CN106945541B - Charging control method and system for online charging of power battery of pure electric vehicle - Google Patents
Charging control method and system for online charging of power battery of pure electric vehicle Download PDFInfo
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- CN106945541B CN106945541B CN201710098827.4A CN201710098827A CN106945541B CN 106945541 B CN106945541 B CN 106945541B CN 201710098827 A CN201710098827 A CN 201710098827A CN 106945541 B CN106945541 B CN 106945541B
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- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 230000001133 acceleration Effects 0.000 claims description 2
- 239000000306 component Substances 0.000 description 15
- 238000011217 control strategy Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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]
-
- 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
- B60L53/10—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 the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
-
- 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a charging control method and a charging control system for online charging of a power battery of an electric vehicle, which are characterized in that the maximum allowable charging current of the battery and the input current of a vehicle-mounted high-power component are collected in real time; meanwhile, instantaneous input current of the motor controller is obtained through calculation; obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller; the smaller value of the maximum allowable output current of the vehicle-mounted charger and the maximum output current of the charger is taken as the target output current of the charger, the charger supplies power according to the target output current, so that the online charging electric vehicle can be charged with the highest efficiency, the feedback energy of motor braking is preferentially recycled by the battery, and the battery can be protected.
Description
Technical Field
The invention relates to the technical field of electric vehicle charging, in particular to a charging control method and a charging control system for online charging of a power battery of an electric vehicle.
Background
The vehicle-mounted charger in the pure electric online charging vehicle type is one of the most core components, in order to improve the charging efficiency, when the power of the vehicle-mounted charger is relatively small, the charging current can be controlled in real time without considering, the maximum current output of the charger is only required to be used as the target output current of the vehicle-mounted charger, however, as the power of the vehicle-mounted charger is larger, and as the feedback power of the motor is increased, the occurrence of complicated working conditions such as the vehicle-driving side running and the network charging, which are unique to the pure electric online charging vehicle type, cannot simply use the maximum current output of the charger as the target output current of the charger, therefore, a control strategy of the vehicle-mounted charger is urgently required to be provided, the control strategy can coordinate the running states among the motor controller, the battery and the vehicle-mounted charger, namely the battery is charged as much as possible under the condition of the network running, and the energy braked by the motor is preferentially recovered, and can protect the battery, can not let the transient charging current of battery too big.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a charging control method and a charging control system which can improve the efficiency of a vehicle-mounted charger, can preferentially recover the feedback energy of motor braking by a battery, and can protect the battery for charging a power battery of a pure electric vehicle on line.
A charging control method for online charging of a power battery of an electric vehicle comprises the following steps:
s1, collecting the maximum allowable charging current of the battery and the input current of the vehicle-mounted high-power component in real time;
s2, obtaining instantaneous input current of the motor controller according to the instantaneous power of the motor required by the current electric automobile in running and by combining the current battery voltage;
s3, obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller;
and S4, comparing the maximum allowable output current of the vehicle-mounted charger with the maximum output current of the charger, taking the smaller value as the target output current of the charger, and supplying power by the charger according to the target output current.
The charging control system for the online charging of the power battery of the pure electric vehicle comprises the following functional modules:
the current acquisition module is used for acquiring the maximum allowable charging current of the battery and the input current of the vehicle-mounted high-power component in real time;
the instantaneous current calculation module is used for obtaining the instantaneous input current of the motor controller according to the instantaneous power of the motor required by the current running of the electric automobile and by combining the current battery voltage;
the maximum current statistical module is used for obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller;
and the charging current determining module is used for comparing the maximum allowable output current of the vehicle-mounted charger with the maximum output current of the charger, taking the smaller value as the target output current of the charger, and supplying power by the charger according to the target output current.
The invention provides a charging control method and a charging control system for online charging of a power battery of an electric vehicle, which are characterized in that the maximum allowable charging current of the battery and the input current of a vehicle-mounted high-power component are collected in real time; meanwhile, instantaneous input current of the motor controller is obtained through calculation; obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller; the smaller value of the maximum allowable output current of the vehicle-mounted charger and the maximum output current of the charger is taken as the target output current of the charger, the charger supplies power according to the target output current, so that the online charging electric vehicle can be charged with the highest efficiency, the feedback energy of motor braking is preferentially recycled by the battery, and the battery can be protected.
Drawings
Fig. 1 is a flowchart of an architecture of a charging control method for online charging of a power battery of an electric vehicle according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
The invention provides a charging control method for an online charging electric vehicle power battery, which comprises the following steps of:
and S1, collecting the maximum allowable charging current of the battery and the input current of the vehicle-mounted high-power component in real time.
The input current of the vehicle-mounted high-power component comprises DC/AC input current and air conditioner input current.
In particular, during actual operation, the maximum allowable charging current I of the batteryBMSThe BMS battery management system sends the current states of monomer voltage, SOC, total voltage, temperature and the like to the vehicle control unit through CAN messages for collection, and DC/AC input current IDCACAnd air conditioner input current IAir conditionerThe corresponding parts are also sent to the vehicle control unit through CAN messages for collection, or the vehicle control unit is obtained through sampling of a current sensor.
And S2, obtaining the instantaneous input current of the motor controller according to the instantaneous power of the motor required by the current running of the electric automobile and the current battery voltage.
The motor controller has a positive and negative value of instantaneous input current according to different working states, when the motor controller is driven, the instantaneous input current is positive, and when the motor controller is braked, the instantaneous input current is negative. The vehicle control unit calculates the instantaneous input current of the motor controller according to an acceleration pedal or a brake pedal stepped by a driver, and the method specifically comprises the following steps:
when the motor is in a driving state:
Imotor controllerMotor peak drive power/UBattery；
When the motor is in a braking state:
Imotor controllerMotor peak brake power/UBattery。
And S3, obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller.
The maximum allowable charging current of the battery is added with the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller, so that the maximum allowable output current of the vehicle-mounted charger is obtained, namely,
IMAX＝IBMS+IDCAC+Iair conditioner+IMotor controller
And S4, comparing the maximum allowable output current of the vehicle-mounted charger with the maximum output current of the charger, taking the smaller value as the target output current of the charger, and supplying power by the charger according to the target output current.
Specifically, after the maximum allowable output current of the vehicle-mounted charger is obtained, the maximum allowable output current of the vehicle-mounted charger is compared with the maximum output current of the charger, the smaller value of the maximum allowable output current of the vehicle-mounted charger and the maximum output current of the charger is selected as the target output current of the charger, and the target output current is sent to the charger to be executed in a CAN message mode.
It can be seen that under the driving condition, the charger can output with a relatively large power, under the braking condition, the calculated current is relatively small, even 0, and the charger reduces the output current along with the braking current of the motor, even the output current is 0, so that the aims of preferentially feeding back the braking energy under the condition of protecting the battery and carrying out the highest-efficiency charging under the condition of protecting the battery are fulfilled.
Based on the charging control method for the online charging electric vehicle power battery, the invention also provides a charging control system for the online charging electric vehicle power battery, and the charging control system for the online charging electric vehicle power battery comprises the following functional modules:
the current acquisition module is used for acquiring the maximum allowable charging current of the battery and the input current of the vehicle-mounted high-power component in real time;
the instantaneous current calculation module is used for obtaining the instantaneous input current of the motor controller according to the instantaneous power of the motor required by the current running of the electric automobile and by combining the current battery voltage;
the maximum current statistical module is used for obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller;
and the charging current determining module is used for comparing the maximum allowable output current of the vehicle-mounted charger with the maximum output current of the charger, taking the smaller value as the target output current of the charger, and supplying power by the charger according to the target output current.
The invention provides a charging control method and a charging control system for online charging of a power battery of an electric vehicle, which are characterized in that the maximum allowable charging current of the battery and the input current of a vehicle-mounted high-power component are collected in real time; meanwhile, instantaneous input current of the motor controller is obtained through calculation; obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller; the smaller value of the maximum allowable output current of the vehicle-mounted charger and the maximum output current of the charger is taken as the target output current of the charger, the charger supplies power according to the target output current, so that the online charging electric vehicle can be charged with the highest efficiency, the feedback energy of motor braking is preferentially recycled by the battery, and the battery can be protected.
The above apparatus embodiments and method embodiments are in one-to-one correspondence, and reference may be made to the method embodiments for a brief point of the apparatus embodiments.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in random access memory, read only memory, electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. A charging control method for online charging of a pure electric vehicle power battery is characterized by comprising the following steps:
s1, collecting the maximum allowable charging current of the battery and the input current of the vehicle-mounted high-power component in real time;
s2, obtaining instantaneous input current of the motor controller according to the instantaneous power of the motor required by the current electric automobile in running and by combining the current battery voltage;
the instantaneous input current of the motor controller is calculated by the vehicle control unit according to an acceleration pedal or a brake pedal stepped by a driver, and the instantaneous input current of the motor controller is calculated by the vehicle control unit according to the following steps:
when the motor is in a driving state:
Imotor controllerMotor peak drive power/UBattery；
When the motor is in a braking state:
Imotor controllerMotor peak brake power/UBattery；
S3, obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller;
the maximum allowable charging current of the battery is added with the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller, so that the maximum allowable output current of the vehicle-mounted charger is obtained, namely,
IMAX＝IBMS+IDCAC+Iair conditioner+IMotor controller
S4, comparing the maximum allowable output current of the vehicle-mounted charger with the maximum output current of the charger, taking the smaller value as the target output current of the charger, and supplying power by the charger according to the target output current;
the input current of the vehicle-mounted high-power component comprises DC/AC input current and air conditioner input current, the input current is positive when the motor controller is driven, and the input current is negative when the motor controller is braked.
2. The charging control system for the online charging of the pure electric vehicle power battery is characterized by comprising the following functional modules:
the current acquisition module is used for acquiring the maximum allowable charging current of the battery and the input current of the vehicle-mounted high-power component in real time;
the instantaneous current calculation module is used for obtaining the instantaneous input current of the motor controller according to the instantaneous power of the motor required by the current running of the electric automobile and by combining the current battery voltage;
the maximum current statistical module is used for obtaining the current maximum allowable output current of the vehicle-mounted charger according to the maximum allowable charging current of the battery, the input current of the vehicle-mounted high-power component and the instantaneous input current of the motor controller;
and the charging current determining module is used for comparing the maximum allowable output current of the vehicle-mounted charger with the maximum output current of the charger, taking the smaller value as the target output current of the charger, and supplying power by the charger according to the target output current.
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| CN201710098827.4A CN106945541B (en) | 2017-02-23 | 2017-02-23 | Charging control method and system for online charging of power battery of pure electric vehicle |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106945541B (en) * | 2017-02-23 | 2020-02-04 | 扬子江汽车集团有限公司 | Charging control method and system for online charging of power battery of pure electric vehicle |
| CN110015131A (en) * | 2017-09-04 | 2019-07-16 | 郑州宇通客车股份有限公司 | A kind of fuel-cell vehicle dynamical system control method and device |
| CN109980710B (en) * | 2017-12-28 | 2020-10-02 | 郑州宇通客车股份有限公司 | Charging system and charging control method of plug-in type composite power supply vehicle |
| DE102018201934A1 (en) * | 2018-02-07 | 2019-08-08 | HELLA GmbH & Co. KGaA | Charging control device for motor vehicles |
| CN108718106B (en) * | 2018-06-26 | 2020-05-01 | 深圳极数充物联技术有限公司 | Wireless charging system for electric automobile |
| CN112721680B (en) * | 2020-12-25 | 2023-04-18 | 中国第一汽车股份有限公司 | Current control method and device, vehicle and storage medium |
| 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 |
| CN113511089B (en) * | 2021-08-10 | 2022-12-02 | 三一汽车起重机械有限公司 | Charging control method and device and working machine |
| CN114475289B (en) * | 2022-02-28 | 2024-02-02 | 西安领充无限新能源科技有限公司 | Online charging control method |
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| US4108288A (en) * | 1976-07-06 | 1978-08-22 | Fuji Electric Co., Ltd. | Current collector shoe suspension for externally powered electric vehicle |
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