Energy storage device, energy storage system and power utilization device

Abstract

The invention relates to the technical field of energy storage, and discloses an energy storage device, an energy storage system and a power utilization device. The energy storage device comprises a box body and a battery pack. The box body is provided with a first guide rail and a second guide rail which are spaced, the first guide rail is provided with a first guide surface, and the second guide rail is provided with a second guide surface. The battery pack is provided with a shell, a plurality of first protruding blocks and a plurality of second protruding blocks, the first protruding blocks and the second protruding blocks are arranged on one side of the shell at intervals in the first direction, the first protruding blocks can slide on the first guiding face and abut against the position between the shell and the first guiding face, and the second protruding blocks can slide on the second guiding face and abut against the position between the shell and the second guiding face. The size of the first protruding block and the size of the second protruding block in the first direction range from 5 mm to 100 mm, and the size of the shell in the first direction is smaller than or equal to the size of the first guiding face and the size of the second guiding face in the first direction. According to the energy storage device, the energy storage system and the power utilization device provided by the invention, the convenience during the installation of the battery pack can be improved.

Description

Technical Field

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

[0002] With the continuous development of new energy technologies, the ability of various power generation devices to convert electrical energy is constantly improving, and the application of energy storage devices is becoming increasingly widespread. The abundant electrical energy converted by various power generation devices can be stored through energy storage devices for easy output at any time. However, as the capacity of energy storage devices increases, the weight of the battery packs also increases.

[0003] Energy storage devices typically incorporate a large number of battery packs. The cells within these packs possess excellent charge-discharge cycle characteristics, enabling them to meet the diverse application requirements of energy storage devices. The assembly structure of the battery pack within the energy storage device significantly impacts its ease of assembly. Therefore, designing the battery pack installation structure within an energy storage device to enhance installation convenience is a crucial issue. Summary of the Invention

[0004] The purpose of this application is to provide an energy storage device, an energy storage system, and an electrical device that can improve the convenience of battery pack installation.

[0005] To address the aforementioned technical problems, embodiments of this application provide an energy storage device. The energy storage device includes a housing and a battery pack. The housing is provided with a first guide rail and a second guide rail spaced apart. The first guide rail is provided with a first guide surface, and the second guide rail is provided with a second guide surface. The battery pack is provided with a casing, and a plurality of first protrusions and a plurality of second protrusions spaced apart along a first direction on one side of the casing. The first protrusions are slidable on the first guide surface and abut against the casing and the first guide surface. The second protrusions are slidable on the second guide surface and abut against the casing and the second guide surface. The dimensions of the first and second protrusions in the first direction are 5mm to 100mm, and the dimension of the casing in the first direction is less than or equal to the dimensions of the first and second guide surfaces in the first direction.

[0006] The embodiments of this application also provide an energy storage system, which includes the energy storage device described above.

[0007] The embodiments of this application also provide an electrical device, which includes the energy storage device described above.

[0008] The energy storage device, energy storage system, and power consumption device provided in this application utilize different guide rails installed inside the housing to realize the insertion and removal of the battery pack. The guide rails provide support and guidance during the insertion and removal of the battery pack. The battery pack uses a first protrusion and a second protrusion on one side of the housing to cooperate with different guide rails. The first protrusion can slide on a first guide surface of the first guide rail, and the second protrusion can slide on a second guide surface of the second guide rail. By having smaller protrusions slide on the guide rails, the contact area between the battery pack and the guide rails can be reduced, thereby reducing the resistance during battery pack installation and improving the convenience of battery pack installation.

[0009] In some embodiments, a first recess is provided in the middle of the first protrusion, the first recess being away from the first guide surface, and a second recess is provided in the middle of the second protrusion, the second recess being away from the second guide surface.

[0010] In some embodiments, the first protrusion is provided at both ends of the first protrusion, and both the first protrusion and the first recess are provided with first mounting holes for fasteners to pass through and be fixed to the housing.

[0011] In some embodiments, the second protrusion is provided at both ends of the second protrusion, and both the second protrusion and the second recess are provided with second mounting holes for fasteners to pass through and be fixed to the housing.

[0012] In some embodiments, the coefficient of friction of the first protrusion on the first guide surface is less than the coefficient of friction of the housing on the first guide surface, and the coefficient of friction of the second protrusion on the second guide surface is less than the coefficient of friction of the housing on the second guide surface.

[0013] In some embodiments, the first guide rail includes a first support portion and a first extension portion connected together, the first support portion abutting against a first protrusion, and the first extension portion located on one side of the housing; the second guide rail includes a second support portion and a second extension portion connected together, the second support portion abutting against a second protrusion, and the second extension portion located on the other side of the housing.

[0014] In some embodiments, a first limiting part is provided on the side of the first extension near the second extension, and the first limiting part abuts against the side of the housing away from the first protrusion. A second limiting part is provided on the side of the second extension near the first extension, and the second limiting part abuts against the side of the housing away from the second protrusion.

[0015] In some embodiments, a first limiting block is provided on the side of the housing away from the first protrusion, and the first limiting block abuts against the first limiting portion. A second limiting block is provided on the side of the housing away from the second protrusion, and the second limiting block abuts against the second limiting portion.

[0016] In some implementations, the first limiting block and the second limiting block are elastic.

[0017] In some embodiments, a first protrusion with a bend is provided at the edge of the first support portion, and a second protrusion with a bend is provided at the edge of the second support portion, with the first and second protrusions confined to the same side of the housing.

[0018] In some embodiments, a first guide portion is provided on the side of the first extension near the second extension, and a second guide portion is provided on the side of the second extension near the first extension. Along the first direction, the first guide portion and the second guide portion are closer to the housing.

[0019] In some embodiments, along the first direction, the two side edges of the first protrusion are set to be arc-shaped, and the two side edges of the second protrusion are set to be arc-shaped.

[0020] In some embodiments, the first protrusion is provided with a first weight-reducing hole, and the second protrusion is provided with a second weight-reducing hole. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 This is a cross-sectional structural schematic diagram of an energy storage device provided in some embodiments of this application; Figure 2 This is a schematic diagram of the assembly structure of the battery pack in the energy storage device provided in some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the first guide rail in an energy storage device provided in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of the second guide rail in an energy storage device provided in some embodiments of this application; Figure 5 This is a three-dimensional structural schematic diagram of a battery pack in an energy storage device provided in some embodiments of this application; Figure 6 yes Figure 5 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the structure of the first protrusion at the bottom of the battery pack in some embodiments of the energy storage device provided in this application; Figure 8 This is a three-dimensional structural diagram of the battery pack in the energy storage device provided in some embodiments of this application from another perspective; Figure 9 yes Figure 8 Enlarged structural diagram at point B; Figure 10 This is a schematic diagram of the structure of the second protrusion at the bottom of the battery pack in an energy storage device provided in some embodiments of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0024] 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.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," and "joining" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0026] Energy storage devices house a large number of battery packs within a defined space. Each battery pack contains a significant number of battery cells, and the storage unit's enclosure provides ample space for these packs, enabling the storage of more electrical energy. The enclosure typically includes a dedicated space for the battery packs, which are usually housed in a battery rack. The uprights within the battery rack provide stable support for the battery packs. Due to the weight of the battery packs, the available space around the rack is limited, necessitating the use of guide rails for quick and accurate placement in the installation location. During installation, the battery packs are placed on the guide rails, moved along them to the designated installation position, and then secured.

[0027] In other words, the guide rails have mating parts, and the assembly of different battery packs inside the casing is achieved through the side guide rails. However, during the overall installation of the battery packs, there are still problems with mating difficulties and inconvenient assembly and disassembly.

[0028] To improve the ease of battery pack installation, some embodiments of this application provide an energy storage device in which the battery pack uses a protrusion that engages with a guide rail. The small size of the protrusion reduces resistance during battery pack installation. The battery pack can be inserted or removed by sliding the protrusion on the guide rail, and the guide rail supports the battery pack through the protrusion, thus avoiding assembly difficulties and wear problems caused by the battery pack sliding on the guide rail as a whole.

[0029] The following is combined Figures 1 to 10 This application describes the structure of an energy storage device provided in some embodiments.

[0030] like Figures 1 to 10 As shown, some embodiments of this application provide an energy storage device including a housing 10 and a battery pack 20. The housing 10 is provided with a spaced-apart first guide rail 11 and a second guide rail 12. The first guide rail 11 is provided with a first guide surface 1101, and the second guide rail 12 is provided with a second guide surface 1201. The battery pack 20 is provided with a housing 21, and along a first direction (… Figure 5 and Figure 8 (In the direction indicated by the middle arrow X) A plurality of first protrusions 22 and a plurality of second protrusions 23 are spaced apart on one side of the housing 21. The first protrusions 22 can slide on the first guide surface 1101 and abut against the housing 21 and the first guide surface 1101. The second protrusions 23 can slide on the second guide surface 1201 and abut against the housing 21 and the second guide surface 1201. The dimensions of the first protrusions 22 and the second protrusions 23 in the first direction are 5mm to 100mm. The dimensions of the housing 21 in the first direction are less than or equal to the dimensions of the first guide surface 1101 and the second guide surface 1201 in the first direction.

[0031] The container 10 refers to an object with a receiving cavity. As an example, the container 10 can be a standard 20-foot shipping container. In some embodiments, the container 10 is a steel shipping container to ensure that the container 10 of the containerized energy storage device has explosion-proof, fire-proof, and corrosion-resistant properties. The container 10 can provide receiving space for other components and play a protective role. In order to facilitate the installation of battery packs 20, a battery rack 100 can be set inside the container 10. The battery rack 100 uses columns as the supporting foundation for different battery packs 20. First guide rails 11 and second guide rails 12 can be respectively set at corresponding positions on different columns to facilitate the loading and unloading of battery packs 20 and to limit the positioning of battery packs 20.

[0032] The first guide rail 11 and the second guide rail 12 are spaced apart inside the housing 10. The area between the first guide rail 11 and the second guide rail 12 forms the mounting area for the battery pack 20, which can be installed along the first guide rail 11 and the second guide rail 12. The first guide rail 11 and the second guide rail 12 can be arranged sequentially along the height direction of the housing 10, and one or more sets can be arranged inside the housing 10 to install one or more sets of battery packs 20. One set of battery packs 20 can form a battery cluster, and multiple sets of battery packs 20 can form multiple battery clusters.

[0033] The battery pack 20 is the energy storage component of the energy storage device. The battery pack 20 is housed within the receiving cavity of the housing 10. There can be multiple battery packs 20, which can form one or more battery clusters. For example, there are four battery clusters, arranged at intervals within the housing 10. "Multiple" here refers to two or more. A single battery cluster comprises multiple battery packs 20, which are connected together in series, parallel, or series-parallel connections.

[0034] The battery pack 20 includes a housing 21 and multiple battery cells located within the housing 21. Each battery cell is an energy storage unit of the battery pack 20, and the multiple cells are connected in series, parallel, or a combination of series and parallel connections. Multiple battery cells can be connected in a specific number to form a battery module, and the number of battery modules within the housing 21 can be one or more. The housing 21 forms the encapsulation shell of the battery pack, protecting the internal battery cells. A circuit interface can be provided on the housing 21 to connect the battery pack 20 to the circuitry of an energy storage device. The housing 21 can adopt a split structure with a bottom shell and a top cover, where the bottom shell forms an inner cavity and the top cover closes the opening at the top of the bottom shell. Alternatively, the housing 21 can adopt an enclosed structure with strip-shaped components. The bottom of the housing 21 is connected end-to-end by multiple rectangular tubes to form a frame, the top side of the frame is connected by the top cover, and the bottom side of the frame can be connected to a liquid cooling plate. The liquid cooling plate is the part in the battery pack 20 that serves to dissipate heat and can also be used to support different battery cells.

[0035] The battery pack 20 has a first protrusion 22 and a second protrusion 23 on one side of its housing 21, with the first protrusion 22 and the second protrusion 23 located near different side edges of the battery pack 20. The first direction is the mounting direction of the battery pack 20, which is parallel to the depth direction of the housing 10. The first protrusion 22 and the second protrusion 23 form a protruding shape at the bottom of the housing 21, which can replace the surface of the housing 21 to cooperate with the guide surface of the guide rail.

[0036] The dimensions of the first protrusion 22 and the second protrusion 23 in the first direction can be set to a minimum of 5mm and a maximum of 100mm, and can actually be 5mm~25mm, 25mm~45mm, 45mm~65mm, 65mm~85mm, or 85mm~100mm, for example, 5mm, 15mm, 20mm, 30mm, 50mm, 70mm, 90mm, or 100mm. By controlling the dimensions of the first protrusion 22 and the second protrusion 23 in the first direction, the contact area between the first protrusion 22 and the second protrusion 23 and their respective guide rails can be controlled. This avoids affecting the structural strength due to small dimensions, and also avoids increasing the resistance when the battery pack 20 moves relative to the guide rail due to large dimensions. Thus, while ensuring the structural strength, the resistance during installation of the battery pack 20 is reduced.

[0037] The size of the housing 21 in the first direction is less than or equal to the size of the first guide surface 1101 and the second guide surface 1201 in the first direction, that is, the battery pack 20 can be completely slid into the installation area defined by the first guide rail 11 and the second guide rail 12, ensuring the stability of the battery pack 20 after installation.

[0038] The energy storage device utilizes different guide rails installed within the housing 10 to facilitate the insertion and removal of the battery pack 20. These guide rails provide support and guidance during the insertion and removal process. The battery pack 20 uses a first protrusion 22 and a second protrusion 23 on the surface of the housing 21 to engage with different guide rails. The first protrusion 22 can slide on the first guide surface 1101 of the first guide rail 11, and the second protrusion 23 can slide on the second guide surface 1201 of the second guide rail 12. By using smaller protrusions, the contact area between the battery pack 20 and the guide rails can be reduced, thereby reducing the resistance during installation and improving the ease of installation.

[0039] In some embodiments, a first recess 221 may be provided in the middle of the first protrusion 22, and the first recess 221 is away from the first guide surface 1101. A second recess 231 may be provided in the middle of the second protrusion 23, and the second recess 231 is away from the second guide surface 1201.

[0040] The first protrusion 22 has a recessed shape in its middle, and the first recessed portion 221 is located away from the first guide surface 1101 of the first guide rail 11, forming a recess in the middle of the first protrusion 22 towards the housing 21. The protruding portion of the first protrusion 22 is divided into two parts by the first recessed portion 221 in the first direction, and the two parts respectively form contact areas with the first guide rail 11. By using the first recessed portion 221 to avoid the first guide rail 11, it can play a buffering role, reduce the contact area between the first protrusion 22 and the first guide rail 11, and interrupt the front and rear parts of the first protrusion 22, thus acting as a barrier to block the transmission of force and prevent mutual interference. In practice, the first protrusion 22 may have one or more first recessed portions 221.

[0041] The second protrusion 23 has a recessed center, with the second recess 231 located away from the second guide surface 1201 of the second guide rail 12. The center of the second protrusion 23 is recessed towards the housing 21. The protruding portion of the second protrusion 23 is divided into two parts by the second recess 231 in the first direction, and each part forms a contact area with the second guide rail 12. By using the second recess 231 to avoid the second guide rail 12, a buffering effect is achieved, reducing the contact area between the second protrusion 23 and the second guide rail 12. It also interrupts the connection between the front and rear parts of the second protrusion 23, acting as a barrier to prevent force transmission and avoid mutual interference. In practice, the second protrusion 23 may have one or more second recesses 231.

[0042] like Figure 7 As shown, the first protrusion 22 has a first protrusion 222 at each end, and both the first protrusion 222 and the first recess 221 are provided with a first mounting hole 223. The first mounting hole 223 allows fasteners to pass through and be fixed to the housing 21.

[0043] Both the first protrusion 222 and the first recess 221 can fit against the bottom of the battery pack 20 and are connected to the housing 21 by fasteners. The first protrusion 222 is located at the end of the first protrusion 22 and is away from the first guide surface 1101, providing an assembly position at the end. By providing first mounting holes 223 at multiple positions at the end and middle of the first protrusion 22, it can be fixed to the housing 21 at multiple positions, thereby ensuring the tightness of the connection between the first protrusion 22 and the housing 21, ensuring the connection strength at the location of the first protrusion 22, and preventing the first protrusion 22 from affecting the normal installation of the battery pack 20 due to loose connection.

[0044] like Figure 10 As shown, the second protrusion 23 has a second protrusion 232 at each end, and the second protrusion 232 and the second recess 231 are both provided with a second mounting hole 233, through which fasteners pass and are fixed to the housing 21.

[0045] Both the second protrusion 232 and the second recess 231 can fit against the bottom of the battery pack 20 and are connected to the housing 21 by fasteners. The second protrusion 232 is located at the end of the second protrusion 23 and is away from the second guide surface 1201, providing an assembly position at the end. By providing second mounting holes 233 at multiple positions at the end and middle of the second protrusion 23, it can be fixed to the housing 21 at multiple positions, thereby ensuring the tightness of the connection between the second protrusion 23 and the housing 21, ensuring the connection strength at the location of the second protrusion 23, and preventing the second protrusion 23 from affecting the normal installation of the battery pack 20 due to loose connection.

[0046] In some embodiments, the first protrusion 22 may be disposed opposite to the second protrusion 23, and a crossbeam may be disposed between the opposite first protrusion 22 and the second protrusion 23, the crossbeam abutting against one side of the housing 21.

[0047] The first protrusion 22 and the second protrusion 23 are correspondingly arranged, with the shortest distance between them, and they are distributed in a straight line. By setting up a crossbeam, the first protrusion 22 and the second protrusion 23 can be connected to form a whole. The main body of the crossbeam corresponds to the bottom of the battery pack 20, and both ends of the crossbeam are connected to the first protrusion 22 and the second protrusion 23 respectively. The transformation of the first protrusion 22 and the second protrusion 23 from an isolated state to a unified state enhances the overall structural strength and improves structural stability during sliding.

[0048] Furthermore, the crossbeam can abut against one side of the housing 21 and against the bottom of the battery pack 20. Both ends of the crossbeam are connected to the housing 21 via protrusions, thereby sharing the load on the bottom of the battery pack 20 and providing support. In practice, the crossbeam's cross-section can be designed with an uneven shape, such as a wavy shape, to improve its load-bearing capacity.

[0049] like Figure 6 and Figure 9 As shown, the housing 21 may include a first rectangular tube 211 and a second rectangular tube 212 spaced apart. A first hollow area may be provided on the side of the first rectangular tube 211 away from the second rectangular tube 212, and a second hollow area may be provided on the side of the second rectangular tube 212 away from the first rectangular tube 211. A first protrusion 22 includes an adjacent first main body portion and a first abutting portion, the first abutting portion passing through the first hollow area and abutting against opposite sides of the bottom wall of the first rectangular tube 211. A second protrusion 23 includes an adjacent second main body portion and a second abutting portion, the second abutting portion passing through the second hollow area and abutting against opposite sides of the bottom wall of the second rectangular tube 212.

[0050] The first rectangular tube 211 and the second rectangular tube 212 form the frame of the battery pack 20. The first rectangular tube 211 is adjacent to the first guide rail 11, and the second rectangular tube 212 is adjacent to the second guide rail 12. The first rectangular tube 211 provides a fixing base for the first protrusion 22, which can be connected to the first rectangular tube 211 by fasteners. The second rectangular tube 212 provides a fixing base for the second protrusion 23, which can be connected to the second rectangular tube 212 by fasteners.

[0051] The first rectangular tube 211 and the second rectangular tube 212 each have a hollowed-out area on their respective sides, and the hollowed-out areas are connected to the interior of the rectangular tubes. The first abutting portion of the first protrusion 22 can extend into the interior of the first rectangular tube 211 through the first hollowed-out area, and then clamp with the first main body portion on opposite sides of the bottom wall of the first rectangular tube 211, and be fixed to the bottom wall of the first rectangular tube 211. The first main body portion can abut against one side of the outer wall surface of the first rectangular tube 211, and the first abutting portion can abut against one side of the inner wall surface of the first rectangular tube 211, thereby forming a clamping shape to ensure a tight connection between the first protrusion 22 and the housing 21.

[0052] The second abutting portion of the second protrusion 23 can extend into the interior of the second rectangular tube 212 through the second hollow area, and then clamp with the second main body portion on opposite sides of the bottom wall of the second rectangular tube 212, and be fixed to the bottom wall of the second rectangular tube 212. The second main body portion can abut against one side of the outer wall surface of the second rectangular tube 212, and the second abutting portion can abut against one side of the inner wall surface of the second rectangular tube 212, thereby forming a clamping shape to ensure the tight connection between the second protrusion 23 and the housing 21.

[0053] In practice, the first protrusion 22 and the second protrusion 23 can also be offset in the direction perpendicular to the first direction.

[0054] In some embodiments, the coefficient of friction of the first protrusion 22 on the first guide surface 1101 may be less than the coefficient of friction of the housing 21 on the first guide surface 1101, and the coefficient of friction of the second protrusion 23 on the second guide surface 1201 may be less than the coefficient of friction of the housing 21 on the second guide surface 1201.

[0055] The first protrusion 22 and the second protrusion 23 are made of a material that has a low coefficient of friction with the guide rail. Compared to the sliding of the battery pack 20 housing 21 on the guide surfaces of different guide rails, the first protrusion 22 and the second protrusion 23 can generate a small frictional force with the guide rail when the battery pack 20 moves relative to the guide rail, thereby reducing the resistance when the battery pack 20 moves relative to the guide rail and facilitating the installation process of the battery pack 20. For example, the battery pack 20 housing 21 can be made of metal, while the first protrusion 22 and the second protrusion 23 can be made of plastic.

[0056] In some embodiments, the first guide rail 11 may include a first support portion 111 and a first extension portion 112 connected together, the first support portion 111 abutting against a first protrusion 22, and the first extension portion 112 located on one side of the housing 21. The second guide rail 12 may include a second support portion 121 and a second extension portion 122 connected together, the second support portion 121 abutting against a second protrusion 23, and the second extension portion 122 located on the other side of the housing 21.

[0057] The guide rail comprises multiple parts, each serving a specific function. The first support portion 111 and the second support portion 121 provide support at the bottom of the battery pack 20, distributing the weight of the battery pack 20. The first extension portion 112 and the second extension portion 122 are located on one side of the battery pack 20, defining the mounting area of ​​the battery pack 20 and ensuring that the installation process of the battery pack 20 does not deviate from the correct orientation.

[0058] like Figure 3 and Figure 4 As shown, the first guide rail 11 and the second guide rail 12 are arranged in an L-shape. The first support portion 111 and the second support portion 121 are located on the same plane, and the first extension portion 112 and the second extension portion 122 are located on two parallel planes. The upper surface of the first support portion 111 forms a first guide surface 1101, which cooperates with the first protrusion 22. The upper surface of the second support portion 121 forms a second guide surface 1201, which cooperates with the second protrusion 23. After the battery pack 20 is installed in place, the first extension portion 112 and the second extension portion 122 are located on opposite sides of the battery pack 20.

[0059] In some embodiments, a first limiting portion 113 may be provided on the side of the first extension 112 near the second extension 122, and the first limiting portion 113 abuts against the side of the housing 21 away from the first protrusion 22. A second limiting portion 123 may be provided on the side of the second extension 122 near the first extension 112, and the second limiting portion 123 abuts against the side of the housing 21 away from the second protrusion 23.

[0060] The first limiting part 113 acts as a limiting part on the side of the battery pack 20 away from the first protrusion 22, and the second limiting part 123 acts as a limiting part on the side of the battery pack 20 away from the second protrusion 23. The limiting parts can cooperate with the side of the battery pack 20's housing 21 away from the protrusion, limiting the battery pack 20 from above while the supporting part supports the protrusion, thereby fixing the battery pack 20 at a specific height position and ensuring the battery pack 20 is securely fixed. The left and right sides of the battery pack 20 can be limited by protruding structures on the guide rail, and the front and rear sides of the battery pack 20 can be limited by locking members connected to the guide rail, thereby defining the installation position of the battery pack 20 in space.

[0061] In some embodiments, a first limiting block 24 may be provided on the side of the housing 21 away from the first protrusion 22, and the first limiting block 24 abuts against the first limiting portion 113. A second limiting block 25 may be provided on the side of the housing 21 away from the second protrusion 23, and the second limiting block 25 abuts against the second limiting portion 123.

[0062] In other words, the battery pack 20 has a limit block on the other side of the corresponding protrusion. The limit block can cooperate with the limit part on the guide rail. By using the limit part to abut against the limit block, the position of the battery pack 20 in the height direction is restricted and it is in an effectively fixed state.

[0063] like Figure 3 As shown, the first limiting portion 113 on the first guide rail 11 can be configured with a mating shape that is inclined on both sides and flat in the middle. During the movement of the battery pack 20 relative to the first guide rail 11, the first limiting block 24 can contact the middle of the first limiting portion 113 until it forms complete contact with the middle of the first limiting portion 113. Figure 4 As shown, the second limiting part 123 on the second guide rail 12 can be configured with a mating shape that is inclined on both sides and flat in the middle. During the movement of the battery pack 20 relative to the second guide rail 12, the second limiting block 25 can contact the middle of the second limiting part 123 until it completely abuts against the middle of the second limiting part 123.

[0064] like Figure 5 and Figure 6 As shown, the first limiting block 24 can be fixed to the side of the housing 21 opposite to the first protrusion 22 by fasteners. The first limiting block 24 can be directly opposite the first protrusion 22 or offset from it. The first limiting block 24 can be provided with a through hole so that the first limiting block 24 deforms when it mates with the first limiting part 113 on the first guide rail 11, thus avoiding affecting the normal installation of the battery pack 20.

[0065] like Figure 8 and Figure 9 As shown, the second limiting block 25 can be fixed to the side of the housing 21 opposite to the second protrusion 23 by fasteners. The second limiting block 25 can be directly opposite the second protrusion 23 or offset from it. The second limiting block 25 can be provided with a through hole so that the second limiting block 25 deforms when it mates with the second limiting part 123 on the second guide rail 12, thus avoiding affecting the normal installation of the battery pack 20.

[0066] In some embodiments, the first limiting block 24 and the second limiting block 25 may be elastic.

[0067] By using elastic materials to manufacture the first limiting block 24 and the second limiting block 25, the first limiting block 24 can avoid obstructing the normal installation of the battery pack 20 during its engagement with the first limiting part 113 and the second limiting block 25 can avoid obstructing the normal installation of the battery pack 20. Furthermore, after the battery pack 20 is installed in place, the first limiting block 24 can form a tight abutment with the first limiting part 113, and the second limiting block 25 can form a tight abutment with the second limiting part 123.

[0068] like Figure 5 and Figure 8 As shown, the protrusions and limiting blocks can be assembled using the frame of the battery pack 20, forming a protruding portion of the battery pack 20 at the frame. The first protrusion 22 and the second protrusion 23 can be fixed to the bottom side of the protruding portion, and the first limiting block 24 and the second limiting block 25 can be fixed to the top side of the protruding portion.

[0069] like Figure 3 and Figure 4 As shown, a first protrusion 114 with a bend and extension may be provided at the edge of the first support portion 111, and a second protrusion 124 with a bend and extension may be provided at the edge of the second support portion 121. The first protrusion 114 and the second protrusion 124 are confined to the same side of the housing 21.

[0070] The protrusions at the edge of the guide rail can abut against one side of the battery pack 20, preventing the battery pack 20 from being installed too far over. Specifically, the first protrusion 114 is located at the edge of the first support 111, and the second protrusion 124 is located at the edge of the second support 121, both corresponding to the rear of the battery pack 20 installation path. Both the first protrusion 114 and the second protrusion 124 have a bent and extended shape, which can block the end of the battery pack 20 installation path, thereby preventing the battery pack 20 from deviating from the correct fixed position due to lack of restraint during installation.

[0071] In practice, the housing 21 of the installed battery pack 20 can be spaced apart from the first protrusion 114 and the second protrusion 124, or it can abut against the first protrusion 114 and the second protrusion 124.

[0072] In some embodiments, the first support portion 111 may be provided with a first positioning groove, which accommodates the first protrusion 22. The second support portion 121 may be provided with a second positioning groove, which accommodates the second protrusion 23.

[0073] The positioning groove can accommodate the protrusion, allowing it to fall into the groove after the battery pack 20 is installed, thus determining whether the battery pack 20 is properly installed. After the battery pack 20 is installed, the first protrusion 22 enters the first positioning groove, and the second protrusion 23 enters the second positioning groove. The battery pack 20 will then sink, providing a tactile feedback indicating whether it is properly installed. Furthermore, the positioning groove restricts the position of the protrusion, limiting its free movement and acting as a limiting mechanism. To facilitate the removal of the battery pack 20, the first and second positioning grooves can be arc-shaped along their edges in the first direction, allowing the protrusion to be easily removed under external force.

[0074] like Figure 3 and Figure 4 As shown, a first guide portion 115 may be provided on the side of the first extension 112 near the second extension 122, and a second guide portion 125 may be provided on the side of the second extension 122 near the first extension 112. Along the first direction, the first guide portion 115 and the second guide portion 125 are closer to the housing 21.

[0075] The first guide portion 115 is a protruding part on the first extension portion 112. When the battery pack 20 moves relative to the first guide rail 11, it can be close to the housing 21 of the battery pack 20. When the battery pack 20 deviates from the correct trajectory, it can make a fine adjustment to the position of the battery pack 20 so that the battery pack 20 returns to the movement path restricted by the first guide portion 115.

[0076] The second guide portion 125 is a part that protrudes from the second extension portion 122. When the battery pack 20 moves relative to the second guide rail 12, it can be close to the housing 21 of the battery pack 20. When the battery pack 20 deviates from the correct trajectory, it can make a fine adjustment to the position of the battery pack 20 so that the battery pack 20 returns to the movement path restricted by the second guide portion 125.

[0077] In practice, both the first guide portion 115 and the second guide portion 125 can be configured as gradually protruding arc shapes to serve a guiding function. Special structures can also be designed in certain locations on the battery pack 20 housing 21, such as a traction structure for assembling and disassembling the battery pack 20, which may include tooling mating holes or handles. This localized structural design facilitates the assembly of the battery pack 20 with the guide rail and its disassembly.

[0078] like Figure 7 As shown, along the first direction, the two side edges of the first protrusion 22 can be set to an arc shape; as... Figure 10 As shown, along the first direction, the two sides of the second protrusion 23 can be set to be arc-shaped.

[0079] The two sides of the protrusion are set to be arc-shaped, which can be used to transition between the two sides and avoid forming sharp shapes at the edges. This avoids the impact caused by sharp shapes and ensures the stability of the battery pack 20 during installation.

[0080] like Figure 7 As shown, the first protrusion 22 is arc-shaped at both sides of the first direction. The arc-shaped edge not only avoids the protrusion but also reduces the contact area with the first guide surface 1101, thereby reducing the impact of frictional resistance.

[0081] like Figure 10 As shown, the second protrusion 23 is arc-shaped at both sides of the first direction. The arc-shaped edge not only avoids the protrusion but also reduces the contact area with the second guide surface 1201, thereby reducing the impact of frictional resistance.

[0082] In addition, the first protrusion 22 can be provided with a first weight reduction hole 224, and the second protrusion 23 can be provided with a second weight reduction hole 234.

[0083] Different bumps can reduce their own weight by using the weight-reducing holes they have set, and they can also facilitate their own structural deformation and buffer the impact caused by external forces.

[0084] like Figure 7 As shown, the thicker protruding part of the first protrusion 22 is provided with a plurality of first weight reduction holes 224. The plurality of first weight reduction holes 224 are arranged in an array. The first weight reduction holes 224 are set as blind holes, and the depth of the first weight reduction holes 224 can be controlled.

[0085] like Figure 10 As shown, the thicker protruding part of the second protrusion 23 is provided with a plurality of second weight-reducing holes 234, which are arranged in an array. The second weight-reducing holes 234 are set as blind holes, which can control the depth of the second weight-reducing holes 234.

[0086] Figure 2 In the battery pack 20 shown, there are four first protrusions 22 and four second protrusions 23. Each first protrusion 22 on one side can form eight contact surfaces with the first guide surface 1101, and each second protrusion 23 on one side can form eight contact surfaces with the second guide surface 1201. Taking the first protrusion 22 as an example, each first protrusion 22 on one side can form a contact surface of approximately 5000 mm with the first guide surface 1101. 2The total weight of the cells in the battery pack 20 is approximately 1 ton, with each contact surface bearing about 1 kg per square millimeter. In practice, the force can be controlled to be between 0.5 kg and 5 kg per square millimeter. Furthermore, the load-bearing capacity of the bumps can be adjusted by changing the bottom surface area; a larger area results in a smaller load distributed per unit area. The length and width of the bump bottom surface can be controlled between 5 mm and 100 mm.

[0087] Some embodiments of this application also provide an energy storage system, which includes the energy storage device described above.

[0088] Energy storage devices include, but are not limited to, residential energy storage cabinets, commercial energy storage cabinets, energy storage containers, energy storage racks, energy storage power stations, or portable energy storage devices. Energy storage systems may also include energy management systems (EMS), battery management systems (BMS), and power conversion systems (PCS).

[0089] Some embodiments of this application also provide an electrical device, which includes the energy storage device described above.

[0090] Electrical devices include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, etc.

[0091] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. An energy storage device, characterized in that, include: The housing is provided with a first guide rail and a second guide rail spaced apart. The first guide rail is provided with a first guide surface, and the second guide rail is provided with a second guide surface. The battery pack includes a housing and a plurality of first protrusions and a plurality of second protrusions spaced apart on one side of the housing along a first direction. The first protrusions are slidable on a first guide surface and abut against the housing and the first guide surface. The second protrusions are slidable on a second guide surface and abut against the housing and the second guide surface. The dimensions of the first protrusions and the second protrusions in the first direction are 5mm to 100mm. The dimensions of the housing in the first direction are less than or equal to the dimensions of the first guide surface and the second guide surface in the first direction.

2. The energy storage device according to claim 1, characterized in that, The first protrusion has a first recess in the middle, which is far from the first guide surface. The second protrusion has a second recess in the middle, which is far from the second guide surface.

3. The energy storage device according to claim 2, characterized in that, The first protrusion has a first protrusion at each end, and both the first protrusion and the first recess have a first mounting hole for fasteners to pass through and fix to the housing.

4. The energy storage device according to claim 2, characterized in that, The second protrusion has a second protrusion at each end, and both the second protrusion and the second recess have a second mounting hole for fasteners to pass through and fix to the housing.

5. The energy storage device according to claim 1, characterized in that, The friction coefficient of the first protrusion on the first guide surface is less than the friction coefficient of the housing on the first guide surface, and the friction coefficient of the second protrusion on the second guide surface is less than the friction coefficient of the housing on the second guide surface.

6. The energy storage device according to claim 1, characterized in that, The first guide rail includes a first support portion and a first extension portion connected together. The first support portion abuts against the first protrusion, and the first extension portion is located on one side of the housing. The second guide rail includes a second support portion and a second extension portion connected together. The second support portion abuts against the second protrusion, and the second extension portion is located on the other side of the housing.

7. The energy storage device according to claim 6, characterized in that, A first limiting part is provided on the side of the first extension near the second extension, and the first limiting part abuts against the side of the housing away from the first protrusion. A second limiting part is provided on the side of the second extension near the first extension, and the second limiting part abuts against the side of the housing away from the second protrusion.

8. The energy storage device according to claim 7, characterized in that, A first limiting block is provided on the side of the housing away from the first protrusion, and the first limiting block abuts against the first limiting part. A second limiting block is provided on the side of the housing away from the second protrusion, and the second limiting block abuts against the second limiting part.

9. The energy storage device according to claim 8, characterized in that, The first limiting block and the second limiting block are elastic.

10. The energy storage device according to claim 6, characterized in that, The first support portion has a bent and extended first protrusion at its edge, and the second support portion has a bent and extended second protrusion at its edge, with the first protrusion and the second protrusion confined to the same side of the housing.

11. The energy storage device according to claim 6, characterized in that, A first guide portion is provided on the side of the first extension portion near the second extension portion, and a second guide portion is provided on the side of the second extension portion near the first extension portion. Along the first direction, the first guide portion and the second guide portion are closer to the housing.

12. The energy storage device according to claim 1, characterized in that, Along the first direction, the two sides of the first protrusion are set to be arc-shaped, and the two sides of the second protrusion are set to be arc-shaped.

13. The energy storage device according to claim 1, characterized in that, The first protrusion is provided with a first weight-reducing hole, and the second protrusion is provided with a second weight-reducing hole.

14. An energy storage system, characterized in that, Includes the energy storage device as described in any one of claims 1 to 13.

15. An electrical appliance, characterized in that, Includes the energy storage device as described in any one of claims 1 to 13.

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