CN114938079A - Charging and discharging control method, device and system and storage medium - Google Patents

Charging and discharging control method, device and system and storage medium Download PDF

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Publication number
CN114938079A
CN114938079A CN202210602414.6A CN202210602414A CN114938079A CN 114938079 A CN114938079 A CN 114938079A CN 202210602414 A CN202210602414 A CN 202210602414A CN 114938079 A CN114938079 A CN 114938079A
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Prior art keywords
target vehicle
charge
secondary side
charging
transmission power
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CN202210602414.6A
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Chinese (zh)
Inventor
赵立鑫
董宗祥
史青松
刘春芳
李明
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SAIC General Motors Corp Ltd
Pan Asia Technical Automotive Center Co Ltd
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SAIC General Motors Corp Ltd
Pan Asia Technical Automotive Center Co Ltd
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Priority to CN202210602414.6A priority Critical patent/CN114938079A/en
Publication of CN114938079A publication Critical patent/CN114938079A/en
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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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • 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
    • B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The application discloses a charging and discharging control method, a charging and discharging control device, a charging and discharging control system and a storage medium, which are used for simplifying the structure of a wireless charging device and reducing the cost. The method comprises the following steps: acquiring a charge-discharge mode of a target vehicle; adjusting the overlap angle of the driving signals of the original secondary side converter by controlling the driving signals of the target vehicle converter to enable the transmission power between the original secondary side and the original secondary side to be matched with the charging and discharging mode; and adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach a desired value. By adopting the scheme provided by the application, the power transmission can be realized by controlling the overlap angle and the voltage duty ratio of the driving signal on one side of the target vehicle, and a communication module or an independent detection unit is not required to be additionally added, so that the structure of the wireless charging device is simplified, and the cost is reduced.

Description

Charging and discharging control method, device and system and storage medium
Technical Field
The present disclosure relates to the field of wireless charging technologies, and in particular, to a charging and discharging control method, device, system, and storage medium.
Background
With the development of wireless charging technology becoming mature and the rapid development of V2G (Vehicle to Grid) and smart Grid, the bidirectional wireless power transmission technology makes it possible for an electric Vehicle to transmit power to another Vehicle through a power Grid and supply power to a household power Grid.
The traditional wireless power transmission system is often matched bilaterally by adding an additional communication module or an independent detection unit, and has the problems of complex structure, overhigh cost and the like.
Disclosure of Invention
The application provides a charging and discharging control method, a charging and discharging control device, a charging and discharging control system and a storage medium, which are used for simplifying the structure of a wireless charging device and reducing the cost.
The application provides a charge and discharge control method, which comprises the following steps:
acquiring a charge-discharge mode of a target vehicle;
adjusting the overlap angle of the driving signals of the original secondary side converter by controlling the driving signals of the target vehicle converter to enable the transmission power between the original secondary side and the original secondary side to be matched with the charging and discharging mode;
and adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach a desired value.
The beneficial effect of this application lies in: the power transmission can be realized by controlling the overlap angle and the voltage duty ratio of the driving signal on one side of the target vehicle without additionally adding a communication module or an independent detection unit, so that the structure of the wireless charging device is simplified, and the cost is reduced.
In one embodiment, the adjusting of the overlap angle of the primary and secondary inverter drive signals by controlling the drive signal of the target vehicle inverter comprises:
the overlap angle of the original secondary side converter driving signal is changed by controlling the triggering time of the converter driving signal in the target vehicle in each clock cycle.
In one embodiment, the adjusting the overlap angle of the primary-secondary converter driving signal by controlling the driving signal of the target vehicle converter so that the transmission power between the primary and secondary sides matches the charge-discharge mode includes:
and when the charge-discharge mode of the target vehicle is the charge mode, the overlap angle of the driving signal of the original secondary side converter is adjusted to enable the secondary side sending power to be smaller than 0 and to reach the maximum absolute value.
In one embodiment, the adjusting the overlap angle of the primary and secondary inverter driving signals by controlling the driving signal of the target vehicle inverter so that the transmission power between the primary and secondary sides matches the charge and discharge pattern includes:
and when the charge-discharge mode of the target vehicle is the discharge mode, the overlap angle of the driving signal of the original secondary side converter is adjusted to enable the secondary side transmitting power to be larger than 0 and to reach the maximum absolute value.
In one embodiment, the adjusting the duty cycle of the target vehicle output voltage to make the transmission power between the primary side and the secondary side reach a desired value includes:
acquiring a maximum transmission power interval in the charging and discharging process of the target vehicle;
determining the maximum value of the maximum transmission power interval as an expected value of transmission power;
and adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach the maximum value of the transmission power interval.
In one embodiment, the method further comprises:
when the charging and discharging mode is the charging mode, detecting the current electric quantity of the target vehicle;
and when the current electric quantity of the target vehicle reaches the preset electric quantity, disconnecting the original secondary side.
In one embodiment, the obtaining of the charge-discharge mode of the target vehicle includes:
receiving a charge and discharge instruction of a target vehicle;
and determining the charge and discharge mode of the target vehicle according to the charge and discharge instruction of the target vehicle.
The present application also provides a charge and discharge control device, including:
the acquisition module is used for acquiring a charge and discharge mode of a target vehicle;
the control module is used for adjusting the overlap angle of the driving signals of the original secondary side converter by controlling the driving signals of the target vehicle converter so as to enable the transmission power between the original secondary side and the original secondary side to be matched with the charging and discharging mode;
and the adjusting module is used for adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach a desired value.
The present application further provides a charge and discharge control system, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the charging and discharging control method according to any one of the above embodiments.
The present application further provides a computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor corresponding to the charge and discharge control system, the charge and discharge control system is enabled to implement the charge and discharge control method described in any one of the embodiments.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present application is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart illustrating a charging/discharging control method according to an embodiment of the present disclosure;
fig. 2A is a schematic diagram illustrating an operating principle of a charging and discharging system according to an embodiment of the present disclosure;
FIG. 2B is a diagram illustrating an overlap angle α of the primary and secondary side converter driving signals according to an embodiment of the present application;
FIG. 2C shows the output voltage V of the primary side converter according to an embodiment of the present application a Duty cycle D 1 A schematic diagram of (a);
fig. 3 is a flowchart of a charging and discharging control method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a charge and discharge control device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a hardware structure of a charging and discharging control system according to an embodiment of the present application.
Detailed Description
The preferred embodiments of the present application will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein only to illustrate and explain the present application and not to limit the present application.
Fig. 1 is a flowchart of a charging and discharging control method according to an embodiment of the present application, and as shown in fig. 1, the method may be implemented as the following steps S101 to S103:
in step S101, a charge/discharge mode of the target vehicle is acquired;
in step S102, the overlap angle of the driving signal of the original secondary side converter is adjusted by controlling the driving signal of the target vehicle converter, so that the transmission power between the original secondary side and the charging and discharging mode is matched;
in step S103, the duty ratio of the target vehicle output voltage is adjusted so that the transmission power between the primary and secondary sides reaches a desired value.
To fully explain the present application, the principles of the present application are supplemented by:
FIG. 2A is a schematic diagram illustrating an operating principle of a charging and discharging system according to an embodiment of the present application, and as shown in FIG. 2A, a primary side includes a power supply V 1 The converter 1, the resonant network 1 and the control unit 1 are symmetrically structured on the secondary side. Taking the primary side as an example, the power supply V 1 The power supply can be a battery or a direct current power supply converted by other circuits; the converter 1 is a single-phase full bridge and is composed of a DC bus capacitor C z1 And 4 switching tubes S 11 ～S 14 The direct current bus capacitor is unnecessary, and 4 switch tubes can be connected with the capacitor in parallel to realize soft switching; the resonant network is composed of a resonant inductor L a Resonant capacitor C 1 And a compensation capacitor C a And an energy transmission coil L 1 Composition is carried out; the control unit 1 mainly collects and measures voltage and current signals of each branch of the converter and the resonant network, performs system logic control and outputs a driving signal gs of the switching tube 11 ～gs 14 Wherein gs is 11 And gs 14 Keep in synchronization, gs 12 And gs 13 Keep in synchronization, gs 11 And gs 12 Are in a complementary relationship. The derivation principle of the application is as follows:
as known from the prior art, in an ac circuit, there are often inductive and capacitive components. The inductive element is characterized by being connected with the direct current through resistance alternating current, and the capacitive element is characterized by being connected with the alternating current through resistance direct current. Mathematically, phase is generally described: the phases of the inductive element and the capacitive element are opposite, and the resistances of the inductive element and the capacitive element in the circuit are equal at a certain frequency, i.e. equal in magnitude and opposite in direction, and such a circuit is called a resonant circuit. Therefore, the resonance condition of the charge and discharge system is:
Figure BDA0003670153500000051
where ω is the resonant frequency, L a And L b Resonant inductances, C, of primary and secondary side, respectively 1 And C 2 Resonant inductances, L, of primary and secondary sides, respectively 1 And L 2 Primary and secondary energy transfer coils, respectively, C a And C b The compensation capacitors of the primary side and the secondary side are respectively.
The branch current of each part is as follows:
Figure BDA0003670153500000052
wherein M is mutual inductance and represents the coupling relation between the two coils; I.C. A 1 Is the primary coil current; I.C. A 2 Is the secondary side coil current; u shape a Is the output voltage of the primary side converter; u shape b Is the output voltage of the secondary converter; j is the imaginary sign.
From equation (2), it can be seen that the current I is seen to be for the primary winding 1 Is only dependent on the output voltage U of the converter at the corresponding side a Similarly, the secondary winding current I 2 Is only dependent on the output voltage U of the converter on the corresponding side b 。
FIG. 2B is a diagram of an overlap angle α of the primary and secondary side converter driving signals according to an embodiment of the present application, as shown in FIG. 2B, gs 11 、gs 21 Respectively an original secondary side switch tube S 11 、S 21 The overlap angle of the original secondary side converter driving signal is alpha (the overlap angle is alpha, alpha is more than or equal to 0 and less than or equal to pi), which means that when the original secondary side is in the same switching period T, the same logic switching tube S of the original secondary side is used for switching the tube S 11 And S 21 Switching signal gs 11 And gs 21 The high level overlap time therebetween accounts for the electrical angle of the switching period T. The available transmission power is:
Figure BDA0003670153500000061
wherein, P is active power; and Q is reactive power.
It can be seen from equation (3) that changing the magnitude and direction of power transfer can be achieved by changing the overlap angle α. In particular, when α ═ pi/2, the transmitted reactive power is zero and the active power is at a maximum.
Further, in FIG. 2A, V 112 For switching tubes S in converter 1 11 And S 21 Voltage between them with respect to the negative pole of the DC power supply, V 134 For switching tubes S in converter 1 13 And S 14 Relative to the negative pole of the dc power supply. FIG. 2C shows the output voltage V of the primary side converter according to an embodiment of the present application a Duty cycle D 1 As shown in FIG. 2C, V a Is composed of V 112 And V 134 Synthesized voltage waveform, definition V a The ratio of the time T1 that is high during the half period to the half period T/2 is the converter output voltage duty cycle D 1 (hereinafter referred to as duty ratio D) 1 ). Correspondingly, the secondary side corresponds to the converter output voltage V b And its duty cycle D 2 . The formula can be obtained according to Fourier series expansion:
Figure BDA0003670153500000062
wherein, V a The output voltage of the primary side converter; d 1 For the output voltage V of the primary converter a Duty cycle D 1 。
When n is 0, its fundamental component U a Comprises the following steps:
Figure BDA0003670153500000063
as can be seen from equation (5), by controlling the primary side duty cycle D 1 Namely, the output voltage U of the primary side converter can be controlled a Thereby realizing control of transmission power. Similarly, by controlling the duty ratio D of the primary side 2 Namely, the output voltage U of the primary side converter can be controlled b And realizing the control of the transmission power.
In conclusion, the original secondary duty ratio D can be controlled by changing the overlap angle alpha to control the power transmission size and direction 1 、D 2 Changeable voltage U a 、U b The amplitude value further changes the power transmission size, and the power bidirectional control of the charging and discharging system shown in fig. 2A is realized.
Based on the principle, the primary side controls U a When the current of the primary coil is constant at a specific amplitude, the overlap angles alpha and U are controlled by the secondary coil b The direction and the size control of the transmission power can be realized. Particularly, in the aspect of adjusting the overlap angle alpha, because the original secondary sides are relatively independent and cannot mutually detect the phase to determine the overlap angle, under the condition that the primary side keeps constant output, the secondary sides uniformly change the driving signal gs 21 Trigger time T (T) at each clock cycle T<T/2) enables control of the overlap angle α. And, according to the formula (3), it can be inferred that D is being maintained 1 、D 2 When t is changed such that the absolute value of P2 becomes maximum and the absolute value of Q2 becomes minimum, α ═ pi/2 without change.
Fig. 3 is a flowchart of a charging and discharging control method according to an embodiment of the present application, in fig. 3, the target vehicle is set as a secondary side, and as shown in fig. 3, when the method provided by the present application is implemented:
acquiring a charge-discharge mode of a target vehicle; specifically, before the reading operation mode, whether the secondary side coil induction power supply is stable or not is detected, and when the secondary side coil induction power supply is stable, the charging and discharging mode of the reading target vehicle is started. Receiving a charging and discharging instruction of a target vehicle, wherein the instruction can be a charging or discharging instruction input by a user; and determining a charge and discharge mode of the target vehicle according to the charge and discharge command of the target vehicle, wherein the mode A is a charge mode, and the mode B is a discharge mode, as shown in FIG. 3. It is understood that the charge and discharge mode obtaining manner may be further implemented as: when the original secondary side connection is detected, the residual electric quantity of the target vehicle is obtained, and when the residual electric quantity of the target vehicle is smaller than a specific value, the charging and discharging mode is automatically determined to be the charging mode.
Adjusting the overlap angle of the driving signal of the original secondary side converter by controlling the driving signal of the target vehicle converter, so that the transmission power between the original secondary side and the original secondary side is matched with the charge-discharge mode; because the power output directions are different due to different charging and discharging modes, the power transmission direction is matched with the charging and discharging modes by changing the overlap angle alpha. Moreover, as can be seen from fig. 2B, the overlap angle α of the original secondary-side inverter driving signal can be changed by controlling the trigger time of the inverter driving signal in the target vehicle in each clock cycle, so as to control the direction and magnitude of the power output. Specifically, when the charge-discharge mode of the target vehicle is the charge mode, the secondary side can send out P by adjusting the overlap angle of the driving signal of the primary-secondary side converter 2 The power is less than 0 and reaches the absolute value maximum, that is, the target vehicle is caused to receive the power, and the received power is caused to reach the maximum value. When the charging and discharging mode of the target vehicle is the discharging mode, the overlap angle of the driving signals of the original secondary side converter is adjusted to enable the secondary side to send out power P 2 Greater than 0 and reaches the absolute value maximum, that is, the target vehicle is made to output power, and the output power is made to reach the maximum value.
And adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach a desired value. As can be seen from equation (3), D is maintained 1 、D 2 Regulating alpha to make output power P unchanged 2 The time when the absolute value is maximum is the time when the transmission efficiency is highest under the current transmission condition. When alpha is determined, adjust D 2 The transmission power level may be changed. In order to speed up the power transfer, it is desirable that the vehicle be able to operate at maximum power transfer. Therefore, the maximum transmission power interval in the charging and discharging process of the target vehicle is obtained, and it can be understood that the power interval may also be a fixed value preset by the vehicle or a power interval known according to historical data; determining the maximum value of the maximum transmission power interval as an expected value of the transmission power, and adjusting the transmission power to the maximum power which can be reached by the vehicle as much as possible in the transmission process; marking vehicle by adjusting programsAnd the duty ratio of the output voltage enables the transmission power between the primary side and the secondary side to reach the maximum value of the transmission power interval.
In the present application, a function of automatically stopping charging is provided in order to protect the charging/discharging device. When the charging and discharging mode is the charging mode, detecting the current electric quantity of the target vehicle; and when the current electric quantity of the target vehicle reaches the preset electric quantity, disconnecting the original secondary side. Similarly, when the charging and discharging mode is the discharging mode, detecting the current electric quantity of the target vehicle; and when the current electric quantity of the target vehicle is larger than a preset threshold value and the discharging electric quantity reaches a preset electric quantity, disconnecting the original secondary side.
The beneficial effect of this application lies in: the power transmission can be realized by controlling the overlap angle and the voltage duty ratio of the driving signal on one side of the target vehicle without additionally adding a communication module or an independent detection unit, so that the structure of the wireless charging device is simplified, and the cost is reduced.
In one embodiment, the adjusting of the overlap angle of the driving signal of the primary-secondary converter by controlling the driving signal of the target vehicle converter in the step S102 may be implemented as the following steps:
the overlap angle of the original secondary side converter driving signal is changed by controlling the triggering time of the converter driving signal in the target vehicle in each clock cycle.
FIG. 2B is a diagram of an overlap angle α of the primary and secondary side converter driving signals according to an embodiment of the present application, as shown in FIG. 2B, gs 11 、gs 21 Are respectively an original secondary side switch tube S 11 、S 21 The overlap angle of the original secondary side converter driving signal is alpha (the overlap angle is alpha, alpha is more than or equal to 0 and less than or equal to pi), which means that when the original secondary side is in the same switching period T, the same logic switching tube S of the original secondary side is used for switching the tube S 11 And S 21 Switching signal gs 11 And gs 21 The high-level overlap time therebetween accounts for the electrical angle of the switching period T. As can be seen from FIG. 2B, the overlap angle α of the primary and secondary inverter driving signals can be changed by controlling the trigger time of the inverter driving signal in the target vehicle in each clock cycleAnd in turn, the direction and magnitude of the power output. And, the available transmission power is:
Figure BDA0003670153500000091
it can be seen from equation (3) that changing the magnitude and direction of power transfer can be achieved by changing the overlap angle α. In particular, when α ═ pi/2, the transmitted reactive power is zero and the active power is at a maximum.
In one embodiment, the step S102 may be implemented as the following steps:
and when the charge-discharge mode of the target vehicle is the charge mode, the overlap angle of the driving signal of the original secondary side converter is adjusted to enable the secondary side sending power to be smaller than 0 and to reach the maximum absolute value.
As shown in fig. 3, the mode a is a charging mode, and when the charging/discharging mode of the target vehicle is the charging mode, the secondary side can send out P by adjusting the overlap angle of the primary-secondary side converter driving signal 2 The power is less than 0 and reaches the absolute value maximum, that is, the target vehicle is caused to receive the power, and the received power is caused to reach the maximum value.
In one embodiment, the adjusting the overlap angle of the primary and secondary inverter driving signals by controlling the driving signal of the target vehicle inverter so that the transmission power between the primary and secondary sides matches the charge and discharge pattern includes:
and when the charge-discharge mode of the target vehicle is the discharge mode, the overlap angle of the driving signal of the original secondary side converter is adjusted to enable the secondary side transmitting power to be larger than 0 and to reach the maximum absolute value.
As shown in fig. 3, the mode B is a discharging mode, and when the charging/discharging mode of the target vehicle is the discharging mode, the secondary side sends out power P by adjusting the overlap angle of the primary and secondary side converter driving signals 2 Greater than 0 and reaches the absolute value maximum, that is, the target vehicle is made to output power, and the output power is made to reach the maximum value.
In one embodiment, the above step S103 may be implemented as the following steps A1-A3:
in step a1, acquiring a maximum transmission power interval of the target vehicle in the charging and discharging process;
in step a2, determining the maximum value of the maximum transmission power interval as the expected value of the transmission power;
in step a3, the duty ratio of the target vehicle output voltage is adjusted so that the transmission power between the primary and secondary sides reaches the maximum value of the transmission power interval.
In the present embodiment, in order to accelerate the transmission of power, it is desirable that the vehicle can operate at the maximum transmission power. Therefore, the maximum transmission power interval in the charging and discharging processes of the target vehicle is obtained, and it can be understood that the power interval may also be a fixed value preset by the vehicle, or may also be a power interval known according to historical data; determining the maximum value of the maximum transmission power interval as an expected value of transmission power, and adjusting the transmission power to the maximum power which can be reached by a vehicle as much as possible in the transmission process; and adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach the maximum value of the transmission power interval.
In one embodiment, the method further comprises the following steps B1-B2:
in step B1, when the charge-discharge mode is the charge mode, detecting a current electric quantity of the target vehicle;
in step B2, when the current electric quantity of the target vehicle reaches a preset electric quantity, the connection between the primary and secondary sides is disconnected.
In this embodiment, a function of automatically stopping charging is provided in order to protect the charging/discharging device. When the charging and discharging mode is the charging mode, detecting the current electric quantity of the target vehicle; and when the current electric quantity of the target vehicle reaches the preset electric quantity, disconnecting the original secondary side.
Further, when the charge-discharge mode is the discharge mode, detecting a current electric quantity and a discharged electric quantity of the target vehicle; when the current electric quantity of the target vehicle is larger than or equal to a preset threshold value and the discharge electric quantity reaches a preset electric quantity, disconnecting the original secondary side; and when the current electric quantity of the target vehicle is smaller than a preset threshold value, disconnecting the original secondary side.
In one embodiment, the above step S101 may be implemented as the following steps C1-C2:
in step C1, a charge/discharge command of the target vehicle is received;
in step C2, the charge/discharge mode of the target vehicle is determined based on the charge/discharge command of the target vehicle.
In the present embodiment, a charge-discharge mode of a target vehicle is acquired; specifically, a charging and discharging instruction of the target vehicle is received, and the instruction can be a charging or discharging instruction input by a user; and determining the charge and discharge mode of the target vehicle according to the charge and discharge instruction of the target vehicle.
It is understood that the charge and discharge mode obtaining manner may be further implemented as: when the original secondary side connection is detected, the residual electric quantity of the target vehicle is obtained, and when the residual electric quantity of the target vehicle is smaller than a specific value, the charging and discharging mode is automatically determined to be the charging mode.
Fig. 4 is a schematic structural diagram of a charge and discharge control device according to an embodiment of the present application, and as shown in fig. 4, the charge and discharge control device includes:
an obtaining module 401, configured to obtain a charge and discharge mode of a target vehicle;
a control module 402, configured to adjust an overlap angle of a driving signal of an original secondary-side converter by controlling a driving signal of a target vehicle converter, so that a transmission power between the original secondary side and the original secondary side matches the charge-discharge mode;
and a regulating module 403, configured to adjust a duty ratio of the target vehicle output voltage so that the transmission power between the primary side and the secondary side reaches a desired value.
Fig. 5 is a schematic diagram of a hardware structure of a charging and discharging control system in an embodiment of the present application, and as shown in fig. 5, the charging and discharging control system includes:
at least one processor 520; and the number of the first and second groups,
a memory 504 communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory 504 stores instructions executable by the at least one processor 520, and the instructions are executed by the at least one processor 520 to implement the charging and discharging control method according to any one of the above embodiments.
Referring to fig. 5, the charge and discharge control system 500 may include one or more of the following components: processing component 502, memory 504, power component 506, multimedia component 508, audio component 510, input/output (I/O) interface 512, sensor component 514, and communication component 516.
The processing component 502 generally controls the overall operation of the charge and discharge control system 500. The processing component 502 may include one or more processors 520 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 502 can include one or more modules that facilitate interaction between the processing component 502 and other components. For example, the processing component 502 can include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 502.
The memory 504 is configured to store various types of data to support the operation of the charge and discharge control system 500. Examples of such data include instructions for any application or method operating on charge and discharge control system 500, such as text, pictures, video, and so forth. The memory 504 may be implemented by any type or combination of volatile and non-volatile storage devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 506 provides power to the various components of the charging and discharging control system 500. Power components 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power supplies for in-vehicle control system 500.
The multimedia assembly 508 includes a screen providing an output interface between the charging and discharging control system 500 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 may also include a front facing camera and/or a rear facing camera. When the charging and discharging control system 500 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 510 is configured to output and/or input audio signals. For example, the audio component 510 includes a Microphone (MIC) configured to receive an external audio signal when the charge and discharge control system 500 is in an operation mode, such as an alarm mode, a recording mode, a voice recognition mode, and a voice output mode. The received audio signal may further be stored in the memory 504 or transmitted via the communication component 516. In some embodiments, audio component 510 further includes a speaker for outputting audio signals.
The I/O interface 512 provides an interface between the processing component 502 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 514 includes one or more sensors for providing various aspects of state estimation for the charging and discharging control system 500. For example, the sensor assembly 514 may include an acoustic sensor. In addition, the sensor assembly 514 may detect an open/closed state of the charge and discharge control system 500, a relative positioning of the components, such as a display and a keypad of the charge and discharge control system 500, an operational state of the charge and discharge control system 500 or a component of the charge and discharge control system 500, such as an operational state of a wind distribution plate, a structural state, an operational state of a discharge scraper, etc., an orientation or acceleration/deceleration of the charge and discharge control system 500, and a temperature change of the charge and discharge control system 500. The sensor assembly 514 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, a material build-up thickness sensor, or a temperature sensor.
The communication component 516 is configured to enable the charging and discharging control system 500 to provide a wired or wireless communication capability with other devices and cloud platforms. The charging and discharging control system 500 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the charge and discharge control system 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements for performing the charge and discharge control method described in any of the above embodiments.
The present application further provides a computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor corresponding to the charge and discharge control system, the charge and discharge control system is enabled to implement the charge and discharge control method described in any one of the embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A charge and discharge control method is characterized by comprising the following steps:
acquiring a charge-discharge mode of a target vehicle;
adjusting the overlap angle of the driving signals of the original secondary side converter by controlling the driving signals of the target vehicle converter to enable the transmission power between the original secondary side and the original secondary side to be matched with the charging and discharging mode;
and adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach a desired value.
2. The method of claim 1, wherein said adjusting the overlap angle of the primary and secondary inverter drive signals by controlling the drive signal of the target vehicle inverter comprises:
the overlap angle of the original secondary side converter driving signal is changed by controlling the triggering time of the converter driving signal in the target vehicle in each clock period.
3. The method of claim 1, wherein adjusting an overlap angle of primary and secondary inverter drive signals by controlling a drive signal of a target vehicle inverter such that a transmission power between primary and secondary matches the charge-discharge pattern comprises:
and when the charge-discharge mode of the target vehicle is a charge mode, adjusting the overlap angle of the driving signal of the original secondary converter to enable the secondary sending power to be less than 0 and reach the maximum absolute value.
4. The method of claim 1, wherein adjusting an overlap angle of primary and secondary inverter drive signals by controlling a drive signal of a target vehicle inverter such that a transmission power between primary and secondary matches the charge-discharge pattern comprises:
and when the charge-discharge mode of the target vehicle is the discharge mode, the overlap angle of the driving signal of the original secondary side converter is adjusted to enable the secondary side transmitting power to be larger than 0 and to reach the maximum absolute value.
5. The method of claim 1, wherein adjusting the duty cycle of the target vehicle output voltage to cause the transmitted power between the primary and secondary sides to reach a desired value comprises:
acquiring a maximum transmission power interval in the charging and discharging process of the target vehicle;
determining the maximum value of the maximum transmission power interval as an expected value of transmission power;
and adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach the maximum value of the transmission power interval.
6. The method of claim 1, wherein the method further comprises:
when the charging and discharging mode is the charging mode, detecting the current electric quantity of the target vehicle;
and when the current electric quantity of the target vehicle reaches the preset electric quantity, disconnecting the original secondary side.
7. The method of claim 1, wherein the obtaining the charge-discharge mode of the target vehicle comprises:
receiving a charge and discharge instruction of a target vehicle;
and determining the charge and discharge mode of the target vehicle according to the charge and discharge instruction of the target vehicle.
8. A charge and discharge control device, comprising:
the acquisition module is used for acquiring a charge and discharge mode of a target vehicle;
the control module is used for adjusting the overlap angle of the driving signals of the original secondary side converter by controlling the driving signals of the target vehicle converter so as to enable the transmission power between the original secondary side and the original secondary side to be matched with the charging and discharging mode;
and the adjusting module is used for adjusting the duty ratio of the output voltage of the target vehicle to enable the transmission power between the primary side and the secondary side to reach a desired value.
9. A charge-discharge control system, characterized by comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to implement the charge and discharge control method according to any one of claims 1 to 7.
10. A computer-readable storage medium, wherein instructions in the storage medium, when executed by a corresponding processor of a charge and discharge control system, enable the charge and discharge control system to implement the charge and discharge control method according to any one of claims 1 to 7.
CN202210602414.6A 2022-05-30 2022-05-30 Charging and discharging control method, device and system and storage medium Pending CN114938079A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116365886A (en) * 2023-03-10 2023-06-30 深圳麦格米特电气股份有限公司 Bidirectional DC/DC converter and energy storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116365886A (en) * 2023-03-10 2023-06-30 深圳麦格米特电气股份有限公司 Bidirectional DC/DC converter and energy storage device
CN116365886B (en) * 2023-03-10 2024-04-12 深圳麦格米特电气股份有限公司 Bidirectional DC/DC converter and energy storage device

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