Mobile energy storage device and energy storage system

Abstract

The present application discloses a mobile energy storage device and an energy storage system. The mobile energy storage device comprises a battery, a case assembly, and fasteners; the case assembly comprises a bottom case and a top case; the battery is arranged in the bottom case; first connecting columns extending in the height direction of the case assembly are arranged inside the top case; a threaded connecting hole is formed on the surface of each first connecting column facing the bottom case; first reinforcing ribs are arranged on the periphery of each first connecting column; the first reinforcing ribs extend in the height direction of the case assembly to be connected to the top case; second connecting columns extending in the height direction of the case assembly are arranged inside the bottom case; a connecting through hole is formed in each second connecting column, and the connecting through hole runs through the second connecting column and the bottom case in the height direction of the case assembly; second reinforcing ribs are arranged on the periphery of each second connecting column; the second reinforcing ribs extend in the height direction of the case assembly to be connected to the bottom case; and the fasteners pass through the connecting through holes in the height direction of the case assembly and are connected to the threaded connecting holes.

Description

Mobile energy storage devices and energy storage systems

[0001] Related cross-references

[0002] This application claims priority to Chinese Patent Application No. 2024221087396, filed on August 28, 2024, entitled “Mobile Energy Storage Device and Energy Storage System”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of energy storage technology, and in particular to a mobile energy storage device and energy storage system. Background Technology

[0004] In recent years, the application of energy storage products has become increasingly widespread, leading to a growing demand for mobile energy storage devices. Mobile energy storage devices are increasingly favored by users due to their small size, light weight, and ease of movement.

[0005] In related technologies, mobile energy storage devices typically include a top shell, a bottom shell, a battery module and a control module fixed inside the bottom shell. The top shell and bottom shell are usually connected and fixed by a snap-fit ​​structure. However, the load-bearing capacity of the snap-fit ​​structure is generally weak. When the mobile device is lifted by holding the handle on the top shell, the snap-fit ​​structure will be subjected to a large force, which can easily lead to damage to the snap-fit ​​structure and cause the bottom shell to easily detach from the top shell. This can result in components such as the battery module and inverter module falling off when the mobile energy storage device is lifted, thus affecting the use of the mobile energy storage device. Summary of the Invention

[0006] This application discloses a mobile energy storage device and energy storage system that can improve the structural strength of the connection structure between the top shell and the bottom shell, thereby improving the load-bearing capacity of the connection structure between the top shell and the bottom shell, so that the top shell and the bottom shell can be stably connected together, thereby ensuring the use of the mobile energy storage device.

[0007] To achieve the above objectives, the first aspect of this application discloses a mobile energy storage device, the mobile energy storage device comprising:

[0008] Battery;

[0009] A housing assembly, comprising a bottom shell and a top shell connected to the bottom shell, wherein a battery is disposed within the bottom shell, the top shell has a first connecting post extending along the height direction of the housing assembly, the first connecting post having a threaded connection hole on its surface facing the bottom shell, and a first reinforcing rib on its outer peripheral surface extending along the height direction of the housing assembly to connect with the top shell, the bottom shell has a second connecting post extending along the height direction of the housing assembly, the second connecting post having a connection through hole extending along the height direction of the housing assembly through the second connecting post and the bottom shell, the second connecting post having a second reinforcing rib on its outer peripheral surface extending along the height direction of the housing assembly to connect with the bottom shell; and

[0010] Fasteners, which pass through the connecting through-hole and connect to the threaded connecting hole along the height direction of the housing assembly, to achieve the connection between the bottom shell and the top shell.

[0011] In the mobile energy storage device provided in this application, a first connecting post is formed inside the top shell to form a threaded connection hole, and a second connecting post is formed inside the bottom shell to form a connection through hole. Bolts, screws, and other fasteners can be used to connect and fix the top and bottom shells through the connection through hole and the threaded connection hole. That is, the top and bottom shells are connected and fixed using a threaded connection, resulting in a relatively strong connection between the top and bottom shells. Furthermore, installation is convenient, disassembly is easy, and the device is highly practical and easy to operate. In addition, this application provides a first reinforcing rib extending axially along the outer periphery of the first connecting post, and a second reinforcing rib extending axially along the outer periphery of the second connecting post. This strengthens the structural strength of both the first and second connecting posts, allowing them to withstand greater forces and improving their load-bearing capacity. This ensures a stable connection between the top and bottom shells, preventing the battery from falling out due to the bottom shell detaching from the top shell, thus ensuring the usability of the mobile energy storage device.

[0012] Furthermore, since the first reinforcing rib extends along the height direction of the outer shell assembly to connect with the top shell, the first connecting post can be connected to the top shell not only by itself but also through the first reinforcing rib. This improves the stability of the first connecting post on the top shell and further enhances its load-bearing capacity. Similarly, since the second reinforcing rib extends along the height direction of the outer shell assembly to connect with the bottom shell, the second connecting post can be connected to the bottom shell not only by itself but also through the second reinforcing rib. This improves the stability of the second connecting post on the bottom shell and further enhances its load-bearing capacity. Moreover, by forming the first reinforcing rib inside the top shell... The method of forming a threaded connection hole with a connecting post and forming a connecting through hole inside the bottom shell, compared to forming a threaded connection hole directly on the side wall of the top shell and a connecting through hole directly on the side wall of the bottom shell, allows for a local increase in the radial dimensions of the first and second connecting posts. This results in threaded connection holes and connecting through holes with larger radial dimensions, enabling the use of fasteners with larger radial dimensions. This further ensures the connection stability between the top and bottom shells without increasing the overall wall thickness of the top and bottom shells, thereby reducing the overall weight of the mobile energy storage device and facilitating its lifting, movement, and transportation.

[0013] The second aspect of this application discloses an energy storage system having a mobile energy storage device as described in the first aspect above. The energy storage system having the mobile energy storage device described in the first aspect can also improve the structural strength of the connection structure between the top and bottom shells, thereby increasing the load-bearing capacity of the connection structure between the top and bottom shells, ensuring a stable connection between the top and bottom shells, and thus guaranteeing the use of the mobile energy storage device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in 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.

[0015] Figure 1 is a schematic diagram of the structure of the first mobile energy storage device disclosed in the embodiment of this application;

[0016] Figure 2 is a schematic diagram of the structure of the second type of mobile energy storage device disclosed in the embodiments of this application;

[0017] Figure 3 is a first exploded structural diagram of the second type of mobile energy storage device disclosed in the embodiments of this application;

[0018] Figure 4 is a second exploded structural diagram of the second type of mobile energy storage device disclosed in the embodiments of this application;

[0019] Figure 5 is a schematic diagram of the top shell disclosed in the embodiment of this application from a first-view perspective;

[0020] Figure 6 is a schematic diagram of the first type of bottom shell disclosed in the embodiment of this application from a first-view perspective;

[0021] Figure 7 is a structural schematic diagram of the top shell disclosed in the embodiment of this application from a second perspective;

[0022] Figure 8 is a structural schematic diagram of the first type of bottom shell disclosed in the embodiment of this application from a second perspective;

[0023] Figure 9 is a magnified view of part M in Figure 8;

[0024] Figure 10 is a schematic diagram of the structure of the housing assembly disclosed in an embodiment of this application;

[0025] Figure 11 is a cross-sectional view of the housing assembly in Figure 10 along the AA direction;

[0026] Figure 12 is a magnified view of point N in Figure 11;

[0027] Figure 13 is a schematic diagram of the exploded structure of Figure 12;

[0028] Figure 14 is a schematic diagram of the structure of the battery and circuit board assembly disclosed in an embodiment of this application;

[0029] Figure 15 is an exploded structural diagram of the circuit board assembly disclosed in an embodiment of this application;

[0030] Figure 16 is a schematic diagram of the structure of the second type of bottom shell disclosed in the embodiments of this application.

[0031] Key reference numerals: 100 - Mobile energy storage device; 11 - Battery; 12 - Circuit board assembly; 121 - Protective shell; 121a - First side; 121b - Second side; 1211 - Third vent; 1212 - Fourth vent; 1213 - Fan; 122 - Circuit board; 13 - Housing assembly; 131 - Top shell; 131a - First corner; 131b - First sidewall; 131c - First side; 131d - Second side; 131e - First stop surface; 131e1 - Positioning groove; 131f - First chamfer; 1311 - First connecting post; 1311a - Threaded connection hole; 1311b - First end face; 1311c - First sub-connecting post; 1311d - Second sub-connecting post; 1312 - First reinforcing rib; 1313 - First groove; 13 14-External signal inlet; 132-Bottom shell; 132a-Second corner; 132b-Second sidewall; 132e-Second stop surface; 132e1-Positioning protrusion; 132f-Second groove; 132g-Second chamfer; 1321-Second connecting post; 1321a-Connecting through hole; 1321b-Second end face; 1321c-Limiting groove; 1321d-Third sub-connecting post; 1321e-Fourth sub-connecting post; 1322-Second reinforcing rib; 1323-Reinforcing rib; 1323a-Sub-reinforcing rib; 1324-First vent; 1325-Second vent; 1326-Windproof rib; 14-Fastener; 15-Anti-slip pad; 16-Handle; 17-Limiting reinforcement structure; 171-Protruding rib; 172-Stop plate; 18-Elastic element; f1 - Height direction; f2 - Width direction; f3 - Length direction. Detailed Implementation

[0032] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0034] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0037] In related technologies, mobile energy storage devices typically include a top shell, a bottom shell, a battery module and a control module fixed inside the bottom shell. The top shell and bottom shell are usually connected and fixed by a snap-fit ​​structure. However, the load-bearing capacity of the snap-fit ​​structure is generally weak. Since the battery module and control module are fixed to the bottom shell, the weight of the mobile device is concentrated on the bottom shell. This results in the snap-fit ​​structure being subjected to a large force when the mobile device is lifted by holding the handle on the top shell. This can easily lead to damage to the snap-fit ​​structure, causing the bottom shell to easily detach from the top shell. Consequently, when the mobile energy storage device is lifted, components such as the battery module and inverter module may fall off, thus affecting the use of the mobile energy storage device.

[0038] Based on this, this application provides a mobile energy storage device and energy storage system that can improve the load-bearing capacity of the connection structure between the top shell and the bottom shell.

[0039] The technical solution of this application will be further described in detail below with reference to the accompanying drawings.

[0040] Please refer to Figures 1 to 4. This application discloses a mobile energy storage device 100, which includes a battery 11, a circuit board assembly 12, a housing assembly 13, and fasteners 14.

[0041] The housing assembly 13 has a height direction f1, a width direction f2 and a length direction f3, and the housing assembly 13 includes a bottom shell 132 and a top shell 131 connected to the bottom shell 132. The battery 11 and the circuit board assembly 12 are both disposed inside the bottom shell 132, and the circuit board assembly 12 is disposed on one side of the battery 11 and electrically connected to the battery 11.

[0042] Referring to Figures 4 to 6, the top shell 131 of this application has a first connecting post 1311 extending along the height direction f1 of the outer shell assembly 13. The surface of the first connecting post 1311 facing the bottom shell 132 has a threaded connecting hole 1311a, and the outer peripheral surface of the first connecting post 1311 has a first reinforcing rib 1312. The bottom shell 132 has a second connecting post 1321 extending along the height direction f1 of the outer shell assembly 13. The second connecting post 1321 has a connecting through hole 1321a, which passes through the second connecting post 1321 and the bottom shell 132 along the height direction f1 of the outer shell assembly 13. The outer peripheral surface of the second connecting post 1321 has a second reinforcing rib 1322. Fasteners such as bolts and screws 14 pass through the connecting through hole 1321a along the height direction of the outer shell assembly 13 and connect with the threaded connecting hole 1311a to realize the connection between the bottom shell 132 and the top shell 131.

[0043] This application forms a threaded connection hole 1311 inside the top shell 131 by forming a first connecting post 1311, and a second connecting post 1321 inside the bottom shell 132 by forming a connecting through hole 1321a. This allows fasteners such as bolts and screws to pass through the connecting through hole 1321a and connect and fix the top shell 131 and the bottom shell 132 with the threaded connection hole 1311a. In other words, the top shell 131 and the bottom shell 132 are connected and fixed by a threaded connection, which makes the connection between the top shell 131 and the bottom shell 132 more secure. Moreover, it is easy to install and easy to disassemble, making it highly practical and easy to operate. Based on this, this application also provides a first reinforcing rib 1312 extending axially along the outer periphery of the first connecting post 1311, and a second reinforcing rib 1322 extending axially along the outer periphery of the second connecting post 1321. This allows the first reinforcing rib 1312 to enhance the structural strength of the first connecting post 1311, and the second reinforcing rib to enhance the structural strength of the second connecting post 1321. This enables both the first connecting post 1311 and the second connecting post 1321 to withstand greater forces, thereby improving the load-bearing capacity of the first connecting post 1311 and the second connecting post 1321. This ensures that the top shell 131 and the bottom shell 132 can be stably connected together, preventing the battery 11 and circuit board assembly 12 from falling off due to the bottom shell 132 detaching from the top shell 131, thus ensuring the usability of the mobile energy storage device 100.

[0044] Furthermore, by forming a first connecting post 1311 inside the top shell 131 to form a threaded connecting hole 1311a, and a second connecting post 1321 inside the bottom shell 132 to form a connecting through hole 1321a, compared to forming a threaded connecting hole 1311a directly on the side wall of the top shell 131 and a connecting through hole 1321a directly on the side wall of the bottom shell 132, the radial dimensions of the first connecting post 1311 and the second connecting post 1321 can be locally increased to form threaded connecting holes 1311a and connecting through holes 1321a with larger radial dimensions. This allows for the use of fasteners 14 with larger radial dimensions, further ensuring the connection stability between the top shell 131 and the bottom shell 132 without increasing the overall wall thickness of the top shell 131 and the bottom shell 132. This reduces the overall weight of the mobile energy storage device 100, making it easier to lift and move, transport, etc.

[0045] Meanwhile, since the fastener 14 is connected to the threaded connection hole 1311a through the connecting through hole 1321a from the bottom surface of the bottom shell 132 facing away from the bottom surface of the top shell 131, that is, the nut of the fastener 14 is located on the bottom surface side of the bottom shell 132, and there are no holes on the top surface of the top shell 131. At the same time, since when the mobile energy storage device 100 is placed on a flat surface such as a table, countertop or ground, the bottom surface of the bottom shell 132 is generally in contact with the flat surface, and the top surface of the top shell 131 is exposed to the environment, the above-mentioned fixing method between the top shell 131 and the bottom shell 132 can also prevent rainwater and other liquids from entering the interior of the outer shell assembly 13 through the holes on the top surface of the top shell 131, thereby improving the waterproof performance of the outer shell assembly 13.

[0046] In this application, the first reinforcing rib 1312 can extend along the height direction f1 of the outer shell assembly 13 to connect with the top shell 131. This allows the first connecting post 1311 to connect with the top shell 131 not only by itself but also by the first reinforcing rib 1312, thereby improving the stability of the first connecting post 1311 on the top shell 131 and further enhancing its load-bearing capacity. Similarly, the second reinforcing rib 1322 can extend along the height direction f1 of the outer shell assembly 13 to connect with the bottom shell 132. This allows the second connecting post 1321 to connect with the bottom shell 132 not only by itself but also by the second reinforcing rib 1322, thereby improving the stability of the second connecting post 1321 on the bottom shell 132 and further enhancing its load-bearing capacity.

[0047] Optionally, there may be multiple first reinforcing ribs 1312, which are arranged at intervals along the circumference of the first connecting post 1311, with at least one first reinforcing rib 1312 connected to the side wall of the top shell 131. This can further improve the structural stability of the first connecting post 1311, thereby further improving the load-bearing capacity of the first connecting post 1311, and thus making the top shell 131 and the bottom shell 132 more securely connected together, so as to avoid the battery 11 falling off due to the bottom shell 132 detaching from the top shell 131, and thus ensuring the use of the mobile energy storage device 100.

[0048] Similarly, there can be multiple second reinforcing ribs 1322, which are arranged at intervals along the circumference of the second connecting post 1321, with at least one second reinforcing rib 1322 connected to the side wall of the bottom shell 132. This can further improve the structural stability of the second connecting post 1321, thereby further improving the load-bearing capacity of the second connecting post 1321, and thus making the top shell 131 and the bottom shell 132 more firmly connected together, so as to avoid the battery 11 falling off due to the bottom shell 132 detaching from the top shell 131, and thus ensuring the use of the mobile energy storage device 100.

[0049] In this application, the battery 11 may include one or more cells, and the cell may be a rectangular structure. Each rectangular cell has two large opposing faces along the width direction f2 of the housing assembly and two small opposing faces along the length direction f3 of the housing assembly. When the battery 11 includes multiple cells, such as two, three, four, five, six or more, the multiple cells are arranged sequentially along the width direction f2 of the housing assembly 13, and the large faces of the multiple cells are stacked sequentially along the width direction f2 of the housing assembly 13. The multiple cells are connected in series or in parallel with each other.

[0050] In some optional embodiments, the first connecting post 1311 includes a first sub-connecting post 1311c and a second sub-connecting post 1311d. The top shell 131 is a shell structure formed by a plurality of first sidewalls 131b. Two adjacent first sidewalls 131b are connected at an angle to form a first corner 131a. A first sub-connecting post 1311c is provided at each first corner first sidewall 131b, and at least one first sidewall 131b is provided with a second sub-connecting post 1311d at a position between two adjacent first sub-connecting posts 1311c. The outer peripheral surface of the first sub-connecting post 1311c is connected to the first corner 131a through a corresponding first reinforcing rib 1312, or the outer peripheral surface of the first sub-connecting post 1311c is connected to both adjacent first sidewalls 131b through a corresponding first reinforcing rib 1312, and the outer peripheral surface of the second sub-connecting post 1311d is connected to the first sidewall 131b through a corresponding first reinforcing rib 1312.

[0051] Correspondingly, the second connecting post 1321 includes a third sub-connecting post 1321d and a fourth sub-connecting post 1321e. The bottom shell 132 is a shell structure formed by multiple second side walls 132b. Two adjacent second side walls 132b are connected at an angle to form a second corner 132a. A third sub-connecting post 1321d is provided at each second corner 132a. At least one second side wall 132b is provided with a fourth sub-connecting post 1321e at a position between two adjacent third sub-connecting posts 1321d. The outer peripheral surface of the third sub-connecting post 1321d is connected to the second corner 132a through a corresponding second reinforcing rib 1322, or the outer peripheral surface of the third sub-connecting post 1321d is connected to both adjacent second side walls 132b through a corresponding second reinforcing rib 1322. The outer peripheral surface of the fourth sub-connecting post 1321e is connected to the second side wall 132b through a corresponding second reinforcing rib 1322.

[0052] The above design allows for a more uniform tensile force between the top shell 131 and the bottom shell 132, which helps to further improve the connection stability between the top shell 131 and the bottom shell 132, so that the top shell 131 and the bottom shell 132 can be firmly connected together, thus preventing the battery 11 and circuit board assembly 12 from falling off due to the bottom shell 132 detaching from the top shell 131, improving the load-bearing capacity of the outer shell assembly 13, and thus ensuring the use of the mobile energy storage device 100.

[0053] For example, as shown in Figures 4 to 6, the top shell 131 can be a rectangular shell with four first side walls 131b and four first corners 131a. Two of the first side walls 131b extend along the length direction f3 and are arranged opposite each other in the width direction f2. The other two first side walls 131b extend along the width direction f2 and are arranged opposite each other in the length direction f3. Each first corner 131a is provided with a first sub-connecting post 1311c, and the two first side walls 131b arranged opposite each other in the width direction f2 are provided with a second sub-connecting post 1311d at the position of two adjacent first sub-connecting posts 1311c. Thus, at least six first connecting posts 1311 are provided inside the top shell 131.

[0054] Correspondingly, the bottom shell 132 can be a rectangular shell with four second side walls 132b and four second corners 132a. Two of the second side walls 132b extend along the length direction f3 and are arranged opposite each other in the width direction f2. The other two second side walls 132b extend along the width direction f2 and are arranged opposite each other in the length direction f3. A third sub-connecting post 1321d is provided at each second corner 132a. A fourth sub-connecting post 1321e is provided at the position of the two second side walls 132b arranged opposite each other in the width direction f2, located at the position of the two adjacent third sub-connecting posts 1321d. Thus, at least six second connecting posts 1321 are provided inside the bottom shell 132.

[0055] Correspondingly, the mobile energy storage device 100 may include at least six fasteners 14, each fastener 14 passing through a connecting through hole 1321a and connected to a threaded connecting hole 1311a. This design allows for a more uniform tensile force between the top shell 131 and the bottom shell 132, thereby further improving the connection stability between the top shell 131 and the bottom shell 132, ensuring a stable connection between them. This prevents the battery 11 and circuit board assembly 12 from falling off due to the bottom shell 132 detaching from the top shell 131, improves the load-bearing capacity of the outer casing assembly 13, and thus ensures the usability of the mobile energy storage device 100.

[0056] In some optional embodiments, the bottom surface of the bottom shell 132 facing away from the top shell 131 is provided with anti-slip pads 15. In this way, the anti-slip pads can increase the friction of the bottom surface of the bottom shell 132, prevent the mobile energy storage device 100 from slipping, and play a role in gripping and anti-slip.

[0057] For example, anti-slip pads 15 are provided at the four second corners 132a of the bottom shell 132, and the anti-slip pads can be made of silicone, rubber, plastic, etc.

[0058] In some optional embodiments, as shown in FIG7, the top shell 131 has a first side 131c and a second side 131d opposite each other in a preset direction. The mobile energy storage device also includes two handles 16, which are respectively connected to the top shell 131 and are both located outside the top shell 131. One handle 16 is located on the first side 131c of the top shell 131, and the other handle 16 is located on the second side 131d of the top shell 131. The preset direction is configured as the length direction f3 or the width direction f2 of the outer shell assembly. In this way, when moving the mobile energy storage device, the user can hold the handle 16 with their hands or clamping tools to lift the mobile energy storage device and move it to the target location, which makes the movement of the mobile energy storage device more convenient. At the same time, this application adopts a double handle design with handles 16 on both sides of the top shell 131 (i.e., the first side 131c and the second side 131d). When the user holds the handle to lift the mobile energy storage device, they can hold one handle 16 with both hands to move the mobile energy storage device, or two people can work together to move the mobile energy storage device, with one person holding one handle 16 to move the mobile energy storage device. This can realize the distribution of force, thereby facilitating the movement and handling of the mobile energy storage device.

[0059] In some optional embodiments, the top surface of the top shell 131 facing away from the bottom shell 132 is provided with two spaced-apart first grooves 1313, one of which is located on the first side 131c of the top shell 131 and penetrates the side of the first side 131c in a predetermined direction, and the other is located on the second side 131d of the top shell 131 and penetrates the side of the second side 131d in a predetermined direction. Each handle 16 is at least partially housed in one of the first grooves 1313, and a gripping space is formed between each handle 16 and a first groove 1313 for a user's hand to reach in and grasp the handle 16. The groove sidewall of one of the first grooves 1313 is provided with an external signal input 1314, which is electrically connected to the circuit board assembly 12. External signal input 1314 is used for electrical connection with smart terminals such as desktop computers, laptops, tablets, or mobile phones. This allows the power conversion system or inverter, battery management system, controller, and safety devices (such as fire extinguishers, sensors, and alarms) in the circuit board assembly 12 to be projected onto the smart terminal. This enables the smart terminal to perform corresponding operations to upgrade or repair the aforementioned devices, allowing for upgrades and device repairs without disassembling the mobile energy storage device. Furthermore, the external signal input 1314 is located on the side wall of one of the first recesses 1313, making its location relatively concealed to avoid affecting the appearance of the top cover 131.

[0060] In addition, since the handle 16 is at least partially housed in the first groove 1313, it is beneficial to make the structure of the mobile energy storage device more compact, thereby facilitating the miniaturization design of the mobile energy storage device.

[0061] Optionally, the external signal input 1314 may be, but is not limited to, a High Definition Multimedia Interface (HDMI), a Video Graphics Array (VGA), a Digital Visual Interface (DVI), or a Mobile Industry Processor Interface (MIPI).

[0062] In some optional embodiments, as shown in Figures 8 and 9, the mobile energy storage device further includes a limiting reinforcement structure 17 disposed within the bottom shell 132. This limiting reinforcement structure 17 includes two ribs 171 spaced apart circumferentially along the bottom shell 132 and a stop plate 172 connected between the two ribs 171. Each rib 171 is connected to the inner sidewall of the bottom shell 132 and to the inner bottom surface of the bottom shell 132. The stop plate 172 is spaced apart from the inner sidewall of the bottom shell 132. The abutment plate 172 and the two protruding ribs 171 abut against the circuit board assembly 12 to limit the position of the circuit board assembly 12 within the bottom shell 132, preventing the circuit board assembly 12 from shaking or moving along the length direction f3 and / or the width direction f2, thereby avoiding collisions with the circuit board assembly 12 and protecting the circuit board assembly 12. At the same time, the protruding ribs 171 can also be used to strengthen the structural strength of the bottom shell 132 and improve the load-bearing capacity of the bottom shell 132 so that the bottom shell 132 can better load the battery and circuit board assembly.

[0063] In the above design, since both the stop plate 172 and the two protruding ribs 171 abut against the circuit board assembly 12, compared to the method where only the two protruding ribs 171 abut against the circuit board assembly 12, the contact area between the limiting reinforcement structure 17 and the circuit board assembly 12 can be increased, thereby improving the limiting effect of the limiting reinforcement structure 17 on the circuit board assembly 12. Furthermore, in this application, the stop plate 172 is not only connected to the two protruding ribs 171 but also to the inner bottom surface of the bottom shell 132. Therefore, when the stop plate 172 abuts against the circuit board assembly 12, the two protruding ribs 171 and the inner bottom surface of the bottom shell 132 can support the stop plate 172, providing support force and making the stop plate 172 less likely to be crushed when abutted by the circuit board assembly 12. Further, since the stop plate 172 and the inner sidewall of the bottom shell 132 are spaced apart, this helps to reduce the use of materials and the weight of the bottom shell 132, thereby reducing costs and achieving a lightweight design.

[0064] In one exemplary embodiment, the bottom shell 132 has the aforementioned limiting and reinforcing structure 17 on at least one side in the length direction f3. In this case, the two protruding ribs and the stop plate of the limiting and reinforcing structure 17 abut against the circuit board assembly 12 to limit the circuit board assembly from shaking or moving along the length direction f3. In another exemplary embodiment, the bottom shell 132 has the aforementioned limiting and reinforcing structure 17 on at least one side in the width direction f2. In this case, the two protruding ribs and the stop plate of the limiting and reinforcing structure 17 abut against the circuit board assembly to limit the battery from shaking or moving along the width direction f2. In another exemplary embodiment, the bottom shell 132 is provided with the aforementioned limiting reinforcement structure 17 on at least one side in the length direction f3. In this case, the two protruding ribs and the stop plate of the limiting reinforcement structure 17 abut against the circuit board assembly to restrict the battery from shaking or moving along the length direction f3. At the same time, the bottom shell 132 is provided with the aforementioned limiting reinforcement structure 17 on at least one side in the width direction f2. In this case, the two protruding ribs and the stop plate of the limiting reinforcement structure 17 abut against the circuit board assembly to restrict the circuit board assembly from shaking or moving along the width direction f2.

[0065] In some optional embodiments, the second sidewall 132b of the bottom shell 132 is provided with reinforcing ribs 1323. For example, two second sidewalls 132b arranged opposite each other in the length direction f3 are provided with reinforcing ribs 1323. This can further increase the structural strength of the bottom shell 132 by using the reinforcing ribs 1323, thereby further improving the load-bearing capacity of the bottom shell 132 so that the bottom shell 132 can better load the battery and circuit board assembly. At the same time, it can also reduce the degree of deformation of the bottom shell 132 when subjected to external pressure, or prevent the bottom shell 132 from deforming, so as to protect the battery from being squeezed when the bottom shell 132 is subjected to external pressure.

[0066] Furthermore, the reinforcing rib 1323 may include a plurality of sub-reinforcing ribs 1323a spaced apart circumferentially along the bottom shell 132, and each sub-reinforcing rib 1323a extends along the height direction f1 of the bottom shell 132; both protruding ribs 171 are located between two adjacent sub-reinforcing ribs 1323a, or at least one of the two protruding ribs 171 is connected to the sub-reinforcing rib 1323a in the height direction f1 of the bottom shell 132, and the height of the protruding rib 171 relative to the second sidewall 132b of the bottom shell 132 is greater than the height of the sub-reinforcing rib 1323a relative to the second sidewall 132b of the bottom shell 132, so that when the stop plate 172 abuts against the circuit board assembly, the sub-reinforcing rib 1323a is spaced apart from the circuit board assembly. By making the height of the protrusion of the rib 171 relative to the second side wall 132b of the bottom shell 132 greater than the height of the sub-reinforcing rib 1323a relative to the second side wall 132b of the bottom shell 132, the sub-reinforcing rib 1323a can be prevented from blocking or hitting the circuit board assembly when the circuit board assembly is inserted into the bottom shell 132 through the mounting opening of the bottom shell 132, thereby avoiding damage to the circuit board assembly, and also facilitating the insertion of the battery into the bottom shell 132.

[0067] As an optional implementation, as shown in Figures 10 to 13, the top shell 131 has a first abutment surface 131e at the end near the bottom shell 132 that abuts against the bottom shell 132, and the bottom shell 132 has a second abutment surface 132e at the end near the top shell 131 that abuts against the first abutment surface 131e. One of the first abutment surface 131e and the second abutment surface 132e is provided with a positioning groove 131e1, and the other of the first abutment surface 131e and the second abutment surface 132e is provided with a positioning protrusion 132e1. That is, when the first abutment surface 131e is provided with a positioning groove 131e1, the second abutment surface 132e is provided with a positioning protrusion 132e1, and when the first abutment surface 131e is provided with a positioning protrusion 132e1, the second abutment surface 132e is provided with a positioning groove 131e1, wherein the positioning protrusion 132e1 is embedded in the positioning groove 131e1. Thus, when assembling the top shell 131 to the bottom shell 132, the positioning protrusion 132e1 and the positioning groove 131e1 can be used to position and limit the assembly between the top shell 131 and the bottom shell 132, so as to ensure that the threaded connection hole 1311a and the connection through hole 1321a can be set coaxially, thereby facilitating the fastener 14 to pass through the connection through hole 1321a and connect to the threaded connection hole 1311a.

[0068] As another optional implementation, referring to Figures 10 to 13, the first connecting post 1311 has a first end face 1311b facing the bottom shell 132, and the second connecting post 1321 has a second end face 1321b facing the top shell 131. One of the first end face 1311b of the first connecting post 1311 and the second end face 1321b of the second connecting post 1321 is provided with a limiting groove 1321c, and the other of the first connecting post 1311 and the second connecting post 1321 is embedded in the limiting groove 1321c. That is, when the first end face 1311b of the first connecting post 1311 is provided with the limiting groove 1321c, the second connecting post 1321 is embedded in the limiting groove 1321c, and when the second end face 1321b of the second connecting post 1321 is provided with the limiting groove 1321c, the first connecting post 1311 is embedded in the limiting groove 1321c. Thus, when assembling the top shell 131 to the bottom shell 132, the first connecting post 1311 or the second connecting post 1321 can cooperate with the limiting groove 1321c to position and limit the assembly between the top shell 131 and the bottom shell 132, so as to ensure that the threaded connecting hole 1311a and the connecting through hole 1321a can be coaxially set, thereby facilitating the fastener 14 to pass through the connecting through hole 1321a and connect with the threaded connecting hole 1311a.

[0069] As another optional implementation, referring to Figures 10 to 13, the top shell 131 has a first abutment surface 131e at the end near the bottom shell 132 that abuts against the bottom shell 132, and the bottom shell 132 has a second abutment surface 132e at the end near the top shell 131 that abuts against the first abutment surface 131e. One of the first abutment surface 131e and the second abutment surface 132e is provided with a positioning groove 131e1, and the other of the first abutment surface 131e and the second abutment surface 132e is provided with a positioning protrusion 132e1. The protrusion 132e1 is embedded in the positioning groove 131e1; and the first connecting post 1311 has a first end face 1311b facing the bottom shell 132, the second connecting post 1321 has a second end face 1321b facing the top shell 131, one of the first end face 1311b of the first connecting post 1311 and the second end face 1321b of the second connecting post 1321 is provided with a limiting groove 1321c, and the other of the first connecting post 1311 and the second connecting post 1321 is embedded in the limiting groove 1321c. Thus, when assembling the top shell 131 to the bottom shell 132, the positioning protrusion 132e1 and the positioning groove 131e1 can be used to position and limit the assembly between the top shell 131 and the bottom shell 132. At the same time, the first connecting post 1311 or the second connecting post 1321 can be used to position and limit the assembly between the top shell 131 and the bottom shell 132 through the positioning groove 131e1. This can achieve a double positioning and limiting effect, thereby effectively ensuring that the threaded connecting hole 1311a and the connecting through hole 1321a can be set coaxially, so that the fastener 14 can pass through the connecting through hole 1321a and connect to the threaded connecting hole 1311a.

[0070] In some optional embodiments, the top shell 131 has a first stop surface 131e that abuts against the bottom shell 132 at one end near the bottom shell 132, and the bottom shell 132 has a second stop surface 132e that abuts against the first stop surface 131e at one end near the top shell 131. The outer peripheral side of the bottom shell 132 is provided with a second groove 132f that penetrates the second stop surface 132e. The mobile energy storage device 100 also includes an elastic element 18, which is disposed on the groove wall of the second groove 132f. That is, the elastic element 18 can be elastically bound to the groove wall of the second groove 132f of the bottom shell 132. Since the elastic element 18 is elastic, it can be pulled out or pulled back, so that the elastic element 18 can be used as a clamping element to temporarily clamp some small objects such as sticky notes, and has a certain temporary fixing and clamping effect.

[0071] Optionally, the elastic element 18 may be a silicone ring, rubber ring, plastic ring, or foam ring, etc., such as a sealing ring or sealant.

[0072] In some optional embodiments, a first chamfer 131f is provided at the connection between the outer peripheral side of the top shell 131 and the first stop surface 131e, and / or a second chamfer 132g is provided at the connection between the outer peripheral side of the bottom shell 132 and the groove wall of the second groove 132f, wherein the first chamfer 131f and the second chamfer 132g can both be chamfered angles or rounded corners. The presence of chamfers or rounded corners can prevent sharp corners from forming at the connection between the outer peripheral side of the top shell 131 and the first stop surface 131e, and at the connection between the outer peripheral side of the bottom shell 132 and the groove wall of the second groove 132f. This can prevent sharp corners from piercing, cutting, or damaging the elastic element 18, thereby reducing the risk of the elastic element 18 being pierced or cut, and ensuring the sealing performance of the sealing ring. At the same time, when the mobile energy storage device 100 of this application is placed outdoors and it rains, the rainwater will flow from the outer peripheral side of the top shell 131 towards the bottom shell 132 under its own gravity. When the rainwater drips to the second chamfer 132g, it can be guided by the second chamfer 132g to flow to the outer peripheral side of the bottom shell 132, so that the rainwater continues to flow downward along the outer peripheral side of the bottom shell 132. This can further improve the waterproof performance of the outer shell assembly 13.

[0073] Since the expansion of battery 11 mainly manifests as expansion and deformation of its large surface area, this application places circuit board assembly 12 on one of the smaller surfaces of battery 11. This reduces the degree of compression exerted on circuit board assembly 12 by battery 11 during expansion, thereby avoiding damage to circuit board assembly 12. Circuit board assembly 12 may be fixedly connected to one of the smaller surfaces of battery 11, or it may not be fixed to one of the smaller surfaces of battery 11, but rather adjacent to and opposite to one of the smaller surfaces.

[0074] In some optional embodiments, in the two opposing second sidewalls 132b of the bottom shell 132 along the width direction f2, one second sidewall 132b is provided with a first vent 1324 extending along the width direction f2, and the other second sidewall 132b is provided with a second vent 1325 extending along the width direction f2. The first vent 1324 and the second vent 1325 are both provided corresponding to the circuit board assembly 12. This design can utilize the first vent 1324 and the second vent 1325 to form thermal convection, allowing the gas around the circuit board assembly 12 to flow, thereby carrying away the heat of the circuit board assembly 12, so as to achieve heat dissipation and cooling of the circuit board assembly 12, prevent the circuit from overheating and causing overload and failure, and thus help ensure the normal operation of the circuit board assembly 12 and improve the safety of the mobile energy storage device 100.

[0075] In this application, as shown in Figures 14 and 15, the circuit board assembly 12 may include a protective shell 121 and a circuit board 122 disposed within the protective shell. The circuit board 122 is electrically connected to the battery 11. The circuit board 122 can serve as a key component for monitoring, controlling, and protecting the battery 11. It may integrate a battery management system (BMS). On the one hand, it can monitor and manage parameters such as the voltage, temperature, charging state, and discharging state of the battery 11, thereby avoiding dangerous situations such as overcharging, over-discharging, overcurrent, and short circuits, ensuring the safe operation of the battery 11 and extending its service life. On the other hand, since the mobile energy storage device in this application is typically a low-voltage design, it can greatly improve the safety factor for operators and reduce the risk factor of the product in terms of production and maintenance. At the same time, based on the voltage conversion circuit provided by the internal voltage conversion circuit of the battery management system, the low-voltage battery system output can be adapted to high voltage in different application scenarios, that is, it can achieve flexible voltage boosting and deboosting while reducing the difficulty of operation.

[0076] For example, the circuit board 122 is provided with functional circuits of different functions. For example, bidirectional buck-boost circuit, bidirectional isolation circuit, and AC-DC conversion circuit (i.e., AC-DC inverter circuit, which includes an inverter), etc. It can be understood that in actual use, the circuit board 122 can integrate different functional circuits according to the application scenario of the mobile energy storage device 100 to meet the application requirements.

[0077] Based on the fact that the mobile energy storage device of this application is a low-voltage design, its voltage value is usually lower than 310V. Therefore, when the battery 11 of this application is discharging, the low-voltage DC output of the battery 11 will first be boosted to 310V DC by the bidirectional buck-boost circuit on the circuit board 122, and then inverted to 220V AC by the AC-DC conversion circuit on the circuit board 122 to meet the charging requirements of the device to be charged and realize the discharge of the mobile energy storage device 100. When the battery 11 of this application is charging, the externally input 220V AC will first be inverted to 310V DC by the AC-DC conversion circuit on the circuit board 122, and then stepped down to DC with a voltage value lower than 310V by the bidirectional buck-boost circuit on the circuit board 122 to meet the charging requirements of the battery 11 and realize the charging of the battery 11.

[0078] In some optional embodiments, as shown in Figures 14 to 16, the protective shell 121 has a first side 121a and a second side 121b opposite each other in the width direction f2. The first side 121a has a third vent 1211 extending through the width direction f2, and the second side 121b has a fourth vent 1212 extending through the width direction f2. The third vent 1211 and the fourth vent 1212 are connected, and the third vent 1211 is located on the same side as and connected to the first vent 1324. A fan 1213 is installed at the third vent 1211. The fourth vent 1212 is located on the same side and connected to the second vent 1325, so that the fan 1213 installed at the third vent 1211 can form thermal convection through the fourth vent 1212, the first vent 1324 and the second vent 1325, so that the air around the circuit board 122 flows, thereby removing the heat from the circuit board 122, so as to achieve heat dissipation and cooling of the circuit board 122, preventing the circuit from overheating and causing overload and failure, and thus helping to ensure the normal operation of the circuit board assembly 12 and improve the safety of the mobile energy storage device 100.

[0079] In this application, when the fan 1213 is turned on to dissipate heat from the circuit board 122, for example, the gas outside the bottom shell 132 enters the interior of the bottom shell 132 through the first vent 1324 under the action of the fan 1213, and then enters the protective shell 121 under the action of the fan 1213 and blows it toward the circuit board 122, taking away the heat from the circuit board 122. Then it is discharged from the fourth vent 1212 to the outside of the protective shell 121, and finally discharged from the second vent 1325 to the outside of the bottom shell 132, thereby achieving the effect of dissipating heat from the circuit board 122. In another example, the gas outside the bottom shell 132 enters the interior of the bottom shell 132 through the second vent 1325 under the action of the fan 1213, and enters the protective shell 121 through the fourth vent 1212 and flows through the circuit board 122, taking away the heat of the circuit board 122. Then, under the action of the fan 1213, it is discharged outside the protective shell 121, and finally discharged outside the bottom shell 132 through the first vent 1324, thereby achieving the effect of heat dissipation for the circuit board 122.

[0080] Furthermore, in the width direction f2, the projection of the third vent 1211 on the bottom shell 132 at least partially coincides with the first vent 1324, and in the width direction f2, the projection of the fourth vent 1212 on the bottom shell 132 at least partially coincides with the second vent 1325. This can accelerate the flow rate of gas, thereby improving the heat dissipation effect of the fan 1213 on the circuit board 122.

[0081] In some alternative embodiments, a wind-blocking rib 1326 protrudes from the opposite second sidewall 132b along the width direction f2 and is located within the bottom shell 132. One wind-blocking rib 1326 and the first vent 1324 are arranged along the length direction f3, and another wind-blocking rib 1326 and the second vent 1325 are arranged along the length direction f3. Each wind-blocking rib 1326 extends along the width direction f2 toward the circuit board assembly and / or the battery and abuts against the surface of the circuit board assembly 12 and / or the battery 11 toward the second sidewall 132b. Alternatively, each wind-blocking rib 1326 extends along the width direction f2 toward the circuit board assembly and / or the battery and is located between the circuit board assembly 12 (i.e., the protective shell 121) and the battery 11. This not only allows the wind deflector 1326 to block the hot air flowing through the circuit board 122 from flowing to the battery 11, thus preventing the battery 11 from operating in a high-temperature environment and ensuring the stable working state of the battery 11, thereby improving its reliability and stability; at the same time, the wind deflector 1326 can also be used to enhance the structural strength of the bottom shell 132.

[0082] This application also discloses an energy storage system having a mobile energy storage device as described in any of the foregoing embodiments. Specifically, the energy storage system may include an electrical device and a mobile energy storage device as described in any of the foregoing embodiments, the mobile energy storage device being used to supply power to the electrical device. It is understood that an energy storage system having the mobile energy storage device described above can bring the same or similar beneficial effects as the mobile energy storage device, as detailed in the description of the embodiments of the mobile energy storage device, which will not be repeated here.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] Furthermore, the embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the content of this specification should not be construed as a limitation of this application, and the protection scope of this application should be determined by the appended claims.

Claims

1. A mobile energy storage device, characterized in that, The mobile energy storage device includes: Battery; A housing assembly, the housing assembly including a bottom shell and a top shell connected to the bottom shell, wherein the battery is disposed within the bottom shell; The top shell has a first connecting post extending along the height direction of the outer shell assembly inside. The first connecting post has a threaded connection hole on the surface facing the bottom shell. The outer peripheral surface of the first connecting post has a first reinforcing rib protruding. The first reinforcing rib extends along the height direction of the outer shell assembly to connect with the top shell. The bottom shell has a second connecting post extending along the height direction of the outer shell assembly. The second connecting post has a connecting through hole that penetrates both the second connecting post and the bottom shell along the height direction of the outer shell assembly. A second reinforcing rib protrudes from the outer periphery of the second connecting post and extends along the height direction of the outer shell assembly to connect with the bottom shell. Fasteners that pass through the connecting through-hole and connect to the threaded connection hole along the height direction of the housing assembly.

2. The mobile energy storage device according to claim 1, characterized in that, There are multiple first reinforcing ribs, which are arranged at intervals along the circumference of the first connecting column, and at least one first reinforcing rib is connected to the side wall of the top shell; and / or, There are multiple second reinforcing ribs, which are arranged at intervals along the circumference of the second connecting column, and at least one second reinforcing rib is connected to the side wall of the bottom shell.

3. The mobile energy storage device according to claim 1, characterized in that, The first connecting post includes a first sub-connecting post and a second sub-connecting post. The top shell is a shell structure formed by multiple first sidewalls. Two adjacent first sidewalls are connected at an angle to form a first corner. Each first corner is provided with a first sub-connecting post, and at least one first sidewall is provided with a second connecting post located between two adjacent first sub-connecting posts. The outer peripheral surface of the first sub-connecting post is connected to the first corner through a corresponding first reinforcing rib, or the outer peripheral surface of the first connecting post is connected to both adjacent first sidewalls through a corresponding first reinforcing rib, and the outer peripheral surface of the second connecting post is connected to the first sidewall through a corresponding first reinforcing rib. The second connecting post includes a third sub-connecting post and a fourth sub-connecting post. The bottom shell is a shell structure formed by multiple second side walls. Two adjacent second side walls are connected at an angle to form a second corner. A third sub-connecting post is provided at each second corner. At least one second side wall is provided with a fourth sub-connecting post located between two adjacent third sub-connecting posts. The outer peripheral surface of the third sub-connecting post is connected to the second corner through a corresponding second reinforcing rib, or the outer peripheral surface of the third connecting post is connected to both adjacent second side walls through a corresponding second reinforcing rib. The outer peripheral surface of the fourth connecting post is connected to the second side wall through a corresponding second reinforcing rib.

4. The mobile energy storage device according to claim 1, characterized in that, The top shell has a first side and a second side opposite to each other in a preset direction. The mobile energy storage device also includes two handles, which are respectively connected to the top shell and are both located outside the top shell. One of the handles is located on the first side of the top shell, and the other handle is located on the second side of the top shell. The preset direction is configured as the length direction or the width direction of the housing assembly.

5. The mobile energy storage device according to claim 4, characterized in that, The mobile energy storage device also includes a circuit board assembly disposed in the bottom shell. The top shell has two spaced-apart first grooves on its top surface facing away from the bottom shell. One of the first grooves is located on the first side and penetrates the side of the first side in the preset direction. The other first groove is located on the second side and penetrates the side of the second side in the preset direction. Each handle is at least partially housed in one of the first grooves, and a gripping space for holding the handle is formed between each handle and one of the first grooves. One of the first grooves has an external signal input on its sidewall, and the external signal input is electrically connected to the circuit board assembly.

6. The mobile energy storage device according to claim 1, characterized in that, The battery has a rectangular structure and has two small facets extending along the width direction of the outer casing assembly, and the two small facets are arranged opposite to each other. The mobile energy storage device also includes a circuit board assembly disposed in the bottom shell. The circuit board assembly is disposed on one of the small facets of the battery and is electrically connected to the battery. The bottom shell has two second sidewalls extending along the length direction of the outer shell assembly. The two second sidewalls are arranged opposite to each other in the width direction of the outer shell assembly. One of the second sidewalls is provided with a first vent that extends through the width direction of the outer shell assembly, and the other second sidewall is provided with a second vent that extends through the width direction of the outer shell assembly. Both the first vent and the second vent correspond to the circuit board assembly.

7. The mobile energy storage device according to claim 6, characterized in that, Each of the second sidewalls is provided with a windproof rib located within the bottom shell. The windproof rib extends along the width direction of the outer shell assembly toward the circuit board assembly and / or the battery, and abuts against the surface of the circuit board assembly and / or the battery toward the second sidewall, or is located between the circuit board assembly and the battery.

8. The mobile energy storage device according to any one of claims 1-7, characterized in that, The top shell has a first abutment surface that abuts against the bottom shell at one end near the bottom shell, and the bottom shell has a second abutment surface that abuts against the first abutment surface at one end near the top shell. One of the first and second abutment surfaces is provided with a positioning groove, and the other of the first and second abutment surfaces is provided with a positioning protrusion, the positioning protrusion being embedded in the positioning groove; and / or, The first connecting post has a first end face facing the bottom shell, and the second connecting post has a second end face facing the top shell. One of the first end face of the first connecting post and the second end face of the second connecting post is provided with a limiting groove, and the other of the first connecting post and the second connecting post is embedded in the limiting groove.

9. The mobile energy storage device according to any one of claims 1-7, characterized in that, The top shell has a first stop surface that abuts against the bottom shell at one end near the bottom shell, and the bottom shell has a second stop surface that abuts against the first stop surface at one end near the top shell. The outer peripheral side of the bottom shell is provided with a second groove, which passes through the second stop surface. The mobile energy storage device also includes an elastic element, which is clamped to the groove wall of the second groove.

10. The mobile energy storage device according to claim 9, characterized in that, The outer peripheral side of the top shell and the first stop surface are provided with a first chamfer, and / or the outer peripheral side of the bottom shell and the groove wall of the second groove are provided with a second chamfer.

11. An energy storage system, characterized in that, The energy storage system has a mobile energy storage device as described in any one of claims 1-10.

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