CN111216574B - Charging and discharging control system, method and device and control equipment - Google Patents
Charging and discharging control system, method and device and control equipment Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 281
- 238000006243 chemical reaction Methods 0.000 claims abstract description 229
- 238000004146 energy storage Methods 0.000 claims abstract description 44
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 25
- 230000006870 function Effects 0.000 claims description 77
- 238000004590 computer program Methods 0.000 claims description 22
- 230000006641 stabilisation Effects 0.000 claims description 17
- 238000011105 stabilization Methods 0.000 claims description 17
- 238000002955 isolation Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 8
- 206010014357 Electric shock Diseases 0.000 description 7
- 230000006378 damage Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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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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- 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
- Y02T10/72—Electric energy management in electromobility
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
The invention discloses a charging and discharging control system, a charging and discharging control method, a charging and discharging control device, control equipment and a computer storage medium, wherein the charging and discharging control system comprises a bidirectional charging device and a processing module; the bidirectional charging device comprises an alternating current connector, a first bidirectional AC/DC conversion module and an energy storage voltage stabilizing module which are sequentially connected; the processing module is connected with the first bidirectional AC/DC conversion module, when the processing module receives a discharge stopping instruction, the processing module does not directly stop the first bidirectional AC/DC conversion module from stopping, but turns on the reverse function of the first bidirectional AC/DC conversion module, namely, the function mode of the first bidirectional AC/DC conversion module is switched from the original function mode of converting direct current into alternating current into direct current, and the residual energy of the alternating current connector is transferred to the energy storage voltage stabilizing module, so that the voltage of the alternating current connector can be ensured to be quickly reduced, and the situation that after discharge is finished, the personal safety is harmed due to accidental electric shock and the like caused by residual voltage of the alternating current connector can be avoided.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a bidirectional charger, an external discharging method thereof and a new energy automobile comprising the bidirectional charger.
Background
The traditional charger converts alternating current of a power grid into direct current and then charges a power battery, and energy is converted into unidirectional transmission. Compared with the traditional unidirectional energy transfer, the bidirectional charger is gradually developing towards the bidirectional charger, and the bidirectional charger is added with the function of external discharge on the basis of the traditional unidirectional charging function. The bidirectional charger can realize bidirectional transfer of energy conversion, so that the electric automobile can become an energy supply device for realizing external discharge, the distributed Grid-connected discharge (V2G, Vehicle to Grid) of the Vehicle-to-power Grid for realizing wave crest and trough regulation, the emergency rescue discharge (V2V, Vehicle to Vehicle) of the Vehicle-to-Vehicle, and the discharge (V2L, Vehicle to Load) of the Vehicle-to-electric appliance are realized.
At present, according to the existing charging machine, residual voltage still exists in an alternating current socket after discharging is completed by adopting an external discharging scheme, even the alternating current socket is discharged for reducing bus capacitance voltage, electric shock risks exist, and once an electric shock emergency occurs, great harm can be caused to personnel.
Disclosure of Invention
The invention aims to provide a charging and discharging control system, a charging and discharging control method and a charging and discharging control device, which can solve the problems of electric shock risk and personnel injury of the conventional bidirectional charger, greatly improve the discharging safety of the bidirectional charger, realize an active safety protection function, ensure the rapid reduction of alternating current side voltage in emergency occasions, and greatly reduce the electric shock injury to personnel.
To achieve the above object, the present invention provides a charge and discharge control system including:
the bidirectional charging device comprises a bidirectional charging device and a processing module; the bidirectional charging device comprises an alternating current connector, a first bidirectional AC/DC conversion module and an energy storage voltage stabilizing module which are sequentially connected; the processing module is connected with the first bidirectional AC/DC conversion module;
the alternating current connector is used for accessing alternating current or outputting the alternating current;
the first bidirectional AC/DC conversion module is used for converting the alternating current input from the alternating current connector into direct current or converting the direct current input from the energy storage voltage stabilizing module into alternating current;
the energy storage and voltage stabilization module is used for receiving input direct current to store energy and stabilize voltage;
the processing module is used for executing the following program modules:
the discharging instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting direct current into alternating current when a discharging instruction is received;
the discharging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current when a discharging stopping instruction is received, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value or not;
the first judging module is used for controlling the first bidirectional AC/DC conversion module to stop working when the voltage of the alternating current connector is judged to be smaller than a preset threshold value;
and the second judging module is used for controlling the first bidirectional AC/DC conversion module to continuously start the function of converting the alternating current into the direct current when the voltage of the alternating current connector is judged to be greater than or equal to the preset threshold value, and continuously judging whether the voltage of the alternating current connector is smaller than the preset threshold value.
Compared with the prior art, the invention does not directly stop the first bidirectional AC/DC conversion module from stopping when receiving the command of stopping discharging, but turns on the reverse function, namely, the function mode of the first bidirectional AC/DC conversion module is switched from the original function mode of converting direct current into alternating current into direct current, and the voltage of the alternating current connector can be ensured to be rapidly reduced by transferring the residual energy of the alternating current connector to the energy storage voltage stabilizing module, thereby avoiding the situation that the personal safety is damaged due to accidental electric shock and the like caused by residual voltage of the alternating current connector after discharging.
As an improvement of the above solution, the processing module is further configured to execute the following program modules in only one step:
the charging instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current when a charging instruction is received;
and the charging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to stop working when receiving a charging stopping instruction.
As an improvement of the above scheme, the bidirectional charging device further includes a second bidirectional AC/DC conversion module and a third bidirectional AC/DC conversion module, and the AC connector, the first bidirectional AC/DC conversion module, the energy storage voltage stabilizing module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module are connected in sequence; the processing module is respectively connected with the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module; wherein the content of the first and second substances,
the energy storage and voltage stabilization module is specifically configured to store and stabilize the direct current output by the first bidirectional AC/DC conversion module, or receive the direct current input by the second bidirectional AC/DC conversion module to store and stabilize the direct current;
the second bidirectional AC/DC conversion module is used for converting the direct current output by the energy storage voltage stabilizing module into alternating current or converting the alternating current input by the third bidirectional AC/DC conversion module into direct current;
the third bidirectional AC/DC conversion module is used for converting the alternating current input by the second bidirectional AC/DC conversion module into direct current or converting the direct current input by the battery module into alternating current;
the discharge instruction receiving module is specifically configured to, when receiving a discharge instruction, control the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting direct current into alternating current, and control the second bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
the discharge stopping instruction receiving module is specifically configured to control the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working when a discharge stopping instruction is received, control the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and determine whether the voltage of the alternating current connector is smaller than a preset threshold value;
the first judging module is specifically configured to control the first bidirectional AC/DC converting module to stop working when it is judged that the voltage of the AC connector is smaller than a preset threshold;
the second determining module is specifically configured to, when it is determined that the voltage of the AC connector is greater than or equal to a preset threshold, control the first bidirectional AC/DC converting module to continue to start a function of converting AC power into DC power, and continue to determine whether the voltage of the AC connector is less than the threshold.
As an improvement of the above solution, the charging instruction receiving module is specifically configured to, when receiving a charging instruction, control the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and control the second bidirectional AC/DC conversion module to start a function of converting direct current into alternating current;
the charging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working when receiving a charging stopping instruction.
As an improvement of the above scheme, the bidirectional charger further includes an isolation transformer, one end of the isolation transformer is connected with the second bidirectional AC/DC conversion module, and the other end of the isolation transformer is connected with the third bidirectional AC/DC conversion module; the energy storage voltage stabilizing module is a bus capacitor, and the alternating current connector is an alternating current socket.
As an improvement of the above scheme, the charging and discharging control system is an automobile, the processing module is a vehicle control unit, and the bidirectional charging device is a bidirectional charger; or, the charging and discharging control system is a bidirectional charger.
The embodiment of the invention also correspondingly provides a charging and discharging control method, which is suitable for a bidirectional charger, wherein the bidirectional charger comprises an alternating current connector, a first bidirectional AC/DC conversion module and an energy storage voltage stabilizing module which are sequentially connected; wherein the content of the first and second substances,
the alternating current connector is used for accessing alternating current or outputting the alternating current;
the first bidirectional AC/DC conversion module is used for converting the alternating current input from the alternating current connector into direct current or converting the direct current input from the energy storage voltage stabilizing module into alternating current;
the energy storage and voltage stabilization module is used for receiving input direct current to store energy and stabilize voltage;
characterized in that the charge and discharge control method comprises the steps of:
when a discharging instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting direct current into alternating current;
when a discharging stopping instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value;
when the voltage of the alternating current connector is judged to be smaller than a preset threshold value, controlling the first bidirectional AC/DC conversion module to stop working;
and when the voltage of the alternating current connector is judged to be greater than or equal to a preset threshold value, controlling the first bidirectional AC/DC conversion module to continuously start the function of converting alternating current into direct current, and continuously judging whether the voltage of the alternating current connector is smaller than the threshold value.
As an improvement of the above, the method further comprises:
when a charging instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
and when receiving a charging stopping instruction, controlling the first bidirectional AC/DC conversion module to stop working.
As an improvement of the above scheme, the bidirectional charger further includes a second bidirectional AC/DC conversion module and a third bidirectional AC/DC conversion module, wherein the AC connector, the first bidirectional AC/DC conversion module, the energy storage and voltage stabilization module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module are connected in sequence;
the energy storage and voltage stabilization module is specifically configured to store and stabilize the direct current output by the first bidirectional AC/DC conversion module, or receive the direct current input by the second bidirectional AC/DC conversion module to store and stabilize the direct current;
the second bidirectional AC/DC conversion module is used for converting the direct current output by the energy storage voltage stabilizing module into alternating current or converting the alternating current input by the third bidirectional AC/DC conversion module into direct current;
the third bidirectional AC/DC conversion module is used for converting the alternating current input by the second bidirectional AC/DC conversion module into direct current or converting the direct current input by the battery module into alternating current;
the charge and discharge control method specifically includes the steps of:
when a discharging instruction is received, controlling the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting direct current into alternating current, and controlling the second bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
when a discharging stopping instruction is received, controlling the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value or not;
when the voltage of the alternating current connector is judged to be smaller than a preset threshold value, controlling the first bidirectional AC/DC conversion module to stop working;
and when the voltage of the alternating current connector is judged to be greater than or equal to a preset threshold value, controlling the first bidirectional AC/DC conversion module to continuously start the function of converting alternating current into direct current, and continuously judging whether the voltage of the alternating current connector is smaller than the threshold value.
As an improvement of the above, the method further comprises the steps of:
when a charging instruction is received, controlling the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and controlling the second bidirectional AC/DC conversion module to start a function of converting direct current into alternating current;
and when a charging stopping instruction is received, controlling the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working.
Correspondingly, the embodiment of the invention also provides a control device, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor realizes the charging and discharging control method according to any one of the above items when executing the computer program.
The embodiment of the invention also correspondingly provides a storage medium, which comprises a stored computer program, wherein when the computer program runs, the equipment where the storage medium is located is controlled to execute any one of the charging and discharging control methods.
Drawings
FIG. 1 is a schematic diagram of a charging and discharging system according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a charging and discharging system according to one embodiment of the present invention;
FIG. 3 is a flowchart of the operation of a charging and discharging method according to one embodiment of the present invention;
fig. 4 is a flowchart of the charging and discharging method according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, the charging and discharging control system provided by the present invention includes a bidirectional charging device 1 and a processing module 2; the bidirectional charging device 1 comprises an alternating current connector 11, a first bidirectional AC/DC conversion module 12 and an energy storage voltage stabilizing module 13 which are connected in sequence; the processing module 2 is connected with the first bidirectional AC/DC conversion module 12;
the alternating current connector 11 is used for accessing alternating current or outputting alternating current;
the first bidirectional AC/DC conversion module 12 is configured to convert the alternating current input from the alternating current connector 11 into direct current, or convert the direct current input from the energy storage voltage stabilizing module 13 into alternating current;
the energy storage and voltage stabilization module 13 is used for receiving input direct current to store energy and stabilize voltage;
the processing module 2 is used for executing the following program modules:
a discharge instruction receiving module 21, configured to control the first bidirectional AC/DC conversion module to start a function of converting direct current into alternating current when a discharge instruction is received;
a discharge stopping instruction receiving module 22, configured to, when receiving a discharge stopping instruction, control the first bidirectional AC/DC conversion module 12 to start a function of converting AC power into DC power, and determine whether the voltage of the AC connector 11 is smaller than a preset threshold;
the first judging module 23 is configured to control the first bidirectional AC/DC converting module to stop working when the voltage of the AC connector is judged to be smaller than a preset threshold;
the second determining module 24 is configured to, when it is determined that the voltage of the AC connector is greater than or equal to a preset threshold, control the first bidirectional AC/DC converting module 12 to continue to start a function of converting AC power into DC power, and continue to determine whether the voltage of the AC connector 11 is less than the preset threshold.
Preferably, the charging and discharging control system is an automobile, the processing module 2 is a vehicle control unit of the automobile, the bidirectional charging device 1 is a bidirectional charger, and a battery module in the automobile can be connected with the bidirectional charger, so that the charging is performed through the bidirectional charger, or the discharging is performed through the bidirectional charger. At this time, the vehicle control unit directly controls the conversion direction of the first bidirectional AC/DC conversion module 12, and a built-in processing chip is not required in the bidirectional charger for control.
In another preferred embodiment, the charging and discharging control system is a bidirectional charger, and the processing module is a controller built in the bidirectional charger, and can receive control commands from a car controller or a mobile phone APP, etc. to control the conversion direction of the first bidirectional AC/DC conversion module 12, so as to determine the discharging or charging of the bidirectional charger. It will be appreciated that the processing module 2 is also adapted to execute the following program modules in only one step:
the charging instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current when a charging instruction is received;
and the charging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to stop working when receiving a charging stopping instruction.
Referring to fig. 2, the bidirectional charging device 1 further includes a second bidirectional AC/DC conversion module 14 and a third bidirectional AC/DC conversion module 16, and the AC connector 11, the first bidirectional AC/DC conversion module 12, the energy storage and voltage stabilization module 13, the second bidirectional AC/DC conversion module 14 and the third bidirectional AC/DC conversion module 16 are connected in sequence; the processing module 2 is connected with the first bidirectional AC/DC conversion module 12, the second bidirectional AC/DC conversion module 14 and the third bidirectional AC/DC conversion module 16 respectively; wherein the content of the first and second substances,
the energy storage and voltage stabilization module 13 is specifically configured to store and stabilize the direct current output by the first bidirectional AC/DC conversion module 14, or receive the direct current input by the second bidirectional AC/DC conversion module 16 to store and stabilize the direct current;
the second bidirectional AC/DC conversion module 14 is configured to convert the direct current output by the energy storage voltage stabilizing module 13 into alternating current, or convert the alternating current input by the third bidirectional AC/DC conversion module 16 into direct current;
the third bidirectional AC/DC conversion module 16 is configured to convert the AC power input by the second bidirectional AC/DC conversion module 14 into DC power, or convert the DC power input by the battery module into AC power;
it should be noted that the battery module may be provided in the charging and discharging system, or may be provided outside the charging and discharging system, and is connected to the third bidirectional AC/DC conversion module 16 as an external component. The battery module is used for receiving the direct current input by the third bidirectional AC/DC conversion module 16 for charging, or outputting the direct current to the third bidirectional AC/DC conversion module 16 for discharging.
The discharge instruction receiving module 21 is specifically configured to, when receiving a discharge instruction, control the first bidirectional AC/DC conversion module 14 and the third bidirectional AC/DC conversion module 16 to turn on a function of converting direct current into alternating current, and control the second bidirectional AC/DC conversion module 14 to turn on a function of converting alternating current into direct current;
the discharge stopping instruction receiving module 22 is specifically configured to, when receiving a discharge stopping instruction, control the second bidirectional AC/DC conversion module 14 and the third bidirectional AC/DC conversion module 16 to stop working, control the first bidirectional AC/DC conversion module 14 to start a function of converting alternating current into direct current, and determine whether the voltage of the alternating current connector 11 is smaller than a preset threshold;
the first determining module 23 is specifically configured to control the first bidirectional AC/DC converting module 12 to stop working when it is determined that the voltage of the AC connector 11 is smaller than a preset threshold;
for the first judging module 23, when the voltage of the ac connector 11 is smaller than the preset threshold, it may be determined that the current ac connector belongs to a range acceptable for human body safety, and at this time, the collection of the residual ac power may be stopped.
The second determining module 24 is specifically configured to, when it is determined that the voltage of the AC connector 11 is greater than or equal to a preset threshold, control the first bidirectional AC/DC converting module 12 to continue to start the function of converting AC power into DC power, and continue to determine whether the voltage of the AC connector 11 is less than the threshold.
Therefore, after the discharging is finished, the first bidirectional AC/DC conversion module 12 is not directly stopped to stop working, but the reverse function is turned on, that is, the function mode of the first bidirectional AC/DC conversion module 12 is switched from the original function mode of converting direct current into alternating current into direct current, and the energy remaining in the AC connector 11 is transferred to the energy storage voltage stabilizing module 13, so that the voltage of the AC connector 11 can be ensured to be rapidly reduced, and the situation that the personal safety is damaged due to accidental electric shock and the like of the personal caused by the residual voltage of the AC connector 11 after the discharging is finished can be avoided.
Preferably, the energy storage and voltage stabilization module 13 is a bus capacitor, and the ac connector 11 is an ac socket for receiving ac power such as commercial power.
In addition, in order to ensure the isolation of the second bidirectional AC/DC conversion module 14 and the third bidirectional AC/DC conversion module 16, the bidirectional charging device 1 further includes an isolation transformer 15, one end of the isolation transformer 15 is connected to the second bidirectional AC/DC conversion module 14, and the other end is connected to the third bidirectional AC/DC conversion module 16.
It can be understood that, in addition to the discharging function, the charging and discharging control system has a charging function, and the charging instruction receiving module is specifically configured to, when receiving a charging instruction, control the first bidirectional AC/DC conversion module 12 and the third bidirectional AC/DC conversion module 16 to turn on a function of converting alternating current into direct current, and control the second bidirectional AC/DC conversion module 14 to turn on a function of converting direct current into alternating current;
the charging stopping instruction receiving module is configured to control the first bidirectional AC/DC conversion module 12, the second bidirectional AC/DC conversion module 14, and the third bidirectional AC/DC conversion module 16 to stop working when receiving a charging stopping instruction.
Through the scheme, after the discharging is finished, the conversion direction of the first bidirectional AC/DC conversion module 12 is actively controlled (namely, the alternating current is converted into the direct current, and the residual after the discharging can be stored in the energy storage element through the direct current, so that the voltage of the alternating current connector 11 is lower than a preset threshold value (namely, in a safety range), the active safety protection function is realized, the rapid reduction of the alternating current side voltage in an emergency can be ensured, the electric shock risk is greatly reduced, and the power utilization safety is ensured.
Referring to fig. 3, a charging and discharging control method provided in an embodiment of the present invention is applicable to a bidirectional charger, where the bidirectional charger includes an AC connector, a first bidirectional AC/DC conversion module, and an energy storage and voltage stabilization module, which are connected in sequence; wherein the content of the first and second substances,
the alternating current connector is used for accessing alternating current or outputting the alternating current;
the first bidirectional AC/DC conversion module is used for converting the alternating current input from the alternating current connector into direct current or converting the direct current input from the energy storage voltage stabilizing module into alternating current;
the energy storage and voltage stabilization module is used for receiving input direct current to store energy and stabilize voltage;
the charge and discharge control method includes the steps of:
s1, when a discharging instruction is received, controlling the first bidirectional AC/DC conversion module to start the function of converting direct current into alternating current;
s2, when a discharging stopping instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value;
s3, when the voltage of the alternating current connector is judged to be smaller than a preset threshold value, controlling the first bidirectional AC/DC conversion module to stop working;
and S4, when the voltage of the alternating current connector is judged to be greater than or equal to a preset threshold value, controlling the first bidirectional AC/DC conversion module to continuously start the function of converting the alternating current into the direct current, and continuously judging whether the voltage of the alternating current connector is smaller than the threshold value.
In addition, when a charging instruction is received, the first bidirectional AC/DC conversion module is controlled to start the function of converting alternating current into direct current;
and when receiving a charging stopping instruction, controlling the first bidirectional AC/DC conversion module to stop working.
Preferably, the bidirectional charger further comprises a second bidirectional AC/DC conversion module and a third bidirectional AC/DC conversion module, wherein the AC connector, the first bidirectional AC/DC conversion module, the energy storage and voltage stabilization module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module are connected in sequence;
the energy storage and voltage stabilization module is specifically configured to store and stabilize the direct current output by the first bidirectional AC/DC conversion module, or receive the direct current input by the second bidirectional AC/DC conversion module to store and stabilize the direct current;
the second bidirectional AC/DC conversion module is used for converting the direct current output by the energy storage voltage stabilizing module into alternating current or converting the alternating current input by the third bidirectional AC/DC conversion module into direct current;
the third bidirectional AC/DC conversion module is used for converting the alternating current input by the second bidirectional AC/DC conversion module into direct current or converting the direct current input by the battery module into alternating current;
the charge and discharge control method specifically includes the steps of:
s11, when a discharging instruction is received, controlling the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting direct current into alternating current, and controlling the second bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
s12, when a discharging stopping instruction is received, controlling the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value;
s13, when the voltage of the alternating current connector is judged to be smaller than a preset threshold value, controlling the first bidirectional AC/DC conversion module to stop working;
and S14, when the voltage of the alternating current connector is judged to be greater than or equal to a preset threshold value, controlling the first bidirectional AC/DC conversion module to continuously start the function of converting the alternating current into the direct current, and continuously judging whether the voltage of the alternating current connector is smaller than the threshold value.
In addition, the method further comprises the steps of:
when a charging instruction is received, controlling the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and controlling the second bidirectional AC/DC conversion module to start a function of converting direct current into alternating current;
and when a charging stopping instruction is received, controlling the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working.
It should be noted that, when a processor is built in the charger, the method can be executed by the processor built in the charger; besides, when the charger is installed on a vehicle (e.g., a new energy vehicle), the method may also be performed by a vehicle controller or other controllers of the vehicle.
For a specific implementation process of the charging and discharging control method according to the embodiment of the present invention, reference may be made to the above description of the charging and discharging control system, and details are not repeated here.
Correspondingly, the embodiment of the invention also provides a control device, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program and the charging and discharging control method is any one of the charging and discharging control methods.
The embodiment of the present invention also provides a storage medium, where the storage medium includes a stored computer program, where, when the computer program runs, a device in which the storage medium is located is controlled to execute any one of the above charging and discharging control methods.
Illustratively, in the above embodiments, the computer program may be divided into one or more modules/units, which are stored in the memory and executed by the processor, to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program in the terminal.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is the control center of the terminal and connects the various parts of the overall terminal using various interfaces and lines.
The memory may be used for storing the computer programs and/or modules, and the processor may implement various functions of the terminal device by executing or executing the computer programs and/or modules stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein the terminal-integrated module/unit, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (12)
1. A charging and discharging control system is characterized by comprising a bidirectional charging device and a processing module; the bidirectional charging device comprises an alternating current connector, a first bidirectional AC/DC conversion module and an energy storage voltage stabilizing module which are sequentially connected; the processing module is connected with the first bidirectional AC/DC conversion module;
the alternating current connector is used for accessing alternating current or outputting the alternating current;
the first bidirectional AC/DC conversion module is used for converting the alternating current input from the alternating current connector into direct current or converting the direct current input from the energy storage voltage stabilizing module into alternating current;
the energy storage and voltage stabilization module is used for receiving input direct current to store energy and stabilize voltage;
the processing module is used for executing the following program modules:
the discharging instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting direct current into alternating current when a discharging instruction is received;
the discharging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current when a discharging stopping instruction is received, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value or not;
the first judging module is used for controlling the first bidirectional AC/DC conversion module to stop working when the voltage of the alternating current connector is judged to be smaller than a preset threshold value;
and the second judging module is used for controlling the first bidirectional AC/DC conversion module to continuously start the function of converting the alternating current into the direct current when the voltage of the alternating current connector is judged to be greater than or equal to the preset threshold value, and continuously judging whether the voltage of the alternating current connector is smaller than the preset threshold value.
2. The charge and discharge control system of claim 1 wherein said processing module is further adapted to execute the following program modules in only one step:
the charging instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current when a charging instruction is received;
and the charging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module to stop working when receiving a charging stopping instruction.
3. The charging and discharging control system according to claim 2, wherein the bidirectional charging apparatus further comprises a second bidirectional AC/DC conversion module and a third bidirectional AC/DC conversion module, the AC connector, the first bidirectional AC/DC conversion module, the energy storage voltage stabilizing module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module being connected in sequence; the processing module is respectively connected with the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module; wherein the content of the first and second substances,
the energy storage and voltage stabilization module is specifically configured to store and stabilize the direct current output by the first bidirectional AC/DC conversion module, or receive the direct current input by the second bidirectional AC/DC conversion module to store and stabilize the direct current;
the second bidirectional AC/DC conversion module is used for converting the direct current output by the energy storage voltage stabilizing module into alternating current or converting the alternating current input by the third bidirectional AC/DC conversion module into direct current;
the third bidirectional AC/DC conversion module is used for converting the alternating current input by the second bidirectional AC/DC conversion module into direct current or converting the direct current input by the battery module into alternating current;
the discharge instruction receiving module is specifically configured to, when receiving a discharge instruction, control the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting direct current into alternating current, and control the second bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
the discharge stopping instruction receiving module is specifically configured to control the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working when a discharge stopping instruction is received, control the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and determine whether the voltage of the alternating current connector is smaller than a preset threshold value;
the first judging module is specifically configured to control the first bidirectional AC/DC converting module to stop working when it is judged that the voltage of the AC connector is smaller than a preset threshold;
the second determining module is specifically configured to, when it is determined that the voltage of the AC connector is greater than or equal to a preset threshold, control the first bidirectional AC/DC converting module to continue to start a function of converting AC power into DC power, and continue to determine whether the voltage of the AC connector is less than the threshold.
4. The charging and discharging control system according to claim 3, wherein the charging command receiving module is specifically configured to, when receiving the charging command, control the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to turn on a function of converting AC power into DC power, and control the second bidirectional AC/DC conversion module to turn on a function of converting DC power into AC power;
the charging stopping instruction receiving module is used for controlling the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working when receiving a charging stopping instruction.
5. The charging and discharging control system according to claim 4, wherein the charging and discharging control system is an automobile, the processing module is a vehicle control unit, and the bidirectional charging device is a bidirectional charger; or, the charging and discharging control system is a bidirectional charger.
6. The charge and discharge control system of claim 5 wherein the bidirectional charger further comprises an isolation transformer, one end of the isolation transformer being connected to the second bidirectional AC/DC conversion module and the other end being connected to the third bidirectional AC/DC conversion module; the energy storage voltage stabilizing module is a bus capacitor; the alternating current connector is an alternating current socket.
7. A charging and discharging control method is suitable for a bidirectional charger, wherein the bidirectional charger comprises an alternating current connector, a first bidirectional AC/DC conversion module and an energy storage voltage stabilizing module which are sequentially connected; wherein the content of the first and second substances,
the alternating current connector is used for accessing alternating current or outputting the alternating current;
the first bidirectional AC/DC conversion module is used for converting the alternating current input from the alternating current connector into direct current or converting the direct current input from the energy storage voltage stabilizing module into alternating current;
the energy storage and voltage stabilization module is used for receiving input direct current to store energy and stabilize voltage;
characterized in that the charge and discharge control method comprises the steps of:
when a discharging instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting direct current into alternating current;
when a discharging stopping instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value;
when the voltage of the alternating current connector is judged to be smaller than a preset threshold value, controlling the first bidirectional AC/DC conversion module to stop working;
and when the voltage of the alternating current connector is judged to be greater than or equal to a preset threshold value, controlling the first bidirectional AC/DC conversion module to continuously start the function of converting alternating current into direct current, and continuously judging whether the voltage of the alternating current connector is smaller than the threshold value.
8. The charge and discharge control method according to claim 7, characterized by further comprising:
when a charging instruction is received, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
and when receiving a charging stopping instruction, controlling the first bidirectional AC/DC conversion module to stop working.
9. The charging and discharging control method according to claim 7, wherein the bidirectional charger further comprises a second bidirectional AC/DC conversion module and a third bidirectional AC/DC conversion module, wherein the AC connector, the first bidirectional AC/DC conversion module, the energy storage voltage stabilizing module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module are connected in sequence;
the energy storage and voltage stabilization module is specifically configured to store and stabilize the direct current output by the first bidirectional AC/DC conversion module, or receive the direct current input by the second bidirectional AC/DC conversion module to store and stabilize the direct current;
the second bidirectional AC/DC conversion module is used for converting the direct current output by the energy storage voltage stabilizing module into alternating current or converting the alternating current input by the third bidirectional AC/DC conversion module into direct current;
the third bidirectional AC/DC conversion module is used for converting the alternating current input by the second bidirectional AC/DC conversion module into direct current or converting the direct current input by the battery module into alternating current;
the charge and discharge control method specifically includes the steps of:
when a discharging instruction is received, controlling the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting direct current into alternating current, and controlling the second bidirectional AC/DC conversion module to start a function of converting alternating current into direct current;
when a discharging stopping instruction is received, controlling the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working, controlling the first bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and judging whether the voltage of the alternating current connector is smaller than a preset threshold value or not;
when the voltage of the alternating current connector is judged to be smaller than a preset threshold value, controlling the first bidirectional AC/DC conversion module to stop working;
and when the voltage of the alternating current connector is judged to be greater than or equal to a preset threshold value, controlling the first bidirectional AC/DC conversion module to continuously start the function of converting alternating current into direct current, and continuously judging whether the voltage of the alternating current connector is smaller than the threshold value.
10. The charge and discharge control method according to claim 9, characterized by further comprising the steps of:
when a charging instruction is received, controlling the first bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to start a function of converting alternating current into direct current, and controlling the second bidirectional AC/DC conversion module to start a function of converting direct current into alternating current;
and when a charging stopping instruction is received, controlling the first bidirectional AC/DC conversion module, the second bidirectional AC/DC conversion module and the third bidirectional AC/DC conversion module to stop working.
11. A control apparatus comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the charging and discharging control method according to any one of claims 7 to 10 when executing the computer program.
12. A storage medium characterized by comprising a stored computer program, wherein an apparatus on which the storage medium is located is controlled to execute the charging and discharging control method according to any one of claims 7 to 10 when the computer program is run.
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| KR101653837B1 (en) * | 2009-12-24 | 2016-09-02 | 두산인프라코어 주식회사 | Power transformer for hybrid industrial vehicle |
| DE102010028626B4 (en) * | 2010-05-05 | 2021-09-16 | Bender Gmbh & Co. Kg | Electric vehicle charging device |
| JP5488220B2 (en) * | 2010-06-09 | 2014-05-14 | 日産自動車株式会社 | Charge control apparatus and method |
| KR101326813B1 (en) * | 2011-07-28 | 2013-11-07 | 기아자동차 주식회사 | Discharging system of remained high-voltage in hybrid vehicle and method thereof |
| IL224590A0 (en) * | 2013-02-06 | 2013-06-27 | Better Place GmbH | System and method for protecting against electric current leakages |
| CN206749561U (en) * | 2017-03-21 | 2017-12-15 | 万帮充电设备有限公司 | Residual voltage is released type electric automobile intelligent DC charging pile |
| CN108394297B (en) * | 2018-03-07 | 2021-08-24 | 深圳市品一电气有限公司 | Protection and control method for residual voltage discharge resistor of direct current charging pile |
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