CN101596901B - Security monitoring system of electric vehicle - Google Patents

Security monitoring system of electric vehicle Download PDF

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Publication number
CN101596901B
CN101596901B CN200910040978.XA CN200910040978A CN101596901B CN 101596901 B CN101596901 B CN 101596901B CN 200910040978 A CN200910040978 A CN 200910040978A CN 101596901 B CN101596901 B CN 101596901B
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motor
pin
security monitor
sensor
power
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CN200910040978.XA
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CN101596901A (en
Inventor
杨上东
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Chery Automobile Co Ltd
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SAIC Chery Automobile Co Ltd
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Priority to CN200910040978.XA priority Critical patent/CN101596901B/en
Publication of CN101596901A publication Critical patent/CN101596901A/en
Priority to PCT/CN2010/073486 priority patent/WO2011003311A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • 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
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • 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
    • B60L3/04—Cutting off the power supply under fault conditions
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention aims at providing a security monitoring system of an electric vehicle and a monitoring method thereof. The security monitoring system comprises a security monitor, wherein, the security monitor receives signals of an accelerator pedal position sensor, a motor rotational speed sensor, a motor bus voltage sensor and a motor electric current of a vehicle and outputs control signals to an enable pin of a motor driver and a control pin of a switching circuit respectively; a switch controlled by the signal of the control pin is connected between the input pin and the output pin of the switching circuit in series; and the input pin and the output pin of the switching circuit is connected in a relay input circuit for controlling the on/off of a power battery power supply circuit in series. The security monitor obtains the required torque or power of the vehicle and the actual output torque or power of the vehicle according to information of the accelerator pedal position, motor speed, motor bus voltage, motor current and the like; and a driving motor is closed and the power battery power supply circuit is cut off when the torque or power of the vehicle exceeds requirement, thereby ensuring the security of the vehicle.

Description

A kind of safety monitoring system of electronlmobil
Technical field
The invention belongs to 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 Pressure on Energy, reduction environmental pollution.Compare with traditional diesel locomotive or hybrid electric vehicle, electronlmobil adopts driven by power, can reach the object that reduces discharge, reduces energy consumption.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., degree far beyond demand, if get rid of not in time, may cause battery to damage the even serious consequence such as motor and circuit spontaneous combustion.
summary of the invention
The object of the invention is to propose a kind of safety monitoring system of electronlmobil, this safety monitoring system can the demand torque of Real-Time Monitoring automobile or moment of torsion or the power of power and the actual output of automobile, and when the moment of torsion of automobile or power exceed demand disable motor and disconnect the power circuit of electrokinetic cell, prevent from causing serious consequence.
The safety monitoring system of electronlmobil of the present invention comprises a security monitor, described security monitor receives the accelerator pedal position sensor of automobile, motor speed sensor, motor bus voltage sensor, the signal of motor current sensor, and output control signals to respectively the control pin that enables pin and a switch circuit of motor driver, between the input pin of described switch circuit and output pin, be serially connected with the switch of a controlled pin signal control, 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.
Security monitor draws the demand torque of automobile or moment of torsion or the power of power and the actual output of automobile according to information such as the accelerator pedal position of automobile, motor speed, motor bus voltage and current of electric, and when Motor torque or power exceed demand, send signal to motor driver and be serially connected in the relay on electrokinetic cell power circuit, disable motor and disconnect the power circuit of electrokinetic cell by disconnecting relay.
Described security monitor is connected with the control pin that enables pin and described switch circuit of described motor driver by an impact switch, and described impact switch is controlled by a crash sensor.When automobile bumps, crash sensor disconnects impact switch, thereby closes drive motor and disconnect the power circuit of electrokinetic cell, in order to avoid cause serious consequence.
Above-mentioned security monitor can be micro controller system, and volume is little, cost is low.
The present invention proposes the method for supervising of above-mentioned safety monitoring system.
The first method for supervising comprises the steps: A: security monitor gathers the signal of accelerator pedal position sensor and motor speed sensor, and by tabling look-up, draws the requested torque of chaufeur; B: security monitor gathers motor drive current by motor current sensor, by motor bus voltage sensor, gather motor bus voltage, by motor speed sensor, gather motor speed, and according to the motor drive current collecting, motor bus voltage, motor speed, draw the actual output torque of drive motor; C: security monitor compares the actual output torque of the requested torque of chaufeur and drive motor, when the actual output torque of drive motor is greater than the requested torque of chaufeur, security monitor disable motor actuator, the power circuit of disconnection electrokinetic cell.
In above-mentioned B step, the actual output torque of drive motor draws like this: first security monitor calculates the value of motor drive current * motor bus voltage * electrical efficiency, then according to product and motor speed, draw the now actual output torque of the drive motor of correspondence by tabling look-up, wherein said electrical efficiency obtains by tabling look-up.
In addition, when crash sensor detects automobile and bumps, control impact switch and disconnect, thereby disable motor actuator disconnects the power circuit of electrokinetic cell.
The second method for supervising comprises the steps: A: security monitor gathers signal and the motor speed of accelerator pedal position sensor, and by tabling look-up, draws the request power of chaufeur; B: security monitor gathers motor drive current by motor current sensor, by motor bus voltage sensor, gather motor bus voltage, by motor speed sensor, gather motor speed, and according to the motor drive current collecting, motor bus voltage, motor speed, draw the real output of drive motor; C: security monitor compares the request power of chaufeur and the real output of drive motor, when the real output of drive motor is greater than the request power of chaufeur, security monitor disable motor actuator, the power circuit of disconnection electrokinetic cell.
In above-mentioned B step, the real output=motor drive current of drive motor * motor bus voltage * electrical efficiency, wherein electrical efficiency obtains by tabling look-up.
In addition, when crash sensor detects automobile and bumps, control impact switch and disconnect, thereby disable motor actuator disconnects the power circuit of electrokinetic cell.
The present invention proposes a kind of safety monitoring system and method for supervising thereof of electronlmobil, security monitor is by monitoring key components and parts such as car ACCEL, drive motor, can effectively avoid uprushing, exceed because of power or the moment of torsion of motor the potential safety hazard that demand may be brought, insurance measure while also having increased auto against, has guaranteed the safety of electronlmobil.
Accompanying drawing explanation
Fig. 1 is the constructional drawing of safety monitoring system of the electronlmobil of embodiment 1;
Fig. 2 is switch circuit in Fig. 1 and the connection diagram of relay.
The specific embodiment
Below in conjunction with specific embodiments and the drawings, describe the present invention in detail.
Embodiment 1:
As shown in Figure 1, the safety monitoring system of the electronlmobil of the present embodiment comprises a security monitor 1, the signal of the accelerator pedal position sensor 5 of described security monitor 1 reception automobile, motor speed sensor 7, motor bus voltage sensor 8, motor current sensor 6, and by an impact switch 2, output control signals to respectively the control pin that enables pin and a switch circuit 12 of motor driver 3, described impact switch 2 is connected with crash sensor 10, and controlled by crash sensor 10.The input pin of switch circuit 12 and output pin are serially connected in the input circuit of the relay 4 of controlling electrokinetic cell 11 power circuit break-makes (figure first heavy line represents the power circuit of electrokinetic cell).Above-mentioned motor speed sensor 7, motor bus voltage sensor 8, motor current sensor 6, motor driver 3 are connected with drive motor 9 respectively.
As shown in Figure 2, described switch circuit 12 comprises a relay R L1, an input end of relay R L1 (being pin 1) is as the control pin of switch circuit 12, by resistance R 1, be connected with impact switch, another input end (being pin 2) ground connection, when impact switch input high level, just has electric current to pass through like this in resistance R 1, make relay R L1 adhesive, wherein resistance R 1 plays metering function.A mouth of relay R L1 (being pin 4) is connected as the input circuit of 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 (are pin 3, 4) be serially connected in the power circuit of electrokinetic cell, only have after relay R L1 adhesive, the input circuit ability conducting of relay 4, if now have electric current in input circuit, relay 4 is by adhesive, after relay R L1 disconnects, in the input circuit of relay 4, do not have electric current to pass through, relay 4 is also disconnected.
Concrete control method can arrange as follows: impact switch 2, for normally closed switch, only has when automobile bumps, and crash sensor 10 just can be controlled impact switch 2 and disconnect; In addition, security monitor 1 is sent default level signal to the control pin that enables pin and switch circuit 12 of motor driver 3 respectively by impact switch 2 under normal circumstances, it is for example 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, and drive motor 9 just can work under the control of entire car controller; After something unexpected happened, security monitor 1 is sent low level signal (for example signal of 0V) to motor driver 3 and relay 4 respectively by impact switch 2, or impact switch 2 disconnects, so just make the control pin that enables pin and switch circuit 12 of motor driver 3 cannot receive again default high level signal, motor driver 3 will be closed drive motor 9, relay R L1 disconnects simultaneously, the input circuit of relay 4 disconnects, relay 4 is also disconnected, thereby disconnect 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 gathers the signal of accelerator pedal position sensor 5 and motor speed sensor 7, and by looking into < accelerator pedal position-motor speed table-vehicle torsional moment > table, draw the requested torque of chaufeur, above-mentioned < accelerator pedal position-motor speed table-vehicle torsional moment > table for automobile dispatch from the factory before technical personnel according to test, draw and be pre-stored in the reflection motor speed in security monitor 1, the form of accelerator pedal position and vehicle torsional moment relation, in general, vehicle torsional moment and motor speed, the distance that acceleration pedal is stepped on becomes the relation of approximate direct ratio,
B: security monitor 1 gathers motor drive current by motor current sensor 6, by motor bus voltage sensor 8, gather motor bus voltage, by motor speed sensor 7, gather motor speed, and according to the motor drive current collecting, motor bus voltage, motor speed, draw the actual output torque of drive motor 9;
C: security monitor 1 compares the actual output torque of the requested torque of chaufeur and drive motor 9, when the requested torque of chaufeur is less than the actual output torque 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 above-mentioned B step, the actual output torque of drive motor draws like this: first security monitor 1 calculates the value of motor drive current * motor bus voltage * electrical efficiency, then according to product and motor speed, by looking into < output power of motor-motor speed-motor output torque > table, draw the actual output torque of now corresponding drive motor 9, above-mentioned < output power of motor-motor speed-motor output torque > table for automobile dispatch from the factory before technical personnel according to test, draw and be pre-stored in the reflection motor speed in security monitor 1, the form of horsepower output and motor output torque relation, in general, motor output torque and motor speed, horsepower output becomes the relation of approximate direct ratio, electrical efficiency obtains by looking into < motor speed-electrical efficiency > table, above-mentioned < motor speed-electrical efficiency > table for automobile dispatch from the factory before technical personnel according to test, draw and be pre-stored in reflection motor speed in security monitor 1 and the form of electrical efficiency relation, the relation of motor speed and electrical efficiency because of motor different and different.
In addition, when crash sensor 10 detects automobile and bumps, control impact switch 2 and disconnect, motor driver 3 is closed, thereby close drive motor 9; And relay 4 is disconnected, thereby disconnect the power circuit of electrokinetic cell 11.
Embodiment 2:
Different from above-described embodiment, the method for supervising of the present embodiment comprises the steps:
A: security monitor 1 gathers signal and the motor speed of accelerator pedal position sensor 5, and by looking into < accelerator pedal position-motor speed-power of motor > table, draw the request power of chaufeur, above-mentioned < accelerator pedal position-motor speed-power of motor > table for automobile dispatch from the factory before technical personnel according to test, draw and be pre-stored in the reflection accelerator pedal position in security monitor 1, the form of motor speed and power of motor relation, in general, the distance that acceleration pedal is stepped on becomes to be similar to the relation of direct ratio with the power of motor with the product of motor speed,
B: security monitor 1 gathers motor drive current by motor current sensor 6, by motor bus voltage sensor 8, gather motor bus voltage, by motor speed sensor 7, gather motor speed, and according to the motor drive current collecting, motor bus voltage, motor speed, draw the real output of drive motor;
C: security monitor 1 compares the real output of the request power of chaufeur and drive motor 9, when the request power of chaufeur is 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 above-mentioned B step, real output=the motor drive current of drive motor 9 * motor bus voltage * electrical efficiency, wherein electrical efficiency obtains by looking into < motor speed-electrical efficiency > table, above-mentioned < motor speed-electrical efficiency > table for automobile dispatch from the factory before technical personnel according to test, draw and be pre-stored in reflection motor speed in security monitor 1 and the form of electrical efficiency relation, the relation of motor speed and electrical efficiency because of motor different and different.
In addition, when crash sensor 10 detects automobile and bumps, control impact switch 2 and disconnect, motor driver 3 is closed, thereby close drive motor 9; And relay 4 is disconnected, thereby disconnect the power circuit of electrokinetic cell 11.

Claims (1)

1. the safety monitoring system of an electronlmobil, this safety monitoring system comprises a security monitor, described security monitor receives the accelerator pedal position sensor of automobile, motor speed sensor, motor bus voltage sensor, the signal of motor current sensor, and output control signals to respectively the control pin that enables pin and a switch circuit of motor driver, it is characterized in that being serially connected with between the input pin of described switch circuit and output pin the switch of a controlled pin signal control, 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, described security monitor is connected with the control pin that enables pin and described switch circuit of described motor driver by an impact switch, and described impact switch is controlled by a crash sensor.
CN200910040978.XA 2009-07-08 2009-07-08 Security monitoring system of electric vehicle Active CN101596901B (en)

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Application Number Priority Date Filing Date Title
CN200910040978.XA CN101596901B (en) 2009-07-08 2009-07-08 Security monitoring system of electric vehicle
PCT/CN2010/073486 WO2011003311A1 (en) 2009-07-08 2010-06-03 Security monitoring system for electric vehicle and monitoring method thereof

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Application Number Priority Date Filing Date Title
CN200910040978.XA CN101596901B (en) 2009-07-08 2009-07-08 Security monitoring system of electric vehicle

Related Child Applications (1)

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CN2011103151813A Division CN102431457A (en) 2009-07-08 2009-07-08 Monitoring method of safety monitoring system of electric automobile

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CN101596901A CN101596901A (en) 2009-12-09
CN101596901B true CN101596901B (en) 2014-02-05

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CN101596901B (en) * 2009-07-08 2014-02-05 奇瑞汽车股份有限公司 Security monitoring system of electric vehicle
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