CN107039708A - A kind of Li-ion batteries piles low temperature self-heating method - Google Patents
A kind of Li-ion batteries piles low temperature self-heating method Download PDFInfo
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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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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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- 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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4815—Resonant converters
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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
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Abstract
The invention discloses a kind of Li-ion batteries piles low temperature self-heating method, battery aging status and SOC optimal heating frequency scope are taken into account based on minimum principle determination is influenceed on battery life；Serial-resonant inverter circuit is designed, the simple sinusoidal alternating current that optimal control strategy makes inverter circuit export target frequency and target amplitude in battery side is explored；The simple sinusoidal alternating current exported using resonant mode inverter circuit carries out low temperature self-heating to battery pack, as battery temperature is raised, the internal resistance of cell is gradually reduced, and resonant mode inverter circuit adaptively increases output current amplitude, increase the battery pack rate of heat addition, battery pack is quickly increased to target temperature.The present invention have, cryogenic property fast on Li-ion batteries piles self-heating speed under low temperature improve substantially, it is self-heating efficiency high, good and other effects without influence and heating-up temperature uniformity on lithium ion battery service life, will promotion electric automobile cold district popularization and application.
Description
Technical field
The present invention relates to battery pack technical field of heating, specifically a kind of Li-ion batteries piles low temperature self-heating method,
Espespecially on efficient, the reliable low temperature self-heating method of Li-ion batteries piles of the lithium ion battery life-span without influence.
Background technology
The fast development of electric automobile of energy scarcity and the dual-pressure boosting of environmental pollution, lithium ion battery is with monomer
Voltage height, energy density height, long lifespan, memory-less effect, it is pollution-free the advantages of, as electric powered motor drive first choice electricity
Pond.
However, lithium ion battery delays because inside battery Chemical Kinetics, kinetics of diffusion are substantially sluggish under low temperature
Slowly, increase internal resistance tenfold, cause lithium ion battery energy conversion efficiency degradation in cold environment, electric automobile
Continual mileage and pulse output power decline to a great extent.In addition, lithium ion battery charging is extremely difficult under low temperature, more seriously,
Because side reaction causes negative pole formation lithium metal deposition (analysis lithium) rather than Lithium-ion embeding negative pole.Analysis lithium can accelerate battery to decline
Move back, lithium metal causes inside lithium ion cell short circuit to cause safety hazard, such as thermal runaway it is also possible to puncturing barrier film.Lithium under low temperature
Ion battery performance degradation, have impact on user using convenience, economy and security during electric automobile, greatly limits
Electric automobile promoting the use of in cold environment is made.
Therefore, batteries of electric automobile group is carried out being heated as highly important problem, external heat is easily in lithium-ion electric
Thermograde is formed in the bag of pond, causes Temperature Distribution in battery pack inconsistent, certain heat spot accelerated ageing can be made, and it is most of
Energy is dissipated, and energy utilization efficiency is extremely low.
Heat inside DC current, due to the limitation of the time span and amplitude of the DC current of application, in DC current
Portion's heating can limit rate of heat production and the efficiency of heating surface, cause that the rate of heat addition is slow, efficiency is low.
Existing alternating current inside heating method, is only to be directed to monomer lithium ion battery, rarely has for battery pack, because
The low temperature self-heating method of this exploitation Li-ion batteries piles is significant to promoting the use of for electric automobile under cold environment.
The content of the invention
For defect present in prior art, add certainly it is an object of the invention to provide a kind of Li-ion batteries piles low temperature
Hot method, can improve and be difficult to the problems such as battery pack heating or the battery pack efficiency of heating surface are low, cost is high in the prior art.
To achieve the above objectives, the present invention is adopted the technical scheme that：
A kind of Li-ion batteries piles low temperature self-heating method, comprises the following steps：
The EIS of different ageing state batteries, determines the optimal heating frequency of different ageing state batteries under S1, test low temperature
Scope；
The EIS of different state-of-charge (SOC) batteries, determines the optimal heating frequency of different SOC batteries under S2, test low temperature
Scope；
S3, determination take into account the scope of the optimal heating frequency of battery aging status and battery SOC；
S4, consideration circuit efficiency, control complexity and reliability factor, occur circuit to simple sinusoidal alternating current and select
Type, is defined as serial-resonant inverter circuit；
S5, according to optimal heating frequency scope and the requirement of self-heating time, select the frequency and width of simple sinusoidal alternating current
Value, designs the main circuit of serial-resonant inverter circuit, determines each device parameters and switching tube model accordingly；
S6, the control circuit for designing serial-resonant inverter circuit, are controlled to serial-resonant inverter circuit, it is ensured that
Battery side exports the simple sinusoidal alternating current of target frequency and target amplitude；
S7, the simple sinusoidal alternating current exported using serial-resonant inverter circuit carry out low temperature self-heating to battery pack；
S8, when battery pack temperature reaches target temperature, lockout switch pipe pulse forbids simple sinusoidal alternating current to export.
On the basis of above-mentioned technical proposal, in step S5, the switching tube of the serial-resonant inverter circuit is in zero electricity
During stream shut-off with it is open-minded, switching loss is close to 0.
On the basis of above-mentioned technical proposal, the switching tube includes IGBT1, IGBT2, IGBT3 and IGBT4.
On the basis of above-mentioned technical proposal, main circuit includes described in step S5：IGBT1、IGBT2、IGBT3、
IGBT4, electric capacitor, inductance, equivalent resistance and contactor；The positive pole of the Li-ion batteries piles is connected with contactor, contact
Device is connected with IGBT1 colelctor electrode and IGBT 2 colelctor electrode respectively, and one end of the inductance connects IGBT2 emitter stage respectively
With IGBT4 colelctor electrode, one end connection of the other end and electric capacitor, the other end of the electric capacitor is respectively with IGBT1's
Emitter stage and IGBT3 colelctor electrode connection, the transmitting of one end of the equivalent resistance respectively with IGBT3 emitter stage and IGBT4
Pole is connected, and the negative pole of the other end and Li-ion batteries piles is connected.
On the basis of above-mentioned technical proposal, the equivalent resistance is Li-ion batteries piles internal resistance, switching tube internal resistance, inductance
The summation of internal resistance, electric capacitor internal resistance, contactor internal resistance and circuit internal resistance.
On the basis of above-mentioned technical proposal, the contactor is used for the access and excision for controlling power supply.
On the basis of above-mentioned technical proposal, circuit is controlled to include described in step S6：DSP microcontrollers, signal detection
Circuit, drive circuit and protection circuit.
On the basis of above-mentioned technical proposal, in step S7, during low temperature self-heating, as battery temperature is raised, electricity
Pond internal resistance is gradually reduced, and serial-resonant inverter circuit adaptively increases the amplitude of simple sinusoidal alternating current, battery pack heating speed
Rate is accelerated.
On the basis of above-mentioned technical proposal, the lithium ion battery includes lithium manganate power battery, cobalt acid lithium power electric
The electrokinetic cells such as pond, metatitanic acid lithium dynamical battery, lithium iron phosphate dynamic battery and ternary material electrokinetic cell.
Beneficial effect：
1st, Li-ion batteries piles low temperature self-heating method of the present invention, with oneself adds to Li-ion batteries piles under low temperature
Hot speed is fast, cryogenic property improves obvious, self-heating efficiency high, equal without influence and heating-up temperature on lithium ion battery service life
Even property is good and other effects；
2nd, optimal heat production frequency is selected, rate of heat production is most fast, and the self-heating time substantially shortens；
3rd, determine to take into account battery aging status and battery SOC most based on the EIS under different ageing states and state-of-charge
Excellent heating frequency scope；
4th, the serial-resonant inverter circuit of design, switching loss is essentially 0, battery pack self-heating apparatus efficiency high；
5th, the internal resistance of lithium ion battery significantly reduces after self-heating, and serial-resonant inverter circuit can adaptively increase
The amplitude of big simple sinusoidal alternating current, quickly to improve battery temperature；
6th, polarizing voltage of this method to influence lithium ion battery service life selects optimal heat production frequency as restrictive condition
Rate, so that on the basis of rapidly heating lithium ion battery, realization reduces to lithium ion battery service life to greatest extent
The target of influence；
7th, the heating means are from inside lithium ion cell self-heating, and internal temperature of lithium ion battery uniformity is good.
Brief description of the drawings
The present invention has drawings described below：
Fig. 1 is the EIS figures of the different ageing states of 35Ah batteries at -20 DEG C；
Fig. 2 is the EIS figures of 35Ah batteries difference SOC at -20 DEG C；
Fig. 3 is the heat production rate and current ratio figure of the 35Ah batteries of different ageing states at -20 DEG C；
Fig. 4 is the heat production rate and current ratio figure of difference SOC 35Ah batteries at -20 DEG C；
Fig. 5 is serial-resonant inverter circuit schematic diagram；
Fig. 6 is the battery side electric current, inductive current and cell voltage figure of serial-resonant inverter circuit；
Fig. 7 is battery temperature rise figure in heating process；
Fig. 8 is the schematic diagram of battery pack low temperature self-heating method.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
A kind of Li-ion batteries piles low temperature self-heating method, comprises the following steps：
The EIS of different ageing state batteries, determines the optimal heating frequency of different ageing state batteries under S1, test low temperature
Scope；
The EIS of different state-of-charge (SOC) batteries, determines the optimal heating frequency of different SOC batteries under S2, test low temperature
Scope；
S3, determination take into account the scope of the optimal heating frequency of battery aging status and battery SOC；
S4, consideration circuit efficiency, control complexity and reliability factor, occur circuit to simple sinusoidal alternating current and select
Type, is defined as serial-resonant inverter circuit；
S5, according to optimal heating frequency scope and the requirement of self-heating time, select the frequency and width of simple sinusoidal alternating current
Value, designs the main circuit of serial-resonant inverter circuit, determines each device parameters and switching tube model accordingly；
S6, the control circuit for designing serial-resonant inverter circuit, are controlled to serial-resonant inverter circuit, it is ensured that
Battery side exports the simple sinusoidal alternating current of target frequency and target amplitude；
S7, the simple sinusoidal alternating current exported using serial-resonant inverter circuit carry out low temperature self-heating to battery pack；
S8, when battery pack temperature reaches target temperature, lockout switch pipe pulse forbids simple sinusoidal alternating current to export.
On the basis of above-mentioned technical proposal, in step S5, the switching tube of the serial-resonant inverter circuit is in zero electricity
During stream shut-off with it is open-minded, switching loss is close to 0.
On the basis of above-mentioned technical proposal, the switching tube includes IGBT1, IGBT2, IGBT3 and IGBT4.
On the basis of above-mentioned technical proposal, main circuit includes described in step S5：IGBT1、IGBT2、IGBT3、
IGBT4, electric capacitor, inductance, equivalent resistance and contactor；The positive pole of the Li-ion batteries piles is connected with contactor, contact
Device is connected with IGBT1 colelctor electrode and IGBT 2 colelctor electrode respectively, and one end of the inductance connects IGBT2 emitter stage respectively
With IGBT4 colelctor electrode, one end connection of the other end and electric capacitor, the other end of the electric capacitor is respectively with IGBT1's
Emitter stage and IGBT3 colelctor electrode connection, the transmitting of one end of the equivalent resistance respectively with IGBT3 emitter stage and IGBT4
Pole is connected, and the negative pole of the other end and Li-ion batteries piles is connected.
On the basis of above-mentioned technical proposal, the equivalent resistance is Li-ion batteries piles internal resistance, switching tube internal resistance, inductance
The summation of internal resistance, electric capacitor internal resistance, contactor internal resistance and circuit internal resistance.
On the basis of above-mentioned technical proposal, the contactor is used for the access and excision for controlling power supply.
On the basis of above-mentioned technical proposal, circuit is controlled to include described in step S6：DSP microcontrollers, signal detection
Circuit, drive circuit and protection circuit.
On the basis of above-mentioned technical proposal, in step S7, during low temperature self-heating, as battery temperature is raised, electricity
Pond internal resistance is gradually reduced, and serial-resonant inverter circuit adaptively increases the amplitude of simple sinusoidal alternating current, battery pack heating speed
Rate is accelerated.
On the basis of above-mentioned technical proposal, the lithium ion battery includes lithium manganate power battery, cobalt acid lithium power electric
The electrokinetic cells such as pond, metatitanic acid lithium dynamical battery, lithium iron phosphate dynamic battery and ternary material electrokinetic cell.
Specific examples below is illustrated by taking ternary-LiMn2O4 mixing material electrokinetic cell as an example.
In the charge and discharge process of battery there is polarizing voltage in battery, and polarizing voltage is used to describe the physics in battery and change
Process, is the electricity with the matter transportation limitation in electrode material solid phase, the contact obstruction between solid phase and sluggishness in electrolyte
Caused by chemical reaction.Battery impedance is significantly increased under low temperature, if Fig. 1 is 35Ah ternarys-LiMn2O4 mixing material lithium at -20 DEG C
EIS figure of the ion battery in different ageing states, as seen from Figure 1, battery impedance is not bright with cell degradation
Aobvious relation.Fig. 2 is EIS figure of the 35Ah ternarys-LiMn2O4 mixing material lithium-ion-power cell in different SOC at -20 DEG C,
As seen from Figure 2, the lower battery impedances of SOC are bigger.
In order to reach the purpose of quick heating battery under low temperature, the larger overpotential of acquisition and electric current are always expected.Polarization
Voltage magnitude is bigger, and electric current is bigger, in heating process, and internal rate of heat production is bigger, and correspondingly the heat time is shorter.
But, excessive polarizing voltage may cause unfavorable situation, and such as battery terminal voltage causes to overcharge or mistake beyond safe voltage thresholds
Put, this will trigger battery side reaction, cause lithium ion to deposit to form Li dendrite or cause inside battery to be lived in negative terminal surface
Property material loss, this will accelerate the decline of battery life.Therefore, constant alternating polarity voltage is to realize quickly heat excellent
Scheme is selected, can effectively prevent battery terminal voltage from exceeding safe voltage thresholds, and then correspondingly can in real time be counted according to battery impedance
Calculate maximum alternating current amplitude.
When battery apply simple sinusoidal alternating current when, only can not backheating need consider, including ohmic polarization heat, electrochemistry pole
Change hot and diffusion polarization heat, be almost 0 negligible in a simple sinusoidal alternating current cycle inside irreversible heat, can not backheating Q
It is represented by
Wherein, Δ V is the peak value of simple alternating current polarizing voltage, and w is angular frequency, Re=f (w) represents real impedance and angular frequency
The functional relation of rate, Z=g (w) represents battery total impedance and the functional relation of angular frequency, and I is simple sinusoidal alternating current amplitude.
The relation of battery heat production rate and frequency is just can obtain according to (1) formula, polarizing voltage is bigger, under same impedance,
Electric current will be bigger, and the quantity of heat production of battery is also bigger, and heat production rate with the increase of polarizing voltage with square relation increase；
In certain frequency range, heat production rate increases with the increase of frequency；After certain frequency, heat production rate with frequency increase
And reduce, therefore there is the rate of heat addition most fast optimal frequency.
Functional relation g (w) and f (w) with angular frequency w is built to the battery total impedance in EIS and real impedance,
Pass of the heat production rate in the case where polarizing voltage is certain with frequency is calculated in MATLAB (matrix labotstory) software for mathematical computing
System.When polarizing voltage is 0.1V, the batteries of different ageing states different frequency heat production rate and current ratio such as Fig. 3, it is low
Although the impedance of frequency area is very big, electric current is smaller, and heat production rate is relatively low；Near the maximum Frequency point of heat production rate, battery capacity is bigger, electricity
Pond impedance is smaller, and electric current is bigger, and heat production rate is bigger；Heat production rate and current ratio such as figure of the different SOC battery in different frequency
4, near the maximum Frequency point of heat production rate, smaller by the electric current of battery with SOC increase, heat production rate is smaller.
Table 1 is analyzed for different decline capacity and different SOC maximum heat production, with the aging of battery, maximum heat production point
Frequency gradually increases；With SOC increase, the frequency of maximum heat production point gradually increases.By experiment test, no matter battery
How much is decline, and no matter each battery SOC of battery pack differs much, all there is the frequency model that a common heat production is more than 90%
Enclose, select a frequency just to realize the quick heating to battery pack in the frequency range.That is battery pack is most
The ageing state of excellent heating frequency and battery, SOC correlations are smaller, so that it is determined that taking into account battery aging status and battery SOC
Optimal heating frequency scope.
The maximum heat production analysis of the different decline capacity of table 1 and different SOC batteries
In order to which battery pack is increased into 5 DEG C in 20min from -20 DEG C, should design frequency be that 1kHz, peak value are 220A's
There are following characteristics in simple sinusoidal alternating current, self-heating process：
(1) electric current is larger, should try one's best and reduce the internal resistance of self-heating apparatus (serial-resonant inverter circuit), to reduce damage
Consumption, improves efficiency；
(2) the optimal heating frequency of battery pack changes little with the ageing state and SOC of battery；
(3) as temperature is raised, current amplitude is gradually increased.
Full bridge inverter output simple sinusoidal alternating current amplitude, frequency-adjustable, but battery pack optimal heating frequency with
Ageing state and the SOC change of battery are little；The current amplitude and frequency of serial-resonant inverter circuit output are non-adjustable, by electricity
Inductance, electric capacitor and equivalent internal resistance are determined in road, and serial-resonant inverter circuit has the advantage that：
(1) contactor frequency is low, and switching frequency is the half of simple sinusoidal alternating current frequency；
(2) contactor loss is small, it is ensured that is switched in zero current, is natural Sofe Switch；
(3) control that simply, only complementary pulse need to be exported；
(4) external power source excitation is not needed；
(5) as temperature is raised, the internal resistance of cell reduces, and current amplitude gradually increases；
According to the actual demand of self-heating, serial-resonant inverter circuit, such as Fig. 5 are selected.It is readily apparent that, when system is always interior
Resistance is metWhen, LC serial-resonants inverter circuit produces oscillating discharge process, RoFor total internal resistance, L is inductance, and C is
Electric capacity.According to target current, 16.887uH inductance, maximum current 300A are selected；Select the maximum pressure-resistant 500V of electric capacity, capacitance
For 500uF, three electric capacity parallel connections are obtained to 1500uF bipolarity electric capacity；Using IPM modules (SPM) as opening
Guan Guan, switching frequency control is 500Hz.
Inductive current, battery current and cell voltage such as Fig. 6 in serial-resonant inverter circuit, battery current peak value is
324A, valley is -196A, and the current oscillation cycle is T=0.000966s, and frequency is 1035Hz, meets design object.
The simple sinusoidal alternating current exported with serial-resonant inverter circuit is heated to 6 string battery packs, in heating process
6 string battery packs can be heated to 5 DEG C from -20 DEG C such as Fig. 7 by battery temperature change in 25 minutes.
In summary, the Li-ion batteries piles self-heating method may be implemented in 25min and battery pack be heated into 5 from -20 DEG C
DEG C, battery performance will be obviously improved after self-heating, to solve the possibility that the difficult problem of low temperature charging provides Project Realization；Battery pack
Self-heating process show the self-heating method can not only rapidly self-heating battery to suitable services temperature, to realize low temperature
The lower quick charge without aging effects provides possibility, and illustrates that self-heating apparatus (serial-resonant inverter circuit) works
High efficiency, reliability, will promote electric automobile cold district popularization and application.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all embodiments can not be exhaustive here, it is every to belong to this hair
Row of the obvious changes or variations that bright technical scheme is extended out still in protection scope of the present invention.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (9)
1. a kind of Li-ion batteries piles low temperature self-heating method, it is characterised in that：Comprise the following steps：
The EIS of different ageing state batteries, determines the model of the optimal heating frequency of different ageing state batteries under S1, test low temperature
Enclose；
The EIS of different state-of-charge batteries, determines the model of the optimal heating frequency of different state-of-charge batteries under S2, test low temperature
Enclose；
S3, determination take into account the scope of the optimal heating frequency of battery aging status and battery charge state；
S4, consideration circuit efficiency, control complexity and reliability factor, occur circuit to simple sinusoidal alternating current and carry out type selecting, really
It is set to serial-resonant inverter circuit；
S5, according to optimal heating frequency scope and the requirement of self-heating time, select the frequency and amplitude of simple sinusoidal alternating current, according to
The main circuit of this design serial-resonant inverter circuit, determines each device parameters and switching tube model；
S6, the control circuit for designing serial-resonant inverter circuit, are controlled, it is ensured that battery to serial-resonant inverter circuit
Side exports the simple sinusoidal alternating current of target frequency and target amplitude；
S7, the simple sinusoidal alternating current exported using serial-resonant inverter circuit carry out low temperature self-heating to battery pack；
S8, when battery pack temperature reaches target temperature, lockout switch pipe pulse forbids simple sinusoidal alternating current to export.
2. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 1, it is characterised in that：In step S5, institute
State serial-resonant inverter circuit switching tube turned off in zero current with it is open-minded.
3. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 1, it is characterised in that：The switching tube bag
Include IGBT1, IGBT2, IGBT3 and IGBT4.
4. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 3, it is characterised in that：Described in step S5
Main circuit includes：IGBT1, IGBT2, IGBT3, IGBT4, electric capacitor, inductance, equivalent resistance and contactor；The lithium ion
The positive pole of battery pack is connected with contactor, and contactor is connected with IGBT1 colelctor electrode and IGBT2 colelctor electrode respectively, the electricity
One end of sense connects IGBT2 emitter stage and IGBT4 colelctor electrode respectively, and one end connection of the other end and electric capacitor is described
The other end of electric capacitor is connected with IGBT1 emitter stage and IGBT3 colelctor electrode respectively, one end difference of the equivalent resistance
It is connected with IGBT3 emitter stage and IGBT4 emitter stage, the negative pole connection of the other end and Li-ion batteries piles.
5. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 4, it is characterised in that：The equivalent resistance
For the total of Li-ion batteries piles internal resistance, switching tube internal resistance, inductance internal resistance, electric capacitor internal resistance, contactor internal resistance and circuit internal resistance
With.
6. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 4, it is characterised in that：The contactor is used
In the access and excision of control power supply.
7. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 1, it is characterised in that：Described in step S6
Control circuit includes：DSP microcontrollers, signal deteching circuit, drive circuit and protection circuit.
8. a kind of Li-ion batteries piles low temperature self-heating method as claimed in claim 1, it is characterised in that：It is low in step S7
During warm self-heating, as battery temperature is raised, the internal resistance of cell is gradually reduced, and serial-resonant inverter circuit adaptively increases
The amplitude of big simple sinusoidal alternating current, the battery pack rate of heat addition is accelerated.
9. a kind of Li-ion batteries piles low temperature self-heating method as described in claim 1-8 any claims, its feature exists
In：The lithium ion battery includes lithium manganate power battery, cobalt acid lithium electrokinetic cell, metatitanic acid lithium dynamical battery, LiFePO4 and moved
Power battery or ternary material electrokinetic cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071787.6A CN107039708B (en) | 2016-11-29 | 2016-11-29 | A kind of Li-ion batteries piles low temperature self-heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611071787.6A CN107039708B (en) | 2016-11-29 | 2016-11-29 | A kind of Li-ion batteries piles low temperature self-heating method |
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| CN108595729A (en) * | 2018-01-08 | 2018-09-28 | 北京理工大学 | A kind of power battery intelligence self-regulation heated current computational methods, battery heating means and battery management system based on BV equations |
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| CN112186830A (en) * | 2020-08-31 | 2021-01-05 | 傲普(上海)新能源有限公司 | Method for improving performance of lithium battery at low temperature |
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| CN112736327A (en) * | 2021-01-11 | 2021-04-30 | 河北工业大学 | Low temperature battery pack heating device based on LC resonance |
| CN112883596A (en) * | 2021-04-28 | 2021-06-01 | 东南大学 | High-efficiency working method of battery energy storage system at low temperature |
| CN113162141A (en) * | 2021-03-17 | 2021-07-23 | 北京理工大学 | Portable safe charging system and method for lithium battery suitable for low-temperature environment |
| CN113346164A (en) * | 2021-05-20 | 2021-09-03 | 山东大学 | Intelligent flexible preheating method and system for power battery of electric automobile in cold region |
| CN113540620A (en) * | 2021-07-07 | 2021-10-22 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Electric vehicle battery heating method, electronic device and storage medium |
| CN113540621A (en) * | 2021-07-20 | 2021-10-22 | 福建工程学院 | Sine alternating-current low-temperature self-heating device and method for lithium battery |
| CN113650486A (en) * | 2021-09-03 | 2021-11-16 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Self-heating method and device for vehicle battery |
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| CN107994299A (en) * | 2017-12-07 | 2018-05-04 | 山东大学 | Full-time crisscross parallel heating topological circuit of vehicle mounted dynamic battery low temperature and its application |
| CN107845840A (en) * | 2017-12-07 | 2018-03-27 | 上汽大众汽车有限公司 | Battery heater circuit |
| CN108595729A (en) * | 2018-01-08 | 2018-09-28 | 北京理工大学 | A kind of power battery intelligence self-regulation heated current computational methods, battery heating means and battery management system based on BV equations |
| CN109449541A (en) * | 2018-09-26 | 2019-03-08 | 北京交通大学 | Lithium ion battery Converting frequency & amplitude exchanges low temperature self-heating method |
| CN111355434A (en) * | 2018-12-21 | 2020-06-30 | 比亚迪股份有限公司 | Motor control circuit, vehicle and heating method thereof |
| CN111355434B (en) * | 2018-12-21 | 2021-06-18 | 比亚迪股份有限公司 | Motor control circuit, vehicle and heating method thereof |
| CN109950660B (en) * | 2019-03-25 | 2022-01-18 | 清华大学 | Method for preheating ternary lithium ion power battery by utilizing self energy storage excitation |
| CN109786897A (en) * | 2019-03-25 | 2019-05-21 | 哈尔滨理工大学 | A kind of lithium ion battery alternating excitation low-temperature heating method based on temperature change |
| CN109950660A (en) * | 2019-03-25 | 2019-06-28 | 清华大学 | The method that ternary lithium-ion-power cell is preheated using itself energy storage excitation |
| CN109786897B (en) * | 2019-03-25 | 2021-12-03 | 哈尔滨理工大学 | Lithium ion battery alternating excitation low-temperature heating method based on temperature change |
| US11515588B2 (en) | 2019-05-28 | 2022-11-29 | Contemporary Amperex Technology Co., Limited | Heating method for rechargeable battery, control unit and heating circuit |
| JP2020194766A (en) * | 2019-05-28 | 2020-12-03 | 寧徳時代新能源科技股▲分▼有限公司Ｃｏｎｔｅｍｐｏｒａｒｙ Ａｍｐｅｒｅｘ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｉｍｉｔｅｄ | Heating method for rechargeable battery, control unit, and heating circuit |
| CN110970691B (en) * | 2019-05-28 | 2021-10-22 | 宁德时代新能源科技股份有限公司 | Heating method, control unit and heating circuit of rechargeable battery |
| WO2020238468A1 (en) * | 2019-05-28 | 2020-12-03 | 宁德时代新能源科技股份有限公司 | Heating method for rechargeable battery, control unit, and heating circuit |
| CN110970691A (en) * | 2019-05-28 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Heating method, control unit and heating circuit of rechargeable battery |
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| CN111391710A (en) * | 2020-06-04 | 2020-07-10 | 比亚迪股份有限公司 | Vehicle working mode switching control method and device and vehicle |
| CN113904025A (en) * | 2020-06-22 | 2022-01-07 | 比亚迪股份有限公司 | Power battery self-heating control method and system and automobile |
| CN113904026A (en) * | 2020-06-22 | 2022-01-07 | 比亚迪股份有限公司 | Power battery self-heating control method and system and automobile |
| CN114062949B (en) * | 2020-07-29 | 2023-03-24 | 比亚迪股份有限公司 | Battery state of charge estimation method, device and equipment |
| CN114062949A (en) * | 2020-07-29 | 2022-02-18 | 比亚迪股份有限公司 | Battery state of charge estimation method, device and equipment |
| CN114069102A (en) * | 2020-07-31 | 2022-02-18 | 比亚迪股份有限公司 | Self-heating method, device and system of power battery and electric vehicle |
| CN112186830A (en) * | 2020-08-31 | 2021-01-05 | 傲普(上海)新能源有限公司 | Method for improving performance of lithium battery at low temperature |
| CN114335812A (en) * | 2020-09-30 | 2022-04-12 | 通用汽车环球科技运作有限责任公司 | Structure for self-heating of battery |
| CN114335812B (en) * | 2020-09-30 | 2024-05-14 | 通用汽车环球科技运作有限责任公司 | Structure for self-heating of battery |
| CN112420389A (en) * | 2020-11-09 | 2021-02-26 | 安徽富航电子科技发展有限公司 | Laminated mica capacitor and production process thereof |
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| CN113540621A (en) * | 2021-07-20 | 2021-10-22 | 福建工程学院 | Sine alternating-current low-temperature self-heating device and method for lithium battery |
| CN113650486A (en) * | 2021-09-03 | 2021-11-16 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Self-heating method and device for vehicle battery |
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| CN114388941A (en) * | 2022-01-14 | 2022-04-22 | 中国人民解放军国防科技大学 | Parameter selection method and device for low-temperature lossless alternating current self-heating of battery |
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| CN115224397A (en) * | 2022-08-26 | 2022-10-21 | 阿维塔科技(重庆)有限公司 | Battery package self-heating circuit and car |
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