CN104786863B - A kind of automobile three voltage power system and its control method - Google Patents
A kind of automobile three voltage power system and its control method Download PDFInfo
- Publication number
- CN104786863B CN104786863B CN201510187766.XA CN201510187766A CN104786863B CN 104786863 B CN104786863 B CN 104786863B CN 201510187766 A CN201510187766 A CN 201510187766A CN 104786863 B CN104786863 B CN 104786863B
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- transducer
- soc
- open
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention relates to a kind of for the power supply on automobile, specifically a kind of automobile three voltage power system and its control method.This system includes 12V power subsystem, 48V power subsystem, 300V power subsystem, DC/DC transducer Z1, DC/DC transducer Z2；48V power electric connection in 12V power electric connection in wherein said DC/DC transducer Z1 low-pressure end and 12V power subsystem, high-pressure side and 48V power subsystem；300V power electric connection in described DC/DC transducer Z2 low-pressure end and 48V power electric connection, high-pressure side and 300V power subsystem；Three voltage power system control methods include the preheating of power supply substep, the power source charges based on SOC and control of discharge under low temperature.The present invention be a kind of overcome that in automobile in-car low-voltage power supply circuit electric current is excessive, Engine Matching automobile three voltage power system and its control method being easily caused the problem that fuel consumption is too high and the vehicle-mounted lithium-ions battery of cold district is difficult to discharge bigger than normal.
Description
Technical field
The present invention relates to a kind of for the power supply on automobile, specifically a kind of automobile with three voltage power system and its
Control method.
Background technology
The development of automobile faces four problems at present：First is the severe situation due to energy consumption and environment, new-energy automobile
Become the important directions of future transportation development；Second is that lithium-ions battery low-temperature characteristics is poor, is not suitable at low temperature discharging；The
Three is that vehicle requires to meet dynamic property when carrying out Engine Matching, engine displacement is selected often bigger than normal, causes to send out
Motivation does not usually work in efficient operation region, and now oil consumption rate is higher；4th is that auto electric degree constantly raises, with
Corresponding be that the electrical power requirements of in-car electricity adnexa constantly rise, the electric current easily causing in low-voltage circuit is excessive.In-car low
By orthodox car, the electrical power less than 2 kilowatts rises to more than 5 kilowatts in automobile in future to piezoelectricity device general power.This is for current
The 12V low-pressure system of car will result in immense pressure, and than during if desired for 2 kilowatts of power, the electric current flowing through 12V power supply reaches
166A；And during if necessary to 5 kilowatts of power, the electric current flowing through 12V power supply is up to 416A.In general, when electric current exceedes
After 150A, energy loss on wire harness will be very big, and the now requirement to wire for the system is very high, cause wire harness cost rapid on
Rise.
Content of the invention
The present invention provides a kind of automobile three voltage power system and its control method for the problems referred to above, overcomes vapour
In car in-car low-voltage power supply circuit, electric current is excessive, electromotor is because matching problem leads to fuel consumption too high and cold district
Vehicle-mounted lithium-ions battery is difficult to the problem discharged, and contributes to the development of new-energy automobile.
Technical solution of the present invention is described as follows with reference to Figure of description：
A kind of automobile three voltage power system, this system includes 12V power subsystem, 48V power subsystem, 300V power supply list
Unit, DC/DC transducer Z1, DC/DC transducer Z2；In wherein said DC/DC transducer Z1 low-pressure end and 12V power subsystem
48V power electric connection in 12V power electric connection, high-pressure side and 48V power subsystem；Described DC/DC transducer Z2 low-pressure end
With the 300V power electric connection in 48V power electric connection, high-pressure side and 300V power subsystem；Described 12V power supply, 48V power supply,
It is to be connected by CAN between 300V power supply, DC/DC transducer Z1, DC/DC transducer Z2 and master controller.
Described 12V power subsystem includes 12V power supply, load F1, inessential load F2, normally closed type switch S4, open in usual
Switch S7, resistance wire R1, Hall-type current sensor C1；Described 48V power subsystem includes 48V power supply, load F3, open in usual
Switch S5, switch S8 open in usual, resistance wire R2, Hall-type current sensor C2；Described 300V power subsystem includes 300V electricity
Source, load F4, switch S6 open in usual, Hall-type current sensor C3, electromotor G5；Wherein said DC/DC transducer Z1 is low
Pressure side and 12V power electric connection, high-pressure side and 48V power electric connection；Described DC/DC transducer Z2 low-pressure end and 48V power supply
Connect, high-pressure side is connected with 300V power supply；
Described 12V positive source is electrically connected load F1, the low-pressure end of inessential load F2, DC/DC transducer Z1
Positive pole, switch S7 open in usual；Hall-type current sensor C1 is enclosed within the external total wire harness of 12V positive source, and 12V power cathode divides
The F1 other end electricity Lian Jie not loaded, normally closed type switchs the low-pressure end negative pole of S4, DC/DC transducer Z1, one end of resistance wire R1, its
In inessential load F2 and normally closed type switch S4 be connected, switch S7 open in usual is connected with resistance wire R1；
Described 48V positive source electrically connects switch S5 one end open in usual, and the other end of switch S5 open in usual is electrically connected respectively
The high-pressure side positive pole meeting DC/DC transducer Z1, the low-pressure end positive pole loading F3, DC/DC transducer Z2, switch S8 open in usual；Suddenly
Your formula current sensor C2 is enclosed within the external total wire harness of 48V positive source；48V power cathode is electrically connected DC/DC transducer
The high-pressure side negative pole of Z1, the load F3 other end, the low-pressure end negative pole of DC/DC transducer Z2, one end of resistance wire R2；Wherein normally opened
Formula switch S8 is connected with resistance wire R2；
Described 300V positive source electrically connects switch S6 open in usual, and the switch S6 other end open in usual is electrically connected DC/
The high-pressure side positive pole of DC transducer Z2, load F4, electromotor G5；It is external that Hall-type current sensor C3 is enclosed within 300V positive source
On total wire harness；300V power cathode is electrically connected the high-pressure side negative pole of DC/DC transducer Z2, loads the another of F4 and electromotor G5
One end.
A kind of automobile control method of three voltage power system.Step includes：
Step one,
After the key of driver turn vehicle connects low tension to system, now vehicle prepares to start, and system is examined first
Survey the temperature of power supply, if temperature 48V power supply or 300V power supply is detected is less than the temperature threshold allowing corona discharge, master control
Device processed can control 12V power supply to preheat to 48V power supply, and 48V power supply preheats to 300V power supply, until temperature reaches the temperature allowing electric discharge
Till degree threshold value；If 48V power supply and 300V power source temperature are below threshold value, the heating sequence of two power supplys is：12V power supply is first
To the heating of 48V power supply, after 48V power source temperature is higher than the temperature threshold that lithium-ions battery allows electric discharge, 48V power supply passes through
Electric discharge heats to 300V power supply again；
Step 2,
After power source temperature all reaches more than threshold temperature, control system calculates the state-of-charge (SOC) of three power supplys, main
Controller controls three voltage power system to charge and discharge operation according to the SOC of power supply, and this process is can be with car
Traveling is carried out；
Step 3,
During traveling, control system calculates the demand power of vehicle, the efficacious workaround of electromotor and car in travelling
Demand power mismatch when, control system will be coordinated to determine the associated working pattern of three power supplys and electromotor；
Step 4,
Repeat step one arrives step 3, till vehicle arrives at after parking.
The concrete steps that in above-mentioned steps one, 12V power supply preheats to 48V power supply include：
1), control system constantly gathers the temperature of 48V power supply, when 48V power source temperature is less than threshold value, switch S5 open in usual
Disconnect, switch S7 closure open in usual, 12V power supply is powered to resistance wire R1, and resistance wire R1 produces the temperature that heat improves 48V power supply
Degree, that is, 12V power supply preheats to 48V power supply；
2), when 48V power source temperature reaches more than threshold temperature, the switch S5 open in usual on 48V power supply external circuitses closes
Close, now 48V power supply just has the ability of supplying power for outside, and then power to load F3 or preheat for 300V power supply, this is often
Open switch S7 disconnects, and 12V power supply stops to the preheating of 48V power supply；
The concrete steps that in above-mentioned steps one, 48V power supply preheats to 300V power supply include：
1), control system constantly gathers the temperature of 300V power supply, when 300V power source temperature is less than threshold value, switch open in usual
S6 disconnects, switch S8 closure open in usual, and 48V power supply is powered to resistance wire R2, and resistance wire R2 produces heat and improves 300V power supply
Temperature, that is, 48V power supply 300V power supply is preheated；
2) the switch S6 open in usual, when 300V power source temperature reaches more than threshold temperature, on 300V power supply external circuitses
Closure, now 300V power supply just has the ability of supplying power for outside, and then powers to load F4, and now switch S8 open in usual disconnects,
48V power supply stops to the preheating of 300V power supply.
When the SOC of 12V power supply is less than threshold value, opens DC/DC transducer Z1 and be charged, energy flows to from 48V power supply
12V power supply, and when the SOC of 12V power supply reaches 90%, DC/DC transducer Z1 quits work；When the SOC of 48V power supply is less than threshold value
When, open DC/DC transducer Z2 and be charged, energy flows to 48V power supply from 300V power supply, and the SOC of 48V power supply reaches 90%
When, DC/DC transducer Z2 quits work；When the SOC of 300V power supply is less than threshold value, opens electromotor G5 and be charged, energy
Flow to 300V power supply from electromotor G5, and when the SOC of 300V power supply reaches 90%, electromotor G5 quits work；During this,
DC/DC transducer Z1, DC/DC transducer Z2 is opened and closed by the SOC value control of low-pressure end power supply.
During vehicle braking, the kinetic energy of Some vehicles can be converted into electric energy, and 300V power supply can receive and store the regeneration of vehicle
Braking energy；In this course, if the SOC of 300V power supply reaches more than 95% because reclaiming braking energy, DC/DC changes
Device Z2 may turn on, and then gives 48V power source charges, and energy flows to 48V power supply from 300V power supply, when the SOC of 300V power supply drops to
When less than 95%, DC/DC transducer Z2 closes；If the SOC of 48V power supply reaches 95%, DC/DC, transducer Z1 can open, and enters
And give 12V power source charges, energy flows to 12V power supply from 48V power supply, and when the SOC of 48V power supply drops to below 95%, DC/DC turns
Parallel operation Z1 closes；During this, DC/DC transducer Z1, DC/DC transducer Z2 is opened by the SOC value control of high-pressure side power supply
With closing.
When the SOC of 12V power supply reaches 98%, DC/DC transducer Z1 quits work；When the SOC of 48V power supply reaches 98%
When, DC/DC transducer Z2 quits work；When the SOC of 300V power supply reaches 98%, battery no longer receives regenerating braking energy；
During this, DC/DC transducer Z1, DC/DC transducer Z2 is opened and closed by the SOC value control of low-pressure end power supply, 300V
The Brake energy recovery circuit of power supply is controlled by its SOC, after the SOC of 300V power supply is more than 98%, only allows 300V power supply to put
Electricity, does not allow to charge.
When the SOC of 12V power supply is in more than high threshold it is believed that the electricity of 12V power supply is in sufficient state, can be normal
Carry out discharge operation；When the SOC of 12V power supply is between Low threshold and high threshold, 12V power supply is in light power shortage state, control
System start-up DC/DC transducer Z1 processed carries out 48V power supply to the operation of 12V power source charges；When the SOC of 12V power supply is in low threshold
When value is following, 12V power supply is in serious power shortage state, the output of power supply to be limited, and disconnects normally closed type switch S4, and isolation is non-
Necessary load F2 is it is ensured that the electricity supply of necessary load；
When the SOC of 48V power supply is located at more than high threshold it is believed that 48V power supply is in electricity abundance state, can normally enter
Row discharge operation；When the SOC of 48V power supply is between low valve valve and high threshold values, 48V power supply is in light power shortage state, controls
System start-up DC/DC transducer Z2 carries out the operation to 48V power source charges for the 300V power supply；When the SOC of 48V power supply is in low valve valve
When following, 48V power supply is in serious power shortage state it is necessary to carry out the Power Limitation of fractional load；
When the SOC of 300V power supply is in more than high threshold values it is believed that 300V power supply is in electricity abundance state, can be normal
Carry out discharge operation, and will not starter-generator G5 generate electricity；When the SOC of 300V power supply is between low valve valve and high threshold values
When, 300V power supply is in light power shortage state it is necessary to supplement electricity by controlling electromotor to carry out generating operation to high-tension battery group
Energy；When 300V high voltage power supply SOC is in below Low threshold it is necessary to carry out the restriction of bearing power.
The invention has the beneficial effects as follows：
1st, the present invention three power supply and DC/DC design of control method, are by step heating, to realize under cold environment to lithium
The protection of ion accumulator, prevents lithium-ions battery low temperature discharge and then affects the service life of battery, 12V lead-acid battery is
48V lithium-ions battery is heated, and 48V lithium-ions battery is that 300V high-tension battery group heats；Consider that 12V lead-acid battery is low
Warm flash-over characteristic well but finite capacity feature, by multiple step format heating means, realize the raising of integral energy utilization ratio.
2nd, the present invention passes through the electric pressure of part low pressure components of upgrading, that is, increase a 48V power supply, shares former 12V electricity
The power supply pressure in source, reduces the current value in low-voltage power supply system, realizes the reasonable control of low-voltage power supply system.Dynamic for mixing
In power automobile, electromotor, clutch, change speed gear box, power transmission shaft, main reducing gear and half-bridge etc. are the dynamic of traditional driving automotive wheel
Force system, and the dynamical system being herein equipped with one group of high-tension battery and motor as second set of driving automotive wheel to increase
The peak power that vehicle can reach.A kind of vehicle power comprising three voltage power system configuration so can be realized, exist
High voltage power battery, 48V battery and three power supplys of 12V low tension battery, can reduce engine specifications during entire vehicle design,
Reduce discharge capacity, realize saving the purpose of fuel oil；By the SOC feedback control of DC/DC transducer high and low pressure side power supply, realize
Both ensured that power supply had the electric energy of abundance, power supply overcharge can have been prevented again, extended battery life.
3rd, the present invention passes through the Power Limitation based on SOC for three power supplys, limits bearing power or isolation load, is conducive to each
Individual power supply energy is quickly supplemented, and extends the service life of power supply simultaneously.
Brief description
Fig. 1 is the principle schematic of the present invention three voltage power system；
Fig. 2 a is DC/DC transducer schematic diagram of the present invention；
Fig. 2 b is the principle schematic of present invention switch open in usual；
Fig. 2 c is the principle schematic of normally closed type switch of the present invention；
Fig. 3 is the connection diagram of the present invention three voltage power system, where the dotted line signifies that holding wire, and solid line represents energy
Flowing；
Fig. 4 is the present invention three voltage power system control method flow chart；
Fig. 5 a is the control flow chart based on temperature for the 48V power supply of the present invention；
Fig. 5 b is the control flow chart based on temperature for the 300V power supply of the present invention；
Fig. 6 a is the charge and discharge control flow chart of 12V power supply of the present invention；
Fig. 6 b is the charge and discharge control flow chart of 48V power supply of the present invention；
Fig. 6 c is the charge and discharge control flow chart of 300V power supply of the present invention；
Fig. 7 is the control method that 300V power supply intervention of the present invention drives.
Specific embodiment
Refering to Fig. 1, Fig. 3, a kind of automobile three voltage power system, this system includes 12V power subsystem, 48V power supply list
Unit, 300V power subsystem, DC/DC transducer Z1, DC/DC transducer Z2；Wherein said DC/DC transducer Z1 low-pressure end with
48V power electric connection in 12V power electric connection in 12V power subsystem, high-pressure side and 48V power subsystem；Described DC/DC
300V power electric connection in transducer Z2 low-pressure end and 48V power electric connection, high-pressure side and 300V power subsystem；Described
Signal interaction between 12V power supply, 48V power supply, 300V power supply, DC/DC transducer Z1, DC/DC transducer Z2 and master controller
It is by data wire, carried out with CAN network communication mode.Master controller is entire car controller, receives various signal inputs, parsing
Driver's driving intention, is responsible for onboard power systems are controlled.Sensor on master controller and car, electromagnetic relay structure
Become control system.12V power supply, 48V power supply and three kinds of power supplys of 300V power supply exist simultaneously, are changed by two voltage-dropping type DC/DC
Device forms three voltage power system.
Described 12V power subsystem includes 12V power supply, load F1, inessential load F2, normally closed type switch S4, open in usual
Switch S7, resistance wire R1, Hall-type current sensor C1；
Wherein 12V power supply is lead-acid accumulator, and capacity is 60AH, is responsible for traditional electric accessories, including light, joy
Happy stereo set, current-limiting circuit for wind-mill generator and the resistance wire R1 to the heating of 48V power supply；Bear for not interfering with traffic safety
Carry, such as entertainment sound equipment, referred to as inessential load, represented with load F2.To inessential load F2 power-off, will not shadow vehicle
Power safety, and the loss of 12V electric quantity of power supply can be reduced.The electric adnexa powered by 12V power supply for other, is referred to as
For necessary load, represented with F1.
12V positive source connects load F1, the low-pressure end positive pole of inessential load F2, DC/DC transducer Z1, normally opened respectively
Formula switchs S7；12V power cathode connects the load F1 other end respectively, the low-pressure end of normally closed type switch S4, DC/DC transducer Z1 is born
Pole, one end of resistance wire R1；Wherein inessential load F2 and normally closed type switch S4 is connected, switch S7 open in usual and resistance wire R1 phase
Even；Connected mode is all electrical connection.Hall-type current sensor C1 is enclosed within the external total wire harness of 12V positive source, is not series connection
In circuit.
Described 48V power subsystem includes 48V power supply, load F3, switch S5 open in usual, switch S8 open in usual, resistance wire
R2, Hall-type current sensor C2；
Wherein 48V power supply is lithium-ions battery, and capacity is 20AH, is responsible for vehicle active chassis system, electronic sky
The part such as the air compressor adjusted and the resistance wire R2 to the heating of 300V power supply is powered.Wherein, the portion that these are powered by 48V power supply
Part load F3 represents.
Described 48V positive source connects switch S5 one end open in usual, and the switch S5 other end open in usual connects DC/DC respectively
The high-pressure side positive pole of transducer Z1, load F3 one end, the low-pressure end positive pole of DC/DC transducer Z2, switch S8 open in usual；48V electricity
Source negative pole connects the high-pressure side negative pole of DC/DC transducer Z1, the load F3 other end respectively, and the low-pressure end of DC/DC transducer Z2 is born
Pole, one end of resistance wire R2, switch S8 and resistance wire R2 wherein open in usual is electrically connected.Connected mode is all electrical connection.Hall-type
Current sensor C2 is enclosed within the external total wire harness of 48V positive source, is not to connect in circuit.
Described 300V power subsystem includes 300V power supply, load F4, switch S6 open in usual, Hall-type current sensor
C3, electromotor G5；
Wherein 300V power supply is high pressure lithium-ions battery, and capacity is 35AH, is responsible for powering to motor, and recovery vehicle
Brake when braking energy.Wherein motor load F4 represents.
300V positive source connects switch S6 one end open in usual, and the switch S6 other end open in usual connects DC/DC conversion respectively
The high-pressure side positive pole of device Z2, load F4, electromotor G5, the high-pressure side that 300V power cathode connects DC/DC transducer Z2 respectively is born
Pole, the other end of load F4 and electromotor G5, connected mode is all electrical connection.Hall-type current sensor C3 is enclosed within 300V power supply
On the external total wire harness of positive pole, it is not to connect in circuit.
The model Honeywell CSLA2EL that Hall-type current sensor C1, C2, C3 adopt, it can will be entangled
Wire harness on the transient current that flows through measure and be sent in master controller.For the switch in loop, it is all series connection
In circuit.
DC/DC transducer Z1 and the schematic diagram of DC/DC transducer Z2 refering to Fig. 2 a, both end of which connect be respectively
Low-voltage circuit and high-tension circuit, the circuit at two ends is all DC circuit, and DC/DC transducer Z1 and DC/DC transducer Z2 is exactly negative
Unidirectional current is transformed into another electric pressure from an electric pressure by duty, can detect and transmit the real-time voltage of height pressure side
Value.DC/DC transducer Z1 and Z2 using in the present invention is all voltage-dropping type DC/DC transducer, that is, the unidirectional current of high voltage
Change into the unidirectional current of low voltage, the model that DC/DC transducer Z1 selects is MDK500-48S24, DC/DC transducer Z2 selects
Model is MDM600-300S48.
The principle schematic of switch open in usual refering to Fig. 2 b, switch S5, S6, the S7 open in usual using in the present invention and
S8 is all realized by electromagnetic relay open in usual, and g, m port of relay connects low-voltage control circuit, and 1,2 ports connect reality
Controlled circuit, realize between g, m port the control of high-tension circuit between low-voltage control circuit is for 1,2 ports.When g, m port is obstructed
When electric, relay is in original state, and that is, the circuit between 1,2 ports is off；When g, m port is energized, relay
1st, the circuit between 2 ports is in an ON state.The low-voltage control circuit that g, m port connects is vehicle-mounted 5V voltage signal, by main control
Device sends.
It is the principle schematic of normally closed type switch refering to Fig. 2 c, the normally closed type switch S4 using in the present invention is by normal
Enclosed electromagnetic relay is realized, and g, m port of relay connects low-voltage control circuit, and 1,2 ports connect the controlled circuit of reality, real
The control of high-tension circuit between low-voltage control circuit is for 1,2 ports between existing g, m port.When g, m port no power, at relay
In original state, that is, the circuit between 1,2 ports is in an ON state；When g, m port is energized, the electricity between relay 1,2 ports
Road is off.The low-voltage control circuit that g, m port connects is vehicle-mounted 5V voltage signal, is sent by master controller.
It is the signal transmission schematic diagram of three power-supply systems refering to Fig. 3,12V power supply, 48V power supply, 300V power supply, DC/DC turns
Parallel operation Z1, DC/DC transducer Z2 is connected with CAN with master controller, and the connectivity port of employing is all that the RS232 of 9 cores connects
Mouthful, i.e. the DB9 interface of standard.In CAN, the information of transmission has：The temperature of three power supplys, electric current, information of voltage, DC/DC turn
The control word information of parallel operation Z1, DC/DC transducer Z2, i.e. dutycycle.Where the dotted line signifies that holding wire, uses CAN
Transmission signal；Solid line represents energy Flow circuit, and connected mode is electrical connection.
Refering to Fig. 4, a kind of automobile control method of three voltage power system, its step includes：
Step one, when driver turn vehicle key to system connect low tension after, now vehicle prepare start, system
Detect the temperature of power supply first, allow 12V power supply low temperature discharge herein, therefore only need to detect 48V power supply and 300V power supply
Temperature；If temperature is relatively low, do not reach the temperature threshold allowing corona discharge, power supply will enter the temperature control of substep preheating
Link, is preheated to 48V power supply by 12V power supply, after 48V power source temperature rises to threshold temperature, 12V power supply stops to 48V
Power supply preheats, and now 48V power supply just has discharge capability, powers to the load F3 being connected to 48V power supply, if detected simultaneously
The temperature of 300V power supply is less than threshold value, and 48V power supply can be to the preheating of 300V power supply, when 300V power source temperature rises to threshold temperature
Afterwards, 48V power supply stops preheating to 300V power supply, and now 300V power supply just has discharge capability；If 48V power supply and 300V power supply
Temperature is below threshold value, and the heating sequence of two power supplys is：12V power supply heats first to 48V power supply, until 48V power source temperature is high
After the temperature threshold of the suitable electric discharge of lithium-ions battery, 48V power supply passes through electric discharge and heats to 300V power supply；
Step 2, after power source temperature all reaches more than threshold temperature, control system calculate three power supplys SOC, master control
Device processed controls three voltage power system to charge and discharge operation according to the SOC of power supply, and this process is can be with escort vehicle
Traveling is carried out；
During step 3, traveling, control system calculates the demand power of vehicle, the efficient operation of electromotor in travelling
When the demand power of area and vehicle mismatches, control system will be coordinated to determine the associated working mould of three power supplys and electromotor
Formula；
Step 4, repeat step one arrive step 3, till vehicle arrives at after parking.
The concrete steps that in above-mentioned steps one, 12V power supply preheats to 48V power supply include：
1), control system constantly gathers the temperature of 48V power supply, when 48V power source temperature is less than threshold value, switch S5 open in usual
Disconnect, switch S7 closure open in usual, 12V power supply is powered to resistance wire R1, and resistance wire R1 produces the temperature that heat improves 48V power supply
Degree, that is, 12V power supply preheats to 48V power supply；
2), when 48V power source temperature reaches more than threshold temperature, the switch S5 open in usual on 48V power supply external circuitses closes
Close, now 48V power supply just has the ability of supplying power for outside, and then power to load F3 or preheat for 300V power supply, this is often
Open switch S7 disconnects, and 12V power supply stops to the preheating of 48V power supply；
The concrete steps that in above-mentioned steps one, 48V power supply preheats to 300V power supply include：
1), control system constantly gathers the temperature of 300V power supply, when 300V power source temperature is less than threshold value, switch open in usual
S6 disconnects, switch S8 closure open in usual, and 48V power supply is powered to resistance wire R2, and resistance wire R2 produces heat and improves 300V power supply
Temperature, that is, 48V power supply 300V power supply is preheated；
2) the switch S6 open in usual, when 300V power source temperature reaches more than threshold temperature, on 300V power supply external circuitses
Closure, now 300V power supply just has the ability of supplying power for outside, and then powers to load F4, and now switch S8 open in usual disconnects,
48V power supply stops to the preheating of 300V power supply.
It is the 48V power supply and 300V power supply control flow chart based on temperature in three power-supply systems refering to Fig. 5 a and 5 b.
With regard to heating and temperature control, the method using substep preheating is carried out.Make full use of lead-acid battery low-temperature characteristics good, but energy
Density is little, and lithium-ions battery low-temperature characteristics is poor, but the high feature of energy density.Working environment quilt when lithium-ions battery
Carry out discharge operation again after being preheating to suitable temperature, the discharging efficiency of power supply can be improved, and then the overall energy improving automobile
Amount utilization ratio.With regard to the suitable temperature threshold of lithium-ions battery, specifically determined by the material of lithium-ions battery.In resistance
In the selection of silk, resistance wire R1 selects the resistance wire that heating power is 1kW, and resistance wire R2 selects the resistance that heating power is 3kW
Silk, the power of resistance wire should not select too high, prevents the internal hot-spot of battery bag.Temperature control in Fig. 5 a 5b of the present invention
So that temperature threshold is set to 5 degrees Celsius as a example illustrate in flow chart：
It is the control flow chart based on temperature for the 48V power supply refering to Fig. 5 a, control system constantly gathers the temperature of 48V power supply
Degree, when 48V power source temperature is less than threshold value, switch S5 open in usual remains open, switch S7 closure open in usual, and 12V power supply is to 48V
Power supply is preheated.12V power supply is powered to resistance wire R1, and resistance wire R1 produces the temperature that heat improves 48V power supply.When 48V electricity
When source temperature reaches more than threshold temperature, the switch S5 open in usual on 48V power supply external circuitses in Fig. 1 closes, now 48V power supply
Just there is the ability of supplying power for outside, and then power to load F3 or preheat for 300V power supply.Now switch S7 open in usual disconnects,
12V power supply stops preheating to 48V power supply.
It is the control flow chart based on temperature for the 300V power supply refering to Fig. 5 b, control system constantly gathers the temperature of 300V power supply
Degree, when 300V power source temperature is less than threshold value, switch S6 open in usual remains open, switch S8 closure open in usual, 48V power supply pair
300V power supply is preheated.48V power supply is powered to resistance wire R2, and resistance wire R2 produces the temperature that heat improves 300V power supply.When
When 300V power source temperature reaches more than threshold temperature, the switch S6 open in usual on 300V power supply external circuitses in Fig. 1 closes, now
300V power supply just has the ability of supplying power for outside, and then powers to load F4.Now switch S8 open in usual disconnects, and 48V power supply stops
Only to the preheating of 300V power supply.Using the feature of each power supply, by multiple step format warm-up control, realize the efficient utilization of energy.
Temperature threshold in warm-up control in the present invention, has been set to 5 degrees Celsius, but is not limited to listed concrete temperature
Angle value, specifically can adjust according to practical situation.
Charge control method in the present invention includes three parts：
(1), when the SOC of 12V power supply is less than threshold value, open DC/DC transducer Z1 and be charged, energy is from 48V power supply
Flow to 12V power supply, and when the SOC of 12V power supply reaches 90%, DC/DC transducer Z1 quits work；When the SOC of 48V power supply is less than
During threshold value, open DC/DC transducer Z2 and be charged, energy flows to 48V power supply from 300V power supply, and the SOC of 48V power supply reaches
When 90%, DC/DC transducer Z2 quits work；When the SOC of 300V power supply is less than threshold value, opens electromotor G5 and be charged,
Energy flows to 300V power supply from electromotor G5, and when the SOC of 300V power supply reaches 90%, electromotor G5 quits work；This mistake
Cheng Zhong, DC/DC transducer Z1, DC/DC transducer Z2 is opened and closed by the SOC value control of low-pressure end power supply.
(2), during vehicle braking, the kinetic energy of Some vehicles can be converted into electric energy, and 300V power supply can receive and store vehicle
Regenerating braking energy；If in this course, the SOC of 300V power supply reaches more than 95% because reclaiming braking energy, DC/DC
Transducer Z2 may turn on, and then gives 48V power source charges, and energy flows to 48V power supply from 300V power supply, as the SOC of 300V power supply
When dropping to less than 95%, DC/DC transducer Z2 closes；If the SOC of 48V power supply reaches 95%, DC/DC, transducer Z1 will open
Open, and then give 12V power source charges, energy flows to 12V power supply from 48V power supply, when the SOC of 48V power supply drops to below 95%,
DC/DC transducer Z1 closes；During this, DC/DC transducer Z1, DC/DC transducer Z2 is subject to the SOC value control of high-pressure side power supply
System opens and closes.
(3), when the SOC of 12V power supply reaches 98%, DC/DC transducer Z1 quits work；When the SOC of 48V power supply reaches
When 98%, DC/DC transducer Z2 quits work；When the SOC of 300V power supply reaches 98%, battery no longer receives regenerative braking energy
Amount；During this, DC/DC transducer Z1, DC/DC transducer Z2 is opened and closed by the SOC value control of low-pressure end power supply,
The Brake energy recovery circuit of 300V power supply is controlled by its SOC, after the SOC of 300V power supply is more than 98%, only allows 300V electricity
Discharging in source, does not allow to charge.
Three kinds of above-mentioned charging method highest priority for (3), priority minimum for (1).It is specially：If there is
12V power supply because be constantly electrically charged, its SOC by less than 40%, when rising to 90%, now according to 1) in control method, DC/
DC transducer Z1 quits work；If now the SOC of 48V power supply makes 48V power supply because of the energy receiving 300V power supply simultaneously
SOC more than 95%, now according to 2) control mode, DC/DC transducer Z1 should open work；For reply DC/DC conversion
The phenomenon simultaneously meeting open and close condition in distinct methods in device Z1,2 defined in control method) priority height
In 1) priority, when above-mentioned situation occurring simultaneously, the high control method of execution priority, herein DC/DC transducer Z1 open
Start building to make.Then, 12V power supply, because continuing to the electricity input of 48V power supply, causes the SOC of 12V power supply constantly to raise, when
When the SOC of 12V power supply rises to 98%, meet 3) in closing DC/DC transducer Z1 condition；The priority of defined herein 3)
Higher than 2) priority, DC/DC transducer Z1 quits work, it is to avoid occur that DC/DC transducer Z1 is always on to cause 12V power supply
Excessively it is electrically charged phenomenon, prevent potential safety hazard.In the same manner, for the control of DC/DC transducer Z2, with DC/DC transducer Z1
Control consistent.If there is 48V power supply because be constantly electrically charged, its SOC by less than 40%, when rising to 90%, now root
According to 1) in control method, DC/DC transducer Z2 quits work；If simultaneously now the SOC of 300V power supply more than 95%, now
According to 2) in control mode, DC/DC transducer Z2 should open work；Occur meeting for reply DC/DC transducer Z2 simultaneously
The phenomenon of the open and close condition in distinct methods, 2 defined in control method) priority be higher than 1) priority, that is,
When above-mentioned situation occurring simultaneously, the high control method of execution priority, the work of DC/DC transducer Z2 startup herein.Then, 48V
Power supply, because continuing to the electricity input of 300V power supply, causes the SOC of 48V power supply constantly to raise, when on the SOC of 48V power supply
When being raised to 98%, meet 3) in closing DC/DC transducer Z2 condition；The priority of defined herein 3) be higher than 2) preferential
Level, DC/DC transducer Z1 quits work, it is to avoid DC/DC transducer Z2, always on to cause 48V power supply to be excessively electrically charged existing
As preventing potential safety hazard.When multiple control operations meet condition simultaneously, execute the highest priority that these meet condition
Operation.It is so to prevent from the SOC of power supply still to charge afterwards more than 98% to cause potential safety hazard for priority protection battery,
On the basis of ensureing safety, reclaim braking energy as far as possible, improve capacity usage ratio.Although the third situation seldom goes out
Existing, but this set can improve power safety.SOC threshold in charge control method in the present invention, has been set to 40%, but
It is not limited to listed concrete SOC threshold, specifically can be adjusted according to practical situation.
Discharge control method in the present invention includes three parts：
(1) when the SOC of 12V power supply is in more than high threshold, 12V electric quantity of power supply is in sufficient state, and 12V power supply is permissible
Carry out normal discharge operation；When the SOC of 12V power supply is between Low threshold and high threshold, 12V power supply is in light power shortage shape
State, control system starts DC/DC transducer Z1 and carries out 48V power supply to the operation of 12V power source charges, and now 12V power supply is still right
Outer normal power supply；When the SOC of 12V power supply is in below Low threshold, 12V power supply is in serious power shortage state, power supply to be limited
Output, by isolate inessential load F2 by way of carry out, disconnect normally closed type switch S4, cut off to inessential load F2
Power supply it is ensured that the electricity supply to necessary load for the power supply；
(2) when the SOC of 48V power supply is located at more than high threshold, 48V power supply is in electricity abundance state, and 48V power supply is permissible
Carry out normal discharge operation；When the SOC of 48V power supply is between Low threshold and high threshold, 48V power supply is in light power shortage shape
State, control system starts DC/DC transducer Z2 and carries out the operation to 48V power source charges for the 300V power supply, and now 12V power supply is still right
Outer normal power supply；When the SOC of 48V power supply is in below Low threshold, 48V power supply is in serious power shortage state it is necessary to the portion of carrying out
Divide the Power Limitation of load；
(3) when the SOC of 300V power supply is in more than high threshold, 300V power supply is in electricity abundance state, 300V power supply
Normal discharge operation can be carried out, and will not starter-generator G5 generate electricity；When the SOC of 300V power supply is in Low threshold and height
When between threshold value, 300V power supply is in light power shortage state it is necessary to carry out generating operation come to high-tension battery by controlling electromotor
Group electric energy supplement；When 300V high voltage power supply SOC is in below Low threshold it is necessary to carry out the restriction of bearing power.
The high threshold of SOC and Low threshold in discharge control method in the present invention, are set to 40% and 30%, but not office
It is limited to listed concrete SOC threshold, specifically can be adjusted according to practical situation.
Because at low ambient temperatures, lithium-ions battery is difficult to externally discharge.Although and the low-temperature characteristics of lead-acid battery is relatively
Good, but the energy density of lead-acid battery is little, and the electric energy of storage is few.Therefore, in cold district vehicle start, for lead-acid battery
The low-temperature characteristics feature better than lithium-ions battery it is allowed to lead-acid battery discharges at low temperature, that is, 12V power supply can be to load
F1 and inessential load F2 powers, and is preheated for lithium-ions battery using 12V lead-acid battery.
Therefore, after some temperature threshold of the property settings according to 48V power supply, when 48V power source temperature is less than this temperature threshold
During value, switch S7 closure open in usual, switch S5 open in usual remains open, and now 12V power supply is used to built-in heating in 48V power supply
Resistance wire R1 power, resistance wire R1 produce heat the temperature making 48V power supply is raised, when temperature reaches certain threshold value, often
Open switch S5 closes, and now 48V power supply is provided with the condition of supplying power for outside, can power to load F3, simultaneously open in usual open
Close S7 to disconnect, stop powering to resistance wire R1, to save energy.48V power supply can produce heat in electric discharge due to due to internal resistance,
It is higher than temperature threshold that this partial heat be enough to maintain the temperature of 48V power supply.Hereafter 48V power supply just can be with regular picture.In the same manner,
For 300V power supply, after some temperature threshold of the property settings according to 300V power supply, when 300V power source temperature is less than this temperature
During threshold value, switch S8 closure open in usual, switch S6 open in usual remains open, and now 48V power supply is to built-in adding in 300V power supply
The resistance wire R2 of heat powers, and the temperature of 300V power supply is improved by the heat that resistance wire R2 produces, when temperature reaches certain threshold value
When, switch S6 closure open in usual, now 300V power supply is provided with the condition of supplying power for outside, can power to load F4, with often
Open switch S8 disconnects, and stops powering to resistance wire R2, to save energy.The meeting due to due to internal resistance in electric discharge of 300V power supply
Produce heat, it is higher than temperature threshold that this partial heat be enough to maintain the temperature of 300V power supply.Hereafter 300V power supply just can normally be put
Electricity.Using above-mentioned multiple step format pre-heating mean, that is, to the preheating of 48V power supply, 48V power supply preheats 12V power supply to 300V power supply, is
Because although 12V power supply can be with low temperature discharge, the energy density of lead-acid battery is little, and the energy of storage is less, therefore can only
To the 48V power supply preheating of capacity, small volume, but cannot be to the larger 300V power supply preheating of capacity, volume.And 48V power supply is
Lithium-ions battery, energy density is big, and the energy of storage is many, can be to the preheating of 300V power supply, but premise is 48V, and power supply wants work
Make in suitable temperature.In power work, when the temperature of lithium-ions battery is again below temperature threshold, above-mentioned four are often
Open switch S5, S6, S7, S8 can repeat aforesaid operations, it is to avoid the power supply low temperature discharge situation that lithium-ions battery does
Generation, and then protect lithium-ions battery.When the SOC of 12V power supply is not enough, normally closed type switch S4 can disconnect, power-supply system
Isolate non-essential electrical equipment, that is, stop powering to inessential load F2, to ensure necessary electrical equipment as loaded F1
Need for electricity is it is thus also avoided that the rapid decline of the SOC of 12V power supply.When the SOC of 300V power supply is too low, electromotor G5 can start,
And then power to 300V power supply.When being braked energy regenerating, motor will be operated in generating state, is produced with braking
Electric energy is to 300V power source charges.
When the voltage of three power supplys reaches respective maximum voltage value, SOC is considered 100%, and that is, now power supply is in completely
Electricity condition, each power supply electrifying, master controller can be according to the magnitude of voltage of power supply, according to the supply voltage being previously stored and power supply
SOC mapping relations, to power supply SOC assignment when initial for the upper electricity, this is the correction algorithm in power supply SOC calculating process.Hereafter, main
Controller calculates the SOC value of power supply according to formula (1).Under full power state, power supply does not continue to charge, and prevents because of overcharge
Produce potential safety hazard.
The charge and discharge control of three voltage power system is that the SOC based on power supply carries out jointly controlling of three power supplys as foundation
, maximum key is as accurate as possible for the calculating of SOC.SOC computing formula (1) for three power supplys is：
Wherein, SOC2Represent the power supply SOC value of later moment in time, SOC1Represent the power supply SOC value of previous moment, t1 and t2 is
Two moment, wherein t2 moment are later than the t1 moment, and therefore t2-t1 is the time interval in two moment, in order to calculate accurately, integration
The time interval taking in algorithm should be as little as possible.I represents the electric current flowing through positive source, is by Hall-type current sensor
C1, C2, C3 record, and when power supply is in charged state, I is positive number；When power supply is in discharge condition, I is negative.Cfull
Represent power supply full electricity the moment stored by electricity, this value battery production out when just have determined.
Refering to Fig. 6 a, 6 b, 6 c be in the present invention three voltage power system based on SOC the control method to power supply,
The SOC threshold of three power supplys being related in control method, can determine according to the actual requirements, in the present invention by herein
SOC threshold is set to 40% and 30%.
It is the charge and discharge control flow chart of 12V power supply of the present invention refering to Fig. 6 a, the load F1 master being connected with this power supply
If traditional electric adnexa, including illuminator, electric heating system of entertainment systems, plug ignition system and 48V power supply etc..
When SOC is in more than 40% it is believed that now electric quantity of power supply be sufficient, power supply can be normally carried out discharge operation.But work as
Power supply SOC is in when 30% 40% it is believed that now power supply is in light power shortage state, now starts DC/DC transducer Z1 to 12V
Power supply is charged with the invariable power of 1kW, but the now still external normal power supply of 12V power supply；When SOC is less than 30%, DC/DC changes
Device Z1 continues to keep charging with 1kW invariable power to 12V power supply, thinks that now power supply is in serious power shortage state simultaneously, limit
The output of power supply, is carried out by way of isolating inessential load, only retains the normal electricity consumption of necessary load, this process
Switch S4 realization by disconnecting the normally closed type in Fig. 1.
It is the charge and discharge control flow chart of 48V power supply of the present invention refering to Fig. 6 b, the load F3 being connected with this power supply is
Active chassis system, air compressor of electric air-conditioning etc..When SOC is located at more than 40% it is believed that power supply is electricity abundance
, now power supply can be normally carried out discharge operation, when SOC is in 30% 40% it is believed that now power supply be in light power shortage
State, now starting DC/DC transducer Z2 is that 48V power supply is charged with the invariable power of 3kW, but now 48V power supply is still external just
Often power；When SOC is less than 30%, DC/DC transducer Z2 continues to keep charging with 3kW invariable power to 48V power supply, thinks simultaneously
Now power supply is in serious power shortage state, the Power Limitation of fractional load to be carried out, and such as controls air conditioning system can only operate in
Low-grade location, limits the electric power of air-conditioning, but does not interfere with the powered operation of the necessary parts such as chassis active control, to guarantee
The rigid demand of vehicle can be met.By the setting of 48V system, not only can ensure that automobile in-car low voltage equipment constantly increases
High need for electricity, and the driving of compressor of air conditioner is changed to 48V power supply by the driven by engine in orthodox car and drives.Cause
Have to consider air-conditioning when only just being used in colder or hotter environment for air-conditioning, and mating electromotor in traditional vehicle
Situation about opening, if therefore vehicle there is certain power dissipation in preference temperature downward driving.By allowing 48V power supply to drive
Dynamic air conditioning system, when carrying out Engine Matching Design, avoids the need for considering air conditioner load, can reduce the target work(of electromotor
Rate, selects the electromotor of smaller displacement, reduces the purpose of fuel consumption.
It is the charge and discharge control flow chart of 300V power supply of the present invention refering to Fig. 6 c, the load F4 being connected with this power supply is just
It is motor.When SOC is located at more than 40% it is believed that electric quantity of power supply is sufficient, now power supply can be normally carried out discharging
Operation, and electromotor G5 will not start.This can reduce the general power of the external load of electromotor conventional operational, during coupling just
The less electromotor of discharge capacity can be selected, reduce the purpose of oil consumption.When SOC is in 30% 40% it is believed that now electricity
Source is in light power shortage state it is necessary to generate electricity to high-tension battery group electric energy supplement by controlling driven by engine electromotor G5.Send out
Motivation is engaged with electromotor G5, drives electromotor G5 to rotate and generates electricity to 300V power source charges, but now 300V power supply is still external
Normal power supply.When SOC is less than 30%, now think that power supply is in serious power shortage state, now electromotor continues to drive
Electromotor, to 300V power source charges, the Power Limitation that will be loaded simultaneously, such as controls motor to can only operate in low work(
Rate state, reduces the peak power allowing motor work.
After three power supplys start to charge up, when the SOC of power supply rises to 40%, charging process can't stop at once, but
Until power supply SOC just can stop after reaching 90%, it is to avoid charging operations frequent starting, specially：For 12V power supply, its SOC
After reaching 90%, charging process just can stop, and that is, DC/DC transducer Z1 quits work.For 48V power supply, its SOC reaches 90%
Afterwards, charging process just can stop, and that is, DC/DC transducer Z2 quits work.For 300V power supply, after its SOC reaches 90%, charge
Process just can stop, and that is, electromotor G5 quits work.During this, DC/DC transducer is controlled by the SOC value of low-pressure end power supply
Open and close it is therefore an objective to the energy of abundance can be stored after the completion of ensureing three power source charges for using.
It is the control method flow chart that 300V power supply intervention of the present invention drives refering to Fig. 7.
When low power state travels, 300V power supply avoids the need for intervening work vehicle.Therefore, this three power type structures
The effect reducing engine specifications can be reached, the electromotor of automobile only needs to be operated in highly efficient power area, and work as and start
, in this operated within range, fuel consumption is low for machine.In running, control system constantly calculates the demand of vehicle to vehicle
Power, and the efficient operation interval of the electromotor that demand power is configured with vehicle contrasted.
The computing formula of the demand power being related in the present invention is (2)：
Wherein, PrequireRepresent demand power；PmaxRepresent the peak power that dynamical system can be provided by, numerically equal to
The maximum power value that can reach after electromotor and motor power coupling；DfullRepresent the maximum that gas pedal can reach
Stroke, the depth capacity that can step down；DpedalRepresent the actual depth being operated of gas pedal.
When demand power car load is detected is more than the efficient operation interval upper limit of electromotor, that is, demand power exceedes and sets
During fixed power threshold 1,300V power supply just drives motor to work, and jointly drives vehicle with electromotor, 300V power supply is permissible
Realize the effective supplement to engine power.By configuring 300V power supply, it is possible to achieve when vehicle high power travels, motor is fast
Speed incision, increases the peak power that vehicle can reach.And when car load demand power is between threshold value 1 and threshold value 2, only by
Motor-powered vehicle travels, and now motor neither provides power to driving system, also will not be dragged by electromotor and carry out
Generate electricity.If the demand power of vehicle is less than the power threshold 2 setting, that is, the power of electromotor has residue, now electromotor
Not only drive vehicle to travel, also can drag motor and generate electricity, allow motor be operated in generating state and produce electric energy, to 300V
Power source charges.Wherein threshold value 1 is more than threshold value 2, and two threshold values represent power upper limit value and the lower limit in engine high-efficiency region respectively
Value.Often a electromotor has the efficient operation of itself interval, and here is interval interior, engine mildness, and fuel consumption
Rate is relatively low, and engine high-efficiency region specific power upper limit value and lower limit are determined by the whole performance map of electromotor.Therefore
When carrying out Engine Matching it is not necessary to obtain very big by Match it is only necessary to consider that efficient operation region is covered just
The average demand power of lid vehicle, such electromotor is operated in low oil consumption power region as much as possible, reduces
Oil consumption.
Claims (5)
1. a kind of automobile with three voltage power system it is characterised in that this system include 12V power subsystem, 48V power subsystem,
300V power subsystem, DC/DC transducer Z1, DC/DC transducer Z2；Wherein said DC/DC transducer Z1 low-pressure end and 12V electricity
48V power electric connection in 12V power electric connection in source unit, high-pressure side and 48V power subsystem；Described DC/DC conversion
300V power electric connection in device Z2 low-pressure end and 48V power electric connection, high-pressure side and 300V power subsystem；Described 12V electricity
It is by CAN phase between source, 48V power supply, 300V power supply, DC/DC transducer Z1, DC/DC transducer Z2 and master controller
Even；Described 12V power subsystem includes 12V power supply, load F1, inessential load F2, normally closed type switch S4, switch open in usual
S7, resistance wire R1, Hall-type current sensor C1；Described 48V power subsystem includes 48V power supply, load F3, switch open in usual
S5, switch S8 open in usual, resistance wire R2, Hall-type current sensor C2；Described 300V power subsystem includes 300V power supply, bears
Carry F4, switch S6 open in usual, Hall-type current sensor C3, electromotor G5；Wherein said DC/DC transducer Z1 low-pressure end with
12V power electric connection, high-pressure side and 48V power electric connection；Described DC/DC transducer Z2 low-pressure end is connected with 48V power supply, height
Pressure side is connected with 300V power supply；
Described 12V positive source be electrically connected load F1, the low-pressure end positive pole of inessential load F2, DC/DC transducer Z1,
Switch S7 open in usual；Hall-type current sensor C1 is enclosed within the external total wire harness of 12V positive source, 12V power cathode electricity respectively
Connect the load F1 other end, normally closed type switchs the low-pressure end negative pole of S4, DC/DC transducer Z1, one end of resistance wire R1, wherein non-
Necessary load F2 is connected with normally closed type switch S4, and switch S7 open in usual is connected with resistance wire R1；
Described 48V positive source electrically connects switch S5 one end open in usual, and the other end of switch S5 open in usual is electrically connected DC/
The high-pressure side positive pole of DC transducer Z1, the low-pressure end positive pole of load F3, DC/DC transducer Z2, switch S8 open in usual；Hall-type electricity
Flow sensor C2 is enclosed within the external total wire harness of 48V positive source；48V power cathode is electrically connected the height of DC/DC transducer Z1
Pressure side negative pole, the load F3 other end, the low-pressure end negative pole of DC/DC transducer Z2, one end of resistance wire R2；Switch wherein open in usual
S8 is connected with resistance wire R2；
Described 300V positive source electrically connects switch S6 open in usual, and the switch S6 other end open in usual is electrically connected DC/DC and turns
The high-pressure side positive pole of parallel operation Z2, load F4, electromotor G5；Hall-type current sensor C3 is enclosed within the external bus of 300V positive source
Shu Shang；300V power cathode is electrically connected the high-pressure side negative pole of DC/DC transducer Z2, loads the another of F4 and electromotor G5
End.
2. a kind of automobile control method of three voltage power system is it is characterised in that step includes：
Step one,
After the key of driver turn vehicle connects low tension to system, now vehicle prepares to start, and system detects electricity first
The temperature in source, if temperature 48V power supply or 300V power supply is detected is less than the temperature threshold allowing corona discharge, master controller
12V power supply can be controlled to preheat to 48V power supply, 48V power supply preheats to 300V power supply, until temperature reaches the temperature threshold allowing electric discharge
Till value；If 48V power supply and 300V power source temperature are below threshold value, the heating sequence of two power supplys is：12V power supply is first given
48V power supply heats, and after 48V power source temperature is higher than the temperature threshold that lithium-ions battery allows electric discharge, 48V power supply passes through to put
Electricity heats to 300V power supply again；
Step 2,
After power source temperature all reaches more than threshold temperature, control system calculates the SOC of three power supplys, and master controller is according to power supply
SOC control three voltage power system charge and discharge operation, this process be escort vehicle travel carry out；
Step 3,
During traveling, control system calculates the demand power of vehicle, the efficacious workaround of electromotor and vehicle in travelling
When demand power mismatches, control system will be coordinated to determine the associated working pattern of three power supplys and electromotor；
Step 4,
Repeat step one arrives step 3, till vehicle arrives at after parking.
3. a kind of automobile according to claim 2 with the control method of three voltage power system it is characterised in that
The concrete steps that in described claim 2 step one, 12V power supply preheats to 48V power supply include：
1), control system constantly gathers the temperature of 48V power supply, and when 48V power source temperature is less than threshold value, switch S5 open in usual breaks
Open, switch S7 closure open in usual, 12V power supply is powered to resistance wire R1, and resistance wire R1 produces the temperature that heat improves 48V power supply,
I.e. 12V power supply preheats to 48V power supply；
2), when 48V power source temperature reaches more than threshold temperature, the switch S5 open in usual on 48V power supply external circuitses closes, this
When 48V power supply just there is the ability of supplying power for outside, and then power to load F3 or preheat for 300V power supply, now open in usual open
Close S7 to disconnect, 12V power supply stops preheating to 48V power supply；
The concrete steps that in described claim 2 step one, 48V power supply preheats to 300V power supply include：
1), control system constantly gathers the temperature of 300V power supply, and when 300V power source temperature is less than threshold value, switch S6 open in usual breaks
Open, switch S8 closure open in usual, 48V power supply is powered to resistance wire R2, and resistance wire R2 produces the temperature that heat improves 300V power supply,
I.e. 48V power supply preheats to 300V power supply；
2), when 300V power source temperature reaches more than threshold temperature, the switch S6 open in usual on 300V power supply external circuitses closes,
Now 300V power supply just has the ability of supplying power for outside, and then powers to load F4, and now switch S8 open in usual disconnects, 48V electricity
Source stops preheating to 300V power supply.
4. a kind of automobile according to claim 2 with the control method of three voltage power system it is characterised in that
In described claim 2 step 2, power source charges control and include：
When the SOC of 12V power supply is less than threshold value, opens DC/DC transducer Z1 and be charged, energy flows to 12V electricity from 48V power supply
Source, and when the SOC of 12V power supply reaches 90%, DC/DC transducer Z1 quits work；When the SOC of 48V power supply is less than threshold value, open
Open DC/DC transducer Z2 to be charged, energy flows to 48V power supply from 300V power supply, and when the SOC of 48V power supply reaches 90%,
DC/DC transducer Z2 quits work；When 300V power supply SOC be less than threshold value when, open electromotor G5 be charged, energy from send out
Motor G5 flows to 300V power supply, and when the SOC of 300V power supply reaches 90%, electromotor G5 quits work；During this, DC/
DC transducer Z1, DC/DC transducer Z2 is opened and closed by the SOC value control of low-pressure end power supply；
During vehicle braking, the kinetic energy of Some vehicles can be converted into electric energy, and 300V power supply can receive and store the regenerative braking of vehicle
Energy；In this course, if the SOC of 300V power supply reaches more than 95% because reclaiming braking energy, DC/DC transducer Z2
May turn on, and then give 48V power source charges, energy flows to 48V power supply from 300V power supply, when the SOC of 300V power supply drops to 95%
When following, DC/DC transducer Z2 closes；If the SOC of 48V power supply reaches 95%, DC/DC, transducer Z1 can open, and then gives
12V power source charges, energy flows to 12V power supply from 48V power supply, when the SOC of 48V power supply drops to below 95%, DC/DC transducer
Z1 closes；During this, DC/DC transducer Z1, DC/DC transducer Z2 is subject to the SOC value of high-pressure side power supply to control unlatching and close
Close；
When the SOC of 12V power supply reaches 98%, DC/DC transducer Z1 quits work；When the SOC of 48V power supply reaches 98%,
DC/DC transducer Z2 quits work；When the SOC of 300V power supply reaches 98%, battery no longer receives regenerating braking energy；This
During, DC/DC transducer Z1, DC/DC transducer Z2 is opened and closed by the SOC value control of low-pressure end power supply, 300V power supply
Brake energy recovery circuit controlled by its SOC, after the SOC of 300V power supply is more than 98%, only allow 300V corona discharge, no
Allow to charge.
5. a kind of automobile according to claim 2 with the control method of three voltage power system it is characterised in that described power
Profit requires corona discharge in 2 step 2 to control inclusion：
When the SOC of 12V power supply is in more than high threshold it is believed that the electricity of 12V power supply is in sufficient state, it is normally carried out discharging
Operation；When the SOC of 12V power supply is between Low threshold and high threshold, 12V power supply is in light power shortage state, and control system opens
Dynamic DC/DC transducer Z1 carries out 48V power supply to the operation of 12V power source charges；When the SOC of 12V power supply is in below Low threshold,
12V power supply is in serious power shortage state, the output of power supply to be limited, and disconnects normally closed type switch S4, isolates inessential load
F2 is it is ensured that the electricity supply of necessary load；
When the SOC of 48V power supply is located at more than high threshold it is believed that 48V power supply is in electricity abundance state, it is normally carried out electric discharge behaviour
Make；When the SOC of 48V power supply is between low valve valve and high threshold values, 48V power supply is in light power shortage state, and control system starts
DC/DC transducer Z2 carries out the operation to 48V power source charges for the 300V power supply；When the SOC of 48V power supply is in below low valve valve,
48V power supply is in serious power shortage state it is necessary to carry out the Power Limitation of fractional load；
When the SOC of 300V power supply is in more than high threshold values it is believed that 300V power supply is in electricity abundance state, it is normally carried out discharging
Operation, and will not starter-generator G5 generate electricity；When the SOC of 300V power supply is between low valve valve and high threshold values, 300V electricity
Source is in light power shortage state it is necessary to carry out generating operation come to high-tension battery group electric energy supplement by controlling electromotor；Work as 300V
High voltage power supply SOC is in during below Low threshold it is necessary to carry out the restriction of bearing power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510187766.XA CN104786863B (en) | 2015-04-20 | 2015-04-20 | A kind of automobile three voltage power system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510187766.XA CN104786863B (en) | 2015-04-20 | 2015-04-20 | A kind of automobile three voltage power system and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104786863A CN104786863A (en) | 2015-07-22 |
| CN104786863B true CN104786863B (en) | 2017-03-01 |
Family
ID=53552200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510187766.XA Expired - Fee Related CN104786863B (en) | 2015-04-20 | 2015-04-20 | A kind of automobile three voltage power system and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104786863B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738591A (en) * | 2017-11-01 | 2018-02-27 | 邱诗俊 | Batteries of electric automobile pre-heating system |
| CN107994176A (en) * | 2017-12-28 | 2018-05-04 | 北京国能电池科技有限公司 | The micro- mixed batteries of 48V-12V and apply its automobile |
| EP3772427A1 (en) * | 2019-08-06 | 2021-02-10 | Vitesco Technologies Germany GmbH | Electronic control unit for a vehicle with galvanically isolated supply voltages on a single printed circuit board |
| CN111483318B (en) * | 2020-03-18 | 2022-05-20 | 武汉路特斯汽车有限公司 | Vehicle power supply system management method and device and electronic equipment |
| CN113844249B (en) * | 2021-03-08 | 2022-07-15 | 比亚迪股份有限公司 | Hybrid power system, hybrid power vehicle, control method of hybrid power vehicle and vehicle control unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10313752A1 (en) * | 2003-03-27 | 2004-10-07 | Bayerische Motoren Werke Ag | Battery charging device for automobile dual-voltage onboard electrical network has DC/DC converter between voltage circuits controlled to allow successive charging of both batteries |
| CN1764036A (en) * | 2004-10-20 | 2006-04-26 | 台达电子工业股份有限公司 | Charging circuit and uninterrupted power supply system using the same |
| CN201869102U (en) * | 2010-12-06 | 2011-06-15 | 山东大学 | DC/DC changer of photovoltaic high-frequency isolating boosting soft switch |
| CN204526866U (en) * | 2015-04-20 | 2015-08-05 | 吉林大学 | A kind of automobile three voltage power system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003164151A (en) * | 2001-11-28 | 2003-06-06 | Nissin Electric Co Ltd | Dc/dc converter |
| JP6145751B2 (en) * | 2012-11-16 | 2017-06-14 | パナソニックＩｐマネジメント株式会社 | In-vehicle power supply |
-
2015
- 2015-04-20 CN CN201510187766.XA patent/CN104786863B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10313752A1 (en) * | 2003-03-27 | 2004-10-07 | Bayerische Motoren Werke Ag | Battery charging device for automobile dual-voltage onboard electrical network has DC/DC converter between voltage circuits controlled to allow successive charging of both batteries |
| CN1764036A (en) * | 2004-10-20 | 2006-04-26 | 台达电子工业股份有限公司 | Charging circuit and uninterrupted power supply system using the same |
| CN201869102U (en) * | 2010-12-06 | 2011-06-15 | 山东大学 | DC/DC changer of photovoltaic high-frequency isolating boosting soft switch |
| CN204526866U (en) * | 2015-04-20 | 2015-08-05 | 吉林大学 | A kind of automobile three voltage power system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104786863A (en) | 2015-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110040038B (en) | Energy management control method and system for hydrogen-electricity hybrid fuel cell passenger car | |
| CN104827922B (en) | Fuel cell car and its control method and control system | |
| CN104786863B (en) | A kind of automobile three voltage power system and its control method | |
| CN102088197B (en) | Method for controlling charging voltage of 12V auxiliary battery for hybrid vehicle | |
| CN101125548B (en) | Energy flow controlling method for parallel type mixed power system | |
| US10160307B2 (en) | System and method for controlling motor temperature for green car | |
| CN204526866U (en) | A kind of automobile three voltage power system | |
| CN103534135A (en) | Systems and methods for overcharge protection and charge balance in combined energy source systems | |
| CN107206903A (en) | Configured for Vehicular system and the semi-active part parallel battery of method | |
| EP2773526A2 (en) | A dual energy storage system for micro hybrid vehicles | |
| EP3232049B1 (en) | Automobile starting control system and automobile | |
| CN101624050B (en) | Hybrid-power battery SOC self-adaptive control method | |
| CN104421089A (en) | System and method for starting engine of HEV (Hybrid Electric Vehicle) | |
| CN103072492A (en) | Active control type hybrid power system for pure electric bus and control method of active control type hybrid power system | |
| Liang et al. | Energy management strategy for a parallel hybrid electric vehicle equipped with a battery/ultra-capacitor hybrid energy storage system | |
| CN207481809U (en) | Vehicle powering system and vehicle | |
| CN105473405A (en) | Drive device for a hybrid vehicle | |
| CN203713586U (en) | integrated control system for range extender of electric motor coach | |
| CN102545573B (en) | Enabling control method and output voltage control method of direct current-direct current converter (DC-DC converter) | |
| CN103909922A (en) | Vehicle control strategy of series hybrid electric vehicle | |
| US10377261B2 (en) | Method and device for charging an electric energy storage system in a vehicle | |
| CN103010204A (en) | Hybrid electric vehicle and electric quantity balancing method and device thereof | |
| CN104002657B (en) | Hybrid power vehicle | |
| CN104092365B (en) | The enable control method and output voltage control method of direct current converter | |
| CN109050518B (en) | Hybrid power system and cold start method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20180420 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |