and saving energy.
Further, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for supplementing power to a battery of the pure electric vehicle is implemented.
According to the computer-readable storage medium of the embodiment of the invention, when the computer program stored on the computer-readable storage medium and corresponding to the battery power supplement method of the pure electric vehicle is executed by the processor, the effective power supplement control on the battery can be realized, so that the battery power feeding risk can be effectively prevented, the repeated power feeding and power supplement of the battery can be avoided, and the energy is saved.
Further, the invention provides a pure electric vehicle which comprises the storage battery power supply system of the pure electric vehicle.
According to the pure electric vehicle, when the storage battery power supplementing system of the pure electric vehicle is applied to the storage battery power supplementing method of the pure electric vehicle, the storage battery can be effectively supplemented and controlled, so that the storage battery feeding risk can be effectively prevented, the storage battery can be prevented from being repeatedly fed and supplemented, and energy is saved.
In addition, other structures and functions of the pure electric vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail to reduce redundancy.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The method for supplementing electricity for the storage battery of the pure electric vehicle is characterized by comprising the storage battery, a standby battery and a relay, wherein the relay comprises a relay coil and a relay contact, the relay coil is connected between the positive pole of the storage battery and the positive pole of the standby battery, and the relay contact is connected between the positive pole of the storage battery and a vehicle-mounted terminal of the pure electric vehicle, and comprises the following steps:
when the pure electric vehicle is in a fortifying state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal is awakened;
the vehicle-mounted terminal acquires the voltage of the storage battery in real time;
when the voltage of the storage battery is smaller than a first preset voltage, the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle so as to supplement power to the storage battery through a DC/DC converter of the pure electric vehicle;
and when the voltage of the storage battery is greater than or equal to the first preset voltage, the standby battery is supplemented through a power management module in the vehicle-mounted terminal.
2. The battery power supplementing method of the pure electric vehicle according to claim 1, wherein the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle so as to supplement power to the battery through a DC/DC converter of the pure electric vehicle, and the method comprises the following steps:
the vehicle-mounted terminal sends a power supplementing request to a vehicle controller of the pure electric vehicle;
the vehicle controller controls a high-voltage power supply switch of the pure electric vehicle to be closed according to the power supplementing request so as to awaken a plurality of high-voltage electronic control units of the pure electric vehicle, wherein the plurality of high-voltage electronic control units comprise a battery management system and a DC/DC controller;
the vehicle controller sends the power supplementing request to the battery management system;
the battery management system controls the conduction of a loop where the DC/DC converter is located according to the power supplementing request;
the vehicle controller controls the DC/DC converter to work through the DC/DC controller so as to realize that the power battery of the pure electric vehicle supplements power for the storage battery.
3. The battery power supplementing method of the pure electric vehicle according to claim 2, wherein the method further comprises:
the DC/DC controller feeds back the electricity supplementing state of the storage battery to the vehicle controller;
after the vehicle controller judges that the power supply of the storage battery is successful according to the power supply state and the vehicle-mounted terminal judges that the relay contact is disconnected, the vehicle-mounted terminal sends a power supply closing request to the vehicle controller;
the vehicle controller controls the DC/DC converter to stop working through the DC/DC controller according to the power supplementing closing request so as to stop the power battery from supplementing power to the storage battery;
after the DC/DC converter stops working, the vehicle controller sends a high-voltage power-off command to the battery management system;
and the battery management system controls the circuit where the DC/DC converter is located to be disconnected according to the high-voltage power-down instruction.
4. The battery power supplementing method of the pure electric vehicle according to claim 3, wherein the method further comprises:
after the vehicle controller judges that the power supplement of the storage battery is unsuccessful according to the power supplement state, the vehicle controller sends the high-voltage power-off instruction to the battery management system;
the battery management system controls a loop where the DC/DC converter is located to be disconnected according to the high-voltage power-down instruction;
after the loop where the DC/DC converter is located is disconnected, the vehicle controller controls the high-voltage power supply switch to be disconnected and re-executes a compensation control process; and the number of the first and second groups,
and when the vehicle-mounted terminal determines that the relay contact is not disconnected, the vehicle controller continuously controls the DC/DC converter to work through the DC/DC controller.
5. The battery power supplementing method for the pure electric vehicle according to claim 1, wherein the supplementing the standby battery through a power management module in the vehicle-mounted terminal includes:
the vehicle-mounted terminal acquires the voltage of the standby battery in real time;
and when the voltage of the standby battery is smaller than a second preset voltage, controlling the power supply management module to supplement the power of the standby battery until the voltage of the standby battery is larger than or equal to the second preset voltage.
6. The battery power supplementing method of the pure electric vehicle according to claim 2, wherein the method further comprises:
after receiving the power supplementing request, the battery management system carries out self-checking on the self state;
when the battery management system has no fault through self-test, controlling a loop where the DC/DC converter is located to be conducted;
and when the battery management system is subjected to self-checking, the vehicle controller controls the high-voltage power supply switch to be switched off.
7. The battery power supplementing method of the pure electric vehicle according to claim 2, wherein the method further comprises:
after the vehicle controller controls the high-voltage power supply switch to be closed, whether a high-voltage system of the pure electric vehicle has a fault is judged;
when the high-voltage system has no fault, sending the power supplementing request to the battery management system;
and when the high-voltage system has a fault, controlling the high-voltage power supply switch to be switched off.
8. The battery power supplementing system of the pure electric automobile is characterized by comprising a storage battery and a standby battery, and comprises a relay, a vehicle-mounted terminal, a vehicle controller and a DC/DC converter, wherein,
the relay comprises a relay coil and a relay contact, the relay coil is connected between the positive electrode of the storage battery and the positive electrode of the standby battery, and the relay contact is connected between the positive electrode of the storage battery and the vehicle-mounted terminal; when the pure electric vehicle is in a fortifying state, the pure electric vehicle is in a low power consumption mode, and the relay contact is in a closed state due to the voltage difference between the storage battery and the standby battery, the vehicle-mounted terminal is awakened;
the vehicle-mounted terminal comprises a power management module, and is used for acquiring the voltage of the storage battery in real time, sending a power supplementing request to the vehicle controller when the voltage of the storage battery is smaller than a first preset voltage so as to supplement the power of the storage battery through the DC/DC converter, and supplementing the power of the standby battery through the power management module when the voltage of the storage battery is larger than or equal to the first preset voltage.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a battery recharging method for a pure electric vehicle according to any one of claims 1 to 7.
10. A pure electric vehicle, characterized by comprising the battery recharging system of the pure electric vehicle as claimed in claim 8.
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