CN111376795A - Control method and system for heating battery of electric automobile and electric automobile - Google Patents
Control method and system for heating battery of electric automobile and electric automobile Download PDFInfo
- Publication number
- CN111376795A CN111376795A CN201811639127.2A CN201811639127A CN111376795A CN 111376795 A CN111376795 A CN 111376795A CN 201811639127 A CN201811639127 A CN 201811639127A CN 111376795 A CN111376795 A CN 111376795A
- Authority
- CN
- China
- Prior art keywords
- motor
- pulse width
- width modulation
- battery
- electric automobile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to the field of electric automobiles, and discloses a control method and a control system for heating a battery of an electric automobile, and the electric automobile. The control method comprises the following steps: calculating a pulse width modulation signal according to the current position of a rotor of a motor of the electric automobile; controlling the on-off of a switching element of an inverter of the electric automobile according to the pulse width modulation signal so as to output a control voltage; and applying the control voltage to a stator coil of the motor to generate a current that forms a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil. According to the control method, the additional arrangement of a heater is not needed, and the heating and the temperature rise of the circulating liquid introduced into the battery can be realized on the basis of ensuring that the motor cannot rotate by controlling the permanent magnet synchronous motor arranged in the electric automobile.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a control method and a control system for heating a battery of an electric automobile and the electric automobile.
Background
The current battery heating method is to heat the circulating liquid introduced into the battery 20 by using the heater 10, so as to heat the battery, thereby avoiding the battery from losing activity due to too low temperature, as shown in fig. 1. However, this battery heating method requires a dedicated heater, which increases the cost.
Disclosure of Invention
The invention aims to provide a control method and a control system for heating a battery of an electric automobile and the electric automobile, which can realize heating and temperature rise of circulating liquid introduced into the battery on the basis of ensuring that a motor does not rotate by controlling a permanent magnet synchronous motor arranged on the electric automobile without additionally arranging a heater.
In order to achieve the above object, an aspect of the present invention provides a control method for heating a battery of an electric vehicle, the control method including: calculating a pulse width modulation signal according to the current position of a rotor of a motor of the electric automobile; controlling the on-off of a switching element of an inverter of the electric automobile according to the pulse width modulation signal so as to output a control voltage; and applying the control voltage to a stator coil of the motor to generate a current that forms a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil.
Optionally, the control method further includes: the current is modified by a closed loop control circuit based on a target heating power.
Optionally, the closed-loop control circuit is a proportional-integral (PI) closed-loop control circuit.
Optionally, the calculating a pulse width modulation signal according to the current position of the rotor of the motor of the electric vehicle includes: calculating a pulse width modulation signal by a sinusoidal pulse width modulation method according to a current position of a rotor of the motor.
Accordingly, another aspect of the present invention provides a control system for heating a battery of an electric vehicle, the control system comprising: the pulse width modulation device is used for calculating a pulse width modulation signal according to the current position of a rotor of the motor of the electric automobile; the inverter is used for controlling the on-off of a switching element of the inverter according to the pulse width modulation signal so as to output control voltage; and a control circuit for applying the control voltage to a stator coil of the motor to generate a current that forms a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil.
Optionally, the control system further includes: a closed loop control circuit for modifying the current based on a target heating power.
Optionally, the closed-loop control circuit is a proportional-integral (PI) closed-loop control circuit.
Optionally, the pulse width modulation apparatus is further configured to: calculating a pulse width modulation signal by a sinusoidal pulse width modulation method according to a current position of a rotor of the motor.
Accordingly, the invention also provides an electric automobile which comprises the control system for heating the battery of the electric automobile.
Through the technical scheme, the pulse width modulation signal is creatively calculated according to the current position of the rotor of the motor of the electric automobile, the on-off of the switching element of the inverter is controlled by the calculated pulse width modulation signal so as to output the control voltage, the control voltage is loaded to the stator coil of the motor, the current which forms a magnetic field only along the magnetic field direction of the rotor of the motor can be generated, and the battery is heated through the heat loss of the stator coil.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art battery heating using a heater;
FIG. 2 is a schematic diagram of a prior art motor control system for an electric vehicle;
FIG. 3 illustrates a control method for heating a battery of an electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a heating control manner of a permanent magnet synchronous motor according to an embodiment of the present invention;
FIG. 5 is a schematic flow diagram of a closed-loop control system for heating a motor according to an embodiment of the present invention; and
fig. 6 is a block diagram of a control system for heating a battery of an electric vehicle according to an embodiment of the present invention.
Description of the reference numerals
10 heater 20 battery
21 motor control device 22 inverter
23 motor 24 pulse width modulation device
25 control circuit
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Generally, a motor control system of an electric vehicle may include: as shown in fig. 2, a battery 20, a motor control device 21, an inverter 22, a motor 23, and the like are provided. Wherein the battery 20 is connected with the inverter 22 for supplying power to the inverter 22; the motor control device 21 is connected with the inverter 22 and used for providing a modulation control signal for the inverter 22; the inverter 22 is connected to the motor and is configured to control on/off of a switching element thereof according to the provided modulation control signal to output a corresponding control voltage to the motor 23, thereby controlling the operation of the motor 23.
Fig. 3 is a flowchart of a control method for heating a battery of an electric vehicle according to an embodiment of the present invention. As shown in fig. 3, the control method for heating a battery of an electric vehicle according to the present invention may include the steps of: step S301, calculating a pulse width modulation signal according to the current position of a rotor of a motor of the electric automobile; step S302, controlling the on-off of a switching element of an inverter of the electric automobile according to the pulse width modulation signal so as to output a control voltage; and a step S303 of applying the control voltage to a stator coil of the motor to generate a current forming a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil. The control method can calculate a pulse width modulation signal according to the current position of a rotor of a motor of the electric automobile, then the on-off of a switching element of an inverter is controlled by the calculated pulse width modulation signal so as to output a control voltage, the control voltage is loaded to a stator coil of the motor so as to generate a current, a magnetic field formed by the current has the same direction as the magnetic field of the rotor of the motor, and the battery is heated through the heat loss of the stator coil.
For step S301, the calculating a pulse width modulation signal according to the current position of the rotor of the motor of the electric vehicle may include: calculating a pulse width modulation signal by a Sinusoidal Pulse Width Modulation (SPWM) method according to a current position of a rotor of the motor. Specifically, according to the current position of the rotor of the motor, a reasonable duty ratio of the pulse width modulation signal is calculated by an SPWM method, and the duty ratio is a proportion of the on-time of the pulse signal for controlling the switching element relative to the whole period.
The invention adopts a vector control mode of a permanent magnet synchronous motor, takes the direction of a rotor magnetic field as a d axis and the direction leading by 90 degrees as a q axis, and forms a rotating coordinate system. The direction of the magnetic field formed by the combined current Is of a given Id and Iq makes an angle with the direction of the rotor magnetic field, a reasonable angle allows the maximum torque to be developed between the magnetic fields, as shown in fig. 4. When Id Is given only in different values and Iq Is 0, the magnetic field direction formed by the combined current Is forms an angle of 0 ° or 180 ° with the rotor magnetic field direction, and thus no electromagnetic torque Is generated at all. According to the principle, only given Id, the output current can be generated, the motor can not be operated, and the heat loss of the stator coil of the motor can be generated when the vehicle is in a static state, so that the circulating liquid led into the battery is heated and heated.
For step S302, switching elements of an inverter of the electric vehicle are controlled to be turned on and off according to the pwm signal to output a control voltage. The switching element is an Insulated Gate Bipolar Transistor (IGBT) element, and the IGBT element has the characteristics of high switching speed, large driving current and the like. Specifically, the pulse width modulation signals PWMa, PWMb, and PWMc for the three phases calculated in step S301 are applied to the IGBT elements of the inverter, and the on/off of the IGBT elements is controlled to output the control voltages Ua, Ub, and Uc for the three-phase (a, b, and c-phase) circuits, respectively.
For step S303, the control voltage is applied to the stator coil of the motor to generate a current that forms a magnetic field only in the direction of the rotor magnetic field of the motor, so that the battery is heated by heat loss of the stator coil. Specifically, the three-phase control voltages Ua, Ub, and Uc output from the inverter in step S302 are applied to the stator coils of the motor, respectively, whereby the stator coils generate three-phase currents, and the generated heat heats the circulating liquid flowing into the battery along with heat loss.
The control method may further include: the current is modified by a closed loop control circuit based on the target heating power. Wherein the closed-loop control circuit is a proportional-integral (PI) closed-loop control circuit. That is, the current value output by the PI closed-loop control circuit is the current Id by performing PI closed-loop control adjustment on the target heating power and the output actual heating power. The invention adopts the power closed-loop control circuit to control, and can ensure the consistency of the actual heating power output by the permanent magnet synchronous motor and the target heating power, thereby greatly improving the heating control precision, more effectively keeping the activity of the battery, and further improving the safety and the stability of the electric automobile in driving.
Specifically, a control process of heating the battery of the electric vehicle will now be explained and explained in detail, as shown in fig. 5.
According to the given target heating power and the output actual heating power, the current Id and the current Iq output by the PI closed-loop control circuit are equal to 0. Then, according to the magnitude of the current Id and the current position of the rotor of the motor, the pulse width modulation device calculates PWMa, PWMb, and PWMc signals having corresponding duty ratios for the three-phase circuit using an SPWM algorithm. Then, signals PWMa, PWMb and PWMc are applied to IGBT elements of the inverter, respectively, the inverter is controlled to output three-phase control voltages Ua, Ub and Uc by controlling on/off of the IGBT elements, and the three-phase control voltages Ua, Ub and Uc are applied to three phases of stator coils of the motor, respectively, the stator coils generating corresponding three-phase currents and generating some heat loss accompanied therewith, and the heat generated by the heat loss heats the circulating fluid flowing into the battery.
The control method is based on the existing permanent magnet synchronous motor of the electric automobile, adopts the vector control algorithm of the permanent magnet synchronous motor to reasonably and reliably control the permanent magnet synchronous motor, can avoid the increase of energy and cost consumption of components such as a heater and the like, and can ensure that the electric automobile has the function of heating the battery.
In summary, the present invention creatively calculates a pwm signal according to the current position of the rotor of the motor of the electric vehicle, and then controls the on/off of the switching element of the inverter by the calculated pwm signal to output a control voltage, and the control voltage is applied to the stator coil of the motor to generate a current that forms a magnetic field only in the direction of the magnetic field of the rotor of the motor, so as to heat the battery by the heat loss of the stator coil.
Accordingly, as shown in fig. 6, the present invention also provides a control system for heating a battery of an electric vehicle, which may include: a pulse width modulation device 24 for calculating a pulse width modulation signal according to a current position of a rotor of a motor of the electric vehicle; an inverter 22 for controlling the on/off of the switching element of the inverter to output a control voltage according to the pulse width modulation signal; and a control circuit 25 for applying the control voltage to a stator coil of the motor to generate a current that forms a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil.
Optionally, the control system further includes: a closed loop control circuit for modifying the current based on a target heating power.
Optionally, the closed-loop control circuit is a proportional-integral (PI) closed-loop control circuit.
Optionally, the pulse width modulation apparatus is further configured to: calculating a pulse width modulation signal by a sinusoidal pulse width modulation method according to a current position of a rotor of the motor.
For specific details and benefits of the control system for heating a battery of an electric vehicle according to the present invention, reference may be made to the above description of the control method for heating a battery of an electric vehicle, and further description is omitted here.
Correspondingly, the invention further provides an electric automobile which comprises the control system for heating the battery of the electric automobile.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. A control method for heating a battery of an electric vehicle, characterized by comprising:
calculating a pulse width modulation signal according to the current position of a rotor of a motor of the electric automobile;
controlling the on-off of a switching element of an inverter of the electric automobile according to the pulse width modulation signal so as to output a control voltage; and
the control voltage is applied to a stator coil of the motor to generate a current that forms a magnetic field only in the direction of the rotor magnetic field of the motor, so that the battery is heated by heat loss of the stator coil.
2. The control method according to claim 1, characterized by further comprising: the current is modified by a closed loop control circuit based on a target heating power.
3. The control method of claim 2, wherein the closed loop control circuit is a Proportional Integral (PI) closed loop control circuit.
4. The control method according to claim 1, wherein the calculating a pulse width modulation signal according to the current position of the rotor of the motor of the electric vehicle includes: calculating a pulse width modulation signal by a sinusoidal pulse width modulation method according to a current position of a rotor of the motor.
5. A control system for heating a battery of an electric vehicle, the control system comprising:
the pulse width modulation device is used for calculating a pulse width modulation signal according to the current position of a rotor of the motor of the electric automobile;
the inverter is used for controlling the on-off of a switching element of the inverter according to the pulse width modulation signal so as to output control voltage; and
a control circuit for applying the control voltage to a stator coil of the motor to generate a current that forms a magnetic field only in a rotor magnetic field direction of the motor, thereby heating the battery by heat loss of the stator coil.
6. The control system of claim 5, further comprising:
a closed loop control circuit for modifying the current based on a target heating power.
7. The control system of claim 6, wherein the closed loop control circuit is a Proportional Integral (PI) closed loop control circuit.
8. The control system of claim 5, wherein the pulse width modulation device is further configured to: calculating a pulse width modulation signal by a sinusoidal pulse width modulation method according to a current position of a rotor of the motor.
9. An electric vehicle, characterized in that it comprises a control system for heating a battery of an electric vehicle according to any one of claims 5-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639127.2A CN111376795A (en) | 2018-12-29 | 2018-12-29 | Control method and system for heating battery of electric automobile and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639127.2A CN111376795A (en) | 2018-12-29 | 2018-12-29 | Control method and system for heating battery of electric automobile and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111376795A true CN111376795A (en) | 2020-07-07 |
Family
ID=71214851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811639127.2A Pending CN111376795A (en) | 2018-12-29 | 2018-12-29 | Control method and system for heating battery of electric automobile and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111376795A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021213472A1 (en) * | 2020-04-22 | 2021-10-28 | 长城汽车股份有限公司 | Method and apparatus for controlling heating of battery pack, and entire vehicle controller |
| CN114094901A (en) * | 2021-11-30 | 2022-02-25 | 重庆长安新能源汽车科技有限公司 | Motor rotor position control method in power battery pulse heating process |
| CN114623081A (en) * | 2020-12-14 | 2022-06-14 | 丹佛斯（天津）有限公司 | Variable frequency compressor with adaptive heating power control and operation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065628A1 (en) * | 2001-02-14 | 2002-08-22 | Toyota Jidosha Kabushiki Kaisha | Power outputting device and vehicle mounting it, control method, storing medium and program for the power outputting device, drive device and vehicle mounting it, and, control method, storing medium and program for the drive device |
| US20110298427A1 (en) * | 2010-06-04 | 2011-12-08 | Honda Motor Co., Ltd. | Battery heating apparatus for vehicle |
| CN103392258A (en) * | 2011-02-24 | 2013-11-13 | Zf腓德烈斯哈芬股份公司 | Method and device for warming a traction battery of a vehicle |
| CN103580582A (en) * | 2012-08-06 | 2014-02-12 | 罗伯特·博世有限公司 | Control unit for an electric machine |
| CN107026591A (en) * | 2017-04-28 | 2017-08-08 | 广东美芝制冷设备有限公司 | Preheating system, method and the compressor of permagnetic synchronous motor |
| CN108306078A (en) * | 2018-03-07 | 2018-07-20 | 苏州汇川联合动力系统有限公司 | Power battery heating system and method |
| CN109067303A (en) * | 2018-09-27 | 2018-12-21 | 深圳市英威腾电气股份有限公司 | A kind of heating means of motor, device and frequency converter |
-
2018
- 2018-12-29 CN CN201811639127.2A patent/CN111376795A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065628A1 (en) * | 2001-02-14 | 2002-08-22 | Toyota Jidosha Kabushiki Kaisha | Power outputting device and vehicle mounting it, control method, storing medium and program for the power outputting device, drive device and vehicle mounting it, and, control method, storing medium and program for the drive device |
| US20110298427A1 (en) * | 2010-06-04 | 2011-12-08 | Honda Motor Co., Ltd. | Battery heating apparatus for vehicle |
| CN103392258A (en) * | 2011-02-24 | 2013-11-13 | Zf腓德烈斯哈芬股份公司 | Method and device for warming a traction battery of a vehicle |
| CN103580582A (en) * | 2012-08-06 | 2014-02-12 | 罗伯特·博世有限公司 | Control unit for an electric machine |
| CN107026591A (en) * | 2017-04-28 | 2017-08-08 | 广东美芝制冷设备有限公司 | Preheating system, method and the compressor of permagnetic synchronous motor |
| CN108306078A (en) * | 2018-03-07 | 2018-07-20 | 苏州汇川联合动力系统有限公司 | Power battery heating system and method |
| CN109067303A (en) * | 2018-09-27 | 2018-12-21 | 深圳市英威腾电气股份有限公司 | A kind of heating means of motor, device and frequency converter |
Non-Patent Citations (1)
| Title |
|---|
| 方啸虎: "《中国超硬材料新技术与进展》", 31 December 2003, 中国科学技术大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021213472A1 (en) * | 2020-04-22 | 2021-10-28 | 长城汽车股份有限公司 | Method and apparatus for controlling heating of battery pack, and entire vehicle controller |
| CN114623081A (en) * | 2020-12-14 | 2022-06-14 | 丹佛斯（天津）有限公司 | Variable frequency compressor with adaptive heating power control and operation method thereof |
| US11955915B2 (en) | 2020-12-14 | 2024-04-09 | Danfoss (Tianjin) Ltd. | Variable-frequency compressor with adaptive heating power control and method for operating the same |
| CN114094901A (en) * | 2021-11-30 | 2022-02-25 | 重庆长安新能源汽车科技有限公司 | Motor rotor position control method in power battery pulse heating process |
| CN114094901B (en) * | 2021-11-30 | 2023-05-02 | 重庆长安新能源汽车科技有限公司 | Motor rotor position control method in pulse heating process of power battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107154770B (en) | For controlling the electric system of motor | |
| US9849806B1 (en) | Current based six step control | |
| CN110707987B (en) | Method and apparatus for controlling cascaded inverter circuits and electric machines | |
| CN111376795A (en) | Control method and system for heating battery of electric automobile and electric automobile | |
| US9724997B2 (en) | Electric motor temperature compensation | |
| CN107026591B (en) | Preheating system and method of permanent magnet synchronous motor and compressor | |
| CN105610380B (en) | The method and apparatus for controlling motor with six-step mode | |
| US20180026567A1 (en) | Current conversion method and device and vehicle comprising such a device | |
| CN103684166B (en) | Comprise controller for motor vehicle and for the control method of vehicle | |
| CN103781654A (en) | Motor control system | |
| US10727776B2 (en) | Motor control device | |
| CN105529962A (en) | Torque ripple suppression method and control system of brushless DC motor | |
| WO2018155321A1 (en) | Control device and electric power steering device using same | |
| JP6080996B1 (en) | Electric motor drive system | |
| JP2017055552A (en) | Motor controller | |
| CN113472270B (en) | Motor circuit protection method and system thereof | |
| JP6802126B2 (en) | Inverter controller | |
| JP5888148B2 (en) | Rotating machine control device | |
| US9203329B2 (en) | Motor drive control system | |
| CN207460042U (en) | A kind of weak magnetic control system of electric vehicle | |
| Jiang et al. | Commutation torque ripple suppression strategy for brushless DC motors with commutation time in multiples of PWM period | |
| CN112769360B (en) | Control method and device for vehicle motor | |
| US10236809B2 (en) | Method and device for operating an electric machine | |
| CA2986558C (en) | Motor control device and motor control method | |
| US9502998B1 (en) | Systems and methods for controlling motor torque output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |