CN114194073A - Motor pulse current control method and device and electric automobile - Google Patents
Motor pulse current control method and device and electric automobile Download PDFInfo
- Publication number
- CN114194073A CN114194073A CN202111556450.5A CN202111556450A CN114194073A CN 114194073 A CN114194073 A CN 114194073A CN 202111556450 A CN202111556450 A CN 202111556450A CN 114194073 A CN114194073 A CN 114194073A
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- current
- output
- shaft
- power battery
- motor
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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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/429—Current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
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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 relates to a motor pulse current control method, a device and an electric automobile, wherein the method comprises the following steps: when the power battery is determined to have the pulse heating requirement, determining a current intermediate parameter based on the received pulse heating current request value of the power battery and the acquired current internal resistance of the power battery, and determining a current coefficient based on the acquired current terminal voltage of the power battery; determining the current of an output shaft to be output of the motor based on the current intermediate parameter and the current coefficient; and controlling the motor to output according to the current of the shaft to be output.
Description
Technical Field
The invention belongs to the technical field of power battery heating, and particularly relates to a motor pulse heating control method and device and an electric automobile.
Background
The charging and discharging capabilities of the power battery of the electric vehicle are limited in a low-temperature environment, and the power battery needs to be rapidly heated to a proper working temperature for normal use of the electric vehicle. Through the method of motor pulse current control can form high frequency pulse current at power battery both ends, and then carry out inside heating to power battery, this kind of heating method can carry out rapid heating to power battery, compares with traditional PTC heating technique and has bigger advantage: 1. the heating efficiency is high, and the battery heating efficiency is higher than that of the PTC; 2. no external hardware is required, thereby reducing the heating cost.
However, the following problems exist in the method of motor pulse current control: in the heating process, the internal resistance and the dynamic voltage of the power battery can change along with the change of factors such as temperature and battery SOC, and the size of the formed pulse current can change, so that the heating rate of the power battery can be influenced, and the risk of overcurrent of components, hardware burnout and the like can be caused by the increase of the current.
Disclosure of Invention
The invention provides a motor pulse heating current control method and device and an electric automobile, which are used for realizing accurate control of battery pulse current.
The technical scheme of the invention is as follows:
the invention provides a motor pulse current control method, which comprises the following steps:
when the power battery is determined to have the pulse heating requirement, determining a current intermediate parameter based on the received pulse heating current request value of the power battery and the acquired current internal resistance of the power battery, and determining a current coefficient based on the acquired current terminal voltage of the power battery;
determining the current of an output shaft to be output of the motor based on the current intermediate parameter and the current coefficient;
and controlling the motor to output according to the current of the shaft to be output.
Preferably, a current intermediate parameter corresponding to the pulse heating current request value and the current internal resistance is determined by inquiring a first preset calibration table;
and determining the current coefficient corresponding to the current terminal voltage by inquiring a second preset calibration table.
Preferably, the product of the current intermediate parameter and the current coefficient is determined as the current of the output shaft of the electric machine.
Preferably, the method further comprises:
collecting an actual output shaft current output value of the motor based on the shaft current;
judging whether the difference value between the shaft current output value and the current of the shaft to be output is within a preset standard range or not;
if the difference value between the shaft current output value and the current of the shaft to be output exceeds the preset standard range, the shaft voltage of the motor is adjusted, so that the difference value between the shaft current output value actually output by the motor at the next time and later and the current of the shaft to be output corresponding to the shaft current output value gradually approaches or enters the preset standard range.
The invention also provides a motor pulse current control device, which comprises:
the power battery heating control device comprises a first determining module, a second determining module and a control module, wherein the first determining module is used for determining a current intermediate parameter based on a received pulse heating current request value of the power battery and the acquired current internal resistance of the power battery and determining a current coefficient based on the acquired current terminal voltage of the power battery when the power battery is determined to have a pulse heating demand;
the second determination module is used for determining the current of an output shaft to be output of the motor based on the current intermediate parameter and the current coefficient;
and the control module is used for controlling the motor to output the current of the output shaft to be output.
The invention also provides an electric automobile which comprises the motor pulse current control device.
The technical scheme of the invention is as follows:
the control method of the motor pulse current changing along with the voltage and the resistance of the battery can realize the accurate control of the battery pulse current, thereby ensuring the stable heating rate under different battery voltages and internal resistances and ensuring the reliability and the safety of electrical elements.
Drawings
FIG. 1 is a control schematic diagram of a method according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, in an embodiment of the present invention, a method for controlling a pulse heating current of a motor is provided, where the method includes:
when the power battery is determined to have the pulse heating requirement, acquiring a pulse heating current request value of the power battery and the current internal resistance R of the power battery, and inputting the pulse current request value and the current internal resistance R of the power battery into a first preset calibration table to search current intermediate parameters (such as table 1).
TABLE 1
Finding out the current terminal voltage U of the battery through a second preset calibration table (such as table 2)xThe lower corresponding current coefficient α.
| Ux(V) | αx |
| 100 | |
| 200 | |
| 300 | |
| 400 | |
| …… |
TABLE 2
And then, the product of the current intermediate parameter and the current coefficient alpha is utilized to calculate the current of the output shaft to be actually requested.
The current of the output shaft to be output, which is obtained through the first preset calibration meter and the second preset calibration meter, can be stabilized in a certain range only by closed-loop control. The specific control method comprises the following steps: and acquiring the calculated average value of the actual output shaft current within 1s as a shaft current output value, comparing the shaft current output value with the current of the output shaft to be output, and gradually keeping the actual shaft current output value consistent with the current of the output shaft to be output corresponding to the actual shaft current output value by changing the shaft voltage of the motor.
In this embodiment, the horizontal axis of the first preset calibration table is the pulse heating current request value, and the vertical axis is the current internal resistance of the battery. In the preliminary experiment, the rated voltage U of the battery isNAnd then, finishing the current intermediate parameter calibration test under different battery bus currents under different battery internal resistances to obtain specific numerical values of all heating current request values listed in the table and the current intermediate parameters under the combination of the battery internal resistances.
And the second preset calibration table represents the influence of the dynamic voltage of the battery on the pulse current and is obtained through a calibration test. In the preliminary experiment, the voltage of the battery is UxThe battery bus current is set as the rated current, and the battery internal resistance is set as the nominal resistance RNCalibrating current coefficient, and calculating to obtain different battery voltages UxCorresponding current coefficient alphax。
Through the accurate control of the battery pulse current, the stable heating rate under different battery voltages and battery internal resistances is ensured, and the reliability and the safety of the electrical element are ensured.
In addition, in the embodiment, because the three-phase current of the motor is the pulse current which changes along with time in the pulse heating process, the current value obtained by calculation based on the real-time collected value is not a constant value, in order to make the output three-phase current consistent with the requirement, the calculated average value of the actual output shaft current collected within 1s can be used as an output value to be compared with the shaft current request value, and the shaft voltage of the motor is changed to make the difference value between the subsequent actual shaft current output value and the current of the output shaft smaller and smaller or enter a preset standard range, so that the stable control of the pulse current of the motor is realized.
The invention also provides a motor pulse current control device, which comprises:
the power battery heating control device comprises a first determining module, a second determining module and a control module, wherein the first determining module is used for determining a current intermediate parameter based on a received pulse heating current request value of the power battery and the acquired current internal resistance of the power battery and determining a current coefficient based on the acquired current terminal voltage of the power battery when the power battery is determined to have a pulse heating demand;
the second determination module is used for determining the current of an output shaft to be output of the motor based on the current intermediate parameter and the current coefficient;
and the control module is used for controlling the motor to output the current of the output shaft to be output.
The invention also provides an electric automobile which comprises the motor pulse current control device.
Claims (6)
1. A method of controlling a pulse current of an electric motor, comprising:
when the power battery is determined to have the pulse heating requirement, determining a current intermediate parameter based on the received pulse heating current request value of the power battery and the acquired current internal resistance of the power battery, and determining a current coefficient based on the acquired current terminal voltage of the power battery;
determining the current of an output shaft to be output of the motor based on the current intermediate parameter and the current coefficient;
and controlling the motor to output according to the current of the shaft to be output.
2. The method of claim 1, wherein the current intermediate parameter corresponding to the pulse heating current request value and the present internal resistance is determined by referring to a first predetermined calibration table;
and determining the current coefficient corresponding to the current terminal voltage by inquiring a second preset calibration table.
3. Method according to claim 1, characterized in that the product of the current intermediate parameter and the current coefficient is determined as the output shaft current of the electric machine.
4. The method of claim 1, further comprising:
collecting an actual output shaft current output value of the motor based on the shaft current;
judging whether the difference value between the shaft current output value and the current of the shaft to be output is within a preset standard range or not;
if the difference value between the shaft current output value and the current of the shaft to be output exceeds the preset standard range, the shaft voltage of the motor is adjusted, so that the difference value between the shaft current output value actually output by the motor at the next time and later and the current of the shaft to be output corresponding to the shaft current output value gradually approaches or enters the preset standard range.
5. An electric motor pulse current control apparatus, comprising:
the power battery heating control device comprises a first determining module, a second determining module and a control module, wherein the first determining module is used for determining a current intermediate parameter based on a received pulse heating current request value of the power battery and the acquired current internal resistance of the power battery and determining a current coefficient based on the acquired current terminal voltage of the power battery when the power battery is determined to have a pulse heating demand;
the second determination module is used for determining the current of an output shaft to be output of the motor based on the current intermediate parameter and the current coefficient;
and the control module is used for controlling the motor to output the current of the output shaft to be output.
6. An electric vehicle characterized by comprising the motor pulse current control device according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556450.5A CN114194073B (en) | 2021-12-17 | 2021-12-17 | Motor pulse current control method and device and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556450.5A CN114194073B (en) | 2021-12-17 | 2021-12-17 | Motor pulse current control method and device and electric automobile |
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| CN114194073A true CN114194073A (en) | 2022-03-18 |
| CN114194073B CN114194073B (en) | 2023-05-23 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006174597A (en) * | 2004-12-15 | 2006-06-29 | Fuji Heavy Ind Ltd | Battery warm-up controller for hybrid car |
| JP2010088167A (en) * | 2008-09-30 | 2010-04-15 | Denso Corp | Battery charge discharge control apparatus |
| US20120094152A1 (en) * | 2009-06-18 | 2012-04-19 | Guanglin Wu | Method and device for controlling battery heating |
| CN104064836A (en) * | 2014-06-17 | 2014-09-24 | 北京交通大学 | Low-temperature self-heating method for lithium ion battery |
| CN107910617A (en) * | 2017-11-15 | 2018-04-13 | 西安蜂语信息科技有限公司 | Battery heating means, device and battery heating module |
| CN108595729A (en) * | 2018-01-08 | 2018-09-28 | 北京理工大学 | A kind of power battery intelligence self-regulation heated current computational methods, battery heating means and battery management system based on BV equations |
| US20200328401A1 (en) * | 2016-06-08 | 2020-10-15 | Blue Solutions | Process for heat treating a lithium battery |
| CN111864313A (en) * | 2020-07-22 | 2020-10-30 | 欣旺达电动汽车电池有限公司 | Self-heating method and device for power battery and readable storage medium |
| CN112977173A (en) * | 2021-04-30 | 2021-06-18 | 重庆长安新能源汽车科技有限公司 | Electric automobile and power battery pulse heating system and heating method thereof |
| CN113193268A (en) * | 2021-04-30 | 2021-07-30 | 重庆长安新能源汽车科技有限公司 | Power battery pulse heating method and device and automobile |
| CN113733988A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Power battery heating method and device for electric automobile and automobile |
| CN113759258A (en) * | 2021-08-30 | 2021-12-07 | 重庆长安汽车股份有限公司 | Power battery SOC estimation method and device and pure electric vehicle |
| CN113752908A (en) * | 2020-06-04 | 2021-12-07 | 比亚迪股份有限公司 | Vehicle, energy conversion device, and control method therefor |
-
2021
- 2021-12-17 CN CN202111556450.5A patent/CN114194073B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006174597A (en) * | 2004-12-15 | 2006-06-29 | Fuji Heavy Ind Ltd | Battery warm-up controller for hybrid car |
| JP2010088167A (en) * | 2008-09-30 | 2010-04-15 | Denso Corp | Battery charge discharge control apparatus |
| US20120094152A1 (en) * | 2009-06-18 | 2012-04-19 | Guanglin Wu | Method and device for controlling battery heating |
| CN104064836A (en) * | 2014-06-17 | 2014-09-24 | 北京交通大学 | Low-temperature self-heating method for lithium ion battery |
| US20200328401A1 (en) * | 2016-06-08 | 2020-10-15 | Blue Solutions | Process for heat treating a lithium battery |
| CN107910617A (en) * | 2017-11-15 | 2018-04-13 | 西安蜂语信息科技有限公司 | Battery heating means, device and battery heating module |
| CN108595729A (en) * | 2018-01-08 | 2018-09-28 | 北京理工大学 | A kind of power battery intelligence self-regulation heated current computational methods, battery heating means and battery management system based on BV equations |
| CN113733988A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Power battery heating method and device for electric automobile and automobile |
| CN113752908A (en) * | 2020-06-04 | 2021-12-07 | 比亚迪股份有限公司 | Vehicle, energy conversion device, and control method therefor |
| CN111864313A (en) * | 2020-07-22 | 2020-10-30 | 欣旺达电动汽车电池有限公司 | Self-heating method and device for power battery and readable storage medium |
| CN112977173A (en) * | 2021-04-30 | 2021-06-18 | 重庆长安新能源汽车科技有限公司 | Electric automobile and power battery pulse heating system and heating method thereof |
| CN113193268A (en) * | 2021-04-30 | 2021-07-30 | 重庆长安新能源汽车科技有限公司 | Power battery pulse heating method and device and automobile |
| CN113759258A (en) * | 2021-08-30 | 2021-12-07 | 重庆长安汽车股份有限公司 | Power battery SOC estimation method and device and pure electric vehicle |
Non-Patent Citations (2)
| Title |
|---|
| 徐智慧;阮海军;姜久春;孙丙香;何锡添;: "温度自适应的锂离子电池低温自加热方法", 电源技术 * |
| 李德伟;陈实;吴锋;杨凯;胡道中;: "基于神经网络的动力电池荷电状态的预测", 计算机应用与软件 * |
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Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |