Energy storage device and energy storage system

Abstract

The utility model discloses an energy storage device and an energy storage system, and belongs to the field of energy storage. The energy storage device comprises a host which comprises a first shell and an inverter installed on the first shell, the side wall of the first shell is provided with a PV terminal and an AC terminal which are electrically connected with the inverter, and the bottom wall of the first shell is provided with a bottom connector; the battery device comprises a second shell, a battery monomer and a PCBA (printed circuit board assembly), the battery monomer and the PCBA are mounted in the second shell, a top connector is arranged on the top wall of the second shell, a bottom connector is arranged on the bottom wall of the second shell, and the top connector is used for being electrically connected with the bottom connector. The inverter is installed on the host, the battery monomer, the DC / DC converter and the battery management module are installed on the battery device, the weight of the host is reduced, transportation is easy, the bottom connector is arranged on the bottom wall of the first shell of the host, the top connector and the bottom connector are arranged on the second shell of the battery device, the battery device can be stacked, and expansibility is good.

Description

Technical Field

[0001] This application belongs to the field of energy storage technology, and in particular relates to an energy storage device and energy storage system. Background Technology

[0002] Existing energy storage devices place the main unit, DC / DC converter, and battery cells in a single housing. These devices are heavy, making them difficult to move and stack, and they also have poor heat dissipation. Furthermore, the inverter boards cannot be wave soldered in one go and require manual soldering afterward, resulting in low reliability. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the related art. To this end, this application proposes an energy storage device and energy storage system that is lightweight and easy to transport.

[0004] In a first aspect, this application provides an energy storage device, comprising:

[0005] The main unit includes a first housing and an inverter mounted on the first housing. The side wall of the first housing is provided with PV terminals and AC terminals that are electrically connected to the inverter, and the bottom wall of the first housing is provided with a bottom connector.

[0006] At least one battery device, the battery device comprising: a second housing, a battery cell and a PCBA installed in the second housing, the top wall of the second housing having a top connector and the bottom wall of the second housing having a bottom connector, the top connector being used for electrical connection with the bottom connector.

[0007] According to the energy storage device of this application, by installing the inverter on the main unit and the battery cells and PCBA on the battery device, the weight of the main unit is reduced, making it easy to transport and disassemble. By setting a bottom connector on the bottom wall of the first housing of the main unit and setting a top connector and a bottom connector on the second housing of the battery device, the battery device can be stacked and expanded, with good scalability.

[0008] According to one embodiment of this application, the first housing includes:

[0009] The first main housing forms a first receiving cavity with an open top, and the PV terminal and the AC terminal are both mounted on the side wall of the first main housing;

[0010] A cover plate is installed at the open end of the first main housing and is provided with a glue filling chamber. The inverter is installed on the cover plate and located in the first receiving cavity.

[0011] According to the energy storage device of this application, by installing the inverter on the cover plate and installing both the PV terminal and the AC terminal on the side wall of the first main housing, the inverter board can be wave soldered in one go, resulting in high inverter reliability.

[0012] According to one embodiment of this application, the cover plate includes:

[0013] The cover plate body is installed at the open end of the first main housing and does not protrude from the first main housing;

[0014] The first heat dissipation fin is connected to the cover plate body and protrudes outward relative to the cover plate body.

[0015] According to the energy storage device of this application, by setting the first heat dissipation fin on the cover plate body, the inverter is installed on the cover plate body, thereby realizing heat dissipation at the top of the host and achieving good heat dissipation effect.

[0016] According to one embodiment of this application, the first main housing has a sinkhole at its open end, and the cover plate is installed in the sinkhole.

[0017] According to the energy storage device of this application, the cover plate can be better accommodated by providing a sink in the first main housing.

[0018] According to one embodiment of this application, at least a portion of the sidewall of the first housing is provided with an inwardly recessed first groove, and at least a portion of the PV terminal and the AC terminal are located within the first groove.

[0019] According to the energy storage device of this application, by providing a first groove on the side wall of the first housing, at least a portion of the PV terminal and the AC terminal are located in the first groove, which reduces the protrusion height of the PV terminal and the AC terminal, reduces the risk of damage, and the semi-concealed structure is neater and more aesthetically pleasing. The first groove can also be used as a handle during transportation.

[0020] According to one embodiment of this application, the second housing includes:

[0021] The second main housing forms a second receiving cavity with an open back, in which the battery cell and the PCBA are both installed;

[0022] The backplate is installed at the open end of the second main housing and has a rearwardly protruding second heat dissipation fin.

[0023] According to the energy storage device of this application, by installing both the battery cell and the PCBA in the second receiving cavity and providing a second heat dissipation fin on the back plate, it is easy to isolate it from the wall and has a good heat dissipation effect.

[0024] According to one embodiment of this application, the PCBA is mounted on the backplane, and the PCBA includes a DC / DC converter and a battery management module.

[0025] According to the energy storage device of this application, by integrating the DC / DC converter and the battery management module into the PCBA and mounting the PCBA on the backplane, the heat dissipation effect of the DC / DC converter and the battery management module is improved.

[0026] According to one embodiment of this application, the bottom wall of the second main housing is provided with an upwardly recessed second groove and a connecting mounting groove, the bottom of the connecting mounting groove being flush with the bottom of the second groove, and the connecting mounting groove being used to install a bottom connector.

[0027] According to the energy storage device of this application, the problem of demolding of the second housing is solved by providing an upwardly recessed second groove on the bottom wall of the second main housing.

[0028] According to one embodiment of this application, at least a portion of the sidewall of the second housing is provided with an inwardly recessed third groove.

[0029] According to the energy storage device of this application, the ease of handling is improved by providing a third groove on the second housing.

[0030] Secondly, this application provides an energy storage system, which includes:

[0031] Photovoltaic systems;

[0032] As described in the above embodiments, the PV terminal is electrically connected to the photovoltaic system.

[0033] According to the energy storage system of this application, by electrically connecting the PV terminal to the photovoltaic system, the electrical energy of the photovoltaic system can be better stored in the energy storage device, which is easy to transport and use and has high reliability.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1 This is a schematic diagram of the energy storage device provided in the embodiments of this application;

[0037] Figure 2 This is one of the structural schematic diagrams of the host provided in the embodiments of this application;

[0038] Figure 3 This is one of the structural schematic diagrams of the battery device provided in the embodiments of this application;

[0039] Figure 4This is a second schematic diagram of the battery device provided in the embodiments of this application;

[0040] Figure 5 This is one of the cross-sectional views of the host provided in the embodiments of this application;

[0041] Figure 6 This is a second schematic diagram of the host structure provided in the embodiments of this application;

[0042] Figure 7 This is a second cross-sectional view of the host provided in the embodiments of this application;

[0043] Figure 8 This is the third cross-sectional view of the host provided in the embodiments of this application;

[0044] Figure 9 This is the third schematic diagram of the battery device provided in the embodiments of this application;

[0045] Figure 10 This is a cross-sectional view of the battery device provided in the embodiments of this application;

[0046] Figure 11 This is the fourth schematic diagram of the battery device provided in the embodiments of this application.

[0047] Figure label:

[0048] Energy storage device 1000;

[0049] Main unit 100, first housing 110, PV terminal 111, AC terminal 112, bottom connector 113, first main housing 114, first receiving cavity 1141, sink 1142, cover plate 115, potting tank 1151, cover plate body 1152, first heat dissipation fin 1153, first groove 116, inverter 120.

[0050] Battery assembly 200, second housing 210, top connector 211, second main housing 212, second receiving cavity 2121, second groove 2122, connecting mounting groove 2123, back plate 213, second heat dissipation fin 2131, third groove 214, battery cell 220, DC / DC converter 230, battery management module 240, PCBA 250. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0052] The principle of the energy storage device 1000 proposed in this application will be explained in detail below:

[0053] In related technologies, energy storage devices are heavy and difficult to transport and stack.

[0054] To address this technical problem, this application provides an energy storage device 1000, as described below. Figures 1-11 This application describes an energy storage device 1000 according to an embodiment of the present application.

[0055] like Figures 1-4 As shown, the energy storage device 1000 of this application embodiment includes: a host 100 and a battery device 200.

[0056] like Figure 5 As shown, the host 100 includes a first housing 110 and an inverter 120.

[0057] The first housing 110 can be made of materials such as aluminum alloy and plastic.

[0058] In this embodiment, the first housing 110 is made of aluminum alloy, which ensures the structural strength of the first housing 110 while effectively reducing the overall weight, making it easy to handle and install, and also has good thermal conductivity.

[0059] Inverter 120 is mounted on first housing 110.

[0060] The inverter 120 can be installed in the first housing 110 by means of connection such as threaded connection, welding and snap-fit ​​connection.

[0061] In this embodiment, a threaded connection is selected for easy assembly and disassembly.

[0062] like Figure 6 and Figure 8 As shown, the side wall of the first housing 110 is equipped with a PV (Photovoltaic) terminal 111 and an AC (Alternating Current) terminal 112.

[0063] PV terminal 111 and AC terminal 112 are electrically connected to inverter 120.

[0064] like Figure 6 As shown, the bottom wall of the first housing 110 is provided with a bottom connector 113.

[0065] like Figure 1 As shown, the number of battery devices 200 is at least one.

[0066] like Figure 3 and Figure 11As shown, the battery device 200 includes: a second housing 210, a battery cell 220, and a PCBA (Printed Circuit Board Assembly) 250.

[0067] The second housing 210 can be made of materials such as aluminum alloy, steel, and composite materials.

[0068] In this embodiment, the second housing 210 is made of aluminum alloy, which ensures the structural strength of the second housing 210 while effectively reducing the overall weight, making it easy to handle and install, and also has good thermal conductivity.

[0069] Both the battery cell 220 and PCBA 250 are installed inside the second housing 210.

[0070] like Figure 3 As shown, the top wall of the second housing 210 is provided with a top connector 211, and the bottom wall of the second housing 210 is provided with a bottom connector 113.

[0071] The top connector 211 is used for electrical connection with the bottom connector 113.

[0072] In this embodiment, the top connector 211 of the second housing 210 can be connected to the bottom connector 113 of the first housing 110 or the bottom connector 113 of the second housing 210 to facilitate the stacking of the host 100 and the battery device 200.

[0073] In this embodiment, the top connector 211 and the bottom connector 113 are floating plugs. Floating plugs can provide a stable power connection while preventing the plug from becoming loose or damaged due to movement.

[0074] It should be noted that in this embodiment, the PV terminal 111 and AC terminal 112 are waterproof terminals, and the top connector 211 and bottom connector 113 are floating waterproof connectors, so that the waterproof rating of the energy storage device 1000 reaches IP65.

[0075] In some embodiments, the top connector 211 and the bottom connector 113 may also be selected with other structures.

[0076] In related technologies, the inverter, PCBA, and battery cells of an energy storage device are housed in a single housing structure. This makes the energy storage device heavy and difficult to transport and stack.

[0077] In this embodiment, the energy storage device 1000 includes only an inverter 120 in the main unit 100 and a battery device 200 including a battery cell 220 and a PCBA 250. The main unit 100 is lightweight and easy to transport and disassemble. The bottom wall of the first housing 110 of the main unit 100 is provided with a bottom connector 113. The second housing 210 of the battery device 200 is provided with a top connector 211 and a bottom connector 113. The battery device 200 can be stacked and expanded, and has good expandability.

[0078] According to the energy storage device 1000 provided in the embodiments of this application, by installing the inverter 120 on the main unit 100 and installing the battery cell 220 and PCBA 250 on the battery device 200, the weight of the main unit 100 is reduced, making it easy to transport and disassemble. By providing a bottom connector 113 on the bottom wall of the first housing 110 of the main unit 100 and a top connector 211 and a bottom connector 113 on the second housing 210 of the battery device 200, the battery device 200 can be stacked and expanded, with good expandability.

[0079] In some embodiments, such as Figure 2 and Figure 5 As shown, the first housing 110 may include: a first main housing 114 and a cover plate 115.

[0080] The first main housing 114 can be made of materials such as aluminum alloy and plastic.

[0081] In this embodiment, the first main housing 114 is made of aluminum alloy, which ensures the structural strength of the first main housing 114 while effectively reducing the overall weight, making it easy to transport and install, and also has good thermal conductivity.

[0082] like Figure 5 As shown, the first main housing 114 includes a first receiving cavity 1141.

[0083] The top of the first receiving cavity 1141 is open.

[0084] Both the PV terminal 111 and the AC terminal 112 are mounted on the side wall of the first main housing 114.

[0085] In this embodiment, the PV terminal 111 and AC terminal 112 adopt a horizontal connector structure, which can make more efficient use of space, has good conductivity and insulation performance, and can be wave soldered in one go without manual soldering.

[0086] It should be noted that in this embodiment, the PV terminal 111 can be connected to a photovoltaic panel, and the AC terminal 112 includes a grid-connected terminal and an off-grid terminal. The grid-connected terminal is used to output electrical energy to the public power grid through the inverter 120, and the off-grid terminal is used to output electrical energy to an independent power grid through the inverter 120.

[0087] The cover plate 115 is installed at the open end of the first main housing 114.

[0088] The cover plate 115 can be made of materials such as aluminum alloy and plastic.

[0089] In this embodiment, the cover plate 115 is made of aluminum alloy, which ensures the structural strength of the cover plate 115 while effectively reducing the overall weight, making it easy to handle and install, and also has good thermal conductivity.

[0090] In some embodiments, the cover plate 115 may also be made of a different material than the first main housing 114.

[0091] The cover plate 115 seals the first receiving cavity 1141 to form a closed cavity.

[0092] The cover plate 115 and the first main housing 114 can be connected in various ways. In this embodiment, the cover plate 115 and the first main housing 114 are connected by a waterproof rubber strip, which has good waterproof and sealing properties and a certain buffering and protection function.

[0093] like Figure 5 and Figure 7 As shown, the cover plate 115 is provided with a glue dispensing chamber 1151.

[0094] The glue potting chamber 1151 is located on the bottom wall of the cover plate 115 facing the first receiving cavity 1141, and is used for heat dissipation of magnetic devices on the inverter 120.

[0095] The inverter 120 is mounted on the cover plate 115 and is located in the first receiving cavity 1141.

[0096] In this embodiment, the front components of the inverter 120 are close to the cover plate 115 for heat dissipation, resulting in good heat dissipation.

[0097] It should be noted that the inverter 120 is installed on the cover plate 115 and is located in the first receiving cavity 1141. This allows the pin-type components on the inverter 120 board to be placed on the front of the board. At the same time, the PV terminal 111 and AC terminal 112 are installed on the side wall of the first main housing 114. The inverter 120 board can be wave soldered in one go without manual soldering, and the inverter 120 has high reliability.

[0098] According to the energy storage device 1000 provided in the embodiments of this application, by installing the inverter 120 on the cover plate 115, and installing the PV terminal 111 and AC terminal 112 on the side wall of the first main housing 114, the inverter 120 single board can be wave soldered in one go, and the inverter 120 has high reliability.

[0099] In some embodiments, such as Figure 5As shown, the cover plate 115 may include: a cover plate body 1152 and a first heat dissipation fin 1153.

[0100] The cover plate body 1152 is installed at the open end of the first main housing 114.

[0101] The cover plate body 1152 does not protrude from the first main housing 114.

[0102] In this embodiment, the cover plate 115 is embedded in the first main housing 114, and the dividing line between the cover plate 115 and the first main housing 114 is not visible on the four sides of the first main housing 114, resulting in better integration of the host 100.

[0103] The first heat dissipation fin 1153 is connected to the cover plate body 1152.

[0104] The first heat dissipation fin 1153 protrudes outward relative to the cover plate body 1152.

[0105] The first heat dissipation fin 1153 can be selected from various structures. In this embodiment, the first heat dissipation fin 1153 is selected from short heat dissipation fins, which have high heat dissipation efficiency, compact structure, small space occupation, and are convenient for installation and use.

[0106] According to the energy storage device 1000 provided in the embodiments of this application, by setting a first heat dissipation fin 1153 on the cover plate body 1152, the inverter 120 is installed on the cover plate body 1152, thereby realizing heat dissipation at the top of the host 100 and achieving good heat dissipation effect.

[0107] In some embodiments, such as Figure 8 As shown, the first main housing 114 may be provided with a sink 1142.

[0108] The sink 1142 is located at the open end of the first main housing 114.

[0109] The cover plate 115 is installed on the settling tank 1142.

[0110] In this embodiment, the depth of the sink 1142 is greater than or equal to the thickness of the cover plate body 1152, and the cover plate 115 is embedded in the first main shell 114, resulting in good integration.

[0111] According to the energy storage device 1000 provided in the embodiments of this application, the cover plate 115 can be better accommodated by providing a sink 1142 in the first main housing 114.

[0112] In some embodiments, such as Figure 2 and Figure 5 As shown, the first housing 110 may be provided with a first groove 116.

[0113] The first groove 116 is located on the side wall of the first housing 110.

[0114] The first groove 116 may be located on a portion of the sidewall of the first housing 110, or the first groove 116 may be located on all the sidewalls of the first housing 110.

[0115] In this embodiment, the first groove 116 is located on two opposite sidewalls of the first housing 110.

[0116] The first groove 116 is recessed inward.

[0117] like Figure 2 and Figure 5 As shown, PV terminal 111 and AC terminal 112 are installed in the first groove 116.

[0118] At least a portion of the PV terminal 111 and the AC terminal 112 are located within the first recess 116.

[0119] In this embodiment, the first groove 116 can be used as a handle during transportation, and the structure is simple.

[0120] According to the energy storage device 1000 provided in the embodiments of this application, by providing a first groove 116 on the side wall of the first housing 110, at least a portion of the PV terminal 111 and the AC terminal 112 are located in the first groove 116, which reduces the outward protrusion height of the PV terminal 111 and the AC terminal 112, reduces the risk of damage, and the semi-concealed structure is neater and more aesthetically pleasing. The first groove 116 can also be used as a handle during transportation.

[0121] In some embodiments, such as Figure 4 As shown, the second housing 210 may include a second main housing 212 and a back plate 213.

[0122] The second main housing 212 can be made of materials such as aluminum alloy, steel, and composite materials.

[0123] In this embodiment, the second main housing 212 is made of aluminum alloy, which ensures the structural strength of the second main housing 212 while effectively reducing the overall weight, making it easy to transport and install, and has good thermal conductivity.

[0124] like Figure 10 As shown, the second main housing 212 includes a second receiving cavity 2121.

[0125] The second receiving cavity 2121 is open at the back.

[0126] Both the battery cell 220 and the PCBA 250 are installed in the second receiving cavity 2121.

[0127] The backplate 213 is installed at the open end of the second main housing 212.

[0128] The backplate 213 can be made of materials such as aluminum alloy and plastic.

[0129] In this embodiment, the back plate 213 is made of aluminum alloy, which ensures the structural strength of the back plate 213 while effectively reducing the overall weight, making it easy to handle and install, and also has good thermal conductivity.

[0130] In some embodiments, the backplate 213 may also be made of a different material than the second main housing 212.

[0131] The back plate 213 seals the second receiving cavity 2121 to form a closed cavity.

[0132] The back plate 213 and the second main housing 212 can be connected in various ways. In this embodiment, the back plate 213 and the second main housing 212 are connected by a waterproof adhesive strip, which has good waterproof and sealing properties and provides a certain degree of buffering and protection.

[0133] like Figure 4 and Figure 9 As shown, the back plate 213 has a rearwardly protruding second heat dissipation fin 2131.

[0134] The second heat dissipation fin 2131 can be selected from various structures. In this embodiment, the second heat dissipation fin 2131 is selected from short heat dissipation fins, which have high heat dissipation efficiency, compact structure, small space occupation, and are convenient for installation and use.

[0135] In this embodiment, the DC / DC converter 230 and the battery management module 240 are closely attached to the back panel 213, resulting in good heat dissipation.

[0136] It should be noted that when the battery device 200 is in use, the second heat dissipation fin 2131 can separate the energy storage device 1000 from the wall, freeing up some heat dissipation space.

[0137] According to the energy storage device 1000 provided in the embodiments of this application, the battery cell 220, DC / DC converter 230 and battery management module 240 are all installed in the second receiving cavity 2121, and the second heat dissipation fin 2131 is provided on the back plate 213, which facilitates separation from the wall and has a good heat dissipation effect.

[0138] In some embodiments, such as Figure 11 As shown, PCBA250 can be mounted on backplane 213.

[0139] PCBA250 may include a DC / DC converter 230 and a battery management module 240.

[0140] In this embodiment, the DC / DC converter 230 and the battery management module 240 are integrated into the PCBA 250 and closely attached to the back panel 213, resulting in good heat dissipation.

[0141] According to the energy storage device 1000 provided in the embodiments of this application, by integrating the DC / DC converter 230 and the battery management module 240 into the PCBA 250 and mounting the PCBA 250 on the back panel 213, the heat dissipation effect of the DC / DC converter 230 and the battery management module 240 is better.

[0142] In some embodiments, such as Figure 9 and Figure 10 As shown, the second main housing 212 may be provided with a second groove 2122 and a connecting mounting groove 2123.

[0143] The second groove 2122 and the connecting mounting groove 2123 are located on the bottom wall of the second main housing 212.

[0144] The second groove 2122 and the connecting mounting groove 2123 are recessed upwards.

[0145] The bottom of the mounting groove 2123 is flush with the bottom of the second groove 2122.

[0146] like Figure 9 As shown, the bottom connector 113 is installed in the connection mounting slot 2123.

[0147] In this embodiment, the connecting mounting groove 2123 is located at one corner of the bottom wall of the second main housing 212, which is easier to process. The connection between the bottom connector 113 and the top connector 211 in the connecting mounting groove 2123 will not affect the top heat dissipation.

[0148] It should be noted that the battery device 200 adopts a structure in which the second main housing 212 is connected to the back plate 213. The opening and closing boundary line of the second housing 210 can be moved back without affecting the integrity and aesthetics. However, there will be a demolding problem. The bottom wall of the second main housing 212 is provided with a second groove 2122, and the bottom of the connecting mounting groove 2123 is flush with the bottom of the second groove 2122. There is no protrusion inside the second housing 210 in the demolding direction, thus solving the demolding problem.

[0149] According to the energy storage device 1000 provided in the embodiments of this application, the problem of demolding of the second housing 210 is solved by providing an upwardly recessed second groove 2122 on the bottom wall of the second main housing 212.

[0150] In some embodiments, such as Figure 10 As shown, the second housing 210 is provided with a third groove 214.

[0151] The third groove 214 is provided on part or all of the sidewall of the second housing 210.

[0152] The third groove 214 is recessed inward.

[0153] The third groove 214 is used as a handle during transportation.

[0154] In this embodiment, the third groove 214 is provided on the two side walls adjacent to the back plate 213, which facilitates transportation and does not affect the heat dissipation effect.

[0155] According to the embodiment of this application, the energy storage device 1000 improves the ease of handling by providing a third groove 214 on the second housing 210.

[0156] In some embodiments, the inverter 120 is installed in the first receiving cavity 1141 of the first main housing 114 of the host 100. The side wall of the first main housing 114 is provided with PV terminal 111 and AC terminal 112. The bottom wall of the first main housing 114 is provided with a bottom connector 113. The battery cell 220, DC / DC converter 230 and battery management module 240 are all installed in the second receiving cavity 2121 of the second main housing 212 of the battery device 200. The top wall of the second main housing 212 is provided with a top connector 211 and the bottom wall of the second main housing 212 is provided with a bottom connector 113. The top connector 211 of the second main housing 212 can be connected to the bottom connector 113 of the first main housing 114 or the bottom connector 113 of the second main housing 212 to facilitate the stacking of the host 100 and the battery device 200.

[0157] The cover plate 115 is embedded in the recess 1142 at the open end of the first main housing 114. The bottom wall of the cover plate 115 facing the first receiving cavity 1141 is provided with a potting chamber 1151. The first heat dissipation fin 1153 is connected to the cover plate body 1152 and the first heat dissipation fin 1153 protrudes outward relative to the cover plate body 1152. The front components of the inverter 120 are in close contact with the cover plate 115 for heat dissipation, resulting in good heat dissipation effect.

[0158] The first housing 110 has two inwardly recessed first grooves 116 on its two opposite side walls, which can be used as handles. The PV terminal 111 and AC terminal 112 are installed in the first grooves 116, reducing the outward protrusion height of the PV terminal 111 and AC terminal 112 and reducing the risk of damage.

[0159] The backplate 213 has a rearward protruding second heat dissipation fin 2131. The DC / DC converter 230 and the battery management module 240 are integrated into the PCBA 250 and closely attached to the backplate 213, resulting in good heat dissipation.

[0160] The bottom wall of the second main housing 212 is provided with an upwardly recessed second groove 2122 and a connecting mounting groove 2123. The bottom of the connecting mounting groove 2123 is flush with the bottom of the second groove 2122. The bottom connector 113 is installed in the connecting mounting groove 2123. There is no protrusion inside the second housing 210 in the draft direction, which solves the draft problem.

[0161] The second housing 210 has a third groove 214 on the two side walls adjacent to the back plate 213, which can be used as a handle.

[0162] In this embodiment, PV terminal 111 and AC terminal 112 are waterproof terminals, and top connector 211 and bottom connector 113 are floating waterproof connectors, so that the waterproof rating of energy storage device 1000 reaches IP65.

[0163] According to the energy storage device 1000 provided in the embodiments of this application, by installing the inverter 120 on the host 100 and installing the battery cell 220, DC / DC converter 230 and battery management module 240 on the battery device 200, the weight of the host 100 is reduced, making it easy to transport and disassemble. By providing a bottom connector 113 on the bottom wall of the first housing 110 of the host 100 and a top connector 211 and a bottom connector 113 on the second housing 210 of the battery device 200, the battery device 200 can be stacked and expanded, with good expandability. By providing top heat dissipation and back heat dissipation structures for the host 100 and the battery device 200 respectively, the heat dissipation effect is good.

[0164] This application also provides an energy storage system.

[0165] The energy storage system includes a photovoltaic system and an energy storage device 1000.

[0166] The energy storage device 1000 is the energy storage device 1000 described in the above embodiment.

[0167] The PV terminal 111 of the energy storage device 1000 is electrically connected to the photovoltaic system.

[0168] According to the energy storage device 1000 provided in the embodiments of this application, by electrically connecting the PV terminal 111 to the photovoltaic system, the electrical energy of the photovoltaic system can be better stored in the energy storage device 1000, which is easy to transport and use and has high reliability.

[0169] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0170] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0171] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0172] In the description of this application, "multiple" means two or more.

[0173] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0174] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0175] Other configurations of the embodiments of this application, such as ... and ..., and operations, are known to those skilled in the art and will not be described in detail here.

[0176] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0177] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage device, characterized in that, include: The main unit includes a first housing and an inverter mounted on the first housing. The side wall of the first housing is provided with PV terminals and AC terminals that are electrically connected to the inverter, and the bottom wall of the first housing is provided with a bottom connector. At least one battery device, the battery device comprising: a second housing, a battery cell and a PCBA installed in the second housing, the top wall of the second housing having a top connector and the bottom wall of the second housing having a bottom connector, the top connector being used for electrical connection with the bottom connector.

2. The energy storage device according to claim 1, characterized in that, The first housing includes: The first main housing forms a first receiving cavity with an open top, and the PV terminal and the AC terminal are both mounted on the side wall of the first main housing; A cover plate is installed at the open end of the first main housing and is provided with a glue filling chamber. The inverter is installed on the cover plate and located in the first receiving cavity.

3. The energy storage device according to claim 2, characterized in that, The cover plate includes: The cover plate body is installed at the open end of the first main housing and does not protrude from the first main housing; The first heat dissipation fin is connected to the cover plate body and protrudes outward relative to the cover plate body.

4. The energy storage device according to claim 2, characterized in that, The first main housing has a sinkhole at its open end, and the cover plate is installed in the sinkhole.

5. The energy storage device according to claim 1, characterized in that, At least a portion of the sidewall of the first housing is provided with an inwardly recessed first groove, and at least a portion of the PV terminal and the AC terminal are located within the first groove.

6. The energy storage device according to any one of claims 1-5, characterized in that, The second housing includes: The second main housing forms a second receiving cavity with an open back, in which the battery cell and the PCBA are both installed; The backplate is installed at the open end of the second main housing and has a rearwardly protruding second heat dissipation fin.

7. The energy storage device according to claim 6, characterized in that, The PCBA is mounted on the backplane, and the PCBA includes a DC / DC converter and a battery management module.

8. The energy storage device according to claim 6, characterized in that, The bottom wall of the second main housing is provided with an upwardly recessed second groove and a connecting mounting groove. The bottom of the connecting mounting groove is flush with the bottom of the second groove. The connecting mounting groove is used to install the bottom connector.

9. The energy storage device according to claim 6, characterized in that, At least a portion of the sidewall of the second housing is provided with an inwardly recessed third groove.

10. An energy storage system, characterized in that, include: Photovoltaic systems; The energy storage device according to any one of claims 1-9, wherein the PV terminal is electrically connected to the photovoltaic system.

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