CN222464200U - Charging and discharging system and charging device - Google Patents
Charging and discharging system and charging device Download PDFInfo
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- CN222464200U CN222464200U CN202420848552.7U CN202420848552U CN222464200U CN 222464200 U CN222464200 U CN 222464200U CN 202420848552 U CN202420848552 U CN 202420848552U CN 222464200 U CN222464200 U CN 222464200U
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Abstract
本实用新型涉及一种充放电系统和充电装置。根据本实用新型的系统，该系统包括充电电路，所述充电电路的第一端与所述系统的母线连接，所述充电电路的第二端与所述系统的电池连接端连接；放电电路，所述放电电路的第一端与所述系统的母线连接，所述放电电路的第二端与所述系统的负载连接端连接；其中，所述充电电路和所述放电电路复用部分整流器件。可以解决系统中交流充电电路和电机驱动电路难以集成的问题，有效降低成本和体积。
The utility model relates to a charging and discharging system and a charging device. According to the system of the utility model, the system includes a charging circuit, the first end of which is connected to the busbar of the system, and the second end of which is connected to the battery connection end of the system; a discharging circuit, the first end of which is connected to the busbar of the system, and the second end of which is connected to the load connection end of the system; wherein the charging circuit and the discharging circuit reuse some rectifier devices. The problem that the AC charging circuit and the motor drive circuit in the system are difficult to integrate can be solved, and the cost and volume can be effectively reduced.
Description
Technical Field
The utility model relates to the technical field of equipment charging, in particular to a charging and discharging system and a charging device.
Background
With the rapid development of charging technology and battery technology, the charging power required by load devices is increasing. At present, in order to boost charging power, the power grid can supply power to load equipment through a power grid discharging circuit, and the power grid is supplemented through an energy storage battery, but the power grid discharging circuit and a battery charging circuit are mutually independent circuits and are difficult to integrate.
Disclosure of utility model
Embodiments of the present disclosure provide a charge and discharge system and a charging device that can reduce cost and volume.
According to a first aspect of the present utility model, there is provided a charge control system comprising:
The first end of the charging circuit is connected with a bus of the system, and the second end of the charging circuit is connected with a battery connecting end of the system;
The first end of the discharging circuit is connected with a bus of the system, and the second end of the discharging circuit is connected with a load connecting end of the system;
wherein the charging circuit and the discharging circuit multiplex part of the rectifying device.
Optionally, the charging circuit comprises a first direct current conversion circuit and an alternating current-direct current conversion circuit, wherein a first end of the alternating current-direct current conversion circuit is connected with a bus of the system, a second end of the alternating current-direct current conversion circuit is connected with a first end of the first direct current conversion circuit, and a second end of the first direct current conversion circuit is connected with an energy storage battery;
The charging circuit and the discharging circuit multiplex part of rectifying devices comprise the charging circuit and the discharging circuit multiplex the alternating current-direct current conversion circuit.
Optionally, the charging circuit further includes a first switch, a first end of the first switch is connected to a second end of the ac/dc conversion circuit, and a second end of the first switch is connected to the first dc conversion circuit;
When the first switch is turned off, the discharging circuit converts the first alternating current output by the bus into second direct current and outputs the second direct current to the load equipment.
Optionally, the plurality of first dc conversion circuits are provided, the first ends of the different first dc conversion circuits are connected with the second ends of the ac/dc conversion circuits, and the second ends of the different first dc conversion circuits are connected with the different energy storage batteries;
The first switches are multiple, the first ends of the different first switches are connected with the second ends of the alternating current-direct current conversion circuits, and the different first switches are connected with the first ends of the corresponding first direct current conversion circuits.
Optionally, the discharging circuit further includes a second dc conversion circuit, a first end of the second dc conversion circuit is connected to a second end of the ac-dc conversion circuit, and a second end of the second dc conversion circuit is connected to a load connection end of the system.
Optionally, the system further comprises a second switch, a first end of the second switch is connected with a first end of the first direct current conversion circuit, and a second end of the second switch is connected with a second end of the second direct current conversion circuit;
when the second switch is closed, the first direct current conversion circuit outputs third direct current output by the battery connection end of the system to the load connection end of the system.
Optionally, the plurality of second dc conversion circuits are provided, the first ends of the different second dc conversion circuits are connected with the second ends of the ac/dc conversion circuits, and the second ends of the different second dc conversion circuits are connected with the load connection ends of different systems;
The first ends of the different second switches are connected with the first ends of the first direct current conversion circuits, and the different second switches are connected with the second ends of the corresponding second direct current conversion circuits.
Optionally, the plurality of first dc conversion circuits are provided, the first ends of the different first dc conversion circuits are connected with the second ends of the ac/dc conversion circuits, and the second ends of the different first dc conversion circuits are connected with the battery connection ends of different systems;
The system further comprises a third switch connected between the second ends of the adjacent second direct current conversion circuits;
When the first battery connection end of the system discharges to the first load connection end of the system, a second switch corresponding to the first battery connection end of the system is closed, and a third switch between a second direct current conversion circuit corresponding to the first battery connection end of the system and a second direct current conversion circuit corresponding to the first load connection end of the system is closed, wherein the battery connection end of the system comprises a first battery connection end, and the load connection end of the system comprises a first load connection end.
According to a second aspect of the present utility model, there is provided a charging device comprising an auxiliary power supply battery and the charging and discharging system as described in the first aspect;
The auxiliary power supply battery is connected with the battery connecting end of the charging and discharging system, and the load connecting end of the charging and discharging system is connected with load equipment.
Optionally, the system further comprises a power supply system, wherein the output end of the power supply system is connected with a bus of the charging and discharging system, and the power supply system supplies power for the auxiliary power supply battery or the load equipment.
Optionally, the power supply system comprises a transformer, an ac-dc converter and a photovoltaic module;
The first end of the transformer is connected with a power grid, the second end of the transformer is used as an output end of the power supply system, the first end of the alternating current-direct current converter is connected with the photovoltaic module, and the second end of the alternating current-direct current converter is used as an output end of the power supply system.
The charging circuit can convert the first alternating current output by the bus of the system into the first direct current to charge the energy storage battery, the discharging circuit can convert the first alternating current output by the bus of the system into the second direct current to supply power to the load equipment, and the charging circuit and the discharging circuit multiplex part of the rectifying devices, so that the charging circuit and the discharging circuit are integrated into a whole, the integration level of the charging and discharging system is improved, the volume of the charging and discharging system is reduced on one hand, and the manufacturing cost of the charging and discharging system is reduced on the other hand. The charge-discharge system of the utility model can be applied to vehicles.
Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
FIG. 1 is a block diagram of a charge-discharge system according to one embodiment;
Fig. 2 is a circuit diagram of a charge-discharge system according to another embodiment;
Fig. 3 is a circuit diagram of a charge-discharge system according to another embodiment;
fig. 4 is a circuit diagram of a charge and discharge system according to another embodiment.
The reference numerals:
The charging circuit 10, the first direct current converting circuit 11, the alternating current-direct current converting circuit 12, the discharging circuit 20, the second direct current converting circuit 21, the bus bar 30, the energy storage battery 40, the load device 50, the power grid 60, the transformer 61, the photovoltaic module 70, the alternating current-direct current converter 71 and the switching unit 80.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques and equipment known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Referring to fig. 1, a charge and discharge system according to an embodiment of the present disclosure will be described.
The charge and discharge system of the embodiment of the present disclosure includes a charge circuit 10 and a discharge circuit 20.
The first end of the charging circuit 10 is connected to a bus bar 30 of a charging/discharging system, and the second end of the charging circuit 10 is connected to a battery connection end of the charging/discharging system.
The first end of the discharging circuit 20 is connected with a bus 30 of the charging and discharging system, and the second end of the discharging circuit 20 is connected with a load connecting end of the charging and discharging system;
wherein the charging circuit 10 and the discharging circuit 20 multiplex part of the rectifying devices.
In this embodiment, the bus of the charge and discharge system may be an ac bus or a dc bus, and the following description will specifically discuss the bus 30 of the charge and discharge system as an ac bus.
In this embodiment, the battery connection terminal of the charging and discharging system may be the terminal of the energy storage battery 40 connected to the second terminal of the charging circuit 10.
In this embodiment, the load connection terminal of the charge and discharge system may be the terminal to which the second terminal of the discharge circuit 20 and the load device 50 are connected. The load device 50 is, for example, an electric vehicle, an intelligent locker, an aircraft, an electric bicycle, or the like, and is not limited thereto.
In this embodiment, the charging circuit 10 may be an ac-dc conversion circuit, and the charging circuit 10 may convert the first ac power output by the bus 30 of the charging and discharging system into the first dc power to charge the energy storage battery 40 through the second end of the charging circuit 10.
In this embodiment, the discharging circuit 20 may be an ac-dc converting circuit, and the discharging circuit 20 may convert the first ac power output by the bus 30 of the charging and discharging system into the second dc power to supply the load device 50 through the second end of the discharging circuit 20.
In other words, the charging circuit 10 may convert the first ac power output by the bus 30 of the charging and discharging system into the first dc power to charge the energy storage battery 40, the discharging circuit 20 may convert the first ac power output by the bus 30 of the charging and discharging system into the second dc power to supply power to the load device 50, and the charging circuit 10 and the discharging circuit 20 multiplex part of the rectifying devices, so that the charging circuit 10 and the discharging circuit 20 are integrated into a whole, improving the integration level of the charging and discharging system, and on one hand, reducing the volume of the charging and discharging system.
In some embodiments, the charging circuit 10 comprises a first direct current conversion circuit 11 and an alternating current-direct current conversion circuit 12, wherein a first end of the alternating current-direct current conversion circuit 12 is connected with a bus 30 of the charging and discharging system, a second end of the alternating current-direct current conversion circuit 12 is connected with a first end of the first direct current conversion circuit 11, a second end of the first direct current conversion circuit 11 is connected with the energy storage battery 40, and the charging circuit 10 and the discharging circuit 20 multiplex part of rectifying devices, and the charging circuit 10 and the discharging circuit 20 multiplex the alternating current-direct current conversion circuit 12.
In this embodiment, the first dc-dc conversion circuit 11 may be a dc-dc conversion circuit, which may be a dc boost circuit or a dc buck circuit, which is not limited herein.
In some examples, the ac-dc conversion circuit 12 may be an ac-dc conversion circuit, which may convert the first ac power output by the bus 30 of the charging and discharging system into the fourth dc power and output the fourth dc power to the first dc conversion circuit 11, and the first dc conversion circuit 11 converts the fourth dc power into the first dc power and outputs the first dc power to the energy storage battery 40. The first dc conversion circuit 11 may convert the fifth dc power output from the energy storage battery 40 into a sixth dc power, and the ac-dc conversion circuit may also convert the sixth dc power output from the first dc conversion circuit 11 into a second ac power and output the second ac power to the bus 30 of the charging and discharging system, so as to feed back the electric power to the power grid 60 or the photovoltaic module 70.
In other words, by providing the multiplexing part rectifying device as the ac/dc conversion circuit 12, on the premise of improving the operation efficiency of the ac/dc conversion circuit 12, the charging circuit 10 and the discharging circuit 20 can be integrated into one body, thereby reducing the manufacturing cost of the charging/discharging system.
In some embodiments, the discharging circuit 20 further includes a second dc conversion circuit 21, a first end of the second dc conversion circuit 21 is connected to a second end of the ac-dc conversion circuit 12, and a second end of the second dc conversion circuit 21 is connected to a load connection end of the system.
In some examples, the second dc conversion circuit 21 and the ac-dc conversion circuit 12 may constitute a charging pile of the vehicle.
In this embodiment, the second dc conversion circuit 21 may be a dc-dc conversion circuit, which may be a dc boost circuit or a dc buck circuit, which is not limited herein.
In some examples, the ac-dc conversion circuit may convert the first ac power output by the bus 30 of the charging and discharging system into a seventh dc power output to the second dc conversion circuit, and the second dc conversion circuit 21 may convert the seventh dc power into a second dc power output to the load device 50. The second dc conversion circuit 21 may also convert the eighth dc power output from the load device 50 into the ninth dc power, and the ac-dc conversion circuit may also convert the ninth dc power output from the second dc conversion circuit 21 into the third ac power and output the third ac power to the bus 30 of the charging and discharging system, so as to feed back the power to the power grid 60, the photovoltaic module 70, or the energy storage battery 40.
In other words, by the cooperation of the second dc conversion circuit 21 and the ac/dc conversion circuit 12, power supply to the load device 50 can be achieved.
In some embodiments, as shown in fig. 2, the charging circuit 10 further includes a first switch K1, a first end of the first switch K1 is connected to a second end of the ac/dc conversion circuit 12, and a second end of the first switch K1 is connected to the first dc conversion circuit 11, where when the first switch K1 is closed, the charging circuit 10 converts the first ac power output by the bus 30 into the first dc power and outputs the first dc power to the energy storage battery 40, and when the first switch K1 is opened, the discharging circuit 20 converts the first ac power output by the bus 30 into the second dc power and outputs the second dc power to the load device 50.
In other words, by setting the first switch K1, it is realized that the bus 30 of the charging and discharging system can charge the energy storage battery 40 alone, can charge the load device 50 alone, and can charge the energy storage battery 40 and the load device 50 simultaneously, which expands the functions of the charging and discharging system and further improves the utilization efficiency of the charging and discharging system.
In some embodiments, the first dc conversion circuit 11 is a plurality of different first dc conversion circuits 11, the second ends of the different first dc conversion circuits 11 are connected to the second ends of the ac/dc conversion circuits 12, the first switches are a plurality of different first switches, the first ends of the different first switches are connected to the second ends of the ac/dc conversion circuits 12, and the different first switches are connected to the first ends of the corresponding first dc conversion circuits 11.
In some examples, as shown in fig. 4, only the charging pile A1 is operated, the first switch may be the first switches Kj1 to Kjn, and the energy storage battery 40B1 supplies power to the load device 50L1 connected to the charging pile A1 through the charging circuit 10 when the first switch Kj1 is closed. When the first switches Kj1 and Kj3 are closed, the energy storage battery 40B1 and the energy storage battery 40B2 supply power to the load device 50L1 connected to the charging pile A1 through the charging circuit 10.
In other words, the charging and discharging system is configured with a plurality of battery connection terminals to connect different energy storage batteries 40, and under the cooperation of a plurality of first switches, the plurality of energy storage batteries 40 can supply power to a load device 50 at the same time, and the plurality of energy storage batteries 40 can also supply power to the load device 50 one by one, so that the functions of the charging and discharging system are further expanded, the power supply efficiency of the charging and discharging system for supplying power to the load device 50 is improved, and durable and stable direct current is provided for the load device 50.
In some embodiments, as shown in fig. 2, the charge-discharge system further includes a second switch K2, wherein a first end of the second switch K2 is connected to a first end of the first dc conversion circuit 11, and a second end of the second switch K2 is connected to a second end of the second dc conversion circuit 21, and when the second switch K2 is closed, the first dc conversion circuit 11 outputs a third dc output from a battery connection end of the charge-discharge system to a load connection end of the charge-discharge system.
In other words, by setting the second switch K2, it is realized that the energy storage battery 40 can directly supply power to the load device 50 through the first dc conversion circuit 11, so that the conversion efficiency of supplying power to the load device 50 is effectively improved, and the energy loss of the charging and discharging system is effectively reduced.
In some embodiments, the second dc conversion circuit 21 is a plurality of different second dc conversion circuits 21, the first ends of the different second dc conversion circuits 21 are connected to the second ends of the ac/dc conversion circuits 12, the second ends of the different second dc conversion circuits 21 are connected to the load connection ends of the different charge/discharge systems, and the first ends of the different second switches are connected to the first ends of the first dc conversion circuits 11, and the different second switches are connected to the second ends of the corresponding second dc conversion circuits 21.
In some examples, as shown in fig. 3, the plurality of second switches are second switches K21 to K2n, respectively. When the second switch K22 is closed, the energy storage battery 40 can charge the load device L2 via the first dc conversion circuit 11.
In other words, by providing a plurality of second switches, one energy storage battery 40 can be effectively controlled to supply power to different load devices 50, so that the functions of the charge and discharge system are further expanded, and the application scenario of the charge and discharge system is effectively promoted.
In some examples, the charging and discharging system may further include a switching unit 80, where the switching unit 80 is disposed between the load device 50 and the second dc conversion circuit 21 to regulate the first ac power output from the plurality of discharging circuits 20 to be input to the one or more load devices 50. For example, one load device 50 may require 500KW of the first alternating current, five discharge circuits 20 may output 100KW of the first alternating current, respectively, and the switching unit 80 may regulate the first alternating current output from the five discharge circuits 20 into 500KW of the first alternating current and output to the load device 50.
In some embodiments, the plurality of first dc conversion circuits are connected at first ends of the different first dc conversion circuits and second ends of the ac/dc conversion circuits 12, the second ends of the different first dc conversion circuits are connected with battery connection ends of different charge/discharge systems, the charge/discharge systems further include a third switch connected between the second ends of the adjacent second dc conversion circuits, wherein when the first battery connection ends of the charge/discharge systems are discharged to the first load connection ends of the charge/discharge systems, the second switch corresponding to the first battery connection ends of the charge/discharge systems is closed, and the third switch between the second dc conversion circuits corresponding to the first battery connection ends of the charge/discharge systems and the second dc conversion circuits corresponding to the first load connection ends of the systems is closed, wherein the battery connection ends of the charge/discharge systems include the first battery connection ends, and the load connection ends of the charge/discharge systems include the first load connection ends.
As shown in fig. 4, the first switches are, for example, first switches Kj1 to Kjn, the second switches are, for example, second switches Km1 to Kmn, and the third switches are, for example, kh1 to Khn-1. When the energy storage battery 40B1 supplies power to the load device 50L2, the second switch km1 is closed, and the third switch kh1 is closed, so as to instruct an energy storage battery 40 to supply power to the load device 50 according to the requirement.
In other words, by providing a plurality of first, second and third switches cooperating with each other
In some examples, the charge-discharge system further includes a control circuit that may be communicatively coupled to the first dc conversion circuit, the ac-dc conversion circuit, or the second conversion circuit such that the first dc conversion circuit, the ac-dc conversion circuit, or the second conversion circuit adjusts the conversion efficiency under control of the control circuit. The control circuit may also be electrically connected to the first switch, the second switch, and the third switch such that the first switch, the second switch, and the third switch are opened or closed under control of the control circuit.
In some examples, the number of the energy storage batteries 40 may be less than or equal to the number of the second dc conversion circuits 21, that is, the second ends of the partial second dc conversion circuits 21 are not connected to any one of the second switches, that is, any one of the energy storage batteries 40 cannot discharge to the load connection end of the partial charge/discharge system.
According to the charging device provided by the embodiment of the disclosure, the charging device comprises an auxiliary power supply battery and the charging and discharging system of any embodiment. The auxiliary power supply battery is connected with a battery connecting end of the charging and discharging system, and a load connecting end of the charging and discharging system is connected with load equipment.
In other words, the charging device is, for example, a charging pile or a power supply cabinet, etc., and is not limited herein. The charging device is provided with the charging and discharging system, so that the utilization efficiency of the internal space of the charging device can be effectively improved, and the manufacturing cost of the charging device can be reduced.
In some embodiments, the charging device further comprises a power supply system, an output end of the power supply system is connected with a bus of the charging and discharging system, and the power supply system supplies power for the auxiliary power supply battery or the load equipment.
In this embodiment, the power supply system is, for example, a power grid or a clean energy source, and the clean energy source is, for example, a wind power generation device or a solar power generation device, and the like, which is not limited herein. In other words, by providing a power supply system, it is achieved that the charging device is able to supply power to different load devices.
In some embodiments, as shown in fig. 4, the power supply system may include a transformer 61, an ac-dc converter 71 and a photovoltaic module 70, wherein a first end of the transformer 61 is connected to the power grid, a second end of the transformer 61 is used as an output end of the power supply system, a first end of the ac-dc converter 71 is connected to the photovoltaic module 70, and a second end of the ac-dc converter 71 is used as an output end of the power supply system.
In this embodiment, the transformer 61 is, for example, a dc-ac conversion circuit, and can convert the tenth dc power output from the power grid into the first ac power and output the first ac power to the bus of the charging and discharging system. The ac-dc converter 71 is, for example, an ac-dc conversion circuit, and may convert the eleventh dc power output from the photovoltaic module 70 into a first ac power and output the first ac power to the bus bar of the charging and discharging system. In other words, the charging device can charge the load equipment through different power supplies, and the application scene of the charging device is expanded.
While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (9)
1. A charge-discharge system, the system comprising:
The first end of the charging circuit is connected with a bus of the system, and the second end of the charging circuit is connected with a battery connecting end of the system;
The first end of the discharging circuit is connected with a bus of the system, and the second end of the discharging circuit is connected with a load connecting end of the system;
Wherein the charging circuit and the discharging circuit multiplex part of the rectifying devices;
The charging circuit comprises a first direct current conversion circuit and an alternating current-direct current conversion circuit, wherein a first end of the alternating current-direct current conversion circuit is connected with a bus of the system, a second end of the alternating current-direct current conversion circuit is connected with a first end of the first direct current conversion circuit, and a second end of the first direct current conversion circuit is connected with an energy storage battery;
The charging circuit and the discharging circuit multiplex part of rectifying devices comprise the charging circuit and the discharging circuit multiplex the alternating current-direct current conversion circuit;
The discharging circuit further comprises a second direct current conversion circuit, a first end of the second direct current conversion circuit is connected with a second end of the alternating current-direct current conversion circuit, and a second end of the second direct current conversion circuit is connected with a load connection end of the system.
2. The system of claim 1, wherein the charging circuit further comprises a first switch, a first terminal of the first switch being connected to the second terminal of the ac-to-dc conversion circuit, a second terminal of the first switch being connected to the first dc-to-dc conversion circuit;
When the first switch is turned off, the discharging circuit converts the first alternating current output by the bus into second direct current and outputs the second direct current to the load equipment.
3. The system of claim 2, wherein the first dc conversion circuit is a plurality of, a first end of the different first dc conversion circuit being connected to a second end of the ac-dc conversion circuit, a second end of the different first dc conversion circuit being connected to a different energy storage battery;
The first switches are multiple, the first ends of the different first switches are connected with the second ends of the alternating current-direct current conversion circuits, and the different first switches are connected with the first ends of the corresponding first direct current conversion circuits.
4. The system of claim 1, further comprising a second switch, a first terminal of the second switch being connected to a first terminal of the first dc conversion circuit, a second terminal of the second switch being connected to a second terminal of the second dc conversion circuit;
when the second switch is closed, the first direct current conversion circuit outputs third direct current output by the battery connection end of the system to the load connection end of the system.
5. The system of claim 4, wherein the plurality of second dc conversion circuits are provided, a first end of a different second dc conversion circuit is connected to the second end of the ac-dc conversion circuit, and a second end of a different second dc conversion circuit is connected to a load connection end of a different system;
The first ends of the different second switches are connected with the first ends of the first direct current conversion circuits, and the different second switches are connected with the second ends of the corresponding second direct current conversion circuits.
6. The system of claim 5, wherein the first dc conversion circuit is a plurality of different first dc conversion circuits having first ends connected to the second ends of the ac-dc conversion circuits and second ends of the different first dc conversion circuits connected to battery connection ends of different systems;
The system further comprises a third switch connected between the second ends of the adjacent second direct current conversion circuits;
When the first battery connection end of the system discharges to the first load connection end of the system, a second switch corresponding to the first battery connection end of the system is closed, and a third switch between a second direct current conversion circuit corresponding to the first battery connection end of the system and a second direct current conversion circuit corresponding to the first load connection end of the system is closed, wherein the battery connection end of the system comprises a first battery connection end, and the load connection end of the system comprises a first load connection end.
7. A charging device comprising an auxiliary power supply battery and the charging and discharging system according to any one of claims 1 to 6;
The auxiliary power supply battery is connected with the battery connecting end of the charging and discharging system, and the load connecting end of the charging and discharging system is connected with load equipment.
8. The apparatus of claim 7, further comprising a power supply system, an output of the power supply system being connected to a bus of the charge-discharge system, the power supply system powering the auxiliary power battery or the load device.
9. The apparatus of claim 8, wherein the power supply system comprises a transformer, an ac-dc converter, and a photovoltaic module;
The first end of the transformer is connected with a power grid, the second end of the transformer is used as an output end of the power supply system, the first end of the alternating current-direct current converter is connected with the photovoltaic module, and the second end of the alternating current-direct current converter is used as an output end of the power supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420848552.7U CN222464200U (en) | 2024-04-22 | 2024-04-22 | Charging and discharging system and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420848552.7U CN222464200U (en) | 2024-04-22 | 2024-04-22 | Charging and discharging system and charging device |
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| CN222464200U true CN222464200U (en) | 2025-02-11 |
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| CN202420848552.7U Active CN222464200U (en) | 2024-04-22 | 2024-04-22 | Charging and discharging system and charging device |
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