CN111762060A - Charging control method, vehicle, control device, and computer-readable storage medium - Google Patents
Charging control method, vehicle, control device, and computer-readable storage medium Download PDFInfo
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- CN111762060A CN111762060A CN202010614888.3A CN202010614888A CN111762060A CN 111762060 A CN111762060 A CN 111762060A CN 202010614888 A CN202010614888 A CN 202010614888A CN 111762060 A CN111762060 A CN 111762060A
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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
- 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]
- B60L58/13—Maintaining the SoC within a determined range
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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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
- 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]
- B60L58/14—Preventing excessive discharging
-
- 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
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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
- 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
- B60L2240/549—Current
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- 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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention provides a charge control method, a vehicle, a control device and a computer-readable storage medium, wherein the charge control method comprises the following steps: when the whole electric vehicle is powered off, detecting the voltage of the second storage battery; determining whether the voltage is less than a first voltage; controlling the converter to turn on based on the voltage being less than the first voltage, so that the first battery charges the second battery; detecting the current of the first storage battery for charging the second storage battery; determining whether the current is less than a first current; based on the current being less than the first current, the converter is controlled to turn off such that the first battery stops charging the second battery. According to the invention, under the condition that the electric vehicle is not started for a long time, the second storage battery can continuously supplement electric quantity from the first storage battery, and the electric vehicle does not have the problem of feeding power by the second storage battery.
Description
Technical Field
The present invention relates to the field of electric vehicles, and in particular, to a charging control method, a vehicle, a control device, and a computer-readable storage medium.
Background
At present, a starting storage battery of a vehicle mainly has the main effects that the vehicle is electrified and started at the moment of starting the vehicle, power is supplied to an electric appliance when the vehicle is in a non-starting state, and partial electric appliances can continuously work after being electrified.
After the vehicle is started, the generator of the fuel vehicle is used as a power supply to supply power to the electric appliances of the whole vehicle, the electric vehicle controls the output of the DC/DC converter through the vehicle controller and is used as a power supply to supply power to the electric appliances of the electric vehicle, and the storage battery is used as the electric appliances to be charged, namely, after the vehicle is started, the storage battery is charged, and when the vehicle is not started, the storage battery is discharged.
When the vehicle is in a non-starting state, because part of electric devices work, static power consumption exists, electric energy in the storage battery is continuously consumed, when the vehicle is not used for a long time, the condition of feeding electricity can occur in the storage battery, and the next starting of the vehicle is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
To this end, a first object of the present invention is to provide a charge control method for an electric vehicle battery.
A second object of the present invention is to provide an electric vehicle.
A third object of the present invention is to provide a charge control device.
A fourth object of the present invention is to provide a computer-readable storage medium.
To achieve the first object of the present invention, an embodiment of the present invention provides a charge control method of an electric vehicle storage battery, including: when the whole electric vehicle is powered off, detecting the voltage of the second storage battery; determining whether the voltage is less than a first voltage; controlling the converter to be started based on the voltage being less than the first voltage, so that the first storage battery charges the second storage battery; detecting the current of the first storage battery for charging the second storage battery; determining whether the current is less than a first current; based on the current being less than the first current, the converter is controlled to turn off such that the first battery stops charging the second battery.
Under the condition that the electric vehicle is not started for a long time, the second storage battery can continuously supplement electric quantity from the first storage battery, theoretically, the electric vehicle cannot have the problem of feeding of the second storage battery, the fact that some electric appliances are disconnected to memorize electricity is avoided, and some modules can monitor the vehicle state and collect data in real time. The electric vehicle does not need strong current at the moment of starting, and the second storage battery can be supplemented by the electric quantity of the first storage battery, so that the capacity of the second storage battery can be reduced, and the whole vehicle cost and the whole vehicle weight of the electric vehicle are reduced to a great extent. The user does not need to worry about that the second storage battery is used for a long time and feeds electricity, and does not need to restart the second storage battery frequently, so that the user experience is greatly increased. The second storage battery cannot be over-discharged, and the service life of the second storage battery is greatly prolonged.
In addition, the technical solution provided by the above embodiment of the present invention may further have the following additional technical features:
in the above technical solution, before the detecting the voltage of the second battery, the method further includes: setting a voltage detection interval duration and setting a detection duration of voltage detection.
The voltage of the second storage battery is detected to be fluctuated, so that the detection time length of voltage detection is set, and the voltage of the second storage battery is detected within a period of time by setting the detection time length of voltage detection, so that a more accurate voltage detection result can be obtained.
In any one of the above technical solutions, detecting the voltage of the second battery includes: and detecting the voltage of the second storage battery according to the voltage detection interval duration and the voltage detection duration.
The voltage of the second storage battery is detected according to the voltage detection interval duration and the voltage detection duration, because the second storage battery continues to provide power for part of electric appliances after the electric vehicle 100 is powered off, the second storage battery is always in a discharging state, the voltage of the second storage battery can continuously become lower along with the discharging of the second storage battery, the voltage of the second storage battery is detected intermittently or periodically according to the voltage detection interval duration, the state that the second storage battery needs to be charged can be detected at the first time, and the second storage battery is charged in time.
In any of the above technical solutions, determining whether the voltage is less than the first voltage includes: and judging whether the voltage is continuously smaller than the first voltage or not within the detection duration of the voltage detection.
When the voltage of the second storage battery is detected, the detection time at each time is the set detection time, because the voltage of the second storage battery fluctuates, the condition that the second storage battery really needs to be charged can be effectively identified by setting the detection time, the error detection caused by the voltage fluctuation is prevented, and the voltage detection accuracy of the second storage battery is improved.
In any one of the above technical solutions, the detecting between currents of the first storage battery charging the second storage battery further includes: the detection duration of the current detection is set.
The first storage battery charges the second storage battery, after the second storage battery is full of charge, the current of the first storage battery for charging the second storage battery can be reduced, and whether the second storage battery is full of charge is further judged by judging the current of the first storage battery for charging the second storage battery, and the current of the first storage battery for charging the second storage battery can fluctuate, so that the detection time is set.
In any of the above technical solutions, determining whether the current is smaller than the first current includes: whether the current is continuously smaller than the first current is determined within a detection period of the current detection.
In a period of time, the charging current of the second storage battery is detected, and a more accurate current detection result can be obtained.
In any of the above technical solutions, the method for controlling charging of an electric vehicle battery further includes: when the second storage battery detects that the electric vehicle is electrified in a whole vehicle and/or accessories are electrified and/or the first storage battery is charged during charging, the converter is controlled to be turned off, so that the first storage battery stops charging the second storage battery.
In the charging process of the second storage battery, the converter is controlled to be closed when the electric vehicle is in an ACC gear (full vehicle power-ON) or an ON gear (accessory power-ON), and the electric vehicle immediately exits from the charging process and enters a normal power-ON process. In the charging process of the second storage battery, the electric vehicle is inserted into the charging gun, the charging pile is judged to be charged for the first storage battery through the gun inserting signal, the control converter is closed, the first storage battery stops charging the second storage battery, and the charging pile charges the first storage battery for the first storage battery, wherein the charging priority of the charging pile is higher than that of the first storage battery for the second storage battery.
To achieve the second object of the present invention, an embodiment of the present invention provides an electric vehicle including: an electric vehicle provided with a converter, a first battery, and a second battery; a charge control device, wherein the charge control device charges or stops charging of the first secondary battery to the second secondary battery by controlling the converter using the charge control method of the electric vehicle secondary battery according to any one of the embodiments of the invention.
The electric vehicle provided in the embodiment of the present invention implements the steps of the method for controlling charging of an electric vehicle storage battery according to any embodiment of the present invention, so that the method has all the advantages of the method for controlling charging of an electric vehicle storage battery according to any embodiment of the present invention, and details are not repeated herein.
To achieve the third object of the present invention, an embodiment of the present invention provides a charge control device including a memory storing a computer program; a processor executing a computer program; wherein the processor, when executing the computer program, implements the steps of the method of controlling charging of an electric vehicle battery according to any of the embodiments of the present invention.
The charging control device provided in the embodiment of the present invention implements the steps of the method for controlling charging of the electric vehicle storage battery according to any embodiment of the present invention, and thus has all the advantages of the method for controlling charging of the electric vehicle storage battery according to any embodiment of the present invention, and will not be described herein again.
To achieve the fourth object of the present invention, an embodiment of the present invention provides a computer-readable storage medium storing a computer program which, when executed, implements the steps of the method for controlling charging of an electric vehicle storage battery according to any of the embodiments of the present invention.
The computer-readable storage medium provided in the embodiments of the present invention implements the steps of the method for controlling charging of an electric vehicle storage battery according to any one of the embodiments of the present invention, so that the method has all the advantages of the method for controlling charging of an electric vehicle storage battery according to any one of the embodiments of the present invention, and therefore, the description thereof is omitted here.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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 first flowchart illustrating a method for controlling charging of a battery according to an embodiment of the present invention;
FIG. 2 is a flow chart of setting voltage detection interval duration and detection duration according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a process for detecting the voltage of the second battery according to an embodiment of the present invention;
FIG. 4 is a flow chart illustrating a process of determining whether a voltage is less than a first voltage according to an embodiment of the present invention;
FIG. 5 is a flow chart illustrating setting the detection duration of current detection according to an embodiment of the present invention;
FIG. 6 is a flow chart illustrating a process of determining whether the current is less than the first current according to an embodiment of the present invention;
fig. 7 is a second flowchart illustrating a method for controlling charging of a battery according to an embodiment of the present invention;
FIG. 8 is a first schematic structural diagram of an electric vehicle according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a charging control device according to an embodiment of the present invention;
fig. 10 is a third schematic flow chart of a method for controlling charging of a battery according to an embodiment of the present invention;
fig. 11 is a fourth flowchart illustrating a method for controlling charging of a battery according to an embodiment of the present invention;
fig. 12 is a second schematic structural diagram of an electric vehicle according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 12 is:
100: electric vehicle, 110: electric vehicle body, 120: charge control device, 122: memory, 124: processor, 130: converter, 140: first storage battery, 150: second battery, 160: remote monitoring terminal, 170: vehicle control unit, 180: combination meter, 190: all-in-one electric drive assembly system, 200: a battery management system.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A charge control method, an electric vehicle 100, a charge control device 120, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 12.
At present, a low-voltage storage battery of a vehicle mainly has the main effects that the vehicle is electrified and started at the moment of starting the vehicle, and power is supplied to a low-voltage electric appliance when the vehicle is not started, so that part of electric appliances can continuously work after being electrified.
After the vehicle is started, the generator of the fuel vehicle is used as a power supply to charge the low-voltage storage battery, and the DC/DC converter (direct current/direct current converter) of the electric vehicle can be used as a power supply to charge the low-voltage storage battery, namely, after the vehicle is started, the low-voltage storage battery is charged, and when the vehicle is not started, the low-voltage storage battery is discharged.
When the vehicle is in a non-starting state, because part of electric devices work, static power consumption can exist, electric energy in the low-voltage storage battery is continuously consumed, when the vehicle is not used for a long time, the condition of feeding can occur in the low-voltage storage battery, and the next starting of the vehicle is influenced.
According to the charging control method and system of the electric vehicle storage battery and the vehicle control unit in the related technology, for the fuel vehicle, after the vehicle is started, the starter charges the low-voltage storage battery of the electric vehicle, the electric quantity of the low-voltage storage battery is checked, and after the low-voltage storage battery is fully charged, the charging current of the low-voltage storage battery is cut off, so that the low-voltage storage battery is protected, and the service life of the low-voltage storage battery is prolonged.
This embodiment is mainly to electric vehicle, and mainly for the state after electric vehicle power-down, when the low pressure battery feed, power battery can electric vehicle low pressure battery's charge control, avoids the low pressure battery feed, for next time power-on keep sufficient electric quantity, avoids the low pressure battery to cross to put simultaneously, improves low pressure battery life.
Example 1:
as shown in fig. 1, the present embodiment provides a charge control method of an electric vehicle storage battery, including the steps of:
step S102, detecting the voltage of a second storage battery after the whole electric vehicle is powered off;
step S104, judging whether the voltage is smaller than a first voltage;
step S106, controlling the converter to be started based on the voltage smaller than the first voltage, so that the first storage battery charges the second storage battery;
step S108, detecting the current of the first storage battery for charging the second storage battery;
step S110, judging whether the current is smaller than a first current;
and step S112, controlling the converter to be closed based on the fact that the current is smaller than the first current, so that the first storage battery stops charging the second storage battery.
Specifically, first battery 140 is a power battery of electric vehicle 100, the power battery provides a power source for electric vehicle 100, and second battery 150 is a low-voltage battery of electric vehicle 100, the low-voltage battery is suitable for powering electric vehicle 100 at the moment of starting electric vehicle 100, and supplying power to low-voltage electric devices when electric vehicle 100 is not started, so as to ensure that some electric devices can continue to operate after being powered down.
As shown in fig. 12, the electric vehicle 100 may further include: a remote monitoring terminal 160, a vehicle control unit 170, a cluster 180, an all-in-one electric drive assembly system 190, and/or a battery management system 200.
The voltage of second battery 150 may be detected by a remote monitoring terminal 160(Telematics BOX, TBOX) or a Vehicle control unit 170(VCU) or a combination meter 180 or an all-in-one electric drive assembly 190 in electric Vehicle 100.
The converter 130 includes a DC/DC converter.
The value range of the first voltage is as follows: 24V to 26.5V.
The value range of the first current is as follows: 0.5A to 5A.
Under the condition that the electric vehicle 100 is not started for a long time, the second storage battery 150 can continuously supplement electric quantity from the first storage battery 140, theoretically, the electric vehicle 100 cannot have the problem of power feeding of the second storage battery 150, the phenomenon that some electric appliances are disconnected to memorize electricity is avoided, and some modules can monitor the vehicle state and collect data in real time.
Because the electric vehicle does not need strong current at the moment of starting, and the second storage battery 150 can be supplemented with the electric quantity of the first storage battery 140, the capacity of the second storage battery 150 can be reduced, and the whole vehicle cost and the whole vehicle weight of the electric vehicle 100 are reduced to a great extent.
By applying the embodiment, the user does not need to worry about the feeding of the second storage battery 150 without using for a long time, and the second storage battery 150 does not need to be restarted frequently, so that the user experience is greatly increased. Moreover, the second storage battery 150 does not have the problem of over-discharge, and the service life of the second storage battery 150 is greatly prolonged.
Example 2:
as shown in fig. 2, in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:
before the voltage of the second storage battery is detected, the method further comprises the following steps:
step S202, setting voltage detection interval duration;
step S204, setting the detection time length of voltage detection.
The voltage of the second storage battery 150 is intermittently or periodically detected by setting the voltage detection interval duration, and the detection interval duration can be determined according to the specific model and performance of the second storage battery 150 and the speed of electric energy consumption of the electric vehicle 100 after power failure. The detection interval duration value range is as follows: 0.5h to 24h, for example, may be set to 30 minutes.
When the detection interval is long, the remote monitoring terminal 160, or the vehicle control unit 170, or the combination meter 180, or the all-in-one electric drive assembly system 190 is awakened to detect the second storage battery 150, and after the detection is finished or the charging technology is performed, the remote monitoring terminal 160, or the vehicle control unit 170, or the combination meter 180, or the all-in-one electric drive assembly system 190 enters the sleep mode.
Since the detected voltage of the second battery 150 fluctuates, the detection time period of the voltage detection is set, and by setting the detection time period of the voltage detection, the voltage of the second battery 150 is detected within a period of time, and a more accurate voltage detection result can be obtained. The detection duration of the voltage detection is determined according to the specific model and performance of the second storage battery 150, and the value range of the detection duration of the voltage detection is as follows: 3S to 15S, for example, may be set to 5 seconds.
Example 3:
as shown in fig. 3, in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:
detecting a voltage of a second battery, comprising:
step S302, detecting the voltage of the second storage battery according to the voltage detection interval duration and the voltage detection duration.
The voltage of the second storage battery 150 is detected according to the voltage detection interval duration and the voltage detection duration, because the second storage battery 150 continues to provide power for part of the electric appliances after the electric vehicle 100 is powered off, the second storage battery 150 is always in a discharging state, the voltage of the second storage battery 150 can be continuously lowered as the second storage battery 150 is discharged, the voltage of the second storage battery 150 is detected intermittently or periodically according to the voltage detection interval duration, the state that the second storage battery 150 needs to be charged can be detected at the first time, and charging is performed in time.
Example 4:
as shown in fig. 4, in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:
determining whether the voltage is less than a first voltage, comprising:
step S402, in the detection duration of the voltage detection, whether the voltage is continuously smaller than the first voltage is judged.
When the voltage of the second storage battery 150 is detected, the detection time at each time is the set detection time, because the voltage of the second storage battery 150 fluctuates, the condition of really needing charging can be effectively identified by setting the detection time, the error detection caused by the voltage fluctuation is prevented, and the voltage detection accuracy of the second storage battery 150 is improved.
Example 5:
as shown in fig. 5, in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:
the method for detecting the current of the first storage battery for charging the second storage battery further comprises the following steps:
step S502, a detection time period of the current detection is set.
The first storage battery 140 charges the second storage battery 150, after the second storage battery 150 is fully charged, the current charged by the first storage battery 140 to the second storage battery 150 is reduced, and whether the second storage battery 150 is fully charged is further judged by judging the current charged by the first storage battery 140 to the second storage battery 150, because the current charged by the first storage battery 140 to the second storage battery 150 fluctuates, a detection time length is set, the detection time length of current detection is determined according to the specific models and performances of the first storage battery 140, the second storage battery 150 and the DC/DC converter, and the value range of the detection time length of current detection is as follows: 3S to 15S, for example, may be set to 5 seconds.
Example 6:
as shown in fig. 6, in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:
determining whether the current is less than a first current, comprising:
step S602, during the detection duration of the current detection, determines whether the current is continuously smaller than the first current.
The charging current of the second battery 150 is detected for a certain period of time, and a more accurate current detection result can be obtained.
When the charging current of the first storage battery 140 to the second storage battery 150 is detected, whether the detection current is continuously smaller than the first current or not is detected within the detection time period of current detection, because the charging current of the second storage battery 150 fluctuates, the condition that the second storage battery 150 is fully charged can be effectively identified by setting the detection time period, the false detection caused by the current fluctuation is prevented, and the accuracy rate of current detection of the second storage battery 150 is improved.
Example 7:
as shown in fig. 7, in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:
the charge control method of the electric vehicle storage battery further includes:
and S702, when the second storage battery detects that the electric vehicle is electrified in a whole vehicle, and/or accessories are electrified, and/or the first storage battery is charged in the charging process, controlling the converter to be closed so that the first storage battery stops charging the second storage battery.
During charging of the second battery 150, the electric vehicle 100 is powered ON in an ACC gear (full vehicle power ON) or an ON gear (accessory power ON), the control converter 130 is turned off, and the electric vehicle 100 immediately exits the charging process and enters a normal power ON process.
In the charging process of the second storage battery 150, the electric vehicle 100 is inserted into a charging gun, the electric vehicle 100 determines that the charging pile charges the first storage battery 140 through the gun insertion signal, the control converter 130 is turned off, the first storage battery 140 stops charging the second storage battery 150, and the charging pile charges the first storage battery 140 with a higher priority than the first storage battery 140 charges the second storage battery 150.
Example 8:
as shown in fig. 8, the present embodiment provides an electric vehicle 100 including: an electric vehicle body 110 and a charge control device 120, the electric vehicle body 110 being provided with a converter 130, a first battery 140, and a second battery 150; in the charging control device 120, the converter 130 is controlled to charge the first storage battery 140 to the second storage battery 150 or stop charging, by using the charging control method of the electric vehicle storage battery according to any of the embodiments of the present invention.
Example 9:
as shown in fig. 9, the present embodiment provides a charge control device 120 including: a memory 122 and a processor 124, the memory 122 storing a computer program, the processor 124 executing the computer program, wherein the processor 124, when executing the computer program, implements the steps of the method for controlling charging of an electric vehicle battery according to any of the embodiments of the present invention.
Example 10:
the present embodiments provide a computer-readable storage medium, comprising: the computer-readable storage medium stores a computer program that, when executed, implements the steps of a method of controlling charging of an electric vehicle storage battery according to any one of the embodiments of the invention.
The specific embodiment is as follows:
the embodiment provides a charge control method of an electric vehicle storage battery.
When the electric vehicle 100 is in an off state (power off), the second battery 150 (low-voltage battery, start-up battery) needs to provide power for some of the electric appliances, and when the current of the second battery 150 is insufficient, it is considered to convert the electric quantity in the first battery 140 (power battery) of the electric vehicle 100 to the second battery 150 to intelligently charge the second battery 150.
Compared with a fuel vehicle, the intelligent charging technology has natural advantages on the electric vehicle 100, the charging control of the second storage battery 150 of the electric vehicle 100 can be realized without starting the electric vehicle 100, a set of control strategy is implemented on the whole vehicle, the charging control device 120 monitors the voltage of the second storage battery 150 in real time (the voltage of the second storage battery 150 is in a certain proportion to the electric surplus), when the voltage of the second storage battery 150 is low and has a certain value (the electric quantity is insufficient), the whole vehicle controller 170 is awakened, the high-voltage system is controlled to output direct-current voltage, the second storage battery 150 of the electric vehicle 100 is charged, the charging signal is cut off after the charging is fully charged, the whole vehicle enters a low-power consumption state, and the electric quantity of the whole vehicle is equivalent to transferring the electric quantity of.
The charging control device 120 may include a remote monitoring terminal 160(Telematics BOX, chinese), a vehicle control unit 170(VCU), a combination meter 180, or an all-in-one electric drive assembly 190.
Specifically, as shown in fig. 10, the charging control method for the electric vehicle battery specifically includes:
step S702, detecting a second storage battery voltage by an electric vehicle off gear and TBOX;
when the electric vehicle 100 is in the off-range, the remote monitoring terminal 160 detects the supply voltage of the second battery 150 of 24V once every 30min from the time when the ACC (key gate switch) is powered off, and the detection period lasts for 5 s.
Step S704, detecting whether the voltage is less than 26.2V;
if the voltage of the second storage battery 150 is detected to be less than 26.2V for 5S, the step S706 is carried out, otherwise, no response is carried out.
Step S706, TBOX outputs A + voltage (on gear) signal to VCU, and sends charging message;
the remote monitoring terminal 160 exits the sleep state, continuously outputs a high level, wakes up the vehicle control unit 170(VCU) through the pull-in relay, and simultaneously sends out charging message information, wherein the message period is 200ms, and informs the vehicle control unit 170 and the second storage battery 150 to feed power.
Step 708, the VCU is awakened, identifies the charging signal, and controls the DC/DC converter to output voltage;
the vehicle control unit 170 confirms that the second storage Battery 150 is insufficient, sends a command to the Battery Management System 200(BMS, Battery Management System), the Battery Management System 200 attracts the main load, after the vehicle control unit 170 obtains the main load attraction feedback, sends a DCDC enabling command (the main positive and auxiliary high-voltage relays do not attract) to the DC/DC converter, the DC/DC converter starts to work, the first storage Battery 140 supplements the charge for the second storage Battery 150, and at the moment, the meter interface displays a prompt of a power supplement icon of the second storage Battery 150.
Step S710, when the current of the DC/DC converter is detected to be less than 3A, TBOX disconnects A + output voltage, and meanwhile, the charging message is stopped being sent.
And monitoring the current of the DC/DC converter in real time, when the four-in-one electric drive assembly system detects that the output current of the DC/DC converter is continuously less than 5S and less than 3A, judging that the second storage battery 150 is fully charged, stopping outputting a wake-up high level signal by the remote monitoring terminal 160 at the moment, stopping sending the charging message information, and immediately exiting the power supplementing process by the vehicle controller 170. The instrument screen, the VCU and the like enter a sleep state, the remote monitoring terminal 160 enters a low power consumption state, and the cyclic detection of the power shortage of the second storage battery 150 is continuously started after 30 min.
In step S712, the VCU turns off the on-gear power, and the second battery is fully charged.
In the charging control process of the second storage battery 150 of the electric vehicle 100, the electric vehicle 100 is plugged into a charging gun, the battery management system 200 determines that the charging pile charges the first storage battery 140 according to the gun plugging signal, and the remote monitoring terminal 160 stops outputting the wake-up voltage and the charging message, that is, the charging pile charges the first storage battery 140 with a priority higher than that of the first storage battery 140 and charges the second storage battery 150.
In the charging control process of the second storage battery 150, the electric vehicle 100 is powered on in the ACC gear, that is, the whole vehicle is powered on (ACC gear) or the accessory is powered on (on gear), the remote monitoring terminal 160 stops outputting the wake-up signal after delaying for 1S, and at the same time, the message information is embodied, and the vehicle controller 170 immediately exits the charging process and enters a normal power-on process, as shown in fig. 11, specifically includes:
step S802, the second storage battery is being charged, and a driver is powered on;
step S804, the driver gets to an ACC gear or an on gear in the power-on process;
step S806, when the TBOX detects the ACC power, the TBOX disconnects the A + voltage signal and stops sending the charging message;
step S808, the VCU judges that the charging message is not received and is in a non-charging mode;
in step S810, the VCU is powered on according to the original power-on procedure.
In summary, the embodiment of the invention has the following beneficial effects:
1. under the condition that the electric vehicle 100 is not started for a long time, the second storage battery 150 can continuously supplement electric quantity from the first storage battery 140, theoretically, the vehicle cannot have the problem of power feeding of the second storage battery 150, the phenomenon that some electric appliances are disconnected to memorize electricity is avoided, and some modules can monitor the vehicle state and collect data in real time.
2. Because the electric vehicle 100 does not need strong current at the moment of starting, the second storage battery 150 can be supplemented with the electric quantity of the first storage battery 140, so that the overall capacity of the first storage battery 140 and the second storage battery 150 can be reduced, and the overall vehicle cost and the overall vehicle weight are reduced to a great extent.
3. The user does not need to worry about the long-term power feeding of the second storage battery 150, and does not need to restart the second storage battery 150 frequently, so that the user experience is greatly increased.
4. The second storage battery 150 does not have the problem of over-discharge, and the service life of the second storage battery 150 is greatly prolonged.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. 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 description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A charge control method for an electric vehicle battery, characterized by comprising:
when the whole electric vehicle is powered off, detecting the voltage of the second storage battery;
determining whether the voltage is less than a first voltage;
controlling a converter to turn on based on the voltage being less than the first voltage, so that a first battery charges the second battery;
detecting a current of the first storage battery charging the second storage battery;
determining whether the current is less than a first current;
controlling the converter to turn off based on the current being less than the first current, such that the first battery stops charging the second battery.
2. The charge control method of an electric vehicle battery according to claim 1, characterized by further comprising, before performing the detection of the voltage of the second battery:
setting a voltage detection interval duration;
the detection duration of the voltage detection is set.
3. The charge control method of an electric vehicle battery according to claim 2, wherein the detecting a voltage of the second battery includes:
and detecting the voltage of the second storage battery according to the voltage detection interval duration and the voltage detection duration.
4. The electric vehicle battery charge control method according to claim 3, wherein the determining whether the voltage is less than a first voltage includes:
and determining whether the voltage is continuously smaller than the first voltage within the detection duration of the voltage detection.
5. The charge control method of an electric vehicle battery according to claim 1, characterized in that the detecting between currents at which the first battery charges the second battery is performed, further comprises:
the detection duration of the current detection is set.
6. The electric vehicle battery charge control method according to claim 5, wherein the determining whether the current is less than a first current includes:
determining whether the current is continuously smaller than the first current for a detection period of the current detection.
7. The charge control method of an electric vehicle battery according to claim 1, characterized by further comprising:
when the second storage battery is charged, the whole vehicle power-on of the electric vehicle and/or the accessory power-on are detected, and/or the first storage battery is charged, the converter is controlled to be turned off, so that the first storage battery stops charging the second storage battery.
8. An electric vehicle (100), characterized by comprising:
an electric vehicle body (110) provided with a converter (130), a first battery (140), and a second battery (150);
a charging control device (120);
wherein the charge control device (120) employs the charge control method of an electric vehicle storage battery according to any one of claims 1 to 7, by controlling a converter (130), so that the first storage battery (140) charges or stops charging to the second storage battery (150).
9. A charge control device (120), comprising:
a memory (122) storing a computer program;
a processor (124) executing the computer program;
wherein the processor (124), when executing the computer program, implements the steps of the method of controlling charging of an electric vehicle battery as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, comprising:
the computer-readable storage medium stores a computer program that, when executed, implements the steps of the method of controlling charging of an electric vehicle storage battery according to any one of claims 1 to 7.
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