Optical storage and charging all-in-one machine

Abstract

The invention provides an optical storage and charging all-in-one machine. The light storage and charging all-in-one machine comprises an energy storage battery module, and the energy storage battery module comprises a first positive pole direct current bus and a first negative pole direct current bus; the high-voltage electrical box comprises a busbar, and an output port of the busbar is connected with the inverter; the direct current charging module comprises a second positive pole direct current bus and a second negative pole direct current bus; wherein the direct-current charging module is located above the high-voltage electrical box, the energy storage battery module is located below the high-voltage electrical box, and the direct-current charging module, the high-voltage electrical box and the energy storage battery module are connected in a plug-in terminal mode; the first positive pole direct current bus and the second positive pole direct current bus are electrically connected with the first port of the busbar respectively, and the first negative pole direct current bus and the second negative pole direct current bus are electrically connected with the second port of the busbar respectively. According to the invention, the problems of complex wiring, high installation cost, poor heat dissipation, inconvenient operation and the like in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power, and more specifically, to an integrated photovoltaic energy storage and charging device. Background Art

[0002] With the increasing shortage of non-renewable energy and the growing environmental protection pressure at home and abroad, countries around the world have been vigorously promoting renewable energy. The development and utilization of solar energy have become an irresistible trend, and storing and utilizing solar energy is an inevitable energy choice. At the same time, the current society advocates green environmental protection, energy conservation and emission reduction, which has led to an increasing penetration rate of new energy vehicles year by year. An integrated photovoltaic energy storage and charging device is a new type of power system that combines photovoltaic, energy storage batteries, electric vehicle charging, the power grid, and loads through power electronic conversion technology. Currently, all integrated photovoltaic energy storage and charging devices on the market adopt a split structure, that is, the hybrid inverter, energy storage battery, and charging pile are installed distributively. However, in related technologies, power cables and communication cables need to be connected between each functional module, so there are problems such as complex wiring, high installation costs, poor heat dissipation, and inconvenient operation. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention provides an integrated photovoltaic energy storage and charging device.

[0005] In view of this, according to the first aspect of the present invention, there is provided an integrated photovoltaic energy storage and charging device, wherein the integrated photovoltaic energy storage and charging device includes: an energy storage battery module for storing energy, the energy storage battery module including: a first positive DC bus and a first negative DC bus; a high-voltage electrical box for implementing electrical connection protection functions, energy scheduling functions, and energy monitoring functions, the high-voltage electrical box including: a busbar, an output port of the busbar being connected to an inverter; a DC charging module for realizing bidirectional energy flow, the DC charging module including: a second positive DC bus and a second negative DC bus; wherein, the DC charging module is located above the high-voltage electrical box, the energy storage battery module is located below the high-voltage electrical box, and the DC charging module, the high-voltage electrical box, and the energy storage battery module are connected by means of plug-in terminals; the first positive DC bus and the second positive DC bus are respectively electrically connected to a first port of the busbar, and the first negative DC bus and the second negative DC bus are respectively electrically connected to a second port of the busbar.

[0006] The integrated photovoltaic energy storage and charging device proposed by the present invention mainly includes: an energy storage battery module, a high-voltage electrical box, and a DC charging module. Among them, the energy storage battery module is mainly used for storing and releasing energy. The high-voltage electrical box is mainly used to implement electrical connection protection functions, energy scheduling functions, and energy monitoring functions. The DC charging module can achieve bidirectional energy flow. Further, the energy storage battery module includes: a first positive DC bus and a first negative DC bus. The DC charging module includes: a second positive DC bus and a second negative DC bus. The high-voltage electrical box includes: a bus bar. Among them, the first positive DC bus and the second positive DC bus are respectively electrically connected to the first port of the bus bar, and the first negative DC bus and the second negative DC bus are respectively electrically connected to the second port of the bus bar. The output port of the bus bar is connected to an inverter. That is to say, the energy storage battery module and the DC charging module share a power interface. By sharing a power interface between the energy storage battery module and the DC charging module, both the DC charging module and the energy storage battery module can be connected to the inverter. Furthermore, the inverter can transfer energy to the DC charging module, transfer energy to the energy storage battery module, or the DC charging module or the energy storage battery module can transfer energy to the inverter. Further, the DC charging module is located above the high-voltage electrical box, and the energy storage battery module is located below the high-voltage electrical box. The DC charging module, the high-voltage electrical box, and the energy storage battery module are connected by a plug-in terminal method, that is, the DC charging module, the high-voltage electrical box, and the energy storage battery module are sequentially stacked from top to bottom by the plug-in terminal method to form the integrated photovoltaic energy storage and charging device. By stacking the DC charging module, the high-voltage electrical box, and the energy storage battery module from top to bottom in sequence, the high-voltage electrical box can be used to isolate the DC charging module from the energy storage battery module, thus solving the heat dissipation problem in the related technology. Also, by setting the high-voltage electrical box in the middle, the wiring inside the integrated photovoltaic energy storage and charging device is made more concise. At the same time, by setting the DC charging module at the top, it is convenient for users to use. The present invention solves the problems in the related technology such as complex wiring, high installation cost, poor heat dissipation, and inconvenient operation.

[0007] In some technical solutions, optionally, the high-voltage electrical box further includes: a voltage and current acquisition module connected to the bus bar for acquiring voltage and / or current; a first controller connected to the voltage and current acquisition module for monitoring the acquired voltage and / or current and performing energy scheduling according to the acquired voltage and / or current.

[0008] In this technical solution, the high-voltage electrical box further includes: a voltage and current acquisition module and a first controller. Among them, the voltage and current acquisition module is connected to the busbar and can acquire the voltage and / or current of the energy storage battery module, the DC charging module, and the inverter. Further, the first controller is connected to the voltage and current acquisition module. The first controller can monitor the voltage and / or current acquired by the voltage and current acquisition module and can perform energy scheduling according to the acquired voltage and / or current. That is to say, the first controller can allocate the working modes of the energy storage battery module and the DC charging module. By setting the voltage and current acquisition module and the first controller in the high-voltage electrical box, the high-voltage electrical box can realize the energy scheduling function and the energy monitoring function.

[0009] In some technical solutions, optionally, the high-voltage electrical box further includes: a first communication port. The first controller is communicatively connected to the inverter through the first communication port for sending control instructions to the inverter.

[0010] In this technical solution, the high-voltage electrical box further includes: a first communication port. Among them, the first controller is connected to the first communication port, and the first communication port is connected to the inverter, so that the first controller can be communicatively connected to the inverter through the first communication port, and further the first controller can send control instructions to the inverter. The present invention realizes the communication connection between the first controller and the inverter by setting the first communication port in the voltage electrical box.

[0011] In some technical solutions, optionally, the DC charging module includes: a charging gun interface for connecting to a charging gun, and the charging gun is used to connect to an electric vehicle; a DC conversion module, the first end of the DC conversion module is respectively connected to the second positive DC bus and the second negative DC bus, and the second end of the DC conversion module is connected to the charging gun interface for performing voltage conversion and energy transmission; a second communication port for performing communication connection; a second controller, the first end of the second controller is connected to the second communication port, the second communication port is connected to the first communication port to enable the first controller to be connected to the second controller; the second end of the second controller is connected to the charging gun interface, and the third end of the second controller is connected to the DC conversion module for controlling the operation of the DC conversion module according to the control instructions sent by the first controller.

[0012] In this technical solution, the DC charging module includes: a charging gun interface, a DC conversion module, a second communication port, and a second controller. Among them, the charging gun interface can be connected to the charging gun, and the charging gun can be connected to the electric vehicle. Through the charging gun interface, the connection between the integrated photovoltaic energy storage charging device and the electric vehicle can be realized. The first end of the DC conversion module is respectively connected to the second positive DC bus and the second negative DC bus, and the second end of the DC conversion module is connected to the charging gun interface. The DC conversion module can perform voltage conversion and energy transfer. The second communication port enables the DC charging module to communicate with the outside. The first end of the second controller is connected to the second communication port, and the second communication port is connected to the first communication port, so that the second controller and the first controller are communicatively connected, enabling the second controller to receive the control instructions issued by the first controller. The second end of the second controller is connected to the charging gun interface, and the third end of the second controller is connected to the DC conversion module, so that the second controller can control the DC conversion module and the charging gun to work according to the received control instructions.

[0013] In some technical solutions, optionally, the DC charging module further includes: a relay. The first end of the relay is connected to the charging gun interface, and the second end of the relay is connected to the DC conversion module. Among them, when the relay is in the open state, the DC conversion module stops transmitting energy to the charging gun; when the relay is in the closed state, the DC conversion module transmits energy to the charging gun.

[0014] In this technical solution, the DC charging module further includes: a relay. Among them, the first end of the relay is connected to the charging gun interface, and the first end of the relay can be connected to the charging gun power interface in the charging gun interface. The second end of the relay is connected to the DC conversion module. When the relay is in the open state, the DC conversion module can stop transmitting energy to the charging gun. When the relay is in the closed state, the DC conversion module transmits energy to the charging gun. By setting a relay between the DC conversion module and the charging gun interface, the technical effect of controlling the energy flow between the DC conversion module and the charging gun is achieved.

[0015] In some technical solutions, optionally, the charging gun interface includes: a charging gun power interface. The DC conversion module is connected to the charging gun through the charging gun power interface for transmitting energy to the charging gun; a charging gun communication interface. The second controller is connected to the charging gun through the charging gun communication interface for issuing control instructions to the charging gun or receiving the status information sent by the charging gun.

[0016] In this technical solution, the charging gun interface includes: a charging gun power interface and a charging gun communication interface. Among them, the charging gun power interface is respectively connected to the DC conversion module and the charging gun, that is, the DC conversion module is connected to the charging gun through the charging gun power interface, so that energy can be transferred between the DC conversion module and the charging gun. The charging gun communication interface is respectively connected to the second controller and the charging gun, that is, the second controller is communicatively connected to the charging gun through the charging gun communication interface, so that the second controller can send control instructions to the charging gun or the second controller can receive the status information sent by the charging gun.

[0017] In some technical solutions, optionally, the energy storage battery module includes: at least one energy storage battery, wherein, a plurality of energy storage batteries are connected in series, and the plurality of energy storage batteries are stacked in sequence to form the energy storage battery module.

[0018] In this technical solution, the energy storage battery module includes at least one energy storage battery, and each energy storage battery is connected in series with each other, and at the same time, the plurality of energy storage batteries are stacked in sequence to form the energy storage battery module. That is to say, in the present invention, the number of energy storage batteries in the energy storage battery module can be configured according to the actual needs of users. Thus, it is convenient to expand the power of the integrated photovoltaic energy storage and charging device.

[0019] In some technical solutions, optionally, the energy storage battery includes: a battery cell for storing or releasing energy; a third controller, a first end of the third controller is communicatively connected to the battery cell, and a second end of the third controller is communicatively connected to the first positive DC bus, for controlling the battery cell to store or release energy.

[0020] In this technical solution, the energy storage battery includes: a battery cell and a third controller. Among them, the battery cell is mainly used for storing or releasing energy. A first end of the third controller is communicatively connected to the battery cell, a second end of the third controller is communicatively connected to the first positive DC bus, and the third controller can control the battery cell to store or release energy according to the voltage or current of the first positive DC bus.

[0021] In some technical solutions, optionally, the high-voltage electrical box is detachably connected to the inverter, wherein, there are multiple types of inverters, and the types of inverters correspond to the inverter communication protocols in the inverters.

[0022] In this technical solution, the high-voltage electrical box is detachably connected to the inverter. There are multiple types of inverters, and the types of inverters correspond to the inverter communication protocols of the inverters. That is to say, the inverters can be divided into multiple types of inverters according to the inverter communication protocols. A variety of inverter communication protocols are integrated in the high-voltage electrical box. Among them, a variety of inverter communication protocols are mainly integrated in the first controller, enabling the high-voltage electrical box to be connected to multiple inverters with different inverter communication protocols. Thus, the integrated energy storage charging and discharging unit can be connected to inverters from different manufacturers, facilitating user use.

[0023] In some technical solutions, optionally, the DC charging module is an optional module and is pluggable to the high-voltage electrical box. After the DC charging module is connected to the high-voltage electrical box, the integrated energy storage charging and discharging unit expands the bidirectional DC charging function.

[0024] In this technical solution, the DC charging module is an optional module, and the DC charging module is pluggable to the high-voltage electrical box. That is to say, the DC charging module and the high-voltage electrical box are detachably connected. Users can select a suitable DC charging module to connect to the high-voltage electrical box according to their needs, thus forming an integrated energy storage charging and discharging unit. After the DC charging module is connected to the high-voltage electrical box, the integrated energy storage charging and discharging unit expands the bidirectional DC charging function, that is, the integrated energy storage charging and discharging unit realizes the bidirectional DC charging function.

[0025] The additional aspects and advantages of the present invention will become apparent in the following description section or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0027] Figure 1 FIG. 1 shows one of the structural schematic diagrams of the integrated energy storage charging and discharging unit in the related art;

[0028] Figure 2 FIG. 2 shows another structural schematic diagram of the integrated energy storage charging and discharging unit in the related art;

[0029] Figure 3 FIG. 3 shows one of the structural schematic diagrams of the integrated energy storage charging and discharging unit according to an embodiment of the present invention;

[0030] Figure 4 FIG. 4 shows another structural schematic diagram of the integrated energy storage charging and discharging unit according to an embodiment of the present invention;

[0031] Figure 5 FIG. 5 shows a third structural schematic diagram of the integrated energy storage charging and discharging unit according to an embodiment of the present invention;

[0032] Figure 6Shows the fourth structural schematic diagram of the integrated photovoltaic energy storage and charging device according to an embodiment of the present invention;

[0033] Among them, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0034] 10' integrated photovoltaic energy storage and charging device, 102' inverter, 104' DC charging module, 106' energy storage battery module, 108' base, 1062' energy storage battery.

[0035] Figures 3 to 6 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0036] 10 integrated photovoltaic energy storage and charging device, 102 energy storage battery module, 1022 first positive DC bus, 1024 first negative DC bus, 104 high-voltage electrical box, 1042 busbar, 1044 first port, 1046 second port, 1048 output port, 108 inverter, 106 DC charging module, 1062 second positive DC bus, 1064 second negative DC bus, 110 voltage and current acquisition module, 112 first controller, 114 first communication port, 116 charging gun interface, 118 DC conversion module, 1182 first end of the DC conversion module, 1184 second end of the DC conversion module, 120 second controller, 1202 first end of the second controller, 1204 second end of the second controller, 1206 third end of the second controller, 122 relay, 124 electric vehicle, 126 energy storage battery, 128 battery cell, 130 third controller, 1302 first end of the third controller, 1304 second end of the third controller, 132 fuse, 134 base, 136 charging gun communication interface, 138 charging gun power interface, 140 charging gun, 142 second communication port. Detailed implementation manners

[0037] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the limitations of the specific embodiments disclosed below.

[0039] As Figure 1 and Figure 2 shown, Figure 1 is the integrated photovoltaic energy storage and charging device 10' in the related art. In Figure 1In the [photovoltaic-storage-charging integrated unit 10'], from top to bottom are the PCS (Power Conversion System, inverter) 102', the DC charging module 104', the energy storage battery module 106', and the base 108'. Among them, the energy storage battery module 106' includes a plurality of energy storage batteries 1062'. Figure 2 It is the photovoltaic-storage-charging integrated unit 10' in the related art. In Figure 2 the [photovoltaic-storage-charging integrated unit 10'], from top to bottom are the PCS (Power Conversion System, inverter) 102', the energy storage battery module 106', the DC charging module 104', and the base 108'. Among them, the energy storage battery module 106' includes a plurality of energy storage batteries 1062'. It can be seen that in the related art, the photovoltaic-storage-charging integrated unit 10' all adopts a split structure, that is, the inverter 102', the energy storage battery, and the DC charging module 104' are distributed and installed. Power cables and communication cables need to be connected between each functional module, and the installation is relatively complex, requiring professional personnel for installation, with a long installation time and high installation cost. Moreover, there are problems such as difficulty in expansion and high construction difficulty.

[0040] As Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, the present invention proposes a photovoltaic-storage-charging integrated unit 10. Among them, the photovoltaic-storage-charging integrated unit 10 includes: an energy storage battery module 102 for storing energy, and the energy storage battery module 102 includes: a first positive DC bus 1022 and a first negative DC bus 1024; a high-voltage electrical box 104 for realizing electrical connection protection function, energy scheduling function, and energy monitoring function, and the high-voltage electrical box 104 includes: a busbar 1042, and the output port 1048 of the busbar 1042 is connected to the inverter 108; a DC charging module 106 for realizing bidirectional energy flow, and the DC charging module 106 includes: a second positive DC bus 1062 and a second negative DC bus 1064; wherein, the DC charging module 106 is located above the high-voltage electrical box 104, the energy storage battery module 102 is located below the high-voltage electrical box 104, and the DC charging module 106, the high-voltage electrical box 104, and the energy storage battery module 102 are connected by a plug-in terminal method; the first positive DC bus 1022 and the second positive DC bus 1062 are respectively electrically connected to the first port 1044 of the busbar 1042, and the first negative DC bus 1024 and the second negative DC bus 1064 are respectively electrically connected to the second port 1046 of the busbar 1042.

[0041] The integrated photovoltaic energy storage and charging device 10 proposed by the present invention mainly includes: an energy storage battery module 102, a high-voltage electrical box 104, and a DC charging module 106. Among them, the energy storage battery module 102 is mainly used for storing and releasing energy, and the energy storage battery module 102 is stacked by at least one energy storage battery 126. The energy storage battery module 102 supports charging and discharging, power storage, fault protection, local data storage, and communication data reporting, etc. When the power of the energy storage battery module 102 is low, it can draw power from the power grid for charging according to the dispatching and actual scenario requirements or draw power from the photovoltaic module for charging. When the system operates in the off-grid mode or according to the dispatching requirements, the energy storage battery module 102 can also discharge to the load through the inverter 108.

[0042] The high-voltage electrical box 104 is mainly used to implement the functions of electrical connection protection, energy dispatching, and energy monitoring. Specifically, the high-voltage electrical box 104 integrates the wiring of the power part of the entire integrated photovoltaic energy storage and charging device 10, reducing the number of wire harnesses. At the same time, electrical components such as relays 122, circuit breakers, and fuses are integrated, enabling the high-voltage electrical box 104 to have the functions of protection and on / off. The high-voltage electrical box 104 also has functions such as voltage and current sampling, insulation impedance detection, temperature detection, and overvoltage and overcurrent protection for the integrated photovoltaic energy storage and charging device 10 externally or internally. At the same time, the high-voltage electrical box 104 also has an energy management system. The energy management system integrates the communication protocols of inverters 108 from major mainstream manufacturers and can be flexibly adapted to the inverter 108 through application selection to achieve the energy dispatching and control of the entire integrated photovoltaic energy storage and charging device 10, realize external communication, realize internal communication, and thus ensure the normal external communication and data transmission functions of the integrated photovoltaic energy storage and charging device 10.

[0043] The DC charging module 106 can achieve bidirectional energy flow, that is, the DC charging module 106 can convert the alternating current of the power grid into a voltage suitable for the load to charge the battery in the load. Among them, the load can be an electric vehicle 124. Exemplarily, the power of the power grid is converted from alternating current to direct current through the inverter 108, and the converted DC energy is subjected to DC-DC (Direct Current - Direct Current) conversion through the DC charging module 106 into a voltage suitable for the power battery of the electric vehicle 124 to charge the power battery of the electric vehicle 124, thus realizing the function of charging the electric vehicle 124 from the power grid. Vice versa, the same function can also be achieved. The energy of the power battery of the electric vehicle 124 is connected to the battery input port of the inverter 108 after DC conversion by the DC charging module 106, and then through the inversion conversion of the inverter 108, the energy of the power battery of the electric vehicle 124 flows to the power grid side.

[0044] Further, the energy storage battery module 102 includes a first positive DC bus 1022 and a first negative DC bus 1024. The DC charging module 106 includes a second positive DC bus 1062 and a second negative DC bus 1064. The high-voltage electrical box 104 includes a bus bar 1042. Among them, the first positive DC bus 1022 and the second positive DC bus 1062 are respectively electrically connected to the first port 1044 of the bus bar 1042, and the first negative DC bus 1024 and the second negative DC bus 1064 are respectively electrically connected to the second port 1046 of the bus bar 1042. The output port 1048 of the bus bar 1042 is connected to the inverter 108. That is to say, the energy storage battery module 102 and the DC charging module 106 share a power interface. By sharing a power interface between the energy storage battery module 102 and the DC charging module 106, both the DC charging module 106 and the energy storage battery module 102 can be connected to the inverter 108. Furthermore, the inverter 108 can transfer energy to the DC charging module 106 and the energy storage battery module 102, or the DC charging module 106 or the energy storage battery module 102 can transfer energy to the inverter 108.

[0045] Further, the DC charging module 106 is located above the high-voltage electrical box 104, and the energy storage battery module 102 is located below the high-voltage electrical box 104. The DC charging module 106, the high-voltage electrical box 104, and the energy storage battery module 102 are connected by means of plug-in terminals, that is, the DC charging module 106, the high-voltage electrical box 104, and the energy storage battery module 102 are sequentially stacked from top to bottom by means of plug-in terminals to form the integrated photovoltaic energy storage and charging device 10. By stacking the DC charging module 106, the high-voltage electrical box 104, and the energy storage battery module 102 sequentially from top to bottom, the high-voltage electrical box 104 can be used to isolate the DC charging module 106 from the energy storage battery module 102, thus solving the heat dissipation problem in the related art. Also, by arranging the high-voltage electrical box 104 in the middle, the wiring inside the integrated photovoltaic energy storage and charging device 10 is made more concise. At the same time, by arranging the DC charging module 106 at the top, it is convenient for users to use. The present invention solves the problems in the related art such as complex wiring, high installation cost, poor heat dissipation, and inconvenient operation.

[0046] In the present invention, the DC charging module 106, the high-voltage electrical box 104, and the energy storage battery module 102 are sequentially arranged from top to bottom in a way of using plug-in terminals to form the integrated photovoltaic energy storage and charging device 10. On the one hand, it is beneficial for heat dissipation. Specifically, the DC charging module 106 is a charge and discharge module, including power devices such as charge and discharge switching tubes. If the DC charging module 106 is close to the energy storage battery module 102, the DC charging module 106 will generate heat during the charge and discharge process, and this heat will heat up the adjacent energy storage battery 126, which will greatly affect the working efficiency of the energy storage battery 126. Therefore, it is necessary to separate the energy storage battery module 102 and the DC charging module 106. In the present invention, the high-voltage electrical box 104 is used to separate the DC charging module 106 and the energy storage battery module 102. The high-voltage electrical box 104 generates less heat during operation, and the heat generated by the DC charging module 106 has little impact on the operation of the high-voltage electrical box 104. On the other hand, it makes the electrical connection simple and saves the wiring cost. Specifically, the high-voltage electrical box 104 includes an energy management system inside, which can be understood as the brain of the integrated photovoltaic energy storage and charging energy storage system. The high-voltage electrical box 104 needs to be connected to the DC charging module 106 above and also to the energy storage battery module 102 below. Therefore, the wiring of setting the high-voltage electrical box 104 between the DC charging module 106 and the energy storage battery module 102 is the simplest and has the lowest cost. At the same time, the present invention also makes it more convenient and user-friendly for users. Specifically, the DC charging module 106 is set at the top. Since the charging gun 140 and the gun line are relatively heavy, setting them at the top is the most labor-saving for users to plug and unplug the charging gun 140. If the DC charging pile is set at the bottom, the user needs to pull out the charging gun 140 from below and then lift it up to charge the car, which is a relatively laborious operation and not user-friendly.

[0047] Further, in the present invention, by separately arranging the integrated photovoltaic energy storage and charging device 10 composed of the DC charging module 106, the high-voltage electrical box 104, and the energy storage battery module 102 from the inverter 108, the integrated photovoltaic energy storage and charging device 10 can be compatible with inverters 108 from different manufacturers. The high-voltage electrical box 104 integrates the inverter communication protocols of major mainstream manufacturers, and can select through an application program to make the high-voltage electrical box 104 adapt to the inverter communication protocols of inverters 108 from different manufacturers. In the existing technical architecture, the inverter 108 is also integrated inside, and this architecture limits the use of only a fixed inverter 108, and has poor compatibility with the inverter 108. Therefore, the integrated photovoltaic energy storage and charging device 10 provided by the present invention is more flexible and has better compatibility. For user families with existing inverters 108, it can directly be compatible with the existing inverters 108, and for users, the cost is lower.

[0048] In some embodiments, optionally, as Figure 6As shown, the high-voltage electrical box 104 further includes: a voltage and current acquisition module 110, which is connected to the bus bar 1042 and is used to acquire voltage and / or current; a first controller 112, which is connected to the voltage and current acquisition module 110 and is used to monitor the acquired voltage and / or current and perform energy scheduling according to the acquired voltage and / or current.

[0049] In this embodiment, the high-voltage electrical box 104 further includes: a voltage and current acquisition module 110 and a first controller 112. Among them, the voltage and current acquisition module 110 is connected to the bus bar 1042 and can acquire the voltage and / or current of the energy storage battery module 102, the DC charging module 106, and the inverter 108. Further, the first controller 112 is connected to the voltage and current acquisition module 110. The first controller 112 can monitor the voltage and / or current acquired by the voltage and current acquisition module 110 and can perform energy scheduling according to the acquired voltage and / or current. That is to say, the first controller 112 can allocate the working modes of the energy storage battery module 102 and the DC charging module 106. Specifically, the first controller 112 issues working mode instructions to the energy storage battery module 102 and the DC charging module 106 respectively according to the actual scenario requirements, that is, the acquired voltage and / or current, including: the charging instruction and the discharging instruction of the energy storage battery module 102 and the charging instruction and the discharging instruction of the DC charging module 106. By setting the voltage and current acquisition module 110 and the first controller 112 in the high-voltage electrical box 104, the high-voltage electrical box 104 can realize the energy scheduling function and the energy monitoring function.

[0050] In some embodiments, optionally, as Figure 6 shown, the high-voltage electrical box 104 further includes: a first communication port 114. The first controller 112 is communicatively connected to the inverter 108 through the first communication port 114 and is used to send control instructions to the inverter 108.

[0051] In this embodiment, the high-voltage electrical box 104 further includes: a first communication port 114. Among them, the first controller 112 is connected to the first communication port 114, and the first communication port 114 is connected to the inverter 108, so that the first controller 112 can be communicatively connected to the inverter 108 through the first communication port 114, and further the first controller 112 can send control instructions to the inverter 108. Among them, the control instructions include: the charge and discharge instructions of the electric vehicle 124 and the charge and discharge instructions of the energy storage battery module 102, so that the inverter 108 can perform corresponding operations according to the received control instructions. The present invention realizes the communication connection between the first controller 112 and the inverter 108 by setting the first communication port 114 in the voltage electrical box.

[0052] In some embodiments, optionally, as Figure 6 shown, the DC charging module 106 includes: a charging gun interface 116 for connecting to a charging gun 140, and the charging gun 140 is for connecting to an electric vehicle 124; a DC conversion module 118, a first end 1182 of the DC conversion module 118 is respectively connected to a second positive DC bus 1062 and a second negative DC bus 1064, and a second end 1184 of the DC conversion module 118 is connected to the charging gun interface 116 for voltage conversion and energy transmission; a second communication port 142 for communication connection; a second controller 120, a first end 1202 of the second controller 120 is connected to the second communication port 142, and the second communication port 142 is connected to the first communication port 114 to connect the first controller 112 and the second controller 120; a second end 1204 of the second controller 120 is connected to the charging gun interface 116, and a third end 1206 of the second controller 120 is connected to the DC conversion module 118 for controlling the operation of the DC conversion module 118 according to a control instruction issued by the first controller 112.

[0053] In this embodiment, the DC charging module 106 includes: a charging gun interface 116, a DC conversion module 118, a second communication port 142, and a second controller 120. Among them, the charging gun interface 116 can be connected to the charging gun 140, and the charging gun 140 can be connected to the electric vehicle 124. Through the charging gun interface 116, the connection between the integrated energy storage, charging and photovoltaic system 10 and the electric vehicle 124 can be realized. The first end 1182 of the DC conversion module 118 is respectively connected to the second positive DC bus 1062 and the second negative DC bus 1064, and the second end 1184 of the DC conversion module 118 is connected to the charging gun interface 116. The DC conversion module 118 can perform voltage conversion and energy transmission. Specifically, when the electric vehicle 124 is charging, the alternating current of the power grid is converted into direct current through the inverter 108, and then the converted direct current is subjected to DC-DC (Direct Current-Direct Current) conversion by the DC conversion module 118 into the voltage adapted to the power battery of the electric vehicle 124 to charge the power battery of the electric vehicle 124, thus realizing the function of the power grid charging the electric vehicle 124. Or the energy of the power battery of the electric vehicle 124 is subjected to DC-DC conversion by the DC conversion module 118, and then the converted energy is transmitted to the input port of the inverter 108, and then through the inversion conversion of the inverter 108, the energy flow of the electric vehicle 124 to the power grid side is realized. The second communication port 142 enables the DC charging module 106 to communicate with the outside. The first end 1202 of the second controller 120 is connected to the second communication port 142, and the second communication port 142 is connected to the first communication port 114, so that the second controller 120 and the first controller 112 are communicatively connected, enabling the second controller 120 to receive the control instructions issued by the first controller 112. The second end 1204 of the second controller 120 is connected to the charging gun interface 116, and the third end 1206 of the second controller 120 is connected to the DC conversion module 118, so that the second controller 120 can control the DC conversion module 118 and the charging gun 140 to work according to the received control instructions.

[0054] In some embodiments, optionally, as Figure 6 shown, the DC charging module 106 further includes: a relay 122. The first end of the relay 122 is connected to the charging gun interface 116, and the second end of the relay 122 is connected to the DC conversion module 118. Among them, when the relay 122 is in the open state, the DC conversion module 118 stops transmitting energy to the charging gun 140; when the relay 122 is in the closed state, the DC conversion module 118 transmits energy to the charging gun 140.

[0055] In this embodiment, the DC charging module 106 further includes: a relay 122. Wherein, the first end of the relay 122 is connected to the charging gun interface 116. Among them, the first end of the relay 122 can be connected to the charging gun power interface 138 in the charging gun interface 116. The second end of the relay 122 is connected to the DC conversion module 118. When the relay 122 is in the open state, the DC conversion module 118 can stop transmitting energy to the charging gun 140. When the relay 122 is in the closed state, the DC conversion module 118 transmits energy to the charging gun 140. By arranging the relay 122 between the DC conversion module 118 and the charging gun interface 116, the technical effect of controlling the energy flow between the DC conversion module 118 and the charging gun 140 is achieved.

[0056] In some embodiments, optionally, as Figure 6 shown, the charging gun interface 116 includes: a charging gun power interface 138. The DC conversion module 118 is connected to the charging gun 140 through the charging gun power interface 138 for transmitting energy to the charging gun 140; a charging gun communication interface 136. The second controller 120 is connected to the charging gun 140 through the charging gun communication interface 136 for sending control instructions to the charging gun 140 or receiving status information sent by the charging gun 140.

[0057] In this embodiment, the charging gun interface 116 includes: a charging gun power interface 138 and a charging gun communication interface 136. Among them, the charging gun power interface 138 is respectively connected to the DC conversion module 118 and the charging gun 140. That is, the DC conversion module 118 is connected to the charging gun 140 through the charging gun power interface 138, so that energy can be transmitted between the DC conversion module 118 and the charging gun 140. The charging gun communication interface 136 is respectively connected to the second controller 120 and the charging gun 140. That is, the second controller 120 is communicatively connected to the charging gun 140 through the charging gun communication interface 136, so that the second controller 120 can send control instructions to the charging gun 140 or the second controller 120 receives status information sent by the charging gun 140. Among them, the status information may include: whether the charging gun 140 is in the open state and whether the charging gun 140 is in contact with the electric vehicle 124, etc.

[0058] In some embodiments, optionally, as Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, the energy storage battery module 102 includes: at least one energy storage battery 126. Among them, a plurality of energy storage batteries 126 are connected in series, and a plurality of energy storage batteries 126 are stacked in sequence to form the energy storage battery module 102.

[0059] In this embodiment, the energy storage battery module 102 includes at least one energy storage battery 126, and the energy storage batteries 126 are connected in series with each other. At the same time, multiple energy storage batteries 126 are stacked in sequence to form the energy storage battery module 102. That is to say, in the present invention, the number of energy storage batteries 126 in the energy storage battery module 102 can be configured according to the actual needs of users. When the user needs to increase the energy storage battery 126, only the newly added energy storage battery 126 needs to be set above or below the original energy storage battery module 102 and connected in series with the energy storage batteries 126 in the original energy storage battery module 102, thus facilitating the expansion of the power of the integrated photovoltaic energy storage and charging device 10.

[0060] In some embodiments, optionally, as Figure 6 shown, the energy storage battery 126 includes: a battery cell 128 for storing or releasing energy; a third controller 130, the first end 1302 of the third controller 130 is communicatively connected to the battery cell 128, and the second end 1304 of the third controller 130 is communicatively connected to the first positive DC bus 1022 for controlling the battery cell 128 to store or release energy.

[0061] In this embodiment, the energy storage battery 126 includes: a battery cell 128 and a third controller 130. Among them, the battery cell 128 is mainly used for storing or releasing energy. The third controller 130 can be a BMU (Battery Management Unit), the first end 1302 of the third controller 130 is communicatively connected to the battery cell 128, the second end 1304 of the third controller 130 is communicatively connected to the first positive DC bus 1022, and the third controller 130 can control the battery cell 128 to store or release energy according to the voltage or current of the first positive DC bus 1022.

[0062] Furthermore, as Figure 6 shown, the energy storage battery 126 further includes: a fuse 132, one end of the fuse 132 is connected to the high-voltage electrical box 104, and the other end of the fuse 132 is connected to the battery cell 128.

[0063] In some embodiments, optionally, the high-voltage electrical box 104 is detachably connected to the inverter 108, wherein there are multiple types of inverters 108, and the types of the inverters 108 correspond to the inverter communication protocols in the inverters 108.

[0064] In this embodiment, the high-voltage electrical box 104 is detachably connected to the inverter 108. There are multiple types of inverters 108, and the types of the inverters 108 correspond to the inverter communication protocols of the inverters 108. That is to say, the inverters 108 can be divided into multiple types of inverters 108 according to the inverter communication protocols. A variety of inverter communication protocols are integrated in the high-voltage electrical box 104. Among them, a variety of inverter communication protocols are mainly integrated in the first controller 112, so that the high-voltage electrical box 104 can be connected to multiple inverters 108 with different inverter communication protocols. Thus, the integrated energy storage, charging and inverter unit 10 can be connected to inverters 108 from different manufacturers, which facilitates the use of users.

[0065] In some embodiments, optionally, the integrated energy storage, charging and inverter unit 10 further includes: a base 134, which is located below the energy storage battery module 102 and is used to support the energy storage battery module 102.

[0066] In this embodiment, as Figures 3 to 6 shown, the integrated energy storage, charging and inverter unit 10 further includes: a base 134. The base 134 is arranged below the energy storage battery module 102, and the base 134 plays a role in supporting the integrated energy storage, charging and inverter unit 10.

[0067] In some embodiments, optionally, the DC charging module 106 is an optional module and is pluggable to the high-voltage electrical box 104. After the DC charging module 106 is connected to the high-voltage electrical box 104, the integrated energy storage, charging and inverter unit 10 expands the bi-directional DC charging function.

[0068] In this embodiment, the DC charging module 106 is an optional module, and the DC charging module 106 is pluggable to the high-voltage electrical box 104. That is to say, the DC charging module 106 and the high-voltage electrical box 104 are detachably connected. Users can select a suitable DC charging module 106 to connect to the high-voltage electrical box 104 according to their needs, so as to form the integrated energy storage, charging and inverter unit 10. After the DC charging module 106 is connected to the high-voltage electrical box 104, the integrated energy storage, charging and inverter unit 10 expands the bi-directional DC charging function, that is, the integrated energy storage, charging and inverter unit 10 realizes the bi-directional DC charging function.

[0069] Furthermore, the number of the DC charging modules 106 can also be configured by users according to actual needs.

[0070] Exemplarily, when the high-voltage electrical box 104 receives a message indicating that the energy storage battery module 102 has a low power level, after the high-voltage electrical box 104 sends a request to the inverter 108 to charge the energy storage battery module 102, the alternating current of the power grid is rectified into direct current by the AC-DC (Alternating Current - Direct Current) converter of the inverter 108, and the direct current is then output after being converted by the DC-DC converter inside the inverter 108. The output of the inverter 108 is connected to the port of the energy storage battery module 102 through the high-voltage electrical box 104, and after being processed by the internal logic timing of the energy storage battery module 102, the process of storing the energy flowing from the power grid to the energy storage battery module 102 is completed.

[0071] Further, when the high-voltage electrical box 104 receives a message indicating that the energy storage battery module 102 has a low power level, after the high-voltage electrical box 104 sends a request to the inverter 108 to charge the energy storage battery module 102, the energy of the electric vehicle 124 starts to be DC-converted by the DC charging module 106, and then is input to the energy storage battery module 102 through the terminal, thereby realizing the discharge of the electric vehicle 124 to the energy storage battery module 102.

[0072] When the high-voltage electrical box 104 sends a request to charge the electric vehicle 124, the alternating current of the power grid is rectified into direct current by the inverter 108, and then is output after being converted by the DC-DC converter inside the inverter 108. The output of the inverter 108 is connected to the DC charging module 106 port after being connected to the high-voltage electrical box 104. Through the handshake communication between the DC charging module 106 and the electric vehicle 124 to establish a connection, after a series of logical action processes, the DC charging module 106 starts to perform DC conversion. The DC charging module 106 starts to output power, and after the relay 122 between the electric vehicle 124 and the DC charging module 106 is closed, after the corresponding power connection is completed, the power grid starts to charge the battery of the electric vehicle 124.

[0073] Further, when the high-voltage electrical box 104 sends a request to discharge to the power grid, the energy of the electric vehicle 124 starts to be DC-converted by the DC charging module 106, then is input to the inverter 108 through the terminal, and after being converted by the inverter 108, it is sent to the power grid, thereby realizing the process of the electric vehicle 124 discharging to the power grid.

[0074] In some embodiments, the integrated photovoltaic energy storage and charging device 10 is a home energy storage system, which can be used for two-way charging with the electric vehicle 124, can also be used for supplying power to home electrical loads, and can also be used for storing electrical energy, and the electrical energy can be sourced from the power generation of photovoltaic panels, can also be sourced from the charging of the mains power, and can also be sourced from the charging of the electric vehicle 124.

[0075] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance unless otherwise clearly specified and defined; the terms "connection", "installation", "fixation", etc. shall all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0077] The foregoing is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A photovoltaic energy storage charging integrated machine, characterized in that The integrated photovoltaic energy storage and charging device includes: An energy storage battery module for storing energy, the energy storage battery module includes: a first positive DC bus and a first negative DC bus; A high-voltage electrical box for realizing electrical connection protection function, energy scheduling function and energy monitoring function, the high-voltage electrical box includes: a busbar, and the output port of the busbar is connected to the inverter; A DC charging module for realizing bidirectional energy flow, the DC charging module includes: a second positive DC bus and a second negative DC bus; Wherein, the DC charging module is located above the high-voltage electrical box, the energy storage battery module is located below the high-voltage electrical box, and the DC charging module, the high-voltage electrical box and the energy storage battery module are connected by means of plug-in terminals; The first positive DC bus and the second positive DC bus are respectively electrically connected to the first port of the busbar, and the first negative DC bus and the second negative DC bus are respectively electrically connected to the second port of the busbar.

2. The integrated photovoltaic energy storage and charging device according to claim 1, wherein The high-voltage electrical box further includes: A voltage and current acquisition module, the voltage and current acquisition module is connected to the busbar for acquiring voltage and / or current; A first controller, the first controller is connected to the voltage and current acquisition module for monitoring the acquired voltage and / or current and performing energy scheduling according to the acquired voltage and / or current.

3. The integrated photovoltaic energy storage and charging device according to claim 2, wherein The high-voltage electrical box further includes: A first communication port, the first controller is communicatively connected to the inverter through the first communication port for sending control commands to the inverter.

4. The integrated photovoltaic energy storage and charging device according to claim 3, characterized in that The DC charging module includes: A charging gun interface for connecting to a charging gun, and the charging gun is used for connecting to an electric vehicle; A DC conversion module, the first end of the DC conversion module is respectively connected to the second positive DC bus and the second negative DC bus, and the second end of the DC conversion module is connected to the charging gun interface for performing voltage conversion and energy transmission; A second communication port for communication connection; A second controller, the first end of the second controller is connected to the second communication port, and the second communication port is connected to the first communication port so that the first controller is connected to the second controller; The second end of the second controller is connected to the charging gun interface, and the third end of the second controller is connected to the DC conversion module for controlling the operation of the DC conversion module according to the control commands sent by the first controller.

5. The integrated photovoltaic energy storage and charging device according to claim 4, characterized in that, The DC charging module further includes: A relay, the first end of the relay is connected to the charging gun interface, and the second end of the relay is connected to the DC conversion module. Wherein, when the relay is in the off state, the DC conversion module stops transmitting energy to the charging gun; when the relay is in the on state, the DC conversion module transmits energy to the charging gun.

6. The integrated photovoltaic energy storage and charging device according to claim 4, wherein, The charging gun interface includes: A charging gun power interface, the DC conversion module is connected to the charging gun through the charging gun power interface for transmitting energy to the charging gun; The charging gun communication interface, through which the second controller is connected to the charging gun, is used to send control instructions to the charging gun or receive status information sent by the charging gun.

7. The integrated photovoltaic energy storage and charging device according to any one of claims 1 to 6, characterized in that The energy storage battery module includes: At least one energy storage battery, wherein a plurality of the energy storage batteries are connected in series, and the plurality of energy storage batteries are stacked in sequence to form the energy storage battery module.

8. The integrated photovoltaic energy storage and charging device according to claim 7, characterized in that, The energy storage battery includes: A battery cell for storing or releasing energy; A third controller, with the first end of the third controller communicatively connected to the battery cell and the second end of the third controller communicatively connected to the first positive DC bus, for controlling the battery cell to store or release energy.

9. The integrated photovoltaic energy storage and charging device according to claim 1, wherein The high-voltage electrical box is detachably connected to the inverter. Among them, there are multiple types of inverters, and the types of inverters correspond to the inverter communication protocols inside the inverters.

10. The integrated photovoltaic energy storage and charging device according to claim 1, wherein The DC charging module is an optional module and is pluggable to the high-voltage electrical box. After the DC charging module is connected to the high-voltage electrical box, the integrated photovoltaic energy storage and charging device expands the two-way DC charging function.

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