CN105762434B - A kind of power-supply system and vehicle with self heating function - Google Patents
A kind of power-supply system and vehicle with self heating function Download PDFInfo
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- CN105762434B CN105762434B CN201610323493.1A CN201610323493A CN105762434B CN 105762434 B CN105762434 B CN 105762434B CN 201610323493 A CN201610323493 A CN 201610323493A CN 105762434 B CN105762434 B CN 105762434B
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- electrical storage
- heating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The present invention relates to a kind of power-supply systems with self heating function, and wherein alternating current self-heating circuit is by the 1st electrical storage device, the 2nd electrical storage device, power electronic switching, electric machine controller, motor form.The generator neutral point is electrically connected by the equipotentiality point between the power electronic switching and the 1st and the 2nd electrical storage device, and power electronic switching is connected between the generator neutral point and equipotentiality point.Realize efficient, the reliable and power system unit with self heating function without increasing additional power supply unit, and the power supply in the self-heating course of work all derives from power supply on vehicle system.Furthermore the invention further relates to a kind of vehicles.
Description
Technical field
The present invention relates to one kind have self-heating apparatus power-supply system, particularly it is a kind of with self-heating apparatus based on
The electrical storage device of alternating current.
Background technique
Lithium ion battery is more sensitive to low temperature, and the internal resistance of lithium ion battery sharply increases under low temperature, can discharge capacity, fill
Discharge performance is significantly limited, and leading to electric car, power performance is insufficient at low ambient temperatures, and continual mileage substantially shortens, Er Qie electricity
Pond can not almost charge to it when being lower than 0 DEG C, if charging by force, be easy to cause internal short-circuit, cause security risk.Mesh
Before have much the low temperature based on lithium ion battery use solution to the problem.
Currently, main solution is heated to battery pack.Wherein patent CN102074769A proposes to use circuit
Plate charging modes heat battery side, and patent CN103051026A proposes to pass through battery power discharge and external heating device
The mode worked at the same time heats battery pack, and patent CN201797350U proposition is added in battery case air inlet using resistance wire
Hot wind is transmitted to battery case and is internally heated by hot mode.However to there is heating power supply difficult for above scheme, heating efficiency is low,
And be easy to cause the defects of battery temperature is uneven, especially on the limited space of electric car, additional power supply unit is not
The occupied space that only will increase entire battery pack influences the layout of vehicle, and the potential safety for also adding high-voltage electric device is hidden
Suffer from.
If Japanese Patent Laid-Open Publication 2003-272712 proposition secondary cell temperature become predetermined temperature with
Under, then it is charged to the regenerative braking in the driving or traveling of generator to secondary cell by engine, secondary electricity is repeated
The charge and discharge in pond rise the temperature of secondary cell, thereby, it is possible to inhibit can input and output electric power reduction.But upper
It states in device documented by patent document 1, in order to charge to secondary cell, needs the regenerative braking or engine in traveling always
Driving to generator.In other words, it in parking, in order to rise the temperature of secondary cell, needs to drive engine.
Therefore the present invention is overcomes above-mentioned technological deficiency, propose it is a kind of efficiently, it is reliable and without increasing additional power supply unit
Power system unit with self heating function and have the vehicle of the power-supply system.On the basis of original power battery,
Without increasing the devices such as inductance or power switch tube, it is only necessary to which increasing power electronic switching can be realized under power battery low temperature environment
Self-heating, and the power supply in the self-heating course of work all derives from power supply on vehicle system.
Summary of the invention
In order to solve the above technical problems, the present invention adopts the following technical scheme:
According to the present invention, the power-supply system with self heating function includes: concatenated 1st and the 2nd electrical storage device；This
It gives and accepts between 1 and the 2nd electrical storage device and motor the power line and electric machine controller of electric power；The electric machine controller has three groups of bridges
Arm is associated with one in three windings of motor respectively, and any group of bridge arm includes upper power switch tube and lower power switch tube；From
Heating control system；The generator neutral point passes through the equipotentiality point between the power electronic switching and the 1st and the 2nd electrical storage device
It is electrically connected；Power electronic switching is connected between the generator neutral point and equipotentiality point；It is power electronic switching, described
Any one group of bridge arm of electric machine controller constitutes exchange with the associated machine winding of the bridge arm and the 1st and the 2nd electrical storage device
Electric self-heating circuit.The upper power switch tube of any one group of bridge arm and lower power switch tube work alternatively.
In addition, according to the present invention, power-supply system has: concatenated 1st and the 2nd electrical storage device；In the 1st and the 2nd electric power storage
It gives and accepts between device and motor the power line and electric machine controller of electric power；The electric machine controller have three groups of bridge arms, any group
Bridge arm includes upper power switch tube and lower power switch tube；Self-heating control system；The generator neutral point passes through the power
Equipotentiality point between electronic switch and the 1st and the 2nd electrical storage device is electrically connected.Power electronic switching is connected in the motor
Between property point and equipotentiality point；It is arranged between above-mentioned 1st electrical storage device and above-mentioned power line, in above-mentioned 1st electrical storage device
The upper power switch tube of any bridge arm of the electric machine controller of voltage conversion is carried out between above-mentioned power line；It is arranged upper
It states between the 2nd electrical storage device and above-mentioned power line, voltage conversion is carried out between above-mentioned 2nd electrical storage device and above-mentioned power line
The lower power switch tube of the above-mentioned bridge arm of the electric machine controller；The upper and lower power switch tube of the bridge arm is realized the above-mentioned 1st
And the 2nd give and accept between electrical storage device electric power.
Preferably, self-heating control system determine via above-mentioned power line between above-mentioned 1st and the 2nd electrical storage device into
The energization direction of electric power that row is given and accepted, be by the upper power switch tube of any of the above-described group of bridge arm and the control of lower power switch so that according to
It gives and accepts between above-mentioned 1st and the 2nd electrical storage device electric power according to the energization direction of the decision.
Preferably, the self-heating control system determines the 1st and the 2nd electrical storage device self-heating AC current width
Value, frequency and the start and stop of self-heating circuit.
Preferably, above-mentioned 1st and the 2nd electrical storage device is alternately connected electrically in the intermediate of above-mentioned bridge arm at least one and takes out
The inductance component of motor on head supplies electric current
Preferably, self-heating control system receives temperature, voltage and the SOC information of the 1st and the 2nd electrical storage device, realizes
Battery status synthetical collection.
Preferably, the capacity of above-mentioned 1st and the 2nd electrical storage device, single battery serial number and/or quantity phase in parallel
Together.
Preferably, the power switch tube up and down of any one group of bridge arm of electric machine controller power switch tube works alternatively, electricity
Three groups of bridge arms of machine controller work alternatively, and realize that the inductance of every group of motor is involved in work.
Preferably, self-heating control system determines above-mentioned 1st and the 2nd electrical storage device self-heating alternating current amplitude and frequency
Rate.
In addition, according to the present invention, vehicle has: above-mentioned any power-supply system.
According to the invention it is thus possible to which the 1st and the 2nd electrical storage device actively and is promptly made to heat up.And relative to not having
The power-supply system of self-heating apparatus increases only function rate self-heating switch block, has advantage at low cost, high-efficient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of involved vehicle of the invention；
Fig. 2 (a)-(c) is self-heating equivalent schematic diagram inside Vehicular dynamic battery group；
Fig. 3 (a)-(b) is self-heating charging and discharging currents schematic diagram inside Vehicular dynamic battery group；
Fig. 4 (a)-(c) is change curve of the battery pack AC impedance real part under different frequency and different temperatures；
Fig. 5 is self-heating control flow chart inside Vehicular dynamic battery group；
Fig. 6 is implementation result experimental data one of the invention；
Fig. 7 (a)-(b) is implementation result experimental data two of the invention；
Specific embodiment
Fig. 1 is the structural schematic diagram of vehicle of the present invention.Referring to Fig.1, which has: power-supply system 1,19 and drive
Power generating part.Driving force generating unit includes electric machine controller 7, motor 9, motor to the power drive mechanism between driving wheel 34
32 and drive shaft 33.
Electric machine controller 7 is connected in parallel in main positive bus-bar MPL and main negative busbar MNL.In addition, electric machine controller 7 will be from electricity
The driving power (direct current power) that source system 1,19 supplies is transformed into AC power, exports to motor 9.In addition, electric machine controller 7
The AC power that the power generation of motor 9 generates is transformed into direct current power, is exported as regenerated electric power to power-supply system 1,19.Such as Fig. 2
Shown electric machine controller 7 includes control circuit (not shown) and inverter circuit, and inverter circuit includes the bridge of the switch element of three-phase
Formula circuit controls the on-off of six switch element S1 to S6 by control circuit, the direct current that power-supply system 1,19 is supplied
Electricity is transformed to three-phase alternating current, then, drives three-phase motor 9 by inverter circuit.Electric machine controller is preferably with high-frequency PWM control
System, can also be controlled with low frequency switch.
Motor 9 receives the AC power supplied from inverter circuit, generates rotary driving force.In addition, motor 9 also receives to come from
External rotary force carries out power generation and generates AC power.For example, motor 9 is by having the three-phase for the rotor for being embedded with permanent magnet
AC rotary motor is constituted.In addition, motor 9 is connect with power drive mechanism 32, via the drive connecting with power drive mechanism 32
Moving axis 33 transmits rotary driving force to driving wheel 34.
Power-supply system 1,19 is the DC power supply that can be charged, for example, by secondary cells such as nickel-metal hydride battery, lithium ion batteries
It constitutes.In addition, power-supply system 1,19 is connect via main positive bus-bar MPL and main negative busbar MNL with electric machine controller 7.In addition, power supply
System 1,19 double layer capacitor can also be constituted again, and the specific embodiment of the invention is carried out by taking new energy vehicle power battery as an example
Illustrate, wherein the first power battery pack 1 and the series connection of the second power battery pack 19, and the first power battery pack 1 and the second power electric
The capacity of pond group 19, single battery serial number and/or quantity in parallel are identical.
Current sensor detects the current value of power-supply system 1,19 input and output, exports its inspection to self-heating control system 5
Survey result；Voltage sensor, detection power-supply system 1,19 voltage values, export its testing result to self-heating control system 5；Temperature
Sensor detects the temperature of the inside of power-supply system 1,19, exports its testing result to self-heating control system 5；In addition, power supply
System 1,19 according to the voltage value of current value, voltage sensor from current sensor and the temperature from temperature sensor,
The SOC quantity of state for calculating power-supply system 1,19, by calculated SOC quantity of state, temperature, electric current and the voltage together to self-heating
Control system 5 exports.In addition, the calculation method of quantity of state SOC, can be used various well known gimmicks；Self-heating control system 5
It can be battery management system, the frequency of alternating current self-heating loop works mode and alternating current determined according to above- mentioned information
And how amplitude, working method work and how to stop working after including whether starting, starting.
Fig. 1 shows the power-supply system with power battery, and the power battery is the first power battery pack 1 and the second power
Battery pack 19 is connected.It is every in the first power battery pack 1 and the second power battery pack 19 in equivalent circuit diagram shown here
One is respectively provided with an ideal AC impedance real part 2,17.
Self-heating control system 5 passes through signal wire 3 and signal wire 18 and the first power battery pack 1, the second power battery pack
19 connections, quantity of state, temperature, electric current and the voltage of SOC are transmitted by signal wire.Self-heating control system 5 passes through signal wire 14
It is connect with power electronic switching 15, controls power electronic switching closing or opening.Self-heating control system 5 is gone back and electric machine controller
7 communications, it is preferred that can be connect by CAN bus with electric machine controller 7.
Power supply on vehicle system with self-heating apparatus of the present invention based on alternating current, including the first power battery
Group the 1, second power battery pack 19, self-heating control system 5, electric machine controller 7, motor 9, power electronic switching 15.According to general
Logical physical knowledge, the first power battery pack 1 have the second exchange with the first AC impedance real part 2, the second power battery pack 19
Impedance real part 17, each single item in 9 three windings of motor all have inductance.
Motor 9 is connect by the first high-voltage line 8, the second high-voltage line 11, third high-voltage line 12 with electric machine controller 7, motor
Neutral point is connect by high-voltage line 10 with the equipotentiality central point of the first power battery pack 1 and the second power battery pack 19, described
Power electronic switching 15 is connected between motor 9 and the equipotentiality central point by high-voltage line 10.
Shown in 7 inverter circuit of electric machine controller such as Fig. 2 (a), the bridge arm of power switch tube therein includes three groups of bridge arms, i.e.,
First bridge arm, the second bridge arm and third bridge arm, wherein the first bridge arm includes (the upper function of also referred to as the first bridge arm of power switch tube 1
Rate switching tube) and power switch tube 4 27 (the lower power switch tube of also referred to as the first bridge arm), the second bridge arm includes power switch tube
2 29 (the upper power switch tubes of also referred to as the second bridge arm) and power switch tube 5 26 (the lower power switch tube of also referred to as the second bridge arm),
Third bridge arm includes power switch tube 3 20 (the also referred to as upper power switch tube of third bridge arm) and power switch tube 6 25 (also referred to as
The lower power switch tube of three bridge arms).Alternating current self-heating circuit passes through the control circuit in control electric machine controller 7 at work
Any one group of bridge arm in above-mentioned three groups of bridge arms is selected to connect into self-heating circuit.
Machine winding has inductive load, and inductive load can be equivalent to connecting for resistance and inductance.In this Fig. 2 (a)
In the equivalent circuit diagram shown, three terminals of motor 9 be respectively to the inductance between neutral point include inductance 1, inductance two
24 and inductance 3 23, alternating current self-heating circuit any one phase winding in optional motor 9 at work.Motor is preferentially three-phase
Alternating current generator.
Power electronic switching 15 is controlled by self-heating control system 5, and power battery needs only under the low temperature environment that stops
When self-heating just be closed, other when all disconnect.
It is opened by the first power battery pack 1, the second power battery pack 19, power electronic in alternating current self-heating circuit of the invention
Close 15, electric machine controller 7, motor 9 forms.
Alternating current self-heating circuit passes through the control circuit in electric machine controller at work and selects in above-mentioned three groups of bridge arms
Any one group, with this corresponding, corresponding with the bridge arm machine winding of alternating current self-heating loop choice；Electric machine controller
In control circuit select the first bridge arm when, first or second power battery, power electronic switching 15, the first bridge arm and inductance one
22 are combined into alternating current self-heating circuit；When control circuit in electric machine controller selects the second bridge arm, first or second power
Battery, power electronic switching 15, the second bridge arm and inductance 2 24 are combined into alternating current self-heating circuit；Control in electric machine controller
When circuit selection third bridge arm processed, first or second power battery, power electronic switching 15, third bridge arm and inductance 3 23 are combined
At alternating current self-heating circuit.
It can be seen that more specifically, alternating current self-heating circuit by the first power battery pack 1 the first AC impedance real part 2,
The second AC impedance real part 17, power electronic switching 15,7 any one groups of bridge arms of electric machine controller, electricity of two power battery packs 19
The inductance of a phase winding corresponding with the bridge arm for machine 9 is constituted.
Fig. 2 (b) shows the self-heating circuit that alternating current is combined comprising the first bridge arm and inductance 1.Power switch tube one to
Have in power switch tube six and only power switch tube 1 (the upper power switch tube of also referred to as the first bridge arm) be connected when, circuit one
Work, the first AC impedance real part 2, power switch tube 1, inductance 1 and the power electronic switching of the first power battery pack 1
15 are composed in series circuit one；Power switch tube one has into power switch tube six and only power switch tube 4 27 (also referred to as first
The lower power switch tube of bridge arm) conducting when, circuit two work, by the second AC impedance real part 17 of the second power battery pack 19,
Power switch tube 4 27, inductance 1 and power electronic switching 15 are composed in series circuit two.
The power switch tube one and four of first bridge arm works alternatively, i.e. alternately on-off, realizes the alternate communication of circuit one and two,
It gives and accepts between first and second power battery packs electric power, self-heating control system is determined by controlling the on-off of power electronic switching pipe
The energization direction for the electric power given and accepted between fixed above-mentioned first and second power battery pack.
It is so that according to the energization direction of the decision above-mentioned by above-mentioned power switch tube one and the control of power switch tube four
It gives and accepts between first and second power battery packs electric power.
The self-heating course of work is: self-heating control system 5 is according to the first power battery pack 1, the second power battery pack 19
Whether the information such as middle temperature, voltage and SOC, judgement need to carry out self-heating at this time.Example: when self-heating control system 5 detects
Battery temperature is lower than normal working temperature range, starts alternating current self-heating circuit.
When the judgement of self-heating control system 5 needs to carry out self-heating, self-heating control system 5 is excellent by bus communication
It selects CAN bus to sending instructions under electric machine controller, is closed power electronic switching 15, connect alternating current self-heating circuit.Refer to
Enable includes ac frequency and amplitude.The upper and lower bridge arm of any one group of bridge arm works alternatively in electric machine controller power switch tube,
And upper and lower bridge arm job control preferably uses high-frequency PWM control to generate sinusoidal ac by self-heating circuit, is also possible to low
Frequency switch control generates exchange triangular wave.
As shown in Fig. 2 (c), in time t1, electric machine controller 7 is issued a command under self-heating control system 5, makes function first
Rate switching tube 1 is closed, and circuit one is connected at this time, and in closing time t1, the first power battery pack 1 charges to inductance 1.
In time t2, electric machine controller 7 is issued a command under self-heating control system 5, disconnects power switch tube 1,
Power switch tube 4 27 is closed, and circuit two is connected at this time.Since inductance 1 is stored with the first power battery pack 1 within the t1 time
The electric energy of release, in time t2, inductance 1 charges to the second power battery pack 19, until the electric energy that inductance 1 stores is complete
Portion's release.
In time t3, the second power battery pack 19 charges to inductance 1.
In time t4, electric machine controller 7 is issued a command under self-heating control system 5, disconnects power switch tube 4 27,
It is closed power switch tube 1, circuit two disconnects at this time, and circuit one is connected, since inductance 1 is stored with the second power battery
The electric energy that group 19 discharges in time t3, in time t4, inductance 1 charges to the first power battery pack 1, until inductance one
The electric energy of 22 storages all discharges.
During entire self-heating, the upper and lower power switch tube of first bridge arm is worked alternatively, and is realized above-mentioned the
One and second gives and accepts between power battery pack electric power, and the first AC impedance real part 2 and the second AC impedance real part 17 generate heat
And conduct heat rapidly in internal battery pack, increase the temperature of power battery pack, to realize power battery pack in the work of alternating current
With lower generation heat, heated from power internal battery pack.
Self-heating control system 5 is according to temperature, voltage and SOC etc. in the first power battery pack 1, the second power battery pack 19
Information, determines the power frequency and amplitude in alternating current self-heating circuit, realizes that power battery is efficient, reliable self-heating.
Self-heating apparatus is a duty cycle to carry out loop cycle according to t1, t2, t3, t4.Until self-heating controls
System 5 is no longer needed according to the information such as temperature, voltage and SOC in the first power battery pack 1, the second power battery pack 19, judgement
Carry out self-heating, under send instructions make alternating current self-heating circuit disconnect, self-heating process stop.
Second bridge arm and the corresponding self-heating circuit of third bridge arm and the course of work are similar with above-mentioned first bridge arm.From adding
Thermal control system determines the energization for the electric power given and accepted between the first and second power battery packs by controlling power switch tube
Direction, by above-mentioned second or third bridge arm upper power switch tube and the control of lower power switch tube be so that according to the logical of the decision
Electric direction is given and accepted electric power between above-mentioned first and second power battery pack.
In a duty cycle, pass through operating current such as Fig. 3 of the first power battery pack 1 and the second power battery pack 19
Shown, wherein Fig. 3 (b) is the current diagram of Fig. 3 (a) in high frequency, and being greater than 1kHz is high frequency.
The heat generation rate formula of simple alternating current electro ultrafiltration is as follows:
Z in formulaReIt is mainly related with battery ambient temperature, the frequency for exchanging electro ultrafiltration for battery AC impedance value of real part, A
For the current amplitude of alternating current.Above-mentioned formula shows that heat generation rate is directly proportional to AC impedance value of real part, with AC current amplitude
It is square directly proportional, the influence of AC current amplitude variation is greater than the influence of AC impedance value of real part variation.
Fig. 4 (a) is the corresponding AC impedance real part variation characteristic of a certain environment temperature different frequency of battery pack, it is seen that exchange
Impedance real part value reduces with the increase of frequency；Fig. 4 (b) is the corresponding exchange resistance of battery pack different temperatures under a certain frequency
The variation characteristic of anti-real part, it is seen that AC impedance value of real part increases as temperature reduces.Fig. 4 (c) gives battery pack at certain
The power battery temperature characteristic of different ac frequencies, current amplitude is taken under one low temperature environment.Illustrate battery pack in low temperature item
Part can get different heating effects by change frequency, AC current amplitude.
Therefore be based on Fig. 4 (a) to Fig. 4 (c) analysis, exchange self-heating circuit preferably improves alternating current amplitude and use compared with
Low frequency quickly heats, and then realizes that power battery is rapidly heated.
Fig. 5 gives the control flow of self-heating inside the Vehicular dynamic battery group based on alternating current, and the specific method is as follows:
Self-heating control system judges whether to need to carry out to add certainly according to temperature, the end information such as voltage and SOC in Vehicular dynamic battery group
Heat, and determine the frequency and amplitude of alternating current self-heating loop works electric current；
If carrying out self-heating, self-heating control system closed power electronic switch 15 makes to exchange self-heating circuit investment work
Make, and AC current amplitude and frequency instruction, electric machine controller control mode are issued to electric machine controller 7 by CAN bus
It is preferential to select high-frequency PWM control, it can also be controlled with low frequency switch；
The frequency and amplitude of alternating current self-heating loop works electric current are to sentence with power battery pack end voltage, SOC and temperature
Disconnected foundation, when power battery pack SOC, end voltage within the allowable range, and exchange preferentially as high as possible when battery temperature is lower
Electric amplitude and the alap frequency of use quickly heat；Those skilled in the art be based on accumulator parameter, charge-discharge characteristic with
And requirement determines the limit value of alternating current amplitude and frequency.
If power battery pack SOC is within the allowable range, and voltage is held to execute beyond the first allowed band and maintain alternating current
Amplitude is constant and improves ac frequency and continues to heat, or executes and reduce alternating current amplitude simultaneously and improve frequency to continue to add
Heat.
If battery pack end voltage further exceeds the second allowed band, second allowed band includes the first permission model
It encloses perhaps battery pack SOC and beyond its allowed band or battery pack temperature reaches the desired temperature of heating, then self-heating control
System processed disconnects power electronic switching 15, stops heating.
Fig. 6 gives using working method of the invention, and Vehicular dynamic battery group is made in the alternating current of certain frequency and amplitude
Lower temperature rise variation is acted on lower self-heating, battery pack is passed through 15 minutes as seen from the figure, and temperature is increased to 0 DEG C from -40 DEG C, heating effect
Fruit is good.
Fig. 7 (a) gives battery pack 1C flash-over characteristic under -20 DEG C of environment temperatures, relative to not after AC electric-heating 15min
When heating, battery power discharge power ascension 20%, discharge capacity improve 45%；Fig. 7 (b) gives under -40 DEG C of environment temperatures
Battery pack 1C flash-over characteristic, battery cannot discharge when not heating, and 75% capacity can be released after AC electric-heating 20min, is filled
It defends oneself the bright low temperature discharge ability that battery can be effectively promoted using above-mentioned alternating current self-heating method.
It supplements again, 7 power switch tube of electric machine controller is not limited to IGBT or physics independently of motor in the present invention
Other power electronic devices of controller 7, power electronic switching 15 does not limit to and high voltage connector, and motor 9 is any one in circuit
Phase winding can be the inductance outside independently of motor, and ac power waveform is preferentially sine wave, can be triangular wave.
Claims (10)
1. a kind of power-supply system with self heating function, comprising:
Concatenated 1st and the 2nd electrical storage device；
It gives and accepts between the 1st and the 2nd electrical storage device and motor the power line and electric machine controller of electric power；The electric machine controller
It is associated with one in motor three-phase windings respectively with three groups of bridge arms, and any group of bridge arm include upper power switch tube and
Lower power switch tube；
Self-heating control system；
It is characterized by:
The neutral point of the motor is electrically connected by the equipotentiality point between power electronic switching and the 1st and the 2nd electrical storage device；
Power electronic switching is connected between the neutral point of the motor and equipotentiality point；
The power electronic switching, any one group of bridge arm of the electric machine controller, with a phase of the associated motor of the bridge arm around
Group and the 1st and the 2nd electrical storage device constitute alternating current self-heating circuit；
The upper power switch tube of any one group of bridge arm and lower power switch tube work alternatively, and realize power-supply system self-heating.
2. one kind has self-heating apparatus power-supply system, have:
Concatenated 1st and the 2nd electrical storage device；
It gives and accepts between the 1st and the 2nd electrical storage device and motor the power line and electric machine controller of electric power；The electric machine controller
Associated with one in motor three-phase windings respectively with three groups of bridge arms, any group of bridge arm includes upper power switch tube under
Power switch tube；
Self-heating control system；
It is characterized by:
The neutral point of the motor is connected by the equipotentiality point electric power between the power electronic switching and the 1st and the 2nd electrical storage device
It connects；
Power electronic switching is connected between the neutral point of the motor and equipotentiality point；
Be arranged between above-mentioned 1st electrical storage device and above-mentioned power line, between above-mentioned 1st electrical storage device and above-mentioned power line into
The upper power switch tube of any bridge arm of the electric machine controller of row voltage conversion；
Be arranged between above-mentioned 2nd electrical storage device and above-mentioned power line, between above-mentioned 2nd electrical storage device and above-mentioned power line into
The lower power switch tube of the above-mentioned bridge arm of the electric machine controller of row voltage conversion；
The upper and lower power switch tube of the bridge arm works alternatively, and realizes electric power of giving and accepting between above-mentioned 1st and the 2nd electrical storage device,
Realize power-supply system self-heating.
3. power-supply system as claimed in claim 1 or 2, it is characterised in that: the self-heating control system is determined via above-mentioned
The energization direction for the electric power that power line is given and accepted between above-mentioned 1st and the 2nd electrical storage device, by the upper of any of the above-described group of bridge arm
Power switch tube and the control of lower power switch tube are so that according to the energization direction of the decision in above-mentioned 1st and the 2nd electrical storage device
Between give and accept electric power.
4. power-supply system as claimed in claim 3, it is characterised in that: the self-heating control system controls the self-heating mistake
AC current amplitude, frequency and self-heating start and stop in journey.
5. power-supply system as claimed in claim 3, it is characterised in that: above-mentioned 1st and the 2nd electrical storage device is alternately at least one
The inductance component of motor on a centre tap for being connected electrically in above-mentioned bridge arm supplies electric current.
6. power-supply system as claimed in claim 3, it is characterised in that: self-heating control system receives the 1st and the 2nd electrical storage device
Capacity, temperature, voltage and SOC information.
7. power-supply system as claimed in claim 3, it is characterised in that: the above-mentioned 1st is identical with the capacity of the 2nd electrical storage device, single
The series connection of body battery and/or quantity in parallel are identical.
8. such as the described in any item power-supply systems of claim 1-2,4-7, it is characterised in that: any one group of bridge arm of electric machine controller
Power switch tube up and down work alternatively, three groups of bridge arms of electric machine controller work alternatively.
9. such as the described in any item power-supply systems of claim 1-2,4-7, it is characterised in that: self-heating control system determines above-mentioned
Self-heating alternating current amplitude and frequency.
10. a kind of vehicle, it is characterised in that: have according to claim 1~any one of 9 described in power-supply system.
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| CN201610323493.1A CN105762434B (en) | 2016-05-16 | 2016-05-16 | A kind of power-supply system and vehicle with self heating function |
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| CN201610323493.1A CN105762434B (en) | 2016-05-16 | 2016-05-16 | A kind of power-supply system and vehicle with self heating function |
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| CN105762434A CN105762434A (en) | 2016-07-13 |
| CN105762434B true CN105762434B (en) | 2018-12-07 |
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