Energy storage device, energy storage system, power utilization device and charging network

Abstract

The utility model belongs to the technical field of energy storage, and provides an energy storage device, an energy storage system, a power utilization device and a charging network, the energy storage device comprises a box body, the box body comprises two side plates, each side plate comprises a first plate section, a second plate section and a third plate section which are arranged in sequence, the first plate section and the third plate section are both vertically connected to the second plate section, and the first plate section and the second plate section are arranged in parallel. The first plate section and the second plate section are oppositely arranged, and the first plate section and the third plate section of one side plate are connected with the first plate section and the third plate section of the other side plate so that a closed structure can be defined. According to the energy storage device, the box body can be defined by the two side plates, so that the limitation degree of the size of the side plates is smaller, the box body is more convenient to manufacture, and the manufacturing cost is relatively lower.

Description

Technical Field

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

[0002] In related technical fields, energy storage device enclosures are mostly manufactured using a one-piece molding process, resulting in a relatively small number of components. However, for some large enclosures, the one-piece molding process is relatively difficult to implement and is more costly. Utility Model Content

[0003] The purpose of this application is to provide an energy storage device, an energy storage system, and a charging network, aiming to solve the technical problem of relatively high manufacturing costs of existing energy storage device enclosures.

[0004] In a first aspect, this application provides an energy storage device, including a housing, the housing including two side plates, each side plate including a first plate segment, a second plate segment and a third plate segment arranged sequentially, the first plate segment and the third plate segment being perpendicularly connected to the second plate segment, and the first plate segment and the third plate segment being arranged opposite to each other, wherein the first plate segment and the third plate segment of one side plate are connected to the first plate segment and the third plate segment of the other side plate to form a closed structure.

[0005] The beneficial effects of this utility model are as follows: The energy storage device provided by this utility model has a housing formed by connecting two stamped parts, namely, two side plates. Specifically, the first sections of the two side plates are connected, and the second sections of the two side plates are connected, or the first and third sections of the two side plates are connected, thus forming a closed structure. The energy storage device of this application has a housing formed by connecting two side plates, therefore, the size of the side plates is less restricted, the housing is easier to manufacture, and the manufacturing cost is relatively lower.

[0006] In some embodiments, the first plate segment includes a first vertical portion and two first horizontal portions connected to opposite ends of the first vertical portion;

[0007] The second plate segment includes a second vertical portion and two second horizontal portions connected to opposite ends of the second vertical portion;

[0008] The third plate segment includes a third vertical section and two third horizontal sections connected to opposite ends of the third vertical section;

[0009] The first vertical portion, the second vertical portion, and the third vertical portion are connected in sequence, a first gap is formed between the first horizontal portion and the second horizontal portion, and a second gap is formed between the second horizontal portion and the third horizontal portion.

[0010] By adopting the above technical solution, a first gap is formed between the first horizontal part and the second horizontal part of the side plate to reduce stress concentration at the connection between the first plate segment and the second plate segment, and a second gap is formed between the second horizontal part and the third horizontal part of the side plate to reduce stress concentration at the connection between the second plate segment and the third plate segment.

[0011] In some embodiments, when two side plates are connected, adjacent first vertical portions are welded together, adjacent first horizontal portions are welded together, and adjacent third vertical portions are welded together, and adjacent third horizontal portions are welded together; or...

[0012] The adjacent first vertical portion and the third vertical portion are welded together, and the adjacent first horizontal portion and the third horizontal portion are welded together.

[0013] By adopting the above technical solution and using welding process, the first vertical parts of the two side plates are connected together, and the first horizontal parts of the two side plates are connected together. At the same time, the third vertical parts of the two side plates are connected together, and the third horizontal parts of the two side plates are connected together; or, the first vertical parts and the third vertical parts of the two side plates are connected together, or the first horizontal parts and the third horizontal parts of the two side plates are connected together.

[0014] In some embodiments, the weld seams of two adjacent first vertical portions and the weld seams of two adjacent third vertical portions are coated with a first sealant; or...

[0015] The weld seams of the adjacent first vertical section and the third vertical section are coated with a first sealant.

[0016] By adopting the above technical solution, the sealing performance at the side plate connection can be further improved by using the first sealing element.

[0017] In some embodiments, at least a portion of the first seal coincides with the weld seam of two adjacent first horizontal portions; and at least a portion of the first seal coincides with the weld seam of two adjacent third horizontal portions; or,

[0018] At least a portion of the first seal coincides with the weld seam of the adjacent first horizontal portion and the third horizontal portion.

[0019] By adopting the above technical solution, the weld seams of the first seal and the two first horizontal portions are at least partially overlapped, and the weld seams of the first seal and the two third horizontal portions are at least partially overlapped, or the weld seams of the first seal and the first and third horizontal portions are at least partially overlapped, so as to further improve the sealing performance of the connection between the two side plates.

[0020] In some embodiments, the housing further includes a first corner connector, which is disposed at the first notch, and the opposite ends of the first corner connector are respectively connected to the first vertical part and the first horizontal part and the second vertical part and the second horizontal part.

[0021] By adopting the above technical solution, the structural strength of the first notch of the side plate and the overall sealing performance of the side plate are improved by using the first corner connector.

[0022] In some embodiments, the first corner connector includes a first support portion, and a first connecting portion and a second connecting portion disposed at opposite ends of the first support portion. The first connecting portion is welded to the first vertical portion and the first horizontal portion, and the second connecting portion is welded to the second vertical portion and the second horizontal portion.

[0023] By adopting the above technical solution, when the first connecting part is welded to the first vertical part and the first horizontal part, and when the second connecting part is welded to the second vertical part and the second horizontal part, the first supporting part is sealed at the first notch, thereby improving the structural strength at the first notch of the side plate and the overall sealing performance of the side plate.

[0024] In some embodiments, the first support portion includes a first horizontal support plate and a first vertical support plate perpendicular to the first horizontal support plate. The first horizontal support plate is flush with the first horizontal portion and the second horizontal portion. A first weld is provided between one end of the first horizontal support plate and the first horizontal portion, and a second weld is provided between the other end of the first horizontal support plate and the second horizontal portion. The first vertical support plate is parallel to the first vertical portion and the second vertical portion.

[0025] By adopting the above technical solution, the first gap is sealed by the first supporting horizontal plate, that is, the first supporting horizontal plate connects the first horizontal part and the second horizontal part to meet the sealing requirements of the later cover.

[0026] In some embodiments, the first connecting portion includes a first connecting horizontal plate connected to the first supporting horizontal plate and a first connecting vertical plate connected to the first supporting vertical plate. The first connecting horizontal plate is stacked on top of the first horizontal portion, and the first connecting vertical plate is parallel to the first vertical portion.

[0027] The second connecting portion includes a second connecting horizontal plate connected to the first supporting horizontal plate and a second connecting vertical plate connected to the first supporting vertical plate. The second connecting horizontal plate is stacked on top of the second horizontal portion, and the second connecting vertical plate is parallel to the second vertical portion.

[0028] By adopting the above technical solution, the first connecting horizontal plate and the first horizontal part are stacked to form a welding position, and the first connecting vertical plate is parallel to the first vertical part to form a welding position. Similarly, the second connecting horizontal plate and the second horizontal part form a welding position, and the second connecting vertical plate is parallel to the second vertical part to form a welding position, so as to improve the connection reliability between the first corner connector and the side plate.

[0029] In some embodiments, a second sealing element is provided at the gap between the first connecting horizontal plate and the first horizontal portion, the gap between the first connecting vertical plate and the first vertical portion, the gap between the first supporting vertical plate and the first vertical portion and the second vertical portion, the gap between the second connecting vertical plate and the second vertical portion, and the gap between the second connecting horizontal plate and the second horizontal portion.

[0030] By adopting the above technical solution, the second sealing element is used to seal each gap, thereby further improving the sealing performance of the two side plates.

[0031] In some embodiments, the housing further includes a second corner connector, which is disposed at the second notch, and the opposite ends of the second corner connector are respectively connected to the second vertical portion and the second horizontal portion and the third vertical portion and the third horizontal portion.

[0032] By adopting the above technical solution, the structural strength of the second notch of the side plate and the overall sealing performance of the side plate are improved by using the second corner connector.

[0033] In some embodiments, the second corner connector includes a second support portion, and a third connecting portion and a fourth connecting portion disposed at opposite ends of the second support portion. The third connecting portion is welded to the second vertical portion and the second horizontal portion, and the fourth connecting portion is welded to the third vertical portion and the third horizontal portion.

[0034] By adopting the above technical solution, when the third connecting part is welded to the second vertical part and the second horizontal part, and when the fourth connecting part is welded to the third vertical part and the third horizontal part, the second supporting part is sealed at the second notch, thereby improving the structural strength at the second notch of the side plate and the overall sealing performance of the side plate.

[0035] In some embodiments, the second support portion includes a second support horizontal plate and a second support vertical plate perpendicular to the second support horizontal plate. The second support horizontal plate is flush with the second horizontal portion and the third horizontal portion. A third weld is provided between one end of the second support horizontal plate and the second horizontal portion, and a fourth weld is provided between the other end of the second support horizontal plate and the third horizontal portion. The second support vertical plate is parallel to the second vertical portion and the third vertical portion.

[0036] By adopting the above technical solution, the second support horizontal plate is used to seal the second gap, that is, the second support horizontal plate connects the second horizontal part and the third horizontal part to meet the sealing requirements of the later cover.

[0037] In some embodiments, the third connecting portion includes a third connecting horizontal plate connected to the second supporting horizontal plate and a third connecting vertical plate connected to the second supporting vertical plate. The third connecting horizontal plate is stacked on top of the second horizontal portion, and the third connecting vertical plate is parallel to the second vertical portion.

[0038] The fourth connecting part includes a fourth connecting horizontal plate connected to the second supporting horizontal plate and a fourth connecting vertical plate connected to the second supporting vertical plate. The fourth connecting horizontal plate is stacked on top of the third horizontal part, and the fourth connecting vertical plate is arranged parallel to the third vertical part.

[0039] By adopting the above technical solution, the third connecting horizontal plate and the second horizontal part are stacked to form a welding position, and the third connecting vertical plate is parallel to the second vertical part to form a welding position. Similarly, the fourth connecting horizontal plate and the third horizontal part form a welding position, and the fourth connecting vertical plate and the third vertical part form a welding position, so as to improve the connection reliability between the second corner connector and the side plate.

[0040] In some embodiments, a third sealing element is provided at the gap between the third connecting horizontal plate and the second horizontal portion, the gap between the third connecting vertical plate and the second vertical portion, the gap between the second supporting vertical plate and the second vertical portion and the third vertical portion, the gap between the fourth connecting vertical plate and the third vertical portion, and the gap between the fourth connecting horizontal plate and the third horizontal portion.

[0041] By adopting the above technical solution, the third sealing element is used to seal each gap, thereby further improving the sealing performance of the two side plates.

[0042] In some embodiments, the housing further includes an upper cover plate, a lower cover plate disposed opposite to the upper cover plate, a first sealing ring, and a second sealing ring. The upper cover plate covers the same end of the two side plates, the lower cover plate covers the other end of the two side plates, the first sealing ring is disposed between the upper cover plate and the ends of the two side plates, and the second sealing ring is disposed between the lower cover plate and the ends of the two side plates.

[0043] By adopting the above technical solution, the upper cover plate and the lower cover plate, together with the two side plates, form an accommodating space for the battery cell, and the sealing performance of the enclosure is further improved by using the first sealing ring and the second sealing ring.

[0044] Secondly, this application provides an energy storage system, including the energy storage device described above.

[0045] Thirdly, this application provides an electrical device, including an energy storage device or an energy storage system as described above.

[0046] Fourthly, this application provides a charging network, including a charging pile and the aforementioned energy storage device or energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0047] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art 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.

[0049] Figure 1 An exploded view of the housing of the energy storage device provided in the embodiments of this application;

[0050] Figure 2 Another exploded view of the housing of the energy storage device provided in the embodiments of this application;

[0051] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0052] Figure 4 A partial view of the housing of the energy storage device provided in Embodiment 1 of this application;

[0053] Figure 5 A partial view of the first corner connector of the energy storage device provided in Embodiment 1 of this application when the first notch is not welded;

[0054] Figure 6 A partial view of the first corner connector of the energy storage device provided in Embodiment 1 of this application after welding at the first notch;

[0055] Figure 7 A partial view of the first corner connector of the energy storage device provided in Embodiment 1 of this application when the first notch is not sealed;

[0056] Figure 8 A partial view of the first corner connector of the energy storage device provided in Embodiment 1 of this application after sealing at the first notch;

[0057] Figure 9 This is a partial view of the housing of the energy storage device provided in Embodiment 2 of this application;

[0058] Figure 10 A partial view of the second corner connector of the energy storage device housing provided in Embodiment 2 of this application when the second notch is not welded;

[0059] Figure 11 A partial view of the second corner connector of the energy storage device housing provided in Embodiment 2 of this application after welding at the second notch;

[0060] Figure 12 A partial view of the second corner connector of the energy storage device housing provided in Embodiment 2 of this application when the second notch is not sealed;

[0061] Figure 13 A partial view of the second corner connector of the energy storage device provided in Embodiment 2 of this application after sealing at the second notch.

[0062] Explanation of reference numerals in the attached figures:

[0063] 1000. Energy storage devices;

[0064] 100. Box body;

[0065] 10. Side panel; 11. First panel segment; 111. First vertical section; 112. First horizontal section; 12. Second panel segment; 121. Second vertical section; 122. Second horizontal section; 13. Third panel segment; 131. Third vertical section; 132. Third horizontal section; 10a. First notch; 10b. Second notch;

[0066] 20. First corner connector; 21. First support part; 211. First support horizontal plate; 212. First support vertical plate; 22. First connecting part; 221. First connecting horizontal plate; 222. First connecting vertical plate; 23. Second connecting part; 231. Second connecting horizontal plate; 232. Second connecting vertical plate; 21a. First weld; 21b. Second weld;

[0067] 30. Second corner connector; 31. Second support part; 311. Second support horizontal plate; 312. Second support vertical plate; 32. Third connecting part; 321. Third connecting horizontal plate; 322. Third connecting vertical plate; 33. Fourth connecting part; 331. Fourth connecting horizontal plate; 332. Fourth connecting vertical plate; 31a. Third weld; 31b. Fourth weld;

[0068] 41. First seal; 42. Second seal; 43. Third seal;

[0069] 51. Upper cover plate; 52. Lower cover plate; 61. First sealing ring; 62. Second sealing ring. Detailed Implementation

[0070] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0071] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0072] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0073] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0074] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0075] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0076] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0077] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0078] In related technical fields, the housing of energy storage devices is mostly made by one-piece molding process. When dealing with large housings, the manufacturing is difficult and the cost is relatively high.

[0079] In view of this, the energy storage device provided in this application has a housing formed by two side panels. Specifically, each side panel is bent twice to form a first segment, a second segment, and a third segment. When connecting, the first segments of the two side panels can be connected together, and the third segments of the two side panels can be connected together, or the first and third segments of the two side panels can be connected together. Because the energy storage device of this application can have its housing formed by two side panels, the size of the side panels is less restricted, the housing is easier to manufacture, and the manufacturing cost is relatively lower.

[0080] Energy storage devices may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When an energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0081] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0082] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0083] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0084] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0085] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0086] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0087] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0088] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0089] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0090] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0091] In some embodiments, the energy storage system may include one or more energy storage devices and a power converter system (PCS), the power converter being connected between the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power converter. As examples, the power generation device may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of power generation device is not limited in this application.

[0092] According to some embodiments of this application, and referring to the figures, this application also provides an electrical device, which includes the energy storage device or the energy storage system in the above embodiments.

[0093] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0094] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0095] For example, a charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to the battery units in the energy storage devices via cables, allowing the battery units to supply their stored energy to the charging stations. Each charging station has one or more connectors for connecting to electrical devices (such as vehicles), enabling the charging of these devices.

[0096] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0097] Please refer to Figure 1 and Figure 2 This application provides an energy storage device 1000, including a housing 100. The housing 100 includes two side plates 10, each side plate 10 including a first plate segment 11, a second plate segment 12, and a third plate segment 13 arranged sequentially. The first plate segment 11 and the third plate segment 13 are both vertically connected to the second plate segment 12, and the first plate segment 11 and the third plate segment 13 are arranged opposite to each other. The first plate segment 11 and the third plate segment 13 of one side plate 10 are connected to the first plate segment 11 and the third plate segment 13 of the other side plate 10 to form a closed structure.

[0098] Understandably, the side plate 10 is a structural component located on the periphery of the housing 100. The housing 100 of this application is divided into two side plates 10 on its periphery. These two side plates 10 are stamped parts and are formed into U-shaped structural components after being bent twice. The structural dimensions of the side plates 10 after bending can be the same or different. For example, the side plate 10 can be bent into three segments, namely, the first segment 11, the second segment 12, and the third segment 13. Since the second segment 12 is in the middle position, the dimensions of the second segment 12 of the two side plates 10 should be the same, that is, the height and length of the second segment 12 should be the same. Similarly, the height of the first segment 11 and the height of the third segment 13 should also be the same. Finally, when the structural dimensions of the two side plates 10 are the same, the length of the first segment 11 and the length of the third segment 13 are the same. And when the structural dimensions of the two side plates 10 are different, the length of the first segment 11 and the length of the third segment 13 are different.

[0099] Furthermore, during the actual connection process, the first segment 11 of one side plate 10 can be connected to the first segment 11 of another side plate 10, while the third segment 13 of the current side plate 10 is connected to the third segment 13 of the other side plate 10. Alternatively, the first segment 11 of one side plate 10 can be connected to the third segment 13 of another side plate 10; similarly, the third segment 13 of the current side plate 10 can be connected to the first segment 11 of another side plate 10.

[0100] Here, the connection methods that can be used for the plates that need to be connected include, but are not limited to, welding, riveting, and threaded connection.

[0101] Optionally, when two side plates 10 are connected, if the length of the first segment 11 of one side plate 10 is greater than the length of its third segment 13, then the length of the third segment 13 of the other side plate 10 should also be greater than the length of its first segment 11. Furthermore, the length of the first segment 11 of the current side plate 10 is equal to the length of the third segment 13 of the other side plate 10, and the length of the third segment 13 of the current side plate 10 is equal to the length of the first segment 11 of the other side plate 10. Thus, the first segment 11 of the current side plate 10 and the third segment 13 of the other side plate 10 are connected by welding. Similarly, the third segment 13 of the current side plate 10 and the first segment 11 of the other side plate 10 are connected by welding. Thus, the second plate segments 12 of each of the two side panels 10 correspond to each other, and the first plate segments 11 and the third plate segments 13 at the connection of the two side panels 10 correspond to each other. That is, the two second plate segments 12 form two oppositely arranged peripheral parts of the box 100, and the two first plate segments 11 and the third plate segments 13 form two other opposite peripheral parts of the box 100.

[0102] The energy storage device 1000 provided by this utility model has a housing 100 formed by connecting two stamped parts, namely, two side plates 10. Specifically, the first plate segments 11 of the two side plates 10 are connected, and the second plate segments 12 of the two side plates 10 are connected, or the first plate segments 11 and the third plate segments 13 of the two side plates 10 are connected, thus forming a closed structure. The energy storage device 1000 of this application has a housing 100 formed by connecting two side plates 10, therefore, the size of the side plates 10 is less restricted, the housing 100 is easier to manufacture, and the manufacturing cost is relatively lower.

[0103] Please refer to Figure 2 , Figure 4 and Figure 9 In some embodiments, the first plate segment 11 includes a first vertical portion 111 and two first horizontal portions 112 connected to opposite ends of the first vertical portion 111; the second plate segment 12 includes a second vertical portion 121 and two second horizontal portions 122 connected to opposite ends of the second vertical portion 121; the third plate segment 13 includes a third vertical portion 131 and two third horizontal portions 132 connected to opposite ends of the third vertical portion 131; wherein the first vertical portion 111, the second vertical portion 121 and the third vertical portion 131 are connected in sequence, a first gap 10a is formed between the first horizontal portion 112 and the second horizontal portion 122, and a second gap 10b is formed between the second horizontal portion 122 and the third horizontal portion 132.

[0104] Understandably, in order to cover the entire box 100 and form a sealed storage space, each panel segment in the height direction of the box 100 includes a vertical part and horizontal parts located at opposite ends of the vertical part. Here, the horizontal parts are arranged perpendicular to the vertical parts, that is, the horizontal parts are arranged perpendicular to the height direction of the box 100 and bend outward. Here, each horizontal part is used to support the cover plate covering the end of the side panel 10.

[0105] The vertical portions of the side plate 10 are connected to each other, while gaps are formed between adjacent horizontal portions. Since the stress at the bending point of the side plate 10 is too high, especially at the connection point of two adjacent horizontal portions, a first gap 10a is formed at the bending point of the side plate 10 between the first horizontal portion 112 and the second horizontal portion 122. That is, in the same side plate 10, the first horizontal portion 112 and the second horizontal portion 122 are disconnected. Similarly, a second gap 10b is formed at the bending point of the side plate 10 between the second horizontal portion 122 and the third horizontal portion 132 to perform the disconnection process.

[0106] Furthermore, in order to improve the overall airtightness of the enclosure 100, each horizontal part of each side panel 10 should be at the same horizontal height so as to keep the relative ends of the side panels 10 at the same height in the height direction of the enclosure 100.

[0107] Thus, a first notch 10a is formed between the first horizontal portion 112 and the second horizontal portion 122 of the side plate 10 to reduce stress concentration at the connection between the first plate segment 11 and the second plate segment 12, and a second notch 10b is formed between the second horizontal portion 122 and the third horizontal portion 132 of the side plate 10 to reduce stress concentration at the connection between the second plate segment 12 and the third plate segment 13.

[0108] Please refer to Figure 2 , Figure 4 and Figure 9 In some embodiments, when the two side plates 10 are connected, two adjacent first vertical portions 111 are welded together, two adjacent first horizontal portions 112 are welded together, and two adjacent third vertical portions 131 are welded together and two adjacent third horizontal portions 132 are welded together; or, adjacent first vertical portions 111 and third vertical portions 131 are welded together, and adjacent first horizontal portions 112 and third horizontal portions 132 are welded together.

[0109] Understandably, since the plate segments of the two side plates 10 can be selected when they are connected, for example, when the first plate segments 11 of each of the two side plates 10 are connected, and the third plate segments 13 of each of the two side plates 10 are connected, then the first vertical portion 111 of the first plate segment 11 of the current side plate 10 is connected to the first vertical portion 111 of the first plate segment 11 of the other side plate 10, and the first horizontal portion 112 of each of the two side plates 10 is also connected. At the same time, on the other side of the two side plates 10, the third vertical portion 131 of the third plate segment 13 of the current side plate 10 is connected to the third vertical portion 131 of the third plate segment 13 of the other side plate 10, and the third horizontal portion 132 of each of the two side plates 10 is also connected. For example, when the first segment 11 of one side plate 10 is connected to the third segment 13 of the other side plate 10, then the first vertical portion 111 of the first segment 11 of the current side plate 10 is connected to the third vertical portion 131 of the third segment 13 of the other side plate 10, and the first horizontal portion 112 of the first segment 11 of the current side plate 10 is connected to the third horizontal portion 132 of the third segment 13 of the other side plate 10.

[0110] Optionally, the vertical parts of the two side plates 10 can be spot welded together, and the horizontal parts of the two side plates 10 can be filled by welding at the connection point, and the welded area can be ground and polished to improve the flatness of the connection point between the two horizontal parts.

[0111] Thus, by using welding, the first vertical portions 111 of the two side plates 10 are connected together, and the first horizontal portions 112 of the two side plates 10 are connected together. At the same time, the third vertical portions 131 of the two side plates 10 are connected together, and the third horizontal portions 112 of the two side plates 10 are connected together; or, the first vertical portions 111 and the third vertical portions 131 of the two side plates 10 are connected together, or the first horizontal portions 112 and the third horizontal portions 132 of the two side plates 10 are connected together.

[0112] Please refer to Figure 2 and Figure 3 In some embodiments, the weld seams of two adjacent first vertical portions 111 and the weld seams of two adjacent third vertical portions 131 are coated with a first seal 41; or, the weld seams of adjacent first vertical portions 111 and third vertical portions 131 are coated with a first seal 41.

[0113] Understandably, the first seal 41 can be a sealing colloid that is initially fluid and has a certain degree of fluidity. It can gradually harden under normal temperature air conditions, thus providing a good sealing effect on the weld.

[0114] Optionally, a first sealant 41 is applied to the weld seams of two adjacent first vertical portions 111, and a first sealant 41 is applied to the weld seams of two adjacent third vertical portions 131.

[0115] Alternatively, the first sealant 41 may be applied to the weld seam between adjacent first vertical portions 111 and third vertical portions 131.

[0116] Thus, the sealing performance at the connection of the side plate 10 can be further improved by using the first seal 41.

[0117] Please refer to Figure 3 In some embodiments, at least a portion of the first seal 41 coincides with the weld seam of two adjacent first horizontal portions 112; and at least a portion of the first seal 41 coincides with the weld seam of two adjacent third horizontal portions 132; or, at least a portion of the first seal 41 coincides with the weld seam of adjacent first horizontal portions 112 and third horizontal portions 132.

[0118] Understandably, since the horizontal and vertical sections are arranged perpendicularly to each other, that is, the welds of the two horizontal sections and the two vertical sections are perpendicular to each other, gaps are prone to occur at the joint between the horizontal and vertical welds, ultimately affecting the overall sealing performance of the housing 100. Therefore, at least a portion of the first sealing element 41 is applied to the welds of the two horizontal sections to fill the gap at the joint of the two welds.

[0119] Optionally, when the first plate segments 11 of each of the two side plates 10 are connected, and the third plate segments 13 of each of the two side plates 10 are connected, then at least a portion of the first seal 41 coincides with the weld seam of the two adjacent first horizontal portions 112; and at least a portion of the first seal 41 coincides with the weld seam of the two adjacent third horizontal portions 132.

[0120] When one of the side plates 10 is connected to the first plate segment 11 and the third plate segment 13 of the other side plate 10, at least a portion of the first seal 41 coincides with the weld of the adjacent first horizontal portion 112 and third horizontal portion 132.

[0121] Thus, the weld seams of the first seal 41 and the two first horizontal portions 112 are at least partially overlapped, and the weld seams of the first seal 41 and the two third horizontal portions 132 are at least partially overlapped, or the weld seams of the first seal 41 and the first horizontal portions 112 and the third horizontal portions 132 are at least partially overlapped, so as to further improve the sealing performance at the connection of the two side plates 10.

[0122] Please refer to Figures 4 to 8In some embodiments, the housing 100 further includes a first corner connector 20, which is disposed at the first notch 10a. The opposite ends of the first corner connector 20 are respectively connected to the first vertical part 111 and the first horizontal part 112 and the second vertical part 121 and the second horizontal part 122.

[0123] Understandably, the function of the first corner connector 20 is to fill the first gap 10a, so as to improve the structural strength of the horizontal part of the side plate 10 when bent, and to improve the sealing performance of the horizontal part of the side plate 10 when connected with the cover plate.

[0124] Here, the first corner connector 20 should be a bent part to satisfy the two adjacent horizontal parts and the two adjacent vertical parts after bending.

[0125] In this way, the structural strength at the first notch 10a of the side plate 10 and the overall sealing performance of the side plate 10 are improved by using the first corner connector 20.

[0126] Of course, in other embodiments, the opposite ends of the first corner connector 20 can be connected to the first horizontal part 112 and the second horizontal part 122 respectively, so as to make the end face of the first corner connector 20 and the end faces of the two horizontal parts flush.

[0127] Please refer to Figures 4 to 8 In some embodiments, the first corner connector 20 includes a first support portion 21 and a first connecting portion 22 and a second connecting portion 23 disposed at opposite ends of the first support portion 21. The first connecting portion 22 is welded to the first vertical portion 111 and the first horizontal portion 112, and the second connecting portion 23 is welded to the second vertical portion 121 and the second horizontal portion 122.

[0128] Understandably, the first support portion 21 is used to block the first gap 10a, and it also needs to form a smooth transition with the adjacent horizontal and vertical portions. Therefore, the first support portion 21 is a bent part with a certain curvature. The first connecting portion 22 is used to weld and connect with the first vertical portion 111 and the first horizontal portion 112 of the first plate segment 11. The second connecting portion 23 is used to weld and connect with the second vertical and second horizontal portions 122 of the second plate segment 12.

[0129] Thus, when the first connecting part 22 is welded to the first vertical part 111 and the first horizontal part 112, and when the second connecting part 23 is welded to the second vertical part 121 and the second horizontal part 122, the first supporting part 21 is sealed at the first notch 10a, thereby improving the structural strength at the first notch 10a of the side plate 10 and the overall sealing performance of the side plate 10.

[0130] Please refer to Figures 4 to 8In some embodiments, the first support portion 21 includes a first support horizontal plate 211 and a first support vertical plate 212 perpendicular to the first support horizontal plate 211. The first support horizontal plate 211 is flush with the first horizontal portion 112 and the second horizontal portion 122. A first weld 21a is provided between one end of the first support horizontal plate 211 and the first horizontal portion 112, and a second weld 21b is provided between the other end of the first support horizontal plate 211 and the second horizontal portion 122. The first support vertical plate 212 is parallel to the first vertical portion 111 and the second vertical portion 121.

[0131] Understandably, the first horizontal support plate 211 is a horizontally arranged structural part in the first support portion 21, and the first horizontal support plate 211 realizes a smooth transition between the first horizontal portion 112 and the second horizontal portion 122; the first vertical support plate 212 is a vertically arranged structural part in the first support portion 21, and the first vertical support plate 212 surrounds and connects to the first vertical portion 111 and the second vertical portion 121.

[0132] Since there is a joint gap between one end of the first supporting horizontal plate 211 and the first horizontal part 112, filler welding can be performed at the joint gap to form a first weld 21a, and filler welding can be performed at the joint gap between the other end of the first supporting horizontal plate 211 and the second horizontal part 122 to form a second weld 21b.

[0133] The first supporting vertical plate 212 is connected to the first vertical part 111 and the second vertical part 121 by spot welding.

[0134] Thus, the first support horizontal plate 211 is used to seal the first gap 10a, that is, the first support horizontal plate 211 connects the first horizontal part 112 and the second horizontal part 122 to meet the sealing requirements of the later cover.

[0135] Please refer to Figures 4 to 8 In some embodiments, the first connecting portion 22 includes a first connecting horizontal plate 221 connected to the first supporting horizontal plate 211 and a first connecting vertical plate 222 connected to the first supporting vertical plate 212. The first connecting horizontal plate 221 is stacked on top of the first horizontal portion 112, and the first connecting vertical plate 222 is parallel to the first vertical portion 111.

[0136] The second connecting part 23 includes a second connecting horizontal plate 231 connected to the first supporting horizontal plate 211 and a second connecting vertical plate 232 connected to the first supporting vertical plate 212. The second connecting horizontal plate 231 is stacked on top of the second horizontal part 122, and the second connecting vertical plate 232 is parallel to the second vertical part 121.

[0137] Understandably, the first connecting horizontal plate 221 is positioned to extend below the first horizontal portion 112, thus stacking with the first horizontal portion 112. Optionally, the first connecting horizontal plate 221 and the first horizontal portion 112 can be connected by spot welding. Furthermore, the first connecting vertical plate 222 is located around the first vertical portion 111 and is arranged parallel to the first vertical portion 111. Optionally, the first connecting vertical plate 222 and the first vertical portion 111 can be connected by spot welding.

[0138] Similarly, the second connecting horizontal plate 231 is positioned to extend below the second horizontal portion 122, thereby stacking with the second horizontal portion 122. Optionally, the second connecting horizontal plate 231 and the second horizontal portion 122 can be connected by spot welding. Furthermore, the second connecting vertical plate 232 is located around the second vertical portion 121 and is arranged parallel to the second vertical portion 121. Optionally, the second connecting vertical plate 232 and the second vertical portion 121 can be connected by spot welding.

[0139] Thus, the first connecting horizontal plate 221 and the first horizontal portion 112 are stacked to form a welding position, and the first connecting vertical plate 222 is parallel to the first vertical portion 111 to form a welding position. Similarly, the second connecting horizontal plate 231 and the second horizontal portion 122 form a welding position, and the second connecting vertical plate 232 is parallel to the second vertical portion 121 to form a welding position, so as to improve the connection reliability between the first corner connector 20 and the side plate 10.

[0140] Please refer to Figure 8 In some embodiments, a second sealing element 42 is provided at the gap between the first connecting horizontal plate 221 and the first horizontal part 112, the gap between the first connecting vertical plate 222 and the first vertical part 111, the gap between the first supporting vertical plate 212 and the first vertical part 111 and the second vertical part 121, the gap between the second connecting vertical plate 232 and the second vertical part 121, and the gap between the second connecting horizontal plate 231 and the second horizontal part 122.

[0141] Understandably, the second seal 42 can be a sealing colloid that is initially fluid and has a certain degree of fluidity. It can gradually harden under normal temperature air conditions, thus providing a good sealing effect on the weld.

[0142] In this way, the second sealing element 42 is used to seal each gap, thereby further improving the sealing performance of the two side plates 10.

[0143] Please refer to Figures 9 to 13In some embodiments, the housing 100 further includes a second corner connector 30, which is disposed at the second notch 10b. The two opposite ends of the second corner connector 30 are respectively connected to the second vertical part 121, the second horizontal part 122, the third vertical part 131, and the third horizontal part 132.

[0144] Understandably, the function of the second corner connector 30 is to fill the second gap 10b, thereby improving the structural strength of the horizontal portion of the side plate 10 during bending, and improving the sealing performance of the horizontal portion of the side plate 10 when connected to the cover plate.

[0145] Here, the second corner connector 30 should be a bent part to satisfy the two adjacent horizontal parts and the two adjacent vertical parts after bending.

[0146] In this way, the structural strength at the second notch 10b of the side plate 10 and the overall sealing performance of the side plate 10 are improved by using the second corner connector 30.

[0147] Please refer to Figures 9 to 13 In some embodiments, the second corner connector 30 includes a second support portion 31, and a third connecting portion 32 and a fourth connecting portion 33 disposed at opposite ends of the second support portion 31. The third connecting portion 32 is welded to the second vertical portion 121 and the second horizontal portion 122, and the fourth connecting portion 33 is welded to the third vertical portion 131 and the third horizontal portion 132.

[0148] Understandably, the second support portion 31 is used to block the second notch 10b, and it also needs to form a smooth transition with the adjacent horizontal and vertical portions. Therefore, the second support portion 31 is a bent part with a certain curvature. The third connecting portion 32 is used to weld and connect with the second vertical portion 121 and the second horizontal portion 122 of the second plate segment 12. The fourth connecting portion 33 is used to weld and connect with the third vertical and third horizontal portions 132 of the third plate segment 13.

[0149] Thus, when the third connecting part 32 is welded to the second vertical part 121 and the second horizontal part 122, and when the fourth connecting part 33 is welded to the third vertical part 131 and the third horizontal part 132, the second supporting part 31 is sealed at the second notch 10b, thereby improving the structural strength at the second notch 10b of the side plate 10 and the overall sealing performance of the side plate 10.

[0150] Please refer to Figures 9 to 13In some embodiments, the second support portion 31 includes a second support horizontal plate 311 and a second support vertical plate 312 perpendicular to the second support horizontal plate 311. The second support horizontal plate 311 is flush with the second horizontal portion 122 and the third horizontal portion 132. A third weld is provided between one end of the second support horizontal plate 311 and the second horizontal portion 122, and a fourth weld is provided between the other end of the second support horizontal plate 311 and the third horizontal portion 132. The second support vertical plate 312 is parallel to the second vertical portion 121 and the third vertical portion 131.

[0151] Understandably, the second support horizontal plate 311 is a horizontally arranged structural part in the second support portion 31, and the second support horizontal plate 311 realizes a smooth transition between the second horizontal portion 122 and the third horizontal portion 132; the second support vertical plate 312 is a vertically arranged structural part in the second support portion 31, and the second support vertical plate 312 surrounds and connects to the second vertical portion 121 and the third vertical portion 131.

[0152] Since there is a gap between one end of the second support horizontal plate 311 and the second horizontal part 122, filler welding can be performed at the gap to form a third weld 31a, and filler welding can be performed at the gap between the other end of the second support horizontal plate 311 and the third horizontal part 132 to form a fourth weld 31b.

[0153] The second supporting vertical plate 312 is connected to the second vertical part 121 and the third vertical part 131 by spot welding.

[0154] Thus, the second support horizontal plate 311 is used to seal the second gap 10b, that is, the second support horizontal plate 311 connects the second horizontal part 122 and the third horizontal part 132 to meet the sealing requirements of the later cover.

[0155] Please refer to Figures 9 to 13 In some embodiments, the third connecting portion 32 includes a third connecting horizontal plate 321 connected to the second supporting horizontal plate 311 and a third connecting vertical plate 322 connected to the second supporting vertical plate 312. The third connecting horizontal plate 321 is stacked on top of the second horizontal portion 122, and the third connecting vertical plate 322 is parallel to the second vertical portion 121.

[0156] The fourth connecting part 33 includes a fourth connecting horizontal plate 331 connected to the second supporting horizontal plate 311 and a fourth connecting vertical plate 332 connected to the second supporting vertical plate 312. The fourth connecting horizontal plate 331 is stacked on top of the third horizontal part 132, and the fourth connecting vertical plate 332 is parallel to the third vertical part 131.

[0157] Understandably, the third connecting horizontal plate 321 is positioned to extend below the second horizontal portion 122, thus stacking on top of the second horizontal portion 122. Optionally, the third connecting horizontal plate 321 and the second horizontal portion 122 can be connected by spot welding. Furthermore, the third connecting vertical plate 322 is located around the second vertical portion 121 and is arranged parallel to it. Optionally, the third connecting vertical plate 322 and the second vertical portion 121 can be connected by spot welding.

[0158] Similarly, the fourth connecting horizontal plate 331 is positioned to extend below the third horizontal portion 132, thus stacking with the third horizontal portion 132. Optionally, the fourth connecting horizontal plate 331 and the third horizontal portion 132 can be connected by spot welding. Furthermore, the fourth connecting vertical plate 332 is located on the periphery of the third vertical portion 131 and is arranged parallel to the third vertical portion 131. Optionally, the fourth connecting vertical plate 332 and the third vertical portion 131 can be connected by spot welding.

[0159] Thus, the third connecting horizontal plate 321 and the second horizontal portion 122 are stacked to form a welding position, and the third connecting vertical plate 322 is parallel to the second vertical portion 121 to form a welding position. Similarly, the fourth connecting horizontal plate 331 and the third horizontal portion 132 form a welding position, and the fourth connecting vertical plate 332 and the third vertical portion 131 form a welding position, so as to improve the connection reliability between the second corner connector 30 and the side plate 10.

[0160] Please refer to Figure 13 In some embodiments, a third sealing element 43 is provided at the gap between the third connecting horizontal plate 321 and the second horizontal part 122, the gap between the third connecting vertical plate 322 and the second vertical part 121, the gap between the second supporting vertical plate 312 and the second vertical part 121 and the third vertical part 131, the gap between the fourth connecting vertical plate 332 and the third vertical part 131, and the gap between the fourth connecting horizontal plate 331 and the third horizontal part 132.

[0161] Understandably, the third seal 43 can be a sealing colloid that is initially fluid and has a certain degree of fluidity. It can gradually harden under normal temperature air conditions, thus providing a good sealing effect on the weld.

[0162] In this way, the third sealing element 43 is used to seal each gap, thereby further improving the sealing performance of the two side plates 10.

[0163] Please refer to Figures 1 to 13In some embodiments, the housing 100 further includes an upper cover plate 51, a lower cover plate 52 disposed opposite to the upper cover plate 51, a first sealing ring 61, and a second sealing ring 62. The upper cover plate 51 covers the same end of the two side plates 10, and the lower cover plate 52 covers the other end of the two side plates 10. The first sealing ring 61 is disposed between the upper cover plate 51 and the ends of the two side plates 10, and the second sealing ring 62 is disposed between the lower cover plate 52 and the ends of the two side plates 10.

[0164] Understandably, the upper cover 51 covers the top of the two side plates 10, and the lower cover 52 covers the bottom of the two side plates 10. That is, the upper cover 51, the two side plates 10 and the lower cover 52 enclose a space for accommodating the battery cell.

[0165] Meanwhile, the first sealing ring 61 is disposed between the horizontal portion of each side plate 10 and the upper cover plate 51, and the second sealing ring 62 is disposed between the horizontal portion of each side plate 10 and the lower cover plate 52.

[0166] Thus, the upper cover plate 51 and the lower cover plate 52, together with the two side plates 10, form an accommodating space for the battery cell, and the sealing performance of the housing 100 is further improved by the first sealing ring 61 and the second sealing ring 62.

[0167] Alternatively, in other embodiments, the lower cover plate 52 can be replaced by a heat exchange plate, that is, the heat exchange plate is directly placed on the lower end of the two side plates 10. In this way, the encapsulation requirements can be met, and the battery cells in the accommodating space can be heat exchanged.

[0168] Please refer to the figure. In a specific embodiment, the energy storage device 1000 includes a housing 100, which includes two side plates 10, a first corner connector 20, a second corner connector 30, an upper cover plate 51, a lower cover plate 52, a first sealing ring 61, and a second sealing ring 62.

[0169] The side panel 10 includes a first panel segment 11, a second panel segment 12, and a third panel segment 13 arranged sequentially. The first panel segment 11 and the second panel segment 12 are both vertically connected to the second panel segment 12. The first panel segment 11 and the second panel segment 12 are arranged opposite to each other. The first panel segment 11 and the third panel segment 13 of one side panel 10 are connected to the first panel segment 11 and the third panel segment 13 of the other side panel 10 to form a closed structure.

[0170] The first plate segment 11 includes a first vertical portion 111 and two first horizontal portions 112 connected to opposite ends of the first vertical portion 111; the second plate segment 12 includes a second vertical portion 121 and two second horizontal portions 122 connected to opposite ends of the second vertical portion 121; the third plate segment 13 includes a third vertical portion 131 and two third horizontal portions 132 connected to opposite ends of the third vertical portion 131; wherein the first vertical portion 111, the second vertical portion 121 and the third vertical portion 131 are connected in sequence, a first gap 10a is formed between the first horizontal portion 112 and the second horizontal portion 122, and a second gap 10b is formed between the second horizontal portion 122 and the third horizontal portion 132.

[0171] The adjacent first vertical portion 111 and the third vertical portion 131 are welded together, and the adjacent first horizontal portion 112 and the third horizontal portion 132 are welded together. A first sealant 41 is applied to the weld joint of the adjacent first vertical portion 111 and the third vertical portion 131. At least a portion of the first sealant 41 coincides with the weld joint of the adjacent first horizontal portion 112 and the third horizontal portion 132.

[0172] The first corner connector is located at the first notch 10a. The opposite ends of the first corner connector 20 are respectively connected to the first vertical part 111 and the first horizontal part 112 and the second vertical part 121 and the second horizontal part 122. The first corner connector 20 includes a first support part 21, and a first connecting part 22 and a second connecting part 23 located at opposite ends of the first support part 21. The first connecting part 22 is welded to the first vertical part 111 and the first horizontal part 112, and the second connecting part 23 is welded to the second vertical part 121 and the second horizontal part 122. The first support portion 21 includes a first support horizontal plate 211 and a first support vertical plate 212 perpendicular to the first support horizontal plate 211. The first support horizontal plate 211 is flush with the first horizontal portion 112 and the second horizontal portion 122. A first weld 21a is provided between one end of the first support horizontal plate 211 and the first horizontal portion 112, and a second weld 21b is provided between the other end of the first support horizontal plate 211 and the second horizontal portion 122. The first support vertical plate 212 is parallel to the first vertical portion 111 and the second vertical portion 121. The first connecting portion 22 includes a first connecting horizontal plate 221 connected to the first supporting horizontal plate 211 and a first connecting vertical plate 222 connected to the first supporting vertical plate 212. The first connecting horizontal plate 221 is stacked on top of the first horizontal portion 112, and the first connecting vertical plate 222 is parallel to the first vertical portion 111. The second connecting portion 23 includes a second connecting horizontal plate 231 connected to the first supporting horizontal plate 211 and a second connecting vertical plate 232 connected to the first supporting vertical plate 212. The second connecting horizontal plate 231 is stacked on top of the second horizontal portion 122, and the second connecting vertical plate 232 is parallel to the second vertical portion 121.

[0173] A second sealing element 42 is provided at the gap between the first connecting horizontal plate 221 and the first horizontal part 112, the gap between the first connecting vertical plate 222 and the first vertical part 111, the gap between the first supporting vertical plate and the first vertical part 111 and the second vertical part 121, the gap between the second connecting vertical plate 232 and the second vertical part 121, and the gap between the second connecting horizontal plate 231 and the second horizontal part 122.

[0174] The second corner connector is located at the second notch 10b. The two opposite ends of the second corner connector 30 are respectively connected to the second vertical part 121, the second horizontal part 122, the third vertical part 131, and the third horizontal part 132. The second corner connector 30 includes a second support part 31, and a third connecting part 32 and a fourth connecting part 33 located at opposite ends of the second support part 31. The third connecting part 32 is welded to the second vertical part 121 and the second horizontal part 122, and the fourth connecting part 33 is welded to the third vertical part 131 and the third horizontal part 132. The second support portion 31 includes a second support horizontal plate 311 and a second support vertical plate 312 perpendicular to the second support horizontal plate 311. The second support horizontal plate 311 is flush with the second horizontal portion 122 and the third horizontal portion 132. A third weld 31a is provided between one end of the second support horizontal plate 311 and the second horizontal portion 122, and a fourth weld 31b is provided between the other end of the second support horizontal plate 311 and the third horizontal portion 132. The second support vertical plate 312 is parallel to the second vertical portion 121 and the third vertical portion 131. The third connecting portion 32 includes a third connecting horizontal plate 321 connected to the second supporting horizontal plate 311 and a third connecting vertical plate 322 connected to the second supporting vertical plate 312. The third connecting horizontal plate 321 is stacked on top of the second horizontal portion 122, and the third connecting vertical plate 322 is parallel to the second vertical portion 121. The fourth connecting portion 33 includes a fourth connecting horizontal plate 331 connected to the second supporting horizontal plate 311 and a fourth connecting vertical plate 332 connected to the second supporting vertical plate 312. The fourth connecting horizontal plate 331 is stacked on top of the third horizontal portion 132, and the fourth connecting vertical plate 332 is parallel to the third vertical portion 131. A third sealing element 43 is provided at the gap between the third connecting horizontal plate 321 and the second horizontal part 122, the gap between the third connecting vertical plate 322 and the second vertical part 121, the gap between the second supporting vertical plate and the second vertical part 121 and the third vertical part 131, the gap between the fourth connecting vertical plate 332 and the third vertical part 131, and the gap between the fourth connecting horizontal plate 331 and the third horizontal part 132.

[0175] The upper cover plate 51 covers the same end of the two side plates 10, and the lower cover plate 52 covers the other end of the two side plates 10. The first sealing ring 61 is located between the upper cover plate 51 and the ends of the two side plates 10, and the second sealing ring 62 is located between the lower cover plate 52 and the ends of the two side plates 10.

[0176] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. An energy storage device, characterized by, The device includes a housing, which includes two side panels. Each side panel includes a first panel segment, a second panel segment, and a third panel segment arranged sequentially. The first panel segment and the third panel segment are both perpendicularly connected to the second panel segment. Furthermore, the first panel segment and the third panel segment are arranged opposite to each other. The first panel segment and the third panel segment of one side panel are connected to the first panel segment and the third panel segment of the other side panel to form a closed structure.

2. The energy storage device of claim 1, wherein: The first plate segment includes a first vertical portion and two first horizontal portions connected to opposite ends of the first vertical portion; The second plate segment includes a second vertical portion and two second horizontal portions connected to opposite ends of the second vertical portion; The third plate segment includes a third vertical section and two third horizontal sections connected to opposite ends of the third vertical section; The first vertical portion, the second vertical portion, and the third vertical portion are connected in sequence, a first gap is formed between the first horizontal portion and the second horizontal portion, and a second gap is formed between the second horizontal portion and the third horizontal portion.

3. The energy storage device of claim 2, wherein: When two of the side plates are connected, adjacent first vertical portions are welded together, adjacent first horizontal portions are welded together, and adjacent third vertical portions are welded together, and adjacent third horizontal portions are welded together; or... The adjacent first vertical portion and the third vertical portion are welded together, and the adjacent first horizontal portion and the third horizontal portion are welded together.

4. The energy storage device of claim 3, wherein: The weld seams of two adjacent first vertical sections and the weld seams of two adjacent third vertical sections are coated with a first sealant; or... The weld seams of the adjacent first vertical section and the third vertical section are coated with a first sealant.

5. The energy storage device of claim 4, wherein: At least a portion of the first seal coincides with the weld seam of two adjacent first horizontal portions; and at least a portion of the first seal coincides with the weld seam of two adjacent third horizontal portions; or, At least a portion of the first seal coincides with the weld seam of the adjacent first horizontal portion and the third horizontal portion.

6. The energy storage device of claim 2, wherein: The housing also includes a first corner connector, which is located at the first notch. The opposite ends of the first corner connector are respectively connected to the first vertical part and the first horizontal part, and to the second vertical part and the second horizontal part.

7. The energy storage device of claim 6, wherein: The first corner connector includes a first support portion, and a first connecting portion and a second connecting portion disposed at opposite ends of the first support portion. The first connecting portion is welded to the first vertical portion and the first horizontal portion, and the second connecting portion is welded to the second vertical portion and the second horizontal portion.

8. The energy storage device of claim 7, wherein: The first support portion includes a first horizontal support plate and a first vertical support plate perpendicular to the first horizontal support plate. The first horizontal support plate is flush with the first horizontal portion and the second horizontal portion. A first weld is provided between one end of the first horizontal support plate and the first horizontal portion, and a second weld is provided between the other end of the first horizontal support plate and the second horizontal portion. The first vertical support plate is parallel to the first vertical portion and the second vertical portion.

9. The energy storage device of claim 8, wherein: The first connecting portion includes a first connecting horizontal plate connected to the first supporting horizontal plate and a first connecting vertical plate connected to the first supporting vertical plate. The first connecting horizontal plate is stacked on top of the first horizontal portion, and the first connecting vertical plate is parallel to the first vertical portion. The second connecting portion includes a second connecting horizontal plate connected to the first supporting horizontal plate and a second connecting vertical plate connected to the first supporting vertical plate. The second connecting horizontal plate is stacked on top of the second horizontal portion, and the second connecting vertical plate is parallel to the second vertical portion.

10. The energy storage device of claim 9, wherein: A second sealing element is provided at the gap between the first connecting horizontal plate and the first horizontal part, the gap between the first connecting vertical plate and the first vertical part, the gap between the first supporting vertical plate and the first vertical part and the second vertical part, the gap between the second connecting vertical plate and the second vertical part, and the gap between the second connecting horizontal plate and the second horizontal part.

11. The energy storage device of claim 2, wherein: The housing also includes a second corner connector, which is located at the second notch. The two opposite ends of the second corner connector are respectively connected to the second vertical part and the second horizontal part, and to the third vertical part and the third horizontal part.

12. The energy storage device of claim 11, wherein: The second corner connector includes a second support portion, and a third connecting portion and a fourth connecting portion disposed at opposite ends of the second support portion. The third connecting portion is welded to the second vertical portion and the second horizontal portion, and the fourth connecting portion is welded to the third vertical portion and the third horizontal portion.

13. The energy storage device of claim 12, wherein: The second support portion includes a second support horizontal plate and a second support vertical plate perpendicular to the second support horizontal plate. The second support horizontal plate is flush with the second horizontal portion and the third horizontal portion. A third weld is provided between one end of the second support horizontal plate and the second horizontal portion, and a fourth weld is provided between the other end of the second support horizontal plate and the third horizontal portion. The second support vertical plate is parallel to the second vertical portion and the third vertical portion.

14. The energy storage device of claim 13, wherein: The third connecting part includes a third connecting horizontal plate connected to the second supporting horizontal plate and a third connecting vertical plate connected to the second supporting vertical plate. The third connecting horizontal plate is stacked on top of the second horizontal part, and the third connecting vertical plate is parallel to the second vertical part. The fourth connecting part includes a fourth connecting horizontal plate connected to the second supporting horizontal plate and a fourth connecting vertical plate connected to the second supporting vertical plate. The fourth connecting horizontal plate is stacked on top of the third horizontal part, and the fourth connecting vertical plate is arranged parallel to the third vertical part.

15. The energy storage device of claim 14, wherein: A third sealing element is provided at the gap between the third connecting horizontal plate and the second horizontal part, the gap between the third connecting vertical plate and the second vertical part, the gap between the second supporting vertical plate and the second vertical part and the third vertical part, the gap between the fourth connecting vertical plate and the third vertical part, and the gap between the fourth connecting horizontal plate and the third horizontal part.

16. The energy storage device of any one of claims 1 to 15, wherein: The housing also includes an upper cover plate, a lower cover plate opposite to the upper cover plate, a first sealing ring, and a second sealing ring. The upper cover plate covers the same end of the two side plates, and the lower cover plate covers the other end of the two side plates. The first sealing ring is located between the upper cover plate and the ends of the two side plates, and the second sealing ring is located between the lower cover plate and the ends of the two side plates.

17. An energy storage system characterized by: Includes the energy storage device as described in any one of claims 1 to 16.

18. An electrical device, comprising: It includes the energy storage device as described in any one of claims 1 to 16, or the energy storage system as described in claim 17.

19. A charging network characterized by: It includes a charging pile and an energy storage device as described in any one of claims 1 to 16, or an energy storage system as described in claim 17, wherein the energy storage device is used to provide electrical energy to the charging pile.

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