energy storage device

Abstract

This utility model relates to the field of energy storage equipment technology, and more particularly to an energy storage device. It includes a battery pack and a container. The battery pack is installed inside the container, and multiple uprights are spaced apart inside the container. The battery pack is arranged along the height extension direction of the uprights. The container also has reinforcing beams, with two or more reinforcing beams spaced apart along a direction perpendicular to the height extension of the uprights. The sides of the uprights with the reinforcing beams are opposite to the container doors. Under the weight of the battery pack, the reinforcing beams increase the height support strength of the uprights. The spaced arrangement of the reinforcing beams along the height extension direction of the uprights enhances the support strength during vibration, preventing deformation of the uprights. Furthermore, the placement of the reinforcing beams on the opposite side of the container doors prevents deformation of the uprights from affecting the opening of the doors. Additionally, the placement of the reinforcing beams on the opposite side of the container doors can also help distribute the pressure on the uprights near the doors.

Description

Technical Field

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

[0002] Energy storage devices are highly integrated devices that consist of a container and battery packs. The container houses multiple energy storage battery packs and connects to external devices through a few interfaces. They are characterized by high integration, small footprint, and good scalability, and are an important component of the development of distributed energy, smart grids, and the energy internet in energy storage systems.

[0003] Existing containers are made of square tubes and / or sheet metal parts welded together. The battery packs are lifted to a certain height by a stacker truck and then manually pushed into the energy storage device by the stacker truck. However, multiple battery packs are installed in the container, so the overall support strength requirements of the container are increased. Since the container will vibrate during operation, it will deform. The existing containers cannot meet the support strength requirements of multiple battery packs, thus reducing the stability of the entire container.

[0004] Therefore, there is an urgent need for an energy storage device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to propose an energy storage device that can improve the supporting strength of containers.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An energy storage device includes a battery pack and a container. The battery pack is installed inside the container. Multiple columns are spaced apart inside the container. The battery pack is arranged along the height extension direction of the columns. The container is also provided with reinforcing beams. Two or more reinforcing beams are spaced apart along the height extension direction perpendicular to the columns. The side of the column where the reinforcing beam is located is opposite to the container door.

[0008] This utility model has at least the following beneficial effects:

[0009] In the direction of column height extension, the support strength of the column is increased under the gravity of the battery pack. The reinforcing beams are spaced apart in the direction of column height extension. In this way, the reinforcing beams can enhance the support strength of the column height extension direction during vibration and prevent the column from deforming. At the same time, the reinforcing beams are placed on the opposite side of the container door, so that the deformation of the column can prevent the opening of the container door from being affected. In addition, the reinforcing beams placed on the opposite side of the container door can also be used to share the pressure of the column near the container door. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0011] Figure 1 A schematic diagram of the energy storage device provided in the embodiment of this utility model;

[0012] Figure 2 A first-view structural schematic diagram of a container equipped with a battery bracket, provided for an embodiment of this utility model;

[0013] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0014] Figure 4 A front view of the energy storage device provided in an embodiment of this utility model;

[0015] Figure 5 Rear view of the energy storage device provided in an embodiment of this utility model;

[0016] Figure 6 A second-view structural schematic diagram of a container equipped with a battery bracket, provided for an embodiment of this utility model;

[0017] Figure 7 This is a schematic diagram of the structure of the battery holder provided in an embodiment of the present utility model.

[0018] In the picture:

[0019] 1. Battery pack; 2. Container; 21. Base; 22. Top mount; 23. Support column; 24. Reinforcing rod; 3. Column; 4. Reinforcing beam; 5. Battery bracket; 51. Pallet; 52. Baffle; 53. Connecting plate; 6. Reinforcing structure; 7. Reinforcing beam. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] like Figures 1 to 7 As shown, this utility model provides an energy storage device that can improve the supporting strength of a container.

[0025] Figure 1 A schematic diagram of the energy storage device provided in the embodiment of this utility model; Figure 2 A first-view structural schematic diagram of a container equipped with a battery bracket, provided for an embodiment of this utility model; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0026] like Figures 1 to 3 As shown, the energy storage device includes a battery pack 1 and a container 2. The battery pack 1 is installed inside the container 2. Multiple columns 3 are spaced apart inside the container 2. The battery pack 1 is arranged along the height extension direction of the columns 3. The container 2 is also provided with reinforcing beams 4. Two or more reinforcing beams 4 are arranged at intervals along the height extension direction perpendicular to the columns 3. The side of the column 3 with the reinforcing beams 4 is opposite to the container door of the container 2.

[0027] It is understandable that the battery pack 1 is supported and fixed between two adjacent columns 3. Multiple battery packs 1 are stacked along the height extension direction of the column 3, and two adjacent battery packs 1 do not contact each other. In this way, the battery pack 1 located below will not be squeezed by the gravity of the battery pack 1 above, thus protecting the battery pack 1 located below and preventing the battery pack 1 located at the bottom from being crushed and damaged by excessive weight.

[0028] It should be noted that the reinforcing beam 4 can be fixed to the container 2 by welding or by fasteners. In addition, each reinforcing beam 4 is connected to multiple columns 3, which can prevent the middle of the reinforcing beam 4 from bending downward due to gravity. The length direction of the reinforcing beam 4 is in the same direction as the length extension direction of the container 2, so the reinforcing beam 4 can improve the support strength of the columns 3.

[0029] In the height extension direction of the column 3, under the gravity of the battery pack 1, the supporting strength of the reinforcing beam 4 on the height of the column 3 is improved. The reinforcing beam 4 is set at intervals in the height extension direction of the column 3. In this way, the reinforcing beam 4 can enhance the supporting strength of the column 3 in the height extension direction during vibration and prevent the column 3 from deforming. At the same time, the reinforcing beam 4 is set on the opposite side of the container door of the container 2, which can prevent the deformation of the column 3 from affecting the opening of the container door. In addition, the reinforcing beam 4 is set on the opposite side of the container door, which can also be used to share the pressure of the column 3 near the container door.

[0030] For example, the reinforcing beam 4 can be a tubular beam with a cavity, which reduces the weight of the reinforcing beam 4 and thus prevents an excessive increase in the overall weight of the energy storage device. Of course, in other embodiments, the reinforcing beam 4 can be a solid rod, which increases the strength of the reinforcing beam 4 and prevents deformation of the reinforcing beam 4.

[0031] In some embodiments, the height of the column 3 is H, and the width of the reinforcing beam 4 is W, wherein the value of H:W ranges from (30 to 32):1. Optionally, the value of H:W is 30:1, 31:1, or 32:1, which is not specifically limited in this embodiment.

[0032] When the H:W ratio is 30:1, the width of the reinforcing beam 4 is relatively large, which can improve its strength. When the H:W ratio is 32:1, the overall weight of the reinforcing beam 4 is reduced, and it will not excessively increase the weight of the energy storage device.

[0033] It should be noted that the height H of the column 3 is positively correlated with the width W of the reinforcing beam 4. That is, the higher the column 3 is, the wider the width W of the reinforcing beam 4 is, thus ensuring the overall support strength of the container 2.

[0034] In some embodiments, the height of the column 3 is H, and the distance between two adjacent reinforcing beams 4 is D, wherein the ratio of H:D ranges from (2.9 to 3.1):1.

[0035] For example, the H:D ratio can be 2.9:1, 3:1 or 3.1:1, but is not specifically limited in this embodiment.

[0036] When the H:D ratio is 2.9:1, the number of reinforcing beams 4 can be increased on column 3, thereby improving the strength of column 3. When the H:D ratio is 3.1:1, the weight of the energy storage device can be prevented from increasing excessively while ensuring the strength of column 3.

[0037] It is understandable that the number of reinforcing beams 4 is positively correlated with the height H of the column 3, meaning that the higher the height H of the column 3, the more reinforcing beams 4 are required. Conversely, the height H of the column 3 is inversely correlated with the spacing D between two adjacent reinforcing beams 4, meaning that the higher the column 3, the smaller the spacing between the reinforcing beams 4. This arrangement ensures that the reinforcing beams 4 provide increased support for the column 3, preventing the column 3 from deforming more easily as its height increases.

[0038] By using the above scheme, the higher the column 3 is, the smaller the spacing of the reinforcing beams 4 is. In this way, under the gravity of the battery pack 1, the height support strength of the column 3 is improved in the extension direction of the column 3, so as to adapt to the strength of the column 3 at different heights and thus avoid deformation of the column 3.

[0039] In some embodiments, the container 2 includes a base 21, a top seat 22, and support columns 23. The four corners of the base 21 and the four corners of the top seat 22 are fixedly connected by the support columns 23. That is, there are four support columns 23, and the two ends of the support columns 23 are fixedly connected to the corners of the base 21 and the top seat 22, respectively. Both the base 21 and the top seat 22 are frame structures. Sheet metal parts are covered on the base 21 and the top seat 22 to enclose both of them. In addition, sheet metal parts are covered in the area enclosed by the top seat 22, the base 21, and the support columns 23 along the width direction of the top seat 22 to enclose the area enclosed by the base 21, the top seat 22, and the support columns 23. Sheet metal parts are also covered between the top seat 22, the base 21, and the support columns 23 along the width direction of the top seat 22 to enclose the area enclosed by the base 21, the top seat 22, and the support columns 23. At this time, the reinforcing beam 4 is located inside the sheet metal parts. High weather-resistant steel plates can be used for sheet metal parts, giving container 2 high strength, toughness and resistance to brittle fracture.

[0040] Along the length of the top seat 22, a plurality of spaced reinforcing rods 24 are provided on the top seat 22. In some embodiments, the plurality of reinforcing rods 24 are arranged parallel to each other, and each reinforcing rod 24 is correspondingly provided with a column 3. The provision of reinforcing rods 24 can improve the strength of the top seat 22 and enable the column 3 to be fixedly connected to the top seat 22.

[0041] Figure 6 A second-view structural schematic diagram of a container equipped with a battery bracket, provided for an embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the battery holder provided in an embodiment of the present utility model.

[0042] like Figure 6 and Figure 7 As shown, for example, a battery bracket 5 is provided on the column 3. The number of battery brackets 5 on two adjacent columns 3 is the same, and the battery pack 1 can be supported by the battery brackets 5 on the two adjacent columns 3. That is, the height of the battery brackets 5 on the two adjacent columns 3 is one-to-one. This ensures that the two adjacent columns 3 can support the battery pack 1 and that each battery pack 1 is set parallel to the horizontal plane. The battery brackets 5 are fixed to the column 3 by fasteners, or they can be fixed to the column 3 by welding. Specifically, multiple battery brackets 5 are arranged in parallel, and the length extension direction of the battery brackets 5 is in the same direction as the length extension direction of the column 3.

[0043] It is understandable that among the battery brackets 5 arranged at intervals along the height direction of the column 3, the distance between two adjacent battery brackets 5 must be greater than the height of the battery pack 1. This arrangement can prevent the battery packs 1, which are arranged vertically, from being squeezed together, thus protecting the safety of the battery pack 1 located below.

[0044] Specifically, the battery bracket 5 includes a support plate 51 and a baffle 52, with the baffle 52 positioned on top of the support plate 51. For example, the support plate 51 and the baffle 52 are welded together, with the support plate 51 welded to the baffle 52 on the side facing the column 3. The baffle 52 can be directly connected to the column 3, while the support plate 51 directly supports and lifts the battery pack 1, thereby achieving the purpose of fixing the battery bracket 5 to the column 3 and supporting the battery pack 1.

[0045] For example, the tray 51 and the baffle 52 are L-shaped structures, and the tray 51 and the baffle 52 limit the position of the battery pack 1 and connect it to the column 3.

[0046] In addition, a reinforcing rib is provided between the baffle 52 and the support plate 51. The reinforcing rib is a triangular reinforcing plate provided between the support plate 51 and the baffle 52. The two right-angled sides of the triangular reinforcing plate are fixedly attached to the baffle 52 and the support plate 51 respectively.

[0047] The tray 51 and the baffle 52 are an integral structure, that is, the tray 51 and the baffle 52 are integrally formed. This arrangement facilitates the installation of the battery bracket 5 and improves the overall assembly efficiency of the energy storage device.

[0048] In some other embodiments, the battery holder 5 includes a support plate 51, a baffle 52, and a connecting plate 53. The baffle is positioned above the support plate 51, and the support plate 51 and the baffle 52 are fixedly connected to the column 3 via the connecting plate 53. The baffle 52 has an L-shaped structure. The L-shaped structure of the baffle 52 facilitates the forming of the battery holder 5. In this embodiment, the support plate 51, the connecting plate 53, and the baffle 52 are integrally bent from sheet metal parts.

[0049] A battery box receiving position is formed between the baffle 52, the support plate 51, and the connecting plate 53. The battery box receiving position is an inwardly opening receiving groove. The openings of the two battery box receiving positions of the two opposing battery brackets 5 on two adjacent columns 3 are opposite each other and jointly support and fix a battery pack 1. In this embodiment, the battery box receiving position is adapted to the bottom of the battery pack 1. When the battery pack 1 is installed and fixed in the energy storage space, the two ends of the bottom of the battery pack 1 are respectively fixed in the battery box receiving positions of the two opposing battery brackets 5 on a pair of columns 3.

[0050] The battery bracket 5 is connected to the column 3 by fastening bolts. The vertical rod of each column 3 is fixedly connected to the baffle 52 by two fastening bolts, thereby ensuring that the vertical rod of the column 3 can be stably connected to the battery bracket 5.

[0051] Furthermore, the support plate 51 is fixedly connected to the connecting plate 53 by fastening bolts, and the connecting plate 53 is also connected to the vertical rod of the column 3. That is, the connecting plate 53 is connected to both the vertical rod of the column 3 and the support plate 51. This improves the overall fixing effect of the battery bracket 5.

[0052] Figure 5 A rear view of the energy storage device provided in an embodiment of this utility model. Figure 5 As shown, in some embodiments, a reinforcing beam 7 is also provided between two adjacent reinforcing beams 4, and the reinforcing beam 7 is set at an angle to the reinforcing beam 4. In addition, the reinforcing beam 7 is also set at an angle to the column 3.

[0053] Understandably, the reinforcing beam 7 and the strengthening beam 4 are set at an angle, which allows the reinforcing beam 7 to provide support for the strengthening beam 4, thereby further improving the support strength of the column 3.

[0054] It should be noted that the main frame is formed by connecting the top seat 22, the base 21, and the support column 23. This main frame is rectangular, and its rectangular shape improves the structural strength of the container 2, reducing deformation and torsion. For example, both the base 21 and the top seat 22 include longitudinal and transverse bars, which are perpendicular to each other and fixedly connected. It should also be noted that, depending on the specific load-bearing requirements of the container 2, the transverse bars can be made of channel steel, C-shaped steel, etc., while the longitudinal bars can be made of H-shaped steel, I-beams, square tubing, flat tubing, etc.

[0055] like Figures 1 to 4 As shown, in some embodiments, the container 2 is provided with a reinforcing structure 6 at least at its bottom, the reinforcing structure 6 connecting the column 3 to the crossbeam or sheet metal of the container 2.

[0056] The reinforcement structure 6 can improve the strength of the connection between the crossbar (or sheet metal part of container 2) and the column 3, and prevent the column 3 from swaying along the height direction due to the difference in the connection strength, especially the column 3 tilting relative to the bottom of container 2 over a long period of time.

[0057] Continue to refer to Figure 3 Specifically, the reinforcing structure 6 is triangular in shape. Because the reinforcing structure 6 is triangular, its two perpendicular sidewalls connect to the container 2 and the column 3 respectively, thus strengthening the connection between the container 2 and the column 3 and preventing the column 3 from deforming or tilting relative to the container 2.

[0058] More specifically, the reinforcing structure 6 includes a triangular iron. Triangular irons are readily available and possess strong stability, durability, load-bearing capacity, and ease of installation, thus preventing excessive increases in the production cost of energy storage devices.

[0059] In some embodiments, the width of the reinforcing structure 6 ranges from 29 mm to 31 mm.

[0060] For example, the width of the reinforcing structure 6 is in the range of 29mm, 29.5mm, 30mm, 30.5mm or 31mm, and is not specifically limited in this embodiment.

[0061] Optionally, the width of the reinforcing structure 6 can be 29mm, which can improve the overall strength of the reinforcing structure 6. When the width of the reinforcing structure 6 is 31mm, the weight of the energy storage device can be avoided from increasing significantly while ensuring that the overall strength of the container does not deform.

[0062] Limiting the width of the reinforcing structure 6 can prevent it from being too narrow and failing to effectively reinforce the support column 3, while also preventing it from being too wide and increasing production costs. This ensures that the reinforcing structure 6 has a reasonable width while maintaining its strength in reinforcing the support column 3.

[0063] In some embodiments, the support column 23 is a tubular rod with a cavity, the cross-section of the support column 23 is rectangular, and a column 3 is provided between adjacent support columns 23 along the width direction of the top seat 22.

[0064] It is understandable that the uprights 3 set between the support column 23, the base 21 and the top seat 22 are respectively connected to the two side walls of the support column 23. The cross-section of the support column 23 is rectangular, that is, the support column 23 is a rectangular tubular rod. This arrangement can save space inside the container 2. In addition, the top of the uprights 3 is fixedly connected to the edge of the top seat 22, and the bottom of the uprights 3 is fixedly connected to the edge of the base 21, thereby providing support and fixation for the uprights 3.

[0065] It should be noted that the column 3 includes multiple vertical rods and one horizontal rod. The multiple vertical rods are spaced apart along the length of the column 3, and the length extension direction of the horizontal rod is in the same direction as the length extension direction of the column 3. The horizontal rod is fixedly connected to the multiple vertical rods to fix the multiple vertical rods together to form the column 3. In addition, the horizontal rod is located at the bottom of the battery bracket 5.

[0066] In some embodiments, both the base 21 and the top seat 22 are welded from angle steel, and the support column 23 includes angle steel. In other embodiments, the support column 23 is a tubular beam.

[0067] In some embodiments, the top seat 22 and the column 3 are fixedly connected by a reinforcing structure 6, which improves the connection between the top seat 22 and the column 3. In addition, the reinforcing structure 6 can prevent the column 3 from tilting and improve the strength of the column 3.

[0068] It should be noted that the vertical rods on the outermost two sides of the upright column 3 are respectively connected to the top seat 22 by a reinforcing structure 6. That is, the reinforcing structure 6 is set on the vertical rods near the cabinet door and the vertical rods away from the cabinet door, which can further improve the connection stability between the upright column 3 and the top seat 22.

[0069] In some embodiments, the energy storage box is also equipped with a fire extinguishing device, which includes a sensing element and a plurality of nozzles. The nozzles are installed on the side of the top seat 22 facing the base 21. The nozzles are capable of receiving sensing information from the sensing element and spraying gas and / or liquid.

[0070] The container is also equipped with a fire extinguishing system, which includes sensors and multiple nozzles. The sensors can be smoke detectors and / or heat detectors. The nozzles are located on the top of the container and receive information from the sensors. When the smoke concentration or temperature inside the container reaches a certain range, the nozzles will spray liquid and / or gas to extinguish the fire. The gas and / or liquid sprayed from the nozzles located on the top of the container can directly act downwards on the different battery racks, giving container 2 good fire extinguishing performance.

[0071] The fire extinguishing system also includes an alarm, which sends out an alarm signal based on the information detected by the sensing element. Operators can confirm the authenticity of the fire based on the alarm signal and take appropriate fire extinguishing measures. A fire extinguishing cylinder can be installed inside the enclosure, connected to the sprinkler heads, allowing the release of extinguishing agent to extinguish the fire. Furthermore, the gas sprayed by the sprinkler heads can be FM200 (heptafluoropropane), and the liquid sprayed can be water. Different sprinkler heads can simultaneously spray both gas and liquid for rapid fire extinguishing.

[0072] It should be noted that the fire extinguishing device can be equipped with two detection loops simultaneously. These loops detect the smoke concentration and temperature inside the enclosure, respectively. One loop's alarm, triggered by the smoke detector, sends an alarm signal to alert personnel and facilitate rapid fire detection. The other loop's alarm, triggered by the heat detector, initiates a delay phase. This delay is used for personnel evacuation and to shut down equipment that could affect fire extinguishing effectiveness, such as refrigeration units. After the delay, the nozzles release gas and liquid to extinguish the fire. An indicator panel can be installed on the outside of the enclosure to allow operators to monitor the fire extinguishing status. The alarm activation, detector detection, delay adjustment, and nozzle spraying actions described above can be programmed via a PLC to achieve automatic fire extinguishing.

[0073] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An energy storage device, characterized by, The container includes a battery pack (1) and a container (2). The battery pack (1) is installed inside the container (2). Multiple columns (3) are spaced apart inside the container (2). The battery pack (1) is arranged along the height extension direction of the columns (3). The container (2) is also provided with reinforcing beams (4). Two or more reinforcing beams (4) are arranged at intervals along the height extension direction perpendicular to the columns (3). The side of the column (3) where the reinforcing beams (4) are located is opposite to the container door of the container (2).

2. The energy storage device of claim 1, wherein, The height of the column (3) is H, and the width of the reinforcing beam (4) is W, wherein the value range of H:W is (30~32):

1.

3. The energy storage device of claim 1, wherein, The height of the column (3) is H, and the distance between two adjacent reinforcing beams (4) is D, wherein the ratio of H:D ranges from (2.9 to 3.1):

1.

4. The energy storage device of any one of claims 1-3, wherein, A reinforcing beam (7) is also provided between adjacent reinforcing beams (4), and the reinforcing beam (7) is set at an angle to the reinforcing beam (4).

5. The energy storage device of any one of claims 1-3, wherein, The container (2) is provided with a reinforcing structure (6) at least at the bottom, the reinforcing structure (6) connecting the column (3) to the crossbar or sheet metal of the container (2).

6. The energy storage device of claim 5, wherein, The reinforcing structure (6) has a triangular structure.

7. The energy storage device of claim 6, wherein, The reinforcing structure (6) includes a triangular iron.

8. The energy storage device according to claim 5, characterized in that, The width of the reinforcing structure (6) ranges from 29 mm to 31 mm.

9. The energy storage device according to any one of claims 1-3, characterized in that, The container (2) includes a base (21), a top seat (22) and a support column (23), and the four corners of the base (21) are fixedly connected to the four corners of the top seat (22) through the support column (23).

10. The energy storage device of claim 9, wherein, The support column (23) is a tubular rod with a cavity. The cross-section of the support column (23) is rectangular. Along the width direction of the top seat (22), a column (3) is provided between adjacent support columns (23).

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