CN104057828A - Collision protection system and protection method thereof for high-voltage safety of electric/hybrid electric automobile - Google Patents
Collision protection system and protection method thereof for high-voltage safety of electric/hybrid electric automobile Download PDFInfo
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- CN104057828A CN104057828A CN201410274977.2A CN201410274977A CN104057828A CN 104057828 A CN104057828 A CN 104057828A CN 201410274977 A CN201410274977 A CN 201410274977A CN 104057828 A CN104057828 A CN 104057828A
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- 210000004712 air sac Anatomy 0.000 claims description 22
- 230000001133 acceleration Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The invention provides a collision protection system and a protection method thereof for the high-voltage safety of an electric/hybrid electric automobile. The collision protection system comprises a collision transducer group for detecting collision in multiple directions, a safety air bag controller, a whole-automobile controller for disconnecting a high-voltage battery relay, and an automobile body controller for unlocking a door lock, wherein the collision transducer group is connected with the safety air bag controller; a signal output end of the safety air bag controller is connected with the whole-automobile controller and the automobile body controller respectively. As the collision transducer group can induce the collision in multiple directions, the collision protection system is higher in safety in comparison with a traditional single collision switch; collision information is transmitted to the whole-automobile controller through the safety air bag controller, and the safety level can be improved through software/hardware design redundancies; the collision information is also transmitted to the automobile body controller through the safety air bag controller, and the door lock is timely unlocked to practically protect the personal safety of a driver.
Description
Technical field
The present invention relates to new-energy automobile safety system technical field, be specifically related to a kind of collision protection system and guard method thereof of electric/hybrid automobile high-voltage safety.
Background technology
Along with becoming increasingly conspicuous of the development of modern high technology and world today's environment, the energy two hang-ups, new-energy automobile (battery-driven car and hybrid vehicle) is with superior environmental protection characteristic, become the emphasis that auto trade is paid close attention to, but the high-tension battery voltage that new-energy automobile carries all can surpass safety voltage 60V, conventionally between 300V-400V.These high voltage devices and high tension loop, after collision, occur that failure of insulation will electric shock occupant, more seriously can there is high voltage short circuit and cause vehicle burning or blast, so the device of cut off high subsystem circuit in must equipment collision on new-energy automobile.Collision safety scheme at present a lot of new-energy automobiles is to increase an impact switch at vehicle body, this impact switch is connected between entire car controller and battery management system, when collision happens, switch disconnects, BMS enables relay and disconnects, guarantee car load high-voltage safety, but this scheme there are three shortcomings: 1: switchtype misoperation backward in technique, easy and can only detect a direction collision; 2: switch inside does not have integrated control chip, can not meet software and hardware Redundancy Design, the safe class of out of reach ASIL C; 3: increase cost.
Summary of the invention
The object of the invention is to propose a kind of collision protection system of electric/hybrid automobile high-voltage safety; can be when automobile runs into the collision of any direction; disconnect high-tension battery relay and open car door, preventing that high tension loop short circuit from causing vehicle burning or blast, the personal safety of protection chaufeur.
The collision protection system of electric/hybrid automobile high-voltage safety of the present invention; key is to comprise crash sensor group for multi-aspect collision detection, safety air sac controller, for the entire car controller of cut off high battery relay with for opening the car body controller of door lock; described crash sensor group is connected with safety air sac controller, and the signal output part of described safety air sac controller is connected with car body controller with entire car controller respectively.
The collision protection system of electric/hybrid automobile high-voltage safety of the present invention, can respond to multidirectional collision by crash sensor group, compares traditional single impact switch and has greater security; Collision information also transfers to entire car controller by safety air sac controller, can pass through design of hardware and software redundancy, improves safe class; Collision information also transfers to entire car controller and car body controller by safety air sac controller, opens in time door lock, conscientiously protects chaufeur personal safety.
Further, the signal output part of described safety air sac controller comprises hardware signal mouth and CAN signal output part.Convert collision output to software and hardware output, meet Safety Redundancy design.
Specifically, described positive bump sensor is central acceleration pick-up, and described side impact sensor is the outer side acceleration sensor of driving compartment, and described rear bump sensor is passenger accommodation acceleration pick-up, be responsible for respectively the collision at induction vehicle body front side, both sides and rear portion, tightening security property.
Specifically, described hardware output end signal is electric impulse signal.
Another object of the present invention is to provide a kind of interference preventing method of electric/hybrid automobile high-voltage safety, comprises the following steps:
A, crash sensor group detect multidirectional collision, as bump, and this signal is sent to safety air sac controller;
B, safety air sac controller pass through ignition circuit firing air bag module after receiving collision alarm, collision alarm are sent to respectively to entire car controller and car body controller simultaneously;
C, entire car controller disconnect high-voltage relay after receiving collision alarm, and car body controller is opened door lock after receiving collision alarm.
Wherein, described collision alarm comprises hardware signal and CAN signal.Before C step, also comprise checking procedure: entire car controller/car body controller is diagnosed with collision information hardware signal CAN signal,, while only having both to mate, just carry out C step.Collision alarm of the present invention comprises hardware signal and CAN signal; by both, compare and just confirm that automobile bumps, to carry out C step, disconnect high-voltage relay and open door lock, prevent that hardware signal from the faults such as short ground occurring; produce maloperation, conscientiously protect the personal safety of chaufeur.
Accompanying drawing explanation
Fig. 1 is crash sensor group distributing position schematic diagram of the present invention.
Fig. 2 is crash protection scheme system diagram of the present invention.
Fig. 3 is the collision alarm sequential chart of safety air sac controller output of the present invention.
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail as the effect of the mutual alignment between the shape of each related member, structure, each several part and annexation, each several part and principle of work etc.
Embodiment 1:
The collision protection system of electric/hybrid automobile high-voltage safety of the present invention; comprise crash sensor group for multi-aspect collision detection, safety air sac controller, for the entire car controller of cut off high battery relay with for opening the car body controller of door lock; crash sensor group is connected with safety air sac controller, and the signal output part of safety air sac controller is connected with car body controller with entire car controller respectively.The signal output part of safety air sac controller comprises hardware signal mouth and CAN signal output part, as shown in Figure 2.Like this collision alarm is transmitted by hardware and software signal two-way, the short earth fault while preventing simple hardware circuit signal transmission in the past, makes entire car controller maloperation, conscientiously protects driver safety.Crash sensor group comprises that positive bump sensor is central acceleration pick-up 1, and side impact sensor is the outer side acceleration sensor 2 of driving compartment, and rear bump sensor is passenger accommodation acceleration pick-up 3, to realize omnibearing detection auto against signal.Sensor group's position distribution is as Fig. 1.
The control principle of safety air sac controller, entire car controller and car body controller is: the vehicle beginning that powers on, there is the low level time delay Ts output of 500 milliseconds, during safety air bag normal operation, output PWM waveform, the high level Th of 300 milliseconds and the low level Tl of 20 milliseconds; While bumping, export the low level pulse To of 200 milliseconds, entire car controller receives after the low level of 30 milliseconds, and judgement collision occurs, outputting cutting broken height potential relay, and car body controller judgement collision occurs, and opens door lock.If safety air bag et out of order or collision output signal disconnect, the hardware signal that entire car controller detects is continuously high level, entire car controller just can diagnose out this hardware signal to occur fault, if there is short earth fault in this signal, and safety air bag transmission CAN message informs that entire car controller does not bump, entire car controller just can be judged and collide the fault that short ground has appearred in the hardware signal of exporting, thereby send correct instruction, light not under command light, alerting drivers goes the maintenance of 4S shop simultaneously.Such crash response time be enough to meet vehicle from collision start to the failsafety time be probably the time requirement of 120 milliseconds.
The interference preventing method of electric/hybrid automobile high-voltage safety of the present invention, comprises the following steps:
A, crash sensor group detect multidirectional collision, as bump, and this signal is sent to safety air sac controller;
B, safety air sac controller pass through ignition circuit firing air bag module after receiving collision alarm, collision alarm are sent to respectively to entire car controller and car body controller simultaneously;
C, entire car controller disconnect high-voltage relay after receiving collision alarm, and car body controller is opened door lock after receiving collision alarm.
Wherein, described collision alarm comprises hardware signal and CAN signal.Before C step, also comprise checking procedure: entire car controller/car body controller is diagnosed collision information CAN signal and hardware signal, while only having both to mate, just carry out C step.Collision alarm of the present invention comprises hardware signal and CAN signal; by both, compare and just confirm that automobile bumps, to carry out C step, disconnect high-voltage relay and open door lock, prevent that hardware signal from the faults such as short ground occurring; produce maloperation, conscientiously protect the personal safety of chaufeur.
Claims (8)
1. the collision protection system of an electric/hybrid automobile high-voltage safety; it is characterized in that comprising crash sensor group for multi-aspect collision detection, safety air sac controller, for the entire car controller of cut off high battery relay with for opening the car body controller of door lock; described crash sensor group is connected with safety air sac controller, and the signal output part of described safety air sac controller is connected with car body controller with entire car controller respectively.
2. the collision protection system of electric/hybrid automobile high-voltage safety according to claim 1, is characterized in that the signal output part of described safety air sac controller comprises hardware signal mouth and CAN signal output part.
3. the collision protection system of electric/hybrid automobile high-voltage safety according to claim 1, is characterized in that described crash sensor group comprises positive bump sensor, side impact sensor and rear bump sensor.
4. according to the collision protection system of the electric/hybrid automobile high-voltage safety described in power 3; it is characterized in that described positive bump sensor is central acceleration pick-up; described side impact sensor is the outer side acceleration sensor of driving compartment, and described rear bump sensor is passenger accommodation acceleration pick-up.
5. according to profit, require the collision protection system of the electric/hybrid automobile high-voltage safety described in 2 or 3 or 4, it is characterized in that described hardware output end signal is electric impulse signal.
6. an interference preventing method for electric/hybrid automobile high-voltage safety, is characterized in that comprising the following steps:
Crash sensor group detects multidirectional collision, as bumps, and this signal is sent to safety air sac controller;
Safety air sac controller passes through ignition circuit firing air bag module after receiving collision alarm, collision alarm is sent to respectively to entire car controller and car body controller simultaneously;
Entire car controller disconnects high-voltage relay after receiving collision alarm, and car body controller is opened door lock after receiving collision alarm.
7. the interference preventing method of electric/hybrid automobile high-voltage safety according to claim 6, is characterized in that described collision alarm comprises hardware signal and CAN signal.
8. the interference preventing method of electric/hybrid automobile high-voltage safety according to claim 6; it is characterized in that also comprising checking procedure before described C step: entire car controller/car body controller is compared collision information CAN signal and hardware signal; while only having both to mate, just carry out C step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410274977.2A CN104057828A (en) | 2014-06-19 | 2014-06-19 | Collision protection system and protection method thereof for high-voltage safety of electric/hybrid electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410274977.2A CN104057828A (en) | 2014-06-19 | 2014-06-19 | Collision protection system and protection method thereof for high-voltage safety of electric/hybrid electric automobile |
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| CN201410274977.2A Pending CN104057828A (en) | 2014-06-19 | 2014-06-19 | Collision protection system and protection method thereof for high-voltage safety of electric/hybrid electric automobile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107662502A (en) * | 2017-08-30 | 2018-02-06 | 简式国际汽车设计（北京）有限公司 | A kind of electric automobile collision protects system and method |
| CN111391779A (en) * | 2018-12-15 | 2020-07-10 | 阿尔特汽车技术股份有限公司 | Electric automobile safety airbag control method based on two CAN buses |
| CN111413946A (en) * | 2020-03-23 | 2020-07-14 | 奇瑞新能源汽车股份有限公司 | New energy automobile driving motor controller fault clearing control method and structure |
| CN111845343A (en) * | 2020-06-29 | 2020-10-30 | 江铃汽车股份有限公司 | Fuel oil cutting method and device, engine control module and system |
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| CN103448555A (en) * | 2013-06-24 | 2013-12-18 | 浙江吉利汽车研究院有限公司杭州分公司 | Electric car charging collision control method and system |
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2014
- 2014-06-19 CN CN201410274977.2A patent/CN104057828A/en active Pending
Patent Citations (6)
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| WO2006022061A1 (en) * | 2004-08-27 | 2006-03-02 | Toyota Jidosha Kabushiki Kaisha | Motor vehicle capable of preventing malfunction and interrupting high-voltage system when accident occurs |
| CN102052014A (en) * | 2009-11-09 | 2011-05-11 | 联创汽车电子有限公司 | Vehicle door control system |
| CN202480896U (en) * | 2012-01-13 | 2012-10-10 | 浙江吉利汽车研究院有限公司 | Safety redundancy device for automobile power battery system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107662502A (en) * | 2017-08-30 | 2018-02-06 | 简式国际汽车设计（北京）有限公司 | A kind of electric automobile collision protects system and method |
| CN111391779A (en) * | 2018-12-15 | 2020-07-10 | 阿尔特汽车技术股份有限公司 | Electric automobile safety airbag control method based on two CAN buses |
| CN111413946A (en) * | 2020-03-23 | 2020-07-14 | 奇瑞新能源汽车股份有限公司 | New energy automobile driving motor controller fault clearing control method and structure |
| CN111845343A (en) * | 2020-06-29 | 2020-10-30 | 江铃汽车股份有限公司 | Fuel oil cutting method and device, engine control module and system |
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Owner name: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SAIC CHERY AUTOMOBILE CO., LTD. Effective date: 20150728 |
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Effective date of registration: 20150728 Address after: 241000 Yijiang, Anhui Province, Jin Hua Road, No. 226, South Road, No. Applicant after: New-energy automobile Technology Co., Ltd. of Cherry Address before: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Applicant before: Saic Chery Automobile Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140924 |
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| RJ01 | Rejection of invention patent application after publication |