CN113098115A - Resonant series battery voltage-sharing circuit based on multi-port transformer and implementation method - Google Patents
Resonant series battery voltage-sharing circuit based on multi-port transformer and implementation method Download PDFInfo
- Publication number
- CN113098115A CN113098115A CN202110645083.XA CN202110645083A CN113098115A CN 113098115 A CN113098115 A CN 113098115A CN 202110645083 A CN202110645083 A CN 202110645083A CN 113098115 A CN113098115 A CN 113098115A
- Authority
- CN
- China
- Prior art keywords
- voltage
- resonant
- sharing
- battery
- secondary side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- 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
-
- 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 invention discloses a resonant series battery voltage-sharing circuit based on a multi-port transformer and an implementation method thereofC 1AndC 2and a primary side switching tubeS A AndS B resonant inductorL p And a resonant capacitorC p A multi-port transformer T, andmand the module consists of a secondary side switching tube and a series battery pack. In the invention, each module forms a bidirectional resonant converter by combining a multi-port transformer with a primary side half-bridge circuit, and the resonant circuit is used for ensuring that the circuit still has high working frequencyThe voltage-sharing circuit device has high efficiency, and can effectively transfer energy among any number of batteries at any position while having high power density. In addition, the structure can be adjusted according to different application backgrounds, so that the invention is suitable for various application occasions. Finally, a voltage-sharing control strategy based on the circuit device is proposed to increase charging and discharging voltage-sharing current and accelerate voltage-sharing speed.
Description
Technical Field
The invention belongs to the field of battery voltage-sharing, and particularly relates to a resonant series battery voltage-sharing circuit based on a multi-port transformer and an implementation method.
Background
With the popularization of electric vehicles and various new energy technologies, various energy storage devices are widely applied to various systems, and the voltage of a single battery is low, so that the batteries need to be connected in series and in parallel to provide sufficient voltage level and power. The individual performance difference, namely the unbalance of the battery monomers, directly affects the overall capacity, service life and service efficiency of the battery pack. Without any battery voltage equalization measures, the performance, life and safety of the battery pack will be greatly reduced due to the non-uniform battery voltage. Experimental data shows that if the problem of voltage sharing of series batteries can be successfully solved, the available capacity of the batteries can be improved by 10% -20%.
Conventional voltage-sharing circuits include energy dissipation type circuits that consume excess battery energy using resistors, and energy transfer type circuits that use energy storage devices for energy transfer. The dissipative voltage-sharing circuit is simple in structure but low in efficiency, and the energy transfer circuit can reduce loss in the voltage-sharing process and can greatly accelerate the voltage-sharing speed of the circuit. However, the traditional energy transfer circuit only adopts a single inductor or a capacitor as a core component in an energy transmission path, so that the soft switching of a switching tube is difficult to realize, and finally, the efficiency of the circuit is low in high-frequency operation, and the high-frequency and miniaturization of a voltage-sharing circuit cannot be realized. The resonant series lithium battery voltage-sharing circuit based on the multi-port transformer is used as an energy transfer circuit, voltage sharing can be carried out on a large number of batteries at the same time, soft switching is achieved through the resonant circuit, and the frequency and the efficiency of the circuit are further improved.
Disclosure of Invention
Aiming at the defects in the prior art, the resonant series battery voltage-sharing circuit based on the multi-port transformer and the implementation method provided by the invention not only solve the problem of unbalanced voltage in the existing series battery pack, but also greatly improve the voltage-sharing speed, efficiency and power density of the circuit.
In order to achieve the aim, the technical scheme adopted by the invention is a resonant series battery voltage-sharing circuit based on a multiport transformer, which comprises a primary side circuit, the multiport transformer T and M secondary side circuit modules;
the primary side circuit comprises a capacitor C1Capacitor C2Switch tube SASwitch tube SBResonant inductor LPAnd a resonant capacitor CP；
The switch tube SAWith the positive electrode of the series battery pack in the 1 st secondary side circuit module and the capacitor C1Is connected with one end of a switching tube SARespectively with the resonant inductor LPAnd a switching tube SBIs connected to the drain of the switching tube SBWith the negative electrode of the series battery pack in the Mth secondary side circuit module and the capacitor C2Is connected to the capacitor C2The other end of each of the first and second capacitors is connected to a capacitor C1Another terminal of (1) and a resonant capacitor CPIs connected to the resonant inductor LPAnd the other end of the primary side coil T of the multi-port transformer TPIs connected to the resonant capacitor CPAnd the other end of the primary side coil T of the multi-port transformer TPThe other end of the first and second connecting rods is connected;
each secondary side circuit module comprises a switch tube Sm1Switch tube Sm2And battery Bm1And battery Bm2Said switch tube Sm1Drain electrode of and battery Bm1Is connected to the positive pole of the switching tube Sm1Respectively with the switching tube Sm2Multi-port transformer T1M secondary side coil T ofsmIs connected to the mth secondary side coil TsmIs respectively connected with the battery Bm2Positive electrode and battery Bm1Is connected to the negative pole of the switching tube Sm2Source electrode of and battery Sm2The negative electrode of (1) is connected;
batteries B in two adjacent secondary side circuit modules(m+1)2And battery Bm1Are connected in series;
wherein M =1, 2.
Further, the positive electrode of the series battery pack in the 1 st secondary side circuit module passes through HV + and a capacitor C1Is connected with the negative electrode of the series battery pack in the Mth secondary side circuit module through HV +, and a capacitor C2Is connected at one end.
Further, the resonant inductor LpAnd a resonance capacitor CpForming a resonant cavity of the resonant series battery voltage-sharing circuit.
A voltage-sharing implementation method for a resonance type series battery based on a multi-port transformer comprises the following steps:
s1, determining a voltage-sharing control targetεControl parameter, secondary side circuit module number M and upper limit of charging module numberm limitAnd voltage control thresholdδ；
S2, presetting switch tube SAAnd a switching tube SBThe duty ratios of the PWM signals are complementary;
s3, starting the resonant series battery voltage-sharing circuit, and collecting the voltages of two batteries in the target secondary side circuit moduleV Bi1AndV Bi2and calculating the average voltageV aveAnd the actual voltage standard deviation σ;
s4, judging whether the standard deviation sigma of the actual voltage is smaller than the voltage-sharing control target or notε；
If yes, go to step S5;
if not, go to step S6;
s5, signals of all switch tubes in the closed circuit are equalized;
s6, the signal of the switching tube in the secondary side circuit module is adjusted, and the process returns to step S3.
Further, the step S6 is specifically:
s61, grouping all the batteries in the secondary side circuit module, namely all the batteries Bm1Divided into group A, all cells Bm2Dividing into group B;
s62, sorting the batteries in the group A and the group B in an ascending order according to the voltage to obtain the voltage serial numbers corresponding to the batteries;
s63, assigning the lowest voltage values in the group A and the group B to a register;
wherein the lowest voltage value of A isV min1The lowest voltage value of group B isV min2；
S64, in A group and B group, the voltage number of each battery is judgedpxiWhether the voltage is less than the voltage serial number corresponding to the lowest voltage valuem limit；
If yes, go to step S65;
if not, go to step S66;
s65, in the group A and the group B, whether the difference value between the voltage corresponding to all the batteries meeting the conditions and the lowest voltage value in the corresponding group is smaller than or not is judged in sequenceδ；
If yes, go to step S67;
if not, go to step S66;
s66, turning off the switch tube corresponding to the voltage serial number, and returning to the step S3;
and S67, applying a PWM square wave driving signal to the switching tube corresponding to the battery, and returning to the step S3.
Further, in step S67, the amplitude of the PWM square-wave driving signal applied to the switching tube is greater than the threshold of the gate voltage of the switching tube.
The invention has the beneficial effects that:
(1) compared with the traditional voltage equalizing circuit based on the transformer, the resonant series battery voltage equalizing circuit based on the multi-port transformer still keeps high efficiency at higher frequency by introducing the series resonant circuit, so that the high power density of the voltage equalizing circuit can be ensured while the energy is efficiently transmitted among batteries in any positions and any number. In addition, the invention adopts the multi-port transformer to improve the upper limit of the number of the voltage-sharing batteries of the voltage-sharing device and further reduce the cost and the volume of the circuit. Meanwhile, the invention can be improved into other resonant charging and discharging converters by adjusting part of the structure according to different application occasions.
(2) The voltage-sharing realization method of the invention is to gradually increase the number of the rechargeable battery modules to the upper limit mlimitAnd the high average current of battery charging is obtained while the small discharge current of the whole battery is kept at the initial stage of voltage sharing. The number of battery modules which participate in charging is gradually increased and reaches the upper limit m of the number of charging groupslimitThen, most of the battery voltage to be charged increases to the average value of the battery voltage, and the average current to be discharged at this time increases to the maximum, and the battery voltage to be discharged starts to decrease rapidly. Through the control method, a large amount of loss is reduced while the average voltage-sharing current in the voltage-sharing process is improved, the voltage-sharing efficiency is improved, relevant parameters of the control strategy can be modified at any time when the voltage is shared, and the control method has good expansibility.
Drawings
Fig. 1 is a structural diagram of a resonant series battery voltage-sharing circuit based on a multi-port transformer according to the present invention.
Fig. 2 is a flow chart for realizing voltage-sharing of resonant series-connected batteries based on a multi-port transformer.
Fig. 3 is a signal adjustment flow chart of the switching tube in the secondary side circuit module according to the present invention.
Fig. 4 is a waveform diagram of the operation provided by the present invention.
Fig. 5 is a schematic diagram of the working mode 1 provided by the present invention.
Fig. 6 is a schematic diagram of the working mode 2 provided by the present invention.
Fig. 7 is a schematic diagram of the working mode 3 provided by the present invention.
Fig. 8 is a schematic diagram of the working mode 4 provided by the present invention.
Fig. 9 is a diagram of a battery voltage-sharing time-domain simulation waveform provided by the present invention.
Fig. 10 is a structural diagram of a series battery resonance type voltage-sharing charge-discharge machine according to the present invention.
Fig. 11 is a structural diagram of a bidirectional resonant converter in a distributed energy storage system according to the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1:
as shown in fig. 1, the resonant series battery voltage-sharing circuit based on the multi-port transformer comprises a primary side circuit, a multi-port transformer T and M secondary side circuit modules;
the primary side circuit comprises a capacitor C1Capacitor C2Switch tube SASwitch tube SBResonant inductor LPAnd a resonant capacitor CP；
The switch tube SAWith the positive electrode of the series battery pack in the 1 st secondary side circuit module and the capacitor C1Is connected with one end of a switching tube SARespectively with the resonant inductor LPAnd a switching tube SBIs connected to the drain of the switching tube SBWith the negative electrode of the series battery pack in the Mth secondary side circuit module and the capacitor C2Is connected to the capacitor C2The other end of each of the first and second capacitors is connected to a capacitor C1Another terminal of (1) and a resonant capacitor CPIs connected to the resonant inductor LPAnd the other end of the primary side coil T of the multi-port transformer TPIs connected at one end toResonant capacitor CPAnd the other end of the primary side coil T of the multi-port transformer TPThe other end of the first and second connecting rods is connected;
each secondary side circuit module comprises a switch tube Sm1Switch tube Sm2And battery Bm1And battery Bm2Said switch tube Sm1Drain electrode of and battery Bm1Is connected to the positive pole of the switching tube Sm1Respectively with the switching tube Sm2Multi-port transformer T1M secondary side coil T ofsmIs connected to the mth secondary side coil TsmIs respectively connected with the battery Bm2Positive electrode and battery Bm1Is connected to the negative pole of the switching tube Sm2Source electrode of and battery Sm2The negative electrode of (1) is connected;
batteries B in two adjacent secondary side circuit modules(m+1)2And battery Bm1Are connected in series;
wherein M =1, 2.
The resonant inductor LpAnd a resonance capacitor CpForming a resonant cavity of the resonant series battery voltage-sharing circuit. The anode of the series battery pack in the 1 st secondary side circuit module passes through HV + and a capacitor C1Is connected with the negative electrode of the series battery pack in the Mth secondary side circuit module through HV +, and a capacitor C2Is connected at one end.
Example 2:
in the voltage-sharing circuit, if a control strategy is not adopted, for example, only an upper switching tube and a lower switching tube in the same module are driven by a complementary method, the average charge-discharge current of the whole circuit is low, and the loss is high, so that the embodiment of the present invention provides a voltage-sharing implementation method, as shown in fig. 2, including the following steps:
s1, determining a voltage-sharing control targetεControl parameter, secondary side circuit module number M and upper limit of charging module numberm limitAnd voltage control thresholdδ；
S2, presetting switch tube SAAnd a switching tube SBThe duty ratios of the PWM signals are complementary;
S3、starting the resonant series battery voltage-sharing circuit, and collecting the voltages of two batteries in the target secondary side circuit moduleV Bi1AndV Bi2and calculating the average voltageV aveAnd the actual voltage standard deviation σ;
s4, judging whether the standard deviation sigma of the actual voltage is smaller than the voltage-sharing control target or notε；
If yes, go to step S5;
if not, go to step S6;
s5, signals of all switch tubes in the closed circuit are equalized;
s6, the signal of the switching tube in the secondary side circuit module is adjusted, and the process returns to step S3.
Specifically, as shown in fig. 3, the step S6 specifically includes:
s61, grouping all the batteries in the secondary side circuit module, namely all the batteries Bm1Divided into group A, all cells Bm2Dividing into group B;
s62, sorting the batteries in the group A and the group B in an ascending order according to the voltage to obtain the voltage serial numbers corresponding to the batteries;
s63, assigning the lowest voltage values in the group A and the group B to a register;
wherein the lowest voltage value of A isV min1The lowest voltage value of group B isV min2；
S64, in A group and B group, the voltage number of each battery is judgedpxiWhether the voltage is less than the voltage serial number corresponding to the lowest voltage valuem limit；
Take group A as an example, ifpxi< m limitIf so, carrying out the next judgment, otherwise, giving a zero level signal to the corresponding switching tube, and the even battery pack B is in the same way;
if yes, go to step S65;
if not, go to step S66;
s65, in the group A and the group B, whether the difference value between the voltage corresponding to all the batteries meeting the conditions and the lowest voltage value in the corresponding group is smaller than or not is judged in sequenceδ；
If yes, go to step S67;
if not, go to step S66;
s66, turning off the switch tube corresponding to the voltage serial number, and returning to the step S3;
and S67, applying a PWM square wave driving signal to the switching tube corresponding to the battery, and returning to the step S3.
The amplitude of the PWM square wave driving signal given to the switching tube is larger than the gate voltage threshold of the switching tube.
The following will take a circuit without the above control strategy as an example to illustrate the main operation mode and features of the circuit, and the detailed waveform diagram is shown in fig. 4:
stage 1 (t 0 ~t 1): as shown in figure 5 of the drawings,t 0the time excitation current decreases linearly and inversely while providing current to the primary side and secondary side circuits, respectively. In the primary side module, the current passesS A The reverse diode afterflows to switch the primary side of the switch tubeS A Is/are as followsV DS The voltage is clamped to zero level to provide conditions for ZVS in the next stage. In the secondary side module, current flows through a body diode of the upper position switch tube, and uncontrolled rectification is realized by the secondary side module. Since the voltage and current on the inductive device are reversed at this stage, the trend of the current is shown to decrease and approach zero.
Stage 2 (t 1 ~t 2): as shown in figure 6 of the drawings,t 1time switch tubeS A Zero voltage is conducted, the resonant cavity current is positively increased in a sine wave form and is reduced after reaching the maximum value,t 2the resonant current is reduced to be equal to the excitation current at the moment. The secondary side switch tube is subjected to uncontrolled rectification, and the current value is the difference value of the primary side resonance current and the excitation current, tot 2At the moment, the current in the secondary side module is reduced to zero, and the stage 2 is finished.
Stage 3 (t 2 ~t 3): as shown in figure 7 of the drawings,t 2at the beginning of the moment, the three devices of the excitation inductor, the resonance inductor and the resonance capacitor participate in resonance together, and the excitation current and the resonance current are kept consistent. This stageOnly in the sub-resonant state.
Stage 4 (t 3 ~t 4): as shown in figure 8 of the drawings,t 3time, switch tubeS A The excitation current can not suddenly change when the switch is turned off, and the excitation current continuously flows through the parasitic capacitance of the switching tubeS A Charging the capacitor ofS B The capacitor of (2) is discharged. Port voltageV abFrom +0.5V strBecomes-0.5V str。
The above four phases are combined to form the working principle of the upper half cycle, and the working principle of the lower half cycle is basically consistent with that of the upper half cycle, which is not described in detail herein. The cell voltage equalization detail waveform is shown in fig. 9.
In addition, the resonant type voltage-sharing circuit can be modified according to the application in the specific embodiment, and one of the two modifications is that as shown in fig. 10, the resonant type voltage-sharing charger facing the multi-battery series battery string is formed by canceling the connection of HV + and HV-, and adding an input source from the capacitor side.
Alternatively, as shown in fig. 11, the present invention can be utilized to charge and discharge a plurality of energy storage units in a distributed energy storage system at the same time by removing the connection between HV + and HV-and the battery string and adding an input source from the capacitor side.
The working modes of the two application examples are basically the same as those described above, and are not described herein.
Claims (6)
1. The resonant series battery voltage-sharing circuit based on the multi-port transformer is characterized by comprising a primary side circuit, a multi-port transformer T and M secondary side circuit modules;
the primary side circuit comprises a capacitor C1Capacitor C2Switch tube SASwitch tube SBResonant inductor LPAnd a resonant capacitor CP；
The switch tube SAWith the positive electrode of the series battery pack in the 1 st secondary side circuit module and the capacitor C1Is connected with one end of a switching tube SARespectively with the source electrode ofResonant inductor LPAnd a switching tube SBIs connected to the drain of the switching tube SBWith the negative electrode of the series battery pack in the Mth secondary side circuit module and the capacitor C2Is connected to the capacitor C2The other end of each of the first and second capacitors is connected to a capacitor C1Another terminal of (1) and a resonant capacitor CPIs connected to the resonant inductor LPAnd the other end of the primary side coil T of the multi-port transformer TPIs connected to the resonant capacitor CPAnd the other end of the primary side coil T of the multi-port transformer TPThe other end of the first and second connecting rods is connected;
each secondary side circuit module comprises a switch tube Sm1Switch tube Sm2And battery Bm1And battery Bm2Said switch tube Sm1Drain electrode of and battery Bm1Is connected to the positive pole of the switching tube Sm1Respectively with the switching tube Sm2Multi-port transformer T1M secondary side coil T ofsmIs connected to the mth secondary side coil TsmIs respectively connected with the battery Bm2Positive electrode and battery Bm1Is connected to the negative pole of the switching tube Sm2Source electrode of and battery Sm2The negative electrode of (1) is connected;
batteries B in two adjacent secondary side circuit modules(m+1)2And battery Bm1Are connected in series;
wherein M =1, 2.
2. A resonant series battery equalizer circuit based on multiport transformer according to claim 1, wherein the positive pole of the series battery in the 1 st of said secondary side circuit modules is connected to the capacitor C through HV +1Is connected with the negative electrode of the series battery pack in the Mth secondary side circuit module through HV +, and a capacitor C2Is connected at one end.
3. A resonant type series battery grading circuit based on a multiport transformer according to claim 1, characterized in that said resonant inductance LpHarmonyVibration capacitor CpForming a resonant cavity of the resonant series battery voltage-sharing circuit.
4. A voltage-sharing implementation method of a resonant type series battery voltage-sharing circuit based on a multi-port transformer is characterized by comprising the following steps:
s1, determining a voltage-sharing control targetεControl parameter, secondary side circuit module number M and upper limit of charging module numberm limitAnd voltage control thresholdδ；
S2, presetting switch tube SAAnd a switching tube SBThe duty ratios of the PWM signals are complementary;
s3, starting the resonant series battery voltage-sharing circuit, and collecting the voltages of two batteries in the target secondary side circuit moduleV Bi1AndV Bi2and calculating the average voltageV aveAnd the actual voltage standard deviation σ;
s4, judging whether the standard deviation sigma of the actual voltage is smaller than the voltage-sharing control target or notε；
If yes, go to step S5;
if not, go to step S6;
s5, signals of all switch tubes in the closed circuit are equalized;
s6, the signal of the switching tube in the secondary side circuit module is adjusted, and the process returns to step S3.
5. The voltage-sharing implementation method according to claim 4, wherein the step S6 specifically includes:
s61, grouping all the batteries in the secondary side circuit module, namely all the batteries Bm1Divided into group A, all cells Bm2Dividing into group B;
s62, sorting the batteries in the group A and the group B in an ascending order according to the voltage to obtain the voltage serial numbers corresponding to the batteries;
s63, assigning the lowest voltage values in the group A and the group B to a register;
wherein, the lowest voltage value of AIs a Vmin1The lowest voltage value of group B isV min2；
S64, in A group and B group, the voltage number of each battery is judgedpxiWhether the voltage is less than the voltage serial number corresponding to the lowest voltage valuem limit；
If yes, go to step S65;
if not, go to step S66;
s65, in the group A and the group B, whether the difference value between the voltage corresponding to all the batteries meeting the conditions and the lowest voltage value in the corresponding group is smaller than or not is judged in sequenceδ；
If yes, go to step S67;
if not, go to step S66;
s66, turning off the switch tube corresponding to the voltage serial number, and returning to the step S3;
and S67, applying a PWM square wave driving signal to the switching tube corresponding to the battery, and returning to the step S3.
6. The voltage-sharing implementation method according to claim 5, wherein in step S67, the amplitude of the PWM square-wave driving signal applied to the switch tube is greater than the gate-level voltage threshold of the switch tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110645083.XA CN113098115B (en) | 2021-06-10 | 2021-06-10 | Resonant series battery voltage-sharing circuit based on multi-port transformer and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110645083.XA CN113098115B (en) | 2021-06-10 | 2021-06-10 | Resonant series battery voltage-sharing circuit based on multi-port transformer and implementation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113098115A true CN113098115A (en) | 2021-07-09 |
| CN113098115B CN113098115B (en) | 2021-08-17 |
Family
ID=76665985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110645083.XA Active CN113098115B (en) | 2021-06-10 | 2021-06-10 | Resonant series battery voltage-sharing circuit based on multi-port transformer and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113098115B (en) |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050185429A1 (en) * | 2004-02-24 | 2005-08-25 | Patrizio Vinciarelli | Adaptively configured voltage transformation module array |
| CN101771351A (en) * | 2009-01-07 | 2010-07-07 | 力博特公司 | Three-phase tri-level LLC resonant converter |
| CN201957320U (en) * | 2011-04-03 | 2011-08-31 | 阮树成 | DC low-voltage power supply eight-bridge oscillation power synthesis high-voltage sodium lamp |
| CN102237799A (en) * | 2011-07-12 | 2011-11-09 | 珠海泰坦新能源系统有限公司 | Three-level resonant converter clamped by resonant capacitor and transformer primary side |
| CN102624243A (en) * | 2012-04-19 | 2012-08-01 | 中国矿业大学(北京) | Isolation-type half-bridge three-level dual-direction direct-current/direct-current (DC/DC) converter |
| JP2014176226A (en) * | 2013-03-11 | 2014-09-22 | Sumitomo Electric Ind Ltd | Dc/dc converter and distributed power supply system |
| CN104377778A (en) * | 2014-11-26 | 2015-02-25 | 山东大学 | Adjacent-Cell-to-Cell equalization circuit based on LCL resonant transformation and implementation method |
| CN104410133A (en) * | 2014-12-19 | 2015-03-11 | 山东大学 | Equalization circuit based on Buck-Boost convertor and bidirectional LC (inductance capacitance) resonant convertor as well as implementation method |
| CN106602880A (en) * | 2016-10-28 | 2017-04-26 | 深圳朗兴智能云充有限公司 | Large power high efficiency thermal equilibrium LLC resonant converter and control method thereof |
| CN107658948A (en) * | 2017-11-10 | 2018-02-02 | 国网江苏省电力公司泰州供电公司 | A kind of battery pack balancing charging circuit and its control structure |
| CN107825973A (en) * | 2017-12-22 | 2018-03-23 | 东南大学 | Novel electric vehicle charging circuit and its control method |
| US20180140859A1 (en) * | 2016-11-23 | 2018-05-24 | Marian MEIR | Device and method for generating electrical stimulation |
| CN108900097A (en) * | 2018-09-10 | 2018-11-27 | 西南交通大学 | A kind of controlled resonant converter |
| CN109617419A (en) * | 2019-01-07 | 2019-04-12 | 浙江大学 | A kind of three port DC-DC converter of isolated form |
| CN110380493A (en) * | 2019-08-29 | 2019-10-25 | 西南交通大学 | A kind of serial lithium battery equalizer circuit |
| CN110429683A (en) * | 2019-08-19 | 2019-11-08 | 张振明 | The efficient charging method of battery and charging circuit |
| CN110649812A (en) * | 2019-09-06 | 2020-01-03 | 广州金升阳科技有限公司 | Wide-gain-range LLC resonant converter and control method thereof |
| CN111697837A (en) * | 2020-05-18 | 2020-09-22 | 西安许继电力电子技术有限公司 | Direct-current transformer topology based on three-level CLLLC resonant converter and control method |
| CN111987759A (en) * | 2020-07-21 | 2020-11-24 | 河海大学 | Active equalization topology and method based on high-frequency power electronic transformer |
| CN112290619A (en) * | 2020-10-16 | 2021-01-29 | 中南大学 | Battery equalizer with automatic power limiting function |
| CN112311245A (en) * | 2020-11-06 | 2021-02-02 | 中国地质大学（武汉） | High-frequency intermittent control system and method of bidirectional series resonant converter |
| CN112350400A (en) * | 2020-10-30 | 2021-02-09 | 湖北工业大学 | Lithium battery pack non-hierarchical active and passive equalization circuit and method |
-
2021
- 2021-06-10 CN CN202110645083.XA patent/CN113098115B/en active Active
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050185429A1 (en) * | 2004-02-24 | 2005-08-25 | Patrizio Vinciarelli | Adaptively configured voltage transformation module array |
| CN101771351A (en) * | 2009-01-07 | 2010-07-07 | 力博特公司 | Three-phase tri-level LLC resonant converter |
| CN201957320U (en) * | 2011-04-03 | 2011-08-31 | 阮树成 | DC low-voltage power supply eight-bridge oscillation power synthesis high-voltage sodium lamp |
| CN102237799A (en) * | 2011-07-12 | 2011-11-09 | 珠海泰坦新能源系统有限公司 | Three-level resonant converter clamped by resonant capacitor and transformer primary side |
| CN102624243A (en) * | 2012-04-19 | 2012-08-01 | 中国矿业大学(北京) | Isolation-type half-bridge three-level dual-direction direct-current/direct-current (DC/DC) converter |
| JP2014176226A (en) * | 2013-03-11 | 2014-09-22 | Sumitomo Electric Ind Ltd | Dc/dc converter and distributed power supply system |
| CN104377778A (en) * | 2014-11-26 | 2015-02-25 | 山东大学 | Adjacent-Cell-to-Cell equalization circuit based on LCL resonant transformation and implementation method |
| CN104410133A (en) * | 2014-12-19 | 2015-03-11 | 山东大学 | Equalization circuit based on Buck-Boost convertor and bidirectional LC (inductance capacitance) resonant convertor as well as implementation method |
| CN106602880A (en) * | 2016-10-28 | 2017-04-26 | 深圳朗兴智能云充有限公司 | Large power high efficiency thermal equilibrium LLC resonant converter and control method thereof |
| US20180140859A1 (en) * | 2016-11-23 | 2018-05-24 | Marian MEIR | Device and method for generating electrical stimulation |
| CN107658948A (en) * | 2017-11-10 | 2018-02-02 | 国网江苏省电力公司泰州供电公司 | A kind of battery pack balancing charging circuit and its control structure |
| CN107825973A (en) * | 2017-12-22 | 2018-03-23 | 东南大学 | Novel electric vehicle charging circuit and its control method |
| CN108900097A (en) * | 2018-09-10 | 2018-11-27 | 西南交通大学 | A kind of controlled resonant converter |
| CN109617419A (en) * | 2019-01-07 | 2019-04-12 | 浙江大学 | A kind of three port DC-DC converter of isolated form |
| CN110429683A (en) * | 2019-08-19 | 2019-11-08 | 张振明 | The efficient charging method of battery and charging circuit |
| CN110380493A (en) * | 2019-08-29 | 2019-10-25 | 西南交通大学 | A kind of serial lithium battery equalizer circuit |
| CN110649812A (en) * | 2019-09-06 | 2020-01-03 | 广州金升阳科技有限公司 | Wide-gain-range LLC resonant converter and control method thereof |
| CN111697837A (en) * | 2020-05-18 | 2020-09-22 | 西安许继电力电子技术有限公司 | Direct-current transformer topology based on three-level CLLLC resonant converter and control method |
| CN111987759A (en) * | 2020-07-21 | 2020-11-24 | 河海大学 | Active equalization topology and method based on high-frequency power electronic transformer |
| CN112290619A (en) * | 2020-10-16 | 2021-01-29 | 中南大学 | Battery equalizer with automatic power limiting function |
| CN112350400A (en) * | 2020-10-30 | 2021-02-09 | 湖北工业大学 | Lithium battery pack non-hierarchical active and passive equalization circuit and method |
| CN112311245A (en) * | 2020-11-06 | 2021-02-02 | 中国地质大学（武汉） | High-frequency intermittent control system and method of bidirectional series resonant converter |
Non-Patent Citations (3)
| Title |
|---|
| CHUNJIAN CAI等: "A Battery Equalizing Circuit Based on Multiwinding Transformer", 《2020 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION》 * |
| YANG CHEN 等: "A MultiWinding Transformer Cell-to-Cell Active Equalization Method for Lithium-Ion Batteries With Reduced Number of Driving Circuits", 《 IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
| 郭潇潇等: "电力电子变压器中LLC谐振变换器的研究", 《电力电子技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113098115B (en) | 2021-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106787021A (en) | A kind of battery pack balancing device modular system and method based on multiwinding transformer | |
| CN104377778B (en) | Adjacent-Cell-to-Cell equalizing circuit based on LCL resonant transformation and implementation method | |
| CN112202218B (en) | Equalizing circuit based on bipolar T-shaped double-resonance switch capacitor converter and control method | |
| CN111555408B (en) | Single-inductor-based active equalization method for series-parallel battery pack | |
| CN111555407B (en) | Series-parallel battery pack integrated active equalization method based on inductive energy storage | |
| CN104868532A (en) | Cuk chopper circuit bidirectional arm-based series storage cell pack bidirectional energy equalizer and control method thereof | |
| CN115663973A (en) | Active equalization circuit and method for battery pack | |
| CN109617161B (en) | Quasi-resonance staggered switch capacitor battery equalization circuit and control method thereof | |
| CN113746174B (en) | Self-adaptive active equalization method for single-inductance single-capacitance series battery pack | |
| CN110649337A (en) | Novel lithium ion battery Cell-to-Cell modular equalization circuit based on single inductor and control method | |
| CN110758179B (en) | LC-L-based series battery pack equalization circuit and equalization method | |
| CN110707780B (en) | Staggered battery equalization circuit structure based on transformer | |
| CN107785957A (en) | Battery equalizing circuit and implementation method based on normal shock and inverse-excitation converting | |
| CN113098115B (en) | Resonant series battery voltage-sharing circuit based on multi-port transformer and implementation method | |
| CN110667437A (en) | Equalizing circuit based on switched capacitor and LC resonance unit and control method | |
| CN115498734A (en) | Lithium battery annular equalizer based on Buck-Boost converter and switched capacitor | |
| CN110867921B (en) | Direct equalization method for series battery pack based on converter | |
| CN210403957U (en) | Voltage equalization circuit with complete equalization branch | |
| CN210912093U (en) | Equalizing circuit based on switched capacitor and LC resonance unit | |
| CN112688391A (en) | Lithium ion battery equalization circuit based on symmetrical CLLC DC converter | |
| CN215042227U (en) | Series battery pack equalization circuit based on L-LC energy storage | |
| CN206517117U (en) | A kind of battery pack balancing device modular system based on multiwinding transformer | |
| CN112054688B (en) | Modular energy storage system equalizing circuit with bidirectional current capability | |
| CN207082860U (en) | A kind of double-deck active equalization circuit based on multi input conversion | |
| CN110649336A (en) | Voltage equalization circuit with complete equalization branch and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 610031 north section of two ring road, Sichuan, Chengdu Applicant after: SOUTHWEST JIAOTONG University Address before: 610031 No. two, section 111, ring road, Chengdu, Sichuan, China Applicant before: SOUTHWEST JIAOTONG University |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |