Battery rack, battery cluster and battery energy storage system

Abstract

The application discloses a battery rack, a battery cluster and a battery energy storage system, and belongs to the technical field of energy storage. The battery rack comprises two groups of vertical racks and two mounting racks. Each mounting rack comprises a bottom plate and a side plate. The bottom plate and the side plate extend along a second direction. The side plate is connected to the upper side of the bottom plate. In a first direction, the two side plates are respectively connected to the ends of the two bottom plates away from each other. Each side plate is further provided with a protrusion facing the other side plate. The two mounting racks are located between the two groups of vertical racks, and the two side plates are respectively fixed to the two groups of vertical racks. The two bottom plates are used for jointly bearing a battery module, so that the battery module is limited between the two protrusions and can slide along the second direction. By arranging the protrusion, the contact between the battery module and the side plate changes from large-area contact to local contact. While reliable limiting in the first direction is realized to prevent deviation, the contact resistance in the pushing process is reduced, the battery module can be smoothly installed along the second direction, and the assembly efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery rack, battery cluster and battery energy storage system. Background Technology

[0002] With the rapid development of new energy technologies, battery energy storage systems are increasingly widely used in areas such as power peak shaving, renewable energy grid connection, and backup power. As the core unit of battery energy storage systems, battery modules are typically fixed and integrated using battery racks to form stable and easy-to-maintain battery clusters.

[0003] Currently, most common battery racks adopt a frame structure to support and position battery modules. In actual assembly, battery modules are usually pushed into the battery rack in a predetermined direction to complete the installation. However, with this installation method, battery modules are prone to problems such as difficulty in pushing them in, installation misalignment, or jamming, resulting in low assembly efficiency. Utility Model Content

[0004] This application provides a battery rack, battery cluster, and battery energy storage system to improve assembly efficiency and at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a battery holder for carrying a battery module is provided, comprising: Both sets of uprights extend vertically, and the two sets of uprights are spaced apart in the first direction; Two mounting brackets are spaced apart in a first direction. Each mounting bracket includes a base plate and a side plate. The base plate and the side plate extend along a second direction, which intersects with the first direction. The side plate is connected to the upper side of the base plate. In the first direction, the two side plates are respectively connected to the ends of the two base plates that are far apart from each other. Each side plate also has a protrusion facing the other side plate. The two mounting brackets are located between the two sets of uprights, and the two side plates are respectively fixed to the two sets of uprights. The two base plates are used to jointly support the battery module, so that the battery module is restricted between the two protrusions and can slide along the second direction.

[0006] Optionally, the battery rack further includes threaded fasteners and rivet nuts, the rivet nuts being embedded in the upright, the side plate having a connecting hole, and the threaded fasteners passing through the connecting hole and the rivet nuts to fix the side plate to the upright.

[0007] Optionally, the side plate has a recess on the side opposite to the other side plate, and the connecting hole is located in the recess. The recess provides clearance space for the rivet nut so that the side plate fits snugly against the stand.

[0008] Optionally, in the first direction, the recess and the convex are opposite to each other; The connecting hole includes a countersunk hole, which includes a straight section and a tapered section. The threaded fastener includes a shank and a head, with the shank passing through the straight section and the head located within the tapered section.

[0009] Optionally, the battery holder further includes a first insulating sheet disposed on the side of the protrusion facing the other protrusion.

[0010] Optionally, the first insulating sheet is bonded to the protrusion; The first insulating sheet has a through hole, which is opposite to the countersunk hole, so that the head is exposed.

[0011] Optionally, the battery rack further includes a second insulating sheet disposed on the upper side of the base plate for contacting the lower side of the battery module.

[0012] Optionally, the mounting bracket is a one-piece molded sheet metal part.

[0013] According to a second aspect of this application, a battery cluster is provided, including the battery holder as described above and a battery module.

[0014] According to a third aspect of this application, a battery energy storage system is also provided, including the battery clusters described above.

[0015] In the battery rack of this embodiment, two mounting brackets are arranged opposite to each other and fixed between two sets of uprights by their respective side plates, together defining a mounting groove for accommodating the battery module. This mounting groove has two side plates as side walls and two bottom plates forming a bottom wall, providing installation space for the battery module. Each side plate has a protrusion facing the other side plate, and the battery module is positioned between the two protrusions during installation. By providing the protrusions, the contact between the battery module and the side plates changes from large-area contact to localized contact, reliably limiting the position in the first direction to prevent displacement while reducing contact resistance during the pushing process, allowing the battery module to be smoothly installed in the second direction and improving assembly efficiency.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0018] Figure 1 This is a schematic diagram of the overall structure of the battery rack provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 A magnified view of part A in the diagram; Figure 3 yes Figure 1 An exploded diagram of the battery rack; Figure 4 yes Figure 3 A magnified view of part B in the diagram; Figure 5 yes Figure 1 A schematic diagram of the mounting bracket in the diagram; Figure 6 yes Figure 5 Another perspective structural diagram of the mounting bracket; Figure 7 This is a schematic diagram of the overall structure of the battery cluster provided in an exemplary embodiment of this disclosure.

[0019] Explanation of reference numerals in the attached figures: 1000, Battery cluster; 100, Battery rack; 101, Mounting slot; 1, Stand; 11, Column; 2, Mounting bracket; 21, Base plate; 22, Side plate; 221, Protrusion; 222, Recess; 223, Connecting hole; 2231, Straight hole section; 2232, Tapered hole section; 3, Threaded fastener; 31, Rod; 32, Head; 4, Rivet nut; 5, First insulating sheet; 51, Through hole; 6, Second insulating sheet; 200, Battery module. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0021] Please see Figures 1 to 4This application provides a battery rack 100 mainly used to support a battery module 200, including two sets of uprights 1 and two mounting brackets 2. Both sets of uprights 1 extend vertically and are spaced apart in a first direction. The two mounting brackets 2 are spaced apart in the first direction. Each mounting bracket 2 includes a base plate 21 and a side plate 22, both extending in a second direction intersecting the first direction. The side plate 22 is connected to the upper side of the base plate 21, and a bend is formed between the side plate 22 and the base plate 21 to form an L-shaped slot. In the first direction, two side plates 22 are respectively connected to the opposite ends of two base plates 21. Each side plate 22 also has a protrusion 221 facing the other side plate 22. Two mounting brackets 2 are located between two sets of uprights 1, and the two side plates 22 are respectively fixed to the two sets of uprights 1. The two base plates 21 jointly support the battery module 200, thus confining the battery module 200 between the two protrusions 221. The protrusions 221 provide a limiting function for the battery module 200 in the first direction of the mounting bracket 2 and allow it to slide in the second direction. Alternatively, since the mounting bracket 2 has an overall L-shaped bent structure, a near-right-angle bend is formed between the side plate 22 and the base plate 21, thus forming an L-shaped groove for guiding and limiting the battery module 200 during installation.

[0022] In this application's technical solution, two mounting brackets 2 are arranged opposite each other and fixed between two sets of uprights 1 by their respective side plates 22. Together, they define a mounting groove 101 for accommodating the battery module 200. The mounting groove 101 has two side plates 22 as side walls and two bottom plates 21 forming a bottom wall, providing installation space for the battery module 200. It should be noted that the side walls (which can be understood as side plates 22) and bottom walls (which can be understood as bottom plates 21) of the mounting groove 101 do not completely cover any side of the battery module 200, primarily to support the battery module 200. Each side plate 22 has a protrusion 221 facing the other side plate 22, and the battery module 200 is positioned between the two protrusions 221 during installation. By providing the protrusions 221, the contact between the battery module 200 and the side plate 22 changes from large-area contact to partial contact. This achieves reliable positioning in the first direction to prevent displacement while reducing contact resistance during the pushing process, allowing the battery module 200 to be smoothly installed in the second direction, improving assembly efficiency.

[0023] Please see Figures 1 to 4In some embodiments, the battery rack 100 further includes a threaded fastener 3 and a rivet nut 4 adapted to the threaded fastener 3. The rivet nut 4 is embedded in the upright 1. The side plate 22 has a connecting hole 223. The threaded fastener 3 passes through the connecting hole 223 and the rivet nut 4 to fix the side plate 22 to the upright 1. In these embodiments, a reliable connection between the side plate 22 and the upright 1 is achieved by setting the rivet nut 4 to cooperate with the threaded fastener 3 (bolt or screw). The rivet nut 4 is embedded in the upright 1, avoiding direct tapping on the thin-walled structure and preventing thread damage and metal shavings. At the same time, its radial locking structure can effectively improve the connection strength, especially suitable for operating environments with frequent vibration. This connection method supports multiple disassembly and assembly, facilitates installation, debugging and subsequent maintenance, and improves the serviceability and service life of the battery rack 100.

[0024] In some other embodiments, the side plate 22 and the upright 1 can also be fixed by means of welding, riveting, plugging or snap-fitting.

[0025] Please see Figure 1 In some embodiments, each frame 1 includes two columns 11 spaced apart in a second direction, and side plates 22 are connected to these two columns 11 respectively. Each side plate 22 has two protrusions 221 corresponding to the two columns 11, so that the battery module 200 is engaged with the four protrusions 221 during installation, and is restricted in the first direction to prevent displacement. This arrangement further improves the stability of the side plate 22 connection and enhances the reliability of the limiting position of the battery module 200.

[0026] Please see Figure 2 and Figure 6 In some embodiments, a recess 222 is provided on the side of the side plate 22 facing away from the other side plate 22, and a connecting hole 223 is provided in the recess 222. The recess 222 provides clearance space for the rivet nut 4, so that the side plate 22 fits snugly against the frame 1. In these embodiments, by providing a recess 222 on the side of the side plate 22 facing away from the other side plate 22 and providing a connecting hole 223 in the recess 222, the recess 222 provides clearance space for the rivet nut 4, preventing assembly interference at the rivet nut 4 location; the side plate 22 can fit tightly against the surface of the frame 1, eliminating connection gaps and improving connection stability and structural integrity. In the fitted state, the side plate 22 is subjected to uniform force, which helps to improve load-bearing capacity and vibration resistance.

[0027] Please see Figure 4 , Figure 5 and Figure 6In some embodiments, in the first direction, the recess 222 and the protrusion 221 are opposite each other; the connecting hole 223 includes a countersunk hole, which includes a straight hole section 2231 and a tapered hole section 2232; the threaded fastener 3 includes a shank 31 and a head 32, with the shank 31 passing through the straight hole section 2231 and the head 32 disposed within the tapered hole section 2232. In these embodiments, the recess 222 and the protrusion 221 are located on both sides of the side plate 22 and are opposite each other in the first direction, forming a locally reinforced three-dimensional structure, which helps to improve the structural rigidity and deformation resistance of the side plate 22. The countersunk hole allows the head 32 of the threaded fastener 3 to be accommodated within the tapered hole section 2232, without protruding from the surface of the side plate 22, thus avoiding scratching or interference during the insertion of the battery module 200. This design ensures the smoothness and continuity of the outer surface of the protrusion 221, ensuring smooth contact between the battery module 200 and the protrusion 221 when sliding along the second direction, achieving stable positioning and low-friction guidance.

[0028] In some other embodiments, the protrusion 221 and the recess 222 are formed on both sides of the side plate 22 and are offset in a first direction. This structure allows the protrusion 221 to be formed by local thickening and the recess 222 to be formed by local thinning.

[0029] Please see Figure 2 and Figure 4 In some embodiments, the battery rack 100 further includes a first insulating sheet 5, which is disposed on the side of the protrusion 221 facing another protrusion 221. In these embodiments, the first insulating sheet 5 is disposed on the side of the protrusion 221 facing the battery module 200, which can form electrical isolation between the battery module 200 and the protrusion 221, blocking the contact path between the battery module 200 and the battery rack 100 at that location, effectively avoiding the risk of short circuit or leakage caused by structural continuity, and improving the electrical safety of the battery energy storage system.

[0030] It is understandable that the protrusion 221 and the first insulating sheet 5, while fulfilling the functions of limiting and insulating, can also define a heat dissipation channel around the battery module 200. For example, when the height of the protrusion 221 in the first direction is 3 mm and the thickness of the first insulating sheet 5 is 3 mm, the two define a 6 mm gap space in the first direction between the battery module 200 and the side plate 22. This space serves as a heat dissipation channel around the battery module 200, which is conducive to air circulation and promotes heat dissipation.

[0031] In some embodiments, multiple sets of two mounting brackets 2 are provided on the upright frame 1 along the vertical direction for stacking multiple battery modules 200. By controlling the vertical spacing of adjacent mounting brackets 2, the vertical spacing between adjacent battery modules 200 can be adjusted. For example, setting the vertical spacing of adjacent battery modules 200 to 12 mm can form a ventilation channel between the battery modules 200, allowing air to flow smoothly in the battery stacking area, effectively removing the heat generated by the battery modules 200 during operation, and improving the thermal management capability of the battery system.

[0032] Please see Figure 2 and Figure 4 In some embodiments, the first insulating sheet 5 is bonded to the protrusion 221; the first insulating sheet 5 has a through hole 51, which is opposite to the countersunk hole, so that the head 32 is exposed. In these embodiments, the first insulating sheet 5 is fixed to the protrusion 221 by bonding, which is simple to install and can effectively prevent the insulating sheet from shifting or falling off during handling or assembly, thus improving assembly consistency. The first insulating sheet 5 has a through hole 51 corresponding to the countersunk hole, so that the head 32 of the threaded fastener 3 is exposed, allowing tools to be directly inserted for tightening or loosening. This design supports the pre-assembly of the mounting bracket 2 and the insulating sheet as a whole, and then connection with the upright 1, improving assembly efficiency; in later maintenance, the mounting bracket 2 can also be directly disassembled without peeling or reapplying the insulating sheet, which is convenient for maintenance and replacement.

[0033] Please see Figure 2 and Figure 4 In some embodiments, the battery rack 100 further includes a second insulating sheet 6, which is disposed on the upper side of the base plate 21 for contacting the lower side of the battery module 200. In these embodiments, the second insulating sheet 6 is disposed on the side of the base plate 21 facing the battery module 200, which can form electrical isolation between the battery module 200 and the base plate 21, blocking the contact path between the battery module 200 and the battery rack 100 at that location, effectively avoiding the risk of short circuits or leakage caused by structural continuity, and improving the electrical safety of the battery energy storage system.

[0034] In some embodiments, the second insulating sheet 6 and the first insulating sheet 5 are separately configured and installed independently. This design reduces the overall molding difficulty of the insulating components and also improves assembly flexibility and maintenance convenience. For example, during maintenance, if only the first insulating sheet 5 is worn, the side insulating sheet can be replaced separately without disassembling the second insulating sheet 6 on the base plate 21, reducing maintenance workload and material waste.

[0035] In some embodiments, the first insulating sheet 5 and / or the second insulating sheet 6 are made of polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), epoxy resin insulating film or silicone rubber material, and have good dielectric strength, heat resistance and mechanical toughness.

[0036] Understandably, the surfaces of the first insulating sheet 5 and / or the second insulating sheet 6 that contact the battery module 200 have a suitable coefficient of friction. When materials such as polycarbonate (PC) are used, their surface properties can effectively increase the friction at the contact interface after the battery module 200 is installed in place, suppress relative displacement caused by vibration or acceleration, prevent the battery module 200 from slipping during operation, and improve system stability.

[0037] In some embodiments, the mounting bracket 2 is a one-piece sheet metal part, which is formed integrally from a single sheet metal material through a bending process. In other embodiments, the mounting bracket 2 is preferably made of 2.5mm thick SGCC cold-rolled steel plate. This structure eliminates the need for multi-part splicing or welding, reducing the use of connectors and assembly processes. It has good overall structural integrity and is simple and easy to manufacture. With fewer processing steps and material consumption, it can meet the requirements of structural strength, reliability, and operational safety, effectively shortening the manufacturing cycle and improving production efficiency. At the same time, it avoids stress concentration, deformation, or loosening problems caused by welding or screwing, improving the rigidity and long-term stability of the mounting bracket 2 and ensuring high-precision and high-consistency installation of the battery module 200.

[0038] Please see Figure 7 According to a second aspect of this application, a battery cluster 1000 is provided, including a battery holder 100 and a battery module 200. The structure of the battery holder 100 is as described in the above embodiments. Since this battery cluster 1000 adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0039] In some embodiments, the assembly process of the battery rack 100 is as follows: First, the stand 1 is fixed in the installation position, and then the two mounting brackets 2 are connected to the column 11 of the stand 1 by threaded fasteners 3, wherein the threaded fasteners 3 pass through the side plate 22 of the mounting bracket 2 and are locked with the rivet nut 4 on the column 11; before or after the mounting bracket 2 is fixed, the first insulating sheet 5 and the second insulating sheet 6 with adhesive backing are respectively attached to the surface of its protrusion 221 and the battery contact surface of the bottom plate 21 to achieve electrical isolation between the battery module 200 and the structure; after each layer of mounting bracket 2 is installed in place, an installation space for accommodating the battery module 200 is formed. Multiple sets of mounting brackets 2 arranged in the vertical direction together constitute a multi-layer battery rack 100 structure, and the battery module 200 is placed layer by layer in the installation space to achieve stable stacking.

[0040] According to a third aspect of this application, a battery energy storage system is also provided, including a battery cluster 1000. Since this battery energy storage system adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0041] The battery energy storage system can be a containerized energy storage system, an industrial and commercial energy storage cabinet, a residential energy storage power supply, a substation-supporting energy storage device, a new energy power station-supporting energy storage system, a microgrid energy storage unit, or a mobile emergency power vehicle, etc.

[0042] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0044] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0045] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery rack (100) for supporting a battery module (200), characterized in that, include: Two sets of uprights (1) extend vertically, and the two sets of uprights (1) are spaced apart in the first direction; Two mounting brackets (2) are spaced apart in a first direction. Each mounting bracket (2) includes a base plate (21) and a side plate (22). The base plate (21) and the side plate (22) both extend along a second direction, which intersects with the first direction. The side plate (22) is connected to the upper side of the base plate (21). In the first direction, the two side plates (22) are respectively connected to the ends of the two base plates (21) that are far apart from each other. Each side plate (22) is also provided with a protrusion (221) facing the other side plate (22). The two mounting brackets (2) are located between the two sets of uprights (1), and the two side plates (22) are respectively fixed to the two sets of uprights (1). The two base plates (21) are used to jointly support a battery module (200), so that the battery module (200) can be restricted between the two protrusions (221) and slide along the second direction.

2. The battery holder (100) according to claim 1, characterized in that, The battery rack (100) also includes a threaded fastener (3) and a rivet nut (4). The rivet nut (4) is embedded in the upright frame (1). The side plate (22) is provided with a connecting hole (223). The threaded fastener (3) passes through the connecting hole (223) and the rivet nut (4) to fix the side plate (22) to the upright frame (1).

3. The battery holder (100) according to claim 2, characterized in that, The side plate (22) has a recess (222) on the side opposite to the other side plate (22), and the connecting hole (223) is provided in the recess (222). The recess (222) provides clearance space for the rivet nut (4).

4. The battery holder (100) according to claim 3, characterized in that, In the first direction, the recess (222) and the convex portion (221) are opposite to each other; The connecting hole (223) includes a countersunk hole, which includes a straight hole section (2231) and a tapered hole section (2232). The threaded fastener (3) includes a shank (31) and a head (32). The shank (31) passes through the straight hole section (2231), and the head (32) is located in the tapered hole section (2232).

5. The battery holder (100) according to claim 4, characterized in that, The battery holder (100) further includes a first insulating sheet (5), which is disposed on the side of the protrusion (221) facing the other protrusion (221).

6. The battery holder (100) according to claim 5, characterized in that, The first insulating sheet (5) is bonded to the protrusion (221); The first insulating sheet (5) is provided with a through hole (51), which is opposite to the countersunk hole so that the head (32) is exposed.

7. The battery holder (100) according to claim 1, characterized in that, The battery rack (100) also includes a second insulating sheet (6), which is disposed on the upper side of the base plate (21) for contacting the lower side of the battery module (200).

8. The battery holder (100) according to any one of claims 1 to 7, characterized in that, Each set of the uprights (1) includes two columns (11) spaced apart in the second direction, and the mounting frame (2) is an integrally formed sheet metal part.

9. A battery cluster (1000), characterized in that, It includes the battery rack (100) as described in any one of claims 1 to 8, and the battery module (200).

10. A battery energy storage system, characterized in that, Includes the battery cluster (1000) as described in claim 9.

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