CN110957784A - Voltage-stabilizing charging control method and device - Google Patents
Voltage-stabilizing charging control method and device Download PDFInfo
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- CN110957784A CN110957784A CN201911257268.2A CN201911257268A CN110957784A CN 110957784 A CN110957784 A CN 110957784A CN 201911257268 A CN201911257268 A CN 201911257268A CN 110957784 A CN110957784 A CN 110957784A
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Abstract
The invention discloses a method and a device for controlling voltage stabilization charging, wherein the method comprises the following steps: when the voltage requirement of a charging object is not higher than a preset voltage value, setting a charging module to charge the charging object in a low-voltage mode; receiving the voltage requirement sent by the charging object again; if the current voltage requirement is higher than a preset voltage value, loading a new charging module to charge the charging object in a high-voltage mode; the output current of the newly loaded charging module is set to gradually rise from zero, and meanwhile, the output current of the charging module which is set to be charged in a low-voltage mode is gradually reduced until the charging module is closed. The invention can charge the charging object stably, avoids the phenomenon of repeated jump of current and voltage caused by the mode switching of the charging module due to the rise of voltage, and can smoothly complete the charging.
Description
Technical Field
The present invention relates to the field of charging control technologies, and in particular, to a method and an apparatus for controlling voltage-stabilized charging.
Background
The charging module in the charging pile power cabinet at the present stage is in a high-low voltage mode during charging, can use the low-voltage mode and also can use the high-voltage mode when the charging demand voltage is less than or equal to 500V, and must use the high-voltage mode when the charging demand voltage is higher than 500V. Therefore, when the charging pile charges a charging object, the charging pile can be charged by using the high-voltage mode all the time. However, when the voltage requirement is less than or equal to 500V, the output power of the charging module during the high-voltage mode is much smaller than the output power during the low-voltage mode. Therefore, the preferred charging method is: when the voltage requirement of the charging object is less than or equal to 500V, charging by using a low-voltage mode; when the voltage demand of the charging object is higher than 500V, the charging is performed using the high voltage mode.
However, when the low-voltage mode is switched to the high-voltage mode, the charging module needs to be turned off, the charging module can be set to the high-voltage mode after the module is waited to discharge voltage and current (voltage and current are all reduced to 0), and the charging module can be started after the charging module is set to the high-voltage mode. Charging pile is in the process of charging the charging object, when the voltage demand exceeds 500V and the voltage drop of the charging module is set to be 0, the charging control system of the charging object enables the required charging voltage to be less than 500V, and therefore the charging module can be repeatedly switched under a high-voltage mode and a low-voltage mode, and charging failure is caused. Therefore, a charging method capable of keeping the voltage constant without causing the repeated high-low voltage mode jump of the charging module is needed.
Disclosure of Invention
In order to solve the problem that the charging fails due to the fact that an existing charging module is prone to repeatedly jumping in a high-voltage mode and a low-voltage mode in the charging process, the embodiment of the invention provides a voltage-stabilizing charging control method and device. The technical scheme is as follows:
in a first aspect, a method for controlling regulated charging is provided, where the method includes:
when the voltage requirement of a charging object is not higher than a preset voltage value, setting a charging module to charge the charging object in a low-voltage mode;
receiving the voltage requirement sent by the charging object again;
if the current voltage requirement is higher than a preset voltage value, loading a new charging module to charge the charging object in a high-voltage mode;
the output current of the newly loaded charging module is set to gradually rise from zero, and meanwhile, the output current of the charging module which is set to be charged in a low-voltage mode is gradually reduced until the charging module is closed.
Further, the method further comprises:
when receiving a voltage demand sent by the charging object, simultaneously receiving a current demand sent by the charging object;
correspondingly, the step of setting the output current of the newly loaded charging module to gradually rise from zero, and simultaneously setting the charging module which performs charging in the low-voltage mode to gradually reduce the output current until the charging module is turned off comprises the following steps:
and keeping the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged equal to the current demand.
Further, the step of setting the output current of the newly loaded charging module to gradually increase from zero, and setting the charging module that performs charging in the low-voltage mode to gradually decrease the output current until the charging module is turned off further includes:
and when the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged is lower than the current demand, the newly loaded charging module is loaded again to charge the charging object in a high-voltage mode so as to keep the sum of the currents output by the charging object as the current demand.
Furthermore, each charging module is connected with at least two charging guns, and the charging module charges a charging object through the charging guns;
correspondingly, the method further comprises the following steps:
according to the charging requirement, an idle charging module is arranged to supply power to any charging gun so as to charge a charging object connected with the charging gun.
In a second aspect, there is provided a control apparatus for regulated charging, the apparatus including:
the control module is used for setting the charging module to charge the charging object in a low-voltage mode when the voltage requirement of the charging object is not higher than a preset voltage value;
the receiving module is used for receiving the voltage requirement sent by the charging object;
the control module is further used for loading a new charging module to charge the charging object in a high-voltage mode when the current voltage requirement is higher than a preset voltage value, setting the output current of the newly loaded charging module to gradually rise from zero, and setting the charging module which performs charging in a low-voltage mode to gradually reduce the output current until the charging module is closed.
Further, the control module is further configured to:
and keeping the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged equal to the current demand.
Further, the control module is further configured to:
and when the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged is lower than the current demand, the newly loaded charging module is loaded again to charge the charging object in a high-voltage mode so as to keep the sum of the currents output by the charging object as the current demand.
Furthermore, each charging module is connected with at least two charging guns, and the charging module charges the charging object through the charging guns
Correspondingly, the control module is further configured to:
according to the charging requirement, an idle charging module is arranged to supply power to any charging gun so as to charge a charging object connected with the charging gun.
Furthermore, the control module comprises a single chip microcomputer, a level converter, a differential inductor and an output control circuit;
the IO port of the single chip microcomputer is connected with a level shifter, the level shifter is connected with a differential inductor, the differential inductor is connected with a communication port of the charging module through a resistor, and the single chip microcomputer sends an opening signal or a closing signal to the charging module through the level shifter and the differential inductor so as to control the charging module to be opened or closed;
the output port of the single chip microcomputer is connected with the output control circuit, the output control circuit is connected with the output control interface of the charging module, the charging module comprises at least one output control interface, each output control interface is connected with a charging gun, when the single chip microcomputer is connected with one output control interface through the output control circuit, the charging module supplies power to the charging gun connected with the output control interface, and the charging module charges a charging object through the charging gun.
Furthermore, the output control circuit comprises an optical coupler, the anode of the optical coupler is connected with the anode of a photosensitive diode and a first power supply, the cathode of the optical coupler is connected with the output end of the singlechip through a resistor, the cathode of the photosensitive diode is connected with the output end of the singlechip through a resistor, the collector of the optical coupler is connected with a second power supply through a resistor, the emitter of the optical coupler is connected with the base of a triode, the emitter of the triode is grounded, the emitter of the optical coupler is grounded through a capacitor, the capacitor is connected with a resistor in parallel, the collector of the triode is connected with the anode of a diode, the cathode of the diode is connected with the second power supply, the diode is connected with the coil of a relay in parallel, two contacts of the relay are connected with the output control interface of the charging module, when the relay is, and an output control interface connected with the relay is connected.
In the embodiment of the invention, in the process of switching the charging mode, the charging pile gradually releases the output current of the charging module to be closed, simultaneously loads the new charging module and gradually increases the output current, can stably charge the charging object, does not generate the phenomenon of repeated jump of current and voltage caused by mode switching of the charging module due to voltage increase, and can smoothly complete charging.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for controlling regulated charging according to an embodiment of the present invention;
fig. 2 is a block diagram of a control apparatus for voltage-stabilized charging according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a control module according to an embodiment of the present invention;
fig. 4 is a circuit diagram of another control module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a method for controlling voltage-stabilized charging according to an embodiment of the present invention is shown, where the method is applied to a charging pile, and the method specifically includes the following steps.
The charging object is a charging object matched with the charging pile, for example, the charging pile is a charging pile for charging an electric automobile, and the charging object is the electric automobile. The embodiment of the present invention does not specifically limit the charging target, and may be other devices besides an electric vehicle. Fill and to set up a plurality of guns that charge on the electric pile, every rifle that charges can connect a charging object, fills electric pile and charges for charging object through the rifle that charges.
When charging the charging object, the charging object can continuously send the charging requirement of the charging object to the charging pile, wherein the charging requirement comprises a voltage requirement and a current requirement, so that the charging pile outputs the voltage and the current meeting the requirement of the charging object based on the received charging requirement. The voltage demand of the charging object is in a gradual rising trend, and in the initial stage of charging, the voltage demand of the charging object is less than or equal to a preset voltage value, and at the moment, the charging module charges the charging object in a low-voltage mode. And when the voltage requirement is greater than a preset voltage value, the charging module charges the charging object in a high-voltage mode. The preset voltage value is a voltage that the charging module needs a high voltage mode to output, for example, 500V. Charging pile selects proper charging mode to charge according to the voltage requirement of the charging object instead of charging in high-voltage mode all the time, because low-voltage mode output power is large and high-voltage mode output power is small, when the voltage requirement of the charging object is less than or equal to a preset voltage value, the charging pile charges in low-voltage mode, the number of modules used under the same power requirement can be reduced, and other idle charging modules can charge other charging objects.
And 102, receiving the voltage requirement sent by the charging object again.
The charging object sends the current demand while sending the voltage demand to charging stake, that is to say, when the voltage demand that the charging stake sent is receiving the charging object, the current demand that the receiving charging object sent simultaneously.
And 103, if the current voltage requirement is higher than a preset voltage value, loading a new charging module to charge the charging object in a high-voltage mode.
And 104, setting the output current of the newly loaded charging module to gradually rise from zero, and simultaneously setting the charging module which performs charging in a low-voltage mode to gradually reduce the output current until the charging module is closed.
In the process of charging the charging object by the charging pile, if the current voltage requirement received by the charging pile is higher than a preset voltage value and the charging mode of the charging module supplying power to the charging object is a low-voltage mode, all the charging modules charging the charging object need to be switched to a high-voltage mode.
The process of charging pile for switching charging modes may include: and loading a new charging module to charge the charging object in a high-voltage mode, setting the output current of the newly loaded charging module to gradually rise from zero, and setting the charging module which performs charging in a low-voltage mode to gradually reduce the output current until the charging module is closed. In the process of switching the charging mode, the sum of the currents output by the charging pile for the charging object needs to be kept as the current requirement, that is, the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged is kept equal to the current requirement. Fill electric pile at the in-process that the mode of charging switched, discharge gradually and wait to close the output current of the module of charging, load new module of charging simultaneously and rise output current gradually to make the steady switching of carrying out the mode of charging of filling electric pile, the phenomenon that the mode of charging jumps repeatedly can not appear, accomplish smoothly and charge, can reduce the impact to the charging object battery moreover.
In the process of switching the charging mode, the charging pile can load a new charging module at any time to charge the charging object so as to meet the current requirement of the charging object. In one case, as the output current of the charging module to be turned off gradually decreases, even if the output currents of the other charging modules are set to the highest values, the sum of the currents output by the charging pile for the charging object may not meet the current requirement, and then a new charging module may be loaded to charge the charging object in a high-voltage mode, so that the sum of the currents output by the charging pile for the charging object is kept as the current requirement.
When the voltage requirement of the charging object does not exceed the preset voltage value, and the charging pile only uses one charging module to charge the charging object, if the charging mode of the charging object needs to be switched, one or more charging modules can be reloaded to replace the charging module which is charging in the low-voltage mode, so as to switch the charging module which is charging the charging object to the high-voltage mode.
When the voltage requirement of the charging object does not exceed the preset voltage value, the charging pile uses the plurality of charging modules to charge the charging object, if the charging mode of the charging object needs to be switched, for each charging module which is charging in the low-voltage mode, the charging module can be replaced by the newly-loaded charging module one by one according to the above charging mode switching mode, and therefore the charging modules which charge the charging object are all switched to the high-voltage mode. When the charging pile charges a charging object by using a plurality of charging modules, in the process of switching the charging mode, the output currents of the current to-be-closed charging module and the newly-loaded charging module can be adjusted, and the output currents of any other charging module which is charging can be flexibly adjusted so as to meet the current requirement of the charging object.
Fill electric pile and include two at least rifle that charge, fill every module that charges in electric pileAll the charging guns on the pile can be connected. In the charging process of the charging pile, each charging module can be flexibly controlled to supply power to any charging gun according to the charging requirement so as to charge corresponding charging objects, thereby improving the utilization rate of the charging modules,reduce the demand quantity of the module that charges in filling electric pile.
In the embodiment of the invention, in the process of switching the charging mode, the charging pile gradually releases the output current of the charging module to be closed, simultaneously loads the new charging module and gradually increases the output current, can stably charge the charging object, has small fluctuation of the charging voltage and the charging current, does not generate the phenomenon of repeated jump of the current and the voltage caused by the mode switching of the charging module due to the voltage increase, and can smoothly complete the charging.
Referring to fig. 2, a block diagram of a structure of a control apparatus for voltage-stabilized charging according to an embodiment of the present invention is shown, where the apparatus includes:
the control module 201 is configured to set the charging module to charge the charging object in a low-voltage mode when the voltage requirement of the charging object is not higher than a preset voltage value;
a receiving module 202, configured to receive a voltage requirement sent by the charging object;
the control module 201 is further configured to load a new charging module to charge the charging object in a high-voltage mode when the current voltage demand is higher than a preset voltage value, set the output current of the newly loaded charging module to gradually increase from zero, and set the charging module that performs charging in a low-voltage mode to gradually decrease the output current until the charging module is turned off.
Preferably, the control module 201 is further configured to keep the sum of the output current of the newly loaded charging module and the output current of the charging module that is being charged equal to the current demand.
Preferably, the control module 201 is further configured to, when the sum of the output current of the newly loaded charging module and the output current of the charging module that is being charged is lower than the current demand, reload the new charging module to charge the charging object in a high-voltage mode, so as to keep the sum of the currents output to the charging object as the current demand.
Preferably, each charging module is connected with at least two charging guns, and the charging module charges the charging object through the charging guns
Correspondingly, the control module 201 is further configured to set an idle charging module to supply power to any charging gun according to a charging requirement, so as to charge a charging object connected to the charging gun.
Further, as shown in fig. 3, the control module 201 includes a single chip Microcomputer (MCU) U1, an IO port of the single chip microcomputer U1 is connected to a level shifter U2, the level shifter U2 is connected to a differential inductor L, and the differential inductor L is connected to a communication port P of the charging module through a resistor. Further, the resistor connected to the differential inductor L may be connected to the communication port P of the charging module through a CAN (Controller Area Network) bus. The single chip microcomputer U1 sends an on signal or an off signal to the charging module through the level shifter U2 and the differential inductor L to control the charging module to be turned on or turned off.
The level shifter U2 is used To convert TTL (Time To Live) signals of the single chip microcomputer U1 into differential signals, and the differential inductor L plays a role in isolation and filtering.
The output port of the singlechip U1 is connected with an output control circuit C, the output control circuit C is connected with an output control interface PC of a charging module, the charging module comprises at least one output control interface PC, each output control interface PC is connected with a charging gun, and when the output control circuit C is connected with one output control interface PC, the charging module supplies power to the charging gun connected with the output control interface PC.
In the implementation, every fills electric pile and can connect a plurality of guns that charge, can set up on the module of charging and the corresponding output control interface quantity of rifle quantity that charges. For example, fill electric pile and connect two guns that charge, the module that charges can set up two output control interface PC equally, and every output control interface PC connects a rifle that charges. The singlechip U1 selects the charging gun connected with the charging module by setting the on-off of the output control interface PC, so that the charging object is charged by the connected charging gun.
Since the output control circuit C connected to each output control interface PC is the same, referring to fig. 4 (only two output control circuits are shown), the circuit composition of the output control circuit will be described by taking the output control circuit C1 as an example. The output control circuit C1 comprises an optical coupler OC1, the anode of the optical coupler OC1 is connected with the anode of a photosensitive diode LDE1 and a first power supply, the cathode of the optical coupler OC1 is connected with the output end of the singlechip U1 through a resistor, the cathode of the photosensitive diode LDE1 is connected with the output end of the singlechip U1 through a resistor, the collector of the optical coupler OC1 is connected with a second power supply through a resistor, the emitter of the optical coupler OC1 is connected with the base of a triode Q1, the emitter of a triode D1 is grounded, the emitter of the optical coupler OC1 is grounded through a capacitor C1, a capacitor C1 is connected with a resistor in parallel, the collector of the triode Q1 is connected with the anode of a diode D1, the cathode of the diode D1 is connected with a second power supply, the diode D1 is connected with the coil of a relay K1 in parallel, two contacts of, when the relay K1 is turned on, the output control interface PC1 connected to the relay K1 is turned on.
In the initial stage of charging the charging object by the charging pile, the voltage requirement of the charging object is not higher than a preset voltage value, for example, 500V, the single chip microcomputer can start the charging module through the level shifter and the differential inductor, the charging mode is set to be a low-voltage mode, and meanwhile, the single chip microcomputer is connected with an output control interface connected with the charging object in the charging mode through the output control circuit, so that the charging object is charged in the low-voltage mode. When the required voltage of the charging object is gradually increased to be higher than the preset voltage value, namely the charging mode of the charging object needs to be switched from the low-voltage mode to the high-voltage mode, the single chip microcomputer can load a new charging module through the level shifter and the differential inductor, set the charging mode to be the high-voltage mode, and simultaneously switch on an output control interface connected with the charging object in the charging mode through the output control circuit, so that the new charging module is loaded to charge the charging object in the high-voltage mode. When a new charging module is loaded, the single chip microcomputer sets the output current of the newly loaded charging module to gradually rise from zero through the level converter and the differential inductor, and sets the gradually leakage current of the charging module which is charged in a low-voltage mode, namely, the output current is reduced until the charging module is closed, so that the current sum output by the charging pile for a charging object is kept as the current requirement. In the charging process, the charging object can be charged stably, the phenomenon that the current and the voltage jump repeatedly due to the mode switching of the charging module due to the rising of the voltage can be avoided, and the charging can be finished smoothly.
It should be noted that the control apparatus for voltage-stabilized charging and the control method embodiment for voltage-stabilized charging provided in the foregoing embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiment and are not described herein again.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for controlling regulated charging, the method comprising:
when the voltage requirement of a charging object is not higher than a preset voltage value, setting a charging module to charge the charging object in a low-voltage mode;
receiving the voltage requirement sent by the charging object again;
if the current voltage requirement is higher than the preset voltage value, loading a new charging module to charge the charging object in a high-voltage mode;
the output current of the newly loaded charging module is set to gradually rise from zero, and meanwhile, the output current of the charging module which is set to be charged in a low-voltage mode is gradually reduced until the charging module is closed.
2. The method of claim 1, further comprising:
when receiving a voltage demand sent by the charging object, simultaneously receiving a current demand sent by the charging object;
correspondingly, the step of setting the output current of the newly loaded charging module to gradually rise from zero, and simultaneously setting the charging module which performs charging in the low-voltage mode to gradually reduce the output current until the charging module is turned off comprises the following steps:
and keeping the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged equal to the current demand.
3. The method of claim 2, wherein the step of setting the output current of the newly loaded charging module to gradually increase from zero while setting the charging module to gradually decrease the output current until shutdown, further comprises:
and when the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged is lower than the current demand, the newly loaded charging module is loaded again to charge the charging object in a high-voltage mode so as to keep the sum of the currents output by the charging object as the current demand.
4. The method according to claim 1, wherein each charging module is connected with at least two charging guns, and the charging module charges the charging object through the charging guns;
correspondingly, the method further comprises the following steps:
according to the charging requirement, an idle charging module is arranged to supply power to any charging gun so as to charge a charging object connected with the charging gun.
5. A control apparatus for constant voltage charging, the apparatus comprising:
the control module is used for setting the charging module to charge the charging object in a low-voltage mode when the voltage requirement of the charging object is not higher than a preset voltage value;
the receiving module is used for receiving the voltage requirement sent by the charging object;
the control module is further used for loading a new charging module to charge the charging object in a high-voltage mode when the current voltage requirement is higher than the preset voltage value, setting the output current of the newly loaded charging module to gradually rise from zero, and setting the charging module which performs charging in a low-voltage mode to gradually reduce the output current until the charging module is closed.
6. The apparatus of claim 5, wherein the control module is further configured to:
and keeping the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged equal to the current demand.
7. The apparatus of claim 6, wherein the control module is further configured to:
and when the sum of the output current of the newly loaded charging module and the output current of the original charging module which is being charged is lower than the current demand, the newly loaded charging module is loaded again to charge the charging object in a high-voltage mode so as to keep the sum of the currents output by the charging object as the current demand.
8. The device of claim 5, wherein each charging module is connected with at least two charging guns, and the charging module charges the charging object through the charging guns;
correspondingly, the control module is further configured to:
according to the charging requirement, an idle charging module is arranged to supply power to any charging gun so as to charge a charging object connected with the charging gun.
9. The device of claim 5, wherein the control module comprises a single chip, a level shifter, a differential inductor, and an output control circuit;
the IO port of the single chip microcomputer is connected with a level shifter, the level shifter is connected with a differential inductor, the differential inductor is connected with a communication port of the charging module through a resistor, and the single chip microcomputer sends an opening signal or a closing signal to the charging module through the level shifter and the differential inductor so as to control the charging module to be opened or closed;
the output port of the single chip microcomputer is connected with the output control circuit, the output control circuit is connected with the output control interface of the charging module, the charging module comprises at least one output control interface, each output control interface is connected with a charging gun, when the single chip microcomputer is connected with one output control interface through the output control circuit, the charging module supplies power to the charging gun connected with the output control interface, and the charging module charges a charging object through the charging gun.
10. The device of claim 9, wherein the output control circuit comprises an optocoupler, an anode of the optocoupler is connected with an anode of a photodiode and a first power supply, a cathode of the optocoupler is connected with the output end of the single chip microcomputer through a resistor, a cathode of the photodiode is connected with the output end of the single chip microcomputer through a resistor, a collector of the optocoupler is connected with a second power supply through a resistor, an emitter of the optocoupler is connected with a base of a triode, an emitter of the triode is grounded, an emitter of the optocoupler is grounded through a capacitor, the capacitor is connected with a resistor in parallel, a collector of the triode is connected with an anode of a diode, a cathode of the diode is connected with the second power supply, the diode is connected with a coil of a relay in parallel, and two contacts of the relay are connected with the output control interface of the charging, when the relay is switched on, an output control interface connected with the relay is switched on.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024984A1 (en) * | 2021-08-26 | 2023-03-02 | Oppo广东移动通信有限公司 | Current control circuit, electrical energy supply apparatus and related product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023024984A1 (en) * | 2021-08-26 | 2023-03-02 | Oppo广东移动通信有限公司 | Current control circuit, electrical energy supply apparatus and related product |
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