CN104184191B - A kind of electric automobile whole controls device and control method thereof - Google Patents
A kind of electric automobile whole controls device and control method thereof Download PDFInfo
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- CN104184191B CN104184191B CN201410414046.8A CN201410414046A CN104184191B CN 104184191 B CN104184191 B CN 104184191B CN 201410414046 A CN201410414046 A CN 201410414046A CN 104184191 B CN104184191 B CN 104184191B
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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
- Y02T10/72—Electric energy management in electromobility
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
A kind of electric automobile whole controls device and control method thereof, and described control device includes full-vehicle control unit, digital intelligent display screen, motor control unit, driving motor, power battery pack and battery management unit；Full-vehicle control unit is connected with digital intelligent display screen, motor control unit and battery management unit respectively by communication bus；Motor is driven to be bi-directionally connected with motor control unit by signal wire harness, power supply wire harness respectively；Battery management unit is connected with power battery pack by signal lines bundle.Battery management unit includes multiple single power battery protection circuit, low electricity alarm signal drive circuit, discharge prevention signal drive circuit and charge protection signal drive circuit, and described full-vehicle control unit includes the input of Master control chip, power supply and conditioning interface circuit, separation sensor signal input interface circuit, communication interface and digitized intelligent display screen output interface circuit.The present invention improves security performance, saves the energy, low-carbon environment-friendly.
Description
Technical field
The present invention relates to Control of Electric Vehicles field, particularly relate to a kind of electric automobile whole and control device and control method thereof.
Background technology
In recent years, urban transport problems is increasingly subject to people and pays close attention to, although automobile, motorcycle, etc. gradually popularize in the world because it has the advantage such as easy to use as walking-replacing tool, but being as city automobile, being continuously increased of motorcycle recoverable amount, the problem in terms of problem of environmental pollution and the energy is the most serious.Along with the continuous progress of novel high-energy secondary cell technology especially lithium-ion-power cell technology, battery-operated motor cycle, electric bicycle, electric bicycle, the technological development of electric recreation vehicle and popularization and application are increasingly subject to pay attention to.
The novel high-energy secondary cell such as lithium ion battery, Ni-MH battery is relative to lead-acid battery, and its energy specific density is greatly improved, and does not has environmental pollution, more and more applied, along with maturation and the expansion of market scale of technology, its price also will be greatly reduced, and will replace lead-acid battery.But owing to the novel high-energy secondary cell Property comparison such as lithium battery, Ni-MH battery enlivens; voltage, electric current and the working environment of discharge and recharge there are strict requirements; overcharge or cross to put and all can cause its permanent damage; even bring potential safety hazard; electrokinetic cell to be ensured normally provides drive energy for electric vehicle; must be equipped with full-vehicle control unit, its operation is managed and protects.Electric motor car driving and the administrative unit using lithium-ion-power cell to be electric energy in the market, shortage system designs, on the original electric motor car driver element with lead-acid battery as electric energy, merely add defencive function simply, management and protection to drive energy all use defencive function simply to complete, both by the MOSFET in battery protection unit as controlling the set of cells medium to motor conveying energy, during simultaneously too high as some monomer battery voltage in set of cells the most again or brownout, battery protection unit controls MOSFET and turns off set of cells major loop, performer with the safety of protection set of cells.This type of method is primarily present three problems:
(1) MOSFET is when big current work, easily damages because of overheated, it is impossible to long-time stable, reliably working under conditions of high current；MOSFET, when turning off set of cells major loop, because voltage is high, electric current conference produces bigger surge impact, easily damages the components and parts on directly electrical connection and electric path；Equalizing for proof load, battery protection unit, while MOSFET to be equipped with, must also be equipped with load balancing control module, and technical sophistication is relatively costly.
(2) there is no energy feedback charge protection, easily cause battery and overcharge.
(3) lack battery low-electricity quantity alarm function, be easily caused electric vehicle midway in traveling and cast anchor, affect traffic safety.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of electric automobile whole controls device and control method thereof, improves security performance, saves the energy, low-carbon environment-friendly.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of electric automobile whole controls device,
Including full-vehicle control unit, digital intelligent display screen, motor control unit, driving motor, power battery pack and battery management unit；
Full-vehicle control unit is connected with digital intelligent display screen, motor control unit and battery management unit respectively by communication bus；
Motor is driven to be bi-directionally connected with motor control unit by signal wire harness, power supply wire harness respectively；
Battery management unit is connected with power battery pack by signal lines bundle.
It is preferred that described power battery pack is consisted of serial or parallel connection multiple single power batteries.
It is preferred that described single power battery is lithium-ion-power cell or Ni-MH power cell.
Preferably; the described battery management unit being connected with power battery pack includes multiple single power battery protection circuit, low electricity alarm signal drive circuit, discharge prevention signal drive circuit and charge protection signal drive circuit, and single power battery protection circuit overcharges detection output lead, mistake puts detection output lead and low electric power detection output lead is connected with charge protection signal drive circuit, discharge prevention signal drive circuit and low electricity alarm signal drive circuit respectively.
It is preferred that each single power battery is correspondingly arranged a single power battery protection circuit in described power battery pack.
It is preferred that described driving motor is asynchronous AC motor, permagnetic synchronous motor or brshless DC motor.
It is preferred that described full-vehicle control unit includes the input of Master control chip, power supply and interface circuit, separation sensor signal input interface circuit, communication interface and digitized intelligent display screen output interface circuit；Power supply input and interface circuit, separation sensor signal input interface circuit, communication interface, digital intelligent display screen output interface circuit are connected with Master control chip respectively；Power supply input and interface circuit are connected with external power source；Separation sensor signal input interface circuit is connected with separation sensor；Communication interface is connected with battery management unit, motor control unit respectively；Digital intelligent display screen output interface circuit is connected with intelligent display screen.
It is preferred that described separation sensor includes rotating speed separation sensor, voltage separation sensor, current separation sensor and temperature separation sensor.
A kind of control method utilizing described electric automobile whole to control device, comprises the steps:
The real-time voltage value that V is cell in power battery pack is set；During charging electric vehicle, take the monomer battery voltage value that voltage in power battery pack is the highest；During electric automobile electric discharge, taking the monomer battery voltage value that voltage in power battery pack is minimum, Vmax is the charge protection magnitude of voltage that cell allows, and Vlim is cell low-voltage alarming value, and Vmin is the discharge prevention magnitude of voltage that cell allows；Vmax, Vlim, Vmin magnitude of voltage sets according to the charge-discharge characteristic of battery；
Step 1, program start；
Step 2, judge whether electric automobile is in charged state, be then execution step 3.1, otherwise perform step 3.2；
Real-time voltage value V of cell in step 3.1, acquisition power battery pack, it is judged that whether V, less than Vmax, is to perform 4.1, otherwise performs step 8；
Real-time voltage value V of cell in step 3.2, acquisition power battery pack, it is judged that whether V, more than Vmin, is then to perform step 4.1, otherwise performs step 4.2；
Step 4.1, electric automobile keep charged state；
Step 4.2, judge whether electric automobile is on-position, be then execution step 5.1, otherwise perform step 5.2；
Real-time voltage value V of cell in step 5.1, acquisition power battery pack, it is judged that whether V, less than Vmax, is to perform 4.1, otherwise performs 6.1；
Real-time voltage value V of cell in step 5.2, acquisition power battery pack, it is judged that whether V, more than Vlin, is then to perform step 6.3, otherwise performs step 6.2；
Step 6.1, electric automobile enter mechanical braking state, perform step 9；
Step 6.2, enter low electricity alert program, perform step 7；
Step 6.3, electric automobile are properly functioning, perform step 8；
Step 7, whole-control system send restriction current signal to electric machine controller, electric machine controller perform, and electric automobile enters current limliting running status；
Real-time voltage value V of cell in step 8, acquisition power battery pack, it is judged that whether V, less than Vmin, is then to perform step 9, otherwise performs step 5.2；
Step 9, judge whether electric automobile stops, be then execution step 10, otherwise perform step 4.2；
Step 10, end program.
Compared with prior art, the invention has the beneficial effects as follows:
(1) achieve the cell interconnection of the critical components such as battery management unit, motor control unit, charger, full-vehicle control unit be managed collectively, constitute the electric automobile whole control unit of control integration；
(2) power battery pack is monitored by battery management unit and manages; perform the charge and discharge protection to power battery pack; driving motor be controlled by motor control unit and manage, full-vehicle control unit performs control and the management of car load rank, improves efficiency and the reliability of system；
(3) vehicle operation alarm can be shown by digital intelligent display screen, full-vehicle control unit controls battery management unit and limits power battery pack discharge current, control motor control unit and limit driving output power of motor, tell that driver takes appropriate measures simultaneously, prevent vehicle midway from casting anchor, improve drive safety；
(4) energy feeding braking mode, effective 2 grades of system capacity management modes are used；Full-vehicle control unit performs car load level energy management, and battery management unit and electric-motor drive unit perform power battery pack respectively and drive the energy management of motor；Such as: in the case of power battery pack quantity of electric charge fully loaded, overcharging of the possible structure battery pair of energy feedback, need the battery of energy feedback charging is protected, prevent battery overcharge.
Accompanying drawing explanation
Fig. 1 is assembly of the invention overall structure schematic diagram；
Fig. 2 is the full-vehicle control unit construction principle figure of the present invention；
Fig. 3 is the control method flow chart of the present invention.
Detailed description of the invention
It is described in detail referring to the drawings below in conjunction with embodiment, in order to technical characteristic and advantage to the present invention are interpretated more in-depth.
Assembly of the invention overall structure schematic diagram is as shown in Figure 1, as shown in Figure 1, a kind of electric automobile whole controls device and is specially the electric automobile whole of control integration and controls device, and this device includes: full-vehicle control unit 1, communication bus 2, digital intelligent display screen 3, communication bus 4, other control control screen in subelement 5(such as electric air-conditioning subsystems, amusement), motor control unit 6, signal wire harness 7, drive motor 8, power supply wire harness 9, power battery pack 10, signal lines bundle 11 and battery management unit 12；Battery management unit 12 is connected with power battery pack 10 by signal lines bundle 11；Motor control unit 6 is connected with driving motor 8 by power supply wire harness 9 and signal wire harness 7；Battery management unit 12, motor control unit 6 and other control subelements 5 are connected with full-vehicle control unit 1 by communication bus 4；Full-vehicle control unit 1 is connected with digital intelligent display screen 3 by communication bus 2.
Motor control unit 6 is connected with full-vehicle control unit 1 by communication bus 4, is used for sending the information such as driving motor working current, power, temperature；Battery management unit 12 is connected with full-vehicle control unit 1 by communication bus 4, is used for sending the information such as low charge alert signal, low-voltage variation signal and high voltage protective signal.Run vehicle in full-vehicle control unit 1 and run safety and car load level energy management and control algolithm, export information by communication bus 4 and perform to motor control unit 6 and battery management unit 12.Full-vehicle control unit 1 external digital intelligent display screen 3, is used for showing vehicle operating information.
In the present invention, described power battery pack is consisted of serial or parallel connection multiple single power batteries.Described single power battery is lithium-ion-power cell or Ni-MH power cell.
As presently preferred embodiments of the present invention, the described battery management unit 12 being connected with power battery pack 10 includes multiple single power battery protection circuit, (shown low electricity is for arranging a threshold values for low electricity alarm signal drive circuit, when being then judged to low electricity less than this threshold values), discharge prevention signal drive circuit and charge protection signal drive circuit, single power battery protection circuit is by overcharging detection output lead, cross put detection output lead and low electric power detection output lead respectively with charge protection signal drive circuit, discharge prevention signal drive circuit and low electricity alarm signal drive circuit connect.In described power battery pack, each single power battery is correspondingly arranged a single power battery protection circuit.
Motor control unit 6 can be selected for be had on market and full-vehicle control unit and the motor control unit of battery management unit communication function, and motor control unit includes main control chip, power supply input circuit, E-Gas signal input interface circuit, electric brake signal input interface circuit, rotating speed, voltage, electric current, temperature signal input interface circuit, communication interface, motor control signal output interface circuit；Main control chip is additionally arranged electronic differential function algorithm software.Motor control signal output interface circuit, communication interface, rotating speed, voltage, electric current, temperature signal input interface circuit, electric brake signal input interface circuit, E-Gas signal input interface circuit.Power supply input circuit connection external power normally works for electric machine controller and provides power supply guarantee；E-Gas signal input interface circuit is connected with E-Gas, and electric machine controller input is connected with efp by E-Gas signal input interface circuit, is used for obtaining E-Gas open position signal；Electric brake signal input interface circuit is connected with electric brake pedal, and electric machine controller input is connected with electric brake pedal by electric brake signal input interface circuit, is used for obtaining electric brake open position signal；Rotating speed, voltage, electric current, temperature signal input interface circuit are connected with the various kinds of sensors of rotating speed, voltage, electric current and temperature；Electric machine controller is connected with the various kinds of sensors of rotating speed, voltage, electric current and temperature by rotating speed, voltage, electric current, temperature signal input interface circuit, is used for obtaining rotating speed, voltage, electric current and state of temperature information.The driver that above input interface circuit gathers is intended to and travel condition of vehicle information, delivers to main control chip by the on-chip bus such as data wire or SPI, I2C.Communication interface is connected with vehicle other system；Motor control signal output interface circuit is connected with motor；Electric machine controller carries out data interaction, such as whole-control system, battery management system by communication interface and vehicle other system.Master control chip is connected with motor by motor control signal output interface circuit.Such as 48v series attached brushless DC motor of electric vehicle controller, ET24350W controller for electric vehicle etc..
It is preferred that described driving motor is asynchronous AC motor, permagnetic synchronous motor or brshless DC motor.Drive motor rated power scope 300w to 15Kw, range of nominal tension 24V to 96V.
The full-vehicle control unit construction principle figure of the present invention is as in figure 2 it is shown, full-vehicle control unit 1 includes the input of Master control chip 13, power supply and conditioning interface circuit 14, separation sensor signal input interface circuit 15, communication interface 16, digital intelligent display screen output interface circuit 17；Power supply input and conditioning interface circuit 14, separation sensor signal input interface circuit 15, communication interface 16, digital intelligent display screen output interface circuit 17 are connected with Master control chip 13 respectively；Preferably, the embedded microprocessor that Master control chip 13 selects model to be STM32F205VG, Master control chip 13 is additionally arranged vehicle driving safety and controls and car load level energy management algorithm software.Power supply input and conditioning interface circuit 14, separation sensor signal input interface circuit 15, communication interface 16, digital intelligent display screen output interface circuit 17 can use with reference to corresponding parts in similar wagon control class application product.Power supply input and conditioning interface circuit 14 connect external power, and the separation sensor such as separation sensor signal input interface circuit 15 and rotating speed, voltage, electric current, temperature is connected.The travel condition of vehicle information that above input interface circuit gathers, delivers to Master control chip 13 by the on-chip bus such as data wire or SPI, I2C.Communication interface 16 and digitized intelligent display screen output interface circuit 17 are connected with other unit of vehicle and intelligent display screen respectively；Vehicle driving safety is controlled information and is exported to the execution of battery management unit, motor control unit and other subelements by communication interface 16 after Master control chip 13 vehicle driving safety control strategy computing.Energy management in vehicle travel process is exported to the execution of battery management unit, motor control unit and other subelements by communication interface 16 after being processed by the car load level energy management algorithm software in Master control chip 13.Security alarm information is exported to intelligent display screen by digital intelligent display screen output interface circuit 17 and shows.
The control method flow chart of the present invention, as it is shown on figure 3, a kind of control method utilizing described electric automobile whole to control device, comprises the steps:
The real-time voltage value that V is cell in power battery pack is set；During charging electric vehicle, take the monomer battery voltage value that voltage in power battery pack is the highest；During electric automobile electric discharge, taking the monomer battery voltage value that voltage in power battery pack is minimum, Vmax is the charge protection magnitude of voltage that cell allows, and Vlim is cell low-voltage alarming value, and Vmin is the discharge prevention magnitude of voltage that cell allows；Vmax, Vlim, Vmin magnitude of voltage sets according to the charge-discharge characteristic of battery；
Step 1, program start；
Step 2, judge whether electric automobile is in charged state, be then execution step 3.1, otherwise perform step 3.2；
Real-time voltage value V of cell in step 3.1, acquisition power battery pack, it is judged that whether V, less than Vmax, is to perform 4.1, otherwise performs step 8；
Real-time voltage value V of cell in step 3.2, acquisition power battery pack, it is judged that whether V, more than Vmin, is then to perform step 4.1, otherwise performs step 4.2；
Step 4.1, electric automobile keep charged state；
Step 4.2, judge whether electric automobile is on-position, be then execution step 5.1, otherwise perform step 5.2；
Real-time voltage value V of cell in step 5.1, acquisition power battery pack, it is judged that whether V, less than Vmax, is to perform 4.1, otherwise performs 6.1；
Real-time voltage value V of cell in step 5.2, acquisition power battery pack, it is judged that whether V, more than Vlin, is then to perform step 6.3, otherwise performs step 6.2；
Step 6.1, electric automobile enter mechanical braking state, perform step 9；
Step 6.2, enter low electricity alert program, perform step 7；
Step 6.3, electric automobile are properly functioning, perform step 8；
Step 7, whole-control system send restriction current signal to electric machine controller, electric machine controller perform, and electric automobile enters current limliting running status；
Real-time voltage value V of cell in step 8, acquisition power battery pack, it is judged that whether V, less than Vmin, is then to perform step 9, otherwise performs step 5.2；
Step 9, judge whether electric automobile stops, be then execution step 10, otherwise perform step 4.2；
Step 10, end program.
The control method of the present invention is particularly as follows: it is the real-time voltage value of cell in power battery pack that the electric automobile whole of control integration controls V shown in device power battery pack energy management workflow diagram; during charging; take the monomer battery voltage value that voltage in power battery pack is the highest; during electric discharge; take the monomer battery voltage value that voltage in power battery pack is minimum; Vmax is the charge protection magnitude of voltage that cell allows; Vlim is cell low-voltage alarming value, and Vmin is the discharge prevention magnitude of voltage that cell allows.Vmax, Vlim, Vmin magnitude of voltage sets according to the charge-discharge characteristic of the various batteries such as LiFePO4, LiMn2O4, ternary material lithium ion battery, Ni-MH battery.Such as ferric phosphate lithium ion battery, it is allowed to charging ceiling voltage, electric discharge low-voltage alarm voltage and minimum discharge voltage can be respectively set as 3.8V, 2.5V, 2.2V.In electric automobile normal course of operation, power battery pack provides electric energy to motor control unit, and motor drives electric motor car to move ahead.Battery management unit 12 detects cell running status in power battery pack 10 and set of cells in real time, battery power discharge in normal course of operation, when set of cells there being cell minimum voltage reach low charge alert voltage, i.e. V < Vlim, battery management unit 12 is sent to full-vehicle control unit 1 by 4 information of communication bus, other unit various information of full-vehicle control unit 1 comprehensive vehicle control and are exported to each subelement by communication bus 4 after car load level energy management algorithm calculation process again to perform through vehicle driving safety in Master control chip 13, exported to digital intelligent display screen 3 by communication bus 2 simultaneously and show.
Motor control unit 6 can take corresponding control strategy to limit driving electric current and the discharge current of power battery pack 10 of driving motor 8 according to the control information that full-vehicle control unit 1 provides.When power battery pack 10 is in discharge process; when having monomer battery voltage to reach low-voltage variation voltage; i.e. V < Vmin; battery management unit 12 sends low-voltage variation information by communication bus 4 to full-vehicle control unit 1; controlled motor control unit 6 by full-vehicle control unit 1 and take corresponding protective measure; such as: cut off and drive motor main circuit power supply, prevent set of cells overdischarge.During vehicle is in charging or braking energy feedback charging; when power battery pack 10 having cell charging voltage reach to allow charging ceiling voltage; i.e. V > Vmax; battery management unit 12 sends low-voltage variation information by communication bus 4 to full-vehicle control unit 1; controlled motor control unit by full-vehicle control unit 1 and take control measure; such as: forbid power battery pack is continued charging, prevent overcharge from damaging power battery pack.
The present invention is applied to light-weight electric vehicle complete vehicle and controls device, its operation principle is as follows: light-weight electric Automobile Design speed per hour 60km/h, using the DC brushless motor of rated power 7.5W, power battery pack uses the ferric phosphate lithium cell series connection of 24 120AH, rated voltage 72V.According to ferric phosphate lithium cell characteristic, monomer battery voltage high voltage protective value is set as that 3.8V, low-voltage variation value are set as that 2.5V, low charge alert voltage value are 2.8V.
In light-weight electric car running process, power battery pack 10 powers to electric automobile and each control unit, drives electric automobile to run.Battery management unit 12 monitors the status information such as each monomer battery voltage, electric current, temperature, electricity in power battery pack, being exported to full-vehicle control unit 1 by communication bus 4, full-vehicle control unit 1 is exported to digital intelligent display screen 3 by communication bus 2 and shows；The status informations such as motor control unit 6 monitoring driving motor 8 electric current, temperature, rotating speed, moment of torsion are exported to full-vehicle control unit 1 by communication bus 4, and full-vehicle control unit 1 is exported to digital intelligent display screen 3 by communication bus 2 and shows；The comprehensive battery management unit 12 of full-vehicle control unit 1, motor control unit 6 and other control subelement 5 running state information; calculation process is carried out through interior vehicle driving safety and car load level energy management strategies; exported to each control unit by communication bus 4 and perform; travelling and each unit work safety with protection vehicle, concrete control method is as follows:
1, during light-weight electric automobilism, when in power battery pack 10, some cell reaches 2.8V, battery management unit 12 sends low charge alert information by communication bus 4 to full-vehicle control unit 1, full-vehicle control unit 1 controls motor control unit 6 after control algolithm processes and performs, send audible and visual alarm signal by communication bus 2 to intelligent display screen 3 simultaneously, tell that driver takes appropriate measures, prevent vehicle midway from casting anchor, improve driving safety.After motor control unit 6 receives signal, power battery pack 10 discharge current is limited, limit and drive motor 8 output.
2, during light-weight electric automobilism; when in power battery pack 10, some monomer battery voltage reaches 2.5V; battery management unit 12 sends low-voltage variation information to full-vehicle control unit 1; full-vehicle control unit 1 controls motor control unit 6 after control algolithm processes and performs; including current limliting reduction of speed; turn off power battery pack 10 major loop, prevent electrokinetic cell overdischarge, protect cell safety.
3, during light-weight electric vehicle charging; when in power battery pack 10, some monomer battery voltage reaches high pressure 3.8V; battery management unit 12 sends high voltage protective information to full-vehicle control unit 1; full-vehicle control unit 1 charge closing machine also automatically cuts off coupling of power battery pack 10 and charger, prevents battery overcharge.
4, during light-weight electric automobile brake; energy feedback can be realized; in the case of power battery pack 10 quantity of electric charge fully loaded; overcharging of the possible structure battery pair of energy feedback; need the battery of energy feedback charging is protected; its method is when in power battery pack 10, some monomer battery voltage reaches 3.8V; battery management unit 12 sends high voltage protective information to full-vehicle control unit 1; full-vehicle control unit 1 controls motor control unit 6 and takes corresponding measure; no longer carry out energy feedback charging to power battery pack 10, prevent battery overcharge.
By the technical scheme in above example, the present invention is carried out clear, complete description, it is clear that described embodiment is the embodiment of a present invention part rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Claims (7)
1. an electric automobile whole controls device, it is characterised in that:
Including full-vehicle control unit, digital intelligent display screen, motor control unit, driving motor, power battery pack and battery management unit；
Full-vehicle control unit is connected with digital intelligent display screen, motor control unit and battery management unit respectively by communication bus；
Motor is driven to be bi-directionally connected with motor control unit by signal wire harness, power supply wire harness respectively；
Battery management unit is connected with power battery pack by signal lines bundle；
Described full-vehicle control unit includes the input of Master control chip, power supply and interface circuit, separation sensor signal input interface circuit, communication interface and digitized intelligent display screen output interface circuit；Power supply input and interface circuit, separation sensor signal input interface circuit, communication interface, digital intelligent display screen output interface circuit are connected with Master control chip respectively；
Separation sensor signal input interface circuit is connected with separation sensor, and described separation sensor includes rotating speed separation sensor, voltage separation sensor, current separation sensor and temperature separation sensor；
This electric automobile whole controls the control method of device and comprises the following steps that
The real-time voltage value that V is single power battery in power battery pack is set；During charging electric vehicle, take the single power battery magnitude of voltage that voltage in power battery pack is the highest；During electric automobile electric discharge; take the single power battery magnitude of voltage that voltage in power battery pack is minimum; Vmax is the charge protection magnitude of voltage that single power battery allows, and Vlim is single power battery low-voltage alarming value, and Vmin is the discharge prevention magnitude of voltage that single power battery allows；Vmax, Vlim, Vmin magnitude of voltage sets according to the charge-discharge characteristic of battery；
Step 1, program start；
Step 2, judge whether electric automobile is in charged state, be then execution step 3.1, otherwise perform step 3.2；
Real-time voltage value V of single power battery in step 3.1, acquisition power battery pack, it is judged that whether V, less than Vmax, is to perform 4.1, otherwise performs step 8；
Real-time voltage value V of single power battery in step 3.2, acquisition power battery pack, it is judged that whether V, more than Vmin, is then to perform step 4.1, otherwise performs step 4.2；
Step 4.1, electric automobile keep charged state；
Step 4.2, judge whether electric automobile is on-position, be then execution step 5.1, otherwise perform step 5.2；
Real-time voltage value V of single power battery in step 5.1, acquisition power battery pack, it is judged that whether V, less than Vmax, is to perform 4.1, otherwise performs 6.1；
Real-time voltage value V of single power battery in step 5.2, acquisition power battery pack, it is judged that whether V, more than Vlin, is then to perform step 6.3, otherwise performs step 6.2；
Step 6.1, electric automobile enter mechanical braking state, perform step 9；
Step 6.2, enter low electricity alert program, perform step 7；
Step 6.3, electric automobile are properly functioning, perform step 8；
Step 7, full-vehicle control unit send restriction current signal to motor control unit, motor control unit perform, and electric automobile enters current limliting running status；
Real-time voltage value V of single power battery in step 8, acquisition power battery pack, it is judged that whether V, less than Vmin, is then to perform step 9, otherwise performs step 5.2；
Step 9, judge whether electric automobile stops, be then execution step 10, otherwise perform step 4.2；
Step 10, end program.
Electric automobile whole the most according to claim 1 controls device, it is characterised in that: described power battery pack is consisted of serial or parallel connection multiple single power batteries.
Electric automobile whole the most according to claim 2 controls device, it is characterised in that: described single power battery is lithium-ion-power cell or Ni-MH power cell.
Electric automobile whole the most according to claim 3 controls device; it is characterized in that: the described battery management unit being connected with power battery pack includes multiple single power battery protection circuit, low electricity alarm signal drive circuit, discharge prevention signal drive circuit and charge protection signal drive circuit, single power battery protection circuit overcharges detection output lead, mistake puts detection output lead and low electric power detection output lead is connected with charge protection signal drive circuit, discharge prevention signal drive circuit and low electricity alarm signal drive circuit respectively.
Electric automobile whole the most according to claim 4 controls device, it is characterised in that: in described power battery pack, each single power battery is correspondingly arranged a single power battery protection circuit.
Electric automobile whole the most according to claim 1 controls device, it is characterised in that: described driving motor is asynchronous AC motor, permagnetic synchronous motor or brshless DC motor.
Electric automobile whole the most according to claim 1 controls device, it is characterised in that:
The input of described power supply and interface circuit are connected with external power source；Communication interface is connected with battery management unit, motor control unit respectively；Digital intelligent display screen output interface circuit is connected with intelligent display screen.
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| CN107689655A (en) * | 2017-09-08 | 2018-02-13 | 代炎利 | The over method and overdischarge protector of a kind of battery |
| CN109466376A (en) * | 2019-01-03 | 2019-03-15 | 淮海工学院 | A kind of mine locomotive lithium battery startup power supply battery management system |
| CN111268006B (en) * | 2020-03-24 | 2021-08-27 | 浙江睿璞智能汽车股份有限公司 | Control system of electric distribution vehicle |
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| CN102709980A (en) * | 2012-06-07 | 2012-10-03 | 广州益维电动汽车有限公司 | Protective plate for series lithium battery pack based on battery protective chip |
| CN202474949U (en) * | 2012-03-09 | 2012-10-03 | 柴冬燕 | Intelligence vehicle high-voltage distribution management unit for electric vehicle |
| CN103818230A (en) * | 2014-02-26 | 2014-05-28 | 南京越博汽车电子有限公司 | AMT clutch control system and method of single-shaft parallel hybrid electric vehicle |
| CN103921691A (en) * | 2014-02-19 | 2014-07-16 | 广州益维电动汽车有限公司 | Driving circuit with electronic differential function and application of driving circuit |
| CN204089254U (en) * | 2014-08-21 | 2015-01-07 | 广州益维电动汽车有限公司 | A kind of electric automobile whole control device |
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| JP5670212B2 (en) * | 2011-01-28 | 2015-02-18 | 日立マクセル株式会社 | Battery unit |
| CN103465899B (en) * | 2013-09-23 | 2016-06-29 | 湖南南车时代电动汽车股份有限公司 | A kind of series-parallel connection car engine starts and controls system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202474949U (en) * | 2012-03-09 | 2012-10-03 | 柴冬燕 | Intelligence vehicle high-voltage distribution management unit for electric vehicle |
| CN102709980A (en) * | 2012-06-07 | 2012-10-03 | 广州益维电动汽车有限公司 | Protective plate for series lithium battery pack based on battery protective chip |
| CN103921691A (en) * | 2014-02-19 | 2014-07-16 | 广州益维电动汽车有限公司 | Driving circuit with electronic differential function and application of driving circuit |
| CN103818230A (en) * | 2014-02-26 | 2014-05-28 | 南京越博汽车电子有限公司 | AMT clutch control system and method of single-shaft parallel hybrid electric vehicle |
| CN204089254U (en) * | 2014-08-21 | 2015-01-07 | 广州益维电动汽车有限公司 | A kind of electric automobile whole control device |
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