CN221137680U - Charging device - Google Patents
Charging device Download PDFInfo
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- CN221137680U CN221137680U CN202323211878.3U CN202323211878U CN221137680U CN 221137680 U CN221137680 U CN 221137680U CN 202323211878 U CN202323211878 U CN 202323211878U CN 221137680 U CN221137680 U CN 221137680U
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Abstract
The application provides a charging device, which comprises a bidirectional AC/DC converter, a bidirectional DC/DC converter, a direct current bus, an alternating current bus, an auxiliary power supply and a load interface, wherein the bidirectional AC/DC converter is connected with the auxiliary power supply; the first end of the bidirectional DC/DC converter is used for being electrically connected with the charging equipment, and the second end of the bidirectional DC/DC converter is electrically connected to the direct current bus; the direct current end of the bidirectional AC/DC converter is electrically connected to a direct current bus, the alternating current end of the bidirectional AC/DC converter is electrically connected to an alternating current bus, and the alternating current bus is used for being electrically connected with a power supply bus; the auxiliary power supply is electrically connected with the direct current bus; the first end of the load interface is electrically connected with the direct current bus or the alternating current bus, and the second end of the load interface is used for being electrically connected with the load. According to the application, the auxiliary power supply is connected with the direct current bus, so that the charging device can still be connected with the charging equipment when the power supply bus is not connected, and the problem that the charging device cannot work when the power supply bus is not connected in the prior art is solved.
Description
Technical Field
The application relates to the technical field of charging, in particular to a charging device.
Background
The invention of the fuel-type automobile indeed improves the problems of convenience and cargo transportation in human activities, and with the progress of manufacturing technology, the fuel-type automobile is mass-produced, and nowadays the fuel-type automobile has become one of the indispensable tools in human life. However, the supply and demand relation and price of petroleum price cause the use cost of automobiles to be higher and higher. Therefore, various countries are actively encouraged to develop new energy automobiles to change the energy structure and reduce the dependence on petroleum, and the new energy automobiles use electric energy as power, so that attention is paid.
In the charging system, when a new energy automobile charging device (EVSE) is in charging connection with an electric automobile (EV) according to the requirements of corresponding charging standards, corresponding protocol handshaking, insulation detection and other actions are needed to be carried out after physical connection is completed, and after port voltage required by the EV is successfully connected and established, the EVSE takes electricity from a power grid to charge the EV.
In the prior art, the charging device is supplied with power from the power grid side when running, and the charging device cannot work when no ac source is supplied.
Disclosure of utility model
The application provides a charging device which is used for solving the problem that the charging device cannot work when no alternating current source is supplied.
The application provides a charging device, which comprises a bidirectional AC/DC converter, a bidirectional DC/DC converter, a direct current bus, an alternating current bus, an auxiliary power supply and a load interface, wherein the bidirectional AC/DC converter is connected with the auxiliary power supply;
The first end of the bidirectional DC/DC converter is electrically connected with the charging equipment, and the second end of the bidirectional DC/DC converter is electrically connected to the direct current bus;
the direct current end of the bidirectional AC/DC converter is electrically connected to the direct current bus, and the alternating current end of the bidirectional AC/DC converter is electrically connected to the alternating current bus and is used for being electrically connected with the power supply bus;
The auxiliary power supply is electrically connected with the direct current bus;
The first end of the load interface is electrically connected with the direct current bus or the alternating current bus, and the second end of the load interface is used for being electrically connected with the load.
In one embodiment, the charging device further includes a first combination switch, a second combination switch, and a control unit;
The first end of the first combined switch is electrically connected with the charging equipment, and the second end of the first combined switch is electrically connected with the bidirectional DC/DC converter;
The first end of the second combined switch is electrically connected with the bidirectional AC/DC converter through an alternating current bus, and the second end of the second combined switch is electrically connected with the power supply bus; when the power supply bus is not connected and the charging equipment is connected, the second combined switch is disconnected, the control unit is used for calling the auxiliary power supply to discharge to the second end of the first combined switch so as to establish the port voltage between the second end of the first combined switch and the first end of the first combined switch, and the first combined switch is closed; discharging from auxiliary power supply to charging apparatus, or
Discharge to the load interface by at least one of the charging device and the auxiliary power source.
In one embodiment, when the power supply bus is accessed, the second combined switch is closed, and at least one of the auxiliary power supply and the power supply bus discharges to the charging equipment,
Or by at least one of an auxiliary power source or a charging device to the power bus.
In one embodiment, the auxiliary power source comprises at least one of a battery and a photovoltaic array.
In one embodiment, the auxiliary power supply is a photovoltaic array, the second combination switch is turned off when the power supply bus is not connected, the photovoltaic array discharges to at least one of the charging device and the load interface,
Or by at least one of a charging device and a photovoltaic array to a load interface.
In one embodiment, when the power supply bus is connected, the second combined switch is closed, at least one of the power supply bus and the photovoltaic array discharges to the charging equipment,
Or discharging the power supply bus by at least one of the charging device and the photovoltaic array.
In one embodiment, the auxiliary power supply is a battery, when the power supply bus is not accessed, the second combination switch is disconnected, the battery discharges to the charging equipment,
Or by at least one of the charging device and the battery to the load interface.
In one embodiment, when the power supply bus is connected, the second combined switch is closed, at least one of the power supply bus and the battery discharges to the charging equipment,
Or at least one of the battery and the charging device by the power supply bus,
Or by at least one of the battery and the charging device to the power supply bus.
In one embodiment, the battery comprises at least one of a high voltage battery and a low voltage battery, the high voltage battery being electrically connected to the dc bus;
the low-voltage battery is electrically connected with the direct-current bus through a bidirectional DC/DC converter.
The application provides a charging device, which comprises a bidirectional AC/DC converter, a bidirectional DC/DC converter, a direct current bus, an alternating current bus, an auxiliary power supply and a load interface, wherein the bidirectional AC/DC converter is connected with the auxiliary power supply; the first end of the bidirectional DC/DC converter is electrically connected with the charging equipment, and the second end of the bidirectional DC/DC converter is electrically connected to the direct current bus; the direct current end of the bidirectional AC/DC converter is electrically connected to the direct current bus, and the alternating current end of the bidirectional AC/DC converter is electrically connected to the alternating current bus and is used for being electrically connected with the power supply bus; the auxiliary power supply is electrically connected with the direct current bus; the first end of the load interface is electrically connected with the direct current bus or the alternating current bus, and the second end of the load interface is used for being electrically connected with the load. According to the application, the auxiliary power supply is connected with the direct current bus, so that the charging device can still be connected with the charging equipment when the power supply bus is not connected, and the problem that the charging device cannot work when the power supply bus is not connected in the prior art is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of a charging device for a new energy automobile in the prior art;
Fig. 2 is a schematic structural diagram of a charging device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a charging device according to an embodiment of the present application;
Fig. 4 is a schematic structural diagram of an auxiliary power supply according to an embodiment of the application.
Reference numerals:
A charging device: 100; bidirectional AC/DC converter: 101; bidirectional DC/DC converter: 102, a step of; direct current bus: 103; auxiliary power supply: 110; load interface: 104; an alternating current bus: 105; charging equipment: 120; a power supply bus: 130; a first combination switch: 201; and a second combination switch: 202; photovoltaic array: 112; a battery: 111.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
In the charging system, when a new energy automobile charging device (EVSE) is in charging connection with an electric automobile (EV) according to the requirements of corresponding charging standards, corresponding protocol handshaking, insulation detection and other actions are needed to be carried out after physical connection is completed, and after port voltage required by the EV is successfully connected and established, the EVSE takes electricity from a power grid to charge the EV.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a charging device in the prior art, where the charging device includes a bidirectional DC/DC converter, a bidirectional AC/DC converter, a DC bus, a DC EMI filter, and an AC EMI filter, where one end of the AC EMI filter is connected to a power supply bus, the other end of the AC EMI filter is connected to the bidirectional AC/DC converter, the bidirectional AC/DC converter is connected to the bidirectional DC/DC converter through the DC bus, and the other end of the bidirectional DC/DC converter is connected to a charging apparatus. The charging device charges the charging equipment by taking electricity through the power supply bus, when the charging equipment is accessed, the port voltage of the charging device can be established by taking electricity from the power supply bus, but when the power supply bus is not used for supplying electricity, the port voltage of the charging device cannot be established, the charging device and the charging equipment cannot be in butt joint, so that the charging device cannot be started, the charging equipment cannot be charged and cannot transmit electricity to the charging device, and the use mode of the charging device is greatly limited.
Accordingly, based on the above-described problems, the present application provides a charging device, as shown in fig. 2, the charging device 100 includes a bidirectional AC/DC converter 101, a bidirectional DC/DC converter 102, a direct current bus 103, an alternating current bus 105, an auxiliary power supply 110, and a load interface 104;
A first end of the bidirectional DC/DC converter 102 is electrically connected to the charging device 120, and a second end of the bidirectional DC/DC converter 102 is electrically connected to the direct current bus 103;
the DC end of the bi-directional AC/DC converter 101 is electrically connected to the DC bus 103, and the AC end of the bi-directional AC/DC converter 101 is electrically connected to the AC bus 105 for electrical connection with the power supply bus 130;
The auxiliary power supply 110 is electrically connected with the direct current bus 103;
The first end of the load interface 104 is electrically connected to the dc bus 103 or the ac bus 105, and the second end of the load interface 104 is electrically connected to a load (not shown). The load interface is used for connecting other loads and providing power for the other loads. Specifically, when the load interface 104 is electrically connected to the dc bus 103, the load capable of supplying power is a dc load; when the load interface 104 is electrically connected to the ac bus 105, the load to which power can be supplied is an ac load. Therefore, the charging device 100 provided by the application can supply power for both a direct current load and an alternating current load.
According to the application, the auxiliary power supply 110 is electrically connected with the direct current bus 103, when the power supply bus 130 is not connected with alternating current or the power supply bus 130 is not connected, the charging device 100 can take electricity from the auxiliary power supply 110 to establish port voltage, so that the electrical connection between the charging device 100 and the charging equipment 120 is completed, the charging device 100 can charge the charging equipment 120 or take electricity from the charging equipment 120, and the use modes of the charging device 100 are enriched.
In one embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of a charging device 100 according to an embodiment of the present application, where the charging device 100 further includes a first combination switch 201, a second combination switch 202, and a control unit (not shown in the drawings);
A first end of the first combination switch 201 is electrically connected to the charging device 120, and a second end of the first combination switch 201 is electrically connected to the bidirectional DC/DC converter 102;
The first end of the second combined switch 202 is electrically connected with the bidirectional AC/DC converter 101 through the AC bus 105, and the second end of the second combined switch 202 is electrically connected with the power supply bus 130; when the power supply bus 130 is not connected and when the charging device 120 is connected, the second combination switch 202 is opened, the control unit is used for calling the auxiliary power supply 110 to discharge to the second end of the first combination switch 201 so as to establish a port voltage between the second end of the first combination switch 201 and the first end of the first combination switch 201, and the first combination switch 201 is closed; discharging the charging device 120 by the auxiliary power supply 110, or
Discharge to the load interface 104 by at least one of the charging device 120 and the auxiliary power source 110.
Specifically, the first combination switch 201 includes a switch L1, a switch L2, a switch L3, and a precharge resistor R1, when the charging device 120 is connected, a handshake protocol and insulation detection are firstly completed between a first end (charging device) of the first combination switch 201 and a second end (charging device) of the first combination switch 201, the control unit invokes the auxiliary power supply 110 to discharge to the second end of the first combination switch 201, and establishes a port voltage between the second end of the first combination switch 201 and the first end of the first combination switch 201, that is, the port voltage required by the auxiliary power supply 110 to discharge to establish an electrical connection between the charging device and the charging device is established, after the port voltage is established, the first combination switch 201 is closed, that is, the switch L2 and the switch L3 are firstly precharged, after the precharge is completed, the switch L1 is closed, at this time, the charging device starts to operate, and the charging device starts to take electricity from or discharge to the charging device. Optionally, the auxiliary power supply 110 discharges to the charging device; at least one of the charging device 120 and the auxiliary power source 110 discharges to the load interface 104.
The second combination switch 202 includes a switch L4, a switch L5, a switch L6, and a switch L7, a precharge resistor R2, and a precharge resistor R3. Alternatively, the precharge resistor R2 and the precharge resistor R3 may be removed, which may simplify the circuit and save space.
In one embodiment, when the power bus 130 is accessed, the second combination switch 202 is closed, discharged by at least one of the auxiliary power source 110 and the power bus 130 to the charging device 120,
Or discharged by at least one of the auxiliary power supply 110 or the charging device 120 to the power supply bus 130.
Specifically, when the power supply bus 130 is accessed, the second combination switch 202 is closed, that is, the switch L4 and the switch L7 are closed for pre-charging, and after the pre-charging is finished, the switch L5 and the switch L6 are closed. At this time, if a charging instruction is received, the auxiliary power supply 110 and the power supply bus 130 can both supply power to the charging device 120; if there is no charging instruction, both the charging device 120 and the auxiliary power supply 110 may discharge the feeder to the power bus 130.
In one embodiment, as shown in fig. 4, fig. 4 is a schematic structural diagram of an auxiliary power supply 110 according to an embodiment of the application. The auxiliary power supply 110 includes at least one of a battery 111 and a photovoltaic array 112.
Specifically, if the auxiliary power source 110 is a photovoltaic array 112, the photovoltaic array 112 is connected to the DC bus 103 through a PV filter and a DC/DC converter.
In one embodiment, the auxiliary power source 110 is a photovoltaic array 112, and when the power bus 130 is not accessed, the second combination switch 202 is opened, discharge from the photovoltaic array 112 to at least one of the charging device 120 and the load interface 104,
Or discharged by at least one of the charging device 120 and the photovoltaic array 112 to the load interface 104.
At this time, the power supply bus 130 is not connected, the second combination switch 202 is turned off, the charging device 120 and the charging apparatus 100 complete the port voltage establishment, and there are two situations at this time, the first is that the electric energy in the photovoltaic array 112 discharges to the charging device 120 and/or the load interface 104 through the dc bus; the second is that the electrical energy in the photovoltaic array 112 or the charging device 120 is discharged to the load interface 104.
In one embodiment, when the power bus 130 is accessed, the second combination switch 202 is closed, and at least one of the power bus 130 and the photovoltaic array 112 discharges to the charging device 120, or at least one of the charging device 120 and the photovoltaic array 112 discharges to the power bus 130.
Specifically, when the power supply bus 130 is accessed, the second combination switch 202 is closed, the charging device 120 is also accessed, the first combination switch 201 is closed, and the port voltage establishment with the charging device 120 is completed, at this time, at least one of the power supply bus 130 and the photovoltaic array 112 discharges to the charging device 120, or at least one of the charging device 120 and the photovoltaic array 112 discharges to the power supply bus 130.
In one embodiment, as shown in fig. 2 and 3, the auxiliary power source 110 is a battery 111, and when the power supply bus 130 is not connected, the second combination switch 202 is turned off, and the battery 111 discharges to the charging device 120,
Or discharged by at least one of the charging device 120 and the battery 111 to the load interface 104.
In one embodiment, when power supply bus 130 is accessed, second combination switch 202 is closed, discharging from at least one of power supply bus 130 and battery 111 to charging device 120,
Or at least one of the battery 111 and the charging device 120 is discharged by the power supply bus 130,
Or discharged by at least one of the battery 111 and the charging device 120 to the power supply bus 130.
Specifically, when the power supply bus 130 is accessed, the power supply source of the charging device 120 is the battery 111 and the power supply bus 130; the power supply sources of the load interface 104 are a charging device 120, a battery 111 and a power supply bus 140; the power supply source of the battery 111 is a power supply bus 130 and a charging device 120. The power supply bus 130 may also store electrical energy for charging the battery 111, and may be powered by electrical energy stored in the battery 111 when needed.
When the power supply bus 130 is not connected, the power supply source of the charging device 120 is the battery 111; the power source of the load interface 104 is a charging device 120 and a battery 111.
In one embodiment, the battery 111 comprises at least one of a high voltage battery and a low voltage battery, the high voltage battery being electrically connected to the dc bus 103;
the battery is electrically connected to the DC bus 103 via a bi-directional DC/DC converter.
If the auxiliary power supply 110 is a high-voltage battery, the DC bus 103 may be directly connected to the high-voltage battery, but if the auxiliary power supply 110 is a low-voltage battery, the DC bus 103 may not be directly connected to the high-voltage battery, and it is necessary to electrically connect to the DC bus 103 through a DC/DC converter, so as to prevent the burning out of the high-voltage battery.
Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (9)
1. The charging device is characterized by comprising a bidirectional AC/DC converter, a bidirectional DC/DC converter, a direct current bus, an alternating current bus, an auxiliary power supply and a load interface;
a first end of the bidirectional DC/DC converter is electrically connected with a charging device, and a second end of the bidirectional DC/DC converter is electrically connected to the direct current bus;
The direct current end of the bidirectional AC/DC converter is electrically connected to the direct current bus, the alternating current end of the bidirectional AC/DC converter is electrically connected to the alternating current bus, and the alternating current bus is used for being electrically connected with a power supply bus;
the auxiliary power supply is electrically connected with the direct current bus;
The first end of the load interface is electrically connected with the direct current bus or the alternating current bus, and the second end of the load interface is used for being electrically connected with a load.
2. The charging device according to claim 1, wherein,
The charging device further comprises a first combined switch, a second combined switch and a control unit;
A first end of the first combined switch is electrically connected with the charging equipment, and a second end of the first combined switch is electrically connected with the bidirectional DC/DC converter;
The first end of the second combined switch is electrically connected with the bidirectional AC/DC converter through the alternating current bus, and the second end of the second combined switch is electrically connected with the power supply bus; when the power supply bus is not accessed and the charging equipment is accessed, the second combined switch is opened, the control unit is used for calling the auxiliary power supply to discharge to the second end of the first combined switch so as to establish the port voltage between the second end of the first combined switch and the first end of the first combined switch, and the first combined switch is closed; discharging from the auxiliary power supply to the charging device, or
Discharging by at least one of the charging device and the auxiliary power source to the load interface.
3. The charging apparatus according to claim 2, wherein the second combination switch is closed when the power supply bus is connected, and the charging device is discharged by at least one of the auxiliary power supply and the power supply bus,
Or discharging the power supply bus by at least one of the auxiliary power supply or the charging device.
4. A charging device according to any of claims 1-3, wherein the auxiliary power source comprises at least one of a battery and a photovoltaic array.
5. The charging apparatus of claim 4, wherein the auxiliary power source is a photovoltaic array, the second combination switch is turned off when the power bus is not accessed, the photovoltaic array discharges at least one of the charging device and the load interface,
Or discharging by at least one of the charging device and the photovoltaic array to the load interface.
6. The charging apparatus according to claim 5, wherein when the power supply bus is connected, the second combination switch is closed, at least one of the power supply bus and the photovoltaic array discharges to the charging device,
Or discharging the power supply bus by at least one of the charging device and the photovoltaic array.
7. The charging apparatus according to claim 4, wherein the auxiliary power source is a battery, the second combination switch is turned off when the power supply bus is not connected, the battery discharges to the charging device,
Or discharged by at least one of the charging device and the battery to the load interface.
8. The charging apparatus according to claim 7, wherein when the power supply bus is connected, the second combination switch is closed, and at least one of the power supply bus and the battery discharges to the charging device,
Or at least one of the battery and the charging device is discharged from the power supply bus,
Or discharging the power supply bus by at least one of the battery and the charging device.
9. The charging device of claim 4, wherein the battery comprises at least one of a high voltage battery and a low voltage battery, the high voltage battery being electrically connected to the dc bus;
The low-voltage battery is electrically connected with the direct current bus through a bidirectional DC/DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323211878.3U CN221137680U (en) | 2023-11-27 | 2023-11-27 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323211878.3U CN221137680U (en) | 2023-11-27 | 2023-11-27 | Charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221137680U true CN221137680U (en) | 2024-06-14 |
Family
ID=91390462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323211878.3U Active CN221137680U (en) | 2023-11-27 | 2023-11-27 | Charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221137680U (en) |
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2023
- 2023-11-27 CN CN202323211878.3U patent/CN221137680U/en active Active
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