Mobile energy storage device and energy storage system

Abstract

The utility model discloses a mobile energy storage device and an energy storage system, the mobile energy storage device comprises a battery, a shell assembly and a fastener, the shell assembly comprises a bottom shell and a top shell, the battery is arranged in the bottom shell, a first connecting column extending along the height direction of the shell assembly is arranged in the top shell, and a second connecting column extending along the height direction of the shell assembly is arranged in the top shell. The surface, facing the bottom shell, of the first connecting column is provided with a threaded connecting hole, the periphery of the first connecting column is provided with a first reinforcing rib, the first reinforcing rib extends in the height direction of the shell assembly to be connected with the top shell, the bottom shell is internally provided with a second connecting column extending in the height direction of the shell assembly, and the second connecting column is provided with a connecting through hole. The connecting through hole penetrates through the second connecting column and the bottom shell in the height direction of the shell assembly, a second reinforcing rib is arranged on the periphery of the second connecting column and extends to be connected with the bottom shell in the height direction of the shell assembly, and the fastener penetrates through the connecting through hole in the height direction of the shell assembly to be connected with the threaded connecting hole.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a mobile energy storage device and an energy storage system. Background Art

[0002] In recent years, energy storage products have been more and more widely used, and the demand for mobile energy storage devices has also been increasing. Due to its advantages such as small volume, light weight, and easy to move, mobile energy storage devices have been favored by more and more users.

[0003] In the related art, a mobile energy storage device usually includes a top shell, a bottom shell, a battery module and a control module fixed inside the bottom shell. In the related art, the top shell and the bottom shell are usually connected and fixed by a snap structure. However, the load-bearing capacity of the snap structure is generally weak. When lifting the mobile device by holding the handle on the top shell, the snap structure will be subjected to a large force, which easily causes the snap structure to be damaged and the bottom shell to be easily separated from the top shell. Furthermore, when lifting the mobile energy storage device, components such as the battery module and the inverter module are likely to fall, thus affecting the use of the mobile energy storage device. Summary of the Utility Model

[0004] Embodiments of the utility model disclose a mobile energy storage device and an energy storage system, which 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, enabling the top shell and the bottom shell to be firmly connected together, and further ensuring the use of the mobile energy storage device.

[0005] To achieve the above object, in a first aspect, the utility model discloses a mobile energy storage device, which comprises:

[0006] A battery;

[0007] An outer shell assembly, the outer shell assembly includes a bottom shell and a top shell connected to the bottom shell. The battery is arranged inside the bottom shell. A first connection column extending along the height direction of the outer shell assembly is arranged inside the top shell. A threaded connection hole is arranged on the surface of the first connection column facing the bottom shell. A first reinforcing rib is arranged on the outer peripheral surface of the first connection column. The first reinforcing rib extends along the height direction of the outer shell assembly to be connected to the top shell. A second connection column extending along the height direction of the outer shell assembly is arranged inside the bottom shell. A connection through hole is arranged on the second connection column. The connection through hole penetrates through the second connection column and the bottom shell along the height direction of the outer shell assembly. A second reinforcing rib is arranged on the outer peripheral surface of the second connection column. The second reinforcing rib extends along the height direction of the outer shell assembly to be connected to the bottom shell; and

[0008] A fastener that passes through the connection through-hole along the height direction of the housing assembly and is connected to the threaded connection hole to realize the connection between the bottom case and the top case.

[0009] In the mobile energy storage device provided in the present application, by forming a first connection post inside the top case to form a threaded connection hole and forming a second connection post inside the bottom case to form a connection through-hole, bolts, screws and other fasteners can be used to pass through the connection through-hole and be connected and fixed to the threaded connection hole. That is, the top case and the bottom case are connected and fixed by a threaded connection method, which can make the connection between the top case and the bottom case relatively firm; and it is convenient to install and disassemble, with strong practicability and easy operation. On this basis, the present application also provides a first reinforcing rib extending along the axial direction of the first connection post on the outer peripheral surface of the first connection post, and a second reinforcing rib extending along the axial direction of the second connection post on the outer peripheral surface of the second connection post, so that the structural strength of the first connection post can be enhanced by the first reinforcing rib, and the structural strength of the second connection post can be enhanced by the second reinforcing rib, so that both the first connection post and the second connection post can bear greater forces, thereby improving the load-bearing capacity of the first connection post and the second connection post, so that the top case and the bottom case can be firmly connected together to avoid the situation of the battery falling due to the bottom case detaching from the top case, and further ensuring the use of the mobile energy storage device.

[0010] In addition, since the first reinforcing rib extends along the height direction of the housing assembly to be connected to the top case, the first connection post can be connected to the top case not only through itself but also through the first reinforcing rib, thereby improving the stability of the first connection post on the top case and further improving the load-bearing capacity of the first connection post. Similarly, since the second reinforcing rib extends along the height direction of the housing assembly to be connected to the bottom case, the second connection post can be connected to the bottom case not only through itself but also through the second reinforcing rib, thereby improving the stability of the second connection post on the bottom case and further improving the load-bearing capacity of the second connection post; and by forming a first connection post inside the top case to form a threaded connection hole and forming a second connection post inside the bottom case to form a connection through-hole, compared with directly forming a threaded connection hole on the side wall of the top case and directly forming a connection through-hole on the side wall of the bottom case, the radial dimensions of the first connection post and the second connection post can be locally increased to form a threaded connection hole and a connection through-hole with larger radial dimensions, so that fasteners with larger radial dimensions can be used, and further ensure the connection stability between the top case and the bottom case, without increasing the wall thickness of the top case and the bottom case as a whole, thereby reducing the overall weight of the mobile energy storage device, facilitating lifting the mobile energy storage device, and thus facilitating the movement and handling of the mobile energy storage device.

[0011] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, there are multiple first reinforcing rib strips, and the multiple first reinforcing rib strips are arranged at intervals along the circumferential direction of the first connecting column, and at least one of the first reinforcing rib strips is connected to the side wall of the top shell; thereby further improving the stability of the first connecting column on the top shell, further improving the load-bearing capacity of the first connecting column, and further enabling the top shell and the bottom shell to be more firmly connected together, so as to avoid the situation of the battery falling due to the bottom shell detaching from the top shell, and to ensure the use of the mobile energy storage device.

[0012] And / or, there are multiple second reinforcing rib strips, and the multiple second reinforcing rib strips are arranged at intervals along the circumferential direction of the second connecting column, and at least one of the second reinforcing rib strips is connected to the side wall of the bottom shell. Thereby further improving the stability of the second connecting column on the bottom shell, further improving the load-bearing capacity of the second connecting column, and further enabling the top shell and the bottom shell to be more firmly connected together, so as to avoid the situation of the battery falling due to the bottom shell detaching from the top shell, and to ensure the use of the mobile energy storage device.

[0013] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, the first connecting column includes a first sub-connecting column and a second sub-connecting column, the top shell is a shell structure formed by enclosing multiple first side walls, adjacent two of the first side walls are angularly connected to form a first corner, each of the first corners is provided with a first sub-connecting column, and at least one of the first side walls is provided with the second sub-connecting column at a position between two adjacent first sub-connecting columns. The outer peripheral surface of the first sub-connecting column is connected to the first corner through the corresponding first reinforcing rib strip, or the outer peripheral surface of the first sub-connecting column is connected to both adjacent first side walls through the corresponding first reinforcing rib strip, and the outer peripheral surface of the second sub-connecting column is connected to the first side wall through the corresponding first reinforcing rib strip;

[0014] The second connecting column includes a third sub-connecting column and a fourth sub-connecting column, the bottom shell is a shell structure formed by enclosing multiple second side walls, adjacent two of the second side walls are angularly connected to form a second corner, each of the second corners is provided with a third sub-connecting column, and at least one of the second side walls is provided with the fourth sub-connecting column at a position between two adjacent third sub-connecting columns. The outer peripheral surface of the third sub-connecting column is connected to the second corner through the corresponding second reinforcing rib strip, or the outer peripheral surface of the third sub-connecting column is connected to both adjacent second side walls through the corresponding second reinforcing rib strip, and the outer peripheral surface of the fourth sub-connecting column is connected to the second side wall through the corresponding second reinforcing rib strip.

[0015] Adopting the above design solution can make the pulling force between the top shell and the bottom shell relatively uniform, which is beneficial to further improve the connection stability between the top shell and the bottom shell, so that the top shell and the bottom shell can be firmly connected together, avoiding the situation of the battery falling due to the bottom shell detaching from the top shell, improving the load-bearing capacity of the outer shell assembly, and further ensuring the use of the mobile energy storage device.

[0016] As an alternative implementation manner, in the embodiment of the first aspect of the present utility model, the top shell has a first side and a second side opposite to each other in a preset direction, and the mobile energy storage device further includes two handles, and the two handles are respectively connected to the top shell and are both located outside the top shell, and 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; wherein, the preset direction is configured as the length direction or the width direction of the top shell.

[0017] In this way, when moving the mobile energy storage device, the user's hand, clamping tool, etc. can hold the handle to lift the mobile energy storage device to move the mobile energy storage device to the target location, so that the movement of the mobile energy storage device is relatively convenient; at the same time, in this application, handles are provided on both sides (i.e., the first side and the second side) of the top shell, that is, a double-handle design is adopted in this application. When the user's hand holds the handle to lift the mobile energy storage device, one handle can be held by each hand to move the mobile energy storage device, or two people can move it together, and one person holds one handle to move the mobile energy storage device, so that the force can be dispersed, and thus it is convenient to move and carry the mobile energy storage device.

[0018] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, the mobile energy storage device further includes a circuit board assembly disposed in the bottom case. On the top surface of the top case facing away from the bottom case, there are two first grooves spaced apart from each other. One of the first grooves is located on the first side and penetrates the side surface of the first side in the preset direction, and the other first groove is located on the second side and penetrates the side surface of the second side in the preset direction. Each handle is at least partially received in one of the first grooves, and a holding space for holding the handle is formed between each handle and one of the first grooves. An external signal access port is provided on the groove side wall of one of the first grooves. The external signal access port is electrically connected to the circuit board assembly and is used to be electrically connected to intelligent terminals such as desktop computers, laptop computers, tablet computers or mobile phones. Thus, devices such as 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 can be projected onto the intelligent terminal. Furthermore, corresponding operations can be performed on the intelligent terminal to upgrade and repair the above devices, so that upgrading and device repair can be carried out without disassembling the mobile energy storage device. At the same time, by setting the external signal access port on the groove side wall of one of the first grooves, the setting position of the external signal access port is relatively concealed, so as to avoid affecting the appearance of the mobile energy storage device.

[0019] In addition, since the handle is at least partially received in the first groove, it is beneficial to make the structure of the mobile energy storage device more compact, thereby facilitating the miniaturized design of the mobile energy storage device.

[0020] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, the battery has a rectangular structure, and the battery has two small side surfaces extending along its width direction, and the two small side surfaces are oppositely arranged. The mobile energy storage device further includes a circuit board assembly disposed in the bottom case. The circuit board assembly is disposed on one of the small side surfaces of the battery and is electrically connected to the battery. Among them, the circuit board assembly can be fixedly connected to one of the small side surfaces of the battery, or it can be not fixedly connected to one of the small side surfaces of the battery, but only adjacent to and oppositely arranged with one of the small side surfaces of the battery. The bottom case has two second side walls extending in the length direction of the battery, and the two second side walls are oppositely arranged in the width direction of the battery. A first ventilation port penetrating along the width direction of the battery is provided on one of the second side walls, and a second ventilation port penetrating along the width direction of the battery is provided on the other second side wall. Both the first ventilation port and the second ventilation port are arranged corresponding to the circuit board assembly.

[0021] With such a design, it is possible to utilize the first ventilation opening and the second ventilation opening to form a thermal convection, causing the gas around the circuit board assembly to flow, thereby taking away the heat of the circuit board assembly, so as to achieve heat dissipation and temperature reduction of the circuit board assembly, prevent the circuit from overheating and causing overload or malfunction, and further contribute to ensuring the normal operation of the circuit board assembly and improving the use safety of the mobile energy storage device.

[0022] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, each of the second side walls is convexly provided with a wind blocking rib located inside the bottom case, and each of the wind blocking ribs extends along the width direction of the battery towards the circuit board assembly and / or the battery, so as to abut against the surface of the circuit board assembly and / or the battery facing the second side wall, or to be located between the circuit board assembly and the battery. In this way, not only can the wind blocking ribs be used to block the hot air flowing through the circuit board assembly from flowing into the battery, thereby avoiding the battery operating in a high-temperature environment, and further ensuring a stable working state of the battery and improving its working reliability and stability; at the same time, the wind blocking ribs can also be used to enhance the structural strength of the bottom case.

[0023] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, one end of the top case close to the bottom case has a first abutting surface abutting against the bottom case, one end of the bottom case close to the top case has a second abutting surface abutting against the first abutting surface, and one of the first abutting surface and the second abutting surface is provided with a positioning groove, and the other of the first abutting surface and the second abutting surface is provided with a positioning protrusion, and the positioning protrusion is embedded in the positioning groove; and / or, the first connecting column has a first end surface facing the bottom case, the second connecting column has a second end surface facing the top case, and one of the first end surface of the first connecting column and the second end surface of the second connecting column is provided with a limiting groove, and the other of the first connecting column and the second connecting column is embedded in the limiting groove.

[0024] In this way, when assembling the top case to the bottom case, the cooperation of the positioning protrusion and the positioning groove can be used to position and limit the assembly between the top case and the bottom case, and the cooperation of the first connecting column or the second connecting column and the limiting groove can also be used to position and limit the assembly between the top case and the bottom case, which can achieve a double positioning and limiting effect, so as to effectively ensure that the threaded connection hole and the connection through hole can be coaxially arranged, thus facilitating the fastener to pass through the connection through hole and connect with the threaded connection hole.

[0025] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, one end of the top shell close to the bottom shell has a first abutting surface abutting against the bottom shell, one end of the bottom shell close to the top shell has a second abutting surface abutting against the first abutting surface, and a second groove is provided on the outer peripheral side surface of the bottom shell, and the second groove penetrates through the second abutting surface; the mobile energy storage device further includes an elastic member, and the elastic member is hoop-shaped on the wall surface of the second groove, that is, the elastic member can be elastically bundled on the wall surface of the second groove of the bottom shell. Since the elastic member has elasticity and can be pulled out or pulled back, the elastic member can be used as a clamping member to temporarily clamp some small objects such as sticky notes, etc., and has a certain temporary fixing and clamping effect.

[0026] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, a first chamfer is provided at the connection between the outer peripheral side surface of the top shell and the first abutting surface, and / or a second chamfer is provided at the connection between the outer peripheral side surface of the bottom shell and the wall surface of the second groove. The presence of the first chamfer and the second chamfer can prevent the formation of sharp corners at the connection between the outer peripheral side surface of the top shell and the first abutting surface, and at the connection between the outer peripheral side surface of the bottom shell and the wall surface of the second groove, thereby avoiding the sharp corners from piercing, cutting, and damaging the elastic member, and further reducing the risk of the elastic member being pierced and cut, so as to ensure the sealing performance of the sealing ring; at the same time, when the mobile energy storage device in this application is placed outdoors and it rains, the rainwater will flow from the outer peripheral side surface of the top shell along the direction towards the bottom shell under the action of its gravity, and when the rainwater drips to the second chamfer, the second chamfer can be used to guide the rainwater to flow to the outer peripheral side surface of the bottom shell, so that the rainwater continues to flow downward along the outer peripheral side surface of the bottom shell, so as to further improve the waterproof performance of the housing assembly.

[0027] As an alternative embodiment, in the embodiment of the first aspect of the present utility model, anti-slip foot pads are provided on the bottom surface of the bottom shell facing away from the top shell, so that the anti-slip foot pads can increase the friction of the bottom surface of the bottom shell, prevent the mobile energy storage device from slipping, and play a role of gripping and anti-slip.

[0028] In the second aspect, the present utility model discloses an energy storage system, and the energy storage system has the mobile energy storage device as described in the above first aspect. The energy storage system having the mobile energy storage device as described in the above first aspect can also 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 firmly connected together, and further ensuring the use of the mobile energy storage device.

[0029] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0030] The mobile energy storage device and energy storage system provided by the embodiments of the present utility model form a first connection column inside the top shell to form a threaded connection hole, and form a second connection column inside the bottom shell to form a connection through hole. Thus, fasteners such as bolts and screws can be used to pass through the connection through hole and be connected and fixed to the threaded connection hole, that is, the top shell and the bottom shell are connected and fixed by a threaded connection method, which can make the connection between the top shell and the bottom shell relatively firm; moreover, the installation is convenient, and it is also easy to disassemble, with strong practicability and convenient operation. On this basis, the present application also provides a first reinforcing rib extending along the axial direction of the first connection column on the outer peripheral surface of the first connection column, and a second reinforcing rib extending along the axial direction of the second connection column on the outer peripheral surface of the second connection column. Thus, the structural strength of the first connection column can be enhanced by the first reinforcing rib, and the structural strength of the second connection column can be enhanced by the second reinforcing rib, so that both the first connection column and the second connection column can withstand greater forces, thereby improving the load-bearing capacity of the first connection column and the second connection column, enabling the top shell and the bottom shell to be firmly connected together, avoiding the situation where the battery drops due to the bottom shell detaching from the top shell, and further ensuring the use of the mobile energy storage device.

[0031] In addition, since the first reinforcing rib extends along the height direction of the outer shell assembly to be connected to the top shell, the first connection column can be connected to the top shell not only through itself but also through the first reinforcing rib, thereby improving the stability of the first connection column on the top shell and further enhancing the load-bearing capacity of the first connection column. Similarly, since the second reinforcing rib extends along the height direction of the outer shell assembly to be connected to the bottom shell, the second connection column can be connected to the bottom shell not only through itself but also through the second reinforcing rib, thereby improving the stability of the second connection column on the bottom shell and further enhancing the load-bearing capacity of the second connection column; moreover, by forming a first connection column inside the top shell to form a threaded connection hole and forming a second connection column inside the bottom shell to form a connection through hole, compared with directly forming a threaded connection hole on the side wall of the top shell and directly forming a connection through hole on the side wall of the bottom shell, the radial dimensions of the first connection column and the second connection column can be locally increased to form a threaded connection hole and a connection through hole with larger radial dimensions, so that fasteners with larger radial dimensions can be used, further ensuring the connection stability between the top shell and the bottom shell, without increasing the wall thickness of the top shell and the bottom shell as a whole, thus reducing the overall weight of the mobile energy storage device, facilitating the lifting of the mobile energy storage device, and thus facilitating the movement and handling of the mobile energy storage device. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the attached drawings required for use in the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these attached drawings.

[0033] Figure 1 is a schematic structural diagram of the first mobile energy storage device disclosed in the embodiments of the present utility model;

[0034] Figure 2 is a schematic structural diagram of the second mobile energy storage device disclosed in the embodiments of the present utility model;

[0035] Figure 3 is a first exploded structural diagram of the second mobile energy storage device disclosed in the embodiments of the present utility model;

[0036] Figure 4 is a second exploded structural diagram of the second mobile energy storage device disclosed in the embodiments of the present utility model;

[0037] Figure 5 is a schematic structural diagram of the top shell in the first perspective disclosed in the embodiments of the present utility model;

[0038] Figure 6 is a schematic structural diagram of the first bottom shell in the first perspective disclosed in the embodiments of the present utility model;

[0039] Figure 7 is a schematic structural diagram of the top shell in the second perspective disclosed in the embodiments of the present utility model;

[0040] Figure 8 is a schematic structural diagram of the first bottom shell in the second perspective disclosed in the embodiments of the present utility model;

[0041] Figure 9 is Figure 8 a partial enlarged view of M in

[0042] Figure 10 is a schematic structural diagram of the housing assembly disclosed in the embodiments of the present utility model;

[0043] Figure 11 Figure 10 a cross-sectional view of the housing assembly along the A-A direction in

[0044] Figure 12 is Figure 11 a partial enlarged view of N in

[0045] Figure 13 is Figure 12 an exploded structural diagram of

[0046] Figure 14 It is a schematic structural diagram of a battery and a circuit board assembly disclosed in an embodiment of the present utility model;

[0047] Figure 15 It is an exploded structural schematic diagram of a circuit board assembly disclosed in an embodiment of the present utility model;

[0048] Figure 16 It is a schematic structural diagram of a second bottom case disclosed in an embodiment of the present utility model.

[0049] Main reference numeral description

[0050] 100 - Mobile energy storage device; 11 - Battery; 12 - Circuit board assembly; 121 - Protective case; 121a - First side; 121b - Second side; 1211 - Third ventilation opening; 1212 - Fourth ventilation opening; 1213 - Fan; 122 - Circuit board; 13 - Outer shell assembly; 131 - Top case; 131a - First corner; 131b - First side wall; 131c - First side; 131d - Second side; 131e - First abutting surface; 131e1 - Positioning groove; 131f - First chamfer; 1311 - First connecting column; 1311a - Threaded connection hole; 1311b - First end face; 1311c - First sub - connecting column; 1311d - Second sub - connecting column; 1312 - First reinforcing rib; 1313 - First groove; 1314 - External signal access port; 132 - Bottom case; 132a - Second corner; 132b - Second side wall; 132e - Second abutting surface; 132e1 - Positioning protrusion; 132f - Second groove; 132g - Second chamfer; 1321 - Second connecting column; 1321a - Connection through - hole; 1321b - Second end face; 1321c - Limiting groove; 1321d - Third sub - connecting column; 1321e - Fourth sub - connecting column; 1322 - Second reinforcing rib; 1323 - Reinforcing rib; 1323a - Sub - reinforcing rib; 1324 - First ventilation opening; 1325 - Second ventilation opening; 1326 - Wind - blocking rib; 14 - Fastener; 15 - Anti - slip foot pad; 16 - Handle; 17 - Limiting and strengthening structure; 171 - Rib; 172 - Abutting plate; 18 - Elastic member;

[0051] f1 - Height direction; f2 - Width direction; f3 - Length direction. Detailed implementation manners

[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0054] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, the first connecting post may be referred to as the second connecting post, and similarly, the second connecting post may be referred to as the first connecting post. Both the first connecting post and the second connecting post are connecting posts, but they are not the same connecting post.

[0055] It can be understood that for "connection" in the following embodiments, if there is transmission of electrical signals or data between the connected circuits, modules, units, etc., it should be understood as "electrical connection", "communication connection", etc.

[0056] As used herein, the singular forms "a", "an", and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0057] In the related art, a mobile energy storage device generally includes a top shell, a bottom shell, a battery module and a control module fixed inside the bottom shell, and the top shell and the bottom shell in the related art are usually connected and fixed by means of a snap structure. However, the load-bearing capacity of the snap structure is generally weak. At the same time, since the battery module and the control module are fixed on the bottom shell, the weight of the mobile device is concentrated on the bottom shell. When the mobile device is lifted by holding the handle on the top shell, the snap structure will be subjected to a large force, which easily causes the snap structure to be damaged and the bottom shell to be easily separated from the top shell. Furthermore, when lifting the mobile energy storage device, components such as the battery module and the inverter module are likely to fall, thus affecting the use of the mobile energy storage device.

[0058] Based on this, this application provides a mobile energy storage device and an energy storage system that can improve the load-bearing capacity of the connection structure between the top shell and the bottom shell.

[0059] The technical solution of this application will be further described in detail below with reference to the accompanying drawings.

[0060] Please refer to Figures 1 to 4 , an embodiment of the present utility model discloses a mobile energy storage device. The mobile energy storage device 100 includes a battery 11, a circuit board assembly 12, a housing assembly 13, and a fastener 14.

[0061] The housing assembly 13 has a height direction f1, a width direction f2, and a length direction f3. The housing assembly 13 includes a bottom shell 132 and a top shell 131 connected to the bottom shell 132. Among them, the battery 11 and the circuit board assembly 12 are both disposed in 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.

[0062] Combined with Figures 4 to 6 As shown, inside the top shell 131 of the present application, there is a first connecting column 1311 extending along the height direction f1 of the housing assembly 13. The surface of the first connecting column 1311 facing the bottom shell 132 is provided with a threaded connection hole 1311a, and the outer peripheral surface of the first connecting column 1311 is provided with a first reinforcing rib 1312. Inside the bottom shell 132, there is a second connecting column 1321 extending along the height direction f1 of the housing assembly 13. The second connecting column 1321 is provided with a connection through hole 1321a. The connection through hole 1321a penetrates through the second connecting column 1321 and the bottom shell 132 along the height direction f1 of the housing assembly 13. The outer peripheral surface of the second connecting column 1321 is provided with a second reinforcing rib 1322. Fasteners 14 such as bolts and screws pass through the connection through hole 1321a along the height direction of the housing assembly 13 and are connected to the threaded connection hole 1311a to realize the connection between the bottom shell 132 and the top shell 131.

[0063] In this application, a first connecting post 1311 is formed inside the top shell 131 to form a threaded connection hole 1311a, and a second connecting post 1321 is formed inside the bottom shell 132 to form a connection through hole 1321a. Thus, fasteners 14 such as bolts and screws can pass through the connection through hole 1321a and be connected and fixed to the threaded connection hole 1311a. That is, the top shell 131 and the bottom shell 132 are connected and fixed by a threaded connection method, which can make the connection between the top shell 131 and the bottom shell 132 relatively firm; moreover, the installation is convenient, and the disassembly of the two is also convenient, with strong practicability and easy operation. On this basis, in this application, a first reinforcing rib 1312 extending along the axial direction of the first connecting post 1311 is provided on the outer peripheral surface of the first connecting post 1311, and a second reinforcing rib 1322 extending along the axial direction of the second connecting post 1321 is provided on the outer peripheral surface of the second connecting post 1321. Thus, the structural strength of the first connecting post 1311 can be enhanced by the first reinforcing rib 1312, and the structural strength of the second connecting post 1321 can be enhanced by the second reinforcing rib. 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, so that the top shell 131 and the bottom shell 132 can be stably connected together, avoiding the situation where the battery 11 and the circuit board assembly 12 fall due to the bottom shell 132 detaching from the top shell 131, and further ensuring the use of the mobile energy storage device 100.

[0064] In addition, by adopting the method of forming a first connecting post 1311 inside the top shell 131 to form a threaded connection hole 1311a and forming a second connecting post 1321 inside the bottom shell 132 to form a connection through hole 1321a, compared with directly forming a threaded connection hole 1311a on the side wall of the top shell 131 and directly forming a connection through hole 1321a 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 a threaded connection hole 1311a and a connection through hole 1321a with larger radial dimensions. Thus, fasteners 14 with larger radial dimensions can be used, and further, the connection stability between the top shell 131 and the bottom shell 132 can be ensured without increasing the wall thickness of the top shell 131 and the bottom shell as a whole, thereby reducing the overall weight of the mobile energy storage device 100, facilitating the lifting of the mobile energy storage device 100, and thus facilitating the movement, handling, etc. of the mobile energy storage device 100.

[0065] Meanwhile, since the fastener 14 passes through the connection through-hole 1321a and is connected to the threaded connection hole 1311a from the bottom surface of the bottom case 132 facing away from the top case 131, that is, the nut of the fastener 14 is located on the bottom surface side of the bottom case 132, and there are no holes on the top surface of the top case 131. At the same time, when the mobile energy storage device 100 is placed on a placement plane such as a tabletop, a countertop or the ground, generally the bottom surface of the bottom case 132 contacts the placement plane, and the top surface of the top case 131 is exposed to the environment. Therefore, adopting the above fixing method between the top case 131 and the bottom case 132 can also prevent liquids such as rainwater from entering the interior of the housing assembly 13 through the holes on the top surface of the top case 131, which is beneficial to improving the waterproof performance of the housing assembly 13.

[0066] In the present application, the first reinforcing rib 1312 can extend along the height direction f1 of the housing assembly 13 to be connected to the top case 131. In this way, the first connection column 1311 can be connected to the top case 131 not only through itself but also through the first reinforcing rib 1312, thereby improving the stability of the first connection column 1311 on the top case 131 and further improving the load-bearing capacity of the first connection column 1311. Similarly, the second reinforcing rib 1322 can extend along the height direction f1 of the housing assembly 13 to be connected to the bottom case 132, so that the second connection column 1321 can be connected to the bottom case 132 not only through itself but also through the second reinforcing rib 1322, thereby improving the stability of the second connection column 1321 on the bottom case 132 and further improving the load-bearing capacity of the second connection column 1321.

[0067] Optionally, there can be multiple first reinforcing ribs 1312, and the multiple first reinforcing ribs 1312 are arranged at intervals along the circumferential direction of the first connection column 1311, and at least one first reinforcing rib 1312 is connected to the side wall of the top case 131. Thereby, the structural stability of the first connection column 1311 can be further improved, and thus the load-bearing capacity of the first connection column 1311 can be further improved. Furthermore, the top case 131 and the bottom case 132 can be more firmly connected together to avoid the situation where the battery 11 drops due to the bottom case 132 detaching from the top case 131, so as to ensure the use of the mobile energy storage device 100.

[0068] Similarly, there can also be multiple second reinforcing ribs 1322, and the multiple second reinforcing ribs 1322 are arranged at intervals along the circumferential direction of the second connection column 1321, and at least one second reinforcing rib 1322 is connected to the side wall of the bottom case 132. Thereby, the structural stability of the second connection column 1321 can be further improved, and thus the load-bearing capacity of the second connection column 1321 can be further improved. Furthermore, the top case 131 and the bottom case 132 can be more firmly connected together to avoid the situation where the battery 11 drops due to the bottom case 132 detaching from the top case 131, so as to ensure the use of the mobile energy storage device 100.

[0069] In the present application, the battery 11 may include one or more battery cells, and the battery cell may be of a rectangular structure. Each rectangular battery cell has two large side faces opposite to each other in the width direction f2 of the housing assembly, and two small side faces opposite to each other in the length direction f3 of the housing assembly. When the battery 11 includes a plurality of battery cells, such as two, three, four, five, six or more, the plurality of battery cells are arranged in sequence in the width direction f2 of the housing assembly 13, and the large faces of the plurality of battery cells are stacked and arranged in sequence in the width direction f2 of the housing assembly 13. The plurality of battery cells are connected in series or in parallel with each other.

[0070] In some alternative embodiments, the first connection post 1311 includes a first sub-connection post 1311c and a second sub-connection post 1311d. The top case 131 is a housing structure formed by enclosing a plurality of first side walls 131b. Two adjacent first side walls 131b are angularly connected to form a first corner 131a. A first sub-connection post 1311c is provided at each first corner at the first side wall 131b, and a second sub-connection post 1311d is provided at least at a position of one first side wall 131b between two adjacent first sub-connection posts 1311c. The outer peripheral surface of the first sub-connection 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-connection post 1311c is connected to both adjacent first side walls 131b through a corresponding first reinforcing rib 1312. The outer peripheral surface of the second sub-connection post 1311d is connected to the first side wall 131b through a corresponding first reinforcing rib 1312.

[0071] Correspondingly, the second connection post 1321 includes a third sub-connection post 1321d and a fourth sub-connection post 1321e. The bottom case 132 is a housing structure formed by enclosing a plurality of second side walls 132b. Two adjacent second side walls 132b are angularly connected to form a second corner 132a. A third sub-connection post 1321d is provided at each second corner 132a, and a fourth sub-connection post 1321e is provided at least at a position of one second side wall 132b between two adjacent third sub-connection posts 1321d. The outer peripheral surface of the third sub-connection 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-connection 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-connection post 1321e is connected to the second side wall 132b through a corresponding second reinforcing rib 1322.

[0072] Through the above design, the pulling force between the top shell 131 and the bottom shell 132 can be made relatively uniform, which is conducive to further improving 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, avoiding the situation where the battery 11 and the circuit board assembly 12 fall due to the separation of the bottom shell 132 from the top shell 131, improving the load-bearing capacity of the housing assembly 13, and thus ensuring the use of the mobile energy storage device 100.

[0073] Exemplarily, as Figures 4 to 6 shown, the top shell 131 can be a rectangular housing, which has four first side walls 131b and four first corners 131a. Two of the first side walls 131b extend along the length direction f3 respectively, and two of the first side walls 131b are oppositely arranged in the width direction f2. The other two first side walls 131b extend along the width direction f2 respectively, and the other two first side walls 131b are oppositely arranged in the length direction f3. A first sub-connecting post 1311c is provided at each first corner 131a, and two second sub-connecting posts 1311d are provided at the positions of two adjacent first sub-connecting posts 1311c on the two first side walls 131b that are oppositely arranged in the width direction f2. In this way, at least six first connecting posts 1311 are arranged inside the top shell 131.

[0074] Correspondingly, the bottom shell 132 can be a rectangular housing, which has four second side walls 132b and four second corners 132a. Two of the second side walls 132b extend along the length direction f3 respectively, and two of the second side walls 132b are oppositely arranged in the width direction f2. The other two second side walls 132b extend along the width direction f2 respectively, and the other two second side walls 132b are oppositely arranged in the length direction f3. A third sub-connecting post 1321d is provided at each second corner 132a, and two fourth sub-connecting posts 1321e are provided at the positions of two adjacent third sub-connecting posts 1321d on the two second side walls 132b that are oppositely arranged in the width direction f2. Then, at least six second connecting posts 1321 are arranged inside the bottom shell 132.

[0075] Correspondingly, the mobile energy storage device 100 can include at least six fasteners 14. Each fastener 14 is connected to a threaded connection hole 1311a through a connection through hole 1321a. With such a design, the pulling force between the top shell 131 and the bottom shell 132 can be made relatively uniform, which is conducive to further improving 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, avoiding the situation where the battery 11 and the circuit board assembly 12 fall due to the separation of the bottom shell 132 from the top shell 131, improving the load-bearing capacity of the housing assembly 13, and thus ensuring the use of the mobile energy storage device 100.

[0076] In some alternative embodiments, anti-slip pads 15 are provided on the bottom surface of the bottom case 132 facing away from the top case 131. In this way, the anti-slip pads can increase the friction of the bottom surface of the bottom case 132, prevent the mobile energy storage device 100 from slipping, and play a role in gripping and anti-slip.

[0077] Exemplarily, anti-slip pads 15 are provided at the four second corners 132a of the bottom case 132, and the material of the anti-slip pads can be silicone, rubber, plastic, etc.

[0078] In some alternative embodiments, as Figure 7 shown, the top case 131 has a first side 131c and a second side 131d opposite to each other in a preset direction. The mobile energy storage device further includes two handles 16. The two handles 16 are respectively connected to the top case 131 and are both located outside the top case 131. One of the handles 16 is located on the first side 131c of the top case 131, and the other handle 16 is located on the second side 131d of the top case 131. Among them, the preset direction is configured as the length direction f3 or the width direction f2 of the housing assembly case. In this way, when moving the mobile energy storage device, the user's hand, clamping tool, etc. can hold the handle 16 to lift the mobile energy storage device, so as to move the mobile energy storage device to the target location. In this way, the movement of the mobile energy storage device is relatively convenient; at the same time, the present application adopts the design of two handles 16 on both sides of the top case 131 (that is, the first side 131c and the second side 131d). When the user's hand holds the handle to lift the mobile energy storage device, the user can hold one handle 16 with both hands to move the mobile energy storage device, or two people can move it together, and one person holds one handle 16 to move the mobile energy storage device, so as to achieve the dispersion of force, and then facilitate the movement and handling of the mobile energy storage device.

[0079] In some alternative embodiments, the top shell 131 has two first grooves 1313 spaced apart on the top surface facing away from the bottom shell 132. One of the first grooves 1313 is located on the first side 131c of the top shell 131 and penetrates the side surface of the first side 131c in a preset direction. The other first groove 1313 is located on the second side 131d of the top shell 131 and penetrates the side surface of the second side 131d in a preset direction. Each handle 16 is at least partially received in a first groove 1313, and a holding space is formed between each handle 16 and a first groove 1313 for a user's hand to reach in and hold the handle 16. An external signal access port 1314 is provided on the groove side wall of one of the first grooves 1313. The external signal access port 1314 is electrically connected to the circuit board assembly 12. The external signal access port 1314 is used to be electrically connected to intelligent terminals such as desktop computers, laptop computers, tablet computers, or mobile phones, so that devices such as a power conversion system or an inverter, a battery management system, a controller, and safety devices (such as fire extinguishers, sensors, and alarms) in the circuit board assembly 12 can be projected onto the intelligent terminal. Furthermore, corresponding operations can be performed on the intelligent terminal to upgrade and repair the above devices, so that upgrades and device repairs can be carried out without disassembling the mobile energy storage device. At the same time, the external signal access port 1314 is arranged on the groove side wall of one of the first grooves 1313, making the installation position of the external signal access port 1314 relatively concealed to avoid affecting the appearance of the top shell 131.

[0080] In addition, since the handle 16 is at least partially received in the first groove 1313, it is beneficial to make the structure of the mobile energy storage device more compact, thus facilitating the realization of the miniaturized design of the mobile energy storage device.

[0081] Optionally, the external signal access port 1314 can be, but is not limited to, a High Definition Multimedia Interface (HDMI) interface, a Video Graphics Array (VGA) interface, a Digital Visual Interface (DVI) interface, a Mobile Industry Processor Interface (MIPI) interface, etc.

[0082] In some alternative embodiments, such as Figure 8 and Figure 9As shown, the mobile energy storage device further includes a limiting and strengthening structure 17 disposed within the bottom case 132. The limiting and strengthening structure 17 includes two ribs 171 spaced circumferentially along the bottom case 132 and a stop plate 172 connected between the two ribs 171. Each rib 171 is connected to the inner sidewall of the bottom case 132 and also to the inner bottom surface of the bottom case 132. The stop plate 172 is spaced from the inner sidewall of the bottom case 132, and the stop plate 172 and the two ribs 171 are both in contact with the circuit board assembly 12 to limit the position of the circuit board assembly 12 within the bottom case 132, preventing the circuit board assembly 12 from shaking or moving along the length direction f3 and / or the width direction f2, thereby avoiding collision with the circuit board assembly 12, protecting the circuit board assembly 12, and at the same time, the ribs 171 can strengthen the structural strength of the bottom case 132, improving the load-bearing capacity of the bottom case 132 so that the bottom case 132 can better accommodate the battery and the circuit board assembly.

[0083] In the above design, since both the stop plate 172 and the two ribs 171 are in contact with the circuit board assembly 12, compared with the method where only the two ribs 171 are in contact with the circuit board assembly 12, it can increase the contact area between the limiting and strengthening structure 17 and the circuit board assembly 12, improving the limiting effect of the limiting and strengthening structure 17 on the circuit board assembly 12. Additionally, in this application, the stop plate 172 is not only connected to the two ribs 171 but also to the inner bottom surface of the bottom case 132. When the stop plate 172 is in contact with the circuit board assembly 12, the two ribs 171 and the inner bottom surface of the bottom case 132 can support the stop plate 172, providing a supporting force for the stop plate 172 so that the stop plate 172 is not easily crushed when being contacted by the circuit board assembly 12. Further, since the stop plate 172 is spaced from the inner sidewall of the bottom case 132, this is beneficial for reducing the use of materials and the weight of the bottom case 132, thereby reducing costs and achieving a lightweight design.

[0084] Exemplarily, at least one side of the bottom case 132 in the length direction f3 is provided with the aforementioned limiting and strengthening structure 17. At this time, both the two ribs and the abutting plate of the limiting and strengthening structure 17 are in contact with the circuit board assembly 12 to limit the shaking or movement of the circuit board assembly in the length direction f3. Another exemplarily, at least one side of the bottom case 132 in the width direction f2 is provided with the aforementioned limiting and strengthening structure 17. At this time, both the two ribs and the abutting plate of the limiting and strengthening structure 17 are in contact with the circuit board assembly to limit the shaking or movement of the battery in the width direction f2. Yet another exemplarily, at least one side of the bottom case 132 in the length direction f3 is provided with the aforementioned limiting and strengthening structure 17. At this time, both the two ribs and the abutting plate of the limiting and strengthening structure 17 are in contact with the circuit board assembly to limit the shaking or movement of the battery in the length direction f3. Meanwhile, at least one side of the bottom case 132 in the width direction f2 is provided with the aforementioned limiting and strengthening structure 17. At this time, both the two ribs and the abutting plate of the limiting and strengthening structure 17 are in contact with the circuit board assembly to limit the shaking or movement of the circuit board assembly in the width direction f2.

[0085] In some alternative embodiments, the second side wall 132b of the bottom case 132 is convexly provided with reinforcing ribs 1323. For example, the two second side walls 132b oppositely arranged in the length direction f3 are convexly provided with reinforcing ribs 1323, so that the structural strength of the bottom case 132 can be further increased by using the reinforcing ribs 1323, thereby further improving the load-bearing capacity of the bottom case 132, enabling the bottom case 132 to better load the battery and the circuit board assembly, and at the same time, reducing the degree of deformation of the bottom case 132 when it is externally squeezed, or preventing the bottom case 132 from deforming, so as to protect the battery from being squeezed when the bottom case 132 is externally squeezed.

[0086] Further, the reinforcing rib 1323 may include a plurality of sub-reinforcing ribs 1323a arranged at circumferential intervals along the bottom case 132, and each sub-reinforcing rib 1323a extends along the height direction f1 of the bottom case 132; both the two ribs 171 are located between two adjacent sub-reinforcing ribs 1323a, or at least one of the two ribs 171 is connected to the sub-reinforcing rib 1323a in the height direction f1 of the bottom case 132, and the height by which the rib 171 protrudes relative to the second side wall 132b of the bottom case 132 is greater than the height by which the sub-reinforcing rib 1323a protrudes relative to the second side wall 132b of the bottom case 132, so that when the abutting plate 172 abuts against the circuit board assembly, the sub-reinforcing rib 1323a is arranged at an interval from the circuit board assembly. By making the height by which the rib 171 protrudes relative to the second side wall 132b of the bottom case 132 greater than the height by which the sub-reinforcing rib 1323a protrudes relative to the second side wall 132b of the bottom case 132, when the circuit board assembly is inserted into the bottom case 132 from the installation opening of the bottom case 132, it is possible to prevent the sub-reinforcing rib 1323a from blocking or hitting the circuit board assembly, thereby avoiding damage to the circuit board assembly and also facilitating the insertion of the battery into the bottom case 132.

[0087] As an alternative embodiment, in combination with Figures 10 to 13 As shown, one end of the top case 131 close to the bottom case 132 has a first abutting surface 131e abutting against the bottom case 132, one end of the bottom case 132 close to the top case 131 has a second abutting surface 132e abutting against the first abutting surface 131e, and a positioning groove 131e1 is provided on one of the first abutting surface 131e and the second abutting surface 132e, and a positioning protrusion 132e1 is provided on the other of the first abutting surface 131e and the second abutting surface 132e, that is, when the first abutting surface 131e is provided with the positioning groove 131e1, the second abutting surface 132e is provided with the positioning protrusion 132e1, and when the first abutting surface 131e is provided with the positioning protrusion 132e1, the second abutting surface 132e is provided with the positioning groove 131e1, wherein the positioning protrusion 132e1 is embedded in the positioning groove 131e1. Thus, when assembling the top case 131 to the bottom case 132, the cooperation of the positioning protrusion 132e1 and the positioning groove 131e1 can play a role in positioning and limiting the assembly between the top case 131 and the bottom case 132 to ensure that the threaded connection hole 1311a and the connection through hole 1321a can be coaxially arranged, thereby facilitating the fastener 14 to pass through the connection through hole 1321a and be connected to the threaded connection hole 1311a.

[0088] As another alternative embodiment, in combination with Figures 10 to 13As shown, 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 cooperation between the first connecting post 1311 or the second connecting post 1321 and the limiting groove 1321c 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 coaxially arranged, thereby facilitating the fastener 14 to pass through the connection through hole 1321a and connect with the threaded connection hole 1311a.

[0089] As another alternative embodiment, in combination with Figures 10 to 13As shown, one end of the top shell 131 close to the bottom shell 132 has a first abutting surface 131e abutting against the bottom shell 132, and one end of the bottom shell 132 close to the top shell 131 has a second abutting surface 132e abutting against the first abutting surface 131e. One of the first abutting surface 131e and the second abutting surface 132e is provided with a positioning groove 131e1, and the other of the first abutting surface 131e and the second abutting surface 132e is provided with a positioning protrusion 132e1, and the positioning protrusion 132e1 is embedded in the positioning groove 131e1. Moreover, the first connecting column 1311 has a first end face 1311b facing the bottom shell 132, and the second connecting column 1321 has a second end face 1321b facing the top shell 131. One of the first end face 1311b of the first connecting column 1311 and the second end face 1321b of the second connecting column 1321 is provided with a limiting groove 1321c, and the other of the first connecting column 1311 and the second connecting column 1321 is embedded in the limiting groove 1321c. In this way, when assembling the top shell 131 to the bottom shell 132, the cooperation of the positioning protrusion 132e1 and the positioning groove 131e1 can play a role in positioning and limiting the assembly between the top shell 131 and the bottom shell 132, and the cooperation of the first connecting column 1311 or the second connecting column 1321 and the limiting groove 131e1 can also play a role in positioning and limiting the assembly between the top shell 131 and the bottom shell 132, achieving a double positioning and limiting effect, thereby effectively ensuring that the threaded connection hole 1311a and the connection through hole 1321a can be coaxially arranged, facilitating the fastener 14 to pass through the connection through hole 1321a to be connected with the threaded connection hole 1311a.

[0090] In some alternative embodiments, one end of the top shell 131 close to the bottom shell 132 has a first abutting surface 131e abutting against the bottom shell 132, and one end of the bottom shell 132 close to the top shell 131 has a second abutting surface 132e abutting against the first abutting surface 131e. The outer peripheral side surface of the bottom shell 132 is provided with a second groove 132f, and the second groove 132f penetrates through the second abutting surface 132e. The mobile energy storage device 100 further includes an elastic member 18, and the elastic member 18 is arranged on the groove wall surface of the second groove 132f, that is, the elastic member 18 can be elastically bundled on the groove wall surface of the second groove 132f of the bottom shell 132. Since the elastic member 18 has elasticity and can be pulled out or pulled back, the elastic member 18 can be used as a clamping member to temporarily clamp some small objects such as sticky notes, etc., having a certain temporary fixing and clamping effect.

[0091] Optionally, the elastic member 18 can be a sealing ring such as a silica gel ring, a rubber ring, a plastic ring or a foam ring, or a sealant, etc.

[0092] In some alternative embodiments, a first chamfer 131f is provided at the connection between the outer peripheral side surface of the top case 131 and the first abutting surface 131e, and / or a second chamfer 132g is provided at the connection between the outer peripheral side surface of the bottom case 132 and the wall surface of the second groove 132f. Among them, both the first chamfer 131f and the second chamfer 132g can be an inclined chamfer or a rounded chamfer. The existence of the inclined chamfer or the rounded chamfer can prevent sharp corners from being formed at the connection between the outer peripheral side surface of the top case 131 and the first abutting surface 131e, and at the connection between the outer peripheral side surface of the bottom case 132 and the wall surface of the second groove 132f, thereby avoiding the sharp corners from piercing, cutting, and damaging the elastic member 18, and further reducing the risk of the elastic member 18 being pierced and cut to ensure the sealing performance of the sealing ring. At the same time, when the mobile energy storage device 100 in the present application is placed outdoors and it rains, the rainwater will flow along the outer peripheral side surface of the top case 131 towards the bottom case 132 under the action of its gravity. When the rainwater drops to the second chamfer 132g, the second chamfer 132g can guide the rainwater to flow to the outer peripheral side surface of the bottom case 132, so that the rainwater continues to flow downward along the outer peripheral side surface of the bottom case 132, thus further improving the waterproof performance of the housing assembly 13.

[0093] Since the expansion of the battery 11 is mainly reflected in the expansion deformation of the large surface of the battery 11, in the present application, the circuit board assembly 12 is arranged on one small surface side of the battery 11, which can reduce the degree of extrusion of the battery 11 on the circuit board assembly 12 during expansion, so as to avoid damaging the circuit board assembly 12. Among them, the circuit board assembly 12 can be fixedly connected to one small surface side of the battery 11, or it can not be fixedly connected to one small surface side of the battery 11, but only be adjacent to and opposite to one small surface side of the battery 11.

[0094] In some alternative embodiments, among the two second side walls 132b of the bottom case 132 opposite to each other in the width direction f2, a first ventilation opening 1324 penetrating in the width direction f2 is provided on one second side wall 132b, and a second ventilation opening 1325 penetrating in the width direction f2 is provided on the other second side wall 132b. Both the first ventilation opening 1324 and the second ventilation opening 1325 are arranged corresponding to the circuit board assembly 12. With such a design, heat convection can be formed by using the first ventilation opening 1324 and the second ventilation opening 1325, so that the gas around the circuit board assembly 12 can flow, thereby taking away the heat of the circuit board assembly 12 to achieve heat dissipation and temperature reduction of the circuit board assembly 12, prevent the circuit from overheating and causing overload and failure, and further contribute to ensuring the normal operation of the circuit board assembly 12 and improving the use safety of the mobile energy storage device 100.

[0095] In the present application, such as Figure 14 and Figure 15As shown, the circuit board assembly 12 may include a protective case 121 and a circuit board 122 disposed within the protection. The circuit board 122 is electrically connected to the battery 11. The circuit board 122 can be a key component for monitoring, controlling, and protecting the battery 11, and it can integrate a Battery Management System (BMS). On the one hand, it can monitor and manage parameters such as the voltage, temperature, charge state, and discharge 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 the working life of the battery 11. On the other hand, based on the fact that the mobile energy storage device in this application is usually a low-voltage design, it can greatly improve the safety factor for operators during production and maintenance and reduce the risk factor of the product. At the same time, based on the voltage conversion function provided by the internal voltage conversion circuit of the battery management system, the low-voltage battery system can output a high voltage adapted to different application scenarios, that is, it can achieve flexible step-up and step-down while reducing the operation difficulty.

[0096] Exemplarily, functional circuits with different functions are provided on the circuit board 122. For example, a bidirectional step-up / step-down circuit, a bidirectional isolation circuit, and an AC-DC conversion circuit (i.e., an 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 in the circuit board 122 according to the application scenario of the mobile energy storage device 100 to meet the application requirements.

[0097] Based on the mobile energy storage device of this application being a low-voltage design, whose voltage value is usually lower than 310V, when the battery 11 of this application discharges, the low-voltage DC output by the battery 11 will first be stepped up to 310V DC through the bidirectional step-up / step-down circuit on the circuit board 122, and then inverted into 220V AC through the AC-DC conversion circuit on the circuit board 122 to meet the charging requirements of the device to be charged, realizing the discharge of the mobile energy storage device 100; while when the battery 11 of this application is charged, the externally input 220V AC is first inverted into 310V DC through the AC-DC conversion circuit on the circuit board 122, and then stepped down to a DC with a voltage value lower than 310V through the bidirectional step-up / step-down circuit on the circuit board 122 to meet the charging requirements of the battery 11, realizing the charging of the battery 11.

[0098] In some optional embodiments, in combination with Figures 14 to 16As shown in the figure, the protective case 121 has a first side surface 121a and a second side surface 121b that are opposite to each other in the width direction f2. The first side surface 121a is provided with a third ventilation opening 1211 that penetrates along the width direction f2, and the second side surface 121b is provided with a fourth ventilation opening 1212 that penetrates along the width direction f2. The third ventilation opening 1211 and the fourth ventilation opening 1212 are connected and communicate with each other. Moreover, the third ventilation opening 1211 and the first ventilation opening 1324 are located on the same side and are connected and communicate with each other. A fan 1213 is installed at the third ventilation opening 1211. The fourth ventilation opening 1212 and the second ventilation opening 1325 are located on the same side and are connected and communicate with each other. Thus, the fan 1213 provided at the third ventilation opening 1211 can form a heat convection through the fourth ventilation opening 1212, the first ventilation opening 1324, and the second ventilation opening 1325, causing the gas around the circuit board 122 to flow, thereby taking away the heat of the circuit board 122, so as to realize the heat dissipation and temperature reduction of the circuit board 122, prevent the circuit from overheating and causing overload and failure, and further help ensure the normal operation of the circuit board assembly 12 and improve the use safety of the mobile energy storage device 100.

[0099] In this application, when starting the fan 1213 to dissipate heat from the circuit board 122, in one exemplary case, the gas outside the bottom case 132 enters the interior of the bottom case 132 from the first ventilation opening 1324 under the action of the fan 1213, and then enters the protective case 121 under the action of the fan 1213 and blows towards the circuit board 122 to take away the heat of the circuit board 122, and then is discharged out of the protective case 121 from the fourth ventilation opening 1212, and finally is discharged out of the bottom case 132 from the second ventilation opening 1325, thereby achieving the effect of dissipating heat from the circuit board 122. In another exemplary case, the gas outside the bottom case 132 enters the interior of the bottom case 132 from the second ventilation opening 1325 under the action of the fan 1213, enters the protective case 121 through the fourth ventilation opening 1212 and flows through the circuit board 122 to take away the heat of the circuit board 122, and then is discharged out of the protective case 121 under the action of the fan 1213, and finally is discharged out of the bottom case 132 from the first ventilation opening 1324, thereby achieving the effect of dissipating heat from the circuit board 122.

[0100] Furthermore, in the width direction f2, the projection of the third ventilation opening 1211 on the bottom case 132 coincides with at least a part of the first ventilation opening 1324, and in the width direction f2, the projection of the fourth ventilation opening 1212 on the bottom case 132 coincides with at least a part of the second ventilation opening 1325. In this way, the flow rate of the gas can be accelerated, which is beneficial to improving the heat dissipation effect of the fan 1213 on the circuit board 122.

[0101] In some alternative embodiments, wind-blocking ribs 1326 are provided on the opposite second sidewalls 132b in the width direction f2 and are located inside the bottom case 132. One wind-blocking rib 1326 and the first vent 1324 are arranged in the length direction f3, and the other wind-blocking rib 1326 and the second vent 1325 are arranged in the length direction f3. Each wind-blocking rib 1326 extends towards the circuit board assembly and / or the battery in the width direction f2 and abuts against the surface of the circuit board assembly 12 and / or the battery 11 facing the second sidewall 132b. Alternatively, each wind-blocking rib 1326 extends towards the circuit board assembly and / or the battery in the width direction f2 and is located between the circuit board assembly 12 (i.e., the protective case 121) and the battery 11. In this way, not only can the wind-blocking ribs 1326 be used to block the hot air flowing through the circuit board 122 from flowing into the battery 11, thereby preventing the battery 11 from operating in a high-temperature environment, ensuring a stable operating state of the battery 11, and improving its operating reliability and stability, but also the wind-blocking ribs 1326 can be used to enhance the structural strength of the bottom case 132.

[0102] An embodiment of the present utility model also discloses an energy storage system, which has the mobile energy storage device described in any of the foregoing embodiments. Specifically, the energy storage system may include an electrical device and the mobile energy storage device described in any of the foregoing embodiments, and the mobile energy storage device can be used to supply power to the electrical device. It can be understood that the 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. For details, reference can be made to the description of the embodiments of the mobile energy storage device, and details will not be repeated here.

[0103] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0104] In addition, the above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the content of this specification should not be construed as a limitation on the present application, and the protection scope of the present application should be subject to the appended claims.

Claims

1. A mobile energy storage device, characterized in that: The mobile energy storage device comprises: Battery; A housing assembly, the housing assembly comprising a bottom housing and a top housing connected to the bottom housing, the battery being disposed in the bottom housing; A first connecting column extending along the height direction of the outer shell assembly is provided inside the top shell, a threaded connecting hole is provided on the surface of the first connecting column facing the bottom shell, a first reinforcing rib is convexly provided on the outer circumferential surface of the first connecting column, and the first reinforcing rib extends along the height direction of the outer shell assembly to be connected with the top shell; A second connecting column extending in the height direction of the outer shell assembly is provided inside the bottom shell, the second connecting column is provided with a connecting through hole, the connecting through hole penetrates the second connecting column and the bottom shell in the height direction of the outer shell assembly, a second reinforcing rib is convexly provided on the outer circumferential surface of the second connecting column, and the second reinforcing rib extends in the height direction of the outer shell assembly to be connected with the bottom shell; and A fastener passes through the connecting through hole along the height direction of the housing component and is connected to the threaded connecting hole.

2. The mobile energy storage device according to claim 1, characterized in that: There are a plurality of the first reinforcing ribs, and the plurality of the first reinforcing ribs are arranged at intervals along the circumference of the first connecting column, and at least one of the first reinforcing ribs is connected to the side wall of the top shell; and / or, There are a plurality of the second reinforcing ribs, and the plurality of the second reinforcing ribs are arranged at intervals along the circumference of the second connecting column, and at least one of the second reinforcing ribs 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 column comprises a first sub-connecting column and a second sub-connecting column, the top shell is a shell structure formed by a plurality of first side walls, two adjacent first side walls are connected at an angle to form a first corner, a first sub-connecting column is provided at each first corner, and at least one first side wall is provided with a second sub-connecting column at a position between two adjacent first sub-connecting columns, the outer peripheral surface of the first sub-connecting column is connected to the first corner through the corresponding first reinforcing rib, or the outer peripheral surface of the first sub-connecting column is connected to both adjacent two first side walls through the corresponding first reinforcing rib, and the outer peripheral surface of the second sub-connecting column is connected to the first side wall through the corresponding first reinforcing rib; The second connecting column includes a third sub-connecting column and a fourth sub-connecting column, the bottom shell is a shell structure formed by a plurality of second side walls, two adjacent second side walls are connected at an angle to form a second corner, each of the second corners is provided with a third sub-connecting column, and at least one second side wall is located between two adjacent third sub-connecting columns and provided with a fourth sub-connecting column, the outer peripheral surface of the third sub-connecting column is connected to the second corner through the corresponding second reinforcing ribs, or the outer peripheral surface of the third sub-connecting column is connected to the two adjacent second side walls through the corresponding second reinforcing ribs, and the outer peripheral surface of the fourth sub-connecting column is connected to the second side wall through the corresponding second reinforcing ribs.

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, and the mobile energy storage device further includes two handles, which are respectively connected to the top shell and are both located outside the top shell, and 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; Wherein, the preset direction is configured as the length direction or the width direction of the housing component.

5. The mobile energy storage device according to claim 4, characterized in that: The mobile energy storage device further includes a circuit board assembly disposed in the bottom shell, and the top surface of the top shell facing away from the bottom shell is provided with two first grooves disposed at intervals, wherein one of the first grooves is located on the first side and penetrates through the side surface of the first side in the preset direction, and the other first groove is located on the second side and penetrates through the side surface of the second side in the preset direction, each of the handles is at least partially accommodated in one of the first grooves, and a holding space for holding the handle is formed between each of the handles and one of the first grooves; An external signal access port is disposed on a groove side wall of one of the first grooves, and the external signal access port is electrically connected to the circuit board assembly.

6. The mobile energy storage device according to claim 1, characterized in that: The battery is a rectangular structure, and has two small face sides extending along the width direction of the housing component, and the two small face sides are arranged opposite to each other. The mobile energy storage device also includes a circuit board component arranged in the bottom shell, and the circuit board component is arranged on one of the small face sides of the battery and is electrically connected to the battery; The bottom shell has two second side walls extending along the length direction of the shell assembly, and the two second side walls are arranged opposite to each other in the width direction of the shell assembly, one of the second side walls is provided with a first vent that passes through the width direction of the shell assembly, and the other second side wall is provided with a second vent that passes through the width direction of the shell assembly, and the first vent and the second vent are both arranged corresponding to the circuit board assembly.

7. The mobile energy storage device according to claim 6, characterized in that: Each of the second side walls is provided with a wind shield rib located in the bottom shell, and the wind shield 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 facing the second side wall, or is located between the circuit board assembly and the battery.

8. The mobile energy storage device according to any one of claims 1 to 7, characterized in that: One end of the top shell close to the bottom shell has a first stop surface abutting against the bottom shell, and one end of the bottom shell close to the top shell has a second stop surface abutting against the first stop surface, and one of the first stop surface and the second stop surface is provided with a positioning groove, and the other of the first stop surface and the second stop surface is provided with a positioning protrusion, and the positioning protrusion is embedded in the positioning groove; and / or, The first connecting column has a first end face facing the bottom shell, the second connecting column has a second end face facing the top shell, one of the first end face of the first connecting column and the second end face of the second connecting column is provided with a limiting groove, and the other of the first connecting column and the second connecting column is embedded in the limiting groove.

9. The mobile energy storage device according to any one of claims 1 to 7, characterized in that: One end of the top shell close to the bottom shell has a first stop surface abutting against the bottom shell, and one end of the bottom shell close to the top shell has a second stop surface abutting against the first stop surface. A second groove is provided on the outer peripheral side of the bottom shell, and the second groove passes through the second stop surface. The mobile energy storage device further comprises an elastic member, and the elastic member is clamped on the groove wall surface of the second groove.

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

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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