Energy storage charger

Abstract

The utility model provides an energy storage charger, which is provided with an electrical cabin, a battery cabin and a control cabin, the battery cabin is positioned on one side of the electrical cabin, the control cabin is positioned on the other side of the electrical cabin, and the electrical cabin comprises an alternating current bus, a high voltage device and a plurality of bidirectional converters; the battery cabin comprises a battery pack, the battery pack comprises a plurality of battery boxes, the control cabin comprises an energy manager, the battery pack is connected with one end of the high-voltage device, the battery boxes are connected in series, the bidirectional converters are connected in parallel, and each bidirectional converter comprises a first direct current unit and a first alternating current unit. The first direct current unit is connected with the other end of the high-voltage device, the first alternating current unit is connected with the alternating current bus, the alternating current bus is connected with the power grid, the energy manager is in communication connection with the high-voltage device, and the energy manager is in communication connection with the bidirectional converter, so that power supply dynamic balance between the energy storage charger and the local power grid is realized. And the impact of the energy storage charger on the power utilization demand of a local power grid is reduced.

Description

Technical Field

[0001] The utility model relates to the field of power supply, in particular to an energy storage charger. Background Art

[0002] With the continuous development of new energy vehicles, public charging piles have become an important part of the development of new energy vehicles. However, the power distribution capacity of public transformers built in some remote, wild, mountaintop and other areas cannot meet the charging needs of high-power public charging piles. When a large number of public charging piles are charging, it is easy to cause overload or low voltage problems at the end of the local power grid lines. Summary of the Utility Model

[0003] An object of the utility model is to solve at least one of the technical problems existing in the prior art, and provide an energy storage charger, which can achieve dynamic power supply balance between the energy storage charger and the local power grid through the electric energy storage of the battery compartment, the power distribution and control of the electrical compartment, and the power scheduling control of the control compartment, reduce the power supply impact of the energy storage charger on the local power grid, and improve the charging stability of the energy storage charger at the same time.

[0004] To achieve the above object, the first aspect of the embodiments of the present application provides an energy storage charger, including:

[0005] An electrical compartment, which includes an AC bus, a high-voltage device and a plurality of bidirectional converters. The bidirectional converters are used to control the power distribution direction of the energy storage charger, the high-voltage device is used to control the charge and discharge functions of each battery box, and the AC bus is used as the power distribution and transmission channel of the energy storage charger; the bidirectional converters are connected in parallel with each other. The bidirectional converter includes a first DC unit and a first AC unit. The first DC unit is connected to one end of the high-voltage device, the first AC unit is connected to the AC bus, and the AC bus is connected to the power grid;

[0006] A battery compartment, which is located on one side of the electrical compartment. The battery compartment includes a battery pack, and the battery pack is connected to the other end of the high-voltage device. The battery pack includes a plurality of battery boxes, and the battery boxes are used to store electric energy. The battery boxes are arranged vertically;

[0007] A control compartment, which is located on the other side of the electrical compartment. The control compartment includes an energy manager, which is used to control the power scheduling of the energy storage charger. The energy manager is communicatively connected to the high-voltage device and communicatively connected to the bidirectional converter.

[0008] Further, in some embodiments, the energy storage charger further includes a photovoltaic power generation device and a photovoltaic inverter. The photovoltaic power generation device is used to convert light energy into electrical energy, and the photovoltaic inverter is used to convert the direct current generated by the photovoltaic power generation device into alternating current. The photovoltaic power generation device is connected to the photovoltaic inverter, the photovoltaic inverter is connected to the AC bus, and the photovoltaic inverter is communicatively connected to the energy manager.

[0009] Further, in some embodiments, the energy storage charger further includes a charging gun, which is used as a charging interface for an external electric vehicle and is mounted on the side of the energy storage charger.

[0010] Further, in some embodiments, the electrical compartment further includes a plurality of charging modules. Each charging module is located below the bidirectional converter and is connected in parallel with each other. The charging module includes a second DC unit and a second AC unit. The second DC unit is connected to the charging gun, and the second AC unit is connected to the AC bus.

[0011] Further, in some embodiments, the control compartment further includes a charging controller, which is used to control the operation of the plurality of charging modules. The charging controller is communicatively connected to the charging modules and the energy manager, and the charging controller is located below the energy manager.

[0012] Further, in some embodiments, the electrical compartment further includes a display screen, which is used to display relevant parameters of the energy storage charger. The display screen is communicatively connected to the energy manager, is located below the high-voltage device, and is located above the bidirectional converter.

[0013] Further, in some embodiments, the electrical compartment further includes a distribution switch controller, which is used to control the opening and closing of the internal circuit of the energy storage charger. The distribution switch controller is provided below the charging module and includes a grid switch, a charging switch, a energy storage switch, and a photovoltaic switch. The grid switch is connected in series between the grid and the AC bus, the charging switch is connected in series between the charging module and the AC bus, the energy storage switch is connected in series between the bidirectional converter and the AC bus, and the photovoltaic switch is connected in series at the connection of the photovoltaic inverter and the AC bus.

[0014] Further, in some embodiments, the battery compartment further includes a fire extinguishing device, which includes a perfluoromethylhexanone gas cylinder, a heat-sensitive wire, and a composite gas detector. The composite gas detector is connected to the perfluoromethylhexanone gas cylinder, the heat-sensitive wire is connected to the perfluoromethylhexanone gas cylinder, the composite gas detector is located at the top of the battery compartment, the perfluoromethylhexanone gas cylinder is located at the bottom of the battery compartment and is fixed to the side cabinet door of the battery compartment. The heat-sensitive wire is used to detect the temperature inside the energy storage charger and trigger the perfluoromethylhexanone gas cylinder, the composite gas detector is used to detect the concentration of the composite gas inside the energy storage charger and trigger the perfluoromethylhexanone gas cylinder, and the perfluoromethylhexanone gas cylinder is used to release fire extinguishing gas.

[0015] Further, in some embodiments, the battery compartment further includes an air conditioner, which is disposed on the back of the energy storage charger, communicates with the battery compartment, is used as a heat dissipation component of the battery compartment, and is communicatively connected to the energy manager.

[0016] Further, in some embodiments, the high-voltage device includes a first control circuit and a second control circuit. The first control circuit includes a first DC contactor, a first DC circuit breaker, a fuse, and a current transformer. The first DC contactor is connected in series with the first DC circuit breaker, the first DC circuit breaker is connected in series with the current transformer, and the fuse is connected in parallel with the first DC circuit breaker. The second control circuit includes a second DC contactor, a second DC circuit breaker, and a battery management unit. The second DC contactor is connected in series with the second DC circuit breaker, and the second DC circuit breaker is connected in series with the battery management unit.

[0017] An energy storage charger according to an embodiment of the present invention has at least the following beneficial effects: by providing an electrical compartment, a battery compartment, and a control compartment, the battery compartment is located on one side of the electrical compartment, and the control compartment is located on the other side of the electrical compartment. Among them, the electrical compartment includes an AC bus for serving as a power distribution and transmission channel of the energy storage charger, a high-voltage device for controlling the charging and discharging functions of each battery box, and a plurality of bidirectional converters for controlling the power distribution direction of the energy storage charger. The bidirectional converters are connected in parallel with each other. The bidirectional converter includes a first DC unit and a first AC unit. The first DC unit is connected to one end of the high-voltage device, and the first AC unit is connected to the AC bus. The AC bus is connected to the power grid; the battery compartment includes a battery pack, the battery pack includes a plurality of battery boxes for storing electric energy, the battery compartment includes a battery pack, the battery pack is connected to the other end of the high-voltage device, the battery pack includes a plurality of battery boxes for storing electric energy, and the battery boxes are arranged vertically; the control compartment includes an energy manager for controlling the power scheduling of the energy storage charger. The energy manager is communicatively connected to the high-voltage device and the bidirectional converter, and can thus control through the electric energy storage of the battery compartment, the power distribution of the electrical compartment, and the power scheduling of the control compartment, thereby achieving the power supply dynamic balance between the energy storage charger and the local power grid, reducing the impact of the energy storage charger on the power consumption demand of the local power grid, and improving the charging stability of the energy storage charger at the same time.

[0018] Other features and advantages of the present invention will be described in the following specification, and will become apparent in part from the specification. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the technical solution of the present utility model, and do not constitute a limitation to the technical solution of the present utility model.

[0020] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 is an external structure diagram of an energy storage charger provided by an embodiment of the present utility model;

[0022] Figure 2 is an internal structure diagram of an energy storage charger provided by an embodiment of the present utility model;

[0023] Figure 3 is an overall circuit electrical topology diagram of an energy storage charger provided by an embodiment of the present utility model;

[0024] Figure 4 is a front internal structure diagram of an energy storage charger provided by an embodiment of the present utility model;

[0025] Figure 5 is a storage circuit electrical topology diagram of an energy storage charger provided by an embodiment of the present utility model;

[0026] Figure 6 is a charging circuit electrical topology diagram of an energy storage charger provided by an embodiment of the present utility model.

[0027] Reference numerals: electrical cabin 1000, AC bus 1100, high-voltage device 1200, first control circuit 1210, first DC contactor 1211, first DC circuit breaker 1212, fuse 1213, current transformer 1214, second control circuit 1220, second DC contactor 1221, second DC circuit breaker 1222, battery management unit 1223, bidirectional converter 1300, first DC unit 1310, first AC unit 1320, battery cabin 2000, battery pack 2100, battery box 2110, control cabin 3000, energy manager 3100, charging controller 3200, photovoltaic power generation device 4000, photovoltaic inverter 4100, charging gun 5000, charging module 5100, second DC unit 5110, second AC unit 5120, charging shunt 5200, charging fuse 5300, charging contactor 5400, display screen 6000, distribution switch controller 7000, grid switch 7100, charging switch 7200, energy storage switch 7300, photovoltaic switch 7400, fire extinguishing device 8000, perfluorinated hexanone gas cylinder 8100, heat-sensitive wire 8200, composite gas detector 8300, air conditioner 9000. Detailed implementation manners

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0029] In the description of the present utility model, if the first and second are described only for the purpose of distinguishing technical features, it should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", and "connected" should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0031] With the continuous development of new energy vehicles, public charging piles have become an important part of the development of new energy vehicles. However, in some remote, wild, mountain top and other areas, the power distribution capacity of public transformers cannot meet the charging requirements of high-power public charging piles. When a large number of public charging piles are charging, it is easy to cause problems such as overload or low voltage at the end of the local power grid line.

[0032] Based on this, the embodiment of the present utility model provides a energy storage charger. By providing an electrical cabin, a battery cabin and a control cabin, the battery cabin is located on one side of the electrical cabin, and the control cabin is located on the other side of the electrical cabin. Among them, the electrical cabin includes an AC bus for serving as the power distribution and transmission channel of the energy storage charger, a high-voltage device for controlling the charging and discharging functions of each battery box, and a plurality of bidirectional converters for controlling the power distribution direction of the energy storage charger. The bidirectional converters are connected in parallel with each other. The bidirectional converter includes a first DC unit and a first AC unit. The first DC unit is connected to one end of the high-voltage device, and the first AC unit is connected to the AC bus. The AC bus is connected to the power grid; the battery cabin includes a battery pack, the battery pack includes a plurality of battery boxes for storing electricity, the battery cabin includes a battery pack, the battery pack is connected to the other end of the high-voltage device, the battery pack includes a plurality of battery boxes for storing electricity, and the battery boxes are arranged vertically; the control cabin includes an energy manager for controlling the power scheduling of the energy storage charger. The energy manager is communicatively connected to the high-voltage device and the bidirectional converter. Furthermore, through the electrical energy storage of the battery cabin, the power distribution of the electrical cabin and the power scheduling control of the control cabin, the power supply dynamic balance between the energy storage charger and the local power grid can be realized, the impact of the energy storage charger on the power consumption demand of the local power grid is reduced, and at the same time, the charging stability of the energy storage charger is improved.

[0033] Therefore, in combination with the accompanying drawings, the embodiments of the present utility model will be further described below.

[0034] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, Figure 1 is an external structure diagram of an energy storage charger provided by an embodiment of the present utility model, Figure 2 is an internal structure diagram of an energy storage charger provided by an embodiment of the present utility model, Figure 3 is an overall circuit electrical topology diagram of an energy storage charger provided by an embodiment of the present utility model, Figure 4 is a front internal structure diagram of an energy storage charger provided by an embodiment of the present utility model, Figure 5 is an electrical topology diagram of the electricity storage circuit of an energy storage charger provided by an embodiment of the present utility model. The energy storage charger includes an electrical cabin 1000, a battery cabin 2000, and a control cabin 3000. The battery cabin 2000 is located on one side of the electrical cabin 1000, and the control cabin 3000 is located on the other side of the electrical cabin 1000. Among them, the electrical cabin 1000 includes an AC bus 1100, a high-voltage device 1200, and a plurality of bidirectional converters 1300. The bidirectional converter 1300 is used to control the power distribution direction of the energy storage charger. The high-voltage device 1200 is used to control the charging and discharging functions of each battery box 2110. The AC bus 1100 is used as the power distribution and transmission channel of the energy storage charger. The bidirectional converters 1300 are connected in parallel with each other. The bidirectional converter 1300 includes a first DC unit 1310 and a first AC unit 1320. The first DC unit 1310 is connected to one end of the high-voltage device 1200, and the first AC unit 1320 is connected to the AC bus 1100. The AC bus 1100 is connected to the power grid. The battery cabin 2000 includes a battery pack 2100. The battery pack 2100 is connected to the other end of the high-voltage device 1200. The battery pack 2100 includes a plurality of battery boxes 2110. The battery box 2110 is used to store electricity. The battery boxes 2110 are arranged vertically. The control cabin 3000 includes an energy manager 3100. The energy manager 3100 is used to control the power scheduling of the energy storage charger. The energy manager 3100 is communicatively connected to the high-voltage device 1200 and communicatively connected to the bidirectional converter 1300. Furthermore, the high-voltage device 1200 and the bidirectional converter 1300 can be controlled through the energy manager 3100, so as to realize the power scheduling and distribution between each battery box 2110 and the power grid on the AC bus 1100, achieve the power supply dynamic balance between the energy storage charger and the local power grid, reduce the impact of the energy storage charger on the power consumption demand of the local power grid, and improve the charging stability of the energy storage charger at the same time.

[0035] It should be noted that the battery box 2110 includes a plurality of battery cells (not labeled), and the battery cells are connected in series. Among them, the battery cell is a lithium iron phosphate battery with a voltage of 3.2V and a capacity of 280Ah. Sixteen battery cells are connected in series to form a battery box 2110, and seven battery boxes 2110 are connected in series to form a battery pack 2100 with a voltage of 358.4V, a capacity of 280Ah, and an energy of 100.352kWh.

[0036] Furthermore, from Figure 3 it can be seen that the energy storage charger also includes a photovoltaic power generation device 4000 and a photovoltaic inverter 4100. The photovoltaic power generation device 4000 is used to convert light energy into electrical energy, and the photovoltaic inverter 4100 is used to convert the direct current generated by the photovoltaic power generation device 4000 into alternating current. The photovoltaic power generation device 4000 is connected to the photovoltaic inverter 4100, the photovoltaic inverter 4100 is connected to the AC bus 1100, and the photovoltaic inverter 4100 is communicatively connected to the energy manager 3100.

[0037] It should be noted that the output power of each bidirectional converter 1300 is 22kW, and each bidirectional converter 1300 has an independent function of controlling the current direction and monitoring the current. By controlling multiple bidirectional converters 1300 in parallel, the energy storage charger can flexibly configure the current direction on the distribution circuit according to actual needs and expand the power capacity inside the energy storage charger. When a single bidirectional converter 1300 fails, the faulty bidirectional converter 1300 can withdraw from the current inversion work separately, without causing the overall shutdown of the energy storage charger.

[0038] It should also be noted that the bidirectional converter 1300 includes a grid-connected bidirectional inversion mode and an off-grid inversion mode. In the grid-connected bidirectional inversion mode, the energy storage charger can rectify the electrical energy transmitted by the photovoltaic power generation device 4000 and the power grid to the battery pack 2100, that is, charge the battery pack 2100, or invert the electrical energy stored in the battery pack 2100 from the battery pack 2100 to the power grid, that is, discharge the battery pack 2100. In the off-grid inversion mode, the electrical energy stored in the battery pack 2100 is inverted from the battery pack 2100 to the AC bus 1100, and then the electrical energy is distributed and transmitted based on the load on the AC bus 1100.

[0039] Furthermore, from Figure 4It can be seen that the energy storage charger also includes a charging gun 5000, which is used as the charging interface for an external electric vehicle. The charging gun 5000 is mounted on the side of the energy storage charger, and the DC output voltage range of the charging gun 5000 is 200V to 1000V, the maximum output power of the charging gun 5000 is 120KW, the maximum output current of the charging gun 5000 is 250A. The number of charging guns 5000 can be one or multiple, and the present application does not make specific limitations.

[0040] Further, referring to Figure 2 and Figure 6 shown, Figure 6 FIG. is an electrical topology diagram of the charging circuit of an energy storage charger provided by an embodiment of the present invention. The electrical cabin 1000 also includes a plurality of charging modules 5100. Each charging module 5100 is located below the bidirectional converter 1300, and the charging modules 5100 are connected in parallel with each other. The charging module 5100 includes a second DC unit 5110 and a second AC unit 5120. The second DC unit 5110 is connected to the charging gun 5000, and the second AC unit 5120 is connected to the AC bus 1100, so as to rectify the alternating current on the AC bus 1100 into direct current and provide a DC charging current for an external electric vehicle. Among them, the alternating current on the AC bus 1100 can be the electric energy provided by the power grid, or the electric energy provided by the battery pack 2100, or the electric energy provided by the photovoltaic power generation device 4000. The specific power supply situation is adjusted by the energy manager 3100.

[0041] It should be noted that, from Figure 6 it can be seen that a charging shunt 5200, a charging fuse 5300 and a charging contactor 5400 are also connected between the charging module 5100 and the charging gun 5000. The second DC unit 5110 is connected to the charging shunt 5200, the charging shunt 5200 is connected to the charging fuse 5300, the charging fuse 5300 is connected to the charging contactor 5400, and the charging contactor 5400 is connected to the charging gun 5000.

[0042] Further, from Figure 2It can be seen that the control cabin 3000 further includes a charging controller 3200. The charging controller 3200 is used to control the operation of multiple charging modules 5100. The charging controller 3200 is communicatively connected to the charging modules 5100 and communicatively connected to the energy manager 3100. The charging controller 3200 is located below the energy manager 3100. Among them, the charging controller 3200 includes a CAN communication interface. The charging controller 3200 can communicate and interact with the battery management system of an external electric vehicle based on the CAN communication interface to obtain the charging requirements of the vehicle in real time, and control the charging modules 5100 to output corresponding power, so as to dynamically adjust the charging power of the energy storage charger and avoid overload during the charging process of the external electric vehicle.

[0043] Among them, from Figure 2 It can be seen that the electrical cabin 1000 further includes a display screen 6000. The display screen 6000 is used to display relevant parameters of the energy storage charger. The display screen 6000 is communicatively connected to the energy manager 3100. The display screen 6000 is located below the high-voltage device 1200 and above the bidirectional converter 1300, so as to manually adjust the power scheduling status of the energy storage charger based on the parameters displayed on the display screen 6000.

[0044] Furthermore, from Figure 2 and Figure 3 It can be seen that the electrical cabin 1000 further includes a distribution switch controller 7000. The distribution switch controller 7000 is used to control the opening and closing of the internal circuit of the energy storage charger. The distribution switch controller 7000 is arranged below the charging modules 5100. The distribution switch controller 7000 includes a grid switch 7100, a charging switch 7200, a energy storage switch 7300, and a photovoltaic switch 7400. The grid switch 7100 is connected in series between the grid and the AC bus 1100. The charging switch 7200 is connected in series between the charging modules 5100 and the AC bus 1100. The energy storage switch 7300 is connected in series between the bidirectional converter 1300 and the AC bus 1100. The photovoltaic switch 7400 is connected in series at the connection point of the photovoltaic inverter 4100 and the AC bus 1100.

[0045] Furthermore, from Figure 2It can be seen that the battery compartment 2000 further includes a fire extinguishing device 8000. The fire extinguishing device 8000 includes a perfluoromethylcyclohexanone gas cylinder 8100, a thermal fuse 8200, and a composite gas detector 8300. The composite gas detector 8300 is connected to the perfluoromethylcyclohexanone gas cylinder 8100, and the thermal fuse 8200 is connected to the perfluoromethylcyclohexanone gas cylinder 8100. The composite gas detector 8300 is located at the top of the battery compartment 2000, and the perfluoromethylcyclohexanone gas cylinder 8100 is located at the bottom of the battery compartment 2000 and fixed to the side cabinet door of the battery compartment 2000. The thermal fuse 8200 is used to detect the temperature inside the energy storage charger and trigger the perfluoromethylcyclohexanone gas cylinder 8100, and the composite gas detector 8300 is used to detect the concentration of composite gas inside the energy storage charger and trigger the perfluoromethylcyclohexanone gas cylinder 8100. The perfluoromethylcyclohexanone gas cylinder 8100 is used to release fire extinguishing gas.

[0046] It should be noted that when the temperature inside the energy storage charger is too high, the thermal fuse 8200 will be ignited and trigger the perfluoromethylcyclohexanone gas cylinder 8100 after the thermal fuse 8200 burns out. Then, the perfluoromethylcyclohexanone gas cylinder 8100 releases perfluoromethylcyclohexanone gas through an atomizing nozzle to extinguish the fire; or when the composite gas detector 8300 detects smoke and the detected temperature exceeds the set value, the composite gas detector 8300 will directly trigger the perfluoromethylcyclohexanone gas cylinder 8100. Then, the perfluoromethylcyclohexanone gas cylinder 8100 releases perfluoromethylcyclohexanone gas through an atomizing nozzle to extinguish the fire.

[0047] Furthermore, from Figure 2 It can be seen that the battery compartment 2000 further includes an air conditioner 9000. The air conditioner 9000 is installed on the back of the energy storage charger. The air conditioner 9000 is connected to the battery compartment 2000. The air conditioner 9000 is used as a heat dissipation component of the battery compartment 2000, and the air conditioner 9000 is communicatively connected to the energy manager 3100.

[0048] It should be noted that the internal circulating air path of the air conditioner 9000 sucks in hot air from the upper part of the energy storage charger, and the cold air is discharged from the lower part of the air conditioner 9000; while the external circulating air path of the air conditioner 9000 sucks in external cold air from the lower part of the energy storage charger, and the hot air is discharged to the outside from the upper part of the energy storage charger after heat exchange.

[0049] Furthermore, from Figure 5It can be known that the high-voltage device 1200 includes a first control circuit 1210 and a second control circuit 1220. The first control circuit 1210 includes a first DC contactor 1211, a first DC circuit breaker 1212, a fuse 1213, and a current transformer 1214. The first DC contactor 1211 is connected in series with the first DC circuit breaker 1212, the first DC circuit breaker 1212 is connected in series with the current transformer 1214, and the fuse 1213 is connected in parallel with the first DC circuit breaker 1212. The second control circuit 1220 includes a second DC contactor 1221, a second DC circuit breaker 1222, and a battery management unit 1223. The second DC contactor 1221 is connected in series with the second DC circuit breaker 1222, and the second DC circuit breaker 1222 is connected in series with the battery management unit 1223.

[0050] Furthermore, the energy manager 3100 includes multiple RS485 interfaces, multiple CAN interfaces, multiple Ethernet interfaces, multiple DO output control interfaces, and multiple DI input signal detection interfaces.

[0051] Among them, the energy management unit is communicatively connected to the battery management unit 1223 in the high-voltage device 1200 based on the CAN interface to collect the operating status of the battery pack 2100 in real time and execute corresponding protection control strategies according to the collected data; the energy management unit communicates with the bidirectional converter 1300 in the high-voltage device 1200 based on the CAN interface to collect the operating status of the bidirectional converter 1300 in real time, control the charging and discharging functions of the battery pack 2100, and the magnitude of the charging and discharging power; the energy management unit communicates with the photovoltaic inverter 4100 based on the RS485 interface to adjust the output power of the photovoltaic inverter 4100 in real time according to the capacitance of the battery pack 2100, the photovoltaic power generation, and the charging demand; the energy management unit communicates with the charging controller 3200 based on the RS485 interface to collect the electric vehicle charging information in real time and adjust the bidirectional converter 1300 to control the discharge of the battery pack 2100 according to the electric vehicle charging demand; the energy management unit communicates with the display screen 6000 based on the RS485 interface to display the real-time data of devices such as the battery pack 2100, the bidirectional converter 1300, the photovoltaic inverter 4100, and the air conditioner 9000 in real time and control the parameter settings of the real-time data; the energy management unit communicates with the air conditioner 9000 based on the RS485 interface to turn the air conditioner 9000 on and off and set the operating temperature control according to the real-time collected battery cell temperature information.

[0052] It should be noted that the multiple DI input signal detection interfaces respectively detect the emergency stop signal, start signal, fire signal, water immersion signal, and access control signal in the energy storage charger.

[0053] Further, the energy storage charger also includes a power indicator light (not labeled), an operation indicator light (not labeled), a fault indicator light (not labeled), and a grid disconnector (not labeled). The power indicator light is communicatively connected to the energy manager 3100 based on the DO output control interface. The operation indicator light is communicatively connected to the energy manager 3100 based on the DO output control interface. The fault indicator light is communicatively connected to the energy manager 3100 based on the DO output control interface. The grid disconnector is communicatively connected to the energy manager 3100 based on the DO output control interface.

[0054] Further, the overall working principle of the above energy storage charger is described as follows:

[0055] The energy storage charger can store the electricity from the power grid and the photovoltaic power generation into the battery pack 2100. And the photovoltaic power generation device 4000, the battery pack 2100, and the power grid jointly undertake the power supply task. During peak electricity consumption, the energy storage charger can supply power to the power grid in reverse through the photovoltaic power generation device 4000 and the battery pack 2100. During off-peak electricity consumption, it can charge the battery pack 2100 or an external electric vehicle through the photovoltaic power generation device 4000 and the power grid, thereby enabling the energy storage charger to play a role in peak shaving and valley filling in the power distribution process of the power grid. At the same time, when the power distribution capacity of the local power grid cannot meet the charging demand of electric vehicles, the photovoltaic power generation device 4000, the battery pack 2100, and the power grid can simultaneously supply electric energy to external electric vehicles, thereby realizing the dynamic expansion of the charging capacity of electric vehicles and reducing the impact of high-power energy storage chargers on the power consumption demand of the local power grid.

[0056] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. An energy storage charger, characterized in that ,include: An electrical compartment, the electrical compartment comprising an AC bus, a high-voltage device and a plurality of bidirectional converters, the bidirectional converters being used to control the power distribution direction of the energy storage charger, the AC bus being used as a power distribution transmission channel of the energy storage charger; each of the bidirectional converters being connected in parallel, the bidirectional converter comprising a first DC unit and a first AC unit, the first DC unit being connected to one end of the high-voltage device, the first AC unit being connected to the AC bus, and the AC bus being connected to a power grid; A battery compartment, the battery compartment is located at one side of the electrical compartment, the battery compartment includes a battery pack, the battery pack is connected to the other end of the high-voltage device, the battery pack includes a plurality of battery boxes, the battery boxes are used to store electricity, the battery boxes are arranged up and down, and the high-voltage device is used to control the charging and discharging functions of each of the battery boxes; A control cabin, the control cabin is located on the other side of the electrical cabin, the control cabin includes an energy manager, the energy manager is used to control the power scheduling of the energy storage charger, the energy manager is communicatively connected to the high-voltage device, and the energy manager is communicatively connected to the bidirectional converter.

2. The energy storage charger according to claim 1, characterized in that: The energy storage charger also includes a photovoltaic power generation device and a photovoltaic inverter. The photovoltaic power generation device is used to convert light energy into electrical energy, and the photovoltaic inverter is used to convert direct current generated by the photovoltaic power generation device into alternating current. The photovoltaic power generation device is connected to the photovoltaic inverter, and the photovoltaic inverter is connected to the AC bus. The photovoltaic inverter is communicatively connected to the energy manager.

3. The energy storage charger according to claim 2, characterized in that: The energy storage charger also includes a charging gun, which is used as a charging interface for an external electric vehicle and is mounted on a side of the energy storage charger.

4. The energy storage charger according to claim 3, characterized in that: The electrical compartment also includes multiple charging modules, each of which is located below the bidirectional converter and is connected in parallel to each other. The charging modules include a second DC unit and a second AC unit, the second DC unit is connected to the charging gun, and the second AC unit is connected to the AC bus.

5. The energy storage charger according to claim 4, characterized in that: The control cabin also includes a charging controller, which is used to control the operation of the multiple charging modules. The charging controller is communicatively connected to the charging modules, and the charging controller is communicatively connected to the energy manager. The charging controller is located below the energy manager.

6. The energy storage charger according to claim 1, characterized in that: The electrical compartment also includes a display screen, which is used to display relevant parameters of the energy storage charger. The display screen is communicatively connected to the energy manager. The display screen is located below the high-voltage device and above the bidirectional converter.

7. The energy storage charger according to claim 4, characterized in that: The electrical compartment also includes a distribution switch controller, which is used to control the opening and closing of the internal circuit of the energy storage charger. The distribution switch controller is arranged below the charging module. The distribution switch controller includes a grid switch, a charging switch, an energy storage switch and a photovoltaic switch. The grid switch is connected in series between the grid and the AC bus, the charging switch is connected in series between the charging module and the AC bus, the energy storage switch is connected in series between the bidirectional converter and the AC bus, and the photovoltaic switch is connected in series at the connection between the photovoltaic inverter and the AC bus.

8. The energy storage charger according to claim 1, characterized in that: The battery compartment also includes a fire extinguishing device, which includes a perfluorohexanone gas cylinder, a thermistor and a composite gas detector. The composite gas detector is connected to the perfluorohexanone gas cylinder, the thermistor is connected to the perfluorohexanone gas cylinder, the composite gas detector is located at the top of the battery compartment, the perfluorohexanone gas cylinder is located at the bottom of the battery compartment and fixed to the side cabinet door of the battery compartment, the thermistor is used to detect the temperature in the energy storage charger and trigger the perfluorohexanone gas cylinder, the composite gas detector is used to detect the composite gas concentration in the energy storage charger and trigger the perfluorohexanone gas cylinder, and the perfluorohexanone gas cylinder is used to release fire extinguishing gas.

9. The energy storage charger according to claim 1, characterized in that: The battery compartment also includes an air conditioner, which is disposed on the back of the energy storage charger, is communicated with the battery compartment, is used as a heat dissipation component of the battery compartment, and is communicatively connected to the energy manager.

10. The energy storage charger according to claim 1, characterized in that: The high-voltage device includes a first control circuit and a second control circuit. The first control circuit includes a first DC contactor, a first DC circuit breaker, a fuse and a current transformer. The first DC contactor is connected in series with the first DC circuit breaker, the first DC circuit breaker is connected in series with the current transformer, and the fuse is connected in parallel with the first DC circuit breaker. The second control circuit includes a second DC contactor, a second DC circuit breaker and a battery management unit. The second DC contactor is connected in series with the second DC circuit breaker, and the second DC circuit breaker is connected in series with the battery management unit.

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