CN117955220B - Charging pile power supply module current equalizing method and charging pile - Google Patents
Charging pile power supply module current equalizing method and charging pile Download PDFInfo
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The application belongs to the technical field of charging piles, and provides a charging pile power supply module current sharing method and a charging pile for solving the problem of non-uniform output current of a traditional charging pile power supply module. The charging pile comprises a current equalizing circuit and N power supply modules, wherein in the process of executing a current equalizing method of the charging pile power supply modules, the current equalizing circuit obtains sampling voltages of output voltages of the power supply modules, and average is carried out on the sampling voltages to obtain average voltages; the power supply module obtains average voltage, and adjusts output voltage of the power supply module according to the average voltage and the sampling voltage, so that output current of the power supply module is in a current range taking the average current as a center and taking a preset value as a radius. Therefore, the output currents of the N power supply modules are all in the same current range, the current-sharing output of the N power supply modules is realized, and no-load or overload work of the power supply modules is avoided.
Description
Technical Field
The application relates to the technical field of charging piles, in particular to a charging pile power supply module current sharing method and a charging pile.
Background
With the continuous development of new energy automobiles and the continuous progress of charging technologies, charging piles have been developed to higher charging voltages and greater charging powers, for example, 120KW (kilowatts), and even greater power demands are increasing. However, because the power that single power module can provide is 20KW or 30KW generally, so high-power fills electric pile and adopts the strategy that parallel use power module expands, and a plurality of power modules carry out parallel output.
According to the implementation of the high-power charging pile, a plurality of power modules are used in parallel, and the problem of parallel output balance of the power modules is solved. However, since the voltage output from each power module to the load cannot be completely uniform, the output impedance characteristics are also differentiated. The power modules are simply connected in parallel, so that the output currents of the power modules cannot be guaranteed to be completely consistent, the existing power modules are likely to work under full load, and the existing power modules are likely to run under no load. The module is in idle running and full running, and is not in the optimal running state, so that the overall service life of the system is influenced.
Disclosure of Invention
Based on the above, it is necessary to provide a current equalizing method for a power module of a charging pile and a charging pile aiming at the problem of non-uniform output current of the power module of the conventional charging pile.
In order to achieve the above purpose, in one aspect, the present application provides a current equalizing method for a power module of a charging pile, where the current equalizing method for the power module of the charging pile is applied to the charging pile, and the charging pile includes a current equalizing circuit and N power modules; the power supply modules are respectively connected with the current equalizing circuit; the power supply module is used for acquiring electric energy from an alternating current power grid and supplying power to electric equipment;
The current equalizing circuit obtains sampling voltage of output voltage of the power supply module, and averages the sampling voltage to obtain average voltage;
The power supply module obtains average voltage, and adjusts output voltage of the power supply module according to the average voltage and the sampling voltage, so that output current of the power supply module is in a current range taking the average current as a center and taking a preset value as a radius; the average current is obtained by the power module according to the average voltage.
Further, the power module obtains an average voltage, and adjusts an output voltage of the power module according to the average voltage and the sampling voltage, so that an output current of the power module is in a current range with the average current as a center and a preset value as a radius, and the method comprises the following steps:
the power module compares the sampling voltage with the average voltage, and if the sampling voltage is equal to the average voltage, the power module maintains the output voltage;
The power module compares the sampled voltage with the average voltage, and adjusts the output voltage if the sampled voltage is not equal to the average voltage.
Further, the power module compares the sampled voltage with the average voltage, and adjusts the output voltage if the sampled voltage is not equal to the average voltage, comprising the steps of:
the power supply module obtains a voltage difference value between the sampling voltage and the average voltage, obtains an adjustment voltage according to the voltage difference value and the reference voltage, and adjusts the output voltage based on the adjustment voltage; the reference voltage is a voltage signal used as a standard reference for the voltage difference; the voltage signal is connected to the power module.
Further, the current sharing circuit comprises a current sharing bus and N current sharing resistors with equal resistance values; the current equalizing resistors are in one-to-one correspondence with the power supply modules;
the first end of the current sharing resistor is connected with the first end of the power module, and the second end of the current sharing resistor is connected with the current sharing bus; the power module transmits sampling voltage from the current sharing resistor to the current sharing bus through a first end of the power module; the current equalizing bus is used for averaging all the sampling voltages to obtain average voltage;
the second end of the power supply module is also connected with the second end of the current sharing resistor; the power module obtains average voltage through a second end of the power module;
The current sharing bus obtains average voltage based on the following formula:
Wherein, Sampling voltage corresponding to the power supply module; n is a positive integer; /(I)The resistance value of the current equalizing resistor is; /(I)Is the average voltage.
Further, the power supply module comprises a control circuit, a power circuit and a signal processing circuit;
The control circuit is respectively connected with the power circuit and the signal processing circuit; the input end of the power circuit is used for connecting an alternating current power grid, and the output end is used for connecting electric equipment;
the first end of the signal processing circuit is connected with the first end of the current sharing resistor, and the sampling voltage is transmitted to the current sharing resistor; the second end of the signal processing circuit is connected with the second end of the current sharing resistor to obtain average voltage; the sampling end of the signal processing circuit is connected to the output end of the power circuit to obtain sampling voltage;
the signal processing circuit sends a signal to the control circuit according to the result of processing the average voltage and the sampling voltage; the control circuit controls the power circuit to adjust the output voltage according to the signal so that the output current of the power circuit is in a current range taking the average current as the center and taking a preset value as a radius.
Further, the signal processing circuit includes an amplifying circuit, a first differential amplifying circuit, and a second differential amplifying circuit;
The sampling end of the amplifying circuit is connected to the output end of the power circuit, the output end of the amplifying circuit is connected to the first input end of the first differential amplifying circuit, and the output end of the amplifying circuit is used as the first end of the signal processing circuit to be connected to the first end of the current sharing resistor;
the second input end of the first differential amplifying circuit is used as the second end of the signal processing circuit to be connected with the second end of the current sharing resistor, and the output end of the first differential amplifying circuit is connected with the first input end of the second differential amplifying circuit; the second input end of the second differential amplifying circuit is connected with a reference voltage; the output end of the second differential amplifying circuit is connected with the control circuit;
The amplifying circuit acquires sampling voltage of output voltage, amplifies the sampling voltage and transmits the sampling voltage to the current sharing bus through the current sharing resistor, and transmits the sampling voltage to the first differential amplifying circuit through a first input end of the first differential amplifying circuit;
The first differential amplifying circuit obtains average voltage through a second input end of the first differential amplifying circuit, obtains a voltage difference value according to the sampling voltage and the average voltage, and transmits the voltage difference value to the second differential amplifying circuit;
the second differential amplifying circuit acquires an adjusting voltage according to the voltage difference value and the reference voltage, and transmits the adjusting voltage to the control circuit, and the control circuit controls the power circuit to adjust the output voltage according to the adjusting voltage.
Further, the amplifying circuit comprises a resistor R1, a resistor R2, a resistor R3 and a first amplifier;
The resistor R1 is connected in series with the output end of the power circuit, the first end of the resistor R1 is connected with the positive phase end of the first amplifier, and the second end of the resistor R1 is connected with the first end of the resistor R2; the second end of the resistor R2 is connected with the inverting end of the first amplifier; the first end of the resistor R3 is connected with the inverting end of the first amplifier, and the second end of the resistor R3 is connected with the output end of the first amplifier; the output end of the first amplifier is respectively connected with the first end of the current sharing resistor and the first input end of the first differential amplifying circuit.
Further, the first differential amplifying circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a second amplifier;
The first end of the resistor R4 is connected with the second end of the current equalizing resistor, and the second end of the resistor R4 is connected with the inverting end of the second amplifier; the first end of the resistor R5 is connected with the output end of the first amplifier, and the second end of the resistor R5 is respectively connected with the positive phase end of the second amplifier and the first end of the resistor R6; the second end of the resistor R6 is grounded; the first end of the resistor R7 is connected with the inverting end of the second amplifier, and the second end of the resistor R7 is connected with the output end of the second amplifier; the output end of the second amplifier is connected with the first input end of the second differential amplifying circuit.
Further, the second differential amplifying circuit includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, and a third amplifier;
The first end of the resistor R8 is connected with the output end of the second amplifier, and the second end of the resistor R8 is connected with the inverting end of the third amplifier; the first end of the resistor R9 is connected with the inverting end of the third amplifier, and the second end of the resistor R9 is connected with the output end of the third amplifier; the non-inverting terminal of the third amplifier is connected to the reference voltage through a resistor R10 and is grounded through a resistor R11.
On the other hand, the application also provides a charging pile which comprises a current equalizing circuit and N power supply modules; the power supply modules are respectively connected with the current equalizing circuit; the power supply input end of the power supply module is connected with an alternating current power grid, and the power supply output end is connected with electric equipment.
One of the above technical solutions has the following advantages and beneficial effects:
The application provides a current equalizing method of a charging pile power supply module, in particular to a current equalizing circuit which obtains sampling voltage of output voltage of the power supply module and averages the sampling voltage to obtain average voltage; the power supply module obtains average voltage, and adjusts output voltage of the power supply module according to the average voltage and the sampling voltage, so that output current of the power supply module is in a current range taking the average current as a center and taking a preset value as a radius. According to the application, the average voltage is obtained by the average voltage obtaining circuit for the sampling voltages of the output voltages of the N power supply modules, the average voltage is the basis for realizing the current sharing output by regulating the output currents of the N power supply modules, and after the average voltage is obtained by the power supply modules, the output voltages are regulated according to the average voltage and the sampling voltages, so that the output voltages are close to the average voltage, the output currents of the N power supply modules are ensured to be in the same current range, the current sharing output of the N power supply modules is realized, and the no-load or overload work of the power supply modules is avoided, and the service life of the charging pile is damaged.
Drawings
Fig. 1 is a schematic structural diagram of a charging pile according to an embodiment of the present application.
Fig. 2 is a flowchart of a current equalizing method of a charging pile power module according to the embodiment of the application.
Fig. 3 is a schematic structural diagram of a current equalizing circuit according to the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a power module according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a signal processing circuit according to an embodiment of the present application.
Fig. 6 is a circuit diagram of a signal processing circuit according to an embodiment of the present application.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
For a plurality of power modules used in parallel, at present, a general output balancing scheme mainly comprises a master-slave machine setting method and a maximum current method. Wherein, the master-slave machine setting method comprises the following steps: one power module of a plurality of parallel power modules is set as a master module, the other power modules are slave modules, and the slave modules adjust the current of the slave modules by taking the current of the master module as a reference to realize the purpose of current sharing. Maximum current method: the method comprises the steps of selecting the module with the largest output current among a plurality of parallel power supply modules as a main module, and adjusting the output current of the rest power supply modules to approach the main module so as to realize the purpose of current sharing.
In order to achieve balanced output of the plurality of parallel power modules 13, in one embodiment, as shown in fig. 1, a current equalizing method of a power module of a charging pile is provided, and the current equalizing method of the power module of the charging pile is applied to the charging pile. The charging post is a device for supplying power to the charging apparatus. Powered device 17 includes, but is not limited to: electric cars, electric buses, electric ships, etc. The charging pile comprises a current equalizing circuit 11 and N power supply modules 13. The current equalizing circuit 11 is configured to perform an averaging process on the obtained voltage to obtain an average voltage. The power supply modules 13 are respectively connected with the current equalizing circuit 11. The power module 13 is configured to obtain electric energy from the ac power grid 15 and supply power to the electric device 17, and specifically, the power module 13 converts the ac power obtained from the ac power grid 15 into dc power to charge the electric device 17.
As shown in fig. 2, the current equalizing method of the charging pile power supply module comprises the following steps:
In step S210, the current equalizing circuit 11 obtains the sampled voltage of the output voltage of the power module 13, and averages the sampled voltage to obtain an average voltage. In one example, the current equalizing circuit 11 may include a processor and a sampling circuit, the processor obtains sampling voltages of output voltages of the N power modules through the sampling circuit, the processor averages the sampling voltages to obtain an average voltage, and transmits the average voltage to the power modules. The sampling voltage is a divided voltage of the output voltage acquired by the sampling device (e.g., resistor).
In one example, the current equalizing circuit 11 may include a processor, the power module includes a sampling circuit, the sampling circuit transmits a sampled voltage of the collected output voltage of the power module to the processor, and the processor averages the sampled voltage to obtain an average voltage and transmits the average voltage to the power module. In one example, as shown in fig. 3, the current sharing circuit 11 includes N current sharing resistors 111 and current sharing bus 113 with equal resistance values; the current equalizing resistors 111 are in one-to-one correspondence with the power supply modules 13; the first end of the current sharing resistor 111 is connected with the first end of the power module 13, and the second end of the current sharing resistor is connected with the current sharing bus 113; the power module 13 transmits the sampling voltage from the current sharing resistor 111 to the current sharing bus 113 through the first end of the power module 13; the current equalizing bus 113 is used for averaging each sampling voltage to obtain an average voltage; the second end of the power module 13 is also connected with the second end of the current sharing resistor 111; the power module 13 obtains an average voltage through a second terminal of the power module 13. In this example, the power module includes a sampling circuit that samples the voltage, and the sampling circuit transmits the sampled voltage to the current sharing bus 113 through the current sharing resistor 111. It should be noted that, knowing the resistance value and the average voltage of the current sharing resistor 111, the average current of the N power modules can be obtained.
According to kirchhoff's current theorem, it can be known that the algebraic sum of currents flowing into the buses by each branch is zero, and according to the principle, the average voltage of the current-sharing buses is obtained based on the following formula: :
The above formula is transformed into:
Wherein, Sampling voltage corresponding to the power module 13; n is a positive integer; /(I)The resistance value of the current equalizing resistor 111; Is the average voltage.
In step S220, the power module 13 obtains an average voltage, and adjusts the output voltage of the power module 13 according to the average voltage and the sampling voltage, so that the output current of the power module 13 is within a current range centered on the average current and having a radius of a preset value. The average current is obtained by the power module 13 according to the average voltage, and the average current is equal to the average voltage divided by the resistance value of the current sharing resistor 111. For example, during the regulation, the power module 13 takes the average voltage as a standard, when the sampled voltage is greater than the average voltage, the power module 13 decreases the output voltage, and when the sampled voltage is less than the average voltage, the power module 13 increases the output voltage. The preset value can be set according to actual needs, and the smaller the preset value is, the higher the control current sharing precision is.
In one example, the power module 13 obtains an average voltage, and adjusts an output voltage of the power module 13 according to the average voltage and the sampling voltage, so that an output current of the power module 13 is within a current range centered on the average current and having a radius of a preset value, including the steps of: the power module 13 compares the sampled voltage with the average voltage, and maintains the output voltage if the sampled voltage is equal to the average voltage; the power module 13 compares the sampled voltage with the average voltage, and adjusts the output voltage if the sampled voltage is not equal to the average voltage. When the sampled voltage is equal to the average voltage, it is indicated that the output of the power module 13 is normal. When the sampled voltage is not equal to the average voltage, it indicates that the output of the power module 13 is abnormal, specifically, the sampled voltage is greater than the average voltage, which indicates that the power module 13 may operate under overload, and when the sampled voltage is less than the average voltage, which indicates that the power module 13 may operate under no load.
In one example, the power module 13 compares the sampled voltage with the average voltage, and adjusts the output voltage if the sampled voltage is not equal to the average voltage, comprising the steps of: the power module 13 obtains a voltage difference between the sampling voltage and the average voltage, obtains an adjustment voltage according to the voltage difference and the reference voltage, and adjusts the output voltage based on the adjustment voltage. The reference voltage is a voltage signal used as a standard reference for the voltage difference; the voltage signal is connected to the power module. The reference voltage is a voltage signal which is always determined and cannot be changed, is used for improving the precision and the stability of the sampling circuit, and can be understood as the reference voltage set for the voltage difference value, so that the reference voltage can modify the voltage difference value, and more accurate adjustment voltage is obtained. It will be appreciated that the adjustment voltage is essentially a voltage difference, but in this embodiment the adjustment voltage is obtained after the voltage difference has been corrected by the reference voltage. For example, the sampled voltage is differentially amplified from the average voltage to obtain a voltage difference. And carrying out differential amplification on the voltage difference value and the reference voltage to obtain an adjustment voltage. It will be appreciated that when the sampled voltage is equal to the average voltage, the voltage difference is zero and the regulated voltage is zero.
To achieve the above steps, in one example, as shown in fig. 4, the power module 13 includes a control circuit 131, a power circuit 133, and a signal processing circuit 135; the control circuit 131 is connected to the power circuit 133 and the signal processing circuit 135, respectively; the input end of the power circuit 133 is used for connecting with the alternating current power grid 15, and the output end is used for connecting with the electric equipment 17; a first end of the signal processing circuit 135 is connected with a first end of the current sharing resistor 111, and transmits sampling voltage to the current sharing resistor 111; a second end of the signal processing circuit 135 is connected with a second end of the current sharing resistor 111 to obtain average voltage; the sampling end of the signal processing circuit 135 is connected to the output end of the power circuit 133 to obtain a sampling voltage; the signal processing circuit 135 transmits a signal to the control circuit 131 according to the result of processing the average voltage and the sampling voltage; the control circuit 131 controls the power circuit 133 to adjust the output voltage according to the signal so that the output current of the power circuit 133 is within a current range with an average current as a center and a preset value as a radius. It should be noted that, the signal processing circuit 135 refers to: whether the average voltage is equal to the sampling voltage or the average voltage is not equal to the sampling voltage. The sending of a signal to the control circuit 131 is to send an adjustment voltage to the control circuit 131.
The implementation of the signal processing circuit 135 is various, and in one example, as shown in fig. 5, the signal processing circuit 135 includes an amplifying circuit 51, a first differential amplifying circuit 53, and a second differential amplifying circuit 55;
the sampling end of the amplifying circuit 51 is connected to the output end of the power circuit 133, the output end is connected to the first input end of the first differential amplifying circuit 53, and the output end of the amplifying circuit 51 is connected to the first end of the current equalizing resistor 111 as the first end of the signal processing circuit 135;
A second input end of the first differential amplification circuit 53 is connected to a second end of the current sharing resistor 111 as a second end of the signal processing circuit 135, and an output end of the first differential amplification circuit 53 is connected to a first input end of the second differential amplification circuit 55; a second input end of the second differential amplifying circuit 55 is connected with a reference voltage; the output end of the second differential amplification circuit 55 is connected with the control circuit 131;
The amplifying circuit 51 collects the sampling voltage of the output voltage, amplifies the sampling voltage and transmits the sampling voltage to the current sharing bus 113 through the current sharing resistor 111, and transmits the sampling voltage to the first differential amplifying circuit 53 through the first input end of the first differential amplifying circuit 53;
the first differential amplifying circuit 53 obtains an average voltage through a second input end of the first differential amplifying circuit 53, obtains a voltage difference value according to the sampled voltage and the average voltage, and transmits the voltage difference value to the second differential amplifying circuit 55;
The second differential amplifying circuit 55 obtains an adjustment voltage according to the voltage difference and the reference voltage, and transmits the adjustment voltage to the control circuit 131, and the control circuit 131 controls the power circuit 133 to adjust the output voltage according to the adjustment voltage.
The implementation of the amplifying circuit 51 is various, and in one example, as shown in fig. 6, the amplifying circuit 51 includes a resistor R1, a resistor R2, a resistor R3, and a first amplifier U1;
The resistor R1 is connected in series with the output end of the power circuit 133, the first end of the resistor R1 is connected with the positive end of the first amplifier U1, and the second end of the resistor R1 is connected with the first end of the resistor R2; the second end of the resistor R2 is connected with the inverting end of the first amplifier U1; the first end of the resistor R3 is connected with the inverting end of the first amplifier U1, and the second end of the resistor R3 is connected with the output end of the first amplifier U1; the output terminal of the first amplifier U1 is connected to the first terminal of the current sharing resistor 111 and the first input terminal of the first differential amplifying circuit 53, respectively.
The transfer function of the sampled voltage is as follows:
Wherein, Representing the sampled voltage; /(I)Representing the voltage across resistor R1.
The first differential amplifying circuit 53 is variously implemented, and in one example, as shown in fig. 6, the first differential amplifying circuit 53 includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a second amplifier U2;
The first end of the resistor R4 is connected with the second end of the current equalizing resistor 111, and the second end of the resistor R4 is connected with the inverting end of the second amplifier U2; the first end of the resistor R5 is connected with the output end of the first amplifier U1, and the second end of the resistor R5 is respectively connected with the non-inverting end of the second amplifier U2 and the first end of the resistor R6; the second end of the resistor R6 is grounded; the first end of the resistor R7 is connected with the inverting end of the second amplifier U2, and the second end of the resistor R7 is connected with the output end of the second amplifier U2; the output of the second amplifier U2 is connected to a first input of a second differential amplifying circuit 55.
The transfer function of the voltage difference is as follows:
Wherein, Representing the voltage difference; /(I)Representing the sampled voltage; /(I)Representing the average voltage.
The second differential amplifying circuit 55 is variously implemented, and in one example, as shown in fig. 6, the second differential amplifying circuit 55 includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, and a third amplifier U3;
the first end of the resistor R8 is connected with the output end of the second amplifier U2, and the second end of the resistor R8 is connected with the inverting end of the third amplifier U3; the first end of the resistor R9 is connected with the inverting end of the third amplifier U3, and the second end of the resistor R9 is connected with the output end of the third amplifier U3; the non-inverting terminal of the third amplifier U3 is connected to the reference voltage through a resistor R10 and is grounded through a resistor R11.
The transfer function of the regulated voltage is as follows:
Wherein, Representing an adjustment voltage; /(I)Representing the voltage difference; /(I)Representing the reference voltage.
According to the charging pile power supply module current equalizing method provided by the embodiments of the application, specifically, the current equalizing circuit 11 obtains the sampling voltage of the output voltage of the power supply module 13, and averages the sampling voltage to obtain the average voltage; the power module 13 obtains an average voltage, and adjusts the output voltage of the power module 13 according to the average voltage and the sampling voltage, so that the output current of the power module 13 is in a current range with the average current as a center and a preset value as a radius. According to the application, the average voltage is obtained by the average voltage obtaining circuit 11 on the sampling voltage of the output voltages of the N power modules 13, the average voltage is the basis for realizing the current sharing output by regulating the output currents of the N power modules 13, and after the average voltage is obtained by the power modules 13, the output voltage is regulated according to the average voltage and the sampling voltage, so that the output voltages are close to the average voltage, the output currents of the N power modules 13 are ensured to be in the same current range, the current sharing output of the N power modules 13 is realized, no-load or overload work of the power modules 13 is avoided, and the service life of the charging pile is damaged. The application can realize accurate control of current, and peripheral circuits are simple and easy to realize.
In one embodiment, there is also provided a charging pile including a current equalizing circuit 11 and N power supply modules 13; the power supply modules 13 are respectively connected with the current equalizing circuit 11; the power supply input end of the power supply module 13 is connected with an alternating current power grid 15, and the power supply output end is connected with electric equipment 17.
In one example, as shown in fig. 3, the current sharing circuit 11 includes a current sharing bus 113 and; the current equalizing resistors 111 of the N current equalizing resistors 111 with equal resistance values are in one-to-one correspondence with the power supply modules 13; the first end of the current sharing resistor 111 is connected with the first end of the power module 13, and the second end of the current sharing resistor is connected with the current sharing bus 113; the power module 13 transmits the sampling voltage from the current sharing resistor 111 to the current sharing bus 113 through the first end of the power module 13; the current equalizing bus 113 is used for averaging each sampling voltage to obtain an average voltage; the second end of the power module 13 is also connected with the second end of the current sharing resistor 111; the power module 13 obtains an average voltage through a second terminal of the power module 13. In this example, the power module includes a sampling circuit that samples the voltage, and the sampling circuit transmits the sampled voltage to the current sharing bus 113 through the current sharing resistor 111. It should be noted that, knowing the resistance value and the average voltage of the current sharing resistor 111, the average current of the N power modules can be obtained.
In one example, as shown in fig. 4, the power module 13 includes a control circuit 131, a power circuit 133, and a signal processing circuit 135; the control circuit 131 is connected to the power circuit 133 and the signal processing circuit 135, respectively; the input end of the power circuit 133 is used for connecting with the alternating current power grid 15, and the output end is used for connecting with the electric equipment 17; a first end of the signal processing circuit 135 is connected with a first end of the current sharing resistor 111, and transmits sampling voltage to the current sharing resistor 111; a second end of the signal processing circuit 135 is connected with a second end of the current sharing resistor 111 to obtain average voltage; the sampling end of the signal processing circuit 135 is connected to the output end of the power circuit 133 to obtain an output voltage; the signal processing circuit 135 transmits a signal to the control circuit 131 according to the result of processing the average voltage and the sampling voltage; the control circuit 131 controls the power circuit 133 to adjust the output voltage according to the signal so that the output current of the power circuit 133 is within a current range with an average current as a center and a preset value as a radius. It should be noted that, the signal processing circuit 135 refers to: whether the average voltage is equal to the sampling voltage or the average voltage is not equal to the sampling voltage. The sending of a signal to the control circuit 131 is to send an adjustment voltage to the control circuit 131.
The implementation of the signal processing circuit 135 is various, and in one example, as shown in fig. 5, the signal processing circuit 135 includes an amplifying circuit 51, a first differential amplifying circuit 53, and a second differential amplifying circuit 55;
the sampling end of the amplifying circuit 51 is connected to the output end of the power circuit 133, the output end is connected to the first input end of the first differential amplifying circuit 53, and the output end of the amplifying circuit 51 is connected to the first end of the current equalizing resistor 111 as the first end of the signal processing circuit 135;
A second input end of the first differential amplification circuit 53 is connected to a second end of the current sharing resistor 111 as a second end of the signal processing circuit 135, and an output end of the first differential amplification circuit 53 is connected to a first input end of the second differential amplification circuit 55; a second input end of the second differential amplifying circuit 55 is connected with a reference voltage; the output end of the second differential amplification circuit 55 is connected with the control circuit 131;
The amplifying circuit 51 collects the sampling voltage of the output voltage, amplifies the sampling voltage and transmits the sampling voltage to the current sharing bus 113 through the current sharing resistor 111, and transmits the sampling voltage to the first differential amplifying circuit 53 through the first input end of the first differential amplifying circuit 53;
the first differential amplifying circuit 53 obtains an average voltage through a second input end of the first differential amplifying circuit 53, obtains a voltage difference value according to the sampled voltage and the average voltage, and transmits the voltage difference value to the second differential amplifying circuit 55;
The second differential amplifying circuit 55 obtains an adjustment voltage according to the voltage difference and the reference voltage, and transmits the adjustment voltage to the control circuit 131, and the control circuit 131 controls the power circuit 133 to adjust the output voltage according to the adjustment voltage.
The implementation of the amplifying circuit 51 is various, and in one example, as shown in fig. 6, the amplifying circuit 51 includes a resistor R1, a resistor R2, a resistor R3, and a first amplifier U1;
The resistor R1 is connected in series with the output end of the power circuit 133, the first end of the resistor R1 is connected with the positive end of the first amplifier U1, and the second end of the resistor R1 is connected with the first end of the resistor R2; the second end of the resistor R2 is connected with the inverting end of the first amplifier U1; the first end of the resistor R3 is connected with the inverting end of the first amplifier U1, and the second end of the resistor R3 is connected with the output end of the first amplifier U1; the output terminal of the first amplifier U1 is connected to the first terminal of the current sharing resistor 111 and the first input terminal of the first differential amplifying circuit 53, respectively.
The first differential amplifying circuit 53 is variously implemented, and in one example, as shown in fig. 6, the first differential amplifying circuit 53 includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a second amplifier U2;
The first end of the resistor R4 is connected with the second end of the current equalizing resistor 111, and the second end of the resistor R4 is connected with the inverting end of the second amplifier U2; the first end of the resistor R5 is connected with the output end of the first amplifier U1, and the second end of the resistor R5 is respectively connected with the non-inverting end of the second amplifier U2 and the first end of the resistor R6; the second end of the resistor R6 is grounded; the first end of the resistor R7 is connected with the inverting end of the second amplifier U2, and the second end of the resistor R7 is connected with the output end of the second amplifier U2; the output of the second amplifier U2 is connected to a first input of a second differential amplifying circuit 55.
The second differential amplifying circuit 55 is variously implemented, and in one example, as shown in fig. 6, the second differential amplifying circuit 55 includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, and a third amplifier U3;
the first end of the resistor R8 is connected with the output end of the second amplifier U2, and the second end of the resistor R8 is connected with the inverting end of the third amplifier U3; the first end of the resistor R9 is connected with the inverting end of the third amplifier U3, and the second end of the resistor R9 is connected with the output end of the third amplifier U3; the non-inverting terminal of the third amplifier U3 is connected to the reference voltage through a resistor R10 and is grounded through a resistor R11.
In a specific example, the signal processing circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a first amplifier U1, a second amplifier U2, and a third amplifier U3;
The resistor R1 is connected in series with the output end of the power circuit 133, the first end of the resistor R1 is connected with the positive end of the first amplifier U1, and the second end of the resistor R1 is connected with the first end of the resistor R2; the second end of the resistor R2 is connected with the inverting end of the first amplifier U1; the first end of the resistor R3 is connected with the inverting end of the first amplifier U1, and the second end of the resistor R3 is connected with the output end of the first amplifier U1; the output end of the first amplifier U1 is respectively connected with the first end of the current equalizing resistor 111 and the non-inverting end of the second amplifier U2;
The first end of the resistor R4 is connected with the second end of the current equalizing resistor 111, and the second end of the resistor R4 is connected with the inverting end of the second amplifier U2; the first end of the resistor R5 is connected with the output end of the first amplifier U1, and the second end of the resistor R5 is respectively connected with the non-inverting end of the second amplifier U2 and the first end of the resistor R6; the second end of the resistor R6 is grounded; the first end of the resistor R7 is connected with the inverting end of the second amplifier U2, and the second end of the resistor R7 is connected with the output end of the second amplifier U2; the output end of the second amplifier U2 is connected with the inverting end of the third amplifier U3.
The first end of the resistor R8 is connected with the output end of the second amplifier U2, and the second end of the resistor R8 is connected with the inverting end of the third amplifier U3; the first end of the resistor R9 is connected with the inverting end of the third amplifier U3, and the second end of the resistor R9 is connected with the output end of the third amplifier U3; the non-inverting terminal of the third amplifier U3 is connected to the reference voltage through a resistor R10 and is grounded through a resistor R11.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (5)
1. The charging pile power supply module current sharing method is applied to a charging pile and is characterized by comprising a current sharing circuit and N power supply modules; the power supply module is respectively connected with the current equalizing circuit; the power supply module is used for acquiring electric energy from an alternating current power grid and supplying power to electric equipment;
the method comprises the following steps:
The current equalizing circuit obtains sampling voltage of the output voltage of the power supply module, and averages the sampling voltage to obtain average voltage;
The power supply module acquires the average voltage, and adjusts the output voltage of the power supply module according to the average voltage and the sampling voltage so that the output current of the power supply module is in a current range taking the average current as a center and taking a preset value as a radius; the average current is obtained by the power supply module according to the average voltage;
The power supply module obtains the average voltage, and adjusts the output voltage of the power supply module according to the average voltage and the sampling voltage, so that the output current of the power supply module is in a current range with the average current as a center and a preset value as a radius, and the method comprises the following steps:
The power module compares the sampled voltage with the average voltage, and maintains the output voltage if the sampled voltage is equal to the average voltage;
the power module compares the sampling voltage with the average voltage, and if the sampling voltage is not equal to the average voltage, the power module adjusts the output voltage;
The power module compares the sampled voltage with the average voltage, and adjusts the output voltage if the sampled voltage is not equal to the average voltage, including the steps of:
The power supply module obtains a voltage difference value between the sampling voltage and the average voltage, obtains an adjusting voltage according to the voltage difference value and a reference voltage, and adjusts the output voltage based on the adjusting voltage; the reference voltage is a voltage signal used as a standard reference for the voltage difference; the voltage signal is connected to the power supply module;
the current sharing circuit comprises a current sharing bus and N current sharing resistors with equal resistance values; the current equalizing resistors are in one-to-one correspondence with the power supply modules;
The first end of the current equalizing resistor is connected with the first end of the power supply module, and the second end of the current equalizing resistor is connected with the current equalizing bus; the power supply module transmits the sampling voltage from the current sharing resistor to the current sharing bus through a first end of the power supply module; the current equalizing bus is used for averaging each sampling voltage to obtain the average voltage;
the second end of the power supply module is also connected with the second end of the current equalizing resistor; the power supply module obtains the average voltage through a second end of the power supply module;
The average voltage is obtained by the current sharing bus based on the following formula:
Wherein, Sampling voltage corresponding to the power supply module; n is a positive integer; /(I)The resistance value of the current equalizing resistor is; is the average voltage;
The power module comprises a control circuit, a power circuit and a signal processing circuit;
The control circuit is respectively connected with the power circuit and the signal processing circuit; the input end of the power circuit is used for connecting with the alternating current power grid, and the output end is used for connecting with the electric equipment;
The first end of the signal processing circuit is connected with the first end of the current sharing resistor, and the sampling voltage is transmitted to the current sharing resistor; the second end of the signal processing circuit is connected with the second end of the current equalizing resistor to obtain the average voltage; the sampling end of the signal processing circuit is connected to the output end of the power circuit to acquire the sampling voltage;
The signal processing circuit sends a signal to the control circuit according to the result of processing the average voltage and the sampling voltage; the control circuit controls the power circuit to adjust the output voltage according to the signal so that the output current of the power circuit is in a current range taking the average current as a center and the preset value as a radius;
the signal processing circuit comprises an amplifying circuit, a first differential amplifying circuit and a second differential amplifying circuit;
The sampling end of the amplifying circuit is connected to the output end of the power circuit, the output end of the amplifying circuit is connected to the first input end of the first differential amplifying circuit, and the output end of the amplifying circuit is used as the first end of the signal processing circuit to be connected to the first end of the current equalizing resistor;
the second input end of the first differential amplifying circuit is used as the second end of the signal processing circuit to be connected with the second end of the current equalizing resistor, and the output end of the first differential amplifying circuit is connected with the first input end of the second differential amplifying circuit; the second input end of the second differential amplifying circuit is connected with a reference voltage; the output end of the second differential amplifying circuit is connected with the control circuit;
The amplifying circuit acquires sampling voltage of the output voltage, amplifies the sampling voltage and transmits the sampling voltage to the current equalizing bus through the current equalizing resistor, and transmits the sampling voltage to the first differential amplifying circuit through a first input end of the first differential amplifying circuit;
The first differential amplifying circuit obtains the average voltage through a second input end of the first differential amplifying circuit, obtains a voltage difference value according to the sampling voltage and the average voltage, and transmits the voltage difference value to the second differential amplifying circuit;
The second differential amplifying circuit acquires an adjusting voltage according to the voltage difference value and the reference voltage, and transmits the adjusting voltage to the control circuit, and the control circuit controls the power circuit to adjust the output voltage according to the adjusting voltage.
2. The current equalizing method of a charging pile power module according to claim 1, wherein the amplifying circuit comprises a resistor R1, a resistor R2, a resistor R3 and a first amplifier;
The resistor R1 is connected in series with the output end of the power circuit, the first end of the resistor R1 is connected with the positive end of the first amplifier, and the second end of the resistor R1 is connected with the first end of the resistor R2; the second end of the resistor R2 is connected with the inverting end of the first amplifier; the first end of the resistor R3 is connected with the inverting end of the first amplifier, and the second end of the resistor R3 is connected with the output end of the first amplifier; the output end of the first amplifier is respectively connected with the first end of the current equalizing resistor and the first input end of the first differential amplifying circuit.
3. The current sharing method of the charging pile power module according to claim 2, wherein the first differential amplifying circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a second amplifier;
The first end of the resistor R4 is connected with the second end of the current equalizing resistor, and the second end of the resistor R4 is connected with the inverting end of the second amplifier; the first end of the resistor R5 is connected with the output end of the first amplifier, and the second end of the resistor R5 is respectively connected with the positive end of the second amplifier and the first end of the resistor R6; the second end of the resistor R6 is grounded; the first end of the resistor R7 is connected with the inverting end of the second amplifier, and the second end of the resistor R7 is connected with the output end of the second amplifier; the output end of the second amplifier is connected with the first input end of the second differential amplifying circuit.
4. The current equalizing method for a charging pile power module according to claim 3, wherein the second differential amplifying circuit comprises a resistor R8, a resistor R9, a resistor R10, a resistor R11 and a third amplifier;
The first end of the resistor R8 is connected with the output end of the second amplifier, and the second end of the resistor R8 is connected with the inverting end of the third amplifier; the first end of the resistor R9 is connected with the inverting end of the third amplifier, and the second end of the resistor R9 is connected with the output end of the third amplifier; the non-inverting terminal of the third amplifier is connected to the reference voltage through the resistor R10 and grounded through the resistor R11.
5. The charging pile is characterized by comprising a current equalizing circuit and N power supply modules; the power supply module is respectively connected with the current equalizing circuit; the power supply input end of the power supply module is connected with an alternating current power grid, and the power supply output end of the power supply module is connected with electric equipment; the charging pile is used for realizing the current sharing method of the charging pile power supply module according to any one of claims 1 to 4.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475202A (en) * | 2013-08-27 | 2013-12-25 | 中国航天科技集团公司第九研究院第七七一研究所 | Power supply module output power expansion circuit with overcurrent protection |
| WO2016192299A1 (en) * | 2015-06-01 | 2016-12-08 | 中兴通讯股份有限公司 | Method and circuit for equalizing current by controlling input current |
| CN110994743A (en) * | 2019-12-27 | 2020-04-10 | 北京兴达智联科技有限公司 | Controlled battery pack device and charge-discharge control method thereof |
| WO2021056517A1 (en) * | 2019-09-29 | 2021-04-01 | 天津铁路信号有限责任公司 | Current sharing device and method for power system, and power modules |
| CN213602553U (en) * | 2020-08-30 | 2021-07-02 | 武汉永力科技股份有限公司 | Control circuit of parallel current-sharing power module |
| CN114678858A (en) * | 2022-05-26 | 2022-06-28 | 安徽金屹能源发展有限公司 | Multi-group power supply parallel current-sharing circuit |
| CN117240092A (en) * | 2023-09-15 | 2023-12-15 | 成都竟诚电子科技有限公司 | Parallel current sharing control method for multiple power supply modules |
| CN117277470A (en) * | 2023-08-24 | 2023-12-22 | 华为数字能源技术有限公司 | Charging device and charging pile |
| CN117507914A (en) * | 2024-01-05 | 2024-02-06 | 深圳市丁旺科技有限公司 | Charging pile charging module and current equalizing method |
| CN117681719A (en) * | 2024-02-01 | 2024-03-12 | 深圳市丁旺科技有限公司 | Charging module and charging pile |
| CN117748695A (en) * | 2024-02-18 | 2024-03-22 | 深圳市丁旺科技有限公司 | Charging pile charging module current equalizing method and charging pile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787725B (en) * | 2016-12-30 | 2019-06-18 | 成都芯源***有限公司 | Multiphase parallel power supply system, single-chip switch integrated circuit and current sharing method |
-
2024
- 2024-03-25 CN CN202410345483.2A patent/CN117955220B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475202A (en) * | 2013-08-27 | 2013-12-25 | 中国航天科技集团公司第九研究院第七七一研究所 | Power supply module output power expansion circuit with overcurrent protection |
| WO2016192299A1 (en) * | 2015-06-01 | 2016-12-08 | 中兴通讯股份有限公司 | Method and circuit for equalizing current by controlling input current |
| WO2021056517A1 (en) * | 2019-09-29 | 2021-04-01 | 天津铁路信号有限责任公司 | Current sharing device and method for power system, and power modules |
| CN110994743A (en) * | 2019-12-27 | 2020-04-10 | 北京兴达智联科技有限公司 | Controlled battery pack device and charge-discharge control method thereof |
| CN213602553U (en) * | 2020-08-30 | 2021-07-02 | 武汉永力科技股份有限公司 | Control circuit of parallel current-sharing power module |
| CN114678858A (en) * | 2022-05-26 | 2022-06-28 | 安徽金屹能源发展有限公司 | Multi-group power supply parallel current-sharing circuit |
| CN117277470A (en) * | 2023-08-24 | 2023-12-22 | 华为数字能源技术有限公司 | Charging device and charging pile |
| CN117240092A (en) * | 2023-09-15 | 2023-12-15 | 成都竟诚电子科技有限公司 | Parallel current sharing control method for multiple power supply modules |
| CN117507914A (en) * | 2024-01-05 | 2024-02-06 | 深圳市丁旺科技有限公司 | Charging pile charging module and current equalizing method |
| CN117681719A (en) * | 2024-02-01 | 2024-03-12 | 深圳市丁旺科技有限公司 | Charging module and charging pile |
| CN117748695A (en) * | 2024-02-18 | 2024-03-22 | 深圳市丁旺科技有限公司 | Charging pile charging module current equalizing method and charging pile |
Non-Patent Citations (2)
| Title |
|---|
| 一种具有均流功能的DC/DC变换器设计;王英武, 孙泰仁, 王俊峰, 宗小斌;电力电子技术;20041225(第06期);72-74 * |
| 一种新型开关电源并联均流技术的研究;杨旭丽;杨英;;电气应用;20060519(第05期);26-29 * |
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