CN112721680B - Current control method and device, vehicle and storage medium - Google Patents
Current control method and device, vehicle and storage medium Download PDFInfo
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- CN112721680B CN112721680B CN202011563459.4A CN202011563459A CN112721680B CN 112721680 B CN112721680 B CN 112721680B CN 202011563459 A CN202011563459 A CN 202011563459A CN 112721680 B CN112721680 B CN 112721680B
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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
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- 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 discloses a current control method, a current control device, a vehicle and a storage medium, wherein the method comprises the following steps: according to the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current; according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the demand current of the power battery, the next charging current and the preset difference current, if the next output current meets the current safety regulation condition, the next output current is safely regulated to obtain a new next output current; and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery. According to the embodiment of the invention, the current output current of the vehicle-mounted charger is controlled in real time, so that the alternating current charging time is shortened.
Description
Technical Field
The embodiment of the invention relates to a computer control technology, in particular to a current control method, a current control device, a vehicle and a storage medium.
Background
Along with the continuous increase of the capacity of a power battery of an electric vehicle, the vehicle-mounted charger power of the electric vehicle is increased. During charging, in order to ensure the use safety of the vehicle-mounted charger and the charging cable, it is required to ensure that the input current of the vehicle-mounted charger does not exceed the smaller value of the maximum output current of the power supply equipment and the rated current of the charging cable. The existing vehicle-mounted charger takes the smaller value of the self maximum output current and the power battery demand current as the target output current. However, the vehicle-mounted high-voltage component consumes electric energy in the alternating-current charging process, so that the actual charging current of the power battery becomes small. When the output current of the vehicle-mounted charger does not reach the maximum capacity of the vehicle-mounted charger, the required current of the power battery is used as the target output current, and the actual charging current of the power battery is reduced due to the electric energy consumed by the vehicle-mounted high-voltage component, so that the alternating current charging time is prolonged.
Disclosure of Invention
The invention provides a current control method, a current control device, a vehicle and a storage medium, which are used for adjusting the current output current of a vehicle-mounted charger according to the maximum output current of the vehicle-mounted charger, the demand current of a power battery and the actual charging current flow, so that the current output current of the vehicle-mounted charger is controlled in real time, the utilization rate of the output power of the vehicle-mounted charger in the alternating current charging process is improved, the alternating current charging time is shortened, and the user experience is improved.
In a first aspect, an embodiment of the present invention provides a current control method, which is applied to a vehicle-mounted charger to charge a power battery, and includes:
according to the demand current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current;
according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and the preset difference current, determining that the next output current meets the current safety adjustment condition, and performing safety adjustment on the next output current to obtain a new next output current;
and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery.
In a second aspect, an embodiment of the present invention further provides a current control apparatus, including:
the primary regulation module is used for carrying out primary regulation on the current output current according to the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current;
the safety adjustment module is used for determining that the next output current meets a current safety adjustment condition according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and a preset difference current, and then safely adjusting the next output current to obtain a new next output current; and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery.
In a third aspect, an embodiment of the present invention further provides a vehicle, including: the system comprises a vehicle-mounted charger, a power battery, one or more processors and a storage device;
the vehicle-mounted charger is used for charging the power battery;
the power battery is used for storing electric energy to provide power for the vehicle;
a storage device to store one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the current control method.
In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions for performing any of the described current control methods when executed by a computer processor.
According to the invention, the current output current is initially adjusted according to the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current; according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and the preset difference current, determining that the next output current meets the current safety adjustment condition, and performing safety adjustment on the next output current to obtain a new next output current; and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery. When the output current of solving on-vehicle machine that charges does not reach self maximum capacity, regard power battery's demand electric current as target output current, on-vehicle high-voltage component consumes the electric energy and can make power battery's actual charging current diminish, and then lead to the extension problem of alternating current charging time, with the realization according to on-vehicle machine's maximum output current, power battery's demand electric current and actual charging current flow adjust on-vehicle machine's current output current, reach the current output current of real time control on-vehicle machine that charges, with the utilization ratio of the on-vehicle machine output power of improvement alternating current charging in-process, shorten alternating current charging time, promote user experience.
Drawings
Fig. 1 is a schematic flow chart of a current control method according to a first embodiment of the invention;
FIG. 2 is a flow chart illustrating a current control method according to a second embodiment of the present invention;
FIG. 2a is a schematic diagram of a current control method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a current control apparatus according to a third embodiment of the present invention;
fig. 4 is a structural diagram of a vehicle in a fourth embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Example one
Fig. 1 is a flowchart of a current control method according to an embodiment of the present invention, where the method is applicable to a situation where a vehicle-mounted charger charges a power battery, and the method may be executed by a current control device, where the current control device may be implemented by software and/or hardware, and may specifically be inherited in an electronic device having storage and computation capabilities to perform battery charging.
As shown in fig. 1, the current control method provided in this embodiment specifically includes the following steps:
step S110, according to the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current;
in the embodiment of the invention, the required current of the power battery is the charging current required in the charging process of the power battery, is equivalent to the rated charging current of the power battery, and is the maximum allowable current capable of maintaining normal operation when the power battery is charged. The current output current of the vehicle-mounted charger is the current output by the vehicle-mounted charger to charge the power motor at the current moment. The current output voltage of the vehicle-mounted charger is the voltage corresponding to the current when the vehicle-mounted charger outputs the current to charge the power battery at the current moment. The next output current is the output current of the vehicle-mounted charger at the next moment.
In the embodiment of the invention, the vehicle-mounted charger acquires the required current of the power battery and the current charging current of the power battery from the CAN bus, and then determines the maximum output current of the vehicle-mounted charger according to the current output current and the current output voltage of the vehicle-mounted charger. And determining the next output current after initial adjustment according to the required current of the power battery and the maximum output current of the vehicle-mounted charger.
Further, the step of primarily adjusting the current output current according to the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current includes: determining the current maximum output current of the vehicle-mounted charger according to the current maximum output power and the current output voltage of the vehicle-mounted charger; when the current maximum output current is larger than the required current, setting the required current as the next output current; and when the current maximum output current is smaller than the required current, taking the current maximum output current as the next output current.
In the embodiment of the invention, the current maximum output power of the vehicle-mounted charger is the output power of the rated output power of the vehicle-mounted charger except the output power which is necessarily consumed by the vehicle-mounted charger. The current maximum output current of the vehicle-mounted charger is the ratio of the current maximum output power of the vehicle-mounted motor to the current output voltage of the vehicle-mounted charger at the current moment.
In the embodiment of the invention, in order to ensure that the input current of the vehicle-mounted charger does not exceed the smaller value of the maximum output current of the power supply equipment and the rated current of the charging cable, the smaller value of the maximum output current of the vehicle-mounted charger and the required current of the power battery needs to be used as the next output current of the vehicle-mounted charger.
Step S120, according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the demand current of the power battery, the next charging current and the preset difference current, determining that the next output current meets the current safety adjustment condition, and then safely adjusting the next output current to obtain a new next output current;
in the embodiment of the invention, the next output voltage is the output voltage of the vehicle-mounted charger at the next moment corresponding to the current moment; the maximum output current corresponding to the next output voltage is the output current corresponding to the next maximum output power of the vehicle-mounted charger and the next output voltage of the vehicle-mounted charger; the next maximum output power of the vehicle-mounted charger is the output power of the rated output power of the vehicle-mounted charger at the next moment of the vehicle-mounted motor except the output power which is necessarily consumed by the vehicle-mounted charger. The next charging current is the actual charging current of the power battery at the next moment; the preset differential current is a fixed differential current between the required current of the power battery and the next charging current of the power battery, and is used for determining whether the difference current between the next charging current of the power battery and the required current of the power battery has an adjustable space.
In the embodiment of the invention, when the next output current meets the current safety regulation condition, the difference between the next charging current of the power battery and the requirement of the power battery is larger, and the safety regulation can be carried out on the premise of ensuring the charging safety. The next output current of the vehicle-mounted charger is safely adjusted, and the next charging current of the power battery is actually safely adjusted.
In the embodiment of the invention, whether the next output current of the vehicle-mounted charger can be continuously adjusted safely is determined according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage and the next output current; determining whether the next charging current of the power battery can be continuously safely adjusted according to the required current of the power battery and the next charging current of the power battery; and if the next output current of the vehicle-mounted charger and the next charging current of the power battery can be continuously and safely regulated, safely regulating the next output current of the vehicle-mounted charger.
Further, if it is determined that the next output current meets the current safety adjustment condition according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, and the required current, the next charging current, and the preset difference current of the power battery, the next output current is safely adjusted to obtain a new next output current, including:
and if the required current is larger than the sum of the next charging current and the preset difference current and the next output current is smaller than the current maximum output current, determining the new next output current according to the current maximum output current and the sum of the required current and the compensation current.
In the embodiment of the invention, the compensation current is the difference current between the demand current of the power battery and the next charging current of the power battery, is used for displaying the actual difference between the demand current of the power battery and the next charging current of the power battery, and is used for safely adjusting the next output current of the vehicle-mounted charger according to the actual value of the compensation current. The new next output current is the output current of the vehicle-mounted charger at the next moment after the next output current of the vehicle-mounted charger is safely adjusted.
In the embodiment of the invention, when the required current of the power battery is greater than the sum of the next charging current of the power battery and the preset difference current, the next charging current of the power battery meets the safety regulation condition, and a safety regulation space exists between the next charging current of the power battery and the required current of the power battery. When the next output current of the vehicle-mounted charger is smaller than the current maximum output current of the vehicle-mounted charger, the next output current of the vehicle-mounted charger meets the safety adjustment condition, and a safety adjustment space exists between the next output current of the vehicle-mounted charger and the current maximum output current of the vehicle-mounted charger. When the next charging current of the power battery and the next output current of the vehicle-mounted charger meet the safety adjustment condition at the same time, the next charging current of the power battery can be adjusted correspondingly by safely adjusting the next output current of the vehicle-mounted charger.
Further, the safely adjusting the next output current to obtain a new next output current includes:
if the maximum output current corresponding to the next output voltage is smaller than the sum of the demand current and the compensation current, taking the maximum output current corresponding to the next output voltage as the new next output current;
and if the maximum output current corresponding to the next output voltage is larger than the sum of the demand current and the compensation current, the sum of the demand current and the compensation current is the new next output current.
In the embodiment of the invention, the next output current of the vehicle-mounted charger meets the safety adjustment condition and is safely adjusted. And determining the new next output current according to the maximum output current corresponding to the next output voltage of the vehicle-mounted charger and the sum of the demand current of the power battery and the compensation current of the power battery. And safely adjusting the next output current of the vehicle-mounted charger to ensure the safety of an output circuit of the vehicle-mounted charger and a charging circuit of the power battery, and selecting the smaller value of the maximum output current corresponding to the next output voltage of the vehicle-mounted charger and the sum of the demand current of the power battery and the compensation current of the power battery as the new next output current of the vehicle-mounted charger.
And step 130, if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery.
In the embodiment of the invention, after the output current of the vehicle-mounted charger is initially adjusted, the output current of the vehicle-mounted charger is updated to be the next output current, so that the actual charging current of the power battery is updated to be the next charging current; after the next output current of the vehicle-mounted charger is adjusted safely, the output current of the vehicle-mounted charger is updated to be the new next output current, and the actual charging current of the power battery is updated to be the new next charging current; and continuously judging whether the new next output current of the vehicle-mounted charger meets the safety adjustment condition, if so, continuously carrying out safety adjustment on the new next output current of the vehicle-mounted charger. And if the safety regulation condition is not met, the new next output current of the vehicle-mounted charger does not have a safety regulation space, the new next output current of the vehicle-mounted charger is maintained, and the charging current is kept as the new next charging current to charge the power battery.
Further, if the new next output current meets a current safety adjustment condition, continuing to perform safety adjustment on the new next output current includes:
and after the new next output current is safely adjusted, determining that the new next output current meets the current safety adjustment condition according to the new next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the new next output voltage, the required current of the power battery, the new next charging current and the preset difference current, and then safely adjusting the new next output current to obtain the latest next output current.
In the embodiment of the invention, the new next output voltage is the next output voltage corresponding to the new next output current after the next output current of the vehicle-mounted charger is safely adjusted; the maximum output current corresponding to the new next output voltage is the output current corresponding to the new next output voltage of the vehicle-mounted charger and the new next maximum output power after the next output current of the vehicle-mounted charger is safely adjusted; the new next maximum output power of the vehicle-mounted charger is the output power of the rated output power of the vehicle-mounted charger at the next moment after the next output current of the vehicle-mounted motor is safely adjusted, except for the output power which is necessarily consumed by the vehicle-mounted charger. And the new next charging current is the actual charging current of the power battery at the next moment after the next output current of the vehicle-mounted charger is safely adjusted.
In the embodiment of the invention, when the new next output current meets the current safety regulation condition, the difference between the new next charging current of the power battery and the requirement of the power battery is larger, and the safety regulation can be carried out on the premise of ensuring the charging safety. The safety regulation of the new next output current of the vehicle-mounted charger is substantially the safety regulation of the new next charging current of the power battery.
In the embodiment of the invention, whether the new next output current of the vehicle-mounted charger can be continuously adjusted safely is determined according to the new next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the new next output voltage and the new next output current; determining whether the new next charging current of the power battery can be continuously safely adjusted according to the required current of the power battery and the new next charging current of the power battery; and if the new next output current of the vehicle-mounted charger and the new next charging current of the power battery can be continuously and safely regulated, the new next output current of the vehicle-mounted charger is safely regulated.
According to the embodiment of the invention, the current output current is initially adjusted according to the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current; according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and the preset difference current, determining that the next output current meets the current safety adjustment condition, and performing safety adjustment on the next output current to obtain a new next output current; and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery. When the output current of solving on-vehicle machine that charges does not reach self maximum capacity, regard power battery's demand electric current as target output current, on-vehicle high-voltage component consumes the electric energy and can make power battery's actual charging current diminish, and then lead to the extension problem of alternating current charging time, with the realization according to on-vehicle machine's maximum output current, power battery's demand electric current and actual charging current flow adjust on-vehicle machine's current output current, reach the current output current of real time control on-vehicle machine that charges, with the utilization ratio of the on-vehicle machine output power of improvement alternating current charging in-process, shorten alternating current charging time, promote user experience.
Example two
Fig. 2 is a flowchart of a current control method according to a second embodiment of the present invention. The technical scheme of the embodiment is further refined on the basis of the technical scheme, and specifically mainly comprises the following steps:
step S210, according to the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current;
step S220, if the required current is smaller than the sum of the next charging current and a preset difference current or the next output current is larger than the maximum output current corresponding to the next output voltage, when the required current is smaller than the next charging current, the required current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger are refreshed again, the current output current is initially adjusted, and the refreshed next output current is obtained;
in the embodiment of the invention, the required current of the power battery is less than the sum of the next charging current of the power battery and the preset difference current, and the next charging current of the power battery does not meet the safety regulation condition. And refreshing the current data of the vehicle-mounted charger and the power battery, wherein the refreshed next output current is the output current which is obtained after the vehicle-mounted charger refreshes again to obtain the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger are adjusted initially. And determining the maximum output current corresponding to the current output voltage of the vehicle-mounted charger according to the refreshed current output voltage of the vehicle-mounted charger and the current maximum output power of the vehicle-mounted charger. And primarily adjusting the current output current of the vehicle-mounted charger according to the maximum output current corresponding to the current output voltage of the vehicle-mounted charger after refreshing and the demand current of the power battery after refreshing to obtain the next output current after refreshing.
Step S230, if the refreshed next output current does not satisfy the safety adjustment condition, when the required current is smaller than the refreshed next charging current, continuing to refresh the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, and primarily adjusting the current output current until the vehicle-mounted charger finishes charging the power battery.
In the embodiment of the invention, the next output current of the refreshed vehicle-mounted charger still does not meet the safety adjustment condition, when the required current of the power battery is smaller than the refreshed next charging current, the next output current of the vehicle-mounted charger corresponds to the next charging current of the power battery and is within the safety charging range, the required current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger are continuously refreshed, and the current output current of the vehicle-mounted charger after secondary refreshing is primarily adjusted, so that the actual charging current of the power battery is dynamically adjusted in real time according to the real-time data of the power battery and the vehicle-mounted charger by adjusting the output current of the vehicle-mounted charger.
Further, after the safe adjustment is performed on the new next output current to obtain the latest next output current, the method further includes:
if the new next output current does not meet the safety adjustment condition, determining that the new next output current meets the regulation and reduction condition according to the required current of the power battery and the new next charging current, and regulating and reducing the new next output current to obtain the regulated and reduced output current; and if the regulating and reducing output current meets the regulating and reducing condition, continuing regulating and reducing the regulating and reducing output current.
In the embodiment of the invention, the output current is regulated and reduced to be the output current of the vehicle-mounted charger. The required current of the power battery is smaller than the new next charging current of the power battery, and the charging circuit is in an unsafe state and needs to be adjusted and reduced corresponding to the new next charging current of the power battery. The vehicle-mounted charger adjusts and reduces the new next charging current of the power battery by adjusting and reducing the new next output current corresponding to the vehicle-mounted charger, and the output current after the vehicle-mounted charger is adjusted and reduced, namely the adjusted and reduced output current, is obtained. And continuously carrying out regulation and reduction condition judgment on the regulation and reduction output current of the vehicle-mounted charger, and if the regulation and reduction output current of the vehicle-mounted charger continuously meets the regulation and reduction condition, continuously regulating and reducing the regulation and reduction output current of the vehicle-mounted charger.
The charging process of the power battery can be realized in various ways, specifically:
as shown in fig. 2a, an On-board Charger (OBC) obtains an input current limit value through a power supply device with a Circuit Protector (CP) and a Cable (CC) signal detection
Namely the maximum input current of the vehicle-mounted charger. A Battery Management System (BMS) for providing a required voltage U to the Battery BMS A required current I BMS And a charging current I B The voltage is sent to a CAN bus, and the vehicle-mounted charger receives the required voltage U of the power battery sent by the CAN bus BMS Required current I BMS And a charging current I B . Required voltage U of power battery received by vehicle-mounted charger BMS A required current I BMS And a charging current I B Then, according to the current output voltage U of the vehicle-mounted charger o Determining the current maximum (maximum) or (maximum) of the vehicle-mounted charger together with the current maximum output power of the vehicle-mounted charger>
According to the current maximum output current of the vehicle-mounted charger and the required current value of the power battery, the smaller value of the current maximum output current and the required current value of the power battery is taken as the next output current of the vehicle-mounted charger, namely the control target current I of the primary adjustment of the output current of the vehicle-mounted charger C1 . And when the required current of the power battery is greater than the sum of the next charging current of the power battery and the preset difference current and the next output current of the vehicle-mounted charger is less than the next maximum output current of the vehicle-mounted charger, the safety regulation condition is met. According to the next maximum output current of the vehicle-mounted charger and the sum of the demand current and the compensation current of the power battery, the smaller value of the next maximum output current and the demand current and the compensation current of the power battery is used as the new next output current of the vehicle-mounted charger and the control target current I for safely adjusting the output current of the vehicle-mounted charger C2 . And judging the safety adjustment condition of the new next output current of the vehicle-mounted charger until the output current of the vehicle-mounted charger does not meet the safety adjustment condition, judging the magnitude value of the required current and the next charging current of the power battery by the vehicle-mounted charger, and controlling the next output current of the vehicle-mounted charger to be adjusted and reduced if the required current of the power battery is smaller than the next charging current. And after the voltage is reduced, the vehicle-mounted charger continues to judge the required current of the power battery and the charging current after the voltage is reduced until the required current of the power battery is greater than the charging current of the power battery, the vehicle-mounted charger judges whether the power battery is completely charged, and if the required current, the required voltage and the charging current of the power battery sent by the CAN bus are not completely received again, the operations are repeated. And if the vehicle-mounted charger stops outputting the current and the voltage, stopping outputting the current and the voltage.
According to the embodiment of the invention, the current output current is initially adjusted according to the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current; determining that the next output current does not meet the current safety regulation condition according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and a preset difference current, and refreshing the required current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger again when the required current is smaller than the next charging current, and primarily regulating the current output current to obtain the refreshed next output current; and if the refreshed next output current does not meet the safety regulation condition, when the required current is smaller than the refreshed next charging current, continuously refreshing the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, and primarily regulating the current output current until the vehicle-mounted charger finishes charging the power battery. The output current of the vehicle-mounted charger is controlled according to the actual charging current of the power battery, so that the actual charging current for controlling the power battery is in a safe range to charge in real time, the circuit is protected to be safe, the utilization rate of the output power of the vehicle-mounted charger in the alternating current charging process is improved, the alternating current charging time is shortened, and the user experience is improved.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a current control device according to a third embodiment of the present invention, and as shown in fig. 3, the current control device includes: a primary adjustment module 310, a security adjustment module 320;
the initial adjustment module 310 is configured to perform initial adjustment on the current output current according to the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain a next output current;
the safety adjustment module 320 is configured to, according to a next output voltage of the vehicle-mounted charger, a maximum output current corresponding to the next output voltage, and a demand current, a next charging current and a preset difference current of the power battery, determine that the next output current meets a current safety adjustment condition, and perform safety adjustment on the next output current to obtain a new next output current; and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery.
Further, the initial tuning module 310 is specifically configured to:
determining the current maximum output current of the vehicle-mounted charger according to the current maximum output power and the current output voltage of the vehicle-mounted charger; when the current maximum output current is larger than the required current, setting the required current as the next output current; and when the current maximum output current is smaller than the required current, taking the current maximum output current as the next output current.
Further, the security adjustment module 320 is specifically configured to:
and if the required current is larger than the sum of the next charging current and the preset difference current and the next output current is smaller than the maximum output current corresponding to the next output voltage, determining the new next output current according to the current maximum output current and the sum of the required current and the compensation current.
Further, the security adjustment module 320 is further specifically configured to:
if the required current is smaller than the sum of the next charging current and a preset difference current or the next output current is larger than the current maximum output current, when the required current is smaller than the next charging current, refreshing the required current of the power battery and the current output current and the current output voltage of a vehicle-mounted charger again, and carrying out primary regulation on the current output current to obtain the next output current;
and if the next output current does not meet the safety regulation condition, continuously refreshing the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, and primarily regulating the current output current until the vehicle-mounted charger finishes charging the power battery.
Further, the security adjustment module 320 is specifically configured to:
if the current maximum output current is smaller than the sum of the demand current and the compensation current, taking the current output maximum output current as the new next output current;
and if the current maximum output current is larger than the sum of the demand current and the compensation current, the sum of the demand current and the compensation current is the new next output current.
Further, the security adjustment module 320 is specifically configured to:
and after the new next output current is safely adjusted, determining that the new next output current meets the current safety adjustment condition according to the new next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the new next output voltage, the required current of the power battery, the new next charging current and the preset difference current, and then safely adjusting the new next output current to obtain the latest next output current.
Further, the safety adjustment module 320 is specifically further configured to:
if the new next output current does not meet the safety regulation condition, determining that the new next output current meets the regulation and reduction condition according to the required current of the power battery and the new next charging current, and regulating and reducing the new next output current to obtain the regulation and reduction output current; and if the regulating and reducing output current meets the regulating and reducing condition, continuing regulating and reducing the regulating and reducing output current.
The current control device provided by the embodiment of the invention can execute the current control method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 4 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention, as shown in fig. 4, the vehicle includes a controller 41, a storage device 42, an input device 43, an output device 44, an on-board charger 45, and a power battery 46; the number of the controllers 41 in the vehicle may be one or more, and one controller 41 is illustrated in fig. 4; the controller 41, the storage device 43, the input device 44, and the output device 45 in the vehicle may be connected by a bus or other means, and the bus connection is exemplified in fig. 4.
And the vehicle-mounted charger 45 is used for providing electric energy for the power battery to store the energy.
And the power battery 46 is used for storing electric energy to provide an energy source for the electric automobile.
The storage device 42 is a computer-readable storage medium, and can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules (e.g., the initial adjustment module 310 and the safety adjustment module 320) corresponding to the air conditioning temperature zone conversion control method in the embodiment of the present invention. The controller 41 executes various functional applications and data processing of the vehicle by running software programs, instructions, and modules stored in the storage device 42, that is, implements the air conditioning temperature zone conversion control method described above.
The storage device 42 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the storage 42 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage device 42 may further include memory remotely located from the controller 41, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 43 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the vehicle. The output device 44 may include a display device such as a display screen.
The controller 41 executes various functional applications and data processing by executing programs stored in the system storage device 42, for example, implementing a current control method provided by an embodiment of the present invention, the method including:
according to the demand current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current;
according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and the preset difference current, determining that the next output current meets the current safety adjustment condition, and performing safety adjustment on the next output current to obtain a new next output current;
and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery.
EXAMPLE five
An embodiment of the present invention further provides a storage medium including computer-executable instructions, which when executed by a computer processor, are configured to perform a current control method, including:
according to the demand current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current;
according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and the preset difference current, determining that the next output current meets the current safety adjustment condition, and performing safety adjustment on the next output current to obtain a new next output current;
and if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A current control method is characterized by being applied to a vehicle-mounted charger for charging a power battery, and comprising the following steps:
according to the demand current of the power battery, the current output current and the current output voltage of the vehicle-mounted charger, primarily adjusting the current output current to obtain the next output current;
according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the demand current of the power battery, the next charging current and the preset difference current, if the next output current meets the current safety regulation condition, the next output current is safely regulated to obtain a new next output current;
if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery;
the method for primarily adjusting the current output current according to the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current comprises the following steps:
determining the current maximum output current of the vehicle-mounted charger according to the current maximum output power and the current output voltage of the vehicle-mounted charger;
when the current maximum output current is larger than the required current, taking the required current as the next output current;
when the current maximum output current is smaller than the demand current, taking the current maximum output current as the next output current;
the method comprises the following steps of determining that the next output current meets a current safety adjustment condition according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and a preset difference current, and then safely adjusting the next output current to obtain a new next output current, wherein the method comprises the following steps:
if the demand current is larger than the sum of the next charging current and the preset difference current and the next output current is smaller than the current maximum output current, determining the new next output current according to the current maximum output current and the sum of the demand current and the compensation current;
the compensation current is the difference current of the demand current of the power battery and the next charging current of the power battery.
2. The method of claim 1, further comprising:
if the required current is smaller than the sum of the next charging current and a preset difference current or the next output current is larger than the maximum output current corresponding to the next output voltage, refreshing the required current of the power battery, the current output current of the vehicle-mounted charger and the current output voltage again when the required current is smaller than the next charging current, and primarily adjusting the current output current to obtain the next output current;
and if the next output current does not meet the safety regulation condition, continuously refreshing the required current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger, and primarily regulating the current output current until the vehicle-mounted charger finishes charging the power battery.
3. The method of claim 1, wherein the safely adjusting the next output current to obtain a new next output current comprises:
if the current maximum output current is smaller than the sum of the demand current and the compensation current, taking the current maximum output current as the new next output current;
and if the current maximum output current is larger than the sum of the demand current and the compensation current, the sum of the demand current and the compensation current is the new next output current.
4. The method of claim 1, wherein continuing to safely adjust the new next output current if the new next output current satisfies a current safe adjustment condition comprises:
and after the new next output current is safely adjusted, determining that the new next output current meets the current safety adjustment condition according to the new next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the new next output voltage, the required current of the power battery, the new next charging current and the preset difference current, and then safely adjusting the new next output current to obtain the latest next output current.
5. The method of claim 4, wherein said safely adjusting said new next output current, after obtaining a latest next output current, further comprises:
after the safe adjustment is performed on the new next output current to obtain the latest next output current, the method further includes:
if the new next output current does not meet the safety adjustment condition, determining that the new next output current meets the regulation and reduction condition according to the required current of the power battery and the new next charging current, and regulating and reducing the new next output current to obtain the regulated and reduced output current;
and if the regulating and reducing output current meets the regulating and reducing condition, continuing regulating and reducing the regulating and reducing output current.
6. A current control device, comprising:
the primary regulation module is used for carrying out primary regulation on the current output current according to the demand current of the power battery and the current output current and the current output voltage of the vehicle-mounted charger to obtain the next output current;
the safety adjustment module is used for determining that the next output current meets a current safety adjustment condition according to the next output voltage of the vehicle-mounted charger, the maximum output current corresponding to the next output voltage, the required current of the power battery, the next charging current and a preset difference current, and then safely adjusting the next output current to obtain a new next output current; if the new next output current meets the current safety adjustment condition, continuing to perform safety adjustment on the new next output current until the vehicle-mounted charger finishes charging the power battery;
the initial adjustment module is specifically used for:
determining the current maximum output current of the vehicle-mounted charger according to the current maximum output power and the current output voltage of the vehicle-mounted charger; when the current maximum output current is larger than the required current, setting the required current as the next output current; when the current maximum output current is smaller than the demand current, taking the current maximum output current as the next output current;
the safety adjustment module is specifically configured to:
if the demand current is larger than the sum of the next charging current and the preset difference current and the next output current is smaller than the maximum output current corresponding to the next output voltage, determining the new next output current according to the current maximum output current and the sum of the demand current and the compensation current;
the compensation current is the difference current of the demand current of the power battery and the next charging current of the power battery.
7. A vehicle, characterized in that the vehicle comprises: the system comprises a vehicle-mounted charger, a power battery, one or more processors and a storage device;
the vehicle-mounted charger is used for charging the power battery;
the power battery is used for storing electric energy to provide power for the vehicle;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a current control method as recited in any of claims 1-5.
8. A storage medium containing computer executable instructions for performing the current control method of any one of claims 1-5 when executed by a computer processor.
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| CN202011563459.4A CN112721680B (en) | 2020-12-25 | 2020-12-25 | Current control method and device, vehicle and storage medium |
| PCT/CN2021/140827 WO2022135522A1 (en) | 2020-12-25 | 2021-12-23 | Current control method and device, vehicle and storage medium |
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