CN210608927U

CN210608927U - Two-way direct current port starting drive and electric automobile

Info

Publication number: CN210608927U
Application number: CN201921825589.3U
Authority: CN
Inventors: 王宁; 茹永刚; 袁庆民; 陈敬赓; 王利强; 卫建荣; 李建华; 贾淑文
Original assignee: Xian Tgood Intelligent Charging Technology Co Ltd
Current assignee: Xi'an Telai Intelligent Charging Technology Co.,Ltd.
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-05-22
Anticipated expiration: 2029-10-28

Abstract

The utility model provides a two-way direct current port starting drive and electric automobile relates to electric automobile technical field that charges. The bidirectional direct current port starting device comprises a first port, a second port, a voltage conversion unit, a control unit and an auxiliary source power supply unit, wherein the first port, the voltage conversion unit and the second port are sequentially and electrically connected, the first port and the second port are both electrically connected with the auxiliary source power supply unit, the auxiliary source power supply unit is electrically connected with the control unit, and the control unit is electrically connected with the voltage conversion unit; the auxiliary source power supply unit is used for providing working voltage for the control unit when the first port or the second port obtains input voltage; the control unit is used for controlling the voltage conversion unit to work after obtaining the working voltage, so that the first port or the second port obtains the output voltage. The bidirectional direct current port starting device can realize bidirectional starting without being limited by the port.

Description

Two-way direct current port starting drive and electric automobile

Technical Field

The utility model relates to an electric automobile technical field that charges particularly, relates to a two-way straight-flow port starting drive and electric automobile.

Background

With the gradual promotion of new energy electric vehicles in China, the application range of a direct current-direct current (DC-DC) module in the charging industry is gradually expanded. And the bidirectional DC-DC module gradually replaces the unidirectional DC-DC module, and becomes a mainstream product in the charging industry.

However, the current bidirectional DC-DC module can only realize bidirectional startup when a specific port in the dual ports is charged, so that the bidirectional startup is restricted by the port and is inconvenient to apply.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-way direct current port starting drive and electric automobile can not receive the restriction of port alright realize two-way machine of opening.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

in a first aspect, an embodiment of the present invention provides a bidirectional dc port starting device, which includes a first port, a second port, a voltage conversion unit, a control unit and an auxiliary power supply unit, wherein the first port, the voltage conversion unit and the second port are sequentially electrically connected, the first port and the second port are both electrically connected to the auxiliary power supply unit, the auxiliary power supply unit is electrically connected to the control unit, and the control unit is electrically connected to the voltage conversion unit; the auxiliary source power supply unit is used for providing working voltage for the control unit when the first port or the second port obtains input voltage; the control unit is used for controlling the voltage conversion unit to work after obtaining the working voltage, so that the first port or the second port obtains the output voltage.

In a second aspect, an embodiment of the present invention provides an electric vehicle, including a bidirectional dc port starting apparatus, where the bidirectional dc port starting apparatus includes a first port, a second port, a voltage conversion unit, a control unit and an auxiliary power supply unit, the first port, the voltage conversion unit and the second port are electrically connected in sequence, the first port and the second port are both electrically connected to the auxiliary power supply unit, the auxiliary power supply unit is electrically connected to the control unit, and the control unit is electrically connected to the voltage conversion unit; the auxiliary source power supply unit is used for providing working voltage for the control unit when the first port or the second port obtains input voltage; the control unit is used for controlling the voltage conversion unit to work after obtaining the working voltage, so that the first port or the second port obtains the output voltage.

The embodiment of the utility model provides a two-way direct current port starting drive and electric automobile's beneficial effect is: because the first port and the second port are both electrically connected with the auxiliary power supply unit, when the first port or the second port obtains input voltage, the auxiliary power supply unit can provide workable voltage for the control unit, and then the voltage conversion unit is controlled to work, so that the first port or the second port obtains output voltage. Compared with the prior art, the bidirectional direct current port starting device can not be restricted by the port when the bidirectional starting is required, namely, one port of the first port and the second port is not required to be taken as a specific port which is always electrified, when the first port or the second port obtains input voltage, power supply voltage can be provided for the auxiliary power supply unit, the voltage conversion unit can work, and the first port or the second port obtains output voltage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a block diagram of a bidirectional dc port starting apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bidirectional dc port starting device according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a voltage conversion unit of a bidirectional dc port start device according to an embodiment of the present invention;

fig. 4 is a block diagram of an electric vehicle according to an embodiment of the present invention.

Icon: 1-an electric vehicle; 10-bidirectional dc port starting means; 11-a first port; 12-a second port; 13-a voltage conversion unit; 131-a resonant circuit; 132-a buck-boost conversion circuit; 14-a control unit; 141-a first controller; 142-a second controller; 15-auxiliary source power supply unit; 151-first auxiliary supply circuit; 152-a second auxiliary supply circuit; 153-a first diode; 154-a second diode; 155-third diode; 16-a communication unit; 17-a switching unit; 18-a fan; 20-monitoring unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically connected or connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the conventional bidirectional DC-DC module, a specific port in the dual ports is electrically connected to the auxiliary source, and a non-specific port in the dual ports is not electrically connected to the auxiliary source. Therefore, when the device is started from the non-specific port, that is, the non-specific port obtains the input voltage, if the specific port is not charged, the auxiliary source cannot obtain the power supply voltage, the auxiliary source cannot provide the working voltage for the control component of the bidirectional DC-DC module, the bidirectional DC-DC module cannot work normally, and the specific port does not have the output voltage to provide the load. Therefore, in order to realize bidirectional startup of the existing bidirectional DC-DC module, a specific port of the bidirectional DC-DC module needs to be powered all the time, and the restriction ratio is relatively large, so that the application of the bidirectional DC-DC module is inconvenient.

In order to solve the above technical problem, an embodiment of the present invention provides an implementable manner of a bidirectional dc port starting apparatus. Specifically, referring to fig. 1, the bidirectional dc port start device 10 includes a first port 11, a second port 12, a voltage conversion unit 13, a control unit 14, and an auxiliary power supply unit 15, where the first port 11, the voltage conversion unit 13, and the second port 12 are sequentially electrically connected, the first port 11 and the second port 12 are both electrically connected to the auxiliary power supply unit 15, the auxiliary power supply unit 15 is electrically connected to the control unit 14, and the control unit 14 is electrically connected to the voltage conversion unit 13.

In the present embodiment, the auxiliary power supply unit 15 is configured to supply an operating voltage to the control unit 14 when the first port 11 or the second port 12 obtains an input voltage; the control unit 14 is configured to control the voltage conversion unit 13 to operate after obtaining the operating voltage, so that the first port 11 or the second port 12 obtains the output voltage.

It can be seen that, the bidirectional dc port start device 10 does not need any one of the first port 11 and the second port 12 as a specific port that is always charged, when the first port 11 or the second port 12 obtains an input voltage, the auxiliary power supply unit 15 can be supplied with a power supply voltage, and the voltage conversion unit 13 can operate, so that the first port 11 or the second port 12 obtains an output voltage, and then a bidirectional start, that is, a bidirectional flow function of electric energy, can be realized without being limited by the ports.

Fig. 2 is a schematic diagram of an implementable structure of the bidirectional dc port start-up apparatus 10 shown in fig. 1. The auxiliary power supply unit 15 includes a first auxiliary power supply circuit 151 and a second auxiliary power supply circuit 152, the first auxiliary power supply circuit 151 is electrically connected to the first port 11 and the control unit 14, and the second auxiliary power supply circuit 152 is electrically connected to the second port 12 and the control unit 14.

In the present embodiment, the first auxiliary power supply circuit 151 is configured to provide an operating voltage to the control unit 14 when the first port 11 obtains the first input voltage, so that the control unit 14 controls the voltage conversion unit 13 to operate; the second auxiliary power supply circuit 152 is configured to provide an operating voltage to the control unit 14 when the second port 12 obtains the second input voltage, so that the control unit 14 controls the voltage conversion unit 13 to operate.

It will be appreciated that when electrical energy flows from the first port 11 to the second port 12, i.e. the first port 11 is electrically connected to a first external power source, the second port 12 is electrically connected to a first load. The first port 11 obtains a first input voltage provided by the first external power supply and transmits the first input voltage to the first auxiliary power supply circuit 151 and the voltage conversion unit 13 at the same time. The first auxiliary power supply circuit 151 converts the first input voltage into a working voltage required by the control unit 14 to work, and after the control unit 14 obtains the working voltage, the control voltage conversion unit 13 is controlled to perform voltage boosting or voltage dropping processing on the first input voltage, so that the second port 12 obtains a first output voltage, and transmits the first output voltage to the first load.

When power flows from the second port 12 to the first port 11, i.e., the first port 11 is electrically connected to a second load (i.e., the first external power source consumes power as a load), the second port 12 is electrically connected to a second external power source (i.e., the first load supplies power as a power source). The second port 12 obtains a second input voltage provided by the second external power supply and transmits the second input voltage to the second auxiliary power supply circuit 152 and the voltage conversion unit 13 at the same time. The second auxiliary power supply circuit 152 converts the second input voltage into a working voltage required by the control unit 14 to work, and after the control unit 14 obtains the working voltage, the control voltage conversion unit 13 is controlled to perform voltage boosting or voltage dropping processing on the second input voltage, so that the first port 11 obtains a second output voltage, and transmits the second output voltage to the second load.

The first input voltage, the second input voltage, the first output voltage, the second output voltage and the working voltage are all direct current voltages.

In this embodiment, the first auxiliary power supply circuit 151 and the second auxiliary power supply circuit 152 may both adopt a flyback circuit, and may step down the first input voltage to the first operating voltage, or may step down the second input voltage to the second operating voltage. The first operating voltage and the second operating voltage may be the same or different. For example, the first input voltage of 24V may be reduced to a first operating voltage of 5V, or the second input voltage of 48V may be reduced to a second operating voltage of 5V, but the present invention is not limited thereto, and the first auxiliary power supply circuit 151 and the second auxiliary power supply circuit 152 may be adjusted in accordance with actual conditions.

In this embodiment, the voltage conversion unit 13 includes a resonant circuit 131 and a buck-boost conversion circuit 132, the control unit 14 includes a first controller 141 and a second controller 142, the first port 11, the buck-boost conversion circuit 132, the resonant circuit 131, and the second port 12 are sequentially electrically connected, the first controller 141 is electrically connected to the buck-boost conversion circuit 132, the first auxiliary power supply circuit 151, and the second auxiliary power supply circuit 152, and the second controller 142 is electrically connected to the resonant circuit 131, the second auxiliary power supply circuit 152, and the first auxiliary power supply circuit 151.

In this embodiment, the first controller 141 is configured to control the buck-boost conversion circuit 132 to operate when obtaining the operating voltage provided by the first auxiliary power supply circuit 151 or the second auxiliary power supply circuit 152; the second controller 142 is used for controlling the resonant circuit 131 to operate when obtaining the operating voltage provided by the first auxiliary power supply circuit 151 or the second auxiliary power supply circuit 152.

It is understood that when the first port 11 is powered off, i.e. the first port 11 obtains the first input voltage, the first auxiliary power supply circuit 151 provides the operating voltage to the first controller 141 and the second controller 142 at the same time. After obtaining the operating voltage, the first controller 141 controls the buck-boost conversion circuit 132 to perform a boost or buck process on the first input voltage. After obtaining the operating voltage, the second controller 142 controls the resonant circuit 131 to operate, and isolates the buck-boost converting circuit 132 from the second port 12, so that the second port 12 obtains the first output voltage.

When the second input voltage is obtained from the second port 12, the second auxiliary power supply circuit 152 simultaneously provides the operating voltage to the first controller 141 and the second controller 142. After obtaining the operating voltage, the second controller 142 controls the resonant circuit 131 to operate, and isolates the buck-boost converting circuit 132 from the second port 12. After obtaining the operating voltage, the first controller 141 controls the buck-boost conversion circuit 132 to perform a boost or buck process on the second input voltage, so that the first port 11 obtains a second output voltage.

Further, in the present embodiment, the auxiliary power supply unit 15 further includes a first diode 153, an anode of the first diode 153 is electrically connected to the first auxiliary power supply circuit 151, and a cathode of the first diode 153 is electrically connected to the second controller 142.

It is understood that when the device is turned on from the first port 11, the first auxiliary power supply circuit 151 simultaneously supplies the operating voltage to the first controller 141 and the second controller 142. When the start-up from the first port 11 is completed, that is, the second port 12 obtains the first output voltage, the second port 12 also transmits the first output voltage to the second auxiliary power supply circuit 152, and the second auxiliary power supply circuit 152 converts the first output voltage into the operating voltage required by the second controller 142. Since the second auxiliary power supply circuit 152 supplies an operating voltage to the second controller 142 higher than the operating voltage supplied to the second controller 142 by the first auxiliary power supply circuit 151, the cathode voltage of the first diode 153 is higher than the anode voltage thereof, the first diode 153 is in a reverse blocking state, and thus the first auxiliary power supply circuit 151 and the second controller 142 are in an off state.

That is, when the device is turned on from the first port 11, the first input voltage is obtained from the first port 11, and the first output voltage is not obtained from the second port 12, so the operating voltages of the first controller 141 and the second controller 142 are provided by the first auxiliary power supply circuit 151. When the start-up from the first port 11 is completed, the second port 12 obtains the first output voltage, so that the first auxiliary power supply circuit 151 no longer supplies power to the second controller 142, and the second auxiliary power supply circuit 152 supplies power to the second controller 142. After the start-up is completed, the second controller 142 is only powered by the second auxiliary power supply circuit 152, but not both the first auxiliary power supply circuit 151 and the second auxiliary power supply circuit 152 are powered to the second controller 142, so that the energy consumption can be reduced.

Further, in the present embodiment, the auxiliary power supply unit 15 further includes a second diode 154, an anode of the second diode 154 is electrically connected to the second auxiliary power supply circuit 152, and a cathode of the second diode 154 is electrically connected to the first controller 141.

It is to be understood that when the device is turned on from the second port 12, the second auxiliary power supply circuit 152 simultaneously supplies the operating voltage to the first controller 141 and the second controller 142. When the start-up from the second port 12 is completed, that is, the first port 11 obtains the second output voltage, the first port 11 also transmits the second output voltage to the first auxiliary power supply circuit 151, and the first auxiliary power supply circuit 151 converts the second output voltage into the operating voltage required by the first controller 141. Since the operating voltage supplied to the first controller 141 by the first auxiliary power supply circuit 151 is higher than the operating voltage supplied to the first controller 141 by the second auxiliary power supply circuit 152, the cathode voltage of the second diode 154 is higher than the anode voltage thereof, the second diode 154 is in the reverse blocking state, and thus the second auxiliary power supply circuit 152 and the first controller 141 are in the off state.

That is, when the device is powered on from the second port 12, the second port 12 obtains the second input voltage, and the first port 11 does not obtain the second output voltage, so the operating voltages of the first controller 141 and the second controller 142 are provided by the second auxiliary power supply circuit 152. When the start-up from the second port 12 is completed, the first port 11 obtains the second output voltage, so the second auxiliary power supply circuit 152 no longer supplies power to the first controller 141, and the first auxiliary power supply circuit 151 supplies power to the first controller 141. After the start-up is completed, the first controller 141 is only powered by the first auxiliary power supply circuit 151, and the first auxiliary power supply circuit 151 and the second auxiliary power supply circuit 152 are not both powered to the first controller 141, so that the energy consumption can be reduced.

Further, in the present embodiment, the auxiliary power supply unit 15 further includes a third diode 155, an anode of the third diode 155 is electrically connected to the second auxiliary power supply circuit 152, and a cathode of the third diode 155 is electrically connected to the control unit 14.

It is understood that the cathode of the third diode 155 is electrically connected to the second controller 142 and also electrically connected to the cathode of the first diode 153, and the third diode 155 is used for preventing the first auxiliary power supply circuit 151 from providing the operating voltage for the fan 18 due to the forward conduction of the first diode 153. Since the fan 18 is a heavy load, its operating voltage can only be taken from the output of the second auxiliary power supply circuit 152.

Further, in this embodiment, the control unit 14 further includes a plurality of voltage collectors (not shown) and a plurality of current collectors (not shown), wherein some of the plurality of voltage collectors and some of the plurality of current collectors are electrically connected to the first controller 141 and the buck-boost converting circuit 132, and the remaining of the plurality of voltage collectors and the remaining of the plurality of current collectors are electrically connected to the second controller 142 and the resonant circuit 131.

Some of the plurality of voltage collectors are configured to collect the first voltage signal of the buck-boost conversion circuit 132 and transmit the first voltage signal to the first controller 141, and some of the plurality of current collectors are configured to collect the first current signal of the buck-boost conversion circuit 132 and transmit the first current signal to the first controller 141. The first controller 141 is configured to obtain a first adjustment instruction according to the first voltage signal and the first current signal, and send the first adjustment instruction to the buck-boost conversion circuit 132, so that the buck-boost conversion circuit 132 converts the input voltage into an output voltage required by the load according to the first adjustment instruction. The remaining voltage collectors of the plurality of voltage collectors are configured to collect the second voltage signal of the resonant circuit 131 and transmit the second voltage signal to the second controller 142, and the remaining current collectors of the plurality of current collectors are configured to collect the second current signal of the resonant circuit 131 and transmit the second current signal to the second controller 142. The second controller 142 is configured to obtain a second adjustment instruction according to the second voltage signal and the second current signal, and transmit the second adjustment instruction to the resonant circuit 131, so that the resonant circuit 131 operates in the width-modulated state when in soft start, and operates at a fixed frequency point with a gain of approximately 1 after normal output. Wherein, the first adjusting instruction and the second adjusting instruction can be PWM signals.

The first controller 141 is further configured to determine whether the buck-boost conversion circuit 132 has a short-circuit fault, an overvoltage fault, or an overcurrent fault according to the first voltage signal and the first current signal, and when the buck-boost conversion circuit 132 has the short-circuit fault, the overvoltage fault, or the overcurrent fault, the first controller 141 controls the buck-boost conversion circuit 132 to stop working. The second controller 142 is further configured to determine whether the resonant circuit 131 has a short-circuit fault, an overvoltage fault, or an overcurrent fault according to the second voltage signal and the second current signal, and when the resonant circuit 131 has the short-circuit fault, the overvoltage fault, or the overcurrent fault, the second controller 142 controls the resonant circuit 131 to stop operating.

In this embodiment, each of the first controller 141 and the second controller 142 may adopt a Digital Signal Processing (DSP) chip; the resonant circuit 131 may adopt an LLC resonant circuit 131, and the BUCK-BOOST conversion circuit 132 may adopt a BUCK-BOOST circuit; the voltage collector can adopt an operational amplifier; the current collector can adopt a Hall and a current transformer.

Further, in the present embodiment, the bidirectional dc port start-up device 10 further includes a communication unit 16, the communication unit 16 is electrically connected to the second auxiliary power supply circuit 152, and the communication unit 16 is communicatively connected to both the second controller 142 and a monitoring unit 20. The second controller 142 is configured to receive a shutdown instruction sent by the monitoring unit 20 through the communication unit 16, and control the first auxiliary power supply circuit 151 to stop working according to the shutdown instruction.

In this embodiment, the first controller 141 and the second controller 142 are communicatively connected, when the power flows from the second port 12 to the first port 11, if the bidirectional dc port starting apparatus 10 is in a standby state, the monitoring unit 20 sends a shutdown instruction to the second controller 142 through the communication unit 16, the second controller 142 serves as an intermediate transmission unit and sends the shutdown instruction to the first controller 141, the first controller 141 stops working according to the shutdown instruction, that is, stops sending the driving signal to the buck-boost conversion circuit 132, and the buck-boost conversion circuit 132 also stops working correspondingly. The second controller 142 sends a power-off signal to the first auxiliary power supply circuit 151 according to the power-off instruction, so that the first auxiliary power supply circuit 151 stops working. When the bi-directional dc port start device 10 is in the standby state, only the second auxiliary power supply circuit 152 is used to supply power to the communication unit 16 and the second controller 142 in communication with the monitoring unit 20, so as to reduce the standby power consumption, and meanwhile, the communication is not interrupted, and no additional power level switch device and corresponding power supply unit are required, so that the heavy load efficiency is not affected.

In the present embodiment, the communication unit 16 may employ CAN communication.

Further, in the present embodiment, the bidirectional dc port start-up device 10 further includes a switch unit 17, and the second controller 142 is electrically connected to the first auxiliary power supply circuit 151 through the switch unit 17. The switching unit 17 is configured to be in a conducting state when the second controller 142 sends a turn-off auxiliary power supply signal to the first auxiliary power supply circuit 151.

In this embodiment, the switch unit 17 may use a disconnecting switch, and the disconnecting switch may use an optical coupler. The second controller 142 may be electrically isolated from the first auxiliary power supply circuit 151 using the switching unit 17.

Further, in the present embodiment, the bidirectional dc port start-up device 10 further includes a fan 18, and the fan 18 is electrically connected to the second auxiliary power supply circuit 152. The second auxiliary power supply circuit 152 supplies power to the fan 18, so that the fan 18 performs heat dissipation and temperature reduction for the main power circuit (i.e., the voltage conversion unit 13) of the bidirectional dc port start-up device 10.

Fig. 3 is a schematic diagram of an implementation of the resonant circuit 131 and the buck-boost converter 132 shown in fig. 2. The buck-boost conversion circuit 132 includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, a fifth MOS transistor Q5, a sixth MOS transistor Q6, a seventh MOS transistor Q7, an eighth MOS transistor Q8, a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a first resistor R1. The first controller 141 is electrically connected to the gate of the first MOS transistor Q1, the gate of the second MOS transistor Q2, the gate of the third MOS transistor Q3, the gate of the fourth MOS transistor Q4, the gate of the fifth MOS transistor Q5, the gate of the sixth MOS transistor Q6, the gate of the seventh MOS transistor Q7, and the gate of the eighth MOS transistor Q8.

The first controller 141 transmits a first adjustment instruction to the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, the fourth MOS transistor Q4, the fifth MOS transistor Q5, the sixth MOS transistor Q6, the seventh MOS transistor Q7, and the eighth MOS transistor Q8, and controls the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, the fourth MOS transistor Q4, the fifth MOS transistor Q5, the sixth MOS transistor Q6, the seventh MOS transistor Q7, and the eighth MOS transistor Q8 to be turned on and off by the first adjustment instruction. And further realizing the boosting or the reducing of the input voltage to obtain the output voltage.

Further, in this embodiment, the resonant circuit 131 includes a ninth MOS transistor Q9, a tenth MOS transistor Q10, an eleventh MOS transistor Q11, a twelfth MOS transistor Q12, a thirteenth MOS transistor Q13, a fourteenth MOS transistor Q14, a fifteenth MOS transistor Q15, a sixteenth MOS transistor Q16, a seventeenth MOS transistor Q17, an eighteenth MOS transistor Q18, a nineteenth MOS transistor Q19, a twentieth MOS transistor Q20, a twenty-first MOS transistor Q21, a twenty-second MOS transistor Q22, a twenty-third MOS transistor Q23, a twenty-fourth MOS transistor Q24, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a third inductor L3, a fourth inductor L4, a first transformer T1, a second transformer T2, and a second resistor 2. The second controller 142 is electrically connected to a ninth MOS transistor Q9, a tenth MOS transistor Q10, an eleventh MOS transistor Q11, a twelfth MOS transistor Q12, a thirteenth MOS transistor Q13, a fourteenth MOS transistor Q14, a fifteenth MOS transistor Q15, a sixteenth MOS transistor Q16, a seventeenth MOS transistor Q17, an eighteenth MOS transistor Q18, a nineteenth MOS transistor Q19, a twentieth MOS transistor Q20, a twenty-first MOS transistor Q21, a twenty-twelfth MOS transistor Q22, a twenty-thirteenth MOS transistor Q23, and a twenty-fourteenth MOS transistor Q24.

The second controller 142 is configured to transmit a second adjustment command to the ninth MOS transistor Q9, the tenth MOS transistor Q10, the eleventh MOS transistor Q11, the twelfth MOS transistor Q12, the thirteenth MOS transistor Q13, the fourteenth MOS transistor Q14, the fifteenth MOS transistor Q15, the sixteenth MOS transistor Q16, the seventeenth MOS transistor Q17, the eighteenth MOS transistor Q18, the nineteenth MOS transistor Q19, the twentieth MOS transistor Q20, the twenty-first MOS transistor Q21, the twenty-second MOS transistor Q22, the twenty-third MOS transistor Q23, and the twenty-fourth MOS transistor Q24, and the ninth MOS tube Q9, the tenth MOS tube Q10, the eleventh MOS tube Q11, the twelfth MOS tube Q12, the thirteenth MOS tube Q13, the fourteenth MOS tube Q14, the fifteenth MOS tube Q15, the sixteenth MOS tube Q16, the seventeenth MOS tube Q17, the eighteenth MOS tube Q18, the nineteenth MOS tube Q19, the twentieth MOS tube Q20, the twenty-first MOS tube Q21, the twelfth MOS tube Q22, the twenty-third MOS tube Q23 and the twenty-fourth MOS tube Q24 are controlled to be turned on and off by a second regulating instruction. And further, the resonant circuit 131 works in the width modulation state during soft start and works at a fixed frequency point with the gain of approximately 1 after normal output.

In this embodiment, the bi-directional dc port start device 10 can be applied to an electric vehicle, please refer to fig. 4, which is a block diagram of an implementable structure of the electric vehicle 1. The electric vehicle 1 includes a bidirectional dc port starting device 10 and a monitoring unit 20, and the bidirectional dc port starting device 10 is in communication connection with the monitoring unit 20. The monitoring unit 20 may be an upper computer.

To sum up, the utility model provides a two-way direct current port starting drive includes first port, second port, voltage conversion unit, the control unit and auxiliary source power supply unit, and first port, voltage conversion unit, second port electricity in proper order are connected, and first port and second port all are connected with auxiliary source power supply unit electricity, and auxiliary source power supply unit is connected with the control unit electricity, and the control unit is connected with voltage conversion unit electricity; the auxiliary source power supply unit is used for providing working voltage for the control unit when the first port or the second port obtains input voltage; the control unit is used for controlling the voltage conversion unit to work after obtaining the working voltage, so that the first port or the second port obtains the output voltage. Compared with the prior art, the bidirectional direct current port starting device can not be restricted by the port when the bidirectional starting is required, namely, one port of the first port and the second port is not required to be taken as a specific port which is always electrified, when the first port or the second port obtains input voltage, power supply voltage can be provided for the auxiliary power supply unit, the voltage conversion unit can work, and the first port or the second port obtains output voltage.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bidirectional direct current port starting device is characterized by comprising a first port, a second port, a voltage conversion unit, a control unit and an auxiliary source power supply unit, wherein the first port, the voltage conversion unit and the second port are sequentially and electrically connected, the first port and the second port are both electrically connected with the auxiliary source power supply unit, the auxiliary source power supply unit is electrically connected with the control unit, and the control unit is electrically connected with the voltage conversion unit;

the auxiliary power supply unit is used for providing working voltage for the control unit when the first port or the second port obtains input voltage;

the control unit is used for controlling the voltage conversion unit to work after the working voltage is obtained, so that the first port or the second port obtains an output voltage.

2. The bi-directional dc port activation device of claim 1, wherein said auxiliary power supply unit comprises a first auxiliary power supply circuit and a second auxiliary power supply circuit, said first auxiliary power supply circuit being electrically connected to said first port and said control unit, said second auxiliary power supply circuit being electrically connected to said second port and said control unit;

the first auxiliary power supply circuit is used for providing working voltage for the control unit when the first port obtains first input voltage, so that the control unit can control the voltage conversion unit to work;

the second auxiliary power supply circuit is used for providing working voltage for the control unit when the second port obtains second input voltage, so that the control unit can control the voltage conversion unit to work.

3. The bi-directional dc port start-up apparatus of claim 2, wherein the voltage conversion unit comprises a resonant circuit and a buck-boost conversion circuit, the control unit comprises a first controller and a second controller, the first port, the buck-boost conversion circuit, the resonant circuit and the second port are electrically connected in sequence, the first controller is electrically connected to the buck-boost conversion circuit, the first auxiliary power supply circuit and the second auxiliary power supply circuit, and the second controller is electrically connected to the resonant circuit, the second auxiliary power supply circuit and the first auxiliary power supply circuit;

the first controller is used for controlling the buck-boost conversion circuit to work when the working voltage provided by the first auxiliary source power supply circuit or the second auxiliary source power supply circuit is obtained;

the second controller is used for controlling the resonant circuit to work when the working voltage provided by the first auxiliary power supply circuit or the second auxiliary power supply circuit is obtained.

4. The bi-directional dc port start-up apparatus of claim 3, wherein the auxiliary source power supply unit further comprises a first diode, an anode of the first diode being electrically connected to the first auxiliary source power supply circuit, a cathode of the first diode being electrically connected to the second controller;

the first diode is used for being in a forward conduction state when the first auxiliary source power supply circuit provides the working voltage for the first controller and the second controller; the first diode is further used for being in a reverse cut-off state when the second auxiliary source power supply circuit provides the working voltage for the second controller, so that the first auxiliary source power supply circuit stops providing the working voltage for the second controller.

5. The bi-directional direct current port start device of claim 3, wherein the auxiliary power supply unit further comprises a second diode, an anode of the second diode being electrically connected to the second auxiliary power supply circuit, a cathode of the second diode being electrically connected to the first controller;

the second diode is used for being in a forward conduction state when the second auxiliary power supply circuit provides the working voltage for the first controller and the second controller; the second diode is also used for being in a reverse cut-off state when the first auxiliary source power supply circuit provides the working voltage for the first controller, so that the second auxiliary source power supply circuit stops providing the working voltage for the first controller.

6. The bi-directional dc port start-up device of claim 3, further comprising a communication unit, said communication unit being electrically connected to said second auxiliary power supply circuit, said communication unit being communicatively connected to both said second controller and a monitoring unit;

the second controller is used for receiving a shutdown instruction sent by the monitoring unit through the communication unit and controlling the first auxiliary power supply circuit to stop working according to the shutdown instruction.

7. The bi-directional dc port start device of claim 6, further comprising a switching unit, wherein the second controller is electrically connected to the first auxiliary power supply circuit through the switching unit.

8. The bi-directional direct current port start device of claim 2, wherein the auxiliary power supply unit further comprises a third diode, an anode of the third diode being electrically connected to the second auxiliary power supply circuit, and a cathode of the third diode being electrically connected to the control unit.

9. The bi-directional dc port start-up apparatus of claim 2, further comprising a fan electrically connected to the second auxiliary power supply circuit.

10. An electric vehicle comprising the bidirectional dc port starter of any one of claims 1 to 9.