CN102431457A - Monitoring method of safety monitoring system of electric automobile - Google Patents
Monitoring method of safety monitoring system of electric automobile Download PDFInfo
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- CN102431457A CN102431457A CN2011103151813A CN201110315181A CN102431457A CN 102431457 A CN102431457 A CN 102431457A CN 2011103151813 A CN2011103151813 A CN 2011103151813A CN 201110315181 A CN201110315181 A CN 201110315181A CN 102431457 A CN102431457 A CN 102431457A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
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- 238000002485 combustion reaction Methods 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
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Abstract
The purpose of the invention is to provide a monitoring method of a safety monitoring system of an electric automobile. The safety monitoring system comprises a safety monitor which receives signals from an accelerator pedal position sensor, a motor rotating speed sensor, a motor bus voltage sensor and a motor current sensor of an automobile and respectively outputting a control signal to an enabling pin of a motor driver and a control pin of a switching circuit; a switch controlled by a signal from the control pin is connected in series between an input pin and an output pin of the switching circuit; and the input pin and the output pin of the switching circuit are connected in series in an input circuit of a relay which controls a power supply circuit of a power battery to be on or off. The safety monitor obtains required torque or power of the automobile and torque or power actually output by the automobile according to information, such as the position of the accelerator pedal, the rotating speed of the motor, the voltage of the motor bus, the current of the motor and the like, and turns off the motor as well as disconnects the power supply circuit of the power battery when the torque or power of the automobile beyond the required torque or power to guarantee the safety of the automobile.
Description
Technical field
The invention belongs to the Control of Electric Vehicles field, be specially the technical field of electronlmobil secure context.
Background technology
Energy shock and ecological deterioration have become the key factor of restriction global evolution, and the automobile of research energy-saving and environmental protection is one of effective means of alleviating energy pressure, reduction environmental pollution.Compare with traditional diesel locomotive or hybrid vehicle, electronlmobil adopts driven by power, the purpose that can reach emission abatement, cuts down the consumption of energy.Because battery-driven car adopts high-tension battery as all or part of propulsion source; There are some potential safety hazards; Such as causing Motor torque or power surge because of software error, mistake, electromagnetic interference, hardware damage etc.; The degree of demand head and shoulders above is if untimely eliminating may cause serious consequences such as battery damage even motor and circuit spontaneous combustion.
Summary of the invention
The objective of the invention is to propose a kind of method for supervising of safety monitoring system of electronlmobil; Can monitor the demand torque of automobile or the moment of torsion or the power of power and automobile real output in real time; And when the moment of torsion of automobile or power exceed demand disable motor and the power circuit that breaks off electrokinetic cell, prevent to cause serious consequence.
The safety monitoring system of electronlmobil of the present invention comprises a security monitor; The signal of the accelerator pedal position sensor of said security monitor reception automobile, motor speed sensor, motor bus voltage sensor, motor current sensor; And output control signals to the control pin that enables a pin and a switch circuit of motor driver respectively; Be serially connected with the switch of a controlled pin signal control between the input pin of said switch circuit and the output pin; The input pin of switch circuit and output pin are serially connected in the input circuit of the relay of controlling electrokinetic cell power circuit break-make, and the method for supervising of this safety monitoring system comprises following step:
A: security monitor is gathered the signal of accelerator pedal position sensor and motor speed sensor, and draws the requested torque or the request power of chaufeur through tabling look-up;
B: security monitor is gathered motor drive current through motor current sensor; Through motor bus voltage sensor acquisition motor bus voltage; Gather motor speed through motor speed sensor, and draw the real output moment of torsion or the real output of drive motor according to the motor drive current that collects, motor bus voltage, motor speed;
C: security monitor compares the requested torque of chaufeur and the real output moment of torsion of drive motor or the request power of chaufeur and the real output of drive motor are compared; When the real output moment of torsion of drive motor greater than the real output of the requested torque of chaufeur or drive motor during greater than the request power of chaufeur; Security monitor disable motor actuator, the power circuit of disconnection electrokinetic cell.Security monitor draws the demand torque of automobile or the moment of torsion or the power of power and automobile real output according to the information such as accelerator pedal position, motor speed, motor bus voltage and current of electric of automobile; And when Motor torque or power exceed demand, send signal to motor driver and be serially connected in the relay on the electrokinetic cell power circuit, disable motor and through breaking off the power circuit that relay breaks off electrokinetic cell.
Further, said security monitor is connected with the control pin that enables pin and said switch circuit of said motor driver through an impact switch, and said impact switch is controlled by a crash sensor; When crash sensor detected automobile and bumps, the control impact switch broke off, thereby the disable motor actuator breaks off the power circuit of electrokinetic cell.
Above-mentioned security monitor can be micro controller system, and volume is little, cost is low.
In the above-mentioned B step; The real output moment of torsion of drive motor draws like this: security monitor is at first calculated the value of motor drive current * motor bus voltage * electrical efficiency; Draw the real output moment of torsion of cooresponding drive motor at this moment through tabling look-up according to product and motor speed then, wherein said electrical efficiency obtains through tabling look-up.
In the above-mentioned B step, the real output=motor drive current of drive motor * motor bus voltage * electrical efficiency, wherein electrical efficiency obtains through tabling look-up.
The present invention proposes a kind of method for supervising of safety monitoring system of electronlmobil; Security monitor is through monitoring key components and parts such as car acceleration pedal, drive motor; Can effectively avoid because of the power or the moment of torsion of motor uprush, exceed demand the potential safety hazard that possibly bring; Measures when also having increased auto against has guaranteed the safety of electronlmobil.
Description of drawings
Fig. 1 is the constructional drawing of safety monitoring system of the electronlmobil of embodiment 1;
Fig. 2 is the scheme drawing that is connected of switch circuit and relay among Fig. 1.
The specific embodiment
Specify the present invention below in conjunction with specific embodiment and accompanying drawing.
Embodiment 1:
As shown in Figure 1; The safety monitoring system of the electronlmobil of present embodiment comprises a security monitor 1; The signal of the accelerator pedal position sensor 5 of said security monitor 1 reception automobile, motor speed sensor 7, motor bus voltage sensor 8, motor current sensor 6; And output control signals to the control pin that enables a pin and a switch circuit 12 of motor driver 3 respectively through an impact switch 2; Said impact switch 2 is connected with crash sensor 10, and receives crash sensor 10 controls.The input pin of switch circuit 12 and output pin are serially connected in the input circuit of relay 4 of control electrokinetic cell 11 power circuit break-makes (heavy line is represented the power circuit of electrokinetic cell among the figure).Above-mentioned motor speed sensor 7, motor bus voltage sensor 8, motor current sensor 6, motor driver 3 link to each other with drive motor 9 respectively.
As shown in Figure 2, said switch circuit 12 comprises a relay R L1, and the input end of relay R L1 (being pin 1) is as the control pin of switch circuit 12; Link to each other with impact switch through resistance R 1; Another input end (being pin 2) ground connection when the impact switch input high level, just has electric current to pass through like this in the resistance R 1; Make relay R L1 adhesive, wherein resistance R 1 plays metering function.The mouth of relay R L1 (being pin 4) is connected as the input circuit of the input pin and the relay 4 (being RL2) of switch circuit 12; Another mouth (being pin 3) is connected with an input end of relay 4 (being pin 2) as the output pin of switch circuit 12; Another input end of relay 4 (being pin 1) is connected to input circuit; Two mouths of relay 4 (being pin 3,4) are serially connected in the power circuit of electrokinetic cell, have only after relay R L1 adhesive the conducting of the input circuit of relay 4 ability; If have electric current in the input circuit this moment, relay 4 is promptly by adhesive; After relay R L1 breaks off, there is not electric current to pass through in the input circuit of relay 4, relay 4 also is disconnected.
Concrete control method can be provided with as follows: impact switch 2 has only when automobile bumps for normally closed switch, and crash sensor 10 just can be controlled impact switch 2 and break off; In addition; Security monitor 1 is under normal circumstances sent preset level signal to the control pin that enables pin and switch circuit 12 of motor driver 3 respectively through impact switch 2; For example be the high level signal of 5V, make relay R L1 adhesive, the input circuit conducting of relay 4; Relay 4 just can adhesive under the control of entire car controller like this, drive motor 9 just can be under the control of entire car controller normal operation; Behind something unexpected happened; Security monitor 1 is sent low level signal (the for example signal of 0V) to motor driver 3 and relay 4 respectively through impact switch 2; Perhaps impact switch 2 breaks off, and so just makes the control pin that enables pin and switch circuit 12 of motor driver 3 can't receive preset high level signal again, and motor driver 3 will be closed drive motor 9; Relay R L1 breaks off simultaneously; The input circuit of relay 4 breaks off, and makes relay 4 also break off, thereby breaks off the power circuit of electrokinetic cell 11.
The method for supervising of the safety monitoring system of above-mentioned electronlmobil comprises the steps:
A: security monitor 1 is gathered the signal of accelerator pedal position sensor 5 and motor speed sensor 7; And through looking into the requested torque that < accelerator pedal position-motor speed table-vehicle torsional moment>table draws chaufeur; Above-mentioned < accelerator pedal position-motor speed table-vehicle torsional moment>table for automobile dispatch from the factory before technical personnel draw and be pre-stored in the form of interior reflection motor speed, accelerator pedal position and vehicle torsional moment relation of security monitor 1 according to test; In general, the distance stepped on of vehicle torsional moment and motor speed, acceleration pedal becomes to be similar to the relation of direct ratio;
B: security monitor 1 is gathered motor drive current through motor current sensor 6; Gather the motor bus voltage through motor bus voltage sensor 8; Gather motor speed through motor speed sensor 7, and draw the real output moment of torsion of drive motor 9 according to the motor drive current that collects, motor bus voltage, motor speed;
C: security monitor 1 compares the requested torque of chaufeur and the real output moment of torsion of drive motor 9; When the requested torque of chaufeur during less than the real output moment of torsion of drive motor 9; Security monitor 1 disable motor actuator 3; Thereby close drive motor 9, and control relay 4 disconnections, thereby the power circuit of disconnection electrokinetic cell 11.
In the above-mentioned B step; The real output moment of torsion of drive motor draws like this: security monitor 1 is at first calculated the value of motor drive current * motor bus voltage * electrical efficiency; Draw the real output moment of torsion of cooresponding drive motor 9 at this moment according to product and motor speed through looking into < motor horsepower output-motor speed-motor output torque>table then; Preceding technical personnel draws and is pre-stored in the form that reflection motor speed, horsepower output and motor output torque in the security monitor 1 concern to above-mentioned < motor horsepower output-motor speed-motor output torque>table according to test for automobile dispatches from the factory; In general, motor output torque and motor speed, horsepower output become to be similar to the relation of direct ratio; Electrical efficiency obtains through looking into < motor speed-electrical efficiency>table; Above-mentioned < motor speed-electrical efficiency>table for automobile dispatch from the factory before technical personnel draw and be pre-stored in the interior reflection motor speed of security monitor 1 and the form of electrical efficiency relation according to test, motor speed is different and different because of motor with the relation of electrical efficiency.
In addition, when crash sensor 10 detected automobile and bumps, control impact switch 2 broke off, and motor driver 3 is closed, thereby close drive motor 9; And make relay 4 break off, thereby break off the power circuit of electrokinetic cell 11.
Embodiment 2:
Different with the foregoing description is that the method for supervising of present embodiment comprises the steps:
A: security monitor 1 is gathered the signal and the motor speed of accelerator pedal position sensor 5; And through looking into the request power that < accelerator pedal position-motor speed-power of motor>table draws chaufeur; Above-mentioned < accelerator pedal position-motor speed-power of motor>table for automobile dispatch from the factory before technical personnel draw and be pre-stored in the form of interior reflection accelerator pedal position, motor speed and power of motor relation of security monitor 1 according to test; In general, the distance stepped on of acceleration pedal and the product of motor speed become to be similar to the relation of direct ratio with the power of motor;
B: security monitor 1 is gathered motor drive current through motor current sensor 6; Gather the motor bus voltage through motor bus voltage sensor 8; Gather motor speed through motor speed sensor 7, and draw the real output of drive motor according to the motor drive current that collects, motor bus voltage, motor speed;
C: security monitor 1 compares the request power of chaufeur and the real output of drive motor 9; When the request power of chaufeur during less than the real output of drive motor 9; Security monitor 1 disable motor actuator 3; Thereby close drive motor 9, and control relay 4 disconnections, thereby the power circuit of disconnection electrokinetic cell 11.
In the above-mentioned B step; Real output=the motor drive current of drive motor 9 * motor bus voltage * electrical efficiency; Wherein electrical efficiency obtains through looking into < motor speed-electrical efficiency>table; Above-mentioned < motor speed-electrical efficiency>table for automobile dispatch from the factory before technical personnel draw and be pre-stored in the interior reflection motor speed of security monitor 1 and the form of electrical efficiency relation according to test, motor speed is different and different because of motor with the relation of electrical efficiency.
In addition, when crash sensor 10 detected automobile and bumps, control impact switch 2 broke off, and motor driver 3 is closed, thereby close drive motor 9; And make relay 4 break off, thereby break off the power circuit of electrokinetic cell 11.
Claims (4)
1. the method for supervising of the safety monitoring system of an electronlmobil; This safety monitoring system comprises a security monitor; The signal of the accelerator pedal position sensor of said security monitor reception automobile, motor speed sensor, motor bus voltage sensor, motor current sensor; And output control signals to the control pin that enables a pin and a switch circuit of motor driver respectively; Be serially connected with the switch of a controlled pin signal control between the input pin of said switch circuit and the output pin; The input pin of switch circuit and output pin are serially connected in the input circuit of the relay of controlling electrokinetic cell power circuit break-make, it is characterized in that the method for supervising of this safety monitoring system comprises following step:
A: security monitor is gathered the signal of accelerator pedal position sensor and motor speed sensor, and draws the requested torque or the request power of chaufeur through tabling look-up;
B: security monitor is gathered motor drive current through motor current sensor; Through motor bus voltage sensor acquisition motor bus voltage; Gather motor speed through motor speed sensor, and draw the real output moment of torsion or the real output of drive motor according to the motor drive current that collects, motor bus voltage, motor speed;
C: security monitor compares the requested torque of chaufeur and the real output moment of torsion of drive motor or the request power of chaufeur and the real output of drive motor are compared; When the real output moment of torsion of drive motor greater than the real output of the requested torque of chaufeur or drive motor during greater than the request power of chaufeur; Security monitor disable motor actuator, the power circuit of disconnection electrokinetic cell.
2. the method for supervising of the safety monitoring system of electronlmobil according to claim 1; It is characterized in that said security monitor is connected with the control pin that enables pin and said switch circuit of said motor driver through an impact switch, said impact switch is controlled by a crash sensor; When crash sensor detected automobile and bumps, the control impact switch broke off, thereby the disable motor actuator breaks off the power circuit of electrokinetic cell.
3. the method for supervising of electronlmobil safety monitoring system according to claim 1 and 2; It is characterized in that in the said B step; The real output moment of torsion of drive motor draws like this: security monitor is at first calculated the value of motor drive current * motor bus voltage * electrical efficiency; Draw the real output moment of torsion of cooresponding drive motor at this moment through tabling look-up according to product and motor speed then, wherein said electrical efficiency obtains through tabling look-up.
4. the method for supervising of electronlmobil safety monitoring system according to claim 1 and 2; It is characterized in that in the said B step; Real output=the motor drive current of drive motor * motor bus voltage * electrical efficiency, wherein electrical efficiency obtains through tabling look-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103151813A CN102431457A (en) | 2009-07-08 | 2009-07-08 | Monitoring method of safety monitoring system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103151813A CN102431457A (en) | 2009-07-08 | 2009-07-08 | Monitoring method of safety monitoring system of electric automobile |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910040978.XA Division CN101596901B (en) | 2009-07-08 | 2009-07-08 | Security monitoring system of electric vehicle |
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| CN102431457A true CN102431457A (en) | 2012-05-02 |
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| CN2011103151813A Pending CN102431457A (en) | 2009-07-08 | 2009-07-08 | Monitoring method of safety monitoring system of electric automobile |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332118A (en) * | 2013-06-05 | 2013-10-02 | 奇瑞汽车股份有限公司 | Monitoring method of vehicle control unit of battery electric vehicle |
| CN104108315A (en) * | 2014-06-27 | 2014-10-22 | 三门峡速达交通节能科技股份有限公司 | Electric automobile battery safety protection system and method |
| CN104859452A (en) * | 2014-05-23 | 2015-08-26 | 北汽福田汽车股份有限公司 | Monitoring method and system for running safety of electric vehicle |
| CN106950495A (en) * | 2017-02-27 | 2017-07-14 | 深圳腾势新能源汽车有限公司 | Electric automobile off-line test method and device |
| CN107685732A (en) * | 2016-08-03 | 2018-02-13 | 神华集团有限责任公司 | Automotive power output power control method and control system |
| CN111731110A (en) * | 2019-03-25 | 2020-10-02 | 长城汽车股份有限公司 | Motor system efficiency correction method and device of electric automobile |
| CN113085552A (en) * | 2019-12-23 | 2021-07-09 | 蜂巢传动***(江苏)有限公司保定研发分公司 | Bus voltage control method and system of vehicle motor |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332118A (en) * | 2013-06-05 | 2013-10-02 | 奇瑞汽车股份有限公司 | Monitoring method of vehicle control unit of battery electric vehicle |
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| CN107685732A (en) * | 2016-08-03 | 2018-02-13 | 神华集团有限责任公司 | Automotive power output power control method and control system |
| CN107685732B (en) * | 2016-08-03 | 2019-12-06 | 神华集团有限责任公司 | vehicle power system output power control method and control system |
| CN106950495A (en) * | 2017-02-27 | 2017-07-14 | 深圳腾势新能源汽车有限公司 | Electric automobile off-line test method and device |
| CN111731110A (en) * | 2019-03-25 | 2020-10-02 | 长城汽车股份有限公司 | Motor system efficiency correction method and device of electric automobile |
| CN111731110B (en) * | 2019-03-25 | 2021-11-26 | 长城汽车股份有限公司 | Motor system efficiency correction method and device of electric automobile |
| CN113085552A (en) * | 2019-12-23 | 2021-07-09 | 蜂巢传动***(江苏)有限公司保定研发分公司 | Bus voltage control method and system of vehicle motor |
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Application publication date: 20120502 |