CN110803023A - Control method and system for electric vehicle collision protection - Google Patents
Control method and system for electric vehicle collision protection Download PDFInfo
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- CN110803023A CN110803023A CN201810799510.8A CN201810799510A CN110803023A CN 110803023 A CN110803023 A CN 110803023A CN 201810799510 A CN201810799510 A CN 201810799510A CN 110803023 A CN110803023 A CN 110803023A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000001276 controlling effect Effects 0.000 description 7
- 230000001133 acceleration Effects 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the technical field of vehicle protection, in particular to a control method and a system for electric vehicle collision protection. The system comprises a signal processing module and a vehicle speed detection module, wherein the input end of the signal processing module is connected with the vehicle speed detection module; when the high-voltage power-down is required to be controlled after the vehicle collides, the signal processing module judges that the high-voltage power-down of the driving motor is only controlled until the vehicle speed is less than the set speed value when the current vehicle speed value is greater than the set vehicle speed value according to the current vehicle speed value, and controls the whole vehicle high-voltage power-down when the vehicle speed is less than the set speed value, so that the protection control after the electric vehicle collides is realized, and the problem that the vehicle is out of control due to the fact that the vehicle steering and braking system fails because the existing electric vehicle is still in high-speed running after colliding and the high-voltage power-.
Description
Technical Field
The invention relates to the technical field of vehicle protection, in particular to a control method and a system for electric vehicle collision protection.
Background
Nowadays, environmental pollution, energy crisis and other factors push the high-speed development of the electric automobile industry, and especially, new energy passenger cars used in the public transportation field show explosive growth. Compared with other electric automobiles, the passenger car has more passengers, complex use environment, more strict requirements on safety and easy occurrence of collision accidents. The particularity of the electric motor coach in the collision is represented in two aspects: firstly, the high-energy and large-mass power battery system and the high-voltage accessories thereof are extruded and damaged between the high-energy and large-mass power battery system and a vehicle body in collision, which may cause fire, explosion and the like caused by short circuit of a high-voltage loop; and secondly, potential falling is caused after the high-voltage driving system is collided, the instantaneous insulation performance is rapidly reduced, and the high-voltage driving system may be in direct or indirect contact with passengers or rescuers to cause electric shock injury.
The collision safety of the electric motor coach needs to be started from two aspects: firstly, a reasonable mechanical structure needs to be fully considered in vehicle design to meet the protection requirements of drivers and passengers and the protection requirements of a vehicle body structure, such as special high-pressure cabin design, anti-collision structure design and the like; secondly, collision occurs under an uncontrollable condition, and basic requirements on electrical safety are met by designing a set of reliable and safe collision protection and vehicle control method. There is a patent document CN104276043B in chinese patent publication, which discloses a vehicle collision protection system, including an acceleration sensing unit and an embedded processing unit, where the embedded processing unit is connected to the acceleration sensing unit, the acceleration sensing unit is used to detect the acceleration of the vehicle and send a collision protection signal to the embedded processing unit when the acceleration of the vehicle is greater than or equal to a preset acceleration protection threshold, and the embedded processing unit is used to control the output and/or input of high-voltage power of the cut-off system when receiving the collision signal, so as to avoid the vehicle from being threatened by the high-voltage power after a collision fault occurs, thereby being able to ensure personal safety.
However, such a collision protection system does not conform to the actual use of the vehicle, and there is no countermeasure for making the vehicle respond differently according to the actual collision situation, and if the high-voltage power supply is cut off when the vehicle speed is high, there is a high possibility that an unresponsive phenomenon such as steering and braking occurs, which affects the vehicle running safety.
Disclosure of Invention
The invention aims to provide a control method and a control system for electric vehicle collision protection, which are used for solving the problem that the vehicle is out of control due to the fact that a vehicle steering and braking system fails because the existing electric vehicle is still in high-speed running after collision and directly controls high-voltage power supply.
In order to realize the protection control after the electric vehicle collides, the problem that the vehicle is out of control due to the failure of a vehicle steering and braking system caused by the fact that the existing electric vehicle is still in high-speed running after the collision and directly controls high-voltage power down is solved. The invention provides a control method for collision protection of an electric vehicle, which comprises the following steps:
1) when the voltage of the high voltage needs to be controlled after the vehicle is collided, the current vehicle speed value is obtained;
2) and judging whether the current vehicle speed value is greater than a set vehicle speed value, if so, controlling the high-voltage low-voltage of the driving motor only until the vehicle speed is less than the set speed value, and controlling the whole vehicle high-voltage low-voltage when the vehicle speed is less than the set speed value.
Further, in order to accurately control the high-voltage power-off condition after the vehicle collision, vehicle collision information is obtained after the vehicle collision, and whether the collision force value is not less than the upper limit threshold value or not is judged according to the vehicle collision information and the obtained collision force value; and if so, controlling the high voltage to be powered down.
Further, in order to ensure that the vehicle can normally run when the collision is not serious, if the collision force value is smaller than the upper limit threshold value, whether the collision force value is larger than the lower limit threshold value is also judged; and if the impact force value is smaller than the upper limit threshold value and larger than the lower limit threshold value, reducing the power of the driving motor according to a set proportion.
Further, in order to prevent an alarm due to false alarm, if the collision force value is smaller than the lower threshold, false alarm information is output.
The invention provides a control system for collision protection of an electric vehicle, which comprises a signal processing module and a vehicle speed detection module, wherein the input end of the signal processing module is connected with the vehicle speed detection module; when the high-voltage power-down is required to be controlled after the vehicle collides, the signal processing module judges that the high-voltage power-down of the driving motor is only controlled until the vehicle speed is less than a set speed value when the current vehicle speed value is greater than the set vehicle speed value according to the current vehicle speed value, and controls the whole high-voltage power-down of the whole vehicle when the vehicle speed is less than the set speed value.
Furthermore, in order to accurately control the high-voltage power-off condition after the vehicle collides, the vehicle collision monitoring system further comprises a collision detection module for detecting vehicle body collision information, wherein the input end of the signal processing module is connected with the collision detection module so as to obtain a collision information analysis and obtain a collision force value; and judging whether the impact force value is not less than an upper limit threshold value according to the impact force value, and controlling high-voltage electrification.
Further, in order to ensure that the vehicle can normally run when the collision is not serious, if the collision force value is smaller than the upper limit threshold value, whether the collision force value is larger than the lower limit threshold value is also judged; and if the impact force value is smaller than the upper limit threshold value and larger than the lower limit threshold value, reducing the power of the driving motor according to a set proportion.
Further, in order to prevent the alarm caused by the false alarm of the vehicle collision, if the collision force value is smaller than the lower limit threshold value, the false alarm information is output.
Drawings
Fig. 1 is a flowchart of a control method of collision protection of an electric vehicle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a control system for collision protection of an electric vehicle, which comprises a signal processing module and a vehicle speed detection module; the vehicle speed detection module can be an existing vehicle speed acquisition unit of the vehicle, and can also be an additionally arranged vehicle speed acquisition unit, and the vehicle speed detection module preferably acquires the existing vehicle speed in the vehicle; the output end of the signal processing module can be directly connected with the vehicle speed detection module, and can also be connected with the vehicle speed detection module through a vehicle control unit. The system executes a control method for collision protection of an electric vehicle, as shown in fig. 1, including the steps of:
1) and when the voltage under the high voltage needs to be controlled after the vehicle is collided, acquiring the current vehicle speed value.
2) And judging whether the current vehicle speed value is greater than a set vehicle speed value, if so, controlling the high-voltage low-voltage of the driving motor only until the vehicle speed is less than the set speed value, and controlling the whole vehicle high-voltage low-voltage when the vehicle speed is less than the set speed value.
The signal processing module CAN be a part of the vehicle controller and CAN also exist independently of the vehicle controller, and the vehicle controller is connected with corresponding action mechanisms such as a motor controller and a battery management system through CAN communication and CAN control the on-off of a driving motor and a circuit.
Specifically, if the set speed value is 3Km/h, ① controls the motor control unit to execute high-voltage power reduction of the driving motor when the vehicle speed is greater than 3Km/h, the output power of the driving motor is 0, because the vehicle speed is fast at this time, only the high-voltage power reduction of the driving motor is performed, the output power is 0, normal high-voltage power supply of operation parts such as a steering system and a braking system of the whole vehicle is maintained, the whole vehicle is prevented from being out of control, until the vehicle speed is reduced to be less than or equal to 3Km/h, the whole vehicle controller controls the battery management system to execute the operation of disconnecting the high-voltage main loop relay of the power battery, the whole vehicle is powered down, the vehicle stops, and a professional person waits for overhaul in situ.
The system also comprises a collision detection module for detecting the collision information of the vehicle body, wherein the input end of the signal processing module is connected with the collision detection module so as to obtain a collision information and analyze the collision information to obtain a collision force value; the condition for controlling the high-voltage electrification after the vehicle collision is obtained according to the magnitude relation between the impact force value and the set value, and when the impact force value is not less than the upper limit threshold value, the high-voltage electrification is controlled. When the collision force value is smaller than the upper limit threshold value, whether the collision force value is larger than the lower limit threshold value is also judged; and if the impact force value is smaller than the upper limit threshold value and larger than the lower limit threshold value, reducing the power of the driving motor according to a set proportion. And outputting false alarm information when the collision force value is smaller than the lower limit threshold value.
The collision information acquisition, collision information analysis and judgment logic are carried out in a signal processing module which is an integrated electronic circuit and has the functions of signal adjustment, signal conversion, collision force analysis, strategy execution, expansion and upgrading and the like, the collision detection module comprises an electronic sensor and/or an impact force sensor, the signal processing module works according to the following continuous process after receiving signals of the sensor, ① signal adjustment is carried out, the received signals are amplified and filtered to generate disordered and interfered signals, ② signal conversion is carried out, the adjusted analog signals are converted into digital signals, ③ impact force values are obtained, the digital signals are input into a force value analysis program (built-in software) to obtain a force value (F) of a vehicle impacted, ④ strategy execution is carried out, the obtained impact force value is compared with different set impact grade classification threshold values, the system triggers different graded execution strategies, when the A is a serious impact threshold value, namely an upper limit threshold value is carried out, the ④ strategy execution is carried out, the obtained impact force value is compared with the set different impact grade classification threshold values, and the system triggers the execution strategies when the A is not less than the lower limit, the lower limit is carried out, the collision strategy is a lower limit is not less than the lower limit, and the wrong impact strategy is reported when the A is not less than the lower limit, namely the collision strategy, and the.
The corresponding serious collision strategy is to directly control the high-voltage power-down through the vehicle controller, the slight collision strategy is to reduce the power of a driving motor according to a set proportion through the vehicle controller, and the false alarm strategy is to output false alarm information through the vehicle controller and not to perform collision treatment.
The present invention has been described in relation to particular embodiments thereof, but the invention is not limited to the described embodiments. In the thought given by the present invention, the technical means in the above embodiments are changed, replaced, modified in a manner that is easily imaginable to those skilled in the art, and the functions are basically the same as the corresponding technical means in the present invention, and the purpose of the invention is basically the same, so that the technical scheme formed by fine tuning the above embodiments still falls into the protection scope of the present invention.
Claims (8)
1. A control method of electric vehicle collision protection, characterized by comprising the steps of:
1) when the voltage of the high voltage needs to be controlled after the vehicle is collided, the current vehicle speed value is obtained;
2) and judging whether the current vehicle speed value is greater than a set vehicle speed value, if so, controlling the high-voltage low-voltage of the driving motor only until the vehicle speed is less than the set speed value, and controlling the whole vehicle high-voltage low-voltage when the vehicle speed is less than the set speed value.
2. The control method of electric vehicle collision protection according to claim 1, wherein vehicle collision information is obtained after the vehicle collision, and whether the impact force value is not less than the upper threshold is judged according to the vehicle collision information and the impact force value; and if so, controlling the high voltage to be powered down.
3. The control method of electric vehicle collision protection according to claim 1 or 2, characterized in that, if the collision force value is smaller than the upper threshold, it is also determined whether the impact force value is larger than the lower threshold; and if the impact force value is smaller than the upper limit threshold value and larger than the lower limit threshold value, reducing the power of the driving motor according to a set proportion.
4. The control method of electric vehicle collision protection according to claim 3, characterized in that if the collision force value is less than the lower threshold, a false alarm message is output.
5. The control system for collision protection of the electric vehicle is characterized by comprising a signal processing module and a vehicle speed detection module, wherein the input end of the signal processing module is connected with the vehicle speed detection module; when the high-voltage power-down is required to be controlled after the vehicle collides, the signal processing module judges that the high-voltage power-down of the driving motor is only controlled until the vehicle speed is less than a set speed value when the current vehicle speed value is greater than the set vehicle speed value according to the current vehicle speed value, and controls the whole high-voltage power-down of the whole vehicle when the vehicle speed is less than the set speed value.
6. The control system for electric vehicle collision protection according to claim 5, further comprising a collision detection module for detecting vehicle body collision information, wherein the input end of the signal processing module is connected with the collision detection module to obtain a collision information analysis result and obtain a collision force value; and judging whether the impact force value is not less than an upper limit threshold value according to the impact force value, and controlling high-voltage electrification.
7. The electric vehicle collision protection control system according to claim 5 or 6, characterized in that if the collision force value is smaller than the upper threshold, it is also determined whether the impact force value is larger than the lower threshold; and if the impact force value is smaller than the upper limit threshold value and larger than the lower limit threshold value, reducing the power of the driving motor according to a set proportion.
8. The electric vehicle collision protection control system according to claim 7, wherein if the collision force value is less than the lower threshold, a false alarm message is output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810799510.8A CN110803023A (en) | 2018-07-19 | 2018-07-19 | Control method and system for electric vehicle collision protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810799510.8A CN110803023A (en) | 2018-07-19 | 2018-07-19 | Control method and system for electric vehicle collision protection |
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| CN110803023A true CN110803023A (en) | 2020-02-18 |
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| CN201810799510.8A Pending CN110803023A (en) | 2018-07-19 | 2018-07-19 | Control method and system for electric vehicle collision protection |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111252080A (en) * | 2020-03-03 | 2020-06-09 | 上海中科深江电动车辆有限公司 | Method for realizing unexpected power-off protection processing of high-speed running of vehicle |
| CN111546894A (en) * | 2020-05-21 | 2020-08-18 | 新石器慧通（北京）科技有限公司 | Vehicle abnormal power-off control method and system and vehicle |
| CN111968444A (en) * | 2020-08-31 | 2020-11-20 | 行云新能科技（深圳）有限公司 | Intelligent training platform for high-voltage safe operation |
| CN113370842A (en) * | 2021-06-30 | 2021-09-10 | 湖北东瀚空港设备科技有限公司 | Battery output power control method in electric vehicle safety anti-collision system |
| CN113386743A (en) * | 2021-07-12 | 2021-09-14 | 无锡太机脑智能科技有限公司 | Detection and processing method for speed runaway of unmanned small special vehicle |
| CN113608049A (en) * | 2021-08-05 | 2021-11-05 | 驭势科技（北京）有限公司 | Collision failure detection system, collision failure detection device and electronic device |
| CN113602262A (en) * | 2021-08-09 | 2021-11-05 | 郑州睿行汽车科技有限公司 | Vehicle collision protection system and method |
| CN114771259A (en) * | 2022-03-24 | 2022-07-22 | 厦门金龙联合汽车工业有限公司 | New energy vehicle collision detection and protection control method |
| CN115158024A (en) * | 2022-07-26 | 2022-10-11 | 广汽埃安新能源汽车有限公司 | A method and device for de-energizing a vehicle in a collision |
| CN115520012A (en) * | 2021-06-24 | 2022-12-27 | 宇通客车股份有限公司 | A hydrogen fuel cell vehicle collision detection method, system and vehicle |
| CN115757628A (en) * | 2022-11-22 | 2023-03-07 | 深圳广联数科科技有限公司 | Vehicle collision detection method, device, equipment and medium |
| CN115923586A (en) * | 2021-09-28 | 2023-04-07 | 宇通客车股份有限公司 | Over-current protection method for battery system and vehicle |
| CN116720356A (en) * | 2023-06-08 | 2023-09-08 | 中国汽车工程研究院股份有限公司 | Design method of vehicle active safety module based on cyclist accident injury prediction |
| CN116766937A (en) * | 2023-06-02 | 2023-09-19 | 宇通客车股份有限公司 | New energy vehicle current abnormality protection control method and high-voltage loop |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111252080A (en) * | 2020-03-03 | 2020-06-09 | 上海中科深江电动车辆有限公司 | Method for realizing unexpected power-off protection processing of high-speed running of vehicle |
| CN111546894A (en) * | 2020-05-21 | 2020-08-18 | 新石器慧通（北京）科技有限公司 | Vehicle abnormal power-off control method and system and vehicle |
| CN111968444A (en) * | 2020-08-31 | 2020-11-20 | 行云新能科技（深圳）有限公司 | Intelligent training platform for high-voltage safe operation |
| CN115520012B (en) * | 2021-06-24 | 2025-09-30 | 宇通客车股份有限公司 | A hydrogen fuel cell vehicle collision detection method, system and vehicle |
| CN115520012A (en) * | 2021-06-24 | 2022-12-27 | 宇通客车股份有限公司 | A hydrogen fuel cell vehicle collision detection method, system and vehicle |
| CN113370842A (en) * | 2021-06-30 | 2021-09-10 | 湖北东瀚空港设备科技有限公司 | Battery output power control method in electric vehicle safety anti-collision system |
| CN113386743A (en) * | 2021-07-12 | 2021-09-14 | 无锡太机脑智能科技有限公司 | Detection and processing method for speed runaway of unmanned small special vehicle |
| CN113608049A (en) * | 2021-08-05 | 2021-11-05 | 驭势科技（北京）有限公司 | Collision failure detection system, collision failure detection device and electronic device |
| CN113608049B (en) * | 2021-08-05 | 2023-12-01 | 驭势科技（北京）有限公司 | Collision failure detection system, collision failure detection device, and electronic device |
| CN113602262A (en) * | 2021-08-09 | 2021-11-05 | 郑州睿行汽车科技有限公司 | Vehicle collision protection system and method |
| CN113602262B (en) * | 2021-08-09 | 2023-01-31 | 郑州睿行汽车科技有限公司 | System and method for protecting a vehicle after a collision |
| CN115923586A (en) * | 2021-09-28 | 2023-04-07 | 宇通客车股份有限公司 | Over-current protection method for battery system and vehicle |
| CN114771259B (en) * | 2022-03-24 | 2025-06-10 | 厦门金龙联合汽车工业有限公司 | New energy vehicle collision detection and protection control method |
| CN114771259A (en) * | 2022-03-24 | 2022-07-22 | 厦门金龙联合汽车工业有限公司 | New energy vehicle collision detection and protection control method |
| CN115158024A (en) * | 2022-07-26 | 2022-10-11 | 广汽埃安新能源汽车有限公司 | A method and device for de-energizing a vehicle in a collision |
| CN115757628A (en) * | 2022-11-22 | 2023-03-07 | 深圳广联数科科技有限公司 | Vehicle collision detection method, device, equipment and medium |
| CN116766937A (en) * | 2023-06-02 | 2023-09-19 | 宇通客车股份有限公司 | New energy vehicle current abnormality protection control method and high-voltage loop |
| CN116720356A (en) * | 2023-06-08 | 2023-09-08 | 中国汽车工程研究院股份有限公司 | Design method of vehicle active safety module based on cyclist accident injury prediction |
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Application publication date: 20200218 |
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| RJ01 | Rejection of invention patent application after publication |