CN110696649A - Control system and charging control method of vehicle-mounted charger - Google Patents
Control system and charging control method of vehicle-mounted charger Download PDFInfo
- Publication number
- CN110696649A CN110696649A CN201910962599.XA CN201910962599A CN110696649A CN 110696649 A CN110696649 A CN 110696649A CN 201910962599 A CN201910962599 A CN 201910962599A CN 110696649 A CN110696649 A CN 110696649A
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- power battery
- charging mode
- voltage
- charging
- maximum voltage
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Classifications
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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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- 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
-
- 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
-
- 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 control system of a vehicle-mounted charger, which comprises a BMS battery management system, a power battery end information acquisition module, a power battery and a charger module; the power battery terminal information acquisition module acquires information of a power battery in real time, wherein the information comprises voltage, current and temperature; the charging mode comprises a constant current charging mode, a constant voltage charging mode, a positive pulse charging mode and a negative pulse charging mode. In the invention, a constant current charging-positive and negative pulse charging-constant voltage charging mode is adopted, and when the electric quantity of the power battery is lower, a larger charging current is used for constant current charging, so that the charging speed is improved; when the voltage reaches a set value, positive and negative pulse charging is changed, a short reverse pulse is used for eliminating the polarization phenomenon generated in the positive charging process, and the loop resistance is reduced, so that the charging efficiency is improved; when the battery is about to be full of, convert to the constant voltage charging mode, avoid causing the injury to the battery.
Description
Technical Field
The invention relates to the field of vehicle-mounted chargers, in particular to a control system and a charging control method of the vehicle-mounted charger.
Background
With the increasing exhaustion of non-renewable resources such as petroleum and the increasing severity of environmental pollution problems, the vigorous development of new energy automobile industry is undoubtedly an important means for effectively relieving energy crisis and environmental problems. The new energy automobile has the advantages of zero emission, high efficiency, low noise and the like.
At present, new energy vehicles are becoming the development direction of the future automobile industry, and after more than ten years of global development, people gradually reach consensus on the electric energy supply mode of pure electric vehicles: the mainstream mode is valley power charging, and the full charge of the pure electric vehicle is required within 6-8 hours of slow charging time in the valley power period of eight hours late at night.
At present, a charging system of a pure electric vehicle generally comprises a vehicle-mounted charger, a battery and a management system (BMS) thereof, a charging pile, a high-voltage wire and the like. They communicate with each other via the CAN bus. The charger receives 220V alternating current of the charging pile, and the alternating current is converted into high-voltage direct current through the rectifying circuit to charge the battery.
The charging mode has a significant impact on charging time, efficiency, and battery life. How to obtain an optimization scheme among charging time, efficiency and battery life becomes a problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problem, the invention provides a control system of a vehicle-mounted charger, which comprises a BMS battery management system, a power battery end information acquisition module, a power battery and a charger module,
the BMS battery management system is respectively connected with the power battery end information acquisition module and the charger module through signals,
the power battery end information acquisition module is connected with the power battery,
the charger module is connected with the power battery,
the power battery end information acquisition module acquires the information of the power battery in real time and transmits the information to the BMS battery management system,
the BMS battery management system receives the collected information of the power battery, judges the charging mode required by the power battery, feeds the charging mode back to the charger module,
and the charger module starts the charging mode to charge the power battery.
Further, the power battery end information acquisition module acquires information of the power battery in real time, wherein the information includes voltage, current and temperature.
Further, the charging modes include a constant current charging mode, a constant voltage charging mode, a positive pulse charging mode and a negative pulse charging mode.
The invention also provides a charging control method of the vehicle-mounted charger, which utilizes the control system of the vehicle-mounted charger to control charging and comprises the following specific steps:
s1, acquiring the voltage, the current and the temperature of the power battery in real time through the power battery end information acquisition module, transmitting the voltage, the current and the temperature to the BMS battery management system,
s2, the BMS battery management system compares the received voltage, current and temperature of the power battery with the set critical value or target value, selects a proper charging mode and feeds back the charging mode to the charger module,
s3, the charger module starts the charging mode to charge the power battery,
and S4, when the power battery terminal information acquisition module acquires that the voltage of the power battery reaches the saturation voltage, the BMS battery management system controls the charger module to stop charging.
Further, the method for selecting the charging mode in step S2 is as follows:
s1, setting the maximum voltage 1 in the constant current charging mode, the maximum voltage 2 in the positive pulse charging mode, the maximum voltage 3 in the negative pulse charging mode and the maximum voltage 4 in the constant voltage charging mode,
the maximum voltage 1< maximum voltage 2< maximum voltage 3< maximum voltage 4,
s2, when the power battery end information acquisition module acquires the real-time voltage 5 of the power battery:
when the real-time voltage is 5< the maximum voltage is 1, selecting a constant current charging mode;
selecting a forward pulse charging mode when the maximum voltage 1< the real-time voltage 5< the maximum voltage 2;
selecting a negative pulse charging mode when the maximum voltage is 2< the real-time voltage is 5< the maximum voltage is 3;
maximum voltage 3< real time voltage 5< maximum voltage 4, constant voltage charging mode is selected.
Further, when the power battery end information acquisition module acquires that the voltage, the current and the temperature of the power battery are higher than a set critical value or a set target value in real time, the charging mode is cut off, and an alarm signal is sent out.
The invention has the advantages that the invention adopts the constant current charging-positive and negative pulse charging-constant voltage charging mode, when the electric quantity of the power battery is lower, the acceptance capability of the power battery to the heavy current is stronger, the constant current charging is carried out by using larger charging current, and the charging speed is improved; along with the increase of electric quantity, the charging current is gradually reduced, when the voltage reaches a set value, the charging is changed into positive and negative pulse charging, the polarization phenomenon generated in the positive charging process is eliminated by using a short reverse pulse, the loop resistance is reduced, the charging efficiency is further improved, and meanwhile, the positive effect on reducing the charging temperature is achieved; when the battery is about to be full of, convert to the constant voltage charging mode, avoid causing the injury to the battery.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.
Examples
The embodiment discloses a control system of a vehicle-mounted charger, which comprises a BMS battery management system, a power battery end information acquisition module, a power battery and a charger module,
the BMS battery management system is respectively in signal connection with the power battery end information acquisition module and the charger module, the power battery end information acquisition module is connected with the power battery, the charger module is connected with the power battery, the power battery end information acquisition module acquires information of the power battery in real time and transmits the information to the BMS battery management system, and the power battery end information acquisition module acquires information of the power battery in real time, wherein the information comprises voltage, current and temperature.
The BMS battery management system receives the collected information of the power battery, judges the charging mode required by the power battery, and feeds the charging mode back to the charger module, wherein the charging mode comprises a constant-current charging mode, a constant-voltage charging mode, a positive pulse charging mode and a negative pulse charging mode. And the charger module starts the charging mode to charge the power battery.
The charging control method of the vehicle-mounted charger comprises the following steps:
presetting maximum voltage 1 in a constant current charging mode, maximum voltage 2 in a positive pulse charging mode, maximum voltage 3 in a negative pulse charging mode and maximum voltage 4 in a constant voltage charging mode in a processor of a vehicle management system, wherein the maximum voltage 1 is less than the maximum voltage 2, the maximum voltage 3 is less than the maximum voltage 4;
when the power battery terminal information acquisition module acquires the real-time voltage 5 of the power battery:
when the real-time voltage is 5< the maximum voltage is 1, selecting a constant current charging mode;
selecting a forward pulse charging mode when the maximum voltage 1< the real-time voltage 5< the maximum voltage 2;
selecting a negative pulse charging mode when the maximum voltage is 2< the real-time voltage is 5< the maximum voltage is 3;
maximum voltage 3< real time voltage 5< maximum voltage 4, constant voltage charging mode is selected.
The charging control process is as follows:
s1, acquiring the voltage, the current and the temperature of the power battery in real time through the power battery end information acquisition module, transmitting the voltage, the current and the temperature to the BMS battery management system,
s2, the BMS battery management system compares the received voltage, current and temperature of the power battery with the set critical value or target value, selects a proper charging mode and feeds back the charging mode to the charger module,
s3, the charger module starts the charging mode to charge the power battery,
and S4, when the power battery terminal information acquisition module acquires that the voltage of the power battery reaches the saturation voltage, the BMS battery management system controls the charger module to stop charging.
When the charger module works, the power battery end information acquisition module acquires that the voltage, the current and the temperature of the power battery are higher than a set critical value or a set target value in real time, the charging mode is cut off, and an alarm signal is sent out.
The invention adopts a constant current charging-positive and negative pulse charging-constant voltage charging mode, when the electric quantity of the power battery is lower, the power battery has stronger acceptance capacity to large current, and larger charging current is used for constant current charging, thereby improving the charging speed; along with the increase of electric quantity, the charging current is gradually reduced, when the voltage reaches a set value, the charging is changed into positive and negative pulse charging, the polarization phenomenon generated in the positive charging process is eliminated by using a short reverse pulse, the loop resistance is reduced, the charging efficiency is further improved, and meanwhile, the positive effect on reducing the charging temperature is achieved; when the battery is about to be full of, convert to the constant voltage charging mode, avoid causing the injury to the battery.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. A control system of a vehicle-mounted charger is characterized by comprising a BMS battery management system, a power battery end information acquisition module, a power battery and a charger module,
the BMS battery management system is respectively connected with the power battery end information acquisition module and the charger module through signals,
the power battery end information acquisition module is connected with the power battery,
the charger module is connected with the power battery,
the power battery end information acquisition module acquires the information of the power battery in real time and transmits the information to the BMS battery management system,
the BMS battery management system receives the collected information of the power battery, judges the charging mode required by the power battery, feeds the charging mode back to the charger module,
and the charger module starts the charging mode to charge the power battery.
2. The control system of the vehicle-mounted charger according to claim 1, wherein the power battery end information acquisition module acquires information of the power battery in real time, wherein the information includes voltage, current and temperature.
3. The control system of the vehicle-mounted charger according to claim 1, wherein the charging modes include a constant current charging mode, a constant voltage charging mode, a positive pulse charging mode and a negative pulse charging mode.
4. A charging control method of a vehicle-mounted charger utilizes the control system of the vehicle-mounted charger of any one of claims 1 to 3 to control charging, and is characterized by comprising the following specific steps:
s1, acquiring the voltage, the current and the temperature of the power battery in real time through the power battery end information acquisition module, transmitting the voltage, the current and the temperature to the BMS battery management system,
s2, the BMS battery management system compares the received voltage, current and temperature of the power battery with the set critical value or target value, selects a proper charging mode and feeds back the charging mode to the charger module,
s3, the charger module starts the charging mode to charge the power battery,
and S4, when the power battery terminal information acquisition module acquires that the voltage of the power battery reaches the saturation voltage, the BMS battery management system controls the charger module to stop charging.
5. The charging control method of the vehicle-mounted charger according to claim 4, wherein the selection method of the charging mode in the step S2 is as follows:
s1, setting the maximum voltage 1 in the constant current charging mode, the maximum voltage 2 in the positive pulse charging mode, the maximum voltage 3 in the negative pulse charging mode and the maximum voltage 4 in the constant voltage charging mode,
the maximum voltage 1< maximum voltage 2< maximum voltage 3< maximum voltage 4,
s2, when the power battery end information acquisition module acquires the real-time voltage 5 of the power battery:
when the real-time voltage is 5< the maximum voltage is 1, selecting a constant current charging mode;
selecting a forward pulse charging mode when the maximum voltage 1< the real-time voltage 5< the maximum voltage 2;
selecting a negative pulse charging mode when the maximum voltage is 2< the real-time voltage is 5< the maximum voltage is 3;
maximum voltage 3< real time voltage 5< maximum voltage 4, constant voltage charging mode is selected.
6. The charging control method of the vehicle-mounted charger according to claim 4, wherein when the power battery end information acquisition module acquires that the voltage, the current and the temperature of the power battery are higher than the set critical value or the target value in real time, the charging mode is cut off, and an alarm signal is sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910962599.XA CN110696649A (en) | 2019-10-11 | 2019-10-11 | Control system and charging control method of vehicle-mounted charger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910962599.XA CN110696649A (en) | 2019-10-11 | 2019-10-11 | Control system and charging control method of vehicle-mounted charger |
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| CN110696649A true CN110696649A (en) | 2020-01-17 |
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| CN201910962599.XA Withdrawn CN110696649A (en) | 2019-10-11 | 2019-10-11 | Control system and charging control method of vehicle-mounted charger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113401006A (en) * | 2021-07-06 | 2021-09-17 | 山东元齐新动力科技有限公司 | Vehicle-mounted lithium battery charging method and system |
| WO2023035162A1 (en) * | 2021-09-08 | 2023-03-16 | 宁德时代新能源科技股份有限公司 | Method for charging power battery and battery management system |
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