CN220359026U - Driving circuit of power conversion circuit, power conversion circuit and energy storage device - Google Patents
Driving circuit of power conversion circuit, power conversion circuit and energy storage device Download PDFInfo
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- CN220359026U CN220359026U CN202321536442.9U CN202321536442U CN220359026U CN 220359026 U CN220359026 U CN 220359026U CN 202321536442 U CN202321536442 U CN 202321536442U CN 220359026 U CN220359026 U CN 220359026U
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Abstract
The application provides a drive circuit of power conversion circuit, power conversion circuit and energy storage equipment, this power conversion circuit includes first bridge type module, and first bridge type module includes first bridge arm and second bridge arm, and first bridge arm and second bridge arm all are provided with two switching units of establishing ties, and each switching unit includes two at least parallel switching tubes. The driving circuit comprises a control module and at least two driving modules; the control module is respectively connected with each driving module, and each switching tube in each switching unit is independently driven by different driving modules. The control module is used for controlling the driving module to control the working state of the first bridge module. The driving circuit can reduce the circuit loss of the power conversion circuit.
Description
Technical Field
The application relates to the technical field of power conversion, in particular to a driving circuit of a power conversion circuit, the power conversion circuit and energy storage equipment.
Background
The power conversion circuit functions to convert the direct current or alternating current of a power source into an electrical energy output having a different voltage, current or frequency. Power conversion circuits are commonly used to drive a variety of electrical devices, and may be used in the fields of home, automotive, etc., such as lighting, motors, heating, and electronics. Therefore, the power conversion circuit has an important meaning for improving the performance of the electrical device. However, the control logic of the conventional power conversion circuit is relatively simple, resulting in relatively large circuit losses.
Disclosure of Invention
The main purpose of the application is to provide a driving circuit, a power conversion circuit and energy storage equipment of a power conversion circuit, and aims to solve the problem that the control logic of the traditional power conversion circuit is simpler, so that the circuit loss is larger.
In a first aspect, the present application provides a driving circuit of a power conversion circuit, where the power conversion circuit includes a first bridge module, the first bridge module includes a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are both provided with two switching units connected in series; each switching unit comprises at least two switching tubes connected in parallel;
the driving circuit comprises a control module and at least two driving modules; the control module is respectively connected with the driving modules, and each switching tube in each switching unit is independently driven by different driving modules; the control module is used for controlling the driving module to control the working state of the first bridge module.
In an embodiment, the control module is further configured to determine a first target operating state of each of the switching units and a second target operating state of each of the switching tubes in each of the switching units according to the output power of the power conversion circuit; the control module is also used for outputting a driving signal to the driving module according to the first target working state and the second target working state;
the driving module is used for outputting a control signal to the connected switching tube according to the driving signal, and the control signal is used for controlling the switching tube to be turned on or turned off.
In an embodiment, the driving circuit includes a first driving module and a second driving module, and each of the switching units includes a first switching tube and a second switching tube; the input end of the first driving module is connected with the first output end of the control module, and the output end of the first driving module is respectively connected with a first switching tube in each switching unit; the input end of the second driving module is connected with the second output end of the control module, and the output end of the second driving module is respectively connected with a second switching tube in each switching unit;
the control module is further configured to output a first driving signal to the first driving module when the output power of the power conversion circuit is less than or equal to a first preset power threshold; the first driving module is used for outputting a first control signal to a first switching tube in each switching unit according to the first driving signal, and the first control signal is used for controlling the first switching tube to work;
the control module is further configured to output a second driving signal to the second driving module when the output power of the power conversion circuit increases to be greater than the first preset power threshold; the second driving module is used for outputting a second control signal to a second switching tube in each switching unit according to the second driving signal, and the second control signal is used for controlling the second switching tube to work.
In an embodiment, the driving circuit includes a third driving module, a fourth driving module and a fifth driving module, and each of the switching units includes a first switching tube and a second switching tube;
the input end of the third driving module is connected with the first output end of the control module, and the output end of the third driving module is respectively connected with a first switching tube in each switching unit;
the input end of the fourth driving module is connected with the second output end of the control module, and the output end of the fourth driving module is connected with two second switching tubes; the input end of the fifth driving module is connected with the third output end of the control module, and the output ends of the fifth driving module are respectively connected with the other two second switching tubes; and the two second switching tubes connected with the fourth driving module and the fifth driving module are positioned in different switching units.
In an embodiment, the number of the switching tubes connected in parallel in each switching unit is a plurality, and the number of the driving modules is the same as the number of the switching tubes in the switching unit.
In one embodiment, the control module comprises a DSP chip and the drive module comprises an isolated drive chip.
In an embodiment, the driving circuit further includes a power collection module, where the power collection module is connected to an output end of the power conversion circuit and is used for collecting output power of the power conversion circuit;
the control module is also connected with the power acquisition module and is also used for receiving the output power output by the power acquisition module.
In a second aspect, embodiments of the present application further provide a power conversion circuit, including:
the first bridge module comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are respectively provided with two switch units connected in series; each switching unit comprises at least two switching tubes connected in parallel;
a driving circuit as in any one of the embodiments of the present application, connected to each switching tube in the first bridge module, for driving the power conversion circuit.
In an embodiment, the power conversion circuit further includes a second bridge module and a transformation module, the transformation module being connected between the first bridge module and the second bridge module;
the first bridge module is also used for connecting direct current equipment, and the second bridge module is also used for connecting a direct current bus; the first bridge module, the second bridge module and the transformation module form a bidirectional DC-DC conversion circuit.
In a third aspect, embodiments of the present application further provide an energy storage device, including a battery module and a power conversion circuit as in any one of the embodiments of the present application;
the power conversion circuit is connected to the battery module and is used for carrying out power conversion on the electric energy transmitted by the battery module and then outputting the electric energy, or carrying out power conversion on the electric energy input from the outside and then outputting the electric energy to the battery module.
The embodiment of the application provides a drive circuit of power conversion circuit, power conversion circuit and energy storage equipment, the power conversion circuit of this application includes first bridge type module, and first bridge type module includes first bridge arm and second bridge arm, and first bridge arm and second bridge arm all are provided with two switching units of establishing ties, and each switching unit includes two at least parallel switching tubes. The driving circuit comprises a control module and at least two driving modules; the control module is respectively connected with each driving module, and each switching tube in each switching unit is independently driven by different driving modules. The control module is used for controlling the driving module to control the working state of the first bridge module. The control module can independently drive different switching tubes of the power conversion circuit through the driving module, so that all switching tubes can be prevented from being opened during light load, switching loss of the switching unit can be reduced, and circuit loss is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of an implementation of a power conversion circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic circuit diagram of another implementation of a power conversion circuit according to an embodiment of the present disclosure;
fig. 3 is a circuit schematic diagram of another implementation of the driving circuit according to the embodiment of the present application;
fig. 4 is a circuit schematic diagram of another implementation of the driving circuit according to the embodiment of the present application;
fig. 5 is a circuit schematic diagram of another implementation of the driving circuit according to the embodiment of the present application;
FIG. 6 is a schematic circuit diagram of another embodiment of a driving circuit according to the present disclosure;
fig. 7 is a circuit schematic diagram of another implementation of the driving circuit according to the embodiment of the present application;
fig. 8 is a schematic diagram of generation of a driving signal according to an embodiment of the present application;
FIG. 9 is a schematic diagram illustrating generation of an output power threshold according to an embodiment of the present disclosure;
FIG. 10 is a schematic block diagram of a power conversion circuit according to an embodiment of the present application;
FIG. 11 is another schematic block diagram of a power conversion circuit provided in an embodiment of the present application;
fig. 12 is a schematic block diagram of an energy storage device according to an embodiment of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used for distinguishing between similar objects and not for describing a particular sequential or chronological order.
The power conversion circuit (PSDR circuit) is configured to convert the voltage output from the battery module into power and output the power to the load connected to the output terminal, but when the battery at the input terminal of the PSDR circuit has a voltage and the output terminal is empty, the PSDR circuit generates no-load loss. That is, the PSDR circuit generates loss during operation, and the circuit loss is large during no-load or light-load, which seriously affects the working efficiency of the PSDR circuit.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of an implementation of a power conversion circuit according to an embodiment of the present application. As shown in fig. 1, the power conversion circuit includes switching transistors Q1 to Q8. Because the current on one side of the power conversion circuit may be larger, the bridge module is formed by adopting a structure that two switching tubes are connected in parallel (such as Q1 and Q2 are connected in parallel, and Q7 and Q8 are connected in parallel).
Referring to fig. 2, fig. 2 is a schematic circuit diagram of another implementation of the power conversion circuit according to the embodiment of the present application. As shown in fig. 2, the power conversion circuit includes a first bridge module 110, where the first bridge module 110 includes a first bridge arm and a second bridge arm, and both the first bridge arm and the second bridge arm are provided with two switching units connected in series, for example, the first bridge arm includes a switching unit 101 and a switching unit 102, and the second bridge arm includes a switching unit 201 and a switching unit 202, where each switching unit includes at least two switching tubes connected in parallel.
The power conversion circuit can convert input direct current or alternating current into electric energy with different voltages, currents or frequencies for output, so that the power conversion function is realized. Two series-connected switch units in the first bridge arm and the second bridge arm can form an H-bridge circuit. The number of the switching tubes connected in parallel in each switching unit may be equal or unequal, and the switching tubes may be triodes or field effect transistors, which is not particularly limited in the embodiment of the present application.
As shown in fig. 2 and 3, the driving circuit of the power conversion circuit includes a control module 210 and at least two driving modules, such as driving module 220 to driving module 22N. The control module 210 is respectively connected with each driving module, and each switching tube in each switching unit is independently driven by a different driving module; the control module 210 is configured to control the driving module to control an operation state of the first bridge module 110.
For example, the driving module 220 may connect one switching tube of the switching units 101, 102, 201, and 202, respectively, and independently drive the connected four switching tubes. The driving module 22N may be connected to another switching tube of the switching units 101, 102, 201, and 202, respectively, and independently drive the connected four switching tubes.
Illustratively, the control module 210 may include a digital signal processing (Digital Signal Processing, DSP) chip and the drive module may include an isolated drive chip. It is understood that the control module 210 may also include a control chip such as a single chip microcomputer and a peripheral circuit, and the driving module may also include a non-isolated chip and a peripheral circuit, which is not limited in this embodiment.
In an embodiment, the number of the switching tubes connected in parallel in each switching unit is a plurality, and the number of the driving modules is the same as the number of the switching tubes in the switching unit. The driving module is connected with at least two switching tubes, and the at least two switching tubes connected with each driving module are located in different switching units.
The number of the switching transistors in the switching units is N, which is a positive integer greater than 1, for example, each of the switching units 101, 102, 201, and 202 includes switching transistors 1 to N. The number of the driving modules may be N, and the number of the driving modules is the same as the number of the switching tubes in the switching unit, for example, the driving modules include the driving modules 1 to N. A driving module 1 may be provided to be connected to the switching tube 1 in each switching unit, a driving module 2 to be connected to the switching tube 2 in each switching unit, … …, and a driving module N to be connected to the switching tube N in each switching unit.
In an embodiment, the control module 210 is further configured to determine a first target operating state of each switching unit and a second target operating state of each switching tube in each switching unit according to the output power of the power conversion circuit. The control module 210 is further configured to output a driving signal to the driving module according to the first target operating state and the second target operating state. The driving module is used for outputting a control signal to the connected switching tube according to the driving signal, and the control signal is used for controlling the switching tube to be turned on or turned off.
The first target operating state may include operating or not operating, and the second target operating state may include on or off. The second target operating state of each switching tube of the switching unit may include on or off when the first target operating state of the switching unit is operating. When the first target working state of the switch unit does not work, the second target working states of the switch tubes of the switch unit can be all disconnected. It should be noted that, after determining the first target operating state of the switching unit and the second target operating state of each switching tube in each switching unit, the control module 210 outputs a driving signal to each driving module, so that the driving module outputs a control signal to the connected switching tube according to the received driving signal, thereby controlling the switching tube to be turned on or off. The driving module is used for independently driving each switching tube in each switching unit, so that the on-off of each switching tube can be controlled according to the output power of the power conversion circuit, and all the switching tubes are not required to be started when the output power is smaller, so that the switching loss of the switching units can be reduced, and the circuit loss of the driving circuit is reduced.
In an embodiment, please refer to fig. 4, fig. 4 is a circuit diagram of another implementation of the driving circuit according to the embodiment of the present application. As shown in fig. 4, the driving circuit further includes a power collection module 230, where the power collection module 230 is connected to an output end of the power conversion circuit, and is configured to collect output power of the power conversion circuit. The control module 210 is further connected to the power collection module 230, and the control module 210 is further configured to receive the output power output by the power collection module 230. It should be noted that, the power collection module 230 may include a power meter, and the power collection module 230 may accurately collect the output power of the power conversion circuit.
In an embodiment, the driving circuit further includes a current sampling module, the current sampling module is connected to an output end of the power conversion circuit, and is used for collecting an output current of the power conversion circuit, the control module 210 is further connected to the current sampling module, and the control module 210 is further used for receiving the output current output by the current sampling module and calculating an output power of the power conversion circuit according to the output current.
In an embodiment, referring to fig. 5, fig. 5 is a schematic circuit diagram of another implementation of the driving circuit according to the embodiment of the present application. As shown in fig. 1 and 5, the driving circuit includes a first driving module 221 and a second driving module 222, and each switching unit includes a first switching tube such as Q1, Q3, Q5, or Q7 in fig. 1 and a second switching tube such as Q2, Q4, Q6, or Q8 in fig. 1. An input end of the first driving module 221 is connected to a first output end of the control module 210, and an output end of the first driving module 221 is connected to first switching tubes (Q1, Q7, Q3, Q5) in each switching unit. An input end of the second driving module 222 is connected to a second output end of the control module 210, and an output end of the second driving module 222 is connected to second switching tubes (Q2, Q8, Q4, Q6) in each switching unit.
The control module 210 is further configured to output a first driving signal to the first driving module 221 when the output power of the power conversion circuit is less than or equal to a first preset power threshold. The first driving module 221 is configured to output a first control signal to a first switching tube in each switching unit according to a first driving signal, where the first control signal is used to control the first switching tube to operate. It should be noted that, when the output power of the power conversion circuit is determined to be less than or equal to the first preset power threshold, the control module 210 may determine the target operating state of the first switching tube in each switching unit, and output the first driving signal to the first driving module 221 according to the target operating state of each first switching tube, so as to control the first switching tube in each switching unit to operate, where the second switching tube may not operate, so that loss may be reduced.
The control module 210 is further configured to output a first driving signal to the first driving module 221 and output a second driving signal to the second driving module 222 when the output power of the power conversion circuit is greater than a first preset power threshold. The first driving module 221 is further configured to output a first control signal to a first switching tube in each switching unit according to the first driving signal, where the first control signal is used to control the first switching tube to operate. The second driving module 222 is further configured to output a second control signal to a second switching tube in each switching unit according to the second driving signal, where the second control signal is used to control the second switching tube to operate. Thus, the first switching tube and the second switching tube in each switching unit are controlled to be in a working state, and the power output requirement of the power conversion circuit can be met.
The control module 210 is further configured to output a second driving signal to the second driving module 222 when the output power of the power conversion circuit increases to be greater than the first preset power threshold. The second driving module 222 is configured to output a second control signal to a second switching tube in each switching unit according to the second driving signal, where the second control signal is used to control the second switching tube to operate. It should be noted that, when the output power of the power conversion circuit increases to be greater than the first preset power threshold, the control module 210 may determine that the first switching tube in each switching unit is already in an operating state, so that it is further required to determine a target operating state of the second switching tube in each switching unit, and output the second driving signal to the second driving module 222 according to the target operating state of each second switching tube, so as to control the second switching tube in each switching unit to operate, where the second control signal for controlling the operation of the second switching tube may be issued synchronously with the first control signal for controlling the operation of the first switching tube, for example, the second control signal PWM2 may be issued simultaneously with the rising (or falling) edge of the first control signal PWM1, so as to ensure that the second switching tube may operate together with the first switching tube, thereby continuously meeting the output power requirement of the power conversion circuit.
The control module 210 is further configured to output a first electrical signal to the first driving module 221 and/or output a second electrical signal to the second driving module 222 when the output power of the power conversion circuit decreases from greater than the first preset power threshold to less than the first preset power. The first driving module 221 is further configured to output a first stop signal to the first switching tube in each switching unit according to the first electrical signal, where the first stop signal is used to control at least one first switching tube to stop working. The second driving module 222 is further configured to output a second stop signal to a second switching tube in each switching unit according to the second point signal, where the second stop signal is used to control at least one second switching tube to stop working. It should be noted that, when the output power of the power conversion circuit is reduced from greater than the first preset power threshold to less than the first preset power, that is, when the power output requirement of the power conversion circuit decreases, the control module 210 may reduce the number of the first switching tubes and/or the second switching tubes, so that the first target operating state of the switching units and the second target operating state of each switching tube in each switching unit may be determined, so as to output the first electrical signal to the first driving module 221 and/or output the second electrical signal to the second driving module 222, thereby respectively controlling different switching tubes, avoiding turning on or off all the switching tubes during light load, and therefore, reducing the switching loss of the switching units, and thus reducing the circuit loss.
In an embodiment, referring to fig. 6, fig. 6 is a schematic circuit diagram of another implementation of a driving circuit according to an embodiment of the present application. As shown in fig. 1 and 6, the driving circuit includes a third driving module 223, a fourth driving module 224, and a fifth driving module 225, and each switching unit includes a first switching tube such as Q1, Q3, Q5, or Q7 in fig. 1, and a second switching tube such as Q2, Q4, Q6, or Q8 in fig. 1. An input end of the third driving module 223 is connected with a first output end of the control module 210, and an output end of the third driving module 223 is respectively connected with first switching tubes Q1, Q7, Q3 and Q5 in each switching unit. An input end of the fourth driving module 224 is connected to the second output end of the control module 210, and an output end of the fourth driving module 224 is connected to the two second switching tubes Q2 and Q8. The input end of the fifth driving module 225 is connected to the third output end of the control module 210, and the output ends of the fifth driving module 225 are respectively connected to the other two second switching tubes Q4 and Q6. The two second switching tubes connected by the fourth driving module 224 and the fifth driving module 225 are located in different switching units.
It should be noted that the number of driving modules may be plural, and the number of switching tubes connected to the driving modules may be equal or unequal. The third driving module 223 as in the present embodiment may be connected to the first switching tube in each switching unit, and the fourth driving module 224 and the fifth driving module 225 are connected to two second switching tubes, and independent control of a plurality of switching tubes (e.g., Q1 to Q8) can be achieved through the third driving module 223, the fourth driving module 224 and the fifth driving module 225, so that switching losses of the switching units can be reduced, thereby reducing circuit losses.
Illustratively, the control module 210 is further configured to output a third driving signal to the third driving module 223 when the output power of the power conversion circuit is less than or equal to the first preset power threshold; the third driving module 223 is configured to output a third control signal to the first switching tube in each switching unit according to the third driving signal, where the third control signal is used to control the first switching tube to operate. The second switching tube may not be operated at this time, so that the loss can be reduced.
The control module 210 is further configured to output a third driving signal to the third driving module 223 and a fourth driving signal to the fourth driving module 224 when the output power of the power conversion circuit is greater than a first preset power threshold. The third driving module 223 is further configured to output a third control signal to the first switching tube in each switching unit according to the third driving signal, where the third control signal is used to control the first switching tube to work. The fourth driving module 224 is further configured to output a fourth control signal to the two connected second switching tubes according to the second driving signal, where the fourth control signal is used to control the second switching tubes to work. In this way, the first switching tube and two second switching tubes in each switching unit are controlled to be in a working state, and the other two second switching tubes are controlled to be in an off state, so that the circuit loss is reduced, and meanwhile, the power output requirement of the power conversion circuit can be met.
The control module 210 is further configured to output a fifth driving signal to the fifth driving module 225 when the output power of the power conversion circuit increases from greater than the first preset power threshold to greater than or equal to the second preset power threshold. The fifth driving module 225 is further configured to output a fifth control signal to the other two connected second switching tubes according to the fifth driving signal, where the fifth control signal is used to control the other two second switching tubes to operate. Thus, the first switching tube and the second switching tube in each switching unit are controlled to be in a working state, and the power output requirement of the power conversion circuit can be met.
Exemplary, as shown in FIGS. 1 and 7, assume that the first preset power threshold is P Critical value of . When the output power of the power conversion circuit<P Critical value of When the load is judged to be smaller in power, the load is in a light-load working mode, namely only PWM1 is used for driving (PWM 1-H, PWM 1-L), namely only switching tubes Q1, Q3, Q5 and Q7 work, and PWM2 is blocked, so that the loss can be reduced. When the output power of the power conversion circuit>P Critical value of At this time, PWM1 and PWM2 are simultaneously controlled to start driving, and at this time, switching transistors Q1 to Q8 are controlled to operate. When the output power of the power conversion circuit is gradually increased from small to large, e.g. the output power of the power conversion circuit>P Critical value of At this time, the PWM1 is already driven (PWM 1-H, PWM 1-L), that is, the Q1, Q3, Q5, Q7 are already in the operating state, and the PWM2 can be independently controlled to start driving (PWM 2-H ), and the switching transistors Q2, Q4, Q6, Q8 are controlled to start operating, thereby completing the operations of the switching transistors Q1 to Q8. In this case, PWM2 needs to be issued synchronously with PWM1 when it is driven, for example, PWM2 may be issued simultaneously with the rising (or falling) edge of PWM1 (i.e., to ensure that all switching tubes are closed simultaneously and open simultaneously). When the output power of the power conversion circuit is greater than P Critical value of When the output power of the converter is smaller than P Critical value of At this time, the PWM2 is independently controlled to start driving (PWM 2-H ), and the switching transistors Q2, Q4, Q6 and Q8 are controlled to be disconnected, so that only Q1, Q3, Q5 and Q7 are in an operating state.
In one embodiment, when the output power of the power conversion circuit increases from 0 to P Critical value of In the case of a + deltap 1,the control module turns on PWM2 driving. When the PWM2 drive is turned on, the output power is reduced to P Critical value of - Δp1, the PMW2 drive is turned off. Wherein DeltaP 1 is a flexibly set positive value, P Critical value of The + [ delta ] P1 can be used as a second preset power threshold that is greater than the first preset power threshold. Therefore, frequent triggering of the execution judgment conditions can be avoided, the switching loss of the switch is reduced, and the service life is prolonged.
Exemplary, as shown in FIG. 8, ΔP1 is 10W when the output power of the power conversion circuit increases from 0 to P Critical value of At +10w, PWM2 driving is turned on. When the PWM2 drive is turned on, the output power is reduced to P Critical value of at-10W, the PMW2 drive is turned off.
In one embodiment, when it is detected that the output power of the power conversion circuit is always at P for a predetermined time Critical value of And when the range of the (+/-) delta P2 is within, the control module outputs PWM1 and PWM2 at the same time. Indicating that the output power is at P Critical value of The vicinity fluctuates back and forth. Thus, PWM1 and PWM2 may be output at this time in order to meet the load power demand and reduce the number of frequent switching, so that the switching transistors Q1 to Q8 are all operated. Wherein, deltaP 2 can be flexibly set according to actual conditions. First, the load power requirement is satisfied, and the switching frequency can be reduced.
In one embodiment, as shown in FIG. 9, P Critical value of The determining method comprises the following steps: testing the efficiency curve of the power conversion circuit only when the PWM1 is driven, and then testing the efficiency curve of the power conversion circuit when the PWM1 and the PWM2 are simultaneously driven, wherein the output power corresponding to the intersection point of the two efficiency curves is P Critical value of 。
The driving circuit of the power conversion circuit of the above embodiment includes a control module 210 and at least two driving modules; the control module 210 is connected to each driving module, and each switching tube in each switching unit is independently driven by a different driving module. The control module 210 is configured to control the driving module to control an operation state of the first bridge module 110. The control module 210 of the present application can independently drive different switching tubes of the power conversion circuit through the driving module, so that all switching tubes can be prevented from being turned on during light load, and thus switching loss of the switching unit can be reduced, and circuit loss is reduced.
Referring to fig. 10, fig. 10 is a schematic circuit diagram of an implementation of a power conversion circuit according to an embodiment of the present disclosure. As shown in fig. 10, the power conversion circuit 300 includes:
the first bridge module 310 comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are respectively provided with two switch units connected in series; each switch unit comprises at least two switch tubes connected in parallel;
the driving circuit 320 of the above embodiment is connected to each switching tube in the first bridge module 310, and is used for driving the power conversion circuit 300.
The first bridge module 310 may be the first bridge module 110 of the above embodiment, and the driving circuit 320 may be the driving circuit of the above embodiment.
In one embodiment, as shown in fig. 11, the power conversion circuit 300 further includes a second bridge module 330 and a transformation module 340, wherein the transformation module 340 is connected between the first bridge module 310 and the second bridge module 330. The first bridge module 310 is also used for connecting to a dc device, and the second bridge module 330 is also used for connecting to a dc bus. The first bridge module 310, the second bridge module 330, and the transformation module 340 constitute a bi-directional DC-DC conversion circuit.
In one embodiment, a first end of the first bridge module 310 is connected to a dc bus, a second end of the first bridge module 310 is used to connect to ac equipment, and the power conversion circuit 300 is an inverter circuit. The alternating current equipment can be commercial power, solar power supply and the like.
It can be appreciated that the beneficial effects of the power conversion circuit 300 provided in the embodiment of the present application can refer to the beneficial effects of the driving circuit provided in the corresponding embodiment, and are not described herein.
Referring to fig. 12, fig. 12 is a schematic block diagram of an energy storage device according to an embodiment of the present application.
As shown in fig. 12, the energy storage device 400 includes:
and a battery module 410.
The power conversion circuit 420 of the above embodiment is connected to the battery module 410, and is configured to perform power conversion on the electric energy transferred by the battery module 410 and output the electric energy, or perform power conversion on the electric energy input from the outside and output the electric energy to the battery module 410.
In one embodiment, the battery module 410 includes one or more electrical energy storage units, such as one or more batteries. The plurality of batteries may be connected in series and parallel to form the battery module 410. The power conversion circuit 420 may be the power conversion circuit 300 of the above embodiment.
It can be appreciated that the beneficial effects of the energy storage device provided in the embodiments of the present application may refer to the beneficial effects of the power conversion circuit and the driving circuit provided in the corresponding embodiments, which are not described herein.
The embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.
Claims (10)
1. The driving circuit of the power conversion circuit is characterized by comprising a first bridge module, wherein the first bridge module comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are respectively provided with two switch units connected in series; each switching unit comprises at least two switching tubes connected in parallel;
the driving circuit comprises a control module and at least two driving modules; the control module is respectively connected with the driving modules, and each switching tube in each switching unit is independently driven by different driving modules; the control module is used for controlling the driving module to control the working state of the first bridge module.
2. The drive circuit of claim 1, wherein the control module is further configured to determine a first target operating state of each of the switching units and a second target operating state of each of the switching tubes in each of the switching units based on an output power of the power conversion circuit; the control module is also used for outputting a driving signal to the driving module according to the first target working state and the second target working state;
the driving module is used for outputting a control signal to the connected switching tube according to the driving signal, and the control signal is used for controlling the switching tube to be turned on or turned off.
3. The drive circuit of claim 1, wherein the drive circuit comprises a first drive module and a second drive module, each of the switching units comprising a first switching tube and a second switching tube; the input end of the first driving module is connected with the first output end of the control module, and the output end of the first driving module is respectively connected with a first switching tube in each switching unit; the input end of the second driving module is connected with the second output end of the control module, and the output end of the second driving module is respectively connected with a second switching tube in each switching unit;
the control module is further configured to output a first driving signal to the first driving module when the output power of the power conversion circuit is less than or equal to a first preset power threshold; the first driving module is used for outputting a first control signal to a first switching tube in each switching unit according to the first driving signal, and the first control signal is used for controlling the first switching tube to work;
the control module is further configured to output a second driving signal to the second driving module when the output power of the power conversion circuit increases to be greater than the first preset power threshold; the second driving module is used for outputting a second control signal to a second switching tube in each switching unit according to the second driving signal, and the second control signal is used for controlling the second switching tube to work.
4. The drive circuit of claim 1, wherein the drive circuit comprises a third drive module, a fourth drive module, and a fifth drive module, each of the switching units comprising a first switching tube and a second switching tube;
the input end of the third driving module is connected with the first output end of the control module, and the output end of the third driving module is respectively connected with a first switching tube in each switching unit;
the input end of the fourth driving module is connected with the second output end of the control module, and the output end of the fourth driving module is connected with two second switching tubes; the input end of the fifth driving module is connected with the third output end of the control module, and the output ends of the fifth driving module are respectively connected with the other two second switching tubes; and the two second switching tubes connected with the fourth driving module and the fifth driving module are positioned in different switching units.
5. The driving circuit according to claim 1, wherein the number of switching tubes connected in parallel in each of the switching units is plural, and the number of the driving modules is the same as the number of switching tubes in the switching units.
6. The driver circuit of claim 1, wherein the control module comprises a DSP chip and the driver module comprises an isolated driver chip.
7. The drive circuit according to any one of claims 1-6, further comprising a power harvesting module connected to an output of the power conversion circuit for harvesting an output power of the power conversion circuit;
the control module is also connected with the power acquisition module and is also used for receiving the output power output by the power acquisition module.
8. A power conversion circuit, comprising:
the first bridge module comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are respectively provided with two switch units connected in series; each switching unit comprises at least two switching tubes connected in parallel;
a drive circuit as claimed in any one of claims 1 to 7, connected to each switching tube in the first bridge module for driving the power conversion circuit.
9. The power conversion circuit of claim 8, further comprising a second bridge module and a transformation module, the transformation module connected between the first bridge module and the second bridge module;
the first bridge module is also used for connecting direct current equipment, and the second bridge module is also used for connecting a direct current bus; the first bridge module, the second bridge module and the transformation module form a bidirectional DC-DC conversion circuit.
10. An energy storage device, comprising: a battery module and a power conversion circuit according to any one of claims 8 to 9;
the power conversion circuit is connected to the battery module and is used for carrying out power conversion on the electric energy transmitted by the battery module and then outputting the electric energy, or carrying out power conversion on the electric energy input from the outside and then outputting the electric energy to the battery module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321536442.9U CN220359026U (en) | 2023-06-15 | 2023-06-15 | Driving circuit of power conversion circuit, power conversion circuit and energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321536442.9U CN220359026U (en) | 2023-06-15 | 2023-06-15 | Driving circuit of power conversion circuit, power conversion circuit and energy storage device |
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| Publication Number | Publication Date |
|---|---|
| CN220359026U true CN220359026U (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321536442.9U Active CN220359026U (en) | 2023-06-15 | 2023-06-15 | Driving circuit of power conversion circuit, power conversion circuit and energy storage device |
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| Country | Link |
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| CN (1) | CN220359026U (en) |
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2023
- 2023-06-15 CN CN202321536442.9U patent/CN220359026U/en active Active
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Address after: 518000 Factory Building 401, Runheng Industrial Plant 1, Fuyuan Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region after: China Address before: 518000, 1st Floor, Building E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region before: China |
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