Combined energy storage expansion system

Abstract

The utility model relates to a combined energy storage expansion system, which comprises an energy storage battery device and an expansion device, the energy storage battery device comprises an energy storage battery shell, and the energy storage battery shell is provided with an energy storage battery pack; the capacity expansion device comprises a capacity expansion shell, and the capacity expansion shell is provided with a capacity expansion battery pack; the energy storage battery device and the capacity expansion device are connected through a cable; and the energy storage battery device can control the capacity expansion device to charge and discharge. According to the expansion system, a user can connect the energy storage battery device through a cable to automatically expand the expansion device, on one hand, the electrical safety risk during installation can be reduced, and the installation cost is reduced; on the other hand, the expansion requirement of the household electrochemical energy storage device can be met, and the alternating current discharge power is also increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a combined energy storage expansion system. BACKGROUND

[0002] The household electrochemical energy storage system has a rich application market in countries or regions with high electricity prices and poor power grid quality. The purpose is to store the electricity produced by the power generation device or the electricity in the valley of the power grid in the energy storage system, so as to release the electricity for household use or transmission to the power grid during power failure, unstable power grid, night, and peak electricity price.

[0003] The existing household electrochemical energy storage device usually includes a fixed energy storage battery system and a bidirectional light storage AC / DC current conversion system. In actual work, the fixed energy storage battery system supplies DC power to the bidirectional light storage AC / DC current conversion system, which converts the DC power into AC power. The bidirectional light storage AC / DC current conversion system converts the AC power in the power grid into DC power and supplies it to the fixed energy storage battery system. In this system, the method commonly used to expand the battery capacity is to connect new energy storage battery systems in parallel or series to the old system. However, this often affects the safety of the batteries due to the consistency of the new and old batteries. Moreover, since only the battery capacity is expanded, the AC power output of the bidirectional light storage AC / DC current conversion system cannot be expanded. Furthermore, there is an electrical safety risk in the installation of the household electrochemical energy storage device, and there are regulations limiting it. If both capacity and power are to be expanded, new fixed energy storage battery systems and bidirectional light storage AC / DC current conversion systems must be installed by professional installers, and the old household electrochemical energy storage device must be powered off, disassembled, and the old electrical wiring must be modified. In addition to the cost of equipment, there is also the cost of secondary labor installation and modification.

[0004] Therefore, it is necessary to design a combined energy storage expansion system to solve the above technical problems. CONTENT OF THE INVENTION

[0005] Therefore, a combined energy storage expansion system is provided, which can enable users to install expansion devices on the energy storage battery device, reduce electrical safety risks during installation, reduce installation costs, and increase AC discharge power.

[0006] To solve the above problems, the present application provides a combined energy storage expansion system, which includes an energy storage battery device and an expansion device. The energy storage battery device includes an energy storage battery housing, and the inside of the energy storage battery housing is provided with an energy storage battery pack. The expansion device includes an expansion housing, and the inside of the expansion housing is provided with an expansion battery pack for storing electrical energy. The energy storage battery device and the expansion device are connected by a cable. The energy storage battery device can control the expansion device to charge and discharge.

[0007] Preferably, the energy storage battery housing is provided with a first interface connected to the energy storage battery pack; the expansion housing is provided with a second interface connected to the expansion battery pack; the first interface and the second interface are connected through the cable.

[0008] Preferably, the first interface and the second interface are both provided with a positive electrode pin, a negative electrode pin, a ground pin and a plurality of communication pins.

[0009] Preferably, one end of the cable is provided with a first plug interface matched with the first interface; the other end of the cable is provided with a second plug interface matched with the second interface.

[0010] Preferably, a first control circuit board is arranged between the external panel of the energy storage battery housing and the energy storage battery pack, and the first control circuit board is connected to the energy storage battery pack.

[0011] Preferably, the first interface is exposed and arranged on the external panel, and the first interface is connected to the first control circuit board.

[0012] Preferably, a second control circuit board is arranged between the back panel of the expansion housing and the expansion battery pack, and the second control circuit board is connected to the expansion battery pack.

[0013] Preferably, the second interface is exposed and arranged on the back panel, and connected to the second control circuit board.

[0014] Preferably, the back panel is further provided with a charging socket connected to the second control circuit board, for controlling the expansion battery pack to be charged by mains.

[0015] Preferably, the back panel is further provided with an alternating current discharge port and / or a direct current discharge port; the alternating current discharge port is connected to the second control circuit board for outputting alternating current; the direct current discharge port is connected to the second control circuit board for outputting direct current.

[0016] Advantages:

[0017] The above-mentioned combined energy storage expansion system, when expanding the household energy storage battery device during operation and maintenance, directly uses a cable to connect the energy storage battery device and the expansion device, and then the energy storage battery device can control the expansion device to charge and discharge; since the cable is directly used for external connection during expansion, there is no need to power off and disassemble the old energy storage battery device, which can solve the electrical safety problem during disassembly, and there is no need to modify the old electrical circuit, and there is no need to hire professional installers for installation, which can save installation costs. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a combined energy storage expansion system in the embodiment;

[0019] Figure 2 FIG. 2 is a partial schematic diagram of a first interface and a first plug interface in the embodiment;

[0020] Figure 3 FIG. 3 is a partial schematic diagram of a second interface and a second plug interface in the embodiment;

[0021] Figure 4 FIG. 4 is a structural schematic diagram of the first interface in the embodiment;

[0022] Figure 5 FIG. 5 is a structural schematic diagram of the expansion device in the embodiment Figure 1 .

[0023] Figure 6 FIG. 6 is a structural schematic diagram of the expansion device in the embodiment Figure 2 .

[0024] Reference signs: 10, energy storage battery device; 11, energy storage battery housing; 111, external panel; 12, first interface; 20, expansion device; 21, expansion housing; 211, back panel; 212, front panel; 22, second interface; 23, charging socket; 24, AC discharge port; 25, DC discharge port; 26, lighting module; 27, audio module; 30, cable; 31, first plug interface; 32, second plug interface; 40, positive pin; 50, negative pin; 60, ground pin; 70, communication pin. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0026] It should be noted that the diagrams provided in the embodiments are only schematic and that all related components are not necessarily shown in the diagrams for the sake of simplicity. The size, shape and arrangement of the components in the diagrams are not intended to be limiting and are only intended to be illustrative of the basic concept of the present application. The actual size, shape and arrangement of the components can be varied and can be more complex than the diagrams.

[0027] The structures, proportions, sizes, etc. shown in the drawings of the present specification are merely intended to facilitate the understanding of the content disclosed in the present specification for those skilled in the art, and are not intended to limit the defined conditions under which the present application can be implemented. Therefore, any modification of the structure, change of the proportional relationship, or adjustment of the size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0028] The orientations or positional relationships indicated by the terms such as "upper", "lower", "left", "right", "intermediate", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description and are not intended to indicate or imply that a referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In addition, the terms "first", "second", etc. are only used for the purpose of description and should not be construed as indicating or implying relative importance.

[0029] The embodiments of the present application provide a combined energy storage expansion system. In the process of expanding the energy storage battery device for home use, the cable is directly connected to the expansion device, without the need to power off and disassemble the old energy storage battery device, thereby solving the electrical safety problem in the disassembly process and saving installation costs.

[0030] The combined energy storage expansion system provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figure 1 As shown in the figure, the combined energy storage expansion system includes an energy storage battery device 10 and an expansion device 20. The energy storage battery device 10 includes an energy storage battery shell 11, and the inside of the energy storage battery shell 11 is provided with an energy storage battery pack. The energy storage battery pack is used to store electrical energy and can be charged and discharged. The expansion device 20 includes an expansion shell 21, and the inside of the expansion shell 21 is provided with an expansion battery pack. The expansion battery pack is used to store electrical energy and can be charged and discharged. The energy storage battery device 10 and the expansion device 20 are connected through a cable 30 to realize communication between the energy storage battery device 10 and the expansion device 20. The energy storage battery device 10 can control the expansion device 20 to charge and discharge.

[0031] In this embodiment, when the operation and maintenance process of the household energy storage battery device 10 is expanded, the cable 30 is directly connected to the expansion device 20, in other words, the energy storage battery device 10 and the expansion device 20 are connected through the cable 30 to realize the communication connection between the energy storage battery device 10 and the expansion device 20, and then the energy storage battery pack in the energy storage battery device 10 can control the expansion battery pack in the expansion device 20 to charge and discharge, and through the direct connection mode of the cable 30, the old energy storage battery device 10 does not need to be powered off and disassembled, which can solve the electrical safety problem in the disassembly process, and also does not need to modify the old electrical circuit, and does not need to hire professional installers for installation, which can save installation costs.

[0032] In this embodiment, it should be noted that the energy storage battery pack includes a fixed energy storage battery unit, a bidirectional light storage AC / DC current conversion unit, and an energy management system (EMS). In actual working process, the fixed energy storage battery unit supplies DC power to the bidirectional light storage AC / DC current conversion unit, which converts the AC power in the grid into DC power and supplies it to the fixed energy storage battery unit; the energy management system controls the operation of the fixed energy storage battery unit and the bidirectional light storage AC / DC current conversion unit, and can manage the charging or discharging of the fixed energy storage battery unit.

[0033] The expansion battery pack includes an expansion battery unit and a bidirectional inverter unit. In actual working process, the expansion battery unit supplies DC power to the bidirectional inverter unit, which converts the AC power in the grid into DC power and supplies it to the expansion battery unit; the energy management system of the energy storage battery pack can also control the operation of the expansion battery unit and the bidirectional inverter unit, and can manage the charging or discharging of the expansion battery unit.

[0034] Please refer to Figures 1-3As shown in the embodiment, it is also necessary to point out that the energy storage battery housing 11 is provided with a first interface 12 connected to the energy storage battery pack; the capacity expansion housing 21 is provided with a second interface 22 connected to the capacity expansion battery pack; the first interface 12 and the second interface 22 are connected through a cable 30. One end of the cable 30 is provided with a first plug interface 31 matched with the first interface 12, and the other end of the cable 30 is provided with a second plug interface 32 matched with the second interface 22. When connected, the first plug interface 31 of the cable 30 is plugged into the first interface 12, and the second plug interface 32 of the cable 30 is plugged into the second interface 22, so that the plugging operation can be completed through the matching of the plug interface and the interface, thereby realizing the communication connection between the energy storage battery device 10 and the capacity expansion device 20 through the use of the cable 30. Of course, the first interface 12 and the second interface 22 can be any shape of interface with the functions of transmitting alternating current and transmitting communication information.

[0035] The user can select the energy storage battery device 10 with the first interface 12 for installation at the beginning of the installation stage, and when the energy storage battery device 10 needs to be maintained and expanded during the later use process, the user only needs to use the plugging operation of the cable 30 to realize the installation of the capacity expansion device 20 on the energy storage battery device 10; when the capacity expansion device 20 is not needed, the user only needs to pull out the cable 30, at which time the capacity expansion device 20 and the energy storage battery device 10 can be separated and used separately. Thus, by increasing the capacity expansion device 20, the purpose of expanding the capacity of the energy storage battery device 10 can be achieved, and the capacity expansion device 20 is also separately provided with a capacity expansion battery unit and a bidirectional inverter unit, and the capacity expansion battery unit can input or output direct current, so that the energy storage battery device 10 can discharge at the same time, and the capacity expansion battery pack can also discharge, thereby realizing the purpose of expanding the power.

[0036] In summary, when the household energy storage battery device 10 is expanded during the maintenance process, the cable 30 can be directly plugged into the first interface 12 of the energy storage battery device 10 and the second interface 22 of the capacity expansion device 20 to realize connection, complete the expansion requirement of the energy storage battery device 10, and select the energy storage battery device 10 with the first interface 12 during installation, so that the user does not need to power off and disassemble the energy storage battery device 10 when expanding the energy storage battery device 10 later, thereby solving the electrical safety problem during disassembly, and the user can self-expand and install the capacity expansion device 20 by plugging the cable 30, reducing the electrical safety risk during installation, reducing the installation cost, increasing the alternating current discharge power, and removing the capacity expansion device 20 when necessary.

[0037] Please refer to Figures 2-4 As shown in the embodiment, it is also necessary to point out that the first interface 12 and the second interface 22 adopt the same structure, such asFigure 4 As shown, in the embodiment, only the first interface 12 is taken as an example for description, the first interface 12 is provided with a positive electrode pin 40, a negative electrode pin 50, a ground pin 60 and a plurality of communication pins 70, preferably, the positive electrode pin 40 and the negative electrode pin 50 are both AC positive and negative electrode pins. The number of the communication pins 70 is not specifically limited, in the embodiment, only three are taken as an example for description, which are a first communication pin, a second communication pin and a third communication pin, the first communication pin is responsible for communication of handshake information of the energy storage battery device 10 and the capacity expansion device 20, such as identity information of the capacity expansion device 20 detected by the energy storage battery device 10, the identity information includes ID serial number and the like. The second communication pin is responsible for communication of state information such as current size, voltage size, frequency, temperature and the like. The third communication pin is responsible for control instructions such as starting the capacity expansion device 20 and closing the capacity expansion device 20.

[0038] Specifically, when docking, the identity information of the capacity expansion device 20 is identified first when the capacity expansion device 20 is connected, if the identification is successful, the state information detection is entered, if the identification fails, the capacity expansion device 20 cannot be connected; in the state information detection, if the state information of the capacity expansion device 20 such as current size, voltage size, frequency, temperature and the like meets the requirements, the capacity expansion device 20 is allowed to be connected to the energy storage battery device 10, that is, the AC coupling action between the capacity expansion device 20 and the energy storage battery device 10 is completed, and the energy management system in the energy storage battery device 10 can control the capacity expansion device 20 to charge or discharge. If one or more of the state information of the capacity expansion device 20 such as current size, voltage size, frequency, temperature and the like does not meet the requirements, the state information continues to be monitored until the detection meets the requirements, and then the AC coupling operation is performed.

[0039] Please refer to Figure 1 and Figure 2 As shown, in the embodiment, it also needs to be explained that the first control circuit board is arranged between the external panel 111 of the energy storage battery shell 11 and the energy storage battery pack, and the first control circuit board is connected with the energy storage battery pack. The first interface 12 is exposed and arranged on the external panel 111, and the first interface 12 is connected with the first control circuit board.

[0040] Please refer to Figure 3 , Figure 5 and Figure 6As shown, in the embodiment, it also needs to be explained that the second control circuit board is arranged between the back panel 211 of the expansion shell 21 and the expansion battery pack, and the second control circuit board is electrically connected with the expansion battery pack. The second interface 22 is arranged on the back panel 211 of the expansion shell 21 and connected with the second control circuit board. The first interface 12 is exposed and arranged on the external panel 111 of the energy storage battery shell 11, and the second interface 22 is exposed and arranged on the back panel 211 of the expansion shell 21, so that the cable 30 can be directly plugged.

[0041] In an implementable manner, the back panel 211 of the expansion shell 21 is divided into an upper region, a middle region and a lower region from top to bottom, the AC discharge port 24 is arranged in the upper region, the AC discharge port 24 is connected with the second control circuit board and used for outputting AC power; the second interface 22 is arranged on the left side of the middle region, and the charging jack 23 is arranged on the right side of the middle region, the charging jack 23 is connected with the second control circuit board and used for external connection of commercial power, so that the expansion battery pack is charged by the commercial power; the DC discharge port 25 is arranged in the lower region, the DC discharge port 25 is connected with the second control circuit board and used for outputting DC power, for example, 12V DC power, through the DC discharge port 25, the user can realize 12V DC discharge to the external load, preferably, the DC discharge port 25 is divided into a USB DC discharge port and a Type-c DC discharge port, the USB DC discharge port is arranged on the left side of the lower region, and the Type-c DC discharge port is arranged on the right side of the lower region. The positions of the above-mentioned discharge ports can be adjusted according to actual conditions, and are not limited to the position arrangement manner in the embodiment.

[0042] Therefore, through the arrangement of the DC discharge port 25 and the AC discharge port 24, the expansion device 20 can discharge externally, so that when the expansion device 20 is used alone, it can be used as an outdoor mobile power supply, solving the outdoor power demand.

[0043] Please refer to Figure 5 and Figure 6 As shown, in the embodiment, it also needs to be explained that the second control circuit board is arranged between the back panel 211 of the expansion shell 21 and the expansion battery pack, and the second control circuit board is electrically connected with the expansion battery pack. The second interface 22 is arranged on the back panel 211 of the expansion shell 21 and connected with the second control circuit board. The first interface 12 is exposed and arranged on the external panel 111 of the energy storage battery shell 11, and the second interface 22 is exposed and arranged on the back panel 211 of the expansion shell 21, so that the cable 30 can be directly plugged.

[0044] In an implementable manner, the back panel 211 of the expansion shell 21 is divided into an upper region, a middle region and a lower region from top to bottom, the AC discharge port 24 is arranged in the upper region, the AC discharge port 24 is connected with the second control circuit board and used for outputting AC power; the second interface 22 is arranged on the left side of the middle region, and the charging jack 23 is arranged on the right side of the middle region, the charging jack 23 is connected with the second control circuit board and used for external connection of commercial power, so that the expansion battery pack is charged by the commercial power; the DC discharge port 25 is arranged in the lower region, the DC discharge port 25 is connected with the second control circuit board and used for outputting DC power, for example, 12V DC power, through the DC discharge port 25, the user can realize 12V DC discharge to the external load, preferably, the DC discharge port 25 is divided into a USB DC discharge port and a Type-c DC discharge port, the USB DC discharge port is arranged on the left side of the lower region, and the Type-c DC discharge port is arranged on the right side of the lower region. The positions of the above-mentioned discharge ports can be adjusted according to actual conditions, and are not limited to the position arrangement manner in the embodiment.

[0045] Please refer toFigure 5 and Figure 6 It is also to be noted that, as shown in FIG. 26, in the present embodiment, the front panel 212 of the expansion housing 21 is further provided with a sound module 27, which is arranged below the lighting module 26 and connected with the second control circuit board.

[0046] In one possible implementation, the sound module 27 can be a Bluetooth sound module, which includes a speaker, a power amplifier module for signal amplification, and a Bluetooth module for wirelessly receiving Bluetooth audio signals using a Bluetooth protocol. The power amplifier module is arranged in the speaker, which is bowl-shaped. A battery module or an expansion battery pack of the expansion device 20 is connected with an input end of the Bluetooth module of the sound module to provide power supply for the sound module. In one example, the Bluetooth module generally includes a housing, a Bluetooth antenna arranged in the housing, and a Bluetooth chip having a Bluetooth wireless receiving function and an audio processing function. An input end of the Bluetooth chip is electrically connected with the Bluetooth antenna, and an output end of the Bluetooth chip is electrically connected with an input end of the power amplifier module through a wire. An output end of the power amplifier module is electrically connected with the speaker. The arrangement of the sound module is not specifically limited in the present embodiment.

[0047] The implementation principle of the present embodiment is as follows: the first interface 12 is arranged on the energy storage battery device 10, and the second interface 22 is arranged on the expansion device 20. When a user has an expansion demand for the energy storage battery device 10, the first plug-in interface 31 of the cable 30 is directly plugged into the first interface 12, and the second plug-in interface 32 is plugged into the second interface 22. Then, the energy storage battery device 10 and the expansion device 20 are plugged through the cable 30 to realize communication between the energy storage battery device 10 and the expansion device 20. After the identity information and the state information of the expansion device 20 are recognized and detected to be normal, the expansion device 20 is allowed to be coupled into the energy storage battery device 10 in an alternating current coupling manner. The energy storage battery device 10 can charge and discharge the expansion device 20. Thus, the user can install the expansion device 20 on the energy storage battery device 10 by himself / herself, which reduces the electrical safety risk during installation, reduces the installation cost, increases the alternating current discharge power, and enables the expansion device 20 to be removed when necessary and discharged in direct current and alternating current when carried outdoors.

[0048] Any combination of the technical features of the above embodiments can be made. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0049] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A combined energy storage augmentation system, characterized by, The utility model relates to a kind of combined energy storage expansion system, including: Energy storage battery device (10) and expansion device (20); The energy storage battery device (10) includes energy storage battery shell (11), and the inside of energy storage battery shell (11) is provided with energy storage battery group; The expansion device (20) includes expansion shell (21), and the inside of expansion shell (21) is provided with expansion battery group; Wherein, the energy storage battery device (10) and the expansion device (20) are connected by cable (30), and the energy storage battery device (10) can control the expansion device (20) to charge and discharge.

2. The combined energy storage expansion system according to claim 1, wherein, The first interface (12) is connected to the energy storage battery group, and the first interface (12) is arranged on the energy storage battery shell (11); The second interface (22) is connected to the expansion battery group, and the second interface (22) is arranged on the expansion shell (21); The first interface (12) and the second interface (22) are connected by the cable (30).

3. The combined energy storage expansion system according to claim 2, wherein, The first interface (12) and the second interface (22) are both provided with a positive electrode pin (40), a negative electrode pin (50), a ground pin (60) and a plurality of communication pins (70).

4. The combined energy storage expansion system according to claim 3, wherein, One end of the cable (30) is provided with a first plug interface (31) matched with the first interface (12); The other end of the cable (30) is provided with a second plug interface (32) matched with the second interface (22).

5. The combined energy storage expansion system according to claim 2, wherein, A first control circuit board is arranged between the external panel (111) of the energy storage battery shell (11) and the energy storage battery group, and the first control circuit board is connected with the energy storage battery group.

6. The combined energy storage expansion system according to claim 5, wherein, The first interface (12) is exposed and arranged on the external panel (111); The first interface (12) is connected with the first control circuit board.

7. The combined energy storage expansion system according to claim 2, wherein, A second control circuit board is arranged between the back panel (211) of the expansion shell (21) and the expansion battery group, and the second control circuit board is connected with the expansion battery group.

8. The combined energy storage expansion system according to claim 7, wherein, The second interface (22) is exposed and arranged on the back panel (211); The second interface (22) is connected with the second control circuit board.

9. The combined energy storage expansion system according to claim 7 or 8, wherein, The back panel (211) is also provided with a charging socket (23), and the charging socket (23) is connected with the second control circuit board to control the expansion battery group to charge through commercial power.

10. The combined energy storage expansion system according to claim 7 or 8, characterized in that, The back panel (211) is further provided with an alternating current discharge port (24) and / or a direct current discharge port (25); The alternating current discharge port (24) is connected with the second control circuit board, and is used for outputting alternating current; The direct current discharge port (25) is connected with the second control circuit board, and is used for outputting direct current.

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