CN111845447B - Battery safety control method and analog control device thereof - Google Patents
Battery safety control method and analog control device thereof Download PDFInfo
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- CN111845447B CN111845447B CN202010757093.8A CN202010757093A CN111845447B CN 111845447 B CN111845447 B CN 111845447B CN 202010757093 A CN202010757093 A CN 202010757093A CN 111845447 B CN111845447 B CN 111845447B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000006399 behavior Effects 0.000 abstract 2
- 238000012360 testing method Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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
- 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
- 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
- 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
-
- 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
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- 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
Abstract
The invention belongs to the technical field of electric automobiles, and particularly relates to a battery safety control method and an analog control device thereof. The control method can adaptively adjust the behavior of the vehicle according to the working state of the power battery, effectively ensure the safety of the battery and ensure the driving safety of a user. The simulation control device can simulate driving behaviors under different working conditions, timely know the working performance and the state of the power battery, conveniently and efficiently optimize a battery management strategy, improve vehicle performance and guarantee driving safety of a user.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a battery safety control method and an analog control device thereof.
Background
The power battery is the main power source of the electric automobile. The discharge characteristics of the power battery can change along with the change of the temperature environment. In order to improve the working efficiency of the power battery, prolong the endurance mileage of the power battery and guarantee the driving safety, a power battery management strategy is generally designed and optimized in the vehicle development process. However, the development period of the vehicle is long, the variables are large, the cost and the efficiency for respectively manufacturing the sample vehicle for adjustment and evaluation according to each development scheme are high, and the safety of testing personnel is difficult to guarantee.
Disclosure of Invention
The invention aims to provide a battery safety control method and a simulation control device thereof, which can efficiently adjust and calibrate a vehicle and ensure driving safety.
In order to realize the purpose, the invention adopts the technical scheme that:
a battery safety control method, when the battery temperature in the power battery is in the range of the set threshold, the battery management unit outputs the normal signal of the battery work, the motor controller controls the motor work according to the instruction signal output by the vehicle control unit; when the temperature of the battery pack in the power battery exceeds a set threshold range, the battery management unit outputs a battery working abnormal signal, and the motor controller adjusts the input power of the motor on the basis of the instruction signal output by the vehicle control unit until the power battery recovers to a normal working state.
The method is used for adaptively adjusting the behavior of the vehicle according to the working state of the power battery, so that the safety of the battery is effectively ensured, and the driving safety of a user is ensured.
The battery analog control device comprises a power battery and a driving analog control unit, wherein a battery management unit is electrically connected with the power battery, acquires the working state of the power battery and converts the working state into a signal which can be identified by a motor controller, the driving analog control unit is electrically connected with a whole vehicle control unit, the whole vehicle control unit acquires the driving behavior of the driving analog control unit and converts the driving behavior into an instruction signal, the motor controller is electrically connected with the battery management unit, the whole vehicle control unit and a motor, and the motor controller controls the motor to generate driving or braking behavior according to the working state signal and the instruction signal of the power battery.
The device is adopted to simulate the driving behavior under different working conditions, so that the working performance and the state of the power battery can be quickly and effectively known, and a reliable basis is provided for optimizing a battery management strategy and improving the vehicle performance.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 and 2 are schematic views of the present invention.
In the figure: 10. the system comprises a power battery, 20 a battery management unit, 21 a temperature monitoring unit, 22 a current monitoring unit, 30 a motor controller, 40 a motor, 50 a vehicle control unit, 60 a driving simulation control unit, 70 a vehicle simulation unit, 80 a battery temperature adjusting controller and 90 a battery temperature adjusting unit.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
A battery safety control method, when the battery temperature in the power battery 10 is in the range of the set threshold, the battery management unit 20 outputs the normal signal of the battery work, the motor controller 30 controls the motor 40 to work according to the instruction signal outputted by the vehicle control unit 50; when the temperature of the battery pack in the power battery 10 exceeds the set threshold range, the battery management unit 20 outputs a battery operation abnormal signal, and the motor controller 30 adjusts the input power of the motor 40 based on the command signal output by the vehicle control unit 50. The temperature of the battery pack in the power battery 10 is used as a judgment standard, and the discharge current of the power battery 10 is adjusted by adjusting the input power of the motor 40, so that the safe operation of the power battery 10 is ensured.
When the input power of the motor 40 is adjusted, the input power of the motor 40 may be directly adjusted to a set value, or the input power may be gradually reduced on the basis of the current input power of the motor 40, and after the input power is reduced each time, the temperature change of the power battery 10 is monitored for a certain time period, and then the input power is judged to be maintained or the input power of the motor 40 is further reduced.
Specifically, when the temperature of the battery pack in the power battery 10 exceeds the set threshold range and the maximum discharge current of the power battery 10 is greater than the limit value, the motor controller 30 reduces the input power of the motor 40, and when the maximum discharge current of the power battery 10 is less than the limit value, the motor controller 30 maintains the input power. When the temperature of the battery pack in the power battery 10 exceeds the set threshold range and the maximum discharge current of the power battery 10 is less than or equal to the limit value, the motor controller 30 maintains the input power of the motor 40 or reduces the input power of the motor 40 to a set value, and the set value should be adjusted according to the result of the battery simulation control test.
The inherent properties of the power cell 10 include a low temperature limit, a high temperature limit, and a maximum discharge current limit. In this embodiment, the temperature value in the threshold range of the battery pack temperature of the power battery 10 includes, from low to high, a low temperature critical value, a low temperature working value, a high temperature working value, and a high temperature critical value, where the low temperature critical value is higher than the low temperature limiting value, and the high temperature critical value is lower than the high temperature limiting value. The limit value of the maximum discharge current of the power cell 10 is smaller than the limit value thereof.
The low temperature critical value, the high temperature critical value, the maximum discharge current limit value of the power battery 10 and the set value of the input power of the motor 40 should be adjusted and optimized according to the experiment.
Preferably, when the temperature of the battery pack in the power battery 10 exceeds a critical value, the input power of the motor 40 is adjusted to a set value; when the battery pack temperature in the power battery 10 is out of the working value range and within the critical value range, the input power of the motor 40 is adjusted in a gradually decreasing manner.
Since the operating efficiency of the power battery 10 is greatly affected by the temperature, when the battery pack temperature in the power battery 10 exceeds the set threshold range, the battery temperature adjustment controller 80 controls the battery temperature adjustment unit 90 to cool or heat to adjust the internal temperature of the power battery 10 until the temperature returns to the threshold range. When the temperature of the battery pack in the power battery 10 is within the set threshold range, the battery temperature adjustment controller 80 receives a command signal sent by the vehicle control unit 50, and controls the battery temperature adjustment unit 90 to maintain the working temperature of the power battery 10.
A battery simulation control device for optimizing the aforementioned battery safety control method includes a power battery 10 and a driving simulation control unit 60. The battery management unit 20 is electrically connected to the power battery 10, collects the operating state of the power battery 10, and converts the operating state into a signal recognizable by the motor controller 30. The driving simulation control unit 60 is electrically connected with the entire vehicle control unit 50, and the entire vehicle control unit 50 collects the driving behavior of the driving simulation control unit 60 and converts the driving behavior into an instruction signal. The motor controller 30 is electrically connected with the battery management unit 20, the vehicle control unit 50 and the motor 40, and the motor controller 30 controls the motor 40 to generate driving or braking action according to the working state signal and the instruction signal of the power battery 10.
By adopting the device to carry out the cyclic working condition test, the driving simulation control unit 60 simulates the driving behavior of a user, and the working state of the power battery under each working condition can be effectively identified according to the device, so that the performance of the vehicle can be reliably predicted and evaluated, and a reliable basis is provided for optimizing a battery management strategy and improving the performance of the vehicle.
In order to fully understand the operating state of the power battery 10 and ensure the battery safety, the battery management unit 20 includes a temperature monitoring unit 21 for monitoring the battery temperature in the power battery 10 and a current monitoring unit 22 for monitoring the discharge current of the power battery 10.
In order to further improve the power utilization efficiency of the power battery 10, a battery temperature adjusting unit 90 is arranged outside the power battery 10 or between the battery packs of the power battery 10, and the battery management unit 20 is combined to maintain the power battery 10 in a high-efficiency working state. The power battery 10 is connected with a battery temperature adjusting unit 90, the battery temperature adjusting controller 80 is electrically connected with the battery temperature adjusting unit 90, the battery management unit 20 and the vehicle control unit 50, and the battery temperature adjusting controller 80 controls the temperature adjusting action of the battery temperature adjusting unit 90 according to the working state signal of the power battery 10 fed back by the battery management unit 20.
The vehicle simulation unit 70 is connected to the motor 40 as a load, and the motor load provided by the vehicle simulation unit 70 includes the self weight of the vehicle, the load, and the running resistance. Therefore, when the device is used for a simulation control test, the obtained simulated running speed is more consistent with the actual running speed of the vehicle, and the evaluation on the vehicle performance is more accurate and reliable.
When the vehicle configuration is adjusted, the corresponding components and parameters in the device are adjusted, so that the performance of the power battery 10 and the vehicle can be quickly and accurately reevaluated, the development period is shortened, and the development cost is reduced.
When the simulation control device is used for testing, a tester firstly sets an initial range of the working temperature threshold of the power battery 10, a maximum discharge current limit value of the power battery 10 and an initial numerical value of an input power set value of the motor 40. And then respectively carrying out standard cycle working condition tests at different environmental temperatures, monitoring and recording the temperature and the discharge current of the power battery 10 to obtain a temperature and discharge current model of the power battery 10 under each working condition, and adjusting the set value according to the temperature and discharge current model.
Claims (6)
1. A battery safety control method is characterized in that:
when the temperature of a battery pack in the power battery (10) is within a set threshold range, the battery management unit (20) outputs a battery working normal signal, and the motor controller (30) controls the motor (40) to work according to an instruction signal output by the vehicle control unit (50);
when the temperature of a battery pack in the power battery (10) exceeds a set threshold range and the maximum discharge current of the power battery (10) is larger than a limit value, the motor controller (30) reduces the input power of the motor (40); when the maximum discharge current of the power battery (10) is less than or equal to the limit value, the motor controller (30) maintains the input power or reduces the input power of the motor (40) to a set value;
in the threshold value range of the battery pack temperature of the power battery (10), the temperature values comprise a low-temperature critical value, a low-temperature working value, a high-temperature working value and a high-temperature critical value from low to high, and when the battery pack temperature in the power battery (10) exceeds the critical value, the input power of the motor (40) is adjusted to be a set value; when the temperature of the battery pack in the power battery (10) exceeds the working value range and is within the critical value range, the input power of the motor (40) is adjusted in a gradual reduction mode, namely after the input power is reduced each time, the temperature change of the power battery (10) is monitored for a certain time, and then the input power is judged to be maintained or the input power of the motor (40) is further reduced.
2. The battery safety control method according to claim 1, characterized in that: when the temperature of the battery pack in the power battery (10) exceeds a set threshold range, the battery temperature adjusting controller (80) controls the battery temperature adjusting unit (90) to refrigerate or heat so as to adjust the internal temperature of the power battery (10) until the temperature is restored to be within the threshold range;
when the temperature of the battery pack in the power battery (10) is within a set threshold range, the battery temperature adjusting controller (80) receives a command signal sent by the vehicle control unit (50) and controls the battery temperature adjusting unit (90) to maintain the power battery (10) at the working temperature.
3. A simulation control device of a battery for optimizing the battery safety control method of claim 2, characterized in that: comprises a power battery (10) and a driving simulation control unit (60),
the battery management unit (20) is electrically connected with the power battery (10), collects the working state of the power battery (10) and converts the working state into a signal which can be recognized by the motor controller (30),
the driving simulation control unit (60) is electrically connected with the whole vehicle control unit (50), the whole vehicle control unit (50) collects the driving behavior of the driving simulation control unit (60) and converts the driving behavior into an instruction signal,
the motor controller (30) is electrically connected with the battery management unit (20), the whole vehicle control unit (50) and the motor (40), and the motor controller (30) controls the motor (40) to generate driving or braking action according to the working state signal and the instruction signal of the power battery (10).
4. The analog control device of the battery according to claim 3, characterized in that: the battery management unit (20) comprises a temperature monitoring unit (21) for monitoring the temperature of the battery pack in the power battery (10); the battery management unit (20) comprises a current monitoring unit (22) for monitoring the discharge current of the power battery (10).
5. The analog control device of the battery according to claim 4, characterized in that: the power battery (10) is connected with a battery temperature adjusting unit (90), the battery temperature adjusting controller (80) is electrically connected with the battery temperature adjusting unit (90), the battery management unit (20) and the whole vehicle control unit (50), and the battery temperature adjusting controller (80) controls the temperature adjusting action of the battery temperature adjusting unit (90) according to the working state signal of the power battery (10) fed back by the battery management unit (20).
6. The analog control device of a battery according to claim 5, characterized in that: the automobile simulation unit (70) is used as a load to be connected with the motor (40), and the motor load provided by the automobile simulation unit (70) comprises the self weight of the automobile, the load and the running resistance.
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| CN202010757093.8A CN111845447B (en) | 2020-07-31 | 2020-07-31 | Battery safety control method and analog control device thereof |
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| CN202010757093.8A CN111845447B (en) | 2020-07-31 | 2020-07-31 | Battery safety control method and analog control device thereof |
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| CN111845447B true CN111845447B (en) | 2021-12-07 |
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| CN108879617A (en) * | 2017-12-26 | 2018-11-23 | 深圳市仕威新能源有限公司 | Electric motor intelligent control method, device, dynamical system and electric car |
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| US10408880B2 (en) * | 2014-08-19 | 2019-09-10 | Fca Us Llc | Techniques for robust battery state estimation |
| CN107499180B (en) * | 2017-08-04 | 2020-05-29 | 安徽江淮汽车集团股份有限公司 | Pure electric vehicle power control method and system |
| JP6656284B2 (en) * | 2018-03-22 | 2020-03-04 | 本田技研工業株式会社 | Vehicle battery temperature display |
| CN110843530B (en) * | 2019-10-23 | 2021-05-04 | 江苏聚磁电驱动科技有限公司 | Multi-module intelligent driving system of large and medium power electric vehicle and large and medium power electric vehicle thereof |
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- 2020-07-31 CN CN202010757093.8A patent/CN111845447B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| CN105891631A (en) * | 2016-04-03 | 2016-08-24 | 北京工业大学 | Electric vehicle three-system integrated test platform |
| CN106274498A (en) * | 2016-08-30 | 2017-01-04 | 奇瑞商用车（安徽）有限公司 | The control method of cell management system of electric automobile |
| CN108879617A (en) * | 2017-12-26 | 2018-11-23 | 深圳市仕威新能源有限公司 | Electric motor intelligent control method, device, dynamical system and electric car |
| CN108445403A (en) * | 2018-03-05 | 2018-08-24 | 东莞中山大学研究院 | Battery and battery management system test method and system |
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