CN106229583B - A kind of electrical storage device heating means heated based on LC resonance - Google Patents
A kind of electrical storage device heating means heated based on LC resonance Download PDFInfo
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- CN106229583B CN106229583B CN201610592212.2A CN201610592212A CN106229583B CN 106229583 B CN106229583 B CN 106229583B CN 201610592212 A CN201610592212 A CN 201610592212A CN 106229583 B CN106229583 B CN 106229583B
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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
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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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
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The present invention proposes that a kind of electrical storage device heating means heated based on LC resonance, this method are back and forth flowed using energy between the DC power supply, the LC resonance unit and shown electrical storage device, generates simple sinusoidal alternating current；The AC impedance real part that the sinusoidal ac flows through the electrical storage device generates the heat realization heating.By judging the range of electrical storage device SOC, terminal voltage and temperature to determine whether being heated.Quick, high-efficiency heating is realized from inside battery, has ensured performance under battery low temperature environment, and with power-supply system object in heating process, the electric current of application is the sinusoidal alternating current of standard, is conducive to improve battery consistency and service life.
Description
Technical field
The present invention relates to a kind of power supply heating means, and in particular, to a kind of electric power storage dress heated based on LC resonance
Set heating means.
Background technology
With the gradually popularization of electric vehicle, the cryogenic property of Vehicular dynamic battery is more and more concerned by people.
Under the relatively low environment of winter temperature, the internal resistance of lithium ion battery drastically increases, and discharge capacity obviously decays, and large current charge and puts
Electric energy power reduces, and leading to problems such as electric vehicle generate, continual mileage shortens, dynamic property is deteriorated and charging is difficult, and most of electricity
Pond can not charge to it when less than 0 DEG C, if charging by force, is easy to cause internal short-circuit, causes security risk.In order to solve this
One problem, more effective method are heated to power battery, there is the much low temperature based on lithium ion battery at present
Use solution to the problem.
Currently, main solution is heated to battery pack.Its 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 propositions are 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 said program, the efficiency of heating surface is low,
And be easy to cause the defects of battery temperature is uneven, it is especially limited spatially in electric vehicle, it is additional for electric installation not
The occupied space that entire battery pack can only be increased, influences the layout of vehicle, and the potential safety for also adding high-voltage electric device is hidden
Suffer from.
The above-mentioned prior art generates heat to add to battery using outside heating method, i.e., by external heat-generating device
Heat, this method is simple and practicable, but since heat needs slowly to pass to inside battery from outside, time-consuming, and
It is likely to only heated the surface layer of battery in a short time, the inside of battery can not then be determined whether really in the short time
Inside realize heating.
It is heated in the prior art in internal battery pack, if No. 2003-272712 proposition of Japanese Laid-Open Patent Publication
The temperature of secondary cell becomes set point of temperature hereinafter, then by engine to the regenerative braking pair in the driving of generator or traveling
Secondary cell charges, and the charge and discharge of secondary cell are repeated, make the temperature rise of secondary cell, and thereby, it is possible to inhibit can be defeated
Enter the reduction of the electric power of output.But in the device recorded in above patent document 1, in order to charge to secondary cell, always
Need driving of the regenerative braking or engine in traveling to generator.In other words, in parking, in order to make secondary cell
Temperature rise needs to drive engine.
In addition CN102074756A discloses a kind of inside battery heater circuit, and accumulator and battery series connection, energy exist
Back and forth battery heating is realized in flowing between battery and accumulator.But in above-mentioned heating process, when electric current is from accumulator
When flowing back to battery E, the energy in charge storage cell C1 will not flow back to battery E completely, but have some energy and remain in electricity
In charge storing element C1, finally so that charge storage cell C1 voltages be close or equal to cell voltage so that from battery E to
The energy flow of charge storage cell C1 cannot carry out, and be unfavorable for the cycle operation of heater circuit.It is set based on this circuit needs
It sets energy supposition unit and realizes that charge storage cell is overlapped with the energy in battery.The circuit structure is complicated, current waveform
Nonstandard quasi-sine-wave, has an impact battery life.
Therefore the present invention proposes one kind under the low temperature environment that stops, efficient, sinusoidal ac to overcome above-mentioned technological deficiency
Heating means generate standard, simple sinusoidal alternating current that low-and high-frequency all meets by LC resonance circuit, act on entire power supply system
System；Using impedance operator of the power-supply system under simple alternating current electric excitation, realizes quick, high-efficiency heating from inside battery, ensure
Performance under battery low temperature environment, and with power-supply system object in heating process, the electric current of application is the sinusoidal of standard
Alternating current is conducive to improve battery consistency and service life.
Invention content
A kind of electrical storage device heating means heated based on LC resonance of the present invention, including DC power supply, LC resonance
Unit, switching device and electrical storage device, the electrical storage device have AC impedance real part；The LC resonance unit include capacitance and
Inductance；
The switching device realizes that energy back and forth flows between the DC power system and the LC resonance unit, produces
Raw simple sinusoidal alternating current；The AC impedance real part that the sinusoidal ac flows through the electrical storage device generates heat realization institute
State self-heating.
Described method includes following steps：
A) temperature, terminal voltage and SOC information in electrical storage device are acquired, judges whether to be heated；
If b) judging result is to be heated, make LC resonance cell operation；
If c) SOC of electrical storage device and terminal voltage are within the allowable range, the switch frequency of the switching device is controlled as far as possible
Close to the resonant frequency of LC resonance unit, quickly heating is realized with the operating current of maximum alternating current amplitude；
If d) electrical storage device SOC is within the allowable range, and electrical storage device terminal voltage exceeds the first permissible value, described in execution
Switching frequency deviates the resonant frequency of the resonant element, continues to heat to reduce alternating current amplitude；
If e) battery pack terminal voltage is further below the second permissible value, second permissible value is less than the first permissible value, or
Person's electrical storage device SOC reaches the desired temperature of heating beyond allowable range or electrical storage device temperature, then heating control system
Closed power electronic switch 5 stops heating.
Further, it is the half-bridge for having upper and lower bridge arm that the method, which further includes the switching device, the bridge up and down
Arm timesharing break-make, by controlling the switching frequency of the switching device, when reciprocal flowing for controlling energy, flows to electric power storage dress
Set the size of current of battery；
Further, the described of the energy back and forth flows through two performance loop time-sharing works, is filled by switching
Upper and lower bridge arm in setting controls described two performance loop alternate conductions and shutdown, and the performance loop one is by DC power supply system
System, the upper bridge arm 301 of switching device, LC resonance unit and electrical storage device are composed in series；The performance loop two by electrical storage device,
LC resonance unit, switching device lower bridge arm 302 be composed in series.
Further, further include power electronic switching, the power electronic switching is connected in parallel on LC resonance unit both ends, if
Power electronic switching turns off, and LC resonance unit can not work, if power electronic switching turns off, LC resonance unit participates in work.
Further, further include heating control system, the heating control system collect electrical storage device electric current, voltage and
SOC information judges whether to be heated, and controls half-bridge and power electronic switching state.
Further, apolegamy L and C parameter values keep the frequency of oscillation of LC resonance unit low as far as possible, to improve heating
Effect.
Further, alternating current amplitude described in the step d) is to judge with electrical storage device terminal voltage, SOC and temperature
Foundation.
Further, the electrical storage device is Vehicular dynamic battery group.
Preferably, it is using the power-supply system of the method for the present invention：Including DC power supply, switching device, LC resonance unit and
Electrical storage device；
The switching device includes upper bridge arm and lower bridge arm；The upper bridge arm and lower bridge arm connect with DC power supply both ends respectively
It connects；
The electrical storage device has AC impedance real part；
The LC resonance unit includes capacitance and inductance, and LC resonance unit one end is connected to the upper bridge arm and lower bridge
Between arm, the other end connects electrical storage device anode, and electrical storage device cathode is connect with DC power cathode；
By DC power supply and LC resonance unit, energy conversion is completed, generates simple sinusoidal alternating current, the sinusoidal ac electricity
The AC impedance real part for flowing through electrical storage device generates the heat realization internal heating.
Preferably, it is expressed as using the power-supply system another kind of the method for the present invention：It is opened including DC power supply, power electronic
Pass, half-bridge, LC resonance unit and electrical storage device；
The half-bridge includes upper bridge arm and lower bridge arm；
The electrical storage device has AC impedance real part；
The LC resonance unit includes capacitance and inductance,
There are two performance loop time-sharing works for the power-supply system tool, are controlled by the upper and lower bridge arm in half-bridge described two
Performance loop alternate conduction and shutdown,
The performance loop one is composed in series by DC power supply, the upper bridge arm of half-bridge, LC resonance unit and electrical storage device；
The performance loop two is composed in series by the lower bridge arm of electrical storage device, LC resonance unit, half-bridge.
Energy conversion is completed by DC power supply and LC resonance unit, electrical storage device, generates simple sinusoidal alternating current, the sine
AC impedance real part of the alternating current through electrical storage device generates heat and realizes the internal heating.
Further, power-supply system further includes power electronic switching, and the power electronic switching is connected in parallel on LC resonance list
Whether first both ends, control LC resonance unit work.
Further, power-supply system further includes heating control system, and the heating control system collects electrical storage device electricity
Stream, voltage and SOC information, judge whether to be heated, and control half-bridge and power electronic switching state is heated.
Further, power-supply system apolegamy L and C parameter values keep the frequency of oscillation of LC resonance unit low as far as possible, with
Improve heating effect.
Further, power-supply system when electrical storage device SOC and terminal voltage within the allowable range, preferably control half-bridge open
It closes frequency and is equal to LC resonance frequency.
Description of the drawings
Fig. 1, heating power supply overall system architecture figure.
Fig. 2 (a), heating power supply circuit system schematic diagram.
Fig. 2 (b), heating power supply system performance loop one and performance loop two.
Fig. 2 (c), the circuit diagram of another embodiment of heating power supply system.
Fig. 3 (a), heating power supply system resonance flow through electrical storage device curent change schematic diagram when working.
Fig. 3 (b), electrical storage device electric current and voltage change schematic diagram in half-bridge circuit a cycle.
Fig. 4 (a), the corresponding AC impedance real part variation of sinusoidal ac of a certain environment temperature different frequency of certain lithium battery
Characteristic.
Fig. 4 (b), the variation characteristic of the corresponding AC impedance real part of certain lithium battery different temperatures under a certain frequency.
Fig. 4 (c), the simple alternating current electrical heating of certain lithium battery identical frequency, different current amplitudes under a certain low temperature environment
Temperature characteristic.
Fig. 5 is shown as the current amplitude variation characteristic of the simple alternating current electro ultrafiltration lithium battery under different frequency.
Fig. 6 is the control flow of heating power supply system.
Specific implementation mode
As shown in Figure 1, a kind of power-supply system heated based on LC resonance, including DC power supply 4, half-bridge circuit 3,
LC resonance unit 2 and electrical storage device 1, and power electronic switching 5 is connected in parallel on 2 both sides of LC resonance unit；As shown in Fig. 2 (a),
Half-bridge circuit 3 includes upper bridge arm 301 and lower bridge arm 302, and the half-bridge circuit 2 can be IGBT or Mosfit, upper bridge arm 301
One end is connect with the anode of DC power supply 4, and 302 one end of lower bridge arm is connect with the cathode of DC power supply 4, and power-supply system further includes electricity
Drive system 7 and driving wheel 8.
When power-supply system heating work, power electronic switching 5 disconnects.
LC resonance unit 2 includes capacitance 201 and inductance 202, and the capacitance 201 and inductance 202 use cascade, such as scheme
Shown in 2 (a), 202 one end of inductance is connected between bridge arm 301 and lower bridge arm 302, and 201 one end of capacitance is connecting electrical storage device just
Pole, 1 cathode of electrical storage device are connect with 4 cathode of DC power supply, and electrical storage device 1 includes electromotive force 101 and AC impedance real part 102；
Energy back and forth flows between DC power supply 4, LC resonance unit 2 and electrical storage device 1, generates simple sinusoidal alternating current, simple alternating current
AC impedance real part 102 of the electric current through electrical storage device 1 generates heat and realizes heating.
There are two performance loop, circuit one and circuits two for the power-supply system tool of heating, as shown in Fig. 2 (b), bridge arm in control
With lower bridge arm alternate conduction and shutdown, circuit one and circuit two work alternatively.One circuit of circuit is by DC power supply, upper bridge arm, electricity
Sense L, capacitance C, the electromotive force E of electrical storage device and AC impedance real part R are composed in series；Two circuit of circuit by lower bridge arm, inductance L,
Capacitance C, the electromotive force E of electrical storage device and AC impedance real part R are composed in series.
DC power supply 4 is chosen as super capacitor or on-board engine-generating set or external charging interface imports
Direct current.
When DC power supply be super capacitor when, closed power electronic switch, at this time Fig. 2 (a) constitute composite power source (accumulator
And super capacitor) system, half-bridge circuit composition DC-DC devices.Controlling bridge arm on half-bridge circuit realizes electrical storage device to super electricity
Hold low current charge, meets the energy needed for DC power supply when super capacitor heats under low temperature environment.
Electrical storage device 1 is the DC power supply that can carry out charge and discharge, for example, by the secondary electricity such as Ni-MH battery, lithium ion battery
Pond is constituted, and the specific embodiment of the invention is illustrated by taking new energy vehicle power battery as an example.
Electrical storage device 1 is made of certain amount single battery series and parallel, in equivalent circuit diagram shown here, tool
There are the electromotive force and internal communication impedance real part of reaction cell energy state.
Independent half-bridge either one group of bridge arm of shared electric machine controller or shared vehicle-mounted DC- can be used in the half-bridge circuit
DC bridge arms, Fig. 2 (a) are to share vehicle-mounted hybrid power system DC-DC bridge arms；
Such as Fig. 1, heating control system 6 acquires current value, voltage and the temperature of electrical storage device 1, calculates the lotus of electrical storage device
Electricity condition (SOC), wherein various well known computational methods can be used by calculating SOC, heating control system is preferably battery management
System determines that resonance heating circuit working method, alternating current amplitude, half-bridge circuit upper and lower bridge arm are opened according to above- mentioned information
Frequency is closed, working method includes whether to start, how to work and how to be stopped after startup.
Power electronic switching 5 is controlled by heating control system, and power battery needs to add certainly only under the low temperature environment that stops
When hot just disconnect, other when be all closed.
When half-bridge circuit shares one group of bridge arm of electric machine controller, realize shown in circuit diagram such as Fig. 2 (c), LC resonance
Unit is connect by the upper bridge arm 301 of control one group of bridge arm of power electronic switching 502 and electric machine controller, 302 centre of lower bridge arm,
And another power electronic switching 501 connection electrical storage device anode controls 301 phase of upper bridge arm of one group of bridge arm of control with motor
Even；When heating power supply system of stopping works, power electronic switching 502 is closed, and power circuit switch 501 disconnects；When heating electricity
When source system does not work, power electronic switching 502 disconnects, and power circuit switch K1 is closed；
The resonance heating circuit course of work：Heating control system according to the information such as temperature, voltage and SOC in electrical storage device,
Whether judgement is heated at this time, and when reaching heating condition, heating control system control resonance heating circuit starts work
Make, electrical storage device is heated, when reaching stopping heating condition, control resonance heating circuit is stopped.Example：Work as heating
Control system detects that battery temperature is less than normal working temperature range, starts resonance heating circuit.
When judging to be heated, for Fig. 2 (a) embodiments, heating control system keeps power electronic switching 5 disconnected
It opens；To Fig. 2 (c) embodiments, heating control system makes power electronic switching 502 be closed, and power circuit switch 501 disconnects.Pass through
Aforesaid way makes resonance heating circuit connect, by other electronic control units, preferably electric machine controller or composite power source DC-
DC, control half-bridge circuit upper and lower bridge arm works alternatively, and upper and lower bridge arm switching frequency is preferably LC resonance unit resonance frequency.
It connects in R, L, C resonance circuit, the power of inductance and capacitive absorption is respectively：
PL(t)=- QUIsin (2 ω0t)；
PC(t)=- PL(t)=QUIsin (2 ω0t).
Due to u (t)=uL(t)+uC(t)=0 (it is equivalent to imaginary short), any moment enters the total instantaneous of inductance and capacitance
Power is zero, i.e. PL(t)+PC(t)=0.There is no energy exchange between inductance and capacitance and DC power supply, resistance.But inductance
Energy is exchanged with each other between capacitance, when the current decreases, the magnetic field energy W discharged in inductanceL=0.5Li2Reduce, and all
By capacitive absorption, and be converted to electric field energy.When a current increases, capacitance voltage reduces, the electric field energy W of capacitance releaseC=
0.5Cu2Reduce, and all absorbed by inductance, and is converted to magnetic field energy.Reciprocal exchange of the energy between inductance and capacitance,
Current sinusoidal oscillation is formed, as shown in Fig. 3 (a), frequency of oscillation is determined by L and C, i.e.,
As shown in Fig. 2 (b), within the t1 times, bridge arm 301 is connected on half-bridge circuit, and lower bridge arm 302 turns off, one work of circuit
Make, DC power supply charges to electrical storage device, and the AC impedance real part that circuit flows through electrical storage device generates heat from inside heating, together
When inductance L and capacitance C between carry out foregoing energy exchange, and due to resonance effect energy and remain unchanged；In t2
In, bridge arm 301 turns off on half-bridge circuit, and lower bridge arm 302 is connected, and electrical storage device electric discharge, electric current flows through the AC impedance of itself
Real part generates heat and is heated from inside, while energy exchange is carried out between inductance L and capacitance C, and due to resonance effect energy and
It remains unchanged.
Fig. 3 (a) shows curent change characteristic of the electrical storage device with upper bridge arm and lower bridge arm break-make, when LC resonance circuit work
When making, obtaining energy gradually from DC power supply by very short time makes L, C progressively reach energy storage balance, in LC after balance
Resonance is generated in circuit, the sine wave of standard is presented in current waveform.
After Fig. 3 (b) shows LC resonance unit energy storage balance, electrical storage device terminal voltage and curent change are special in a cycle
Property, wherein electric current is in standard sine wave, and terminal voltage is voltage of the superposition one in sinusoidal waveform on the basis of electrical storage device electromotive force,
The voltage of the sinusoidal waveform is that electrical storage device AC impedance real part is acted on the sinusoidal current flowed through as a result, terminal voltage changes model
Electrical storage device voltage allowable range should be met by enclosing.
When sinusoidal ac flows through electrical storage device, the heat generation rate formula of electrical storage device AC impedance real part is as follows：
Z in formulaReFor electrical storage device AC impedance value of real part, have with electrical storage device environment temperature, the frequency for exchanging electro ultrafiltration
It closes, A is the current amplitude of alternating current, and above-mentioned formula shows that heat generation rate is directly proportional to AC impedance value of real part, with AC current
Square directly proportional, the influence for influencing to be more than the variation of AC impedance value of real part of AC current amplitude variation of amplitude.
By taking electrical storage device is lithium battery as an example, Fig. 4 (a) shows the sinusoidal ac action battery of certain low temperature environment different frequency
When, inside battery AC impedance real part variation characteristic, it is seen that AC impedance value of real part reduces with the increase of ac frequency,
General lower frequency (10Hz or less) has larger AC impedance real part.And the frequency of oscillation of LC resonance heating circuit is completely by L
It determining with C, after L and C parameters are selected, the frequency of alternating current is determined, i.e. AC impedance value of real part is determined, so in order to
Reach better heating effect at low temperature, preferentially from low frequency Angle Fitting L and C parameter value, i.e., under enabled condition, as far as possible
Match to lower frequency L and C parameter values；Fig. 4 (b) is the corresponding AC impedance real part of battery pack different temperatures under a certain frequency
Variation characteristic, it is seen that AC impedance value of real part with temperature reduce and increase.Fig. 4 (c) shows that battery pack exists by experiment
The power battery temperature characteristic of identical frequency under a certain low temperature environment, different current amplitudes, shows that battery passes through in cryogenic conditions
Change AC current amplitude and can get different heating effects, AC current amplitude is bigger, and heating effect is better.
Therefore, it is based on the analysis of Fig. 4 (a) to Fig. 4 (c), half-bridge circuit switching frequency fs preferably uses LC in heating circuit
Resonant frequency f0, realize quickly heating to reach larger sinusoidal ac amplitude, and then realize that electrical storage device and battery quickly rise
Temperature, but on condition that the voltage change range of electrical storage device should be within the allowable range.
Fig. 5 shows the relationship for the current amplitude that half-bridge circuit switching frequency fs is generated with resonance heating circuit, wherein f0For
LC resonance frequency, it is seen that when half-bridge circuit switching frequency fs is equal to LC resonance frequency f0When, resonance heating circuit current amplitude is most
Greatly.
Fig. 6 gives the power-supply system control flow heated based on LC resonance, and the specific method is as follows：Computer heating control system
System judges whether to be heated according to temperature, terminal voltage and SOC information in Vehicular battery, if being heated, computer heating control
System controls power electronic switching, and resonance heating circuit is made to devote oneself to work；Then heating control system determines resonance heating circuit
Half-bridge switch frequency, controls the upper and lower bridge arm of half-bridge circuit according to determining heating circuit switching frequency alternate conduction and shutdown,
Preferred half-bridge circuit switching frequency fs is equal to LC resonance frequency f at this time0, quickly heating is realized with the operating current of higher magnitude,
By completing energy conversion between DC power supply, LC resonance unit and electrical storage device, simple sinusoidal alternating current is generated, electric power storage dress is flowed through
It sets internal communication impedance real part and generates heat realization cryogenic inner heating.
If power battery pack SOC is within the allowable range, and terminal voltage exceeds the first allowable range, executes and deviates oscillation frequency
Rate f0Continue to heat to reduce alternating current amplitude, the amplitude of resonance heating circuit operating current is with power battery pack end electricity at this time
Pressure, SOC and temperature are basis for estimation；It is true that those skilled in the art are based on accumulator parameter, charge-discharge characteristic and requirement
Determine alternating current amplitude.
If battery pack terminal voltage further exceed the second allowable range, first allowable range the second allowable range it
It is interior, i.e., described second range include the first range either battery pack SOC reach beyond allowable range or battery pack temperature plus
The desired temperature of heat, then heating control system control power electronic switching, stops heating；Those skilled in the art are based on electric power storage
Pond parameter, charge-discharge characteristic and requirement determine alternating current amplitude.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.
Claims (8)
1. a kind of electrical storage device heating means heated based on LC resonance, including DC power supply, LC resonance unit, switch dress
It sets and electrical storage device, the electrical storage device has AC impedance real part；The LC resonance unit includes capacitance and inductance；
The switching device realizes that energy back and forth flows between the DC power supply and the LC resonance unit, electrical storage device,
Generate simple sinusoidal alternating current；The AC impedance real part that the sinusoidal ac flows through the electrical storage device generates heat realization
The heating；
Described method includes following steps：
A) temperature, terminal voltage and SOC information in electrical storage device are acquired, judges whether to be heated；
If b) above-mentioned judgement is heated, make LC resonance cell operation；
If c) SOC of electrical storage device and terminal voltage are within the allowable range, the switch frequency for controlling the switching device is equal to LC resonance
The resonant frequency of unit realizes quickly heating with the operating current of maximum alternating current amplitude；
If d) electrical storage device SOC is within the allowable range, and electrical storage device terminal voltage exceeds the first allowable range, is opened described in execution
The resonant frequency for closing LC resonance unit described in frequency departure, continues to heat to reduce alternating current amplitude；
If e) battery pack terminal voltage further exceeds the second allowable range, the second permissible value range includes the first permission model
It encloses either electrical storage device SOC and reaches the desired temperature of heating beyond allowable range or electrical storage device temperature, be then closed work(
Rate electronic switch stops heating.
2. the method as described in claim 1, it is characterised in that：The switching device is the half-bridge for having upper and lower bridge arm, described
Upper and lower bridge arm timesharing break-make controls the simple sinusoidal alternating current size by controlling the switching frequency of the switching device.
3. method as claimed in claim 2, it is characterised in that：The described of the energy back and forth flows through two performance loops
Time-sharing work controls described two performance loop alternate conductions and shutdown, the work by the upper and lower bridge arm in switching device
Circuit one is composed in series by DC power supply, upper bridge arm, LC resonance unit and electrical storage device；The performance loop two is filled by electric power storage
It sets, LC resonance unit, lower bridge arm are composed in series.
4. the method as described in claim 1, it is characterised in that：Further include power electronic switching, the power electronic switching is simultaneously
LC resonance unit both ends are associated in, if power electronic switching is closed, LC resonance unit can not work, if power electronic switching disconnects,
LC resonance unit participates in work.
5. the method as described in claim 1, it is characterised in that：Further include heating control system, the heating control system is received
Collect electrical storage device electric current, voltage and SOC information, judge whether to be heated, and controls switching device and power electronic is opened
Off status.
6. method as claimed in claim 5, it is characterised in that：Apolegamy L and C parameter values make the frequency of oscillation of LC resonance unit connect
Corresponding frequency when larger of electrical storage device AC impedance real part described in nearly low temperature environment.
7. method as claimed in any one of claims 1 to 6, it is characterised in that：Alternating current amplitude is to store described in the step d)
Electric installation terminal voltage, SOC and temperature are basis for estimation.
8. the method for claim 7, it is characterised in that：The electrical storage device is Vehicular dynamic battery group.
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| CN107845840A (en) * | 2017-12-07 | 2018-03-27 | 上汽大众汽车有限公司 | Battery heater circuit |
| CN110148985A (en) * | 2019-05-29 | 2019-08-20 | 石家庄纽伦制动技术有限公司 | Battery group low temperature vibrates charging control circuit and control method |
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