Energy storage device

Abstract

The utility model relates to energy storage equipment. The energy storage equipment comprises a battery module and a power module which are independently arranged. The battery module comprises a battery box body and a battery module located in the battery box body, the power module comprises a power box body and a power conversion unit located in the power box body, and the battery module is electrically connected with the power conversion unit. The battery module and the power module which are independently arranged are included, the battery module and the power module are arranged in an isolated mode, when any one of the battery module and the power module breaks down, the other module cannot be affected, and reliability is high. The power module comprises the power conversion unit, the battery module comprises the battery module, connection between the battery module and the power module is achieved through connection of the battery module and the power conversion unit, the assembly complexity between the modules is simplified, the assembly difficulty is reduced, the connection efficiency of the energy storage equipment is improved, and meanwhile the energy storage equipment is more compact. And the size of the energy storage equipment is also reduced.

Description

Technical Field

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

[0002] Battery energy storage is an energy storage solution that uses battery technology to store electrical energy so that the stored energy can be output when needed. Storing electrical energy in batteries allows for a rapid response when there is a demand for power, ensuring a stable power supply.

[0003] Energy storage devices in the battery energy storage field mainly include battery modules and power modules. Battery modules store electrical energy, while power modules convert the electrical energy from the battery modules, either by converting the DC power stored in the battery into AC power, or by converting AC power supplied by the power grid into DC power for storage in the battery. However, current energy storage devices often have battery modules and power modules centrally located, leading to mutual interference between modules. Furthermore, these devices are large in size, require complex wiring, and are not portable. Utility Model Content

[0004] Therefore, it is necessary to provide an energy storage device that isolates the battery module and the power module to reduce mutual interference between the modules, and is small in size and easy to connect.

[0005] This disclosure provides an energy storage device, which includes an independently configured battery module and a power module. The battery module includes a battery housing and a battery module located inside the battery housing. The power module includes a power housing and a power conversion unit located inside the power housing. The battery module and the power conversion unit are electrically connected.

[0006] In some embodiments, the power enclosure and the battery enclosure are arranged in sequence along the vertical direction. The power enclosure includes a first connecting surface with a first connecting port, and the battery enclosure includes a second connecting surface with a second connecting port. The first connecting surface and the second connecting surface are arranged opposite to each other, and the arrangement of the second connecting port on the second connecting surface corresponds to the arrangement of the first connecting port on the first connecting surface.

[0007] The battery module includes a battery connector, and the power conversion unit includes a power connector. The battery connector passes through the second connector with the first connector facing the first connector surface. The power connector is connected to the battery connector via a connector wire.

[0008] In some embodiments, the first connection port includes a first signal connection port and a first electrode connection port, wherein the first signal connection port is located at the center of the first connection surface and the first electrode connection port is located at the edge of the first connection surface;

[0009] The second connection port includes a second signal connection port and a second electrode connection port. The second signal connection port is located in the center of the second connection surface and corresponds to the position of the first signal connection port on the first connection surface. The second electrode connection port is located at the edge of the second connection surface and corresponds to the position of the first electrode connection port on the first connection surface.

[0010] In some embodiments, the power connection terminal includes a first signal connection terminal and a first electrode connection terminal; the battery connection terminal includes a second signal connection terminal and a second electrode connection terminal, the second signal connection port is provided with a signal connection board, and the connection line includes a signal connection line and an electrode connection line; the second signal connection terminal is connected to a first end of the signal connection board, and the second end of the signal connection board is connected to the first signal connection terminal through a signal connection line; the second electrode connection terminal passes through the second electrode connection port and the first electrode connection port in sequence toward the first connection surface, and is connected to the first electrode connection terminal through an electrode connection line, and the signal connection board seals the second signal connection port.

[0011] In some embodiments, one end of the signal connection cable is provided with a male connector and the other end is provided with a female connector. Both the first signal connection end and the second end of the signal connection board are provided with male or female connectors that match the end of the signal connection cable. One end of the signal connection cable is plugged into the first signal connection end, and the other end of the signal connection cable is plugged into the second end of the signal connection board.

[0012] In some embodiments, the circumferential sidewall of the battery housing extends into a second connecting surface in the direction of the first connecting surface, forming a first cavity with the second connecting surface, and the battery connection end is accommodated in the first cavity.

[0013] In some embodiments, the power enclosure includes a first heat dissipation surface, which is the rear sidewall of the power enclosure.

[0014] In some embodiments, the first heat dissipation surface is provided with a first ventilation structure and a second ventilation structure, which are arranged sequentially in a vertical direction, and a wind baffle is provided between the first ventilation structure and the second ventilation structure; the power conversion unit is provided with a first heat dissipation structure corresponding to the position of the first ventilation structure and a second heat dissipation structure corresponding to the position of the second ventilation structure; the first ventilation structure forms a first air duct inclined towards the inside of the power housing, the first heat dissipation structure forms a second air duct upward in a vertical direction, the second heat dissipation structure forms a third air duct facing outward of the power housing, and the second ventilation structure and the wind baffle form a fourth air duct; the first air duct, the second air duct, the third air duct and the fourth air duct are connected.

[0015] In some embodiments, the battery housing includes a second heat dissipation surface, which is the rear sidewall of the battery housing. A fifth air duct is formed on the outer side of the second heat dissipation surface, and the fifth air duct is connected to the first air duct, the second air duct, the third air duct, and the fourth air duct.

[0016] In some embodiments, the energy storage device further includes a housing that opens toward the back wall side of the energy storage device, the housing forming a second cavity in which a battery module and a power module are disposed;

[0017] The outer casing has a first air inlet and a first air outlet. The first air inlet is located on the bottom surface of the outer casing and on the edge of the bottom surface of the outer casing, near the back of the battery box, forming a sixth air duct that flows towards the battery box. The first air outlet is located on the top surface of the outer casing and on the edge of the top surface of the outer casing, near the back of the power box, forming a seventh air duct that flows out of the power box. The first air duct, the second air duct, the third air duct, the fourth air duct, the fifth air duct, the sixth air duct, and the seventh air duct are connected.

[0018] In some embodiments, the energy storage device is provided with a mounting component, which is disposed on the battery housing. The battery module includes an end plate, which is disposed on the top and bottom surfaces of the battery module. The mounting component passes through the battery housing via a connector to be fixedly connected to the end plate of the battery module.

[0019] In some embodiments, the housing further includes a first vent, which is located at the center of the bottom surface of the housing and extends through the bottom surface of the housing along the thickness direction; the battery box includes a second vent at the center of the bottom, and the first vent and the second vent are connected.

[0020] In some embodiments, the housing also includes at least one support base disposed on the outer side of the bottom surface of the housing.

[0021] The energy storage device disclosed herein includes independently configured battery modules and power modules. The battery module includes a battery housing and battery modules located inside the battery housing. The power module includes a power housing and a power conversion unit located inside the power housing. The battery modules and power conversion unit are electrically connected. This disclosure includes independently configured battery modules and power modules, isolating them so that a failure in either module will not affect the other, resulting in high reliability. The power module of this application includes a power conversion unit, and the battery module includes battery modules. The connection between the battery module and the power module is achieved through the electrical connection between the battery module and the power conversion unit, simplifying the assembly complexity between the battery module and the power module. The energy storage device of this application has simple wiring and low assembly difficulty, improving the connection efficiency of the energy storage device while reducing its size. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an energy storage device according to one embodiment;

[0024] Figure 2 This is a schematic diagram of a power enclosure according to one embodiment;

[0025] Figure 3 This is a schematic diagram of a battery housing according to one embodiment;

[0026] Figure 4 This is a schematic diagram of the second connecting surface in one embodiment;

[0027] Figure 5 This is a schematic diagram of the heat dissipation surface of the power enclosure and the heat dissipation surface of the battery enclosure in an embodiment of an energy storage device;

[0028] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0029] Figure 7 This is a schematic diagram of the outer casing of an energy storage device according to one embodiment;

[0030] Figure 8 This is a schematic diagram of the bottom surface of the outer casing of an energy storage device according to an embodiment.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Power module; 110. Power enclosure; 112. First connection surface; 114. First connection port; 1142. First signal connection port; 1144. First electrode connection port; 116. First heat dissipation surface; 1162. First ventilation structure; 1164. Second ventilation structure; 1166. Windshield; 1182. First heat dissipation structure; 1184. Second heat dissipation structure; 120. Power conversion unit;

[0033] 20. Battery module; 210. Battery housing; 212. Second connection surface; 214. Second connection port; 2142. Second signal connection port; 2144. Second electrode connection port; 216. Second heat dissipation surface; 218. Battery connection end; 2182. Second signal connection end; 2184. Second electrode connection end; 220. Battery module;

[0034] 30. Outer casing; 312. First air inlet; 314. First air outlet; 316. First vent; 318. Support base; 40. Mounting component; 510. First air duct; 520. Second air duct; 530. Third air duct; 540. Fourth air duct; 550. Fifth air duct; 560. Sixth air duct; 570. Seventh air duct. Detailed Implementation

[0035] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0037] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0038] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0039] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0040] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0041] This addresses the problems of existing energy storage devices where battery modules and power modules are centrally located, leading to mutual interference during operation, complex wiring, and large device size. For example... Figure 1 As shown, some embodiments disclose an energy storage device that separates the battery module and power module, resulting in simple connection and a small overall size. For example... Figure 1 As shown, the energy storage device includes a separately configured battery module 20 and a power module 10. The power module 10 includes a power housing 110 and a power conversion unit 120 located inside the power housing 110. The battery module 20 includes a battery housing 210 and a battery module 220 located inside the battery housing 210. The battery module 220 and the power conversion unit 120 are electrically connected.

[0042] In this embodiment, both the power module 10 and the battery module 20 are independently housed in power enclosures 110 and 210, respectively. This isolates the power module 10 and battery module 20, ensuring that a failure in either module will not affect the others, thus improving the reliability of the energy storage device. The power module 10 includes a power conversion unit 120, and the battery module 20 includes a battery module 220. When assembling the power module 10 and battery module 20 to form the energy storage device, connecting the power conversion unit 120 and the battery module 220 simplifies the assembly complexity between the modules, reduces assembly difficulty, and improves the connection efficiency of the energy storage device.

[0043] In some specific embodiments, the power housing 110 and the battery housing 210 are arranged sequentially along the vertical direction. Please continue to refer to... Figure 1 In this embodiment, the power housing 110 and the battery housing 210 are arranged sequentially along the vertical direction, i.e., the Z-axis direction shown in the figure. Since the heat generated by the power module 10 is much greater than that of the battery module 20, in this embodiment, the power module 10 is positioned above the battery module 20 to ensure that the energy storage device can operate reliably and stably.

[0044] Please refer to Figure 2 The schematic diagram of the power enclosure 110 shown is as follows: Figure 2 As shown, the power enclosure 110 includes a first connection surface 112 with a first connection port 114. Please refer to... Figure 3 The schematic diagram of the battery housing 210 shown is as follows: Figure 3 As shown, the battery housing 210 includes a second connecting surface 212 with a second connecting port 214. Combined with... Figures 1 to 3As can be seen, the first connecting surface 112 and the second connecting surface 212 are arranged opposite to each other. The arrangement of the second connecting port 214 on the second connecting surface 212 corresponds to the arrangement of the first connecting port 114 on the first connecting surface 112. The first connecting port 114 and the second connecting port 214 are positioned accordingly to facilitate the connection between the battery module 220 and the power conversion unit 120, thereby improving the connection efficiency between the battery module 20 and the power module 10.

[0045] Please continue to refer to Figure 2 and Figure 3 The first connecting surface 112 is the surface where the power housing 110 connects to the battery housing 210, and the second connecting surface 212 is the surface where the battery housing 210 connects to the power housing 110. In this embodiment, the power housing 110 and battery housing 210 are arranged vertically. The first connecting surface 112 can be considered as the bottom surface of the power housing 110, that is, the end face of the power housing 110 facing the opposite direction of the Z-axis. The second connecting surface 212 is the top surface of the battery housing 210, that is, the end face of the battery housing 210 facing the Z-axis. The first connecting surface 112 of the power housing 110 is provided with a first connecting port 114, and the second connecting surface 212 of the battery housing 210 is provided with a second connecting port 214.

[0046] The battery module 220 includes a battery connection terminal 218, and the power conversion unit 120 includes a power connection terminal. The battery connection terminal 218 passes through the second connection port 214 facing the first connection surface 112. The power connection terminal is connected to the battery connection terminal 218 via a connecting wire.

[0047] In this embodiment, the power conversion unit 120 and the battery module 220 are connected by a connecting wire, one end of which is connected to the battery connection terminal 218 of the battery module 220. The battery connection terminal 218 passes through the second connection port 214 of the battery housing 210. In some implementations, the other end of the connecting wire may also pass through the first connection port 114 on the power housing 110 and be connected to the power connection terminal.

[0048] This embodiment provides a first connection port 114 on the power housing 110 for passing through a connecting wire or a battery connection terminal 218, and a second connection port 214 on the battery housing 210 for passing through a battery connection terminal 218. By passing the battery connection terminal 218 through the second connection port 214 and protruding out of the battery housing 210, the battery module 220 can be easily connected to the power conversion unit 120. This is simple to operate and easy to install, and greatly improves the assembly efficiency of the power module 10 and the battery module 20.

[0049] In some other embodiments, since the arrangement of the first connection port 114 on the first connection surface 112 corresponds to the arrangement of the second connection port 214 on the second connection surface 212, the battery connection end 218 protruding from the battery housing 210 can also pass through the first connection port 114 and connect to the power connection end inside the power housing 110.

[0050] Please continue to refer to Figure 2 and Figure 3 In some specific embodiments, the first connection port 114 includes a first signal connection port 1142 and a first electrode connection port 1144. The first signal connection port 1142 is located at the center of the first connection surface 112, and the first electrode connection port 1144 is located at the edge of the first connection surface 112, close to the sides of the power housing 110 on both sides of the Y-axis and the opposite Y-axis. The second connection port 214 includes a second signal connection port 2142 and a second electrode connection port 2144. The second signal connection port 2142 is located at the center of the second connection surface 212 and corresponds to the position of the first signal connection port 1142 on the first connection surface 112. The second electrode connection port 2144 is located at the edge of the second connection surface 212, close to the sides of the battery housing 210 on both sides of the Y-axis and the opposite Y-axis, and corresponds to the position of the first electrode connection port 1144 on the first connection surface 112.

[0051] The power module 10 can convert the electrical energy of the battery module 20, converting the DC power from the battery module 220 in the battery module 20 into AC power for output, or converting external AC power into DC power for storage in the battery module 220. Furthermore, battery signals such as voltage and current of the battery module 220 are also transmitted through the power module 10. Therefore, the first connection port 114 on the power housing 110 includes a first electrode connection port 1144 for transmitting electrical energy and a first signal connection port 1142 for transmitting battery signals. Correspondingly, the second connection port 214 on the battery housing 210 also includes a second electrode connection port 2144 for transmitting electrical energy and a second signal connection port 2142 for transmitting battery signals.

[0052] In some specific embodiments, the power connection terminal includes a first signal connection terminal and a first electrode connection terminal. The battery connection terminal 218 includes a second signal connection terminal 2182 and a second electrode connection terminal 2184. The second signal connection port 2142 is provided with a signal connection board. The connection lines include signal connection lines and electrode connection lines. The second signal connection terminal 2182 is connected to a first end of the signal connection board, and the second end of the signal connection board is connected to the first signal connection terminal via a signal connection line. The second electrode connection terminal 2184 passes sequentially through the second electrode connection port 2144 and the first electrode connection port 1144 towards the first connection surface 212, and is connected to the first electrode connection terminal via an electrode connection line. The signal connection board seals the second signal connection port 2142.

[0053] Please continue to refer to Figure 2 and Figure 3 The connection between the power conversion unit 120 and the battery module 220 includes signal connection and electrode connection. Specifically, the power conversion unit 120 and the battery module 220 transmit signals such as battery voltage and current through signal connection, and transmit battery electrical energy through electrode connection.

[0054] Correspondingly, the power connection terminal includes a first signal connection terminal and a first electrode connection terminal, and the battery connection terminal 218 includes a second signal connection terminal 2182 and a second electrode connection terminal 2184; the first signal connection terminal and the second signal connection terminal 2182 are connected by a signal connection line, and the first electrode connection terminal and the second electrode connection terminal 2184 are connected by an electrode connection line.

[0055] Specifically, the electrode connection wire is connected to the first electrode connection end inside the power housing 110, and the second electrode connection end 2184 passes through the second electrode connection port 2144 and the first electrode connection port 1144 in sequence and extends into the interior of the power housing 110 to connect with the electrode connection wire.

[0056] After the signal connection cable is connected to the first signal connection terminal inside the power housing 110, it is connected to the signal connection board in the second signal connection port 2142 via the signal connection cable. The end face of the signal connection board facing the inside of the battery housing 210 is connected to the second signal connection terminal 2182. The signal connection board connects the first signal connection terminal and the second signal connection terminal 2182 via the signal connection cable and seals the second signal connection port 2142, thereby sealing the battery housing 210. This isolates the battery module 20 and the power module 10, preventing interference between them. It is understood that, for ease of connection, the signal connection board can be passed through the first signal connection port 1142 and connected to the signal connection cable inside the power housing 110, or the signal connection cable can be led out of the power housing 110 and connected to the signal connection board; this application does not limit this.

[0057] Please refer to Figure 4 The diagram shows the second connection surface 212. A signal connection board is disposed in the second signal connection port 2142 for transmitting signals such as voltage, current, and temperature between the power conversion unit 120 and the battery module 220. One end of the signal connection board facing the first connection surface 112 is connected to one end of the signal connection line, and the other end of the signal connection line is connected to the first signal connection terminal. The end of the signal adapter board facing the inside of the battery module 220 is connected to the second signal connection terminal 2182, and the second signal connection terminal 2182 is connected to the signal acquisition terminal of each battery cell in the battery module 220 through a signal acquisition line.

[0058] Please continue to refer to Figure 4The battery module 220 includes an end plate, which is disposed on the end face of the battery module 220 in the Z-axis direction and the opposite direction of the Z-axis. Due to the arrangement of the individual battery cells in the battery module 220, the signals from the battery module 220 are led out through the second signal connection terminal 2182 on the Z-axis end plate. The positive and negative electrodes of the battery module 220 are led out through the second electrode connection terminal 2184 on the Z-axis end plate. The second signal connection terminal 2182 is disposed in the center of the end plate, and the second electrode connection terminal 2184 is disposed at the edge of the end plate. Therefore, in this embodiment, a second signal connection port 2142 and two second electrode connection ports 2144 are respectively provided at the center and edge of the second connection surface 212 of the battery housing 210, and a first signal connection port 1142 and two first electrode connection ports 1144 are respectively provided at the center and edge of the first connection surface 112 of the power housing 110, so as to facilitate the connection between the second signal connection terminal 2182 and the second electrode connection terminal 2184 in the battery module 220 and the first signal connection terminal and the first electrode connection terminal in the power conversion unit 120.

[0059] In other embodiments, the end plates at both ends of the battery module 220 can also be used to connect the installation device of the energy storage device to improve the stability of the connection of the installation device. The description of the installation of the energy storage device will be described in detail in the following embodiments.

[0060] It can be understood that the second electrode connection terminal 2184 on the battery module 220 includes a positive electrode connection terminal and a negative electrode connection terminal, and two second electrode connection ports 2144 are correspondingly provided on the second connection surface 212. The two second electrode connection ports 2144 are symmetrically distributed on the two edges of the second connection surface 212, close to the end faces of the battery module 220 in the Y-axis and opposite directions of the Y-axis. The second signal connection port 2142 is located in the center of the second connection surface 212, and the second signal connection terminal 2182 summarizes and outputs the voltage, current and other signals of each battery cell in the battery module 220.

[0061] In this embodiment, when connecting the power conversion unit 120 and the battery module 220, the second signal connection terminal 2182 can be connected to the first signal connection terminal of the power conversion unit 120 only through a signal connection line, and the second electrode connection terminal 2184 can be connected to the first electrode connection terminal of the power conversion unit 120 through an electrode connection line.

[0062] The connection between the power conversion unit 120 and the battery module 220 in this embodiment is simple and easy to implement, which can greatly improve the assembly efficiency of the power module 10 and the battery module 20.

[0063] In some other embodiments, one end of the signal connection cable is provided with a male connector and the other end is provided with a female connector. Both the first signal connection end and the second end of the signal connection board are provided with male or female connectors that match the end of the signal connection cable. One end of the signal connection cable is plugged into the first signal connection end, and the other end of the signal connection cable is plugged into the second end of the signal connection board.

[0064] Male and female connectors represent different types of connection terminals in signal cables. Connection is typically achieved through a plug-in process. A male connector usually has a protruding portion that inserts into a female connector. A female connector usually has a recessed or jack-like opening to receive the pins of the male connector. The use of male and female connectors facilitates the connection and disconnection of signal cables, prevents reverse connections, and improves connection stability.

[0065] Referring to the foregoing example, the second end of the signal connection board is the end face of the signal connection board facing the second connection surface 112. The first signal connection terminal is plugged into the male or female connector of the signal connection cable, and the second end of the signal connection board is plugged into the female or male connector of the signal connection cable, thus connecting the first signal connection terminal to the second end of the signal connection board. This embodiment improves the stability of the signal connection by connecting the first signal connection terminal to the signal connection board through the plugging of the male and female connectors.

[0066] Furthermore, since the positions of the first signal connection port 1142 and the second signal connection port 2142 correspond, the signal connection board can be directly passed through the first signal connection port 1142 and extended into the power box 110, and plugged into the connector led out by the signal connection line of the first signal connection end to realize the connection between the first signal connection end and the signal connection board, thereby realizing the connection between the first signal connection end and the second signal connection end 2182.

[0067] In other embodiments, please continue to refer to Figure 1 and Figure 3 The circumferential sidewall of the battery housing 210 extends towards the first connecting surface 112 to form a second connecting surface 212, which together with the second connecting surface 212 forms a first cavity. The battery connection end 218 is accommodated in the first cavity.

[0068] like Figure 1 As shown, the circumferential sidewall of the battery housing 210 extends towards the Z-axis and is offset from the second connecting surface 212 of the battery housing 210, such that the second connecting surface 212 is lower than the top of the circumferential sidewall of the battery housing 210. This creates a first cavity that opens towards the first connecting surface 112 between the circumferential sidewall of the battery housing 210 and the second connecting surface 212. Figure 3It can be seen that the signal connection board and the second electrode connection terminal 2184 are both housed in the first cavity, wherein the second electrode connection terminal 2184 extends through the first cavity into the power box 110.

[0069] Since both the signal connection board and the second electrode connection end 2184 extend beyond the second connection surface 212, the first cavity protects the battery connection end 218 when connecting the battery module 220 to the power conversion unit 120, preventing the battery connection end 218 from protruding from the second connection surface 212 and affecting the connection between the battery module 220 and the power conversion unit 120. Furthermore, when assembling the power housing 110 and the battery housing 210, the circumferential sidewall of the first cavity can be located on the outside of the circumferential sidewall of the power housing 110 to limit and reinforce the power housing 110, improving assembly efficiency and increasing assembly reliability.

[0070] Figure 5 The diagram shows the heat dissipation surface of the power housing 110 and the battery housing 210 of the energy storage device. Figure 5 As shown, in some other embodiments, the power enclosure 110 includes a first heat dissipation surface 116. The first heat dissipation surface 116 is the rear sidewall of the power enclosure 110. Figure 5 The Y-axis represents the length of the energy storage device, the Z-axis represents the height of the energy storage device, and the X-axis represents the thickness of the energy storage device. To improve the heat dissipation efficiency of the power housing 110, the first heat dissipation surface 116 is provided with a first ventilation structure 1162 and a second ventilation structure 1164. The first ventilation structure 1162 and the second ventilation structure 1164 are arranged sequentially along the vertical direction. A windbreak 1166 is provided between the first ventilation structure 1162 and the second ventilation structure 1164.

[0071] like Figure 5 As shown, the first ventilation structure 1162 and the second ventilation structure 1164 are arranged sequentially along the Z-axis, and are different ventilation structures provided on the heat dissipation surface of the power housing 110. A baffle 1166 is provided between the first ventilation structure 1162 and the second ventilation structure 1164. For example, the first ventilation structure 1162 and the second ventilation structure 1164 can each have an air outlet and an air inlet, respectively. The baffle 1166 provided between the first ventilation structure 1162 and the second ventilation structure 1164 can prevent interference between the two structures and avoid affecting their respective ventilation effects.

[0072] Figure 6 for Figure 5 A schematic diagram of the section along the AA direction, i.e., a section along the XZ plane of the coordinate system shown in the diagram. Please refer to... Figure 6As shown, the power conversion unit 120 is provided with a first heat dissipation structure 1182 corresponding to the position of the first ventilation structure 1162, and a second heat dissipation structure 1184 corresponding to the position of the second ventilation structure 1164. The first heat dissipation structure 1182 and the second heat dissipation structure 1184 dissipate the heat generated by the power conversion unit 120 through different heat dissipation structures, thereby improving heat dissipation efficiency and ensuring the normal operation of the power conversion unit 120. The first ventilation structure 1162 corresponds to the first heat dissipation structure 1182, thereby improving the heat dissipation efficiency of the first heat dissipation structure 1182; the second ventilation structure 1164 corresponds to the second heat dissipation structure 1184, thereby improving the heat dissipation efficiency of the second heat dissipation structure 1184. For example, the first heat dissipation structure 1182 can be a cooling fan, and the second heat dissipation structure 1184 can be a heat dissipation fin. The cooling fan dissipates heat generated inside the power housing 110 and the battery housing 210 by accelerating the airflow.

[0073] Please continue to refer to Figure 6 The first ventilation structure 1162 forms a first air duct 510 inclined towards the inside of the power box 110, the first heat dissipation structure 1182 forms a second air duct 520 vertically upward, the second heat dissipation structure 1184 forms a third air duct 530 facing the outside of the power box 110, the second ventilation structure 1164 and the wind baffle 1166 form a fourth air duct 540, which is also vertically upward; the first air duct 510, the second air duct 520, the third air duct 530 and the fourth air duct 540 are connected.

[0074] like Figure 6 As shown, in the heat dissipation path of the power module 10, the first ventilation structure 1162 serves as an air inlet, introducing outside air into the power module 10 through the first air duct 510. The air enters the first heat dissipation structure 1182 through the first air duct 510, accelerating air exchange within the first heat dissipation structure 1182 and dissipating the heat accumulated by the electronic components inside the power conversion unit 120. The first heat dissipation structure 1182 is connected to the second heat dissipation structure 1184, and the second air duct 520 is connected to the third air duct 530, allowing air to flow from the second air duct 520 to the third air duct 530, and then be transferred to the second ventilation structure 1164 within the second heat dissipation structure 1184, finally exiting the power module 10 through the fourth air duct 540.

[0075] Please continue to refer to Figure 6 In some embodiments, the battery housing 210 includes a second heat dissipation surface 216. The second heat dissipation surface 216 is the rear sidewall of the battery housing 210. A fifth air duct 550 is formed on the outer side of the second heat dissipation surface 216. The fifth air duct 550 communicates with the first air duct 510, the second air duct 520, the third air duct 530, and the fourth air duct 540.

[0076] The fifth air duct 550 is connected to the first air duct 510, the second air duct 520, the third air duct 530, and the fourth air duct 540 formed outside the power housing 110. Heat generated inside the battery housing 210 is dissipated through these air ducts. When the power conversion unit 120 includes a fan as its heat dissipation structure, the fan blows air through the air ducts, creating negative pressure within the heat dissipation air ducts to draw in external air for heat dissipation.

[0077] Please continue to refer to Figure 5 In other embodiments, the energy storage device includes a mounting member 40, which is disposed on the battery housing 210. The mounting member 40 passes through the battery housing 210 via a connector to be fixedly connected to the end plate of the battery module 220.

[0078] Mounting component 40 can be a wall mount. In this embodiment, the energy storage device is installed using mounting component 40 to improve its reliability during use. Depending on the application scenario, the energy storage device can be fixed to a wall or other vertical surface using mounting component 40, forming a wall-mounted installation. The bottom of the wall-mounted energy storage device is suspended. In some other implementations, the energy storage device can also be floor-mounted. Floor-mounted energy storage devices also need to be fixed to a wall or other vertical surface using mounting component 40, with the bottom also in contact with the ground surface.

[0079] As shown in the previous embodiment, the end plate is a connecting plate provided on the end face of the battery module 220 facing the Z-axis direction and the opposite direction of the Z-axis. The mounting member 40 is located on the outside of the battery box 210 and is fixedly connected to the end plate of the battery module 220 through the connector passing through the battery box 210, so that the installation of the energy storage device can be supported by the end plate, resulting in higher stability.

[0080] Figure 7 This is a schematic diagram of the housing 30 of an energy storage device in one embodiment. For example... Figure 7 As shown, in some embodiments, the energy storage device further includes a housing 30 with an opening facing the back wall side of the energy storage device. The housing 30 forms a second cavity, in which the battery module 20 and the power module 10 are housed.

[0081] The power module 10 and the battery module 20 are disposed in the housing 30 to form an energy storage device. The back wall of the energy storage device is provided with an opening, and the first heat dissipation surface 116 of the power housing 110 and the second heat dissipation surface 216 of the battery housing 210 are arranged facing the opening of the housing 30, which can improve the heat dissipation efficiency of the power housing 110 and the battery housing 210.

[0082] Figure 8 The diagram shown is a bottom view of the casing 30 of an energy storage device according to an embodiment. Please refer to... Figures 6 to 8The outer casing 30 is provided with a first air inlet 312 and a first air outlet 314. The first air inlet 312 is located on the bottom surface of the outer casing 30, at the edge of the bottom surface, near the back of the power housing 110, forming a sixth air duct 560 flowing towards the battery housing 210, facilitating communication with the fifth air duct 550 formed on the outer side of the second heat dissipation surface 216. The first air outlet 314 is located on the top surface of the outer casing 30, at the edge of the top surface, near the back of the power housing 110, forming a seventh air duct 570 flowing out of the power housing 110, facilitating communication with the second ventilation structure 1164 and the wind deflector 1166 to form a fourth air duct 540. Thus, the first air duct 510, the second air duct 520, the third air duct 530, the fourth air duct 540, the fifth air duct 550, the sixth air duct 560, and the seventh air duct 570 are connected.

[0083] When the energy storage device is installed on a wall or other vertical surface, the openings of the outer casing 30 extend outwards towards the wall or other vertical surface, forming a closed air duct between the energy storage device and the vertical surface. Referring to the previous example, airflow is created within the air duct by a fan or other cooling device, generating negative pressure that draws external air into the air duct through the first air inlet 312. Heat generated within the battery housing 210 and power housing 110 is transferred through the air and discharged through the first air outlet 314. Therefore, the first air inlet 312 is located on the bottom surface of the outer casing 30, and the first air outlet 314 is located on the top surface of the outer casing 30. The arrangement of the first air inlet 312 and the first air outlet 314 connects the first air duct 510, the second air duct 520, the third air duct 530, the fourth air duct 540, the fifth air duct 550, the sixth air duct 560, and the seventh air duct 570, forming a heat dissipation channel inside the energy storage device. Since a closed air duct is formed between the energy storage device and the facade, the fourth air duct 540 and the fifth air duct 550 are vertically upwards, and air enters the energy storage device from the sixth air duct 560. The fifth air duct 550 is used to dissipate heat from the battery module 220. Combined with the first air duct 510, the second air duct 520, the third air duct 530 and the fourth air duct 540 of the power box 110, the air flows out of the energy storage device from the seventh air duct 570, realizing the circulating heat dissipation within the energy storage device.

[0084] Please continue to refer to Figure 8 In some other embodiments, the housing 30 further includes a first vent 316, which is located at the center of the bottom surface of the housing 30. The first vent 316 is disposed on the bottom surface of the housing 30 and penetrates the bottom surface of the housing 30 along the thickness direction of the bottom surface of the housing 30. The battery box 210 includes a second vent at the center of the bottom, and the first vent 316 communicates with the second vent.

[0085] In this embodiment, a second vent is provided at the bottom of the battery housing 210. When the pressure inside the battery module 220 exceeds a safety threshold, the second vent valve automatically opens to release excess gas, improving the safety of the battery module 220. The bottom surface of the outer casing 30 is provided with a first vent 316 that communicates with the second vent, facilitating the timely discharge of gas released from the second vent into the energy storage device and improving the stability of the energy storage device.

[0086] Please continue to refer to Figure 8 In some other embodiments, the housing 30 further includes at least one support base 318, which is disposed on the outer side of the bottom surface of the housing 30. Furthermore, there can be multiple support bases 318, which, when evenly distributed on the outer side of the bottom surface of the housing 30, allow the energy storage device to be placed directly on the ground.

[0087] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least some embodiments or examples of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An energy storage device, characterized by, The energy storage device comprises a battery module (20) and a power module (10) arranged independently, the battery module (20) comprises a battery box (210) and a battery module (220) arranged inside the battery box (210); the power module (10) comprises a power box (110) and a power conversion unit (120) arranged inside the power box (110); the battery module (220) and the power conversion unit (120) are electrically connected.

2. The energy storage device of claim 1, wherein, The power box (110) and the battery box (210) are arranged in sequence along the vertical direction, the power box (110) comprises a first connecting surface (112) provided with a first connecting port (114), the battery box (210) comprises a second connecting surface (212) provided with a second connecting port (214), the first connecting surface (112) and the second connecting surface (212) are arranged oppositely, and the second connecting port (214) is arranged correspondingly according to the arrangement of the first connecting port (114) on the first connecting surface (112) on the second connecting surface (212). The battery module (220) comprises a battery connecting end (218), the power conversion unit (120) comprises a power connecting end, and the battery connecting end (218) passes through the second connecting port (214) towards the first connecting surface (112); the power connecting end is connected with the battery connecting end (218) through a connecting line.

3. The energy storage device of claim 2, wherein, The first connecting port (114) comprises a first signal connecting port (1142) and a first electrode connecting port (1144), the first signal connecting port (1142) is arranged at the center of the first connecting surface (112), and the first electrode connecting port (1144) is arranged at the edge of the first connecting surface (112); The second connecting port (214) comprises a second signal connecting port (2142) and a second electrode connecting port (2144), the second signal connecting port (2142) is arranged at the center of the second connecting surface (212) and corresponds to the position of the first signal connecting port (1142) on the first connecting surface (112); and the second electrode connecting port (2144) is arranged at the edge of the second connecting surface (212) and corresponds to the position of the first electrode connecting port (1144) on the first connecting surface (112).

4. The energy storage device of claim 3, wherein, The power connecting end comprises a first signal connecting end and a first electrode connecting end; the battery connecting end (218) comprises a second signal connecting end (2182) and a second electrode connecting end (2184), the second signal connecting port (2142) is provided with a signal connecting plate, and the connecting line comprises a signal connecting line and an electrode connecting line; The second signal connection end (2182) is connected with the first end of the signal connection plate, the second end of the signal connection plate is connected with the first signal connection end through a signal connection line; the second electrode connection end (2184) passes through the second electrode connection port (2144) and the first electrode connection port (1144) in sequence towards the first connection surface (112), and is connected with the first electrode connection end through an electrode connection line; the signal connection plate seals the second signal connection port (2142).

5. The energy storage device of claim 4, wherein, One end of the signal connection line is provided with a male connector, and the other end is provided with a female connector, the first signal connection end and the second end of the signal connection plate are provided with a male connector or a female connector matched with the end of the signal connection line; one end of the signal connection line is inserted into the first signal connection end, and the other end of the signal connection line is inserted into the second end of the signal connection plate.

6. The energy storage device of claim 2, wherein, The circumferential side wall of the battery box (210) extends out of the second connection surface (212) towards the first connection surface (112), forms a first cavity with the second connection surface (212), and the battery connection end (218) is contained in the first cavity.

7. The energy storage device of claim 1, wherein, The power box (110) comprises a first heat dissipation surface (116), and the first heat dissipation surface (116) is a back side wall of the power box (110).

8. The energy storage device of claim 7, wherein, The first heat dissipation surface (116) is provided with a first ventilation structure (1162) and a second ventilation structure (1164), the first ventilation structure (1162) and the second ventilation structure (1164) are arranged in sequence along the vertical direction, and a wind blocking piece (1166) is arranged between the first ventilation structure (1162) and the second ventilation structure (1164); the power conversion unit (120) is provided with a first heat dissipation structure (1182) corresponding to the position of the first ventilation structure (1162), and a second heat dissipation structure (1184) corresponding to the position of the second ventilation structure (1164); the first ventilation structure (1162) forms a first air duct (510) inclined to the inside of the power box (110), the first heat dissipation structure (1182) forms a second air duct (520) upward along the vertical direction, the second heat dissipation structure (1184) forms a third air duct (530) towards the outside of the power box (110), and the second ventilation structure (1164) and the wind blocking piece (1166) form a fourth air duct (540); the first air duct (510), the second air duct (520), the third air duct (530) and the fourth air duct (540) are communicated.

9. The energy storage device of claim 8, wherein, The battery box (210) comprises a second heat dissipation surface (216), the second heat dissipation surface (216) is a back side wall of the battery box (210), and an outside of the second heat dissipation surface (216) forms a fifth air duct (550), and the fifth air duct (550) is communicated with the first air duct (510), the second air duct (520), the third air duct (530) and the fourth air duct (540).

10. The energy storage device of claim 9, wherein, The energy storage device further comprises a shell (30) opening towards the back wall side of the energy storage device, the shell (30) forming a second cavity, the second cavity being provided with the battery module (20) and the power module (10) therein; The shell (30) is provided with a first air inlet (312) and a first air outlet (314), the first air inlet (312) being arranged on the shell bottom surface of the bottom of the shell (30), the first air inlet (312) being arranged on the edge of the shell bottom surface, close to the back of the battery box (210), forming a sixth air duct (560) flowing to the battery box (210); the first air outlet (314) is arranged on the shell top surface of the top of the shell (30), the first air outlet (314) is arranged on the edge of the shell top surface, close to the back of the power box (110), forming a seventh air duct (570) flowing out of the power box (110); the first air duct (510), the second air duct (520), the third air duct (530), the fourth air duct (540), the fifth air duct (550), the sixth air duct (560) and the seventh air duct (570) are communicated.

11. The energy storage device of claim 1, wherein, The energy storage device is provided with a mounting member (40), the mounting member (40) being arranged on the battery box (210), the battery module (220) comprising an end plate, the end plate being arranged on the top surface and the bottom surface of the battery module (220); the mounting member (40) is penetrated through the battery box (210) by a connecting member to be fixedly connected with the end plate of the battery module (220).

12. The energy storage device of claim 10, wherein, The shell (30) further comprises a first discharge port (316), the first discharge port (316) being located in the center of the shell bottom surface, the first discharge port (316) being arranged on the shell bottom surface and penetrating through the shell bottom surface along the thickness direction of the shell bottom surface; the battery box (210) comprises a second discharge port in the center of the bottom, the first discharge port (316) being communicated with the second discharge port.

13. The energy storage device of claim 10, wherein, The shell (30) further comprises at least one support seat (318), the support seat (318) being arranged outside the shell bottom surface.

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