CN109774699A - A kind of hybrid electric vehicle control method and system based on CAN communication - Google Patents
A kind of hybrid electric vehicle control method and system based on CAN communication Download PDFInfo
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- CN109774699A CN109774699A CN201811562751.7A CN201811562751A CN109774699A CN 109774699 A CN109774699 A CN 109774699A CN 201811562751 A CN201811562751 A CN 201811562751A CN 109774699 A CN109774699 A CN 109774699A
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- 238000004891 communication Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004146 energy storage Methods 0.000 claims abstract description 20
- 230000003862 health status Effects 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 8
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000036541 health Effects 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000003993 interaction Effects 0.000 abstract description 7
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The present invention relates to a kind of hybrid electric vehicle control method and system based on CAN communication, power battery controller BMS transmits the SOC value and health status value of power battery to engine controller EMS, and engine controller EMS sends electrical machine working mode to electric machine controller BSG according to the SOC value and health status value of power battery and requests；When the SOC value of power battery reaches lower limit value, electric machine controller BSG control motor charges to power battery；Engine controller EMS sends operating mode request to DC/DC controller according to the SOC value and health status value of energy storage battery；When the SOC value of energy storage battery reaches lower limit value, DC/DC controller controls power battery and discharges to energy storage battery.The present invention realizes the signal interaction between each control unit of 48V system by CAN bus, and realization more accurately controls, and not only saves harness, but also improve reliability, reduces error rate.
Description
Technical field
The present invention relates to a kind of hybrid electric vehicle control method and system based on CAN communication.
Background technique
Increase with customer group to vehicle configuration demand, the electronic equipment on automobile is more and more, especially intelligently
The equipment of change gradually increases, and the power-supply system of 48V possesses the battery of larger capacity, can solve the existing electricity being likely to occur not
Sufficient problem；In addition, in order to meet increasingly harsh oil consumption and emission regulation demands, the simple fuel efficiency by improving engine,
Discharge standard difficult to realize, but 48V system can be by integrating more power-saving technologies, to realize reduction automobile fuel consumption.Meanwhile
48V system can also be distributed by the power of reasonable distribution motor and engine, be customers to realize stronger accelerating ability
Body, which provides, preferably accelerates experience.
CAN bus feature and application advantage: low cost；Mostly main serial data communication protocol bus；It is determined according to the ID of message
The message is received or shielded calmly, flexibly realizes various communications；High bus utilization；Message is not comprising source address or target
Location only indicates functional information, precedence information with identifier；Traffic rate is up to 1Mbps；Free of losses bus arbitration；Reliably
Error handle and error-detection mechanism, high reliablity (assuming that a vehicle for being equipped with CAN is run 2000 hours every year, total linear speed
Rate is 500kbps, 25% bus load.In this case, just have within every 1000 an error detection less than)；Node is in mistake
Accidentally serious situation, automatically exits from bus.
Existing fuel vehicle micro-hybrid system (48V) is divided into two kinds: 48V system (P0) and 48V system (P2).48V system
System (P0): motor is located on front side of engine.48V system (P2): motor is between engine and gearbox.As shown in fig. 6,48
The motor of system (P0) is in the position P0 (positioned at the front side of engine), and this position is minimum to the change of vehicle, group
It include EMS+ engine, BSG+ motor, the BMS+48V battery (power battery), DCDC+DCDC controller of integrated HCU at mechanism
(DC/DC controller) and energy storage battery (12V battery) respectively controls signal in system and is transmitted by multiple harness, and control instruction is held
It easily makes mistakes, reliability is poor, simultaneously because harness excessively increases wiring difficulty, also increases vehicle weight bearing.
Summary of the invention
Goal of the invention of the invention is to provide a kind of hybrid electric vehicle control method and system based on CAN communication, energy
Harness is enough effectively reduced, guarantees the reliability of system control.
Based on the same inventive concept, there are two independent technical solutions for present invention tool:
1, a kind of hybrid electric vehicle control method based on CAN communication, including engine, motor, power battery and energy storage battery,
It is characterized by:
SOC value and health status value of the power battery controller BMS to engine controller EMS transmission power battery, engine
Controller EMS sends electrical machine working mode request to electric machine controller BSG according to the SOC value and health status value of power battery；
When the SOC value of power battery reaches lower limit value, electric machine controller BSG control motor charges to power battery；
Engine controller EMS sends operating mode to DC/DC controller according to the SOC value and health status value of energy storage battery and asks
It asks；When the SOC value of energy storage battery reaches lower limit value, DC/DC controller controls power battery and discharges to energy storage battery.
Further, when electric machine controller BSG control motor is charged to power battery, engine controller EMS root
It according to maximum charging current and maximum charging voltage that current power battery allows, sends and instructs to electric machine controller BSG, limit electricity
The torque value and output voltage values of machine output.
Further, when the SOC value of energy storage battery is lower than lower limit value, DC/DC controller controls power battery to accumulation of energy electricity
When tank discharge, engine controller EMS permits according to current power SOC value of battery and cell health state value, current power battery
Perhaps the voltage value and current value of minimum discharge current and minimum discharge voltage, current DC/DC controller, to DC/DC controller
Instruction is sent, limits DC/DC controller in the voltage value of power battery high-voltage end and energy storage battery low-pressure end, current value.
Further, according to gas pedal and brake pedal signal, obtain driver needs engine controller EMS accordingly
Torque is sought, sends electrical machine working mode request to electric machine controller BSG；When motor is under torque control mode, motor control
Device BSG controls the torque distributed needed for motor output.
Further, when motor is under torque control mode, electric machine controller BSG controls the required distribution of motor output
When torque, engine controller EMS is according to engine operation condition, the permission ability of motor, the SOC value of power battery, to electricity
Machine controller BSG sends instruction, limits the torque value of motor output.
Further, engine controller EMS is according to accelerator pedal signal, brake pedal signal, gear signal, power electric
Pond SOC value and health status value start energy recuperation mode, send electrical machine working mode request, motor to electric machine controller BSG
Controller BSG control motor charges to power battery, i.e., converts electric energy for the kinetic energy of recycling.
Further, under energy recuperation mode, engine controller EMS sends to electric machine controller BSG and instructs, and limits electricity
The output voltage values and torque value of machine.
Further, engine controller EMS believes according to idling start and stop push button signalling, accelerator pedal signal, brake pedal
Number, gear signal and power battery SOC value, start idling start and stop mode, while transmitting idling start and stop status signal to instrument.
2. a kind of system for realizing the above method, it is characterised in that: engine controller EMS and power battery controller
BMS, electric machine controller BSG, DC/DC controller, instrument are connected by CAN communication bus.
The invention has the benefit that
The present invention realizes the signal interaction between each control unit of 48V system by CAN bus, realizes power supply managing, turns round
The control such as square distribution, energy regenerating, idling start and stop, realization more accurately control, and not only save harness, but also improve reliability, subtract
Few error rate.
Detailed description of the invention
Fig. 1 is that power battery charging of the present invention controls signal interaction schematic diagram；
Fig. 2 is power battery discharge control signal of the present invention interaction schematic diagram；
Fig. 3 is torque of the present invention distribution control signal interaction schematic diagram；
Fig. 4 is that energy regenerating of the present invention controls signal interaction schematic diagram；
Fig. 5 is idling start-up and shut-down control signal interaction schematic diagram of the present invention；
Fig. 6 is existing fuel vehicle micro-hybrid system structure diagram.
Specific embodiment
Embodiment one: the hybrid electric vehicle control method based on CAN communication
Power management control:
Power battery (48V battery) charging: as shown in Figure 1, power battery controller BMS is dynamic to engine controller EMS transmission
The SOC value and health status value of power battery, engine controller EMS is according to the SOC value of power battery and health status value to electricity
Machine controller BSG sends electrical machine working mode request；When the SOC value of power battery reaches (or close) lower limit value, motor control
Device BSG control motor processed charges to power battery, i.e. motor work is in generator mode.When charging, engine controller
The maximum charging current and maximum charging voltage that EMS allows according to current power battery send to electric machine controller BSG and instruct,
Limit the torque value and output voltage values of motor output.When the SOC value of 48V battery reaches (or close) upper limit value, according to 48V
System state in which, to request motor to be in other operating modes.
Power battery (48V battery) electric discharge: engine controller EMS is according to the SOC value and health status value of energy storage battery
Operating mode request is sent to DC/DC controller；When the SOC value of energy storage battery reaches (or close) lower limit value, DC/DC control
Device controls power battery and discharges to energy storage battery (12V battery).When electric discharge, engine controller EMS is according to current power battery
The minimum discharge current and minimum discharge voltage, current DC/DC that SOC value and cell health state value, current power battery allow
The voltage value and current value of controller send to DC/DC controller and instruct, and limit DC/DC controller in power battery high-voltage end
Voltage value, current value with energy storage battery low-pressure end.
Torque distribution control:
As shown in figure 3, engine controller EMS obtains driver's corresponding demand according to gas pedal and brake pedal signal
Torque sends electrical machine working mode request to electric machine controller BSG；When motor is under torque control mode, electric machine controller
BSG controls the torque distributed needed for motor output.When torque distributes, engine controller EMS is according to engine operation condition, electricity
Permission ability, the SOC value of power battery of machine send to electric machine controller BSG and instruct, and limit the torque value of motor output.
Energy regenerating control:
As shown in figure 4, engine controller EMS is according to accelerator pedal signal, brake pedal signal, gear signal, power battery
SOC value and health status value start energy recuperation mode, send electrical machine working mode request, motor control to electric machine controller BSG
Device BSG control motor processed charges to power battery, i.e., converts electric energy for the kinetic energy of recycling.When energy regenerating, engine
Controller EMS sends to electric machine controller BSG and instructs, and limits the output voltage values and torque value of motor.
When driven by engine motor rotates, either vehicle sliding when operating condition or user when being braked to vehicle
Operating condition, motor can enter power generation mode, in conjunction with the SOC value and health status value of 48V battery, to determine the need for pair
48V battery charges.The operating condition according to locating for vehicle, energy recovery function are divided into two kinds: sliding energy regenerating and braking energy
Recycling.
Slide energy regenerating: when user unclamps gas pedal and brake pedal, when gearbox-gear is linked into D grades, vehicle into
The kinetic energy of consumption is converted to electric energy and deposited by row sliding state under the premise of not influencing vehicle comfort and brake safe
Storage, the energy that this type can store are smaller.
Brake energy recovery: D grades are linked into when user unclamps gas pedal and brake pedal, gearbox-gear, vehicle
On-position is carried out, under the premise of not influencing vehicle comfort and brake safe, the kinetic energy of consumption is converted into electric energy and is carried out
Storage, the energy that this type can store are larger.
Idling start-up and shut-down control:
As shown in figure 5, engine controller EMS according to idling start and stop push button signalling, accelerator pedal signal, brake pedal signal,
Gear signal and power battery SOC value start idling start and stop mode, while transmitting idling start and stop status signal to instrument.
When waiting traffic lights, user presses start and stop key, and start and stop function is in standby mode, when vehicle is being linked into D grades,
User touches on the brake pedal to speed when being 0, and start and stop function activation, engine is in close state, and 48V high capacity cell is using depositing
The energy of storage maintains the normal operation of onboard electrical.When 48V system function is normal, user steps on the throttle pedal, and engine can be with
Quick start.
Above-mentioned control signal is transmitted by CAN bus.
Embodiment two: the system for realizing the above-mentioned hybrid electric vehicle control method based on CAN communication
Engine controller EMS and power battery controller BMS, electric machine controller BSG, DC/DC controller, instrument pass through CAN
Communication bus connection.
Claims (9)
1. a kind of hybrid electric vehicle control method based on CAN communication, including engine, motor, power battery and energy storage battery,
It is characterized by:
SOC value and health status value of the power battery controller BMS to engine controller EMS transmission power battery, engine
Controller EMS sends electrical machine working mode request to electric machine controller BSG according to the SOC value and health status value of power battery；
When the SOC value of power battery reaches lower limit value, electric machine controller BSG control motor charges to power battery；
Engine controller EMS sends operating mode to DC/DC controller according to the SOC value and health status value of energy storage battery and asks
It asks；When the SOC value of energy storage battery reaches lower limit value, DC/DC controller controls power battery and discharges to energy storage battery.
2. the hybrid electric vehicle control method according to claim 1 based on CAN communication, it is characterised in that: motor control
When device BSG control motor is charged to power battery, engine controller EMS is filled according to the maximum that current power battery allows
Electric current and maximum charging voltage send to electric machine controller BSG and instruct, and limit the torque value and output voltage of motor output
Value.
3. the hybrid electric vehicle control method according to claim 1 based on CAN communication, it is characterised in that: when accumulation of energy electricity
The SOC value in pond is lower than lower limit value, when DC/DC controller control power battery discharges to energy storage battery, engine controller EMS root
The minimum discharge current allowed according to current power SOC value of battery and cell health state value, current power battery and minimum electric discharge
The voltage value and current value of voltage, current DC/DC controller send to DC/DC controller and instruct, and limit DC/DC controller and exist
The voltage value of power battery high-voltage end and energy storage battery low-pressure end, current value.
4. according to claim 1 to the hybrid electric vehicle control method described in 3 any one based on CAN communication, feature exists
In: engine controller EMS obtains driver's corresponding demand torque, to motor according to gas pedal and brake pedal signal
Controller BSG sends electrical machine working mode request；When motor is under torque control mode, electric machine controller BSG controls motor
The torque distributed needed for output.
5. the hybrid electric vehicle control method according to claim 4 based on CAN communication, it is characterised in that: at motor
Under torque control mode, when electric machine controller BSG controls the torque distributed needed for motor output, engine controller EMS root
It according to engine operation condition, the permission ability of motor, the SOC value of power battery, sends and instructs to electric machine controller BSG, limit
The torque value of motor output.
6. the hybrid electric vehicle control method according to claim 5 based on CAN communication, it is characterised in that: engine control
Device EMS processed is according to accelerator pedal signal, brake pedal signal, gear signal, power battery SOC value and health status value, starting
Energy recuperation mode sends electrical machine working mode request to electric machine controller BSG, and electric machine controller BSG controls motor to power
Battery charges, i.e., converts electric energy for the kinetic energy of recycling.
7. the hybrid electric vehicle control method according to claim 6 based on CAN communication, it is characterised in that: energy regenerating
Under mode, engine controller EMS sends to electric machine controller BSG and instructs, and limits the output voltage values and torque value of motor.
8. the hybrid electric vehicle control method according to claim 7 based on CAN communication, it is characterised in that: engine control
Device EMS processed is according to idling start and stop push button signalling, accelerator pedal signal, brake pedal signal, gear signal and power battery SOC
Value starts idling start and stop mode, while transmitting idling start and stop status signal to instrument.
9. it is a kind of realize claim 1 to 8 any one the method system, it is characterised in that: engine controller EMS with
Power battery controller BMS, electric machine controller BSG, DC/DC controller, instrument are connected by CAN communication bus.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110254380A (en) * | 2019-06-12 | 2019-09-20 | 北京北汽德奔汽车技术中心有限公司 | Electricity control system, method and vehicle |
| CN112009457A (en) * | 2019-05-30 | 2020-12-01 | 联合汽车电子有限公司 | Control method and controller of hybrid power system and hybrid power system |
| CN113997924A (en) * | 2021-12-14 | 2022-02-01 | 奇瑞商用车（安徽）有限公司 | P0 structure hybrid vehicle type start-stop control system and control method thereof |
| CN114312741A (en) * | 2022-01-12 | 2022-04-12 | 东风商用车有限公司 | Method and system for performing engine thermal management based on P0 shallow mixing architecture |
| CN114347978A (en) * | 2021-12-24 | 2022-04-15 | 奇瑞汽车股份有限公司 | Battery overcurrent protection method |
| CN114475263A (en) * | 2022-03-30 | 2022-05-13 | 徐州徐工汽车制造有限公司 | Control method, vehicle control unit, control system, electric vehicle and storage medium |
| CN115230455A (en) * | 2022-07-12 | 2022-10-25 | 一汽解放汽车有限公司 | Hybrid vehicle system |
| CN115230455B (en) * | 2022-07-12 | 2024-06-04 | 一汽解放汽车有限公司 | Vehicle hybrid system |
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| CN115230455A (en) * | 2022-07-12 | 2022-10-25 | 一汽解放汽车有限公司 | Hybrid vehicle system |
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Application publication date: 20190521 |