CN212708980U - Portable emergency charging and discharging device for electric automobile - Google Patents
Portable emergency charging and discharging device for electric automobile Download PDFInfo
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- CN212708980U CN212708980U CN202020753696.6U CN202020753696U CN212708980U CN 212708980 U CN212708980 U CN 212708980U CN 202020753696 U CN202020753696 U CN 202020753696U CN 212708980 U CN212708980 U CN 212708980U
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- 238000007600 charging Methods 0.000 title claims abstract description 149
- 238000007599 discharging Methods 0.000 title claims abstract description 73
- 239000003990 capacitor Substances 0.000 claims abstract description 65
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 58
- 230000000694 effects Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010280 constant potential charging Methods 0.000 description 6
- 238000010277 constant-current charging Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
本实用新型公开了一种电动汽车便携式应急充放电装置，包括有与交流电源相连接的有线交流充放电接口、与直流电源相连接的有线直流充放电接口、以及可进行无线充电的无线充放电电路，无线充放电电路包括有无线充放电接口；还包括有控制电路及分别与控制电路相连的桥式双向整流器、双向DC‑DC变换器和超级电容器组。本实用新型具有以下优点和效果：可从不同类型电源中快速得到电能储存在大容量超级电容器中，再对电量不足电动汽车进行快速充电，给电动汽车提供一定的续航电能。
The utility model discloses a portable emergency charging and discharging device for electric vehicles, which comprises a wired alternating current charging and discharging interface connected with an alternating current power supply, a wired direct current charging and discharging interface connected with the direct current power supply, and a wireless charging and discharging device capable of wireless charging The wireless charging and discharging circuit includes a wireless charging and discharging interface; it also includes a control circuit and a bridge bidirectional rectifier, a bidirectional DC-DC converter and a supercapacitor bank respectively connected with the control circuit. The utility model has the following advantages and effects: the electric energy can be quickly obtained from different types of power sources and stored in the large-capacity super capacitor, and then the electric vehicle with insufficient electric power can be quickly charged to provide the electric vehicle with a certain range of electric energy.
Description
Technical Field
The utility model relates to an electric energy transmission technology and novel energy conversion technical field, in particular to portable emergent charge-discharge device of electric automobile.
Background
With the popularization of electric vehicles and the development of charging technologies, electric vehicles with different storage battery capacities and voltages, and charging devices such as vehicle-mounted charging, alternating current charging, direct current charging, wireless charging and the like exist on the market. In the driving process of the electric automobile, if the electric quantity of the energy storage device is insufficient, the electric automobile cannot continuously run to the charging station. Therefore, it is necessary to provide a portable electric vehicle mobile emergency charging and discharging device, which provides a certain amount of electric energy to the electric vehicle, so that the electric vehicle can continue to run.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a portable emergent charge and discharge device of electric automobile, the power supply of usable difference is to ultracapacitor system quick charge, carries out quick charge to the electric automobile that the electric quantity is not enough again.
The above technical purpose of the present invention can be achieved by the following technical solutions: a portable emergency charging and discharging device for an electric automobile comprises a wired alternating current charging and discharging interface connected with an alternating current power supply, a wired direct current charging and discharging interface connected with a direct current power supply and a wireless charging and discharging circuit capable of performing wireless charging, wherein the wireless charging and discharging circuit comprises a wireless charging and discharging interface; the control circuit is connected with the bridge type bidirectional rectifier, the bidirectional DC-DC converter and the super capacitor bank respectively; the wired alternating current charging and discharging interface and the wireless charging and discharging circuit are connected with a bridge type bidirectional rectifier, the bridge type bidirectional rectifier is connected with a bidirectional DC-DC converter, the bidirectional DC-DC converter is connected with a super capacitor bank, the wired direct current charging and discharging interface is connected with the bidirectional DC-DC converter, and the control circuit is further connected with the wireless charging and discharging circuit.
The further setting is that: the bridge type bidirectional rectifier is composed of four rectifying arms, each rectifying arm is composed of a full-control device IGBT and an inverse parallel diode, and the control circuit is connected with the four rectifying arms and controls the on-off and current flow direction of the four rectifying arms.
The further setting is that: the bidirectional DC-DC converter is a bidirectional Buck/boost type bidirectional DC-DC converter composed of a full-control device IGBT and a reverse parallel diode.
The further setting is that: the super capacitor group comprises a group of super capacitors, and the super capacitors are connected in series with an inductor Lc for reducing the interference of current fluctuation on charging.
The further setting is that: the wireless charging and discharging circuit comprises a transmitting and receiving coil Ls, a compensation inductor Lk, a compensation capacitor Cs, a relay 1, a relay 2 and a relay 3, wherein the relay 1, the relay 2 and the relay 3 are used for controlling topology switching of the wireless charging and discharging circuit, and therefore charging switching of the super capacitor bank is conducted in different modes.
The further setting is that: the wireless charging and discharging circuit also comprises a coil position control device for adjusting the positions of the transmitting and receiving coil Ls and the transmitting coil to be charged.
The beneficial effects of the utility model reside in that:
1. the utility model discloses utilize a portable removal emergency charging and discharging device, obtain the electric energy from different types of power fast and store in the ultracapacitor system of large capacity, carry out quick charge to the electric automobile that the electric quantity is not enough again, provide certain electric energy for electric automobile, make it can continue to travel to nearest charging station (stake) position. The emergency charging and discharging device is suitable for different types of nearby power supplies, such as a wired alternating current charging station (pile), a wired direct current charging station (pile), a wireless charging station (pile), an electric vehicle with electricity, a storage battery with electricity and the like.
2. The utility model relates to the portable emergent charge-discharge device that removes of electric automobile compares current fixed position's charging station (stake), has better flexibility. Meanwhile, the device is also applicable to other types of electric devices (such as electric vehicles, battery cars and the like). Small volume, simple circuit, convenient integration and easy popularization.
Drawings
FIG. 1 is a functional block diagram of an embodiment;
FIG. 2 is a block diagram of the embodiment;
FIG. 3 is a circuit diagram of an embodiment;
FIG. 4 is a schematic diagram illustrating the current flow during charging of an exemplary supercapacitor;
FIG. 5 is a schematic diagram illustrating the current flow during the discharge of the supercapacitor in the embodiment.
In the figure: 11. a wired AC charge-discharge interface; 12. a wired direct current charge-discharge interface; 13. a wireless charging and discharging circuit; 14. a bridge type bidirectional rectifier; 15. a bidirectional DC-DC converter; 16. a supercapacitor bank; 17. a control circuit; 18. a drive and protection circuit; 19. a charge and discharge voltage and current measuring circuit; 131. a coil position control device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, a portable emergency charging and discharging device for an electric vehicle includes a wired ac charging and discharging interface 11 connected to an ac power supply, a wired dc charging and discharging interface 12 connected to a dc power supply, and a wireless charging and discharging circuit 13 capable of performing wireless charging, where the wireless charging and discharging circuit 13 includes a wireless charging and discharging interface; the system also comprises a control circuit 17, and a bridge type bidirectional rectifier 14, a bidirectional DC-DC converter 15 and a super capacitor bank 16 which are respectively connected with the control circuit 17; the wired alternating current charging and discharging interface 11 and the wireless charging and discharging circuit 13 are connected with a bridge type bidirectional rectifier 14, the bridge type bidirectional rectifier 14 is connected with a bidirectional DC-DC converter 15, the bidirectional DC-DC converter 15 is connected with a super capacitor bank 16, the wired direct current charging and discharging interface 12 is connected with the bidirectional DC-DC converter 15, and the control circuit 17 is also connected with the wireless charging and discharging circuit 13; of course, in this embodiment, the charging/discharging voltage/current measuring circuit 19 and the driving and protecting circuit 18 in the prior art can be provided to make the operation of the apparatus more reliable.
The bridge bidirectional rectifier 14 is composed of four rectifying arms, each of the rectifying arms is composed of a full-control device IGBT (e.g., S1-S4 in fig. 3) and an antiparallel diode (e.g., D1-D4 in fig. 3), and the control circuit 17 is connected to the four rectifying arms and controls the on-off and current flow direction of the four rectifying arms; the upper and lower rectification arms are complementary in on-off, and the front and rear rectification arms are complementary in on-off or have adjustable phase difference. When a super capacitor (such as Sc in the attached figure 3) of the device is charged by an alternating current power supply or a wireless charging power supply, S1-S4 and D1-D4 form a rectifying circuit, and when the super capacitor of the device is used for wirelessly charging an electric automobile to be charged or charging an automobile-mounted charger, S1-S4 and D1-D4 form an inverter circuit. The working driving signal of the bridge type bidirectional rectifier 14 is usually a high-frequency signal of 80kHz to 120kHz when wirelessly charging and discharging, and the working driving signal of the bridge type bidirectional rectifier 14 is usually a 50Hz power frequency signal when wiredly alternating-current charging and discharging.
The bidirectional DC-DC converter 15 is a bidirectional Buck/boost type bidirectional DC-DC converter composed of fully-controlled devices IGBT (e.g., S5-S6 in fig. 3) and antiparallel diodes (e.g., D5-D6 in fig. 3).
The supercapacitor bank 16 includes a group of supercapacitors, and the supercapacitors are connected in series with an inductor Lc for reducing interference of current fluctuation with charging.
When the super capacitor of the device is charged, S5-S6 in the bidirectional DC-DC converter 15 works in a Buck Buck mode, and when the super capacitor of the device is discharged, S5-S6 in the bidirectional DC-DC converter 15 works in a Buck Boost mode.
The wireless charging and discharging circuit 13 comprises a transmitting and receiving coil Ls, a compensation inductor Lk, a compensation capacitor Cs, a relay 1, a relay 2 and a relay 3, wherein the relay 1, the relay 2 and the relay 3 are used for controlling topology switching of the wireless charging and discharging circuit 13, so that charging switching of the super capacitor bank 16 in different modes is performed. When the relay 1 and the relay 2 are closed and the relay 3 is opened, a super capacitor constant current charging mode is formed for the LCL topology, and when the relay 1 and the relay 2 are opened and the relay 3 is closed, a super capacitor constant voltage charging mode is formed for the S topology.
The wireless charging and discharging circuit 13 further includes a coil position control device 131 for adjusting the positions of the transmitting and receiving coil Ls and the transmitting and receiving coil to be charged. The coil position control device 131 belongs to the existing technical field, is a system for aligning the positions of a transmitting and receiving coil Ls and a receiving and transmitting coil to be charged, and generally comprises 2 micro-stepping motors and a cross-shaped screw rod.
The process of carrying out quick charge to this device does: for the power supply which is an alternating current charging pile or an alternating current power supply, a wired charging mode is adopted, the power supply is connected to a wired alternating current charging and discharging interface 11, and the super capacitor is charged through a bridge type bidirectional rectifier 14 and a bidirectional DC-DC converter 15; when the power supply is a direct current charging pile or a storage battery, the power supply is connected to the wired direct current charging and discharging interface 12 and charges the super capacitor through the bidirectional DC-DC converter 15; for the electric vehicle with the wireless charging pile or the wireless charging electric vehicle, the power supply is connected to a wireless charging and discharging interface, the coil position control device 131 is used for adjusting the alignment of the transmitting and receiving coil Ls and the transmitting coil of the charging pile or the electric vehicle, the transmitting and receiving coil Ls receives a high-frequency magnetic field emitted by the charging pile or the nearby electric vehicle, induces a high-frequency alternating current voltage, and the super capacitor is charged through the bridge type bidirectional rectifier 14 and the bidirectional DC-DC converter 15. The wireless charging and discharging circuit 13 in the device can be switched on and off through the relays 1-3 to change the topological structure of the resonant network, so that constant-current or constant-voltage charging of the super capacitor is realized. When other power supplies are used for charging the super capacitor, the control circuit 17 can control the bidirectional DC-DC converter 15 to realize constant-current or constant-voltage charging of the super capacitor.
The process that this device carries out quick charge to the electric automobile that the electric quantity is not enough does: for the electric automobile with the on-board charger and insufficient electric quantity, a wired charging mode is adopted, the on-board charger is connected to a wired alternating current charging and discharging interface 11 of the device, the super capacitor obtains alternating current which is the same as commercial power through a bidirectional DC-DC converter 15 and a bridge type bidirectional rectifier 14, and the electric automobile with the insufficient electric quantity is charged through the on-board charger; for the electric automobile without the vehicle-mounted charger and with insufficient electric quantity, a storage battery to be charged is connected to the wired direct-current charging and discharging interface 12 of the device, and the super capacitor directly charges the storage battery of the electric automobile with insufficient electric quantity through the bidirectional DC-DC converter 15; for the electric automobile with insufficient electric quantity and a wireless charger, a wireless charging mode is adopted, a wireless charging and discharging interface of the device is connected to a wireless charging interface of the electric automobile, a coil position control device 131 is utilized to adjust a transmitting and receiving coil Ls to be aligned with a receiving coil of the electric automobile with insufficient electric quantity, a super capacitor generates high-frequency current through a bidirectional DC-DC converter 15 and a bridge type bidirectional rectifier 14, an alternating magnetic field is transmitted, the receiving coil in the electric automobile wireless charger with insufficient electric quantity generates electromagnetic induction to obtain high-frequency voltage, and the high-frequency voltage is charged for a storage battery of the electric automobile with insufficient electric quantity through the bridge type bidirectional rectifier 14 and the bidirectional DC-DC converter 15.
Further description is made with reference to fig. 3 to 5:
charging method 1 of the device: nearby power supplies are alternating current charging piles (stations), a change-over switch A of the device is switched to a wired alternating current charging and discharging interface 11 (B in figure 3), and change-over switches D and D 'are respectively switched to positions E and E'. The four full-control devices S1-S4 form a bridge rectifier circuit, the two full-control devices S5-S6 form a bidirectional Buck/Boost type DC-DC conversion circuit, and the full-control devices are IGBTs. The alternating current S is rectified by S1-S4 to obtain direct current Ud, and a capacitor C is used for filtering. And the direct current voltage Ud is subjected to DC-DC conversion to obtain charging voltage and current meeting the requirements of the super capacitor. The SOC of the super capacitor is approximately in direct proportion to the voltage, when the electric quantity of the super capacitor is small, the voltage is low, and the super capacitor is charged in a constant current mode. When the electric quantity of the super capacitor is larger, the voltage is also higher, and the super capacitor is charged in a constant voltage mode. Constant-current and constant-voltage charging of the super capacitor is respectively realized by controlling the on-off duty ratios of S1-S4 and S5-S6 through the control circuit 17.
Charging method 2 of the device: the device is characterized in that a nearby power supply is a wireless charging pile (station) or a wireless charging electric automobile, a change-over switch A of the device is switched to a wireless charging and discharging interface C, and change-over switches D and D 'are respectively switched to positions E and E'; a transmitting coil of a wireless charging pile or a wireless charging electrified electric automobile emits a high-frequency electromagnetic field, a transmitting and receiving coil Ls of the device induces high-frequency voltage, and the high-frequency voltage is rectified through S1-S4 and subjected to Buck type DC-DC conversion through S5-S6, so that proper charging voltage and current are provided for the super capacitor. The wireless charging and discharging circuit 13 is composed of a transmitting and receiving coil Ls, a compensation inductor Lk, a compensation capacitor Cs and normally open switches 1, 2 and 3 (adopting relays), and is used for controlling topology switching of the wireless charging and discharging circuit 13. According to the characteristic that the residual capacity (SOC) of the super capacitor is approximately in direct proportion to the voltage, the voltage of the super capacitor is detected, if the voltage is lower than the set voltage, the relays 1 and 2 are closed, the relay 3 is opened, at the moment, the system is in an LCL topology and enters a constant current charging mode, and constant current charging is carried out on the super capacitor. The voltage of the super capacitor is gradually increased along with the increase of the charging time, when the voltage of the super capacitor is detected to be increased to a set voltage, the relays 1 and 2 are switched off, the relay 3 is switched on, at the moment, the system is in an S topology and enters a constant voltage charging stage, and constant voltage charging is carried out on the super capacitor until the charging is finished.
Charging method 3 of the device: nearby power supplies are direct current charging piles (stations) or immovable storage batteries, function change-over switches D and D 'of the device are respectively switched to positions of direct current charging piles (stations) or immovable storage battery interfaces F and F', a control circuit 17 controls on-off duty ratios of two full-control devices S5 and S6 in a Buck type DC-DC conversion circuit, charging voltage and current meeting the requirements of a super capacitor Sc are obtained, and the super capacitor is rapidly charged.
The control of the charging voltage and the current of the device is as follows: when the super capacitor is charged, the full control devices S5 and S6 form a bidirectional Buck/Boost type DC-DC conversion circuit to work in a Buck circuit, namely, Buck chopperAn electrical circuit. During the charging process, S5 is turned on, S6 is turned off, and the current direction in the line passes through D-S5-Lc-Sc-D', so as to charge the super capacitor, as shown in FIG. 4 (a). During charging, S5 is firstly conducted, the charging current is gradually increased, after a period of charging, S5 turns off D6 and conducts, the current direction in the line passes through D6-Lc-Sc, and the charging current is gradually reduced, as shown in FIG. 4 (b). In a charging period, the on time of S5 is ton, the off time is toff, the average value Usc of the charging voltage of the super capacitor with the direct current link voltage Ud (namely DD' voltage) is USC＝Udton/(ton+toff)＝αUd，α＝ton/(ton+toff) The duty cycle value is less than 1. Fig. 3 and 4 show that, for an ac charging power supply (connected to the B interface) or a wireless charging power supply (connected to the C interface), the magnitude of the DC link voltage Ud can be controlled by controlling the duty ratio of the rectifier S1-S4, and then the magnitude of the charging voltage and the charging current for the super capacitor Sc can be controlled by controlling the duty ratio of the DC-DC converter S5-S6. For a DC charging power supply (connected to FF' interface), the magnitude of the charging voltage and charging current to the supercapacitor Sc can be controlled by controlling the S5-S6 duty cycle.
The device treats the quick charge (i.e. the super capacitor of the device discharges) mode 1 of the electric automobile to be charged: the electric automobile to be charged is provided with a vehicle-mounted charger, the vehicle-mounted charger is connected to a B position of a wired alternating current charging and discharging interface (shown as B in an attached figure 3), a change-over switch A is switched to the B position, and change-over switches D and D 'are respectively switched to an E position and an E' position. The charged voltage of the super capacitor Sc passes through a Boost type DC-DC conversion circuit and an S1-S4 bridge type inverter circuit, 220V and 50Hz alternating current which is the same as the commercial power is provided for a vehicle-mounted charger, and the electric vehicle with insufficient electric quantity is charged.
The device treats the quick charge (i.e. the super capacitor of the device discharges) mode 2 of the electric automobile to be charged: the electric automobile to be charged is only suitable for charging the direct current charging pile under the normal condition, the interface F of the device is connected with the charging interface of the electric automobile to be charged, and the change-over switches D and D 'are respectively switched to the positions F and F'. And charging the electric automobile to be charged by the charged voltage of the super capacitor Sc through a Boost type DC-DC conversion circuit.
This device is to electric automobile quick charge (this device ultracapacitor system discharges promptly) mode 3 that electric quantity is not enough: the electric automobile to be charged is in a wireless charging mode, a change-over switch A of the device is switched to a position C of a wireless charging and discharging interface, and change-over switches D and D 'are respectively switched to positions E and E'. And adjusting and aligning the transmitting and receiving coil Ls and the receiving coil of the electric automobile to be charged by using a stepping motor and a screw rod in the coil position control device. The charged Sc voltage of the super capacitor is subjected to Boost type DC-DC conversion formed by bidirectional S5-S6 and an inverter circuit formed by S1-S4 to obtain high-frequency alternating current, a high-frequency magnetic field is emitted by the resonant network and the transmitting coil, a wireless receiving coil of the electric automobile to be charged induces high-frequency voltage, and the high-frequency voltage is rectified by the receiving end to charge the electric automobile with insufficient electric quantity. The relays 1 and 2 are closed, the relay 3 is opened, and the transmitting end is in a constant current mode of LCL topology.
The device controls the discharge voltage and the current: when the electric automobile with insufficient electric quantity is charged, the super capacitor discharges. During the discharging process, S5 is turned off, and S6 is turned on. When the S6 is turned off, the current passes through the path D' -Sc-Lc-D5-D to charge the electric automobile to be charged, and the charging current is Isc, as shown in FIG. 5 (a). When S6 is conducted, the current path is Sc-Lc-S6, the inductor Lc stores energy, and the discharge current in the line is Isc, as shown in FIG. 5 (b). When the line is in a steady state, the energy absorbed by the inductor Lc and the energy released by the inductor Lc in one period are equal, the on-time of S6 is recorded as ton, the off-time of S6 is toff, and the obtained discharge voltage is: u shapeD＝USC(ton+toff)/toff＝USC/(1-. alpha.), the output value U of the voltageDAnd the voltage is greater than the voltage Usc on two sides of the super capacitor, and the bidirectional DC-DC converter 15 works in a Boost state. Fig. 3 and 5 show that, for the electric vehicle to be charged, the vehicle-mounted charger (connected to the interface B) or the wireless charger (connected to the interface C) is provided, and the direct-current link voltage U can be controlled by controlling the duty ratio of the DC-DC converters S5-S6DThe discharge voltage sum of the super capacitor Sc can be controlled by controlling the duty ratio of the inverters S1-S4And (4) current, namely charging voltage and current for controlling the electric automobile to be charged. For the electric vehicle to be charged (connected to an FF' interface) which is only suitable for charging the direct current charging pile, the discharge voltage UD of the super capacitor Sc can be controlled by controlling the duty ratio of the DC-DC converters S5-S6, namely the charging voltage and the charging current of the electric vehicle to be charged are controlled.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a portable emergent charge-discharge device of electric automobile which characterized in that: the wireless charging and discharging device comprises a wired alternating current charging and discharging interface (11) connected with an alternating current power supply, a wired direct current charging and discharging interface (12) connected with a direct current power supply and a wireless charging and discharging circuit (13) capable of being charged wirelessly, wherein the wireless charging and discharging circuit (13) comprises a wireless charging and discharging interface;
the system also comprises a control circuit (17), and a bridge type bidirectional rectifier (14), a bidirectional DC-DC converter (15) and a super capacitor bank (16) which are respectively connected with the control circuit (17);
the wired alternating current charging and discharging interface (11) and the wireless charging and discharging circuit (13) are connected with a bridge type bidirectional rectifier (14), the bridge type bidirectional rectifier (14) is connected with a bidirectional DC-DC converter (15), the bidirectional DC-DC converter (15) is connected with a super capacitor bank (16), the wired direct current charging and discharging interface (12) is connected with the bidirectional DC-DC converter (15), and the control circuit (17) is further connected with the wireless charging and discharging circuit (13).
2. The portable emergency charging and discharging device for the electric automobile according to claim 1, wherein: the bridge type bidirectional rectifier (14) is composed of four rectifying arms, each rectifying arm is composed of a full-control device IGBT and an anti-parallel diode, and the control circuit (17) is connected with the four rectifying arms and controls the on-off and current flow direction of the four rectifying arms.
3. The portable emergency charging and discharging device for the electric automobile according to claim 1, wherein: the bidirectional DC-DC converter (15) is a bidirectional Buck/boost type bidirectional DC-DC converter composed of a full-control device IGBT and an anti-parallel diode.
4. The portable emergency charging and discharging device for the electric automobile according to claim 1, wherein: the super capacitor bank (16) comprises a group of super capacitors, and the super capacitors are connected in series with an inductor Lc for reducing the charging interference caused by current fluctuation.
5. The portable emergency charging and discharging device for the electric automobile according to claim 1, wherein: the wireless charging and discharging circuit (13) comprises a transmitting and receiving coil Ls, a compensation inductor Lk, a compensation capacitor Cs, a relay 1, a relay 2 and a relay 3, wherein the relay 1, the relay 2 and the relay 3 are used for controlling the topology switching of the wireless charging and discharging circuit (13), so that the charging switching of the super capacitor bank (16) in different modes is carried out.
6. The portable emergency charging and discharging device for the electric automobile according to claim 5, wherein: the wireless charging and discharging circuit (13) further comprises a coil position control device (131) used for adjusting the positions of the transmitting and receiving coil Ls and the transmitting and receiving coil to be charged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020753696.6U CN212708980U (en) | 2020-05-09 | 2020-05-09 | Portable emergency charging and discharging device for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020753696.6U CN212708980U (en) | 2020-05-09 | 2020-05-09 | Portable emergency charging and discharging device for electric automobile |
Publications (1)
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| CN118282008A (en) * | 2024-05-31 | 2024-07-02 | 深圳市特瑞华腾新能源有限公司 | Multifunctional vehicle-mounted charging circuit of electric automobile |
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