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CN106183824B - A kind of method and device of high voltage loop of electric automobile security control - Google Patents

A kind of method and device of high voltage loop of electric automobile security control Download PDF

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Publication number
CN106183824B
CN106183824B CN201610561297.8A CN201610561297A CN106183824B CN 106183824 B CN106183824 B CN 106183824B CN 201610561297 A CN201610561297 A CN 201610561297A CN 106183824 B CN106183824 B CN 106183824B
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vehicle
state
tension loop
high tension
entire car
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CN106183824A (en
Inventor
张帅领
孙保国
张宇
曹桂军
刘飞
应翔
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Beijing Hyundai Motor Co Ltd
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Beijing Hyundai Motor Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption

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

Abstract

The invention discloses a kind of method and device of high voltage loop of electric automobile security control, method includes: entire car controller according to covering unexpected unlatching event as a result, determining and charging whether occurring in vehicle travel process to charging lid open state real-time detection;When entire car controller determines that charging lid has occurred in vehicle travel process surprisingly opens event, remain turned on high tension loop, so as to vehicle driving;High tension loop is set to remain turned on period in described, entire car controller detects Vehicle Speed, and after detecting that car speed is kept to zero speed, high tension loop is switched to off-state.The out-of-control phenomenon generation for jeopardizing personnel and vehicle is opened the invention avoids charging lid in driving conditions unexpected (mechanical oscillation impact etc.), is improved full-vehicle control performance, is improved vehicle reliability of operation.

Description

A kind of method and device of high voltage loop of electric automobile security control
Technical field
The present invention relates to electric automobile whole control technology field, in particular to a kind of high voltage loop of electric automobile is controlled safely The method and device of system.
Background technique
In recent years, environmental pollution is got worse, and air quality constantly deteriorates, containing big in the vehicle exhaust of conventional fuel oil car Pollutant is measured, is one of the causes of haze.The research of electric car be environmental protection problem and energy problem increasingly by To what is risen in the case where concern, country has been carried out the strategic plan of electric vehicle development at present, and future is for response environment And energy crisis, the research and development of electric vehicle and large-scale use become inexorable trend.It is electronic for traditional combustion engine automobile Generally there is the electrical system of up to upper 300V or more on automobile, for operating current up to 200A or more, this has been more than human-body safety electricity Range is pressed, such as without reasonably designing and protecting, it would be possible to bring the high pressures safety problems such as personnel's electric shock;If simultaneously cannot Well solve the problem, the development of electric car and it is universal will be by very big negative effect.Typical pure electric automobile is high Voltage electrical system structure is as shown in Figure 1, include many high voltage electric parts in electric car, if fast charge charges in driving conditions Lid SW1 or trickle charge charging lid SW2 will lead to high pressure when surprisingly opening S and disconnect vehicle forfeiture power suddenly, if vehicle fails to make Correct judgement and response may result in parts damages, personnel's electric shock or major traffic accidents, therefore improve in electric vehicle performance And during industrialization of gradually marching toward, driving mesohigh breakdown judge and response function are studied and improved, vehicle safety is improved, drives Multiply personnel safety and automobilism Environmental security has become the important topic of each producer's research.
Summary of the invention
The technical issues of scheme provided according to embodiments of the present invention solves, which is that charging lid is unexpected in vehicle travel process, opens Opening leads to vehicle and the unsafe problem of personnel.
A kind of method of the high voltage loop of electric automobile security control provided according to embodiments of the present invention, comprising:
Entire car controller according to charging lid open state real-time detection as a result, determine vehicle travel process in whether occur Charging lid is unexpected to open event;
When entire car controller determines that charging lid has occurred in vehicle travel process surprisingly opens event, protect high tension loop On-state is held, so as to vehicle driving;
High tension loop is set to remain turned on period in described, entire car controller detects Vehicle Speed, And after detecting that car speed is kept to zero speed, high tension loop is switched to off-state.
Preferably, further includes:
Entire car controller according to charging lid open state real-time detection as a result, determine vehicle idling docking process in whether The unexpected unlatching event of charging lid occurs;
When entire car controller determines that charging lid has occurred in vehicle idling docking process surprisingly opens event, to vehicle sky Capable detection is transferred in, and after detecting that vehicle air conditioning is closed, the on-state of high tension loop is switched to off-state.
Preferably, after high tension loop is switched to off-state by entire car controller, further includes:
Entire car controller sends lower electric control instruction to power battery management system;
After power battery management system receives lower electric control instruction, total positive high voltage relay and total negative high voltage relay are disconnected Device makes electric under high tension loop.
Preferably, high tension loop is made to remain turned on period in described, further includes:
Entire car controller within the set time maintains accelerator pedal signal, motor enable bit and driving motor torque Effect state, while starting charge switch indicator light and double flashing lights in combination instrument and carrying out alarm prompt, and will outside setting time Accelerator pedal signal, motor enable bit and driving motor torque are set as invalid state.
Preferably, further includes:
During vehicle launch, entire car controller detection charging lid is in close state or open state;
If entire car controller detection charging lid is in off state, connect high tension loop by closed high main relay It is logical, while control instruction is powered on to power battery management system transmission, so that power battery management system is received electric control and refers to After order, it is closed total positive high voltage relay and total negative high voltage relay, powers on high tension loop;
If entire car controller detection charging lid is open state, disconnect high pressure by disconnecting high pressure main relay, together When to power battery management system send lower electric control instruction, after so that power battery management system is received lower electric control instruction, It is closed total positive high voltage relay and total negative high voltage relay, is made electric under high tension loop.
A kind of device of the high voltage loop of electric automobile security control provided according to embodiments of the present invention, comprising:
Judgment module, for according to charging lid open state real-time detection as a result, determine vehicle travel process in whether The unexpected unlatching event of charging lid occurs;
Control module, for pushing back height when determining that charging lid has occurred in vehicle travel process surprisingly opens event Road remains turned on, so as to vehicle driving, and it is described remain turned on high tension loop during, to vehicle driving Speed is detected, and after detecting that car speed is kept to zero speed, high tension loop is switched to off-state.
Preferably, the judgment module is also used to basis to charging lid open state real-time detection as a result, determining that vehicle is idle Charging whether occurs in fast docking process and covers unexpected unlatching event.
Preferably, the control module, which is also used to work as, determines that charging has occurred in vehicle idling docking process covers unexpected unlatching When event, vehicle air conditioning is detected, and after detecting that vehicle air conditioning is closed, the on-state of high tension loop is switched to Off-state.
Preferably, the control module is also used to disconnect total positive high voltage relay and total negative high voltage relay, pushes back height It is electric under road.
Preferably, the control module is also used to accelerator pedal signal, motor enable bit and drive within the set time Dynamic Motor torque keeps effective status, while starting charge switch indicator light and double flashing lights in combination instrument and carrying out alarm prompt, And invalid state is set by accelerator pedal signal, motor enable bit and driving motor torque outside setting time.
The scheme provided according to embodiments of the present invention, if by vehicle travel process entire car controller detect charging Lid is opened, and entire car controller keeps high tension loop to connect, while charging indicator light and double arcing fault lamps are lighted in combination instrument, with Just it alerts driver and vehicle evades traveling and allows driver to give it the gun until speed is down to 0 and vehicle is moved to safety below Area.If entire car controller detects that charging lid is opened in idling parking, entire car controller disconnects high tension loop, and vehicle cannot READY avoids charging lid unexpected (mechanical oscillation impact etc.) in driving conditions from opening the out-of-control phenomenon hair for jeopardizing personnel and vehicle It is raw, full-vehicle control performance is improved, vehicle reliability of operation is improved.
Detailed description of the invention
Fig. 1 is the electric vehicle high-voltage safety electrical interlocks circuit diagram that the prior art provides;
Fig. 2 is a kind of method flow diagram of high voltage loop of electric automobile security control provided in an embodiment of the present invention;
Fig. 3 is a kind of schematic device of high voltage loop of electric automobile security control provided in an embodiment of the present invention;
Fig. 4 is the circuit diagram of electric vehicle high-voltage safety electrical interlocks provided in an embodiment of the present invention;
Fig. 5 is the flow chart controlled in electric vehicle start-up course provided in an embodiment of the present invention;
Fig. 6 is the flow chart that electric vehicle driving process provided in an embodiment of the present invention interrupts electric control;
Fig. 7 is the flow chart that electric vehicle idling docking process provided in an embodiment of the present invention interrupts electric control.
Specific embodiment
Below in conjunction with attached drawing to a preferred embodiment of the present invention will be described in detail, it should be understood that described below is excellent Select embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 2 is a kind of method flow diagram of high voltage loop of electric automobile security control provided in an embodiment of the present invention, such as Fig. 2 It is shown, comprising:
Step S201: entire car controller according to charging lid open state real-time detection as a result, determine vehicle travel process In charging whether occur cover unexpected unlatching event;
Step S202: when entire car controller determines that charging lid has occurred in vehicle travel process surprisingly opens event, make High tension loop remains turned on, so as to vehicle driving;
Step S203: high tension loop is made to remain turned on period in described, entire car controller is to Vehicle Speed It is detected, and after detecting that car speed is kept to zero speed, high tension loop is switched to off-state.
The invention also includes: entire car controller according to charging lid open state real-time detection as a result, determining vehicle idling Charging whether occurs in docking process and covers unexpected unlatching event;It is had occurred when entire car controller determines in vehicle idling docking process When charging lid surprisingly opens event, vehicle air conditioning is detected, and after detecting that vehicle air conditioning is closed, by high tension loop On-state is switched to off-state.
Wherein, after high tension loop is switched to off-state by entire car controller, further includes: entire car controller is to power electric Pond management system sends lower electric control instruction;After power battery management system receives lower electric control instruction, total positive high voltage is disconnected Relay and total negative high voltage relay make electric under high tension loop.
Wherein, high tension loop is made to remain turned on period in described, further includes: entire car controller is within the set time Accelerator pedal signal, motor enable bit and driving motor torque are kept into effective status, while starting in combination instrument and charging Switch indication light and double flashing lights carry out alarm prompt, and by accelerator pedal signal, motor enable bit and drive outside setting time Dynamic Motor torque is set as invalid state.
The invention also includes: during vehicle launch, entire car controller detection charging lid is in close state or opens Open state;If entire car controller detection charging lid is in off state, connect high tension loop by closed high main relay, Control instruction is powered on to power battery management system transmission simultaneously, power battery management system is received and powers on control instruction Afterwards, it is closed total positive high voltage relay and total negative high voltage relay, powers on high tension loop;If entire car controller detection charging lid is Open state then disconnects high pressure by disconnecting high pressure main relay, while sending lower electric control to power battery management system Instruction is closed total positive high voltage relay and total negative high voltage relay after so that power battery management system is received lower electric control instruction Device makes electric under high tension loop.
Fig. 3 is a kind of schematic device of high voltage loop of electric automobile security control provided in an embodiment of the present invention, such as Fig. 3 It is shown, comprising: judgment module 301, for basis to charging lid open state real-time detection as a result, determining in vehicle travel process Whether generation charging lid is unexpected is opened event;Control module 302 determines that charging lid has occurred in vehicle travel process anticipates for working as When external-open notice part, high tension loop is remained turned on, so as to vehicle driving, and described connects high tension loop holding During logical state, Vehicle Speed is detected, and after detecting that car speed is kept to zero speed, high tension loop is cut Change to off-state.
Wherein, the judgment module 301 is also used to basis to charging lid open state real-time detection as a result, determining that vehicle is idle Charging whether occurs in fast docking process and covers unexpected unlatching event.
Wherein, the control module 302, which is also used to work as, determines that charging lid has occurred in vehicle idling docking process surprisingly to be opened When notice part, vehicle air conditioning is detected, and after detecting that vehicle air conditioning is closed, the on-state of high tension loop is switched To off-state.
Specifically, the control module 302 be also used within the set time by accelerator pedal signal, motor enable bit with And driving motor torque keeps effective status, while starting in combination instrument charge switch indicator light and double flashing lights carry out alarm and mention Show, and sets invalid state for accelerator pedal signal, motor enable bit and driving motor torque outside setting time, and break Total positive high voltage relay and total negative high voltage relay are opened, is made electric under high tension loop.
Fig. 4 is the circuit diagram of electric vehicle high-voltage safety electrical interlocks provided in an embodiment of the present invention, as shown in Figure 4, comprising: VCU (Vehicle Control Unit, entire car controller), power BMS (Battery Management System, battery pack Management system), combination instrument ICM, MCU (Motor Control Unit, motor control unit), total positive high voltage relay K1, Total negative high voltage relay K2, high pressure main relay K3, ON electricity low-voltage relay K4, trickle charge switch SW1, fast charge switch SW2, double sudden strains of a muscle The composition such as lamp relay K5, high-voltage connector.The function of entire car controller is made of 4 parts, and (1) acquisition trickle charge in real time switch passes The signal of sensor, the signal of fast charge switch sensor and ON grades of voltage signals;(2) control high pressure main relay K3 and double flashing lights after The disconnection and closure of electric appliance K5;(3) CAN bus communication is carried out with power battery pack management system BMS, is sent to it power-on and power-off and refers to Enable the off and on for completing vehicle high tension loop.(4) CAN bus communication is carried out with motor control unit MCU, is sent to it mesh Vehicle power output is completed in mark mode and target torque instruction.
Fig. 5 is the flow chart controlled in electric vehicle start-up course provided in an embodiment of the present invention, as shown in figure 5, in vehicle In start-up course, firstly, whether entire car controller VCU monitoring driver steps on brake, initiation key gets to ON grades, is attracted ON electricity Low-voltage relay K4 electrically connects high pressure main relay K3 control terminal with power source ON, and gear is located at P or N grades, and entire car controller is logical Cross CAN bus real-time monitoring power battery management system BMS and driving motor control unit MCU status information.Secondly, vehicle control Device VCU processed monitors trickle charge switch SW1 and fast charge switch SW2 switch state by signal wire, if trickle charge switch SW1 and fast charge switch SW2, which is closed, ensures charge switch signal wire safety ground.Finally, if entire car controller VCU determines in whole-control system respectively A control unit module is without level-one or secondary failure, battery management system BMS and driving motor control unit MCU init state Completion, which is waited a moment, fills switch SW1 and fast charge switch SW2 and is in closed state, and entire car controller VCU controls high pressure main relay K3 Signal, which is set to low level, to be made high pressure main relay K3 while passing through CAN bus in power battery management system BMS transmission high pressure Electric control instruction is closed total positive high voltage relay K1 when entire car controller VCU monitors power battery management system BMS, always bears After high-voltage relay K2, high tension loop realizes that safety powers on, at this time vehicle READY;If entire car controller determine vehicle exist with Lower either case exits high pressure and powers on control flow:
1. there are level-one or secondary failures for each control unit module in whole-control system;
2. trickle charge switch SW1 and fast charge switch SW2 at least one is in an off state;
3. power battery management system BMS and driving motor control unit MCU initialization self-test does not complete;
4. driver does not carry out power on operation;
5. total positive high voltage relay K1, total negative high voltage relay K2 are not closed in power up.
Entire car controller monitors above five kinds of situations, disconnects high pressure main relay and passes through CAN bus to power electric simultaneously Pond sends lower electric control instruction, and power battery management system disconnects total positive high voltage relay, total negative high voltage relay, to complete Charge switch and high tension loop interlock function, vehicle are unable to READY.
Fig. 6 is the flow chart that electric vehicle driving process provided in an embodiment of the present invention interrupts electric control, as shown in fig. 6, During vehicle driving (vehicle is in normal READY state and speed is greater than 0), if entire car controller VCU real-time detection arrives Trickle charge switch SW1 or fast charge charge switch SW2 is in unexpected open state, and entire car controller VCU is enabled at emergency vehicle immediately Time counter starting is managed, high tension loop protects control strategy as follows:
It is less than within the scope of the time T0 of setting if driver emergency handles counter, entire car controller VCU closure is high at this time Press main relay K3 that high tension loop is kept to connect, by accelerator pedal signal, driving motor enable bit and driving motor electric torque It is still within effective status, but power generation torque is in invalid state and forbids vehicle energy recycling function, enabled in combination instrument ICM Charge switch indicator light lamp and closing relay K5 open double flashing lights, alert driver and vehicle evades traveling below, if at this time Driver, which observes vehicle and is in hazardous environment, to be needed to give it the gun, and entire car controller VCU still allows vehicle to accelerate to go at full capacity It sails until speed is down to 0 and vehicle is moved to safety area.Speed is once reduced to 0, and entire car controller VCU then determines that vehicle has moved into Safety area, driver's accelerator pedal signal, motor enable bit and motor driving torque are placed in nothing by entire car controller VCU at this time Effect state, cutoff high main relay K3 are instructed by sending electricity under high pressure to power battery management system BMS simultaneously, make vehicle High tension loop disconnection and vehicle are unable to READY.
Whether the T0 if driver emergency processing counter exceeds schedule time is in safety area regardless of vehicle is practical, whole Driver's accelerator pedal signal, motor enable bit and motor driving torque are placed in invalid state by vehicle controller VCU, are directly cut Broken height pressure main relay K3 disconnects vehicle high-voltage circuit with vehicle from READY.
After vehicle speed is down to 0, after vehicle is unable to READY, driver must detect trickle charge switch SW1 and fast charge switch SW2 Switch state, after confirmation charging lid is closed, re-powering again after electricity under vehicle can make vehicle be in READY state, realize The unexpected unlatching of charging lid (mechanical oscillation impact etc.) in driving conditions is avoided in vehicle high speed driving process, causes vehicle disconnected Electricity and out-of-control phenomenon, improve vehicle driving security performance.
Fig. 7 is the flow chart that electric vehicle idling docking process provided in an embodiment of the present invention interrupts electric control, such as Fig. 7 institute Show, during vehicle idling parking (vehicle is in normal READY state and speed is 0), entire car controller VCU is examined in real time It measures trickle charge switch SW1 or fast charge switch SW2 is in the open state, if air-conditioning is in the open state, to ensure that air-conditioning high pressure is pacified Entirely, it first closes air-conditioning and then disconnecting high pressure main relay K3 again makes high tension loop disconnect and send out to power battery management system BMS Lower electric control is sent to instruct;If air-conditioning is in close state, entire car controller VCU, which directly disconnects high pressure main relay K3, pushes back height Road disconnects and sends lower electric control instruction to power battery management system BMS and by driver's accelerator pedal signal, driving motor Enable bit and driving motor target torque are placed in invalid state, it is ensured that electricity and vehicle are unable to READY under vehicle safety.
After vehicle is unable to READY, driver must detect trickle charge switch SW1 and fast charge switch SW2 switch state, confirmation charging After lid closure, re-powering again after electricity under vehicle can make vehicle be in READY state, realize high tension loop and connect and charge Switch state safety interlock function, improves vehicle safety performance.
The scheme provided according to embodiments of the present invention can effectively avoid electric vehicle from charging when driving and cover unexpected open Opening causes high pressure to disconnect suddenly and out-of-control phenomenon.Opened if charging lid is unexpected in driving, the design of vehicle high-voltage electrical apparatus circuit or Entire car controller responsive measures are unreasonable, and may result in parts damages, personnel's electric shock or major traffic accidents.It utilizes High-voltage electrical apparatus safety interlock circuitry simultaneously can not only realize vehicle launch and vehicle idling in conjunction with vehicle control unit controls Preservation tactics The monitoring and control of docking process mesohigh secured electrical interlocking loop more ensures that charging lid is unexpected when driving and opens When vehicle driver can be allowed to give it the gun to safety area at the appointed time to overhaul vehicle, improve driving high speed row Sail security performance.
Although describing the invention in detail above, but the invention is not restricted to this, those skilled in the art of the present technique It can be carry out various modifications with principle according to the present invention.Therefore, all to be modified according to made by the principle of the invention, all it should be understood as Fall into protection scope of the present invention.

Claims (7)

1. a kind of method of high voltage loop of electric automobile security control, comprising:
Entire car controller according to charging lid open state real-time detection as a result, determine vehicle travel process in whether charge Lid is unexpected to open event;
When entire car controller determines that charging lid has occurred in vehicle travel process surprisingly opens event, connect high tension loop holding Logical state, so as to vehicle driving;
High tension loop is set to remain turned on period in described, entire car controller detects Vehicle Speed, and After detecting that car speed is kept to zero speed, high tension loop is switched to off-state;
Entire car controller according to charging lid open state real-time detection as a result, determine vehicle idling docking process in whether occur Charging lid is unexpected to open event;
When entire car controller determines and has occurred that charging lid is unexpected to open event in vehicle idling docking process, to vehicle air conditioning into Row detection, and after detecting that vehicle air conditioning is closed, the on-state of high tension loop is switched to off-state.
2. according to the method described in claim 1, after high tension loop is switched to off-state by entire car controller, further includes:
Entire car controller sends lower electric control instruction to power battery management system;
After power battery management system receives lower electric control instruction, total positive high voltage relay and total negative high voltage relay are disconnected, Make electric under high tension loop.
3. according to the method described in claim 1, making high tension loop remain turned on period in described, further includes:
Accelerator pedal signal, motor enable bit and driving motor torque are kept effective shape within the set time by entire car controller State, while starting charge switch indicator light and double flashing lights in combination instrument and carrying out alarm prompt, and will accelerate outside setting time Pedal signal, motor enable bit and driving motor torque are set as invalid state.
4. method according to claim 1 to 3, further includes:
During vehicle launch, entire car controller detection charging lid is in close state or open state;
If entire car controller detection charging lid is in off state, connect high tension loop by closed high main relay, together When to power battery management system transmission power on control instruction, after so that power battery management system is received and is powered on control instruction, It is closed total positive high voltage relay and total negative high voltage relay, powers on high tension loop;
If entire car controller detection charging lid is open state, disconnect high pressure by disconnecting high pressure main relay, while to Power battery management system sends lower electric control instruction, after so that power battery management system is received lower electric control instruction, disconnects Total positive high voltage relay and total negative high voltage relay make electric under high tension loop.
5. a kind of device of high voltage loop of electric automobile security control, comprising:
Judgment module, for basis to charging lid open state real-time detection as a result, determining in vehicle travel process whether occur Charging lid is unexpected to open event;
Control module, for protecting high tension loop when determining that charging lid has occurred in vehicle travel process surprisingly opens event Hold on-state, so as to vehicle driving, and it is described remain turned on high tension loop during, to Vehicle Speed It is detected, and after detecting that car speed is kept to zero speed, high tension loop is switched to off-state;
Wherein the judgment module is also used to: according to charging lid open state real-time detection as a result, determine vehicle idling parking Charging whether occurs in the process and covers unexpected unlatching event;The unexpected unlatching of charging lid has occurred in vehicle idling docking process when determining When event, vehicle air conditioning is detected, and after detecting that vehicle air conditioning is closed, the on-state of high tension loop is switched to Off-state.
6. device according to claim 5, the control module is also used to disconnect total positive high voltage relay and total negative high voltage Relay makes electric under high tension loop.
7. device according to claim 5, the control module is also used to accelerator pedal signal, electricity within the set time Machine enable bit and driving motor torque keep effective status, while starting charge switch indicator light and double flashing lights in combination instrument Alarm prompt is carried out, and sets nothing for accelerator pedal signal, motor enable bit and driving motor torque outside setting time Effect state.
CN201610561297.8A 2016-07-15 2016-07-15 A kind of method and device of high voltage loop of electric automobile security control Active CN106183824B (en)

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