CN220421472U - Direct current stores up fills system - Google Patents

Abstract

The utility model relates to the technical field of energy storage and charging, in particular to a direct current storage and charging system, which comprises: the device comprises an energy storage battery, an AC/DC bidirectional isolation module, a first power supply unit, a charging gun, a second power supply unit, household appliances and photovoltaic charging equipment; one end of the AC/DC bidirectional isolation module is respectively and electrically connected with the input end of the mains supply and the output end of the energy storage battery, the other end of the AC/DC bidirectional isolation module is respectively and electrically connected with the charging gun through the first power supply unit and the household appliance through the second power supply unit, and the input end of the energy storage battery is electrically connected with the photovoltaic charging equipment; the AC/DC bidirectional isolation module is used for converting single-phase alternating current at the input end of the mains supply into direct current matched with the charging gun and converting direct current of the energy storage battery into single-phase alternating current matched with the household appliance; the utility model not only saves the whole cost of equipment, but also can improve the utilization rate of the AC/DC bidirectional isolation module and can reduce the occupied area of the equipment.

Description

Direct current stores up fills system

Technical Field

The utility model relates to the technical field of energy storage and charging, in particular to a direct-current storage and charging system.

Background

The demand of low-power direct current charging is increasing, and some low-power direct current chargers exist in the related technology, but the function is single, and only has the charging function. In some use scenarios, such as rural residences in china, are mostly large flat floors, with conditions for installing photovoltaic on the roof. However, the current household photovoltaic, energy storage and charging equipment is separately and independently managed, and an AC/DC bidirectional isolation module and a control module are independently used, so that the overall cost of the equipment is high, the utilization rate of the equipment is low, and the occupied area is increased.

Disclosure of Invention

Accordingly, an objective of the embodiments of the present utility model is to provide a dc charging system, which solves one or more of the problems of the prior art, and at least provides a beneficial choice or creation condition.

The embodiment of the utility model provides a direct current storage and charging system, which comprises: the device comprises an energy storage battery, an AC/DC bidirectional isolation module, a first power supply unit, a charging gun, a second power supply unit, household appliances and photovoltaic charging equipment;

one end of the AC/DC bidirectional isolation module is respectively and electrically connected with a mains supply input end and an output end of the energy storage battery, the other end of the AC/DC bidirectional isolation module is respectively and electrically connected with an input end of the first power supply unit and an input end of the second power supply unit, the output end of the first power supply unit is connected with the charging gun, the output end of the second power supply unit is connected with the household appliance, and the input end of the energy storage battery is electrically connected with the photovoltaic charging equipment;

the AC/DC bidirectional isolation module is used for converting single-phase alternating current at the mains supply input end into direct current matched with the charging gun, and converting direct current of the energy storage battery into single-phase alternating current matched with the household appliance.

Optionally, a first breaker is arranged between the mains input end and the AC/DC bidirectional isolation module.

Optionally, the first circuit breaker is further connected with a lightning protection device.

Optionally, an AC contactor is disposed between the first circuit breaker and the AC/DC bidirectional isolation module.

Optionally, the system further comprises an auxiliary power supply, a power supply control unit and a man-machine interaction unit, wherein the first circuit breaker is further connected with the power supply control unit through the auxiliary power supply, the power supply control unit is respectively in communication connection with the alternating current contactor and the man-machine interaction unit, and the power supply control unit is used for controlling the on-off of the alternating current contactor.

Optionally, the power supply control unit is also in communication connection with the charging gun through CAN communication and is used for controlling the power supply on-off of the charging gun.

Optionally, the power supply control unit is further in communication connection with the AC/DC bidirectional isolation module through CAN communication, and is used for controlling the circuit direction of the AC/DC bidirectional isolation module.

Optionally, the first power supply unit comprises a direct current contactor and a fuse, and the charging gun, the fuse, the direct current contactor and the AC/DC bidirectional isolation module are sequentially connected.

Optionally, the photovoltaic charging device includes MPPT controller, photovoltaic module, the both ends of MPPT controller are connected respectively photovoltaic module with energy storage battery.

Optionally, the second power supply unit includes a second circuit breaker, and two ends of the second circuit breaker are respectively connected with the household appliance and the AC/DC bidirectional isolation module.

The embodiment of the utility model has the following beneficial effects: according to the direct-current storage and charging system, the energy storage battery and the photovoltaic charging equipment are combined to form the household storage and charging system, and the system shares the set of AC/DC bidirectional isolation module and the control module, so that the integral cost of the equipment is saved, the utilization rate of the AC/DC bidirectional isolation module is improved, and the occupied area of the equipment is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic connection diagram of a dc storage and charging system according to an embodiment of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that although functional charging module partitioning is performed in the device schematic and a logic sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than charging module partitioning in the device or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the aspects of the application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more hardware charging modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.

First, several nouns involved in the utility model are parsed:

BMS (Battery MANAGEMENT SYSTEM), commonly called BATTERY care or BATTERY manager, is mainly used for intelligently managing and maintaining each BATTERY unit, preventing the BATTERY from being overcharged and overdischarged, prolonging the service life of the BATTERY, and monitoring the state of the BATTERY. The BMS battery management system unit comprises a BMS battery management system, a control module, a display module, a wireless communication module, electric equipment, a battery pack for supplying power to the electric equipment and an acquisition module for acquiring battery information of the battery pack, wherein the BMS battery management system is connected with the wireless communication module and the display module through communication interfaces respectively, the output end of the acquisition module is connected with the input end of the BMS battery management system, the output end of the BMS battery management system is connected with the input end of the control module, the control module is connected with the battery pack and the electric equipment respectively, and the BMS battery management system is connected with a Server through the wireless communication module.

The On Board Charger (OBC) is a Charger fixedly mounted On an electric automobile, has the capability of safely and automatically fully charging a power BATTERY of the electric automobile, and can dynamically adjust charging current or voltage parameters according to data provided by a BATTERY management system (BATTERY MANAGE MENT SYSTEM, BMS) to execute corresponding actions to complete a charging process.

In order to solve the problems in the background art, the direct current storage and charging system provided by the embodiment of the utility model combines the energy storage battery 110 and the photovoltaic charging equipment 170 to form a household storage and charging system, and the system shares one set of AC/DC bidirectional isolation module 120 and control module, so that the integral cost of the equipment is saved, the utilization rate of the AC/DC bidirectional isolation module 120 is improved, and the occupied area of the equipment is reduced.

As shown in fig. 1, fig. 1 is a dc storage charging system according to an embodiment of the present utility model, where the system includes: the energy storage battery 110, the AC/DC bidirectional isolation module 120, the first power supply unit 130, the charging gun 140, the second power supply unit, the home appliance 160 and the photovoltaic charging device 170;

one end of the AC/DC bidirectional isolation module 120 is electrically connected with a mains supply input end and an output end of the energy storage battery 110 respectively, the other end of the AC/DC bidirectional isolation module is electrically connected with an input end of the first power supply unit 130 and an input end of the second power supply unit respectively, the output end of the first power supply unit 130 is connected with the charging gun 140, the output end of the second power supply unit is connected with the household appliance 160, and the input end of the energy storage battery 110 is electrically connected with the photovoltaic charging device 170;

the AC/DC bidirectional isolation module 120 is configured to convert single-phase AC power at the mains input into DC power adapted to the charging gun 140, and to convert DC power of the energy storage battery 110 into single-phase AC power adapted to the household appliance 160.

It should be noted that, the control chip of the power supply control unit 600 has four CAN interfaces, two RS232 interfaces, six I/O interfaces, one USBFS interface, one USBHS interface, and one ENET interface. The power supply control unit 600 can control both the output of the charging gun 140 and the discharge of the energy storage battery 110.

In this embodiment, the AC/DC bidirectional isolation module 120 is an isolated bidirectional charging module, and the AC/DC bidirectional isolation module 120 can rectify and convert 220V single-phase AC to output voltage of 200Vdc to 850Vdc, and also has an inversion function, and can convert 200Vdc to 850Vdc DC to 220V single-phase AC, which should be noted that the AC/DC bidirectional isolation module 120 cannot convert 200Vdc to 850Vdc DC and 220V single-phase AC in both directions at the same time, but can select different conversion directions at different time intervals according to requirements. The power device of the AC/DC bidirectional isolation module 120 adopts SIC devices, so that the efficiency is better; the module adopts the heat dissipation mode of wind channel isolation, and its radiating effect is better.

In this embodiment, the energy storage battery 110 and the photovoltaic charging device 170 are combined to form a household energy storage system, and the system shares a set of AC/DC bidirectional isolation module 120 and a control module, so that the overall cost of the device is saved, the utilization rate of the AC/DC bidirectional isolation module 120 is improved, and the occupied area of the device is reduced.

In some embodiments, a first circuit breaker 200 is disposed between the mains input and the AC/DC bi-directional isolation module 120.

In some embodiments, the first circuit breaker 200 is further connected with a lightning protection device 300.

In some embodiments, an AC contactor 400 is disposed between the first circuit breaker 200 and the AC/DC bi-directional isolation module 120.

In some embodiments, the system further comprises an auxiliary power supply, a power supply control unit and a man-machine interaction unit, wherein the first circuit breaker is further connected with the power supply control unit through the auxiliary power supply, the power supply control unit is respectively in communication connection with the alternating current contactor and the man-machine interaction unit, and the power supply control unit is used for controlling on-off of the alternating current contactor.

In this embodiment, the power supply control unit 600 is communicatively connected to the ac contactor 400 through an I/O interface. In some exemplary embodiments, the auxiliary power supply 500 is comprised of two 150W 220V to 12V first switching power supplies and one 150W 220V to 24V second switching power supply. The control board, the BMS, the contactor, the display screen, and the like are mainly supplied with power through the power supply control unit 600. In some embodiments, the system further comprises a human-machine interaction unit consisting of a display screen (710), an actuation button (720) and an indicator light (730). Because it is a household self-charging stake, the start button (720) is charged in a one-key start mode.

In some embodiments, the power supply control unit 600 is further in communication connection with the charging gun 140 through CAN communication, and is used for controlling power supply on-off of the charging gun 140.

In some embodiments, the power control unit 600 is further communicatively connected to the AC/DC bidirectional isolation module 120 through CAN communication, for controlling the circuit direction of the AC/DC bidirectional isolation module 120.

In this embodiment, the power supply control unit 600 communicates with the charging gun 140 and the AC/DC bidirectional isolation module 120 in real time through 2 CAN interfaces, respectively.

In some embodiments, the first power supply unit 130 includes a DC contactor 131 and a fuse 132, and the charging gun 140, the fuse 132, the DC contactor 131, and the AC/DC bidirectional isolation module 120 are sequentially connected.

In some embodiments, the photovoltaic charging device 170 includes an MPPT controller 171 and a photovoltaic module 172, and two ends of the MPPT controller 171 are respectively connected to the photovoltaic module 172 and the energy storage battery 110.

In this embodiment, the photovoltaic module 172 that can be disposed on the roof stores energy in the energy storage battery 110 through the MPPT controller 171 (DC/DC power supply) after generating electricity, and the MPPT controller 171 (DC/DC power supply) can detect the generated voltage of the solar panel in real time and track the highest voltage current Value (VI) so that the photovoltaic module 172 charges the energy storage battery 110 with the maximum power output. The coordination system is applied to a solar photovoltaic system, coordinates the work of a solar cell panel, an energy storage cell 110 and a load, and is the brain of the photovoltaic system.

In some embodiments, the second power supply unit includes a second circuit breaker 150, and both ends of the second circuit breaker 150 are connected to the home appliance 160 and the AC/DC bidirectional isolation module 120, respectively.

The energy route at the time of charging is as follows: the utility power sequentially passes through the first circuit breaker 200, the alternating current contactor 400, the alternating current/DC bidirectional isolation module 120 (the power conversion path is that alternating current is converted into direct current), the direct current contactor 131, the fuse 132 and the charging gun 140.

It should be noted that the household charging pile does not provide the V2G function, because the household appliance 160 is mainly practical, so as to save the equipment cost. In some embodiments, the charging gun 140 employs a 125A current output specification, a single gun output.

The energy route at discharge is as follows: the energy storage battery 110 sequentially passes through the AC/DC bidirectional isolation module 120 (the power conversion path is direct current to alternating current), the second circuit breaker 150, and the household appliance 160.

It should be noted that, the AC/DC bidirectional isolation module 120 cannot charge the charging gun 140 and discharge the household appliance 160 at the same time, and when the charging gun 140 and the household appliance 160 are turned on at the same time, the household appliance 160 is selectively discharged, and the charging gun 140 is not charged.

In this embodiment, the energy storage battery 110 is discharged by selecting the home appliance 160 instead of grid connection, and in order to save the equipment cost, the home appliance 160 is usually about 3 to 10 kilowatt-hours, and the battery capacity of 10 kilowatt-hours is selected, so as to basically meet the household electricity demand.

It can be seen that, the content in the above system embodiment is applicable to the method embodiment, and the functions specifically implemented by the method embodiment are the same as those of the system embodiment, and the beneficial effects achieved by the system embodiment are the same as those achieved by the system embodiment.

Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional charging modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including multiple instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing a program.

Preferred embodiments of the present application are described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the embodiments of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present application shall fall within the scope of the claims of the embodiments of the present application.

Claims (10)

1. A dc storage charging system, the system comprising: the energy storage device comprises an energy storage battery (110), an AC/DC bidirectional isolation module (120), a first power supply unit (130), a charging gun (140), a second power supply unit, a household appliance (160) and a photovoltaic charging device (170);

one end of the AC/DC bidirectional isolation module (120) is respectively and electrically connected with a mains supply input end and an output end of the energy storage battery (110), the other end of the AC/DC bidirectional isolation module is respectively and electrically connected with an input end of the first power supply unit (130) and an input end of the second power supply unit, the output end of the first power supply unit (130) is connected with the charging gun (140), the output end of the second power supply unit is connected with the household appliance (160), and the input end of the energy storage battery (110) is electrically connected with the photovoltaic charging equipment (170);

the AC/DC bidirectional isolation module (120) is used for converting single-phase alternating current of the mains supply input end into direct current matched with the charging gun (140), and converting direct current of the energy storage battery (110) into single-phase alternating current matched with the household appliance (160).

2. The system according to claim 1, characterized in that a first circuit breaker (200) is arranged between the mains input and the AC/DC bi-directional isolation module (120).

3. The system according to claim 2, wherein the first circuit breaker (200) is further connected with a lightning protection device (300).

4. The system of claim 2, wherein an AC contactor (400) is disposed between the first circuit breaker (200) and the AC/DC bi-directional isolation module (120).

5. The system according to claim 4, further comprising an auxiliary power supply (500), a power supply control unit (600) and a man-machine interaction unit (700), wherein the first circuit breaker (200) is further connected to the power supply control unit (600) through the auxiliary power supply (500), the power supply control unit (600) is respectively in communication connection with the ac contactor (400) and the man-machine interaction unit (700), and the power supply control unit (600) is used for controlling the on-off of the ac contactor (400).

6. The system according to claim 5, wherein the power supply control unit (600) is further communicatively connected to the charging gun (140) via CAN communication for controlling the power supply on-off of the charging gun (140).

7. The system of claim 5, wherein the power control unit (600) is further communicatively coupled to the AC/DC bi-directional isolation module (120) via CAN communication for controlling a circuit direction of the AC/DC bi-directional isolation module (120).

8. The system of claim 1, wherein the first power supply unit (130) includes a direct current contactor (131) and a fuse (132), and the charging gun (140), the fuse (132), the direct current contactor (131), and the AC/DC bidirectional isolation module (120) are sequentially connected.

9. The system of claim 1, wherein the photovoltaic charging device (170) comprises an MPPT controller (171) and a photovoltaic module (172), and wherein two ends of the MPPT controller (171) are connected to the photovoltaic module (172) and the energy storage battery (110) respectively.

10. The system according to claim 1, wherein the second power supply unit comprises a second circuit breaker (150), both ends of the second circuit breaker (150) being connected to the household appliance (160) and the AC/DC bidirectional isolation module (120), respectively.