CN112910036B - Charging control method, device and system - Google Patents
Charging control method, device and system Download PDFInfo
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- CN112910036B CN112910036B CN202110081058.3A CN202110081058A CN112910036B CN 112910036 B CN112910036 B CN 112910036B CN 202110081058 A CN202110081058 A CN 202110081058A CN 112910036 B CN112910036 B CN 112910036B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a charging control method, a charging control device and a charging control system, wherein the charging control method comprises the following steps: acquiring unit voltage regulation duration of each charging module; calculating a target time when all the charging modules output the target voltage simultaneously and a starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module; sending a voltage regulating instruction to the corresponding charging module at the starting moment of starting voltage regulation of each charging module, so that each charging module carries out voltage regulation according to the voltage regulating instruction; controlling the switch modules to be closed at the target moment, so that the plurality of charging modules simultaneously output target voltages at the target moment; the invention solves the problem of poor voltage following performance of a charging module in the prior art, thereby reducing the change rate of charging current in unit time, reducing the impact on the BMS, prolonging the service life of the battery, reducing the electromagnetic interference emission and reducing the failure rate of the BMS.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a charging control method, device, and system.
Background
The core part of the charging pile is a charging module, and the stable operation of the charging pile becomes a key factor for restricting the service life of the charging pile; in order to provide more electric energy for the automobile battery in unit time, the electric automobile charging pile needs to output large current. However, the charging current is large, the size and the heat dissipation are limited, and a single charging module cannot provide the large current. Currently, a parallel connection mode of multiple charging modules is generally adopted in the market, that is, each charging module is connected in parallel to a direct current bus to increase output current, and when a charging controller receives a voltage instruction sent by a Battery Management System (BMS), the charging controller directly sends a voltage regulating instruction to each charging module. However, when the change rate of the battery charging power supply is high, the voltage regulation time of each charging module is inconsistent, so that the voltage following performance of the charging module is poor, the change rate of the charging current in unit time is large, the impact on the BMS is large, the service life of the battery is influenced, the electromagnetic interference emission is large, and the BMS fault is easily caused.
It can be seen that the charging control method for the battery in the prior art has the problem of poor voltage following performance of the charging module, and the BMS fault is easily caused due to the large change rate of the current in unit time.
Disclosure of Invention
Aiming at the defects in the prior art, the charging control method, the charging control device and the charging control system provided by the invention solve the problem that the charging control method for the battery in the prior art has poor voltage following performance of a charging module, so that the change rate of charging current in unit time is reduced, the impact on a BMS is reduced, the service life of the battery is prolonged, the electromagnetic interference emission is reduced, and the failure rate of the BMS is reduced.
In a first aspect, the present invention provides a charging control method applied to a charging controller of a charging control system, where the charging control system further includes a switch module and a plurality of charging modules, and the control method includes: acquiring unit voltage regulation duration of each charging module; calculating a target time when all the charging modules output the target voltage simultaneously and a starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module; sending a voltage regulating instruction to the corresponding charging module at the starting moment of starting voltage regulation of each charging module, so that each charging module carries out voltage regulation according to the voltage regulating instruction; and controlling the switch modules to be closed at the target moment, so that the plurality of charging modules simultaneously output target voltages at the target moment.
Optionally, the obtaining the unit voltage regulation duration of each charging module includes: controlling the current charging module to output an initial voltage; sending a test instruction to the current charging module and recording a first moment of sending the test instruction, so that the current charging module performs voltage regulation according to the test voltage in the test instruction; when the current charging module is detected to be regulated to the test voltage, recording a second moment when the current charging module is regulated to the test voltage; and calculating the unit voltage regulation duration of the current charging module according to the first moment, the second moment, the initial voltage and the test voltage.
Optionally, calculating a target time at which all the charging modules output the target voltage simultaneously and a starting time at which each charging module starts voltage regulation according to the target voltage and the unit voltage regulation duration of each charging module, includes: acquiring the target voltage regulating time of each charging module according to the target voltage and the unit voltage regulating time of each charging module; and calculating the target time of outputting the target voltage by all the charging modules simultaneously according to the target voltage regulating time length and the current time of each charging module.
Optionally, calculating a target time at which all the charging modules output the target voltage simultaneously according to the target voltage regulation duration and the current time of each charging module, including: acquiring the maximum voltage regulating time length and the current time in all target voltage regulating time lengths; and obtaining the target time at which the charging module simultaneously outputs the target voltage according to the current time and the maximum voltage regulation time.
Optionally, calculating a target time at which all the charging modules output the target voltage simultaneously and a starting time at which each charging module starts voltage regulation according to the target voltage and the unit voltage regulation duration of each charging module, further comprising: and subtracting the target voltage regulating duration of each charging module from the target time to obtain the starting time of starting voltage regulation of each charging module.
In a second aspect, the present invention provides a charging control device applied to a charging control system, the charging control device including: the acquisition module is used for acquiring the unit voltage regulation duration of each charging module; the calculation module is used for calculating the target time when all the charging modules output the target voltage simultaneously and the starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module; the sending module is used for sending a voltage regulating instruction to the corresponding charging module at the starting moment of starting voltage regulation of each charging module so that each charging module carries out voltage regulation according to the voltage regulating instruction; and the control module is used for controlling the switch module to be closed at the target moment so that the plurality of charging modules simultaneously output target voltages at the target moment.
Optionally, the obtaining module includes: the initial voltage control module is used for controlling the current charging module to output initial voltage; the test instruction sending module is used for sending a test instruction to the current charging module and recording the first moment of sending the test instruction, so that the current charging module carries out voltage regulation according to the test voltage in the test instruction; the recording module is used for recording a second moment when the current charging module is regulated to the test voltage when the current charging module is detected to be regulated to the test voltage; and the unit voltage regulation duration calculation module is used for calculating the unit voltage regulation duration of the current charging module according to the first moment, the second moment, the initial voltage and the test voltage.
Optionally, the calculation module comprises: the target voltage regulation duration acquisition module is used for acquiring the target voltage regulation duration of each charging module according to the target voltage and the unit voltage regulation duration of each charging module; and the target time calculation module is used for calculating the target time at which all the charging modules output the target voltage simultaneously according to the target voltage regulation duration and the current time of each charging module.
In a third aspect, the present invention provides a charging control system, comprising: the charging system comprises a charging controller, a switch module and a plurality of charging modules; the input ends of the charging modules are connected with an external alternating current power supply when in use, and the output ends of the charging modules are connected in parallel on a direct current bus and used for converting the external alternating current power supply into a target direct current power supply to charge an external battery; the charging controller is in communication connection with the plurality of charging modules and the switch module, is connected with an external battery management system when in use, is used for calculating a target time when all the charging modules output target voltages simultaneously and a starting time when each charging module starts voltage regulation according to target voltages sent by the external battery management system and unit voltage regulation duration of each charging module, and is also used for sending a voltage regulation instruction to the corresponding charging module at the starting time when each charging module starts voltage regulation so that each charging module performs voltage regulation according to the voltage regulation instruction; and the control module is also used for controlling the switch module to be closed at the target moment so that the plurality of charging modules output target voltages at the target moment simultaneously.
Optionally, the control end of the switch module is connected to the charge controller, the first end of the switch module is connected to the positive end of the dc bus, and the second end of the switch module is connected to the negative end of the dc bus, and is configured to close according to a control signal output by the charge controller, so that the dc bus outputs the target voltage to charge an external battery.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts an active voltage balance technology, firstly detects the unit voltage regulation duration of each charging module, then predicts the output time of the target voltage according to the target voltage and the unit voltage regulation duration, and calculates the voltage regulation starting time of each charging module according to the output time, thereby controlling the output time of the target voltage of each charging module and enabling each charging module to synchronously output the target voltage. Compared with the prior art, the charging control method has the advantages of high charging voltage regulation speed, stable charging current, small text wave, less high-frequency component, capability of effectively reducing the charging time and improving the charging efficiency, and solves the problem of poor voltage following performance of a charging module in the prior art, so that the change rate of the charging current in unit time is reduced, the impact on the BMS is reduced, the service life of the battery is prolonged, the electromagnetic interference emission is reduced, and the BMS fault rate is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of a charging control system according to the prior art;
fig. 2 is a schematic structural diagram of a charging control system according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a charging control method according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of step S101 in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Like numbered functional units in the examples of the present invention have the same and similar structure and function.
Fig. 1 is a schematic structural diagram of a charging control system in the prior art, wherein the direct current outputs of N charging modules are connected to a direct current bus DC + and DC-, and the charging modules communicate with a charging controller through a CAN bus. The output voltage of each charging module is V n Output current is I n Bus voltage of V d The output current of the bus is I d From kirchhoff's law:
V d ＝V 1 ＝V 2 ＝…＝V n
when a Battery Management System (BMS) of the electric vehicle sends a new voltage instruction to the charging controller, the charging controller simultaneously sends a new voltage instruction to the N charging modulesA voltage regulation instruction; due to the difference of the charging modules and the different voltage regulation time of each charging module, the voltage regulation time of the charging module n is set as t n . So that each charging module reaches the output voltage V d The charging current output ripple is caused, and in this case, the charging current ripple output voltage is increased in a step-like manner, which brings about the disadvantages that the charging efficiency is decreased and the battery life is reduced. In order to avoid the situation, the invention adopts a method for independently controlling the charging voltage time to realize the synchronization of the voltage regulating time.
In a first aspect, the present invention provides a charging control system, which specifically includes the following embodiments:
example one
Fig. 2 is a schematic structural diagram of a charging control system according to an embodiment of the present invention, and as shown in fig. 2, the charging control system according to the embodiment specifically includes:
the charging system comprises a charging controller, a switch module and a plurality of charging modules;
the input ends of the charging modules are connected with an external alternating current power supply when in use, and the output ends of the charging modules are connected in parallel to a direct current bus and used for converting the external alternating current power supply into a target direct current power supply to charge an external battery;
the charging controller is in communication connection with the plurality of charging modules and the switch module, is connected with an external battery management system when in use, is used for calculating a target time when all the charging modules output target voltages simultaneously and a starting time when each charging module starts voltage regulation according to target voltages sent by the external battery management system and unit voltage regulation duration of each charging module, and is also used for sending a voltage regulation instruction to the corresponding charging module at the starting time when each charging module starts voltage regulation so that each charging module performs voltage regulation according to the voltage regulation instruction; and the control module is also used for controlling the switch module to be closed at the target moment so that the plurality of charging modules output target voltage at the target moment simultaneously.
In this embodiment, the control end of the switch module is connected to the charge controller, the first end of the switch module is connected to the positive end of the dc bus, and the second end of the switch module is connected to the negative end of the dc bus, and is configured to close according to the control signal output by the charge controller, so that the dc bus outputs the target voltage to charge the external battery.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts an active voltage balance technology, firstly detects the unit voltage regulation duration of each charging module, then predicts the output time of the target voltage according to the target voltage and the unit voltage regulation duration, and calculates the voltage regulation starting time of each charging module according to the output time, thereby controlling the output time of the target voltage of each charging module and enabling each charging module to synchronously output the target voltage. Compared with the prior art, the charging control method has the advantages of high charging voltage regulation speed, stable charging current, small text wave, less high-frequency component, capability of effectively reducing the charging time and improving the charging efficiency, and solves the problem of poor voltage following performance of a charging module in the prior art, so that the change rate of the charging current in unit time is reduced, the impact on the BMS is reduced, the service life of the battery is prolonged, the electromagnetic interference emission is reduced, and the BMS fault rate is reduced.
In a second aspect, based on the charging control system, the present invention provides a charging control method, which specifically includes the following embodiments:
example two
Fig. 3 is a schematic flow chart of a charging control method according to an embodiment of the present invention, and as shown in fig. 3, the charging control method according to the embodiment is applied to a charging controller of a charging control system, where the charging control system further includes a switch module and a plurality of charging modules, and specifically includes the following steps:
step S101, acquiring unit voltage regulation duration of each charging module;
further, as shown in fig. 4, in step S101, obtaining a unit voltage regulation duration of each charging module specifically includes:
step S201, controlling the current charging module to output an initial voltage;
step S202, sending a test instruction to the current charging module and recording the first moment of sending the test instruction, so that the current charging module performs voltage regulation according to the test voltage in the test instruction;
step S203, detecting whether the current charging module is regulated to the test voltage, executing step S204 when detecting that the current charging module is regulated to the test voltage, and continuing to execute step S203 when detecting that the current charging module is not regulated to the test voltage;
step S204, recording a second moment when the current charging module regulates the voltage to the test voltage;
step S205, calculating unit voltage regulation duration of the current charging module according to the first time, the second time, the initial voltage and the test voltage.
It should be noted that, when the unit voltage regulation duration of the charging module is detected in this embodiment, the DC bus DC is no-load, the voltage outputs of all the charging modules except the currently detected charging module are turned off, and the initial voltage output by the currently detected charging module is turned on to be V 0 According to the GB/T18487 standard, V 0 The reference setting is 200V; the charging controller sends a test instruction to the current charging module to enable the output test voltage of the current charging module to be V 0 +10V, recording the time T for sending the test command by the charging controller 1 (ii) a The charging controller reads the output voltage V of the current charging module out If the output voltage does not reach V 0 +10V, repeatedly reading the output voltage of the current charging module; if the output voltage reaches V 0 When the +10V time reaches the record output voltage V 0 Time T of +10V 2 Calculating the unit voltage regulation time of the current charging module as follows: t is t n ＝(T 2 -T 1 ) 10, unit (S/V).
Step S102, calculating a target time when all charging modules output the target voltage simultaneously and a starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module;
specifically, calculating a target time at which all the charging modules simultaneously output the target voltage and a starting time at which each charging module starts voltage regulation according to the target voltage and the unit voltage regulation duration of each charging module includes: acquiring the target voltage regulating time of each charging module according to the target voltage and the unit voltage regulating time of each charging module; and calculating the target time of outputting the target voltage by all the charging modules simultaneously according to the target voltage regulating time length and the current time of each charging module.
It should be noted that, when the battery is charged through this embodiment, the charging controller receives a target voltage sent by the battery management system of the electric vehicle, and the controller calculates a target voltage regulation duration of each charging module according to the received target voltage and a voltage regulation duration of each charging module, for example, an initial voltage of a current charging module is 200V, an output target voltage is 300V, and a unit voltage regulation duration of the current charging module is 0.1S, so that the target voltage regulation duration of the current charging module is: (300-.
Wherein, the maximum voltage regulating time t in all the target voltage regulating time is obtained max And the current time T 0 Then, the target time at which all the charging modules simultaneously output the target voltage is: t is m ＝T 0 +t max Meaning the current time T 0 Plus the maximum voltage regulation duration t max The target time is obtained.
Further, according to the target voltage and the unit voltage regulation duration of each charging module, calculating a target time at which all the charging modules output the target voltage simultaneously and a starting time at which each charging module starts voltage regulation, and further comprising: and subtracting the target voltage regulating duration of each charging module from the target time to obtain the starting time of starting voltage regulation of each charging module.
The target time T is set m The target voltage regulation duration of each charging module is subtracted to obtain the starting time of voltage regulation starting of each charging module, for example,the target time is 11 hours, 30 minutes and 45 seconds, the voltage regulation time of the charging module 1 is 10 seconds, the voltage regulation time of the charging module 2 is 15 seconds, the starting time of the voltage regulation starting of the charging module 1 is 11 hours, 30 minutes and 35 seconds, the starting time of the voltage regulation starting of the charging module 2 is 11 hours, 30 minutes and 30 seconds, and the calculation method of the starting time of the voltage regulation starting of all the charging modules is described in the above embodiments, and is not repeated here.
Step S103, sending a voltage regulating instruction to a corresponding charging module at the starting moment of starting voltage regulation of each charging module, so that each charging module carries out voltage regulation according to the voltage regulating instruction;
specifically, the charging controller sends a voltage regulation instruction including a target voltage to the corresponding charging module at a corresponding time according to a starting time when each charging module starts voltage regulation, so that each charging module performs voltage regulation according to the target voltage.
And step S104, controlling the switch modules to be closed at the target moment, so that the plurality of charging modules output target voltages at the target moment simultaneously.
It should be noted that, at the target time, the charging controller controls the switch modules to be closed, so that each charging module simultaneously outputs a target voltage at the target time to charge the battery.
The invention adopts an active voltage balance technology, firstly detects the unit voltage regulation duration of each charging module, then predicts the output time of the target voltage according to the target voltage and the unit voltage regulation duration, and calculates the voltage regulation starting time of each charging module according to the output time, thereby controlling the output time of the target voltage of each charging module and enabling each charging module to synchronously output the target voltage. Compared with the prior art, the method has the advantages of high charging voltage regulation speed, stable charging current, small text wave, less high-frequency component, capability of effectively reducing charging time and improving charging efficiency, and solves the problem of poor voltage following performance of a charging module in the prior art of battery charging control, so that the change rate of charging current in unit time is reduced, the impact on the BMS is reduced, the service life of the battery is prolonged, the electromagnetic interference emission is reduced, and the BMS fault rate is reduced.
Based on the charging control system provided by the above embodiment, the present invention further provides a charging control method, which specifically includes:
firstly, establishing a data table in the charging controller for storing unit voltage regulation duration of each charging module;
secondly, establishing time synchronization with a charging module;
thirdly, detecting the voltage regulating time t of the charging module n And recording the time length table of the pressure regulation;
fourthly, connecting the charging gun to start charging, and calculating the starting voltage regulation time T of each charging module when the charging controller receives a voltage regulation instruction sn ；
Fifthly, sending a voltage regulating instruction and a voltage regulating time T to the charging module n sn ；
Sixthly, repeating the fifth step to guide all the N +1 charging modules to receive the instruction;
and seventhly, synchronously outputting the voltage by each charging module according to the voltage regulating time and the voltage regulating voltage.
In the present embodiment, the specific steps of detecting the voltage regulation duration of the charging module are as follows:
firstly, a direct current bus DC is unloaded;
step two, closing the voltage output of all the charging modules;
thirdly, setting n to be 0;
fourthly, the charging module n is started to output voltage V n According to the GB/T18487 standard, V n The reference setting is 200V;
fifthly, the charging controller outputs a voltage V to the charging module n n +10V, record the transmission time T 1 ；
Sixthly, reading the output voltage V of the charging module n out If the output voltage reaches V n +10V, performing the next step, otherwise, repeatedly reading the output voltage of the charging module n;
step seven, recording that the output voltage reaches V n Time T of +10V 2 ；
Eighth, calculating t n ＝(T 2 -T 1 ) 10, unit (S/V);
step nine, closing the charging module n;
step ten, starting the charging module n +1, jumping to the step four to the step nine, and repeating the steps four to nine until the voltage regulation time of all the charging modules is calculated;
eleventh, recording the voltage regulation time t of all the charging modules n And finishing the voltage regulation time recording of the charging module.
In this embodiment, the specific steps of calculating the voltage regulation time are as follows:
firstly, inquiring the maximum value t of the voltage regulating time of all the charging modules max ；
Second, time T of sending charging instruction 11 T of receiving an acknowledgement 12 Calculating the interaction duration t c ＝T 12 -T 11 ；
Thirdly, calculating the voltage regulating time T of the charging module n sn ＝(N-n)+t max -t n ，n＝0～N。
In a third aspect, the present invention provides a charging control device applied to a charging control system, where the charging control system includes a switch module and a plurality of charging modules, and the charging control device includes: the acquisition module is used for acquiring the unit voltage regulation duration of each charging module; the calculation module is used for calculating the target time when all the charging modules output the target voltage simultaneously and the starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module; the sending module is used for sending a voltage regulating instruction to the corresponding charging module at the starting moment of starting voltage regulation of each charging module so that each charging module carries out voltage regulation according to the voltage regulating instruction; and the control module is used for controlling the switch module to be closed at the target moment so that the plurality of charging modules simultaneously output target voltages at the target moment.
In an embodiment of the present invention, the obtaining module includes: the initial voltage control module is used for controlling the current charging module to output initial voltage; the test instruction sending module is used for sending a test instruction to the current charging module and recording the first moment of sending the test instruction, so that the current charging module performs voltage regulation according to the test voltage in the test instruction; the recording module is used for recording a second moment when the current charging module is regulated to the test voltage when the current charging module is detected to be regulated to the test voltage; and the unit voltage regulation duration calculation module is used for calculating the unit voltage regulation duration of the current charging module according to the first moment, the second moment, the initial voltage and the test voltage.
In an embodiment of the invention, the calculation module comprises: the target voltage regulation duration acquisition module is used for acquiring the target voltage regulation duration of each charging module according to the target voltage and the unit voltage regulation duration of each charging module; and the target time calculation module is used for calculating the target time at which all the charging modules output the target voltage simultaneously according to the target voltage regulation duration and the current time of each charging module.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A charging control method is applied to a charging controller of a charging control system, the charging control system further comprises a switch module and a plurality of charging modules, and the control method comprises the following steps:
acquiring unit voltage regulation duration of each charging module;
calculating a target time when all the charging modules output the target voltage simultaneously and a starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module;
sending a voltage regulating instruction to the corresponding charging module at the starting moment of starting voltage regulation of each charging module, so that each charging module carries out voltage regulation according to the voltage regulating instruction;
and controlling the switch modules to be closed at the target moment, so that the plurality of charging modules simultaneously output target voltages at the target moment.
2. The charge control method according to claim 1, wherein the obtaining a unit voltage regulation time length of each charging module comprises:
controlling the current charging module to output an initial voltage;
sending a test instruction to the current charging module and recording a first moment of sending the test instruction, so that the current charging module performs voltage regulation according to the test voltage in the test instruction;
when the current charging module is detected to be regulated to the test voltage, recording a second moment when the current charging module is regulated to the test voltage;
and calculating the unit voltage regulation duration of the current charging module according to the first moment, the second moment, the initial voltage and the test voltage.
3. The charge control method according to claim 1, wherein calculating a target time at which all the charging modules output the target voltage simultaneously and a start time at which each of the charging modules starts voltage regulation according to the target voltage and the unit voltage regulation time length of each of the charging modules comprises:
acquiring the target voltage regulating time of each charging module according to the target voltage and the unit voltage regulating time of each charging module;
and calculating the target time of outputting the target voltage by all the charging modules simultaneously according to the target voltage regulating time length and the current time of each charging module.
4. The charge control method according to claim 3, wherein calculating a target time at which all the charging modules simultaneously output the target voltage according to the target voltage regulation time and the current time of each charging module comprises:
acquiring the maximum voltage regulating time length and the current time in all target voltage regulating time lengths;
and obtaining the target time at which the charging module simultaneously outputs the target voltage according to the current time and the maximum voltage regulation time.
5. The charge control method according to claim 3, wherein a target time at which all the charging modules output the target voltage at the same time and a start time at which each of the charging modules starts voltage regulation are calculated based on the target voltage and the unit voltage regulation time length of each of the charging modules, further comprising:
and subtracting the target voltage regulating duration of each charging module from the target time to obtain the starting time of starting voltage regulation of each charging module.
6. The utility model provides a charging control device which characterized in that is applied to charging control system, charging control system includes switch module and a plurality of module of charging, controlling means includes:
the acquisition module is used for acquiring the unit voltage regulation duration of each charging module;
the calculation module is used for calculating the target time when all the charging modules output the target voltage simultaneously and the starting time when each charging module starts to regulate the voltage according to the target voltage and the unit voltage regulation duration of each charging module;
the sending module is used for sending a voltage regulating instruction to the corresponding charging module at the starting moment of starting voltage regulation of each charging module so that each charging module carries out voltage regulation according to the voltage regulating instruction;
and the control module is used for controlling the switch module to be closed at the target moment so that the plurality of charging modules simultaneously output target voltages at the target moment.
7. The charge control device according to claim 6, wherein the acquisition module includes:
the initial voltage control module is used for controlling the current charging module to output initial voltage;
the test instruction sending module is used for sending a test instruction to the current charging module and recording the first moment of sending the test instruction, so that the current charging module carries out voltage regulation according to the test voltage in the test instruction;
the recording module is used for recording a second moment when the current charging module is regulated to the test voltage when the current charging module is detected to be regulated to the test voltage;
and the unit voltage regulation duration calculation module is used for calculating the unit voltage regulation duration of the current charging module according to the first moment, the second moment, the initial voltage and the test voltage.
8. The charge control device of claim 7, wherein the calculation module comprises:
the target voltage regulation duration acquisition module is used for acquiring the target voltage regulation duration of each charging module according to the target voltage and the unit voltage regulation duration of each charging module;
and the target time calculation module is used for calculating the target time at which all the charging modules output the target voltage simultaneously according to the target voltage regulation duration and the current time of each charging module.
9. A charging control system, characterized in that the control system comprises:
the charging system comprises a charging controller, a switch module and a plurality of charging modules;
the input ends of the charging modules are connected with an external alternating current power supply when in use, and the output ends of the charging modules are connected in parallel on a direct current bus and used for converting the external alternating current power supply into a target direct current power supply to charge an external battery;
the charging controller is in communication connection with the plurality of charging modules and the switch module, is connected with an external battery management system when in use, is used for calculating a target time when all the charging modules output target voltages simultaneously and a starting time when each charging module starts voltage regulation according to target voltages sent by the external battery management system and unit voltage regulation duration of each charging module, and is also used for sending a voltage regulation instruction to the corresponding charging module at the starting time when each charging module starts voltage regulation so that each charging module performs voltage regulation according to the voltage regulation instruction; and the control module is also used for controlling the switch module to be closed at the target moment so that the plurality of charging modules output target voltages at the target moment simultaneously.
10. The charging control system according to claim 9, wherein the control terminal of the switch module is connected to the charging controller, the first terminal of the switch module is connected to the positive terminal of the dc bus, and the second terminal of the switch module is connected to the negative terminal of the dc bus, so as to close the switch module according to the control signal output by the charging controller, so that the dc bus outputs the target voltage to charge an external battery.
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