Energy storage device

Abstract

The embodiment of the invention provides an energy storage device, and relates to the field of energy storage. The energy storage device includes a frame and one or more battery clusters. A placing space is arranged on the frame, and a battery cluster can pass through an inlet of the placing space. A bearing surface is arranged in the placing space and is used for bearing a battery cluster; the battery cluster includes a sliding portion and a plurality of battery packs. The plurality of battery packs are stacked in a gapless manner, and the sliding part can bear the weight of the plurality of battery packs and can slide on the bearing surface, so that the battery cluster is placed in place in the placing space through sliding. According to the energy storage device, the space utilization rate of the energy storage device can be improved, and meanwhile the energy storage device is convenient to assemble.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of energy storage, and specifically to an energy storage device. Background Art

[0002] As an important part of the new energy system, energy storage devices have been increasingly widely used in actual production activities. With the continuous improvement of the energy density of energy storage devices, the structural rationality of energy storage devices has also received more and more attention.

[0003] An existing energy storage device generally includes a frame and a plurality of battery packs. A plurality of support plates and columns are provided on the frame. The plurality of support plates and columns divide the energy storage device into a plurality of placement spaces. Each battery pack is placed in a different placement space.

[0004] However, the existing energy storage device requires each battery pack to be installed separately step by step, and the placement space is relatively small, which makes it inconvenient to install the battery pack, time-consuming and labor-intensive. At the same time, there are large gaps between the battery packs, and the space utilization rate is low. Therefore, how to improve the space utilization rate of the energy storage device while making it easier to assemble has become a technical problem to be solved. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides an energy storage device, in which the entrance of the placement space in the energy storage device is for the battery cluster to pass through, and the sliding part provided on the battery cluster can slide on the bearing surface. When assembling the energy storage device, it is only necessary to install the battery cluster externally and then push it into the placement space to place it in place. There is no need to place individual battery packs one by one, which saves time and effort. In addition, the multiple battery packs of the battery cluster are stacked without gaps, with high space utilization and integration, which can improve the space utilization of the energy storage device while making it easier to assemble.

[0006] In one aspect of an embodiment of the present application, there is provided an energy storage device, which includes a frame and one or more battery clusters. A placement space is provided on the frame, and an entrance of the placement space is provided for the battery cluster to pass through. A bearing surface is provided in the placement space, and the bearing surface is used to bear the battery cluster. The battery cluster includes a sliding portion and a plurality of battery packs, and the plurality of battery packs are stacked without gaps. The sliding portion can bear the weight of the plurality of battery packs and can slide on the bearing surface, so that the battery cluster can be placed in place in the placement space by sliding.

[0007] The assembly process of the energy storage device is simple. There is no need to place individual battery packs one by one, and the assembly of multiple battery clusters and the preparation of the frame can be carried out simultaneously, which reduces the assembly time and improves the assembly efficiency. In addition, the battery cluster is assembled outside the placement space, without the constraints of the operating space, and it is more convenient for operators to assemble. At the same time, multiple battery packs in the battery cluster are stacked without gaps, and there are no excessive gaps between multiple battery packs in the same battery cluster, and different battery clusters can also be spaced smaller, making the energy storage device structure more compact, with higher space utilization and integration.

[0008] In an optional manner, a guide rail is provided on the bearing surface, and the sliding part is slidably matched with the guide rail, so that the battery cluster slides along the guide rail in the placement space through the sliding part.

[0009] In this method, the guide rail provides guidance and support for the sliding of the sliding part, so that the battery cluster can slide in a stable posture in the placement space, and its stability is better. In addition, the sliding cooperation between the guide rail and the sliding part makes the battery cluster encounter less resistance when sliding, and the battery cluster can be easily slid along the guide rail to the specified position, which reduces the difficulty of placing the battery cluster and improves the efficiency of installing and replacing the battery cluster.

[0010] In an optional manner, the energy storage device further includes a plurality of fixing members. Each battery cluster placed in place is connected to the frame via at least one fixing member, and every two adjacent battery clusters placed in place are connected to each other via at least one fixing member.

[0011] In this method, multiple battery clusters can be fixed in the placement space only by using multiple fixings. It has a simple structure and is easy to install. It can reliably fix the battery clusters in the specified placement position without too many, which is conducive to the compact design of the energy storage device.

[0012] In an optional manner, in every two adjacent battery clusters placed in place, multiple battery packs in one battery cluster are opposite to multiple battery packs in another battery cluster, and the two opposite battery packs are connected to each other by at least one fixing member.

[0013] In this manner, the fixing member can fix each battery cluster as a whole or each battery pack, so that all battery packs in the battery cluster can be fully fixed, thereby improving the fixation reliability of the battery pack.

[0014] In an optional manner, each battery pack is provided with a load-bearing sleeve, which includes an inserting portion and a sleeve portion, and the inserting portion on one load-bearing sleeve can be nested in the sleeve portion of another load-bearing sleeve, so that each battery pack can be stacked without gaps by mutually nesting the load-bearing sleeves.

[0015] This method realizes gapless stacking of multiple battery packs by nesting the load-bearing sleeves on each battery pack. It has a simple structure, stable connection, and is easy to assemble and maintain. In addition, the load-bearing sleeve can transfer the weight of the battery pack, avoiding deformation of other parts of the battery pack under load, which is conducive to controlling the center of gravity of the battery cluster.

[0016] In an optional manner, an abutment platform is provided on the load-bearing sleeve, and the abutment platform on one load-bearing sleeve can abut against the engaging portion or sleeve portion of another load-bearing sleeve.

[0017] In this manner, the abutment platform can abut against the interlocking portion or the sleeve portion, thereby improving the load-bearing effect of the load-bearing sleeve, so that the weight of each battery pack can be transmitted layer by layer through the load-bearing sleeve of each battery pack, ensuring the reliability of force transmission, so as to further control the center of the stacked multiple battery packs and avoid the stacked multiple battery packs from tipping over.

[0018] In an optional manner, the battery cluster further includes a base, and the multiple battery packs are stacked up and down, and the bearing sleeve of the battery pack at the bottom of the multiple battery packs is nested on the base, so that the multiple battery packs are stacked on the base. The sliding part is arranged on the base, and the sliding part is located on the extension path where the bearing sleeves of the multiple battery packs are nested with each other, so that the weight of each battery pack is transferred to the sliding part through the bearing sleeve.

[0019] In this method, the sliding part is located exactly on the line of action of the load-bearing sleeve transmitting gravity, which can avoid excessive torque when transmitting gravity, so that the sliding part can reliably support multiple battery packs, ensure the stability of the center of gravity of the battery cluster, and make the stacked battery packs not easy to tip over.

[0020] In an optional manner, the battery cluster further includes a fixing frame, a plurality of load-bearing sleeves are distributed on the periphery of the battery pack, and a plurality of load-bearing sleeves of a topmost battery pack among the plurality of battery packs are nested on the fixing frame.

[0021] In this manner, the fixing frame can impose further freedom restrictions between multiple load-bearing sleeves of the same battery pack, making the connection of each battery pack more reliable.

[0022] In an optional manner, the battery cluster includes a plurality of sealing pads, and a sealing pad is provided at the junction of every two adjacent battery packs to seal the internal space of each battery pack.

[0023] In this manner, the sealing gasket seals the internal space of the battery pack at the junction of two adjacent battery packs. The overall structure is simple and occupies a small space. It can ensure the sealing effect of the internal space of the battery pack while making the battery pack easy to maintain.

[0024] In an optional manner, in every two adjacent battery packs, a sealing boss is provided on one battery pack, and a sealing groove is provided on the other battery pack, and the sealing gasket is pressed into the sealing groove by the sealing boss.

[0025] In this manner, the matching structure of the sealing boss, the sealing gasket and the sealing groove can further enhance the sealing effect, and the structure is simple and easy to align and install.

[0026] In the energy storage device provided in the embodiment of the present application, the entrance of the placement space provided on the frame is provided for the battery cluster to pass through, and the sliding part provided on the battery cluster can slide on the bearing surface. When assembling the energy storage device, it is only necessary to install the battery cluster outside, and then push it into the placement space to place it in place, so that multiple battery packs can be placed in place at the same time, without the need to place each battery pack one by one, and the assembly of multiple battery clusters and the preparation of the frame can be carried out at the same time, which reduces the assembly time and improves the assembly efficiency. In addition, the battery cluster is assembled outside the placement space without the restriction of the operating space, which makes it more convenient for the operator to assemble, and the overall assembly process is more time-saving and labor-saving. At the same time, the multiple battery packs of the battery cluster are stacked without gaps, the overall structure is more compact, and the space utilization and integration are higher, which can improve the space utilization of the energy storage device while making it easier to assemble.

[0027] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the overall structure of an energy storage device provided in an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the structure of the energy storage device involved in the embodiment of the present application when part of the battery cluster is hidden.

[0031] Figure 3 Schematic diagram of the overall structure of a battery cluster of an energy storage device according to an embodiment of the present application.

[0032] Figure 4 It is a schematic diagram of the partial structure of the energy storage device involved in the embodiment of the present application.

[0033] Figure 5 It is a schematic diagram of the structure when the battery packs in the battery cluster of the energy storage device involved in the embodiment of the present application are not completely stacked together.

[0034] Figure 6 It is a schematic diagram of the overall structure of the battery pack of the energy storage device involved in the embodiment of the present application at a first viewing angle.

[0035] Figure 7 It is a schematic diagram of the partial structure of the battery pack of the energy storage device involved in the embodiment of the present application at a second viewing angle.

[0036] Figure 8 It is a schematic diagram of the local structure of the energy storage device involved in the embodiment of the present application when the battery pack is covered with an insulating film at a first viewing angle.

[0037] Reference numerals:

[0038] 10. Frame; 11. Load-bearing surface; 12. Guide rail;

[0039] 20. Battery cluster; 21. Sliding portion; 22. Battery pack; 221. Load-bearing sleeve; 222. Fitting portion; 223. Sleeve portion; 224. Abutment platform; 23. Base; 24. Fixing frame;

[0040] 30. Fixing member; 41. Sealing gasket; 42. Sealing boss; 43. Sealing groove. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the energy storage device of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present application.

[0047] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the energy storage device of this embodiment are not absolute but relative, and although these indications are appropriate when the components of the energy storage device are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0048] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0049] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0050] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure can refer to a physical connection. For example, the physical connection can be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection can also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection can also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure can refer to not only a physical connection, but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it can also be the internal connection of two elements; in addition to signal connection through a circuit, a signal connection can also refer to signal connection through a media medium, such as a radio wave. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The energy storage device provided in the embodiment of the present application is as follows Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 This is a schematic diagram of the overall structure of an energy storage device provided in an embodiment of the present application. Figure 2 Schematic diagram of the structure of the energy storage device according to the embodiment of the present application when part of the battery cluster is hidden. Figure 3 The overall structure diagram of the battery cluster of the energy storage device involved in the embodiment of the present application is shown in FIG.

[0052] The frame 10 is a prefabricated frame structure that provides support for the battery cluster 20. The frame 10 can be specifically assembled from a plurality of support plates, support beams and other structures by bolt connection, welding and other methods. Figure 1 and Figure 2 As shown, a placement space for placing the battery cluster 20 is provided on the frame 10 , and the size and shape of the space match the size and shape of the battery cluster 20 , so that the placement space can just accommodate one or more battery clusters 20 .

[0053] The placement space has an entrance, and the entrance of the placement space allows the battery cluster 20 to pass through, so as to facilitate the placement of the battery cluster 20. In this embodiment, the entrance of the placement space can be an opening specially reserved for the battery cluster 20, or any opening on the frame 10 that allows the battery cluster 20 to enter the placement space, which is not limited here.

[0054] like Figure 1 and Figure 2As shown, the placement space has a bearing surface 11, and the bearing surface 11 is used to bear the battery cluster 20. The bearing surface 11 can be the bottom surface of the placement space, or can be other specially provided bearing surfaces 11, such as specially provided boss surfaces, etc. The bearing surface 11 has sufficient strength to bear the total weight of multiple battery clusters 20 without excessive deformation.

[0055] The battery cluster 20 is an energy storage component that can be assembled outside the placement space. The battery cluster 20 includes a sliding portion 21 and a plurality of battery packs 22. Among them, the battery pack 22 is an energy storage component with a plurality of battery cells arranged inside. Thermal control structures such as a liquid cooling plate, a liquid cooling outlet, and a liquid cooling inlet may also be arranged on the battery pack 22. Among them, the liquid cooling bottom plate may form the bottom plate of the battery pack 22 to cool or heat the battery pack 22, and the liquid cooling outlet and the liquid cooling inlet are used to supply and drain liquid to the inside of the liquid cooling plate. In addition, an explosion-proof valve may be arranged on the battery pack 22 to quickly relieve pressure in the battery pack 22 when the battery pack 22 is in thermal runaway. A smoke exhaust channel may also be arranged on the battery pack 22 to discharge smoke generated by thermal runaway. In addition, a lifting bracket may be arranged on the battery pack 22 to facilitate the lifting of structures such as the battery pack 22 during assembly.

[0056] like Figure 3 As shown, multiple battery packs 22 in the battery cluster 20 are stacked without gaps, specifically, they can be stacked up and down without gaps in the vertical direction, so that the weight of the battery pack 22 is transmitted through the battery pack 22 itself, and at the same time, the structure of the battery cluster 20 is more compact, the energy storage density is maximized, the occupied space is reduced, and the space utilization and integration are improved. Among them, the gapless stacking means that there is no excessive useless gap between two adjacent battery packs 22, so that the battery packs 22 are stacked in a contacting manner.

[0057] The sliding part 21 is a component used to drive the battery cluster 20 to slide. The sliding part 21 can bear the weight of multiple battery packs 22 and can slide on the bearing surface 11 to place the battery cluster 20 in the placement space by sliding.

[0058] The sliding part 21 has sufficient strength and rigidity to bear the weight of the stacked battery packs 22 and ensure smooth sliding of the battery cluster 20. The sliding part 21 has many structural forms. For example, the sliding part 21 can be set as a pulley structure or a slider structure, which is not limited here.

[0059] There are many ways to set the position of the sliding part 21. For example, the sliding part 21 can be set at the bottom of the battery cluster 20 to facilitate assembly. Of course, the sliding part 21 can also be set at other positions. In this case, sufficient avoidance space should be set in the placement space so that the battery cluster 20 can slide to the placement position without obstruction.

[0060] When assembling this type of energy storage device, first prefabricate the frame 10 and assemble the battery cluster 20 outside the placement space, then install the battery cluster 20 into the placement space through the sliding part 21 of the battery cluster 20, and then push the battery cluster 20 to place it in place, and the placement of the battery cluster 20 can be completed. The assembly process of this type of energy storage device is simple, and there is no need to place a single battery pack 22 one by one, and the assembly of multiple battery clusters 20 and the preparation of the frame 10 can be carried out at the same time, which reduces the assembly time and improves the assembly efficiency. In addition, the battery cluster 20 is assembled outside the placement space, without the restriction of the operating space, and it is more convenient for the operator to assemble. At the same time, the multiple battery packs 22 in the battery cluster 20 are stacked without gaps, and the gravity of the battery pack 22 is transmitted by the structure of the battery pack 22 itself. There is no need to set up extra columns or support plates. There is no excessive gap between the multiple battery packs 22 of the same battery cluster 20, and the intervals between different battery clusters 20 can also be small, so that the energy storage device structure is more compact, and the space utilization and integration are higher.

[0061] In this embodiment, in order to facilitate the battery cluster 20 placed on the carrying surface 11 to slide smoothly into place, a structure for guiding the sliding may be provided on the carrying surface 11 , such as a slope or a guide rail 12 .

[0062] For example, an optional method is as follows Figure 2 As shown, a guide rail 12 is disposed on the bearing surface 11 . The sliding portion 21 is slidably matched with the guide rail 12 , so that the battery cluster 20 slides along the guide rail 12 in the placement space through the sliding portion 21 .

[0063] In this embodiment, the guide rail 12 can be a separate part installed on the bearing surface 11, or a partial structure processed on the bearing surface 11 and having the function of the guide rail 12. The structures of the guide rail 12 and the sliding part 21 match, so that the sliding part 21 can slide under the guidance of the guide rail 12.

[0064] In a specific implementation, the guide rail 12 can be set as a slide groove, and the sliding part 21 can be set as a slider. When placing the battery cluster 20, the slider of the battery cluster 20 is placed in the slide groove, and then the battery cluster 20 is pushed to slide along the slide groove, so that the battery cluster 20 is pushed to the placement position, that is, the battery cluster 20 is placed in place.

[0065] In this manner, the guide rail 12 provides guidance and support for the sliding of the sliding part 21, so that the battery cluster 20 can slide in a stable posture in the placement space, and its stability is better. In addition, the sliding cooperation between the guide rail 12 and the sliding part 21 makes the resistance encountered by the battery cluster 20 when sliding small, and the battery cluster 20 can be easily slid to the specified position along the guide rail 12, which reduces the difficulty of placing the battery cluster 20 and improves the installation and replacement efficiency of the battery cluster 20.

[0066] In this embodiment, after the multiple battery clusters 20 are placed in place, they need to be fixed so that the battery clusters 20 are stably placed in the placement space. Figure 4 As shown, Figure 4 Schematic diagram of the partial structure of the energy storage device involved in the embodiment of the present application. The energy storage device further includes a plurality of fixings 30. Each battery cluster 20 placed in place is connected to the frame 10 by at least one fixing 30, and every two adjacent battery clusters 20 placed in place are connected to each other by at least one fixing 30.

[0067] The fixing member 30 is a component used to fix the battery cluster 20 in the placement space. The fixing member 30 can be specifically composed of components such as bolts, nuts, buckles, pins, and fixing plates. It is only necessary that the fixing member 30 can fix the battery cluster 20 and other components, and there is no limitation here. Moreover, different fixing members can be set to the same or different structural forms according to needs.

[0068] Each battery cluster 20 in the multiple battery clusters 20 needs to be connected to the frame 10 via the fixings 30. At the same time, adjacent battery clusters 20 are also connected to each other via the fixings 30, so that the multiple battery clusters 20 placed in place are connected into a whole through the multiple fixings 30, so that the freedom of each battery cluster 20 placed in place can be fully restricted, thereby ensuring the fixing effect of each battery cluster 20.

[0069] In this method, multiple battery clusters 20 can be fixed in the placement space only by using multiple fixing members 30. The structure is simple and the installation is convenient. The battery clusters 20 can be reliably fixed in the specified placement position without too many, which is conducive to the compact design of the energy storage device.

[0070] In this embodiment, when two adjacent battery clusters 20 are connected by the fixing member 30, in order to further improve the fixing effect of a single battery pack 22, each battery pack 22 may be fixed by multiple fixing members 30. For example, an optional method is as follows: Figure 4 As shown, in every two adjacent battery clusters 20 placed in place, the multiple battery packs 22 in one battery cluster 20 are opposite to the multiple battery packs 22 in another battery cluster 20 , and the two opposite battery packs 22 are connected to each other by at least one fixing member 30 .

[0071] The number of battery packs 22 in each battery cluster 20 is equal. When each battery cluster 20 is placed in place, the battery packs 22 between each two adjacent battery clusters 20 are in a one-to-one relative position relationship, and the two relative battery packs 22 are connected to each other by at least one fixing member 30, so that each battery pack 22 is subject to sufficient freedom restrictions, thereby improving the fixing effect of the battery pack 22. In addition, the structural forms of each fixing member 30 can be the same or different, which is not limited here.

[0072] In this manner, the fixing member 30 can fix each battery cluster 20 as a whole, or can fix each battery pack 22 , so that all battery packs 22 in the battery cluster 20 can be fully fixed, thereby improving the fixation reliability of the battery pack 22 .

[0073] In this embodiment, in order to facilitate reliable connection of multiple battery packs 22 in the battery cluster 20 to form a gap-free stacked structure, a dockable connection structure can be provided on the battery pack 22. When stacking multiple battery packs 22, it is only necessary to dock the connection structures on different battery packs 22. There are many structural forms of the connection structure, such as the connection structure can be set as a structure that can be mutually clamped, or can be set as a structure that can be threaded, etc.

[0074] An alternative method is Figure 5 , Figure 6 and Figure 7 As shown, Figure 5 is a schematic diagram of the structure of a battery cluster of an energy storage device according to an embodiment of the present application when the battery packs are not completely stacked together. Figure 6 is a schematic diagram of the overall structure of a battery pack of an energy storage device according to an embodiment of the present application at a first viewing angle, Figure 7 The schematic diagram of the partial structure of the battery pack of the energy storage device involved in the embodiment of the present application at a second viewing angle. Among them, each battery pack 22 is provided with a load-bearing sleeve 221. The load-bearing sleeve 221 includes a chimeric portion 222 and a sleeve portion 223. The chimeric portion 222 on one load-bearing sleeve 221 can be nested in the sleeve portion 223 of another load-bearing sleeve 221, so that each battery pack 22 is stacked without gaps through the mutual nesting of each load-bearing sleeve 221.

[0075] The load-bearing sleeve 221 is a connector for connecting different battery packs 22. There can be one or more load-bearing sleeves 221 on the same battery pack 22. The load-bearing sleeve 221 includes at least two parts, a fitting portion 222 and a sleeve portion 223. The load-bearing sleeves 221 on different battery packs 22 can fit together, specifically, the fitting portion 222 of one fitting sleeve is nested with the sleeve portion 223 of another fitting sleeve.

[0076] There are many ways to set the structure of the embedded part 222 and the sleeve part 223. For example, the embedded part 222 can be set as an embedded structure such as a conical boss, a wedge-shaped boss or a cylindrical boss, and the sleeve part 223 is provided with a conical hole, a wedge-shaped hole or a cylindrical hole corresponding to the embedded part 222, which can cover the embedded part 222. In addition, when the embedded part 222 is embedded in the sleeve part 223, it can be a clearance fit.

[0077] The load-bearing sleeve 221 can be manufactured by casting, forging or machining, and the size and material of the load-bearing sleeve 221 can be reasonably set according to the weight and stacking requirements of the battery pack 22, so that the battery pack 22 can be connected with other battery packs 22 through the load-bearing sleeve 221 to form a gap-free stack, and the load-bearing sleeve 221 can bear and transfer the weight of the battery pack 22, thereby avoiding stress-bearing deformation of other parts of the battery pack 22.

[0078] This method realizes gapless stacking of multiple battery packs 22 by mutually nesting the load-bearing sleeves 221 on each battery pack 22. It has a simple structure, stable connection, and is easy to assemble and maintain. In addition, the load-bearing sleeve 221 can transfer the weight of the battery pack 22, avoiding deformation of other parts of the battery pack 22 under load, which is conducive to controlling the center of gravity position of the battery cluster 20.

[0079] Furthermore, an alternative method is Figure 6 and Figure 7 As shown, an abutment platform 224 may be further provided on the load-bearing sleeve 221 , and the abutment platform 224 on one load-bearing sleeve 221 may abut against the fitting portion 222 or the sleeve portion 223 of another load-bearing sleeve 221 .

[0080] In this manner, the abutment platform 224 can abut against the interlocking portion 222 or the sleeve portion 223, thereby improving the load-bearing effect of the load-bearing sleeve 221, so that the weight of each battery pack 22 can be transmitted layer by layer through the load-bearing sleeve 221 of each battery pack 22, thereby ensuring the reliability of force transmission, so as to further control the center of the stacked multiple battery packs 22 and prevent the stacked multiple battery packs 22 from tipping over.

[0081] In addition, if Figure 3 and Figure 5 As shown, the battery cluster 20 may further include a base 23, a plurality of battery packs 22 are stacked up and down, and a bearing sleeve 221 of the bottommost battery pack 22 among the plurality of battery packs 22 is nested on the base 23, so that the plurality of battery packs 22 are stacked on the base 23. The sliding portion 21 is disposed on the base 23, and the sliding portion 21 is located on an extension path where the bearing sleeves 221 of the plurality of battery packs 22 are nested with each other, so that the weight of each battery pack 22 is transferred to the sliding portion 21 through the bearing sleeve 221.

[0082] The base 23 is a frame structure for holding multiple battery packs 22. In order to facilitate the multiple battery packs 22 to be reliably placed on the base 23, a connection structure of an engaging portion 222 or a sleeve portion 223 similar to the bearing sleeve 221 can be provided on the base 23, so that the battery pack 22 at the bottom is nested on the base 23 through the bearing sleeve. Of course, other connectors can also be used to connect multiple battery packs 22 to the base 23, which is not limited here.

[0083] The sliding part 21 is disposed on the base 23 and can be located at the bottom of the base 23. In addition, the sliding part 21 is located on the extension path where the bearing sleeves 221 of the multiple battery packs 22 are mutually nested, so that the sliding part 21 is just located on the line of action of the bearing sleeves 221 transmitting gravity, which can avoid excessive torque generation when transmitting gravity, so that the sliding part 21 can reliably support the multiple battery packs 22, ensure the stability of the center of gravity of the battery cluster 20, and make the stacked multiple battery packs 22 not easy to tip over.

[0084] In this embodiment, in order to stabilize the position of the battery packs 22 after being stacked, multiple bearing sleeves 221 can be provided on the battery packs 22, so as to fix the battery packs 22 at multiple positions. In addition, since multiple battery packs 22 are stacked, in order to make the battery packs 22 more securely connected, an optional method can be as follows Figure 3 and Figure 5 As shown, the battery cluster 20 may further include a fixing frame 24 , and a plurality of load-bearing sleeves 221 are distributed on the periphery of the battery packs 22 , and the plurality of load-bearing sleeves 221 of the topmost battery pack 22 among the plurality of battery packs 22 are nested on the fixing frame 24 .

[0085] In this manner, a plurality of connection structures corresponding to the interlocking portions 222 or the sleeve portions 223 similar to the load-bearing sleeves 221 are provided on the fixing frame 24, so that the fixing frame 24 and the plurality of load-bearing sleeves 221 of the topmost battery pack 22 among the plurality of battery packs 22 are nested, thereby imposing further freedom restrictions between the plurality of load-bearing sleeves 221 of the same battery pack 22, making the connection of each battery pack 22 more reliable.

[0086] In addition, when the battery cluster 20 is fixed by the fixing member 30 , the fixing member 30 may be disposed in the overlapping area where the sleeve and the sleeve are assembled, so that the stacked adjacent battery packs 22 are further limited by the fixing member 30 , thereby further ensuring the fixing effect of the battery packs 22 .

[0087] Components such as a power distribution device may also be provided on the battery cluster 20, and these components may be reasonably arranged around the stacked battery packs 22, such as being provided on the base 23 to lower the center of gravity of the battery cluster 20, which will not be elaborated herein.

[0088] In addition, in this embodiment, the battery packs 22 in the battery cluster 20 may be fully enclosed battery packs 22 or semi-enclosed battery packs 22. In order to ensure the sealing of the internal space of each battery pack 22, for the semi-enclosed battery pack 22, the internal space of the battery pack 22 may be sealed by a sealing gasket 41 to ensure the safety of each battery pack 22.

[0089] Exemplarily, in an optional manner, the battery cluster 20 includes a plurality of sealing gaskets 41 , and a sealing gasket 41 is disposed at the joint between each two adjacent battery packs 22 to seal the internal space of each battery pack 22 .

[0090] In this manner, the sealing gasket 41 seals the internal space of the battery pack 22 at the junction of two adjacent battery packs 22. The overall structure is simple and occupies a small space. It can ensure the sealing effect of the internal space of the battery pack 22 while making the battery pack 22 easy to maintain.

[0091] A specific installation method of the sealing gasket 41 can be as follows Figure 6 , Figure 7 and Figure 8 As shown, Figure 8 The schematic diagram of the partial structure of the energy storage device in the embodiment of the present application when the battery pack is covered with an insulating film at a first viewing angle. Among them, one battery pack 22 of each adjacent two battery packs 22 is provided with a sealing boss 42, and the other battery pack 22 is provided with a sealing groove 43, and the sealing gasket 41 is pressed into the sealing groove 43 by the sealing boss 42.

[0092] Taking two battery packs 22 stacked up and down as an example, a sealing groove 43 may be provided on the bottom surface of the upper battery pack 22, such as the sealing groove being provided on the lower surface of the liquid cooling plate at the bottom of the battery pack 22. A sealing boss 42 is provided on the top surface of the lower battery pack 22. When stacking the battery packs 22, it is only necessary to make the sealing boss 42 and the sealing groove 43 face each other and place the sealing gasket 41 between the sealing boss 42 and the sealing groove 43 for stacking.

[0093] In this manner, the matching structure of the sealing boss 42, the sealing gasket 41 and the sealing groove 43 can further enhance the sealing effect, and the structure is simple and easy to align and install.

[0094] In addition, in the energy storage device provided in this embodiment, in addition to the battery cluster 20 and the frame 10, other components may be provided. For example, a coolant circulation pipeline, a liquid cooling unit, various control valves, and thermal insulation sleeves and other thermal management components may be provided. Power distribution components may also be provided, such as high-voltage wiring harnesses, high-voltage boxes, power distribution cabinets, and converters and other high-voltage electrical components, as well as communication wiring harnesses, control modules and other low-voltage electrical components for communication signal transmission. Smoke sensors, alarms, and fire sprinkler equipment that can detect and prevent thermal runaway may also be provided, which will not be described in detail here.

[0095] In summary, in the energy storage device described above, the entrance of the placement space provided on the frame is provided for the battery cluster to pass through, and the sliding portion provided on the battery cluster can slide on the bearing surface. When assembling the energy storage device, it is only necessary to install the battery cluster outside, and then push it into the placement space to place it in place, so that multiple battery packs can be placed in place at the same time, without the need to place each battery pack one by one, and the assembly of multiple battery clusters and the preparation of the frame can be carried out at the same time, which reduces the assembly time and improves the assembly efficiency. In addition, the battery cluster is assembled outside the placement space without the constraints of the operating space, which makes it more convenient for the operator to assemble, and the overall assembly process is more time-saving and labor-saving. At the same time, the multiple battery packs of the battery cluster are stacked without gaps, the overall structure is more compact, and the space utilization and integration are higher, which can improve the space utilization of the energy storage device while making it easier to assemble.

[0096] Those skilled in the art will appreciate that, although some embodiments herein do not include certain features included in other embodiments, the combination of features of different embodiments is still within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0097] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises: a frame and one or more battery clusters; The frame is provided with a placement space, the entrance of which is for the battery cluster to pass through; the placement space has a bearing surface, which is used to bear the battery cluster; The battery cluster includes a sliding portion and a plurality of battery packs; the plurality of battery packs are stacked without gaps, and the sliding portion can bear the weight of the plurality of battery packs and can slide on the bearing surface, so that the battery cluster can be placed in place in the placement space by sliding.

2. The energy storage device according to claim 1, characterized in that: A guide rail is arranged on the bearing surface; the sliding part is slidably matched with the guide rail, so that the battery cluster slides along the guide rail in the placement space through the sliding part.

3. The energy storage device according to claim 1 or 2, characterized in that: The energy storage device also includes a plurality of fixing members; Each of the battery clusters placed in place is connected to the frame via at least one of the fixing members, and every two adjacent battery clusters placed in place are connected to each other via at least one of the fixing members.

4. The energy storage device according to claim 3, characterized in that: In every two adjacent battery clusters placed in place, the multiple battery packs in one battery cluster are opposite to the multiple battery packs in another battery cluster, and the two opposite battery packs are connected to each other through at least one of the fixing members.

5. The energy storage device according to claim 1, characterized in that: Each of the battery packs is provided with a load-bearing sleeve; The load-bearing sleeve includes an embedded portion and a sleeve portion; the embedded portion on one load-bearing sleeve can be nested in the sleeve portion of another load-bearing sleeve, so that the battery packs can be stacked without gaps through the mutual nesting of the load-bearing sleeves.

6. The energy storage device according to claim 5, characterized in that: The load-bearing sleeve is provided with an abutment platform; The abutment platform on one of the load-bearing sleeves can abut against the fitting portion or the sleeve portion of another load-bearing sleeve.

7. The energy storage device according to claim 5 or 6, characterized in that: The battery cluster also includes a base; A plurality of the battery packs are stacked up and down, and the load-bearing sleeve of the battery pack at the bottom of the plurality of battery packs is nested on the base, so that the plurality of battery packs are stacked on the base; The sliding part is arranged on the base, and the sliding part is located on an extension path where the load-bearing sleeves of a plurality of the battery packs are mutually nested, so that the weight of each battery pack is transferred to the sliding part through the load-bearing sleeves.

8. The energy storage device according to claim 7, characterized in that: The battery cluster also includes a fixing frame; A plurality of the load-bearing sleeves are distributed on the periphery of the battery pack, and a plurality of the load-bearing sleeves of the topmost battery pack among the plurality of battery packs are nested on the fixing frame.

9. The energy storage device according to claim 1, characterized in that: The battery cluster includes a plurality of sealing gaskets; The sealing pad is arranged at the joint of each two adjacent battery packs to seal the internal space of each battery pack.

10. The energy storage device according to claim 9, characterized in that: In every two adjacent battery packs, a sealing boss is provided on one battery pack, and a sealing groove is provided on the other battery pack, and the sealing gasket is pressed into the sealing groove by the sealing boss.

Images