CN203902318U

CN203902318U - Vehicle control unit of electric vehicle

Info

Publication number: CN203902318U
Application number: CN201420335372.5U
Authority: CN
Inventors: 冯坤
Original assignee: CHANGSHA XINLU SICHUANG ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: CHANGSHA XINLU SICHUANG ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2014-06-23
Filing date: 2014-06-23
Publication date: 2014-10-29
Anticipated expiration: 2024-06-23

Abstract

The utility model discloses a vehicle control unit of an electric vehicle. The vehicle control unit of the electric vehicle comprises a processor, wherein the processor is connected with a level input/output module, a fault diagnosis module, a power supply module, a D/A (Digital to Analog) module, a redundant dual-channel A/D (Analog to Digital) module, an acceleration detection module and a revolving speed detection module, and the level input/output module and the D/A module are connected with the power supply module; the revolving detection module is electrically connected with a revolving speed sensor on a wheel of the electric vehicle; the power supply module is electrically connected with a key switch of the electric vehicle. The vehicle control unit of the electric vehicle has the advantage that since the redundant dual-channel A/D module is adopted, the system reliability is improved.

Description

A kind of vehicle control unit of electric vehicle

Technical field

The utility model relates to electric vehicle engineering field, and particularly a kind of vehicle control unit of electric vehicle the utility model relates to electric vehicle engineering field, particularly a kind of vehicle control unit of electric vehicle.

Background technology

In order at utmost to reduce motor vehicle exhaust emission, to reduce the dependence to oil, electronlmobil and correlation technique thereof have become one of the research direction of popular forefront of motor field current.Electronlmobil is generally contained pure electric automobile, mixed power electric car etc., how to improve efficiency, traveling comfort, safety and the intelligent degree of electronlmobil, is the research emphasis of this technical field.

" brain " that vehicle control unit of electric vehicle is controlled as car load, it is the hardware carrier of integrated vehicle control tactics, be responsible for coordinating each ECU (Electrical Control Unit) work, realize intention and the car load efficiency optimization of chaufeur, must improve as far as possible the reliability of entire car controller, meanwhile, also need to gather various status informations and analyze, corresponding countermeasure is identified rapidly and taked to the faulty condition occurring under extreme case, otherwise may cause serious accident.

Summary of the invention

Technical problem to be solved in the utility model is for prior art deficiency, to provide a kind of vehicle control unit of electric vehicle, the reliability of raising entire car controller.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of vehicle control unit of electric vehicle, comprise treater, described treater is connected with level input/output module, fault diagnosis module, power module, D/A module, redundancy double channel A/D module, acceleration detection module, rotating speed detection module, and described level input/output module, D/A module are all connected with described power module; Described rotating speed detection module is electrically connected to the tachogen on electronlmobil wheel; Described power module is electrically connected to electronlmobil key switch.

Described level input/output module comprises the first optocoupler and the second optocoupler, and described the first optocoupler, the second optocoupler are connected with the first handover module, the second handover module respectively, and described the first handover module, the second handover module are all connected with described power module.

Described D/A module comprises the first buffer circuit, the second buffer circuit, the first active filter circuit being connected with described the first buffer circuit, the second active filter circuit being connected with described the second buffer circuit, described the first active filter circuit, the second active filter circuit are connected with the first switch, second switch respectively, and described the first switch, second switch are all connected with signal conditioning circuit; Described the first switch is connected with bleeder circuit, between the described bleeder circuit described second switch of access in parallel and described signal conditioning circuit; Described the first buffer circuit, the first active filter circuit are connected with the 3rd handover module, and described the 3rd handover module accesses described power module.

Described the first handover module, the second handover module, the 3rd handover module are the contactless switch with two contacts.

Described acceleration detection module adopts 3 axle acceleration sensors, and the X-axis of described 3 axle acceleration sensors is vertical with bodywork length direction, and Y-axis is parallel with bodywork length direction, and Z axis is perpendicular to vehicle body X-Y plane.

Described wheel speed detection module adopts signal processing chip NCV1124.

Compared with prior art, the beneficial effect that the utility model has is: the utility model adopts redundancy double channel A/D module, has improved the reliability of system.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation;

Fig. 2 is power module structure schematic diagram;

Fig. 3 is the schematic diagram of level input/output module;

Fig. 4 is redundancy double channel A/D modular construction schematic diagram;

Fig. 5 is analog output module schematic diagram.

The specific embodiment

After key switch is opened, through key switch output supply voltage V0 to controller of whole electric vehicle power module, as shown in Figure 2, by the linear stabilized power supply of power subsystem unit 1, export non-isolation 5V voltage V1 as Power of SCM System, simultaneously, the 5V voltage V2 being isolated by the isolation DC/DC output of power subsystem unit 2, the 12V voltage V3 being isolated by the isolation DC/DC output of power subsystem unit 3.The voltage of each unit output of power module is that the different electricity consumption of controller of whole electric vehicle is partly powered.

Level input/output module realizes the level signal transmission between micro controller system and external device.Accept the level signal of external device input and be translated into micro controller system pin level, the level signal of micro controller system pin output being converted into level signal the output that external device can receive simultaneously.As shown in Figure 3, input and output adopt optocoupler to isolate, the armature contact of S11, S12 switch can be selected to contact one of 2 fixed contacts or all disconnect with 2 fixed contacts, by select switch S11, S12, can isolate 5V/12V voltage and non-isolation 5V/12V switching selection to the power supply of level input/output module.By level, input, controller of whole electric vehicle can be identified outside level signal, and as brake signal, gear signal etc., meanwhile, external outputs level signals, as meter lamp control signal, air conditioning switch signal etc.

Redundancy double channel A/D module, as shown in Figure 4, by by the crucial analog signal of controller of whole electric vehicle respectively after 12 conditionings of signal condition 11, signal condition, pass through respectively passage 11, passage 12, be connected to 2 Chip Microcomputer A/D passage A/D1, A/D2, and 2 A/D passages are gathered simultaneously, both can improve sampling precision, meanwhile, when some passages break down, another passage can also normally carry out analog quantity sampling.

Analog output module (D/A module) has 2 passages, as shown in Figure 5, can select the 5V voltage of isolation or non-isolation by S20 switch, gives buffer circuit, active power filtering unit, bleeder circuit, the power supply of signal condition unit of analog output module.When selecting isolation 5V power supply, by buffer circuit 1, buffer circuit 2, realized the isolation of SCM PWM to isolation pwm signal, isolation pwm signal through buffer circuit, transfer to active power filtering module, realize isolation pwm signal to the conversion of isolation mode analog signal, bleeder circuit is adjusted the output voltage of bleeder circuit and the proportionate relationship of input voltage by the principle of electric resistance partial pressure, signal condition module is responsible for adjustment and filtering the externally output of afterbody analog signal, if select non-isolation 5V voltage, realize principle and use insulating power supply situation similar, just simulation output no longer has the feature of isolation.Under default conditions, S21 disconnects, and S22 connects, and 2 tunnels are pwm signal PWM1, PWM2 independently, after active power filtering, is delivered to signal condition unit respectively through passage 1, passage 2, finally by signal condition unit, externally exports independently analog signal of 2 tunnels.When needs 2 road outputting analog signal voltages are during strict proportional the relation, S21 can be set to be connected, S22 disconnects, PWM1 is after active power filtering 1 filtering processing, output is through passage 1 arriving signal conditioning unit, the output of active power filtering 1 is transported to bleeder circuit through S21 and carries out ratio adjustment simultaneously, and the output of bleeder circuit is delivered to signal condition unit through passage 2, finally by signal condition unit, is exported the analog signal of the 2 proportional relations in tunnel.

Acceleration detection module adopts 3 axle acceleration sensor ADXL345, and after guaranteeing that controller of whole electric vehicle is installed, the X-axis of acceleration pick-up is vertical with bodywork length direction, and Y-axis is parallel with bodywork length direction, and Z axis is perpendicular to X-Y plane.During stationary vehicle, sensor can be given 3 axial gravitational acceleration components of quadrature, can calculate the attitude of vehicle body thus, as the angle value of the residing gradient of vehicle body, same by detecting component of acceleration and the component of acceleration size of 3 orthogonal axes, also can identify whether vehicle body collision has occurred.

Wheel speed detection module, utilize reluctance type wheel speed sensors special signal processor NCV1124, the sinusoidal Variable Amplitude signal of wheel speed sensors output is changed into the square-wave pulse signal of 5V voltage, be delivered to the pin of micro controller system, micro controller system is calculated the speed of a motor vehicle according to the cymometer of square-wave pulse signal.

Communication module adopts 2 road CAN bus communications and 1 roadbed in the radio communication of GPRS.Wherein 1 road CAN adopts isolated communication, adopts ISO1050 isolated communication chip; 1 road CAN bus is non-isolated communication, adopts SN65HVD1040 communication chip.CAN bus realize controller of whole electric vehicle with other ECU (Electrical Control Unit) as communicating by letter between electric machine controller, battery management system etc.GPRS wireless communication section is mainly used in the obtaining of collection, monitoring and vehicle present position of information of vehicles, when controller of whole electric vehicle monitors vehicle and occurs collision case, can be independently by GPRS wireless communication module, to the terminal setting in advance, send emergency call information and when status information, the location information of vehicle in front.

Fault diagnosis module is for detection of the failure message of measuring, based on L9637D chip, once detect, break down, just deposit corresponding diagnostic code in memory cell, and in instrument prompting fault, fault diagnosis module comprises an external diagnosis interface that meets KWP2000 agreement, can carry out the reading of fault, clear operation by diagnosis interface.

The power supply of respectively organizing of controller of whole electric vehicle inside has power module to provide, micro controller system powers on after operation, first by bus and other ECU (Electrical Control Unit), communicate, carry out System self-test, judge whether subsystem breaks down, if trouble free, transmission level signal Ready is to instrument, light the Ready indicator lamp in instrument, prompting chaufeur, can start to drive; If failure message detected, by transmission level signal Error, arrive instrument, light Error indicator lamp, prompting fault.

After self check is passed through, controller of whole electric vehicle detects vehicle gear signal, brake signal etc. by level input/output module, by redundancy double channel A/D module, detect vehicle throttle signal, according to the throttle signal detecting, determine the driving power of demand, by CAN bus, analog output module, vehicular drive electric machine controller is exported to corresponding instruction, control vehicle operating.

When vehicle being detected in uphill starting, controller of whole electric vehicle is according to getting the acceleration information of 3 orthogonal axes and calculate vehicle ramp of living in from acceleration pick-up, and by wheel speed sensors signal, judge the motion of wheel, by brake signal, judge starting, in the time of chaufeur releasing of brake, controller of whole electric vehicle sends command signal, controls vehicular drive motor output torque, avoid by releasing of brake, within the time stepping on the throttle, occurring vehicle anti-slide.

Claims

1. a vehicle control unit of electric vehicle, comprise treater, it is characterized in that, described treater is connected with level input/output module, fault diagnosis module, power module, D/A module, redundancy double channel A/D module, acceleration detection module, rotating speed detection module, and described level input/output module, D/A module are all connected with described power module; Described rotating speed detection module is electrically connected to the tachogen on electronlmobil wheel; Described power module is electrically connected to electronlmobil key switch.

2. vehicle control unit of electric vehicle according to claim 1, it is characterized in that, described level input/output module comprises the first optocoupler and the second optocoupler, described the first optocoupler, the second optocoupler are connected with the first handover module, the second handover module respectively, and described the first handover module, the second handover module are all connected with described power module.

3. vehicle control unit of electric vehicle according to claim 2, it is characterized in that, described D/A module comprises the first buffer circuit, the second buffer circuit, the first active filter circuit being connected with described the first buffer circuit, the second active filter circuit being connected with described the second buffer circuit, described the first active filter circuit, the second active filter circuit are connected with the first switch, second switch respectively, and described the first switch, second switch are all connected with signal conditioning circuit; Described the first switch is connected with bleeder circuit, between the described bleeder circuit described second switch of access in parallel and described signal conditioning circuit; Described the first buffer circuit, the first active filter circuit are connected with the 3rd handover module, and described the 3rd handover module accesses described power module.

4. vehicle control unit of electric vehicle according to claim 3, is characterized in that, described the first handover module, the second handover module, the 3rd handover module are the contactless switch with two contacts.

5. according to the vehicle control unit of electric vehicle one of claim 1～4 Suo Shu, it is characterized in that, described acceleration detection module adopts 3 axle acceleration sensors, the X-axis of described 3 axle acceleration sensors is vertical with bodywork length direction, Y-axis is parallel with bodywork length direction, and Z axis is perpendicular to vehicle body X-Y plane.

6. vehicle control unit of electric vehicle according to claim 5, is characterized in that, described wheel speed detection module adopts signal processing chip NCV1124.