Self-unloading structure and electric equipment

Abstract

The utility model discloses a self-unloading structure and electric equipment, the self-unloading structure is used for loading and unloading a battery pack in the electric equipment, the battery pack is provided with a first connecting part, a bearing part of the electric equipment is provided with a second connecting part, the first connecting part and the second connecting part are overlapped, and the self-unloading structure is provided with a driving part and a connecting rod; the driving part is arranged on the side, away from the first connecting part, of the second connecting part, the first connecting end of the connecting rod is connected with the driving part, the driving part can drive the connecting rod to stretch out or retract, and the second connecting end of the connecting rod penetrates through the second connecting part and is connected with the first connecting part so that the battery pack can be fixedly installed on the bearing part. When the battery pack is in thermal runaway, the connecting rod contracts to the second connecting end to release the connection with the first connecting part, the first connecting part is separated from the second connecting part, and the battery pack is separated from the bearing part and falls off, so that the battery pack can be separated from the bearing part and falls off in time when thermal runaway occurs, and the use safety and the service life of the electric equipment are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a self-unloading structure and electrical equipment. Background Art

[0002] Battery packs are usually fixedly installed in electrical equipment. When the battery cells inside the battery pack are damaged due to scratches, overcharging or over-discharging of the battery pack, or impact on the electrical equipment, which causes thermal runaway of the battery cells, the battery pack cannot be removed from the electrical equipment in a short period of time, resulting in continuous eruption of high-temperature and high-pressure thermal runaway gases generated by the thermal runaway, ultimately causing damage to the electrical equipment. Utility Model Content

[0003] The utility model aims to provide a self-unloading structure and an electric device, so as to solve the problem that the battery pack cannot be unloaded from the electric device in time when thermal runaway occurs, resulting in damage to the electric device.

[0004] A first aspect of an embodiment of the present application provides a self-unloading structure, the self-unloading structure is used for loading and unloading a battery pack in an electrical device; the electrical device includes a battery pack and a carrier; a first accommodating cavity is provided inside the carrier, and the carrier includes a second connecting portion arranged in the first accommodating cavity; the battery pack is arranged in the first accommodating cavity, the battery pack includes a box body, a first connecting portion is protruding from the box body, the first connecting portion has a thickness direction, and the second connecting portion is overlapped with the first connecting portion along the thickness direction; the self-unloading structure is arranged in the first accommodating cavity, and includes: a driving member, which is arranged at the second connecting portion at the position where the second connecting portion is located; The connecting rod is a side away from the first connecting part in the thickness direction; the connecting rod comprises a first connecting end and a second connecting end arranged opposite to each other in the thickness direction, the first connecting end is connected to the driving member, and the driving member can drive the connecting rod to extend or retract along the thickness direction; along the thickness direction, the connecting rod extends to the second connecting end, passes through the second connecting part and is connected to the first connecting part, so as to fix the battery pack in the first accommodating cavity; the connecting rod is retracted until the connecting rod is disconnected from the first connecting part, the first connecting part is separated from the second connecting part, and the battery pack is separated from the carrier and falls off.

[0005] Optionally, a first accommodating cavity is provided inside the first connecting part, and the first connecting part includes a first wall, which faces the second connecting part in the thickness direction; the self-unloading structure also includes a sliding member, and the sliding member is arranged in the first accommodating cavity; along the thickness direction, the connecting rod is extended, and the second connecting end pushes the sliding member until the sliding member abuts against the first wall, and the connecting rod is connected to the first connecting part through the sliding member; the connecting rod contracts until the sliding member is separated from the first wall, thereby releasing the connection between the connecting rod and the first connecting part.

[0006] Optionally, the self-unloading structure also includes a accommodating member; a second accommodating cavity is provided inside the accommodating member, the accommodating member passes through the second connecting part along the thickness direction and is inserted into the first accommodating cavity, and a second through hole is opened on the accommodating member located in the first accommodating cavity to connect the first accommodating cavity with the second accommodating cavity; the sliding member is arranged in the second accommodating cavity; the connecting rod is inserted in the second accommodating cavity, the connecting rod is extended, and the second connecting end pushes the sliding member, and part of the sliding member can extend from the second through hole and abut against the first wall; the connecting rod is retracted to the second connecting end and separated from the sliding member, and the sliding member can be retracted from the second through hole into the second accommodating cavity and separated from the first wall.

[0007] Optionally, a first through hole connected to the first accommodating cavity is opened on the first wall, and the first wall has an inner circumferential wall surrounding the first through hole along the circumference of the first through hole; the second connecting end pushes the sliding member, and the sliding member moves to abut against the inner circumferential wall; the second connecting end is separated from the sliding member, and the sliding member moves to separate from the inner circumferential wall; wherein the surface of the sliding member in contact with the inner circumferential wall is an arc surface.

[0008] Optionally, the surface of the sliding member in contact with the second connecting end is a curved surface, and / or the surface of the second connecting end in contact with the sliding member is a curved surface.

[0009] Optionally, along the thickness direction, a stopper is protruding from the surface of the sliding member facing the first wall; when the sliding member moves to abut against the inner peripheral wall, the stopper abuts against the accommodating member.

[0010] Optionally, the number of the sliding members is at least two, and at least two of the sliding members are arranged at intervals along the circumferential direction of the connecting rod.

[0011] Optionally, the driving member can drive the connecting rod to rotate and extend or retract along the thickness direction; and among the first connecting part and the second connecting part, at least the first connecting part is threadedly connected to the connecting rod.

[0012] Optionally, the driving member is arranged on the supporting member, or the driving member is arranged on the box body.

[0013] The second aspect of the embodiments of the present application provides an electrical device, including: a battery pack, the battery pack including a case and a battery management assembly, the case having a first connecting portion protruding therefrom, the first connecting portion having a thickness direction, and the battery management assembly being arranged inside the case; a supporting member, the supporting member having a second connecting portion, the second connecting portion and the first connecting portion being overlapped along the thickness direction; a controller, the battery management assembly being communicatively connected to the controller; and, as the aforementioned self-unloading structure, a driving member in the self-unloading structure being communicatively connected to the controller, the controller driving a connecting rod to extend or retract along the thickness direction by controlling the driving member.

[0014] In summary, the embodiments of the present application provide a self-unloading structure and an electrical device having the self-unloading structure, wherein the self-unloading structure is used for loading and unloading a battery pack in the electrical device, a first connecting portion is protrudingly provided on the box body of the battery pack, a first accommodating cavity is provided inside the carrier of the electrical device and includes a second connecting portion provided inside the first accommodating cavity, the first connecting portion and the second connecting portion are overlapped along the thickness direction, and the self-unloading structure is provided with a driving member and a connecting rod, the driving member is provided on a side of the second connecting portion away from the first connecting portion, the first connecting end of the connecting rod is connected to the driving member, the driving member can drive the connecting rod to extend or retract along the thickness direction, the driving member drives the connecting rod to extend, and the second connecting end of the connecting rod passes through the second connecting portion along the thickness direction and The battery pack is connected to the first connection part to fix the battery pack on the carrier, and the connecting rod is retracted to the second connection end to release the connection with the first connection part. The first connection part is separated from the second connection part, so that the battery pack is separated from the carrier, and the battery pack automatically falls down due to its own weight. Therefore, when thermal runaway occurs, the battery pack can be separated and dropped from the carrier in time through the control of the driving part, so as to avoid the gas and flame generated by thermal runaway continuously damaging the electrical equipment and causing damage to the electrical equipment, thereby ensuring the safety and service life of the electrical equipment. The abnormality of the battery pack will not affect the electrical equipment as a whole, the safety of users is improved, the probability of overall damage to the electrical equipment is reduced, and economic losses are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1This is a schematic diagram of the first structure of the self-unloading structure, battery pack and bearing assembly provided in the embodiment of the present application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at point A;

[0018] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at B;

[0019] Figure 4 yes Figure 1 A schematic diagram of the structure of the connection between the connecting rod contact and the first connecting part in the self-unloading structure shown;

[0020] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at C;

[0021] Figure 6 This is a second structural schematic diagram of the self-unloading structure, battery pack and bearing assembly provided in the embodiment of the present application;

[0022] Figure 7 yes Figure 6 A schematic diagram of the structure at D of FIG.

[0023] Figure 8 It is a third structural schematic diagram of the self-unloading structure, battery pack and bearing assembly provided in the embodiment of the present application;

[0024] Fig. 9 yes Figure 8 A schematic diagram of the structure at E of FIG.

[0025] Fig.10 yes Figure 8 The structural schematic diagram of the connecting rod in the self-unloading structure shown;

[0026] Fig.11 yes Fig.10 A schematic structural diagram of the connecting rod and the first connecting part in a state of being separated;

[0027] Fig.12 yes Fig.10 A schematic structural diagram of the connecting rod and the first connecting part in a connected state;

[0028] Fig.13 It is a schematic diagram of the structure of the electrical equipment provided in the embodiment of the present application;

[0029] Fig.14 yes Fig.13 Exploded diagram of

[0030] Fig.15 It is a schematic diagram of the structure of a battery pack in an electric device provided in an embodiment of the present application;

[0031] Fig.16 yes Fig.15 Exploded diagram of

[0032] Fig.17 It is a schematic diagram of the combined structure of the self-unloading structure provided in the embodiment of the present application and the controller, battery pack and bearing member in the electrical equipment.

[0033] Description of main reference numerals:

[0034] 100. Self-unloading structure;

[0035] 10. driving member, 20. connecting rod, 21. first connecting end, 22. second connecting end, 23. protruding portion, 30. sliding member, 31. stopper, 40. accommodating member, 401. second accommodating chamber, 41. end wall, 42. side wall, 43. second through hole, 50. buffer member;

[0036] 200, electrical equipment, 201, subject;

[0037] 210, battery pack, 211, box body, 2110, second accommodating cavity, 2111, side surface, 2112, top surface, 2113, bottom surface, 212, first connecting portion, 2120, first accommodating cavity, 2121, first wall, 2122, second wall, 2123, first through hole, 2124, inner peripheral wall, 2125, third through hole, 2126, accommodating groove, 2127, jack, 213, battery management assembly, 214, battery cell, 215, collection harness;

[0038] 220, bearing member, 2201, first accommodating cavity, 221, second connecting portion;

[0039] 230, controller, 231, communication harness, 232, control harness;

[0040] X, thickness direction. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and beneficial effects of this application more clear, the following further describes this application in detail in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining this application, not for limiting this application.

[0042] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the application examples, "parallel" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. In addition, "perpendicular" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles refer to a state where the tolerance range is -1% to 1%.

[0046] In some embodiments of the present application, a self-unloading structure 100 is provided, and the self-unloading structure 100 is used for loading and unloading a battery pack 210 in an electric device 200, referring to Figure 1 , Figure 6 , Figure 8 as well as Figure 14 to Figure 16 , the electric device 200 includes a battery pack 210 and a carrier 220. Figure 1-2 , Figure 4 , Figure 6 to Figure 9 as well as Fig.14 and Fig.17 The carrier 220 has a first accommodating cavity 2201 therein. Figures 1 to 9 , a second connecting portion 221 is disposed on the carrier 220. Figure 1-2 , Figure 4 as well as Figure 6 to Figure 8 The battery pack 210 is disposed in the first accommodation cavity 2201 of the carrier 220, referring to Figure 1-2 , Figure 4 , Figure 6 to Figure 8 as well as Figure 14 to Figure 16 The battery pack 210 includes a box body 211 , a first connection portion 212 is protruded from the box body 211 , the first connection portion 212 has a thickness direction X, and the second connection portion 221 overlaps the first connection portion 212 along the thickness direction X.

[0047] Reference Figures 1 to 12 The self-unloading structure 100 includes: a driving member 10 and a connecting rod 20.

[0048] Reference Figures 1 to 9 The driving member 10 is disposed on a side of the second connecting portion 221 away from the first connecting portion 212 in the thickness direction X, referring to Figure 2 to Figure 4 , Figure 7 as well as Figure 9-10 The connecting rod 20 includes a first connecting end 21 and a second connecting end 22 that are arranged opposite to each other along the thickness direction X. The first connecting end 21 is connected to the driving member 10, and the driving member 10 can drive the connecting rod 20 to extend or retract along the thickness direction X. The connecting rod 20 extends along the thickness direction X to the second connecting end 22, passes through the second connecting portion 221, and is connected to the first connecting portion 212, so as to fix the battery pack 210 on the carrier 220. The connecting rod 20 retracts along the thickness direction X to the second connecting end 22 to release the connection with the first connecting portion 212, and the first connecting portion 212 is separated from the second connecting portion 221. The battery pack 210 is separated from the carrier 220 and falls off. Specifically, the battery pack 210 falls off and falls out of the first accommodating cavity 2201 by the weight of the battery pack 210 itself to separate from the carrier 220.

[0049] As a component that provides electrical energy to electrical equipment, the battery pack is usually fixedly installed in the electrical equipment, and in order to facilitate the maintenance of the battery pack, the bottom of the battery pack case is usually exposed. When the exposed bottom is scratched, the battery pack is overcharged or over-discharged, or the electrical equipment is hit, the battery cells inside the battery pack are damaged, and thermal runaway of the battery cells occurs, the fixedly installed battery pack cannot be removed from the electrical equipment in a short period of time, resulting in continuous eruption of high-temperature and high-pressure thermal runaway gases generated by the battery cells in thermal runaway, which in turn causes the battery pack to catch fire, and ultimately leads to damage to the electrical equipment.

[0050] The self-unloading structure 100 for loading and unloading a battery pack 210 in an electric device 200 provided in the embodiment of the present application has a second connecting portion 221 disposed in a first accommodating cavity 2201 of a carrier 220 of the electric device 200, the battery pack 210 is disposed in the first accommodating cavity 2201, a first connecting portion 212 is protruded from a box body 211 of the battery pack 210, and the first connecting portion 212 and the second connecting portion 221 are overlapped along a thickness direction X of the first connecting portion 212. The self-unloading structure 100 is arranged in the first accommodating cavity 2201. The self-unloading structure 100 is provided with a driving member 10 and a connecting rod 20. The driving member 10 is arranged on the side of the second connecting portion 221 away from the first connecting portion 212 in the thickness direction X. The first connecting end 21 of the connecting rod 20 is connected to the driving member 10. The driving member 10 can drive the connecting rod 20 to extend or retract along the thickness direction X. The driving member 10 drives the connecting rod 20 to extend, and the second connecting end 22 of the connecting rod 20 is extended along the thickness direction X. The second connection part 221 on the carrier 220 is passed through in the X direction and connected to the first connection part 212 on the box body 211, so as to fix the battery pack 210 in the first accommodating cavity 2201 of the carrier 220. The driving member 10 drives the connecting rod 20 to contract. The connecting rod 20 contracts to the second connection end 22 to release the connection with the first connection part 212. The first connection part 212 is separated from the second connection part 221. The battery pack 210 is separated from the carrier 220 and falls from the first accommodating cavity 2201 by its own weight. Therefore, when the battery cell 214 in the battery pack 210 has thermal runaway, the driving member 10 controls the connecting rod 20, so that the battery pack 210 is separated from the carrier 220 in time and falls automatically by its own weight, thereby avoiding the thermal runaway gas generated by the thermal runaway of the battery cell 214 and the flame caused by the injection of the thermal runaway gas to continuously damage the electrical equipment 200, thereby ensuring the safety and service life of the electrical equipment 200. Moreover, the driving member 10 drives the connecting rod 20 to retract and contract to achieve a fixed or separated setting between the battery pack 210 and the carrier 220. The contraction action can make the connecting rod 20 be withdrawn promptly and quickly, ensuring that the battery pack 210 and the carrier 220 are separated promptly and quickly, avoiding jamming during the removal of the battery pack 210. The abnormality of the battery pack 210 will not affect the entire electrical equipment 200, the safety of users is improved, the probability of overall damage to the electrical equipment 200 is reduced, and economic losses are reduced.

[0051] The electrical equipment 200 may be, but is not limited to, mobile devices (such as mobile phones, laptop computers, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc. The driving member 10 may be a device such as a telescopic motor, a hydraulic telescopic machine, a cylinder telescopic machine, etc., which can drive the connecting rod 20 to extend and retract.

[0052] In some embodiments, reference Figure 1 , Figure 6 , Figure 8 as well as Figure 13 to Figure 17 The electric device 200 is an electric vehicle, and the electric device 200 includes a main body 201 , a battery pack 210 and a carrier 220 .

[0053] The main body 201 is the main structure of the electric vehicle, which is equivalent to the body of the electric vehicle, and the bearing member 220 is equivalent to the frame of the electric vehicle. Figure 1 , Figure 6 , Figure 8 as well as Fig.14 and Fig.17 The supporting member 220 is a hexahedral structure, and a first accommodating cavity 2201 is provided inside the supporting member 220. Along the height direction of the electric vehicle, openings communicating with the first accommodating cavity 2201 are separately provided on the opposite end surfaces of the supporting member 220, so that the supporting member 220 forms a hexahedral structure with open ends.

[0054] Reference Figure 1 , Figure 6 , Figure 8 as well as Fig.17 The battery pack 210 is disposed in the first accommodation cavity 2201 of the carrier 220, referring to Figure 1 , Figure 6 , Figure 8 as well as Figure 14 to Figure 16 The box body 211 of the battery pack 210 includes a side surface 2111, a top surface 2112 and a bottom surface 2113. The side surface 2111 is a tetrahedron structure with two open ends. The top surface 2112 and the bottom surface 2113 cover the two open ends respectively, so that the box body 211 forms a closed hexahedron structure. Figure 1 , Figure 6 , Figure 8 as well as Fig.16 A second accommodating chamber 2110 is defined inside the box body 211 , and the battery cell 214 is disposed in the second accommodating chamber 2110 .

[0055] In some embodiments, reference Figure 1-2 , Figure 4 , Figure 6 to Figure 9 as well as Figure 14 to Figure 16 The first connection portion 212 is protrudingly disposed on the side surface 2111 of the box body 211, and the thickness direction X of the first connection portion 212 is parallel to the height direction of the box body 211. Figure 14 to Figure 16 In the embodiment shown, the number of the first connection parts 212 is multiple, and they are arranged at intervals on the side surface 2111 along the length direction of the box body 211. Specifically, multiple first connection parts 212 are respectively arranged on two side surfaces 2111 arranged opposite to each other along the width direction of the box body 211. Fig.17, the self-unloading structure 100 corresponds to the first connecting portion 212 in number.

[0056] Reference Figure 1 , Figure 6 and Figure 8 The bottom surface 2113 of the box body 211 is located on the outside of the end of the support member 220 away from the top surface 2112, that is, the bottom surface 2113 of the box body 211 is exposed on the outside of the support member 220, resulting in that during the driving of the electric vehicle, the exposed bottom surface 2113 is easily scratched against obstacles on the road (such as road bumps, stones, etc.), causing damage to the box body 211, and further increasing the probability of thermal runaway of the internal battery cells 214.

[0057] Reference Figures 1 to 9 Along the thickness direction X, the first connection part 212 is arranged on the side of the second connection part 221 away from the top surface 2112, so that the second connection part 221 will not form a support for the first connection part 212, and then when the connecting rod 20 contracts to release the connection between the second connection end 22 and the first connection part 212, the first connection part 212 can be separated from the second connection part 221 by the weight of the battery pack 210 itself, and the battery pack 210 can fall directly from the first accommodating cavity 2201, so that the battery pack 210 is separated from the electrical equipment 200 (i.e., the electric vehicle), thereby ensuring the safe use of the electrical equipment 200.

[0058] In some embodiments, the first connection portion 212 is protrudingly disposed on the top surface 2112 of the box body 211, and the thickness direction X of the first connection portion 212 is parallel to the length direction of the box body 211. Along the height direction of the box body 211, the end surface of the support member 220 facing the top surface 2112 is closed, and the end surface of the support member 220 facing the bottom surface 2113 is opened, so that the support member 220 forms a hexahedral structure with one side open, and the bottom surface 2113 of the box body 211 is exposed at the opening, and the second connection portion 221 is protrudingly disposed on the support member 220 faces the inner surface of one end face of the top surface 2112, the second connection part 221 is overlapped with the first connection part 212 along the thickness direction X, the connecting rod 20 passes through the second connection part 221 along the thickness direction X and is connected to the first connection part 212, so that the battery pack 210 is suspended on the second connection end 22 of the connecting rod 20 through the first connection part 212, the driving member 10 drives the connecting rod 20 to shrink to the second connection end 22 to release the connection with the first connection part 212, and the battery pack 210 automatically falls due to its own weight to be separated from the supporting member 220.

[0059] In some embodiments, reference Figure 2 to Figure 5 The first connection portion 212 has a first accommodating cavity 2120 disposed therein. Figure 2-3 as well as Figure 5The first connection portion 212 includes a first wall 2121 and a second wall 2122 that are arranged opposite to each other along the thickness direction X. The first wall 2121 faces the second connection portion 221 in the thickness direction X. Figure 2 to Figure 5 The self-unloading structure 100 also includes a sliding member 30, which is arranged in the first accommodating cavity 2120. The driving member 10 drives the connecting rod 20 to extend along the thickness direction X, and the second connecting end 22 pushes the sliding member 30 until the sliding member 30 abuts against the first wall 2121, so that the connecting rod 20 is connected to the first connecting portion 212 through the sliding member 30. In other words, the second connecting end 22 of the connecting rod 20 cooperates with the first wall 2121 of the first connecting portion 212 to clamp the sliding member 30, and the pushing force of the second connecting end 22 on the sliding member 30 and the reaction force generated by the pushing force of the first wall 2121 on the sliding member 30 are balanced, so that the first connecting portion 212 is fixedly connected to the second connecting portion 221 through the sliding member 30, the connecting rod 20, and the battery pack 210 is fixedly installed in the first accommodating cavity 2201 of the carrier 220. The driving member 10 drives the connecting rod 20 to shrink along the thickness direction X until the sliding member 30 is separated from the first wall 2121, thereby releasing the connection between the connecting rod 20 and the first connecting portion 212. Specifically, the connecting rod 20 shrinks along the thickness direction X until the second connecting end 22 is separated from the sliding member 30, and the sliding member 30 loses the pushing force of the second connecting end 22. The sliding member 30 slides in a direction away from the first wall 2121 under the action of the reaction force of the first wall 2121 until the sliding member 30 is separated from the first wall 2121, thereby releasing the connection between the connecting rod 20 and the first connecting portion 212, and releasing the connection between the first connecting portion 212 and the second connecting portion 221. The battery pack 210 falls from the first accommodating cavity 2201 under the action of its own weight, so that the battery pack 210 is separated from the carrier 220, and the battery pack 210 is separated from the electrical equipment 200. The matching design of the sliding member 30 and the connecting rod 20 can ensure a stable connection between the connecting rod 20 and the first connecting portion 212 through the thrust and reaction force applied to the sliding member 30 by the second connecting end 22 and the first wall 2121, thereby ensuring the assembly stability between the battery pack 210 and the supporting member 220. When the connecting rod 20 shrinks and is withdrawn, the sliding member 30 that loses the thrust can be smoothly separated from the first wall 2121 under the action of the reaction force of the first wall 2121, thereby ensuring timely and smooth separation between the first connecting portion 212 and the second connecting portion 221, ensuring that the battery pack 210 falls off from the supporting member 220 in time, and ensuring the safety of use and service life of the electrical equipment 200.

[0060] In some embodiments, reference Figure 2 to Figure 5The self-unloading structure 100 further includes a container 40, wherein a second accommodating cavity 401 is provided inside the container 40, and the container 40 penetrates the second connecting portion 221 along the thickness direction X and is inserted into the first accommodating cavity 2120, and a second through hole 43 is provided on the container 40 located inside the first accommodating cavity 2120 to connect the second accommodating cavity 401 with the first accommodating cavity 2120, and the sliding member 30 is disposed in the second accommodating cavity 401, as shown in FIG. Figure 2-3 as well as Figure 5 In the illustrated embodiment, the accommodating member 40 includes an end wall 41 and a side wall 42. The side wall 42 surrounds the end wall 41 along the circumferential direction of the end wall 41 and defines a second accommodating cavity 401. Along the thickness direction X, one end of the side wall 42 away from the end wall 41 is connected to the driving member 10. The side wall 42 passes through the second connecting portion 221 along the thickness direction X and extends into the first accommodating cavity 2120 of the first connecting portion 212. The end wall 41 is located in the first accommodating cavity 2120. A second through hole 43 is opened on the side wall 42 located in the first accommodating cavity 2120 to connect the first accommodating cavity 2120 with the second accommodating cavity 401. The sliding member 30 is arranged on the end wall 41.

[0061] Reference Figure 2 to Figure 5 , the connecting rod 20 is inserted into the second accommodating cavity 401, referring to Figure 2-3 The connecting rod 20 extends along the thickness direction X, and the second connecting end 22 of the connecting rod 20 pushes the sliding member 30. Part of the sliding member 30 can extend from the second through hole 43 and abut against the first wall 2121 of the first connecting portion 212, so that the connecting rod 20 is connected to the first connecting portion 212 through the sliding member 30. Figure 4-5, the connecting rod 20 shrinks along the thickness direction X until the second connecting end 22 is separated from the sliding member 30, and the sliding member 30 can have the second through hole 43 retracted into the second accommodating cavity 401 and separated from the first wall 2121, thereby releasing the connection between the connecting rod 20 and the first connecting portion 212. Specifically, the second connecting end 22 is separated from the sliding member 30, and the sliding member 30 loses the pushing force applied by the second connecting end 22 to the sliding member 30, so that the sliding member 30 is retracted from the second through hole 43 to the second accommodating cavity 401 and separated from the first wall 2121 under the action of the reaction force of the first wall 2121, thereby releasing the connection between the first connecting portion 212 and the second connecting portion 221, and the battery pack 210 falls from the first accommodating cavity 2201 under the action of its own weight, so that the battery pack 210 is separated from the carrier 220, and the battery pack 210 is separated from the electrical equipment 200. The setting of the accommodating member 40 can restrict and accommodate the sliding member 30, so that the sliding member 30 can extend or retract into the second accommodating chamber 401 through the second through hole 43 as the connecting rod 20 extends or contracts, thereby preventing the electrical equipment 200 from shaking or being hit, thereby ensuring the stability of the abutment between the sliding member 30 and the second connecting end 22 and the first wall 2121, and further ensuring the assembly stability of the battery pack 210 in the carrier 220, and preventing the battery pack 210 from falling from the electrical equipment 200 under normal conditions.

[0062] In some embodiments, reference Figure 3 and Figure 5 A first through hole 2123 communicating with the first accommodating cavity 2120 is formed on the first wall 2121 of the first connecting portion 212. The first wall 2121 has an inner peripheral wall 2124 surrounding the first through hole 2123 along the circumferential direction of the first through hole 2123. Figure 3 The connecting rod 20 extends in the thickness direction X, and the second connecting end 22 of the connecting rod 20 pushes the sliding member 30. The sliding member 30 extends from the second through hole 43 and abuts against the inner peripheral wall 2124. Specifically, the sliding member 30 abuts against one end of the inner peripheral wall 2124 away from the second connecting portion 221 in the thickness direction X. The second connecting end 22 of the connecting rod 20 cooperates with the inner peripheral wall 2124 to clamp the sliding member 30. The pushing force of the second connecting end 22 on the sliding member 30 and the reaction force of the inner peripheral wall 2124 on the sliding member 30 due to the pushing force are balanced, so that the first connecting portion 212 is fixedly connected to the second connecting portion 221 through the sliding member 30 and the connecting rod 20, so that the battery pack 210 is stably installed in the first accommodating cavity 2201 of the carrier 220. Referring to 4 and Figure 5The connecting rod 20 shrinks along the thickness direction X to the second connecting end 22 and separates from the sliding member 30. The sliding member 30 loses the pushing force applied by the second connecting end 22 to the sliding member 30, so that the sliding member 30 is retracted from the second through hole 43 to the second accommodating cavity 401 and separated from the inner circumferential wall 2124 under the action of the reaction force of the inner circumferential wall 2124, and the connection between the first connecting portion 212 and the second connecting portion 221 is released. The battery pack 210 falls from the first accommodating cavity 2201 under the action of its own weight, so that the battery pack 210 is separated from the carrier 220, and the battery pack 210 is separated from the electrical equipment 200. The sliding member 30 abuts against the inner circumferential wall 2124 surrounding the first through hole 2123, which can ensure that the reaction force exerted by the inner circumferential wall 2124 on the sliding member 30 prevents the sliding member 30 from sliding relative to the inner circumferential wall 2124, thereby ensuring the connection stability between the second connecting part 221 and the first connecting part 212, and ensuring the assembly stability between the battery pack 210 and the carrier 220. Moreover, when the connecting rod 20 contracts, the reaction force of the inner circumferential wall 2124 on the sliding member 30 can make the sliding member 30 smoothly retract into the second accommodating cavity 401, so that the battery pack 210 can be separated and dropped from the electrical equipment 200 in a timely and smooth manner.

[0063] In some embodiments, reference Figure 2 to Figure 5 The surface where the sliding member 30 contacts the inner peripheral wall 2124 is an arc surface. The arc surface design enables the sliding member 30 to be retracted into the second accommodating cavity 401 in a timely and smooth manner when separated from the inner peripheral wall 2124, thereby ensuring that the battery pack 210 can be separated and dropped from the electric device 200 in a timely and smooth manner.

[0064] In some embodiments, reference Figure 2 to Figure 5 The surface where the sliding member 30 contacts the second connecting end 22 is an arc surface. Therefore, when the connecting rod 20 extends and the second connecting end 22 pushes the sliding member 30, the sliding member 30 can extend from the second through hole 43 to the second accommodating cavity 401 in a direction orthogonal to the thickness direction X, so that the sliding member 30 smoothly extends from the second accommodating cavity 401, ensuring the connection stability between the first connecting portion 212 and the second connecting portion 221.

[0065] In some embodiments, reference Figure 2 to Figure 5 The surface where the second connecting end 22 contacts the sliding member 30 is an arc surface. Therefore, when the connecting rod 20 extends and the second connecting end 22 pushes the sliding member 30, the sliding member 30 can extend from the second through hole 43 to the second accommodating cavity 401 in a direction orthogonal to the thickness direction X, so that the sliding member 30 smoothly extends from the second accommodating cavity 401, thereby ensuring the connection stability between the first connecting portion 212 and the second connecting portion 221.

[0066] In some embodiments, reference Figure 3 and Figure 5The sliding member 30 is provided with a stopper 31 protruding from the surface facing the first wall 2121 in the thickness direction X. Specifically, the stopper 31 is provided protruding from the surface of the sliding member 30 facing the first wall 2121 in the thickness direction X. The connecting rod 20 extends in the thickness direction X, and the second connecting end 22 pushes the sliding member 30. The sliding member 30 extends from the second through hole 43 in a direction perpendicular to the thickness direction X and moves to abut against the inner peripheral wall 2124. The stopper 31 abuts against the accommodating member 40. Specifically, the stopper 31 abuts against the side wall 42 of the accommodating member 40. The provision of the stopper 31 can limit the movement of the sliding member 30 in the direction perpendicular to the thickness direction X, so as to prevent the sliding member 30 from only partially extending from the second through hole 43 to the second accommodating cavity 401 under the action of the second connecting end 22 pushing. When the connecting rod 20 contracts, the sliding member 30 can be smoothly retracted into the second accommodating cavity 401.

[0067] In some embodiments, reference Figure 2 to Figure 5 The number of the sliding members 30 is at least two, and at least two sliding members 30 are arranged at intervals along the circumferential direction of the connecting rod 20. The arrangement of the plurality of sliding members 30 enables the second connecting end 22 to simultaneously push the plurality of sliding members 30 until the sliding members 30 abut against the first wall 2121 when the connecting rod 20 is extended, thereby ensuring the connection stability between the connecting rod 20 and the first connecting portion 212 through the sliding member 30, and further ensuring the connection stability between the first connecting portion 212 and the second connecting portion 221.

[0068] In some embodiments, reference Figure 6-7 The driving member 10 can drive the connecting rod 20 to rotate and extend or retract along the thickness direction X. Among the first connecting portion 212 and the second connecting portion 221, at least the first connecting portion 212 is threadedly connected to the connecting rod 20. Figure 6 and Figure 7 In the embodiment shown, the connecting rod 20 rotates and extends along the thickness direction X, and the connecting rod 20 sequentially passes through the second connecting portion 221 and the first connecting portion 212, and the connecting rod 20 is threadedly connected to the first connecting portion 212, thereby realizing a fixed connection between the connecting rod 20 and the first connecting portion 212, and the first connecting portion 212 is connected to the second connecting portion 221 through the connecting rod 20, so that the battery pack 210 is fixedly installed in the first accommodating cavity 2201 of the carrier 220; the connecting rod 20 rotates and contracts along the thickness direction X until the connecting rod 20 is disconnected from the first connecting portion 212, the first connecting portion 212 is separated from the second connecting portion 221, and the battery pack 210 falls from the first accommodating cavity 2201 by its own weight. Figure 2 to Figure 5 Compared with the structure in which the first receiving cavity 2120 is provided in the first connecting portion 212 of the embodiment shown in the figure, Figure 6-7In the illustrated embodiment, the first accommodating cavity 2120 is not provided in the first connecting portion 212. Instead, a socket 2127 penetrating the first connecting portion 212 along the thickness direction X is opened on the first connecting portion 212. The connecting rod 20 is threadedly connected to the first connecting portion 212 via the socket 2127 to achieve a fixed connection between the connecting rod 20 and the first connecting portion 212, thereby simplifying the processing and manufacturing process and reducing production costs.

[0069] In some embodiments, reference Figure 1-2 , Figure 4 as well as Figure 6 to Figure 9 The driving member 10 is disposed on the carrier 220 , specifically, the driving member 10 is disposed on the inner wall of the carrier 220 , so that the self-unloading structure 100 will not affect the falling of the battery pack 210 , thereby ensuring the smoothness of the falling of the battery pack 210 .

[0070] In some embodiments, the driving member 10 is disposed on the box body 211 of the battery pack 210. Specifically, the first connecting portion 212 is disposed on the side surface 2111 of the box body 211, the driving member 10 is disposed on the side surface 2111, and the self-unloading structure 100 falls from the first accommodating cavity 2201 following the battery pack 210; the first connecting portion 212 is disposed on the top surface 2112 of the box body 211, and the driving member 10 is also disposed on the top surface 2112.

[0071] In some embodiments, reference Figure 8 to Figure 12 The driving member 10 drives the connecting rod 20 to rotate to realize the connection and separation between the first connecting portion 212 and the second connecting portion 221. Specifically, refer to Fig. 9 and Fig.11 The first connecting portion 212 is provided with a third through hole 2125 penetrating the first connecting portion 212 along the thickness direction X. Fig.11 and Fig.12 The inner side wall of the connecting portion 212 is provided with a receiving groove 2126, and the receiving groove 2126 penetrates the first connecting portion 212 at opposite ends along the thickness direction X to form a through groove structure, referring to Fig. 9 and Fig.10 The second connecting end 22 of the connecting rod 20 is provided with a protrusion 23, and the protrusion 23 is protruded on the side wall of the connecting rod 20 along a direction orthogonal to the thickness direction X. The protrusions 23 correspond to the accommodating grooves 2126 in number.

[0072] During assembly, the first connecting end 21 of the connecting rod 20 can be inserted into the third through hole 2125 from the side of the first connecting portion 212 away from the second connecting portion 221 and penetrate the second connecting portion 221 , and then the first connecting end 21 is connected to the driving end of the driving member 10 . The driving member 10 drives the connecting rod 20 to rotate until the protrusion 23 abuts against a side of the first connecting portion 212 facing away from the second connecting portion 221 in the thickness direction X, so that the first connecting portion 212 is connected to the second connecting portion 221 through the connecting rod 20, thereby realizing the assembly of the battery pack 210 in the first accommodating cavity 2201 of the carrier 220; the driving member 10 drives the connecting rod 20 to rotate until the protrusion 23 and the accommodating groove 2126 in the first connecting portion 212 are arranged relative to each other along the thickness direction X, the first connecting portion 212 loses the support of the protrusion 23, and the battery pack 210 falls due to its own weight. During the falling process, the protrusion 23 slides out of the accommodating groove 2126 along the thickness direction X, so that the first connecting portion 212 is separated from the second connecting portion 221.

[0073] Specific as Fig.10 In the embodiment shown, the number of the protrusions 23 is four, surrounding the connecting rod 20 along the circumferential direction of the connecting rod 20, as shown in FIG. Fig.11 and Fig.12 In the embodiment shown, the number of the receiving grooves 2126 is four, which are arranged at intervals along the circumferential direction of the third through hole 2125 to form a four-leaf clover cross-section structure. Fig. 9 and Fig.12 The driving member 10 drives the connecting rod 20 to rotate, and the connecting rod 20 drives the protruding portion 23 to rotate until the protruding portion 23 abuts against a side of the first connecting portion 212 that is away from the second connecting portion 221 in the thickness direction X. The protruding portion 23 forms a support for the first connecting portion 212 in the thickness direction X, so that the first connecting portion 212 and the second connecting portion 221 are overlapped along the thickness direction X, so that the battery pack 210 is installed in the first accommodating cavity 2201 of the carrier 220; refer to Fig.11 The driving member 10 drives the connecting rod 20 to rotate, and the connecting rod 20 drives the protrusion 23 to rotate until the protrusion 23 is embedded in the accommodating groove 2126. The through-groove structure of the accommodating groove 2126 causes the first connecting portion 212 to lose the support of the protrusion 23, and the battery pack 210 falls by its own weight. During the falling process, the protrusion 23 slides in the accommodating groove 2126 along the thickness direction X until the first connecting portion 212 is separated from the protrusion 23 and the second connecting portion 221, so that the battery pack 210 falls from the first accommodating cavity 2201, thereby realizing that the battery pack 210 is timely and smoothly removed and separated from the electrical equipment 200, avoiding the battery pack 210 that has thermal runaway from affecting other components of the electrical equipment 200, and ensuring the safe use of the electrical equipment 200.

[0074] In some embodiments, reference Fig. 9The self-unloading structure 100 further includes a buffer 50, which is disposed between the first connection portion 212 and the second connection portion 221. The connecting rod 20 penetrates the buffer 50 along the thickness direction X. The buffer 50 can form a gap between the opposing surfaces of the first connection portion 212 and the second connection portion 221 to prevent the friction loss caused by direct contact between the first connection portion 212 and the second connection portion 221 from affecting the service life. The buffer 50 can be a compressible component such as a spring or elastic foam.

[0075] In some embodiments, the present application embodiment provides an electric device 200, referring to Figure 13-14 as well as Fig.17 The electrical equipment 200 includes: a battery pack 210, a carrier 220, a controller 230, a communication harness 231, a control harness 232, and the self-unloading structure 100 as described above.

[0076] Reference Fig.17 The battery pack 210 includes a box body 211, a first connecting portion 212, a battery management component 213, a battery cell 214 and a collection harness 215. A second accommodating cavity 2110 is provided inside the box body 211, and the battery cell 214 and the battery management component 213 are arranged in the second accommodating cavity 2110 at intervals. Figure 1-2 , Figure 4 , Figure 6 to Figure 8 as well as Figure 14 to Figure 16 The first connection portion 212 is protrudingly disposed on the side surface 2111 of the box body 211, referring to Fig.17 One end of the collection harness 215 is connected to the battery cell 214 to collect data of the battery cell 214, and the other end of the collection harness 215 is connected to the battery management component 213 to transmit the collected data to the battery management component 213. The battery management component 213 includes a BMS (Battery Management System) and a BDU (Battery disconnect Unit). The battery management component 213 is used to collect the data collected by the collection harness 215. The collection harness 215 monitors the state of the battery cell 214 through sensors arranged on the battery cell 214. The sensors include voltage sensors, smoke detectors, temperature sensors, etc. The battery management component 213 monitors the voltage, smoke, temperature, etc. of the battery cell 214 through the collection harness 215.

[0077] Reference Figures 1 to 9 , the bearing member 220 includes a second connecting portion 221, referring to Figure 1-2 , Figure 4 , Figure 6 to Figure 9 as well as Fig.14 and Fig.17A first accommodating cavity 2201 is provided inside the carrier 220 , and the second connecting portion 221 is disposed in the first accommodating cavity 2201 . The second connecting portion 221 and the first connecting portion 212 are overlapped along the thickness direction X.

[0078] Reference Fig.17 The controller 230 is disposed on the carrier 220, and the controller 230 is located outside the first accommodating cavity 2201. One end of the communication harness 231 is connected to the battery management component 213, and the other end is connected to the controller 230. One end of the control harness 232 is connected to the self-unloading structure 100. Specifically, one end of the control harness 232 is connected to the driving member 10 in the self-unloading structure 100, and the other end of the control harness 232 is connected to the controller 230. The controller 230 controls the driving member 10 to start through the control harness 232, thereby controlling the Figure 1 to Figure 7 The connecting rod 20 in the embodiment shown in FIG. 1 extends or contracts along the thickness direction X, or controls the connecting rod 20 as shown in FIG. Figure 8 to Figure 12 The connecting rod 20 in the illustrated embodiment rotates to control the overlap or separation between the first connecting portion 212 and the second connecting portion 221 , thereby controlling the assembly or drop of the battery pack 210 in the first accommodating cavity 2201 .

[0079] Specifically, the battery management component 213 collects the voltage, smoke, temperature and other status data of the battery cell 214 through the collection harness 215, and the battery management component 213 transmits the collected data to the controller 230 in real time through the communication harness 231;

[0080] The controller 230 determines the operating state of the battery pack 210 by processing the data transmitted by the battery management component 213, that is, determines whether the battery cells 214 in the battery pack 210 have thermal runaway or abnormal conditions such as overcharge or over-discharge;

[0081] When the controller 230 determines that the battery cells 214 in the battery pack 210 are not abnormal according to the transmitted data, the controller 230 controls the driving member 10 in the dump structure 100 through the control harness 232, and the driving member 10 does not move, and the first connecting portion 212 and the second connecting portion 221 are kept in an overlapping state, and the battery pack 210 is kept in an assembled state in the carrier 220;

[0082] When the controller 230 determines that the battery cell 214 in the battery pack 210 is abnormal according to the transmitted data, the controller 230 controls the driving member 10 in the dump structure 100 through the control harness 232, and controls the driving member 10 to Figure 1 to Figure 7 The connecting rod 20 shown in FIG. 1 is contracted along the thickness direction X until the connecting rod 20 is disconnected from the first connecting portion 212, or the driving member 10 is controlled as follows: Figure 8 to Figure 12The connecting rod shown rotates until the connecting rod 20 releases the connection with the first connecting portion 212, so that the battery pack 210 falls from the first accommodating cavity 2201 of the supporting member 220 by its own weight, thereby preventing the abnormal situation of the battery pack 210 from affecting other components of the electrical equipment 200 and ensuring the safe use of the electrical equipment 200.

[0083] The technical solutions provided by the embodiments of the present invention are introduced in detail above. The principles and implementation methods of the present invention are explained in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A self-unloading structure, characterized in that: The self-unloading structure is used for loading and unloading the battery pack in the electrical equipment; The electrical equipment includes a battery pack and a carrier; A first accommodating cavity is provided inside the carrier, and the carrier includes a second connecting portion arranged in the first accommodating cavity; The battery pack is disposed in the first accommodating cavity, the battery pack comprises a box body, a first connecting portion is protrudingly disposed on the box body, the first connecting portion has a thickness direction, and the second connecting portion overlaps the first connecting portion along the thickness direction; The self-unloading structure is arranged in the first accommodating cavity, and comprises: A driving member, disposed on a side of the second connecting portion away from the first connecting portion in the thickness direction; A connecting rod, comprising a first connecting end and a second connecting end arranged opposite to each other in the thickness direction, wherein the first connecting end is connected to the driving member, and the driving member can drive the connecting rod to extend or retract in the thickness direction; Along the thickness direction, the connecting rod extends to the second connecting end, passes through the second connecting part and is connected to the first connecting part, so as to fix the battery pack in the first accommodating cavity; the connecting rod contracts until the connecting rod releases the connection with the first connecting part, the first connecting part is separated from the second connecting part, and the battery pack is separated from the carrier and falls.

2. The self-unloading structure according to claim 1, characterized in that: A first accommodating cavity is provided inside the first connecting portion, and the first connecting portion includes a first wall, and the first wall faces the second connecting portion in the thickness direction; The self-unloading structure further includes a sliding member, and the sliding member is arranged in the first accommodating cavity; Along the thickness direction, the connecting rod extends, and the second connecting end pushes the sliding member until the sliding member abuts against the first wall, and the connecting rod is connected to the first connecting part through the sliding member; the connecting rod contracts until the sliding member is separated from the first wall, thereby releasing the connection between the connecting rod and the first connecting part.

3. The self-unloading structure according to claim 2, characterized in that: The self-unloading structure also includes a receiving member; A second accommodating cavity is provided inside the accommodating member, the accommodating member penetrates the second connecting portion along the thickness direction and is inserted into the first accommodating cavity, and a second through hole is provided on the accommodating member located in the first accommodating cavity to connect the first accommodating cavity with the second accommodating cavity; The sliding member is disposed in the second accommodating cavity; The connecting rod is inserted in the second accommodating cavity. When the connecting rod is extended, the second connecting end pushes the sliding member, and part of the sliding member can be extended from the second through hole and abut against the first wall; when the connecting rod is retracted to the second connecting end and separated from the sliding member, the sliding member can be retracted from the second through hole into the second accommodating cavity and separated from the first wall.

4. The self-unloading structure according to claim 2 or 3, characterized in that: A first through hole communicating with the first accommodating cavity is formed on the first wall, and the first wall has an inner peripheral wall surrounding the first through hole along the circumference of the first through hole; The second connecting end pushes the sliding member, and the sliding member moves to abut against the inner peripheral wall; the second connecting end is separated from the sliding member, and the sliding member moves to separate from the inner peripheral wall; Wherein, the surface where the sliding member contacts the inner peripheral wall is a curved surface.

5. The self-unloading structure according to claim 4, characterized in that: The surface of the sliding member in contact with the second connection end is a curved surface, and / or the surface of the second connection end in contact with the sliding member is a curved surface.

6. The self-unloading structure according to claim 3, characterized in that: Along the thickness direction, a stopper is protrudingly provided on the surface of the sliding member facing the first wall; A first through hole communicating with the first accommodating cavity is formed on the first wall, and the first wall has an inner peripheral wall surrounding the first through hole along the circumference of the first through hole; The sliding member moves to abut against the inner peripheral wall, and the stopper abuts against the receiving member.

7. The self-unloading structure according to claim 2, characterized in that: The number of the sliding members is at least two, and at least two of the sliding members are arranged at intervals along the circumferential direction of the connecting rod.

8. The self-unloading structure according to claim 1, characterized in that: The driving member can drive the connecting rod to rotate and extend or contract along the thickness direction; Of the first connection portion and the second connection portion, at least the first connection portion is threadedly connected to the connecting rod.

9. The self-unloading structure according to claim 1, characterized in that: The driving member is arranged on the bearing member, or the driving member is arranged on the box body.

10. An electrical device, characterized in that: include: A battery pack, the battery pack comprising a box and a battery management assembly, the box being provided with a first connection portion protruding therefrom, the first connection portion having a thickness direction, and the battery management assembly being arranged inside the box; A carrier, wherein a second connecting portion is disposed on the carrier, and the second connecting portion is overlapped with the first connecting portion along the thickness direction; A controller, wherein the battery management component is communicatively connected to the controller; And, according to any one of claims 1 to 9, the driving member in the self-unloading structure is communicatively connected with the controller, and the controller drives the connecting rod to extend or retract along the thickness direction by controlling the driving member.

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