CN204998456U

CN204998456U - Master controller of pure electric car

Info

Publication number: CN204998456U
Application number: CN201520479342.6U
Authority: CN
Inventors: 邓召凯; 李杨; 李旭荣; 李国征
Original assignee: HI-GEN ELECTRIC VEHICLE TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: HI-GEN ELECTRIC VEHICLE TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2015-07-06
Filing date: 2015-07-06
Publication date: 2016-01-27
Anticipated expiration: 2025-07-06

Abstract

The utility model provides a master controller of pure electric car, include power module, MCU microprocessor module and input collection module, PWM output module, PWM input module, CAN communication module rather than IO input module, IO output module, the AD who is connected, CAN communication module adopts NULL TJA1052I for communication between the on -vehicle signal of solution microprocessor chip and machine controller, power management system, DCDC, automobile -used instrument, remote terminal monitored control system, automobile -used display screen. Master controller of pure electric car adopts the module integration ization design through IO input/output, PWM output, has increased vehicle control unit's interference killing feature to can reduce the external environment condition to vehicle control unit's influence, the interface resource that reduces the vehicle control unit cost and practice thrift MCU microprocessor has improved vehicle control unit's performance, has guaranteed vehicle control unit's stability and reliability, and then has guaranteed dynamic property and security that the automobile is expert at and sails the in -process.

Description

A kind of pure electric vehicle controller

Technical field

The utility model relates to a kind of electronlmobil device, especially relates to a kind of pure electric vehicle controller.

Background technology

Entire car controller is as the key control unit of pure electric automobile, need operation consciousness (starting switch, acceleration pedal, brake pedal etc.) gathering chaufeur, in conjunction with the state of each subsystem of dynamic assembly, export the on-off model such as air conditioning switch signal, BK Brake Switch signal, electric warm braw, defogger to control the various functions of car load.And export speed of a motor vehicle tach signal, torque rotary speed signal, water temperature signal, other PWM output signal of SOC signal to auto meter, so that chaufeur clearly can know vehicle driving-cycle, thus drive running car efficiently and safely.Entire car controller integrates the control technologys such as vehicle electronics, networking, informationization, intellectuality.Improve the basis that the anti-interference resistance of car load under complex environment and reliability, stability are then vehicle safety travels, but pure electric vehicle controller domestic at present mostly adopts discrete component method of designing in hardware design, so not only need a large amount of light-coupled isolation chips, and the method for designing of discrete component also brings a large amount of potential safety hazards, as long as there is other discrete component to damage, entire car controller just can be caused to run normally.

The radical function of entire car controller has: driver's operation intention assessment, call management, braking energy feedback control, error diagnostics, safety control, status surveillance, system calibrating.

In entire car controller design, IO load module, IO output module, what PWM output module and CAN communication module adopted substantially is the circuit that light-coupled isolation and discrete component design collaborated design, but light-coupled isolation has a lot of defect, the current transfer ratio that such as optocoupler has usually is uncertain, nonlinear function transmission and temperature and service life etc. problem, and IO exports and the stable of PWM output power circuit is also very important problem, and in discrete component design, modal problem is that discrete component ratio is easier to damage, such as diode, aerotron, the components and parts such as MOSFET are just easy to be damaged in big current and high-tension moment impact.

Utility model content

The utility model devises a pure electric vehicle controller for above-mentioned four problems, solve the integrated and other problems of IO load module in entire car controller, IO output module, PWM output module and CAN communication module, and effectively this four problems is improved by hardware design, its technical scheme is as described below:

A kind of pure electric vehicle controller, comprise power module, and MCU microprocessor module inputs acquisition module, PWM output module, PWM load module, CAN communication module with IO load module coupled respectively, IO output module, AD, described CAN communication module adopts integrated chip TJA1052I, for solve microprocessor chip and electric machine controller, power-supply management system, DC/DC, auto meter, remote terminal monitored control system, automobile-used read-out cab signal between communication.

Described IO output module comprises air conditioning switch, BK Brake Switch, back-up lamp switch, slug relay's switch, electric heater switch, defogger switch.

The incoming signal of described PWM load module comprises motor speed signal, vehicle speed signal.

Described PWM output module comprises speed of a motor vehicle speed gage, torque rotary speed table, water thermometer, SOC table.

Described IO load module adopts integrated chip MC33972/MC33975.

Described IO output module adopts integrated chip MC33879/MC33880.

Described PWM output module adopts integrated chip MC33879/MC33880.

Described pure electric vehicle controller, exported by IO input and output, PWM and adopt modular integrated design, add the antijamming capability of entire car controller, and the impact of external environment condition on entire car controller can be reduced, reduce entire car controller cost and save the interface resource of MCU microprocessor, improve the performance of entire car controller, ensure that stability and the reliability of entire car controller, and then ensure that automobile dynamic property in the process of moving and safety.

IO load module have employed opens switch detection interface chip MC33972/MC33975 more, this chip can detect nearly 22 tunnel exterior I O and input, communication uses SPI and microprocessor communications, so not only can meet circuit Redundancy Design, and Microprocessor Interface resource can be saved, and meet the wide region requirement of IO input voltage.

IO output module and PWM output module adopt 8 road flash/low limit pio chip MC33879/MC33880, and this chip by SPI and microprocessor communications, so not only can meet circuit Redundancy Design, and can save Microprocessor Interface resource.

CAN communication module have employed isolation high-speed CAN transceiver TJA1052I chip, and this chip carries isolation features, uses this chip not only to make CAN communication have better EMI and EMC performance, and is more suitable for automobile-used 12V or 24V electrical voltage system.

Accompanying drawing explanation

Fig. 1 is the hardware schematic diagram of described pure electric vehicle controller;

Fig. 2 is the schematic diagram of described IO load module;

Fig. 3 is the schematic diagram of IOIN switch;

Fig. 4 is the schematic diagram of described IO output module;

Fig. 5 is the schematic diagram of described PWM output module;

Fig. 6 a is the schematic diagram of described CAN first via communication module;

Fig. 6 b is the schematic diagram of described CAN second road communication module;

Fig. 6 c is the schematic diagram of described CAN the 3rd road communication module.

Detailed description of the invention

As shown in Figure 1, a kind of pure electric vehicle controller, comprises MCU microprocessor, power module, IO load module, IO output module, AD inputs acquisition module, PWM output module, PWM load module, CAN communication module.IO input/output module, PWM output module and CAN communication module carry out Integration Design, simplify schematic circuit diagram, optimize the interface resource of microprocessor, improve entire car controller performance, other devices vehicle-mounted such as CAN communication module and electric machine controller, battery management system, DC/DC, auto meter can be accomplished to isolate communication.

In the design of IO load module as shown in Figure 2, it is MC33975/MC33972 chip that multi-switch used detects interface chip, and this chip has to suppress the Multi-Switch of arousal function to detect interface, is intended to the closedown and the unlatching that detect nearly 22 switch contacts.On off state (open or close) can transfer to microprocessor (MCU) by a Serial Peripheral Interface (SPI) (SPI).In 22 switch contacts, SP0-SP7 is programmable On-off signal, here we programme these 8 pins be all high side switches amount input, other 16 SG0-SG13 be lower edge switch amount input.Employ 16 way switch in chip U11 and detect interface, wherein have 8 tunnels to be in Redundancy Design to consider, in Fig. 3, the input of IOIN on off state is through a series limiting resistor, a filter capacitor in parallel and a zener diode, directly input the On-off signal pin of MC33975, MC33975 has two power supplys, one of them is external input power VBAT_IN1, at this by two parallel filtering electric capacity, that chemical capacitor and ceramic condenser composition filter circuit carry out filtering respectively, WAKE wakes pin up and connects a pull-up resistor to VCC, when WAKE is in high level, device MC33975 is in sleep state, when there being switching value to change, then INT pin has interrupt output, then WAKE pin becomes low level, now MC33975 is in normal operating condition.In Fig. 2, MC33975 and MCU microprocessor is by SPI communication, is input to the SPI1 pin of MCU microprocessor at the SPI communication pin of MC33975 after matched resistance.

IO output module and PWM output module design in adopt multi-switch pio chip to be MC33879/MC33880 chip.Can find out in Fig. 4, Fig. 5 and have employed altogether 2 chip blocks, altogether can export 6 road flash drivings, 6 low limits, tunnel drive and four road PWM export.MC33879 chip passes through SPI mouth by matched resistance and MCU microprocessor SPI2 communication in this circuit arrangement; MCU microprocessor sends data to MC33879 by SPI2; and control MC33879 output pin; at the device that MC33879 output pin end will be driven by a protection diode protection; the micro-process of MCU, by the configuration of two pin EN and CS of MC33879, controls selection two MC33879.

CAN communication module adopts isolation high-speed CAN transceiver TJA1052I chip, TJA1052i not only provides electric shock, overvoltage, ground skew and reverse-current protection, and the integraty of signal under significantly promoting noisy electromagnetic environment, circuit board space can be reduced, improve signal performance, and improve system reliability and reduce costs, 3 tunnel CAN communication interfaces are had in Fig. 6 a-Fig. 6 c, as shown in fig. 1, three road CAN respectively with battery management system, DC/DC, electric machine controller, auto meter, automobile-used read-out, the communication of remote terminal monitored control system 3 part, the 3 road CAN schematic circuit diagram of Fig. 6 a-Fig. 6 c are just the same, TJA1052I chip has two power supplies, the VCC_MCU that one road power supply is powered in i.e. Fig. 6 a-Fig. 6 c by the micro-process power supply of MCU, this power supply is through two filter capacitor filtering, another road power supply is that external power supply VCC_CAN powers, this power supply is also through two filter capacitor filtering, at CANL and the CANH mouth of TJA1052I, access an esd protection diode and a common mode inductance, play overvoltage protection effect and anti-electromagnetic interference effect.

The entire car controller of above-described embodiment is the control core of pure electric automobile, this entire car controller is by CAN module and battery management system and electric machine controller communication, thus obtain the various data of power accumulator and motor, the maximum voltage that such as power accumulator exports, the SOC energy content of battery, motor temperature, the significant datas such as motor speed, thus car load is taken measures safely, by CAN communication, data are sent to vehicle-carrying display screen simultaneously, and by PWM, motor speed and the speed of a motor vehicle are sent to auto meter and show, IO input then can receive operating order from chaufeur as key ON signal, key STRAT signal, IO exports then can control relay, the on-off signals such as air-conditioning, AD Gather and input then can gather acceleration pedal signal, brake pedal signal, power supply voltage signal, thus allow the driving car load of driver safety.

Below be only preferred implementation of the present utility model, protection domain of the present utility model not only limitation and above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a pure electric vehicle controller, it is characterized in that: comprise power module, and MCU microprocessor module inputs acquisition module, PWM output module, PWM load module, CAN communication module with IO load module coupled respectively, IO output module, AD, described CAN communication module adopts integrated chip TJA1052I, for solve microprocessor chip and electric machine controller, power-supply management system, DC/DC, auto meter, remote terminal monitored control system, automobile-used read-out cab signal between communication.

2. the pure electric vehicle controller according to claims 1, is characterized in that: described IO output module comprises air conditioning switch, BK Brake Switch, back-up lamp switch, slug relay's switch, electric heater switch, defogger switch.

3. the pure electric vehicle controller according to claims 1, is characterized in that: the incoming signal of described PWM load module comprises motor speed signal, vehicle speed signal.

4. the pure electric vehicle controller according to claims 1, is characterized in that: described PWM output module comprises speed of a motor vehicle speed gage, torque rotary speed table, water thermometer, SOC table.

5. the pure electric vehicle controller according to claims 1, is characterized in that: described IO load module adopts integrated chip MC33972/MC33975.

6. the pure electric vehicle controller according to claims 1, is characterized in that: described IO output module adopts integrated chip MC33879/MC33880.

7. the pure electric vehicle controller according to claims 1, is characterized in that: described PWM output module adopts integrated chip MC33879/MC33880.