Locking device, battery assembly, electric device and locking mechanism

Abstract

The utility model provides a locking device, a battery assembly, a power utilization device and a locking mechanism, and belongs to the field of battery replacement. The locking device comprises a second lock body, a second locking part is arranged on the second lock body, and the second locking part and the second lock body are movably connected so as to be switched between the locking state and the unlocking state. The second locking part is used for being matched with the first locking part in the locking state and locking the first lock body and the second lock body, and the second locking part is used for being separated from the first locking part in the unlocking state and unlocking the first lock body and the second lock body. According to the battery assembly with the locking device, on one hand, the battery body and the vehicle can be quickly locked or separated, so that the battery replacement efficiency of the vehicle is improved, on the other hand, the locking device on the battery body is more convenient to maintain, the service life of the locking device is longer, and the battery assembly is more convenient to use. Therefore, the maintenance convenience and the use performance of the locking device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery replacement, in particular to a locking device, a battery assembly, an electric device and a locking mechanism. BACKGROUND

[0002] With the progress of science and technology, the battery industry has developed rapidly, and the market share and use frequency of electric devices are also increasing. Electrically driven vehicles such as electric vehicles are gradually appearing in various application scenarios, and in order to improve the convenience of electric devices, especially electrically driven vehicles, battery replacement stations for rapid battery replacement have appeared in the market. Since electric devices need to be frequently replaced, in the battery replacement process, the locking structure of the battery and the electric device needs to be locked and separated multiple times, which is prone to wear and tear, resulting in reduced service life and precision, causing inconvenience and safety hazards in battery replacement. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a locking device, a battery assembly, an electric device and a locking mechanism, which can improve the maintenance convenience and prolong the service life of the locking device.

[0004] In a first aspect, the embodiments of the present application provide a locking device, which is used in cooperation with a first lock body, the first lock body is provided with a first locking part, and the locking device comprises a second lock body, the second lock body is provided with a second locking part, and the second locking part is movably connected with the second lock body to switch between a locked state and an unlocked state; the second locking part is used to cooperate with the first locking part and lock the first lock body and the second lock body in the locked state, and the second locking part is used to separate from the first locking part and unlock the first lock body and the second lock body in the unlocked state.

[0005] In the technical scheme, the locking device is provided with the first lock body and the second lock body, the first lock body is adapted to be connected with the vehicle body and is provided with the first locking part, the second lock body is arranged on the battery body, and the second lock body is provided with the second locking part, the second locking part is movably connected with the second lock body, the second locking part can be matched with or separated from the first locking part, the first lock body and the second lock body can be in the locked state or the unlocked state, the battery body and the vehicle body can be switched between the locked state and the separated state, and the battery body on the vehicle can be easily replaced. In the related art, the nut is arranged on the vehicle, the bolt is arranged on the battery body, the bolt and the nut are directly stressed and matched to complete the battery replacement, the second lock body of the locking device is arranged on the battery body in the application, the convenience of replacement and maintenance of the locking device is higher, the battery replacement of the vehicle is completed by moving the second locking part in the second lock body to match and separate the second locking part from the first locking part in the application, the alignment of the nut on the vehicle and the bolt on the battery body does not need to be considered during the battery replacement, the battery replacement efficiency is improved, and the service life of the locking device is prolonged.

[0006] In some embodiments, the locking device further comprises a locking part arranged on the second lock body, the locking part is matched with the second locking part and is used to drive the second locking part to move in the direction of locking with the first locking part when the second lock body is in the locked state.

[0007] In the technical scheme, the locking part is arranged, the second locking part can move in the direction of locking or separating from the first locking part under the driving of the locking part, the first lock body and the second lock body can be in the locked state or the unlocked state, the battery can be easily and quickly separated from the vehicle body under the action of the locking part when the vehicle needs to be replaced, and the battery can also be easily locked and fixed on the vehicle body, the battery replacement efficiency of the locking device is higher, and the convenience is better.

[0008] In some embodiments, the locking device further comprises a locking part arranged on the second lock body, the locking part is matched with the second locking part and is used to drive the second locking part to move in the direction of locking with the first locking part when the second lock body is in the locked state.

[0009] In the technical scheme, the locking part is arranged, the second locking part can move in the direction of locking or separating from the first locking part under the driving of the locking part, the first lock body and the second lock body can be in the locked state or the unlocked state, the battery can be easily and quickly separated from the vehicle body under the action of the locking part when the vehicle needs to be replaced, and the battery can also be easily locked and fixed on the vehicle body, the battery replacement efficiency of the locking device is higher, and the convenience is better.

[0010] In some embodiments, the first lock body is formed with a support surface, the support surface is formed with a locking protrusion or a locking groove, and the second locking portion is configured to abut against the locking protrusion or be embedded into the locking groove in the locked state.

[0011] In the above technical solution, the locking protrusion or the locking groove is formed on the support surface, and the locking protrusion or the locking groove is matched with the second locking portion. The movement of the second locking portion relative to a part of the support surface can be limited, and thus a partial connection is formed between the second locking portion and the first lock body, so as to realize the further locking function of the locking device.

[0012] In some embodiments, the second locking portion includes a matching section movably connected with the second lock body, and a locking section connected with the matching section and formed with a matching protrusion configured to abut against the locking protrusion or be embedded into the locking groove in the locked state of the second locking portion.

[0013] In the above technical solution, the matching section and the locking section are provided, the matching section is movably connected with the second lock body, and the matching protrusion on the locking section is matched with the locking protrusion or the locking groove. The second locking portion can be connected with the second lock body and the first lock body, that is, the first lock body is only connected with the second locking portion on the battery, and thus the fixed connection between the first lock body and the second lock body can be realized. Therefore, the switching between the locked state and the unlocked state of the second lock body can be completed by only controlling the movement of the second locking portion, and thus the convenience of the locking and separation operation of the battery and the vehicle body is improved, and the battery swapping efficiency of the vehicle is improved. In addition, since the second locking portion, the locking portion, and the anti-loosening portion are all arranged on the second lock body, and the second lock body is arranged on the battery, the locking operation components of the locking device in the present application are all installed on the battery, and thus the maintenance and repair of the locking device are more convenient.

[0014] In some embodiments, the matching section is rotatably connected with the second lock body.

[0015] In the above technical solution, the matching section is rotatably connected with the second lock body, so that the movement of the locking section relative to the first lock body can be converted into the rotation of the matching section relative to the second lock body. Thus, when the battery is locked and fixed on the vehicle, the locking between the second lock body and the first lock body can be completed by driving the second locking portion to rotate, and thus the battery swapping precision requirement of the locking device in the present application is lower, the battery swapping success rate is higher, and the battery swapping speed is faster than that in the related art in which the nut on the vehicle and the bolt on the battery need to be precisely aligned to be connected.

[0016] In some embodiments, the matching section is switched from the unlocked state to the locked state after rotating relative to the second lock body by an angle α, and α satisfies 0° < α < 180°.

[0017] In the above technical solution, by switching the matching section from the unlocked state to the locked state, the rotation angle of the matching section relative to the second lock body is set within the above range, so that the locking section is driven by the matching section, and the rotation angle range of the locking section relative to the first lock body is the same as the rotation angle range of the matching section relative to the second lock body, so as to realize the abutting or embedding of the matching protrusion of the locking section into the locking recess, thereby facilitating easy locking of the second lock body with the first lock body, and saving the battery replacement time of the vehicle.

[0018] In some embodiments, a first rotation limiting portion is formed on the second lock body, and a second rotation limiting portion is formed on the matching section. The first rotation limiting portion cooperates with the second rotation limiting portion to limit the rotation angle of the matching section.

[0019] In the above technical solution, by forming the first rotation limiting portion on the second lock body and the second rotation limiting portion on the matching section, the rotation angle of the matching section relative to the second lock body can be limited, so that after the second locking portion rotates a certain angle relative to the first lock body, the second locking portion and the first lock body can be connected or separated in the circumferential direction, thereby realizing the further locking and unlocking functions of the locking device.

[0020] In some embodiments, the first rotation limiting portion is configured as an arc-shaped limiting slot extending around the matching section, and the second rotation limiting portion is configured as a limiting protrusion arranged on the outer circumferential surface of the matching section, and the limiting protrusion is accommodated in the arc-shaped limiting slot.

[0021] In the above technical solution, the matching section can rotate relative to the second lock body, so that the limiting protrusion moves in the arc-shaped limiting slot. When the arc-shaped limiting slot limits the further movement of the limiting protrusion, the rotation of the matching section relative to the second lock body can be limited correspondingly, so that after the second locking portion rotates a certain angle relative to the second lock body, the second locking portion and the first lock body are connected or separated in the circumferential direction, thereby realizing the further locking and unlocking functions of the locking device.

[0022] In some embodiments, the matching protrusion is configured as a plurality of matching protrusions, and the locking protrusion is configured as a plurality of locking protrusions. The plurality of matching protrusions are used to correspondingly cooperate with the plurality of locking protrusions, or the locking recess is configured as a plurality of locking recesses, and the plurality of matching protrusions are used to correspondingly cooperate with the plurality of locking recesses.

[0023] In the above technical solution, by configuring the matching protrusion as a plurality of matching protrusions, and configuring the locking protrusion or the locking recess as a plurality of locking protrusions, the locking section can be connected or separated from the first lock body through the plurality of locking protrusions or the plurality of locking recesses, thereby increasing the limiting strength of the rotation of the second locking portion relative to the first lock body, and further ensuring that the second locking portion and the first lock body have sufficient locking strength, thereby improving the locking stability between the battery and the vehicle body.

[0024] In some embodiments, the support surface is formed with a through hole, the fitting protrusion is configured to coincide with a projection of the through hole in the fitting segment extension direction in the unlocked state, and the fitting protrusion is configured to at least partially coincide with a projection of the support surface in the fitting segment extension direction in the locked state.

[0025] In the above technical solution, the fitting protrusion can pass through the through hole and cooperate with the locking protrusion or the locking groove to jointly achieve the connection of the first lock body to the second locking part, thereby further achieving the locking of the second lock body to the first lock body with high locking efficiency and strength.

[0026] In some embodiments, the locking part is formed with a fitting hole, at least part of the second locking part is arranged in the fitting hole, a first thread is arranged on an inner circumferential wall of the fitting hole, and at least part of an outer circumferential wall of the second locking part is formed with a second thread matched with the first thread.

[0027] In the above technical solution, the first thread is arranged on the inner circumferential wall of the fitting hole, and the second thread is formed on at least part of the outer circumferential wall of the second locking part, so that the second thread can be matched with the first thread, thereby achieving that the locking part can drive the fitting segment to rotate, and further enabling the second locking part to move towards a direction of locking or unlocking the second lock body to the first lock body, to efficiently achieve the locking or separation of the battery and the vehicle body.

[0028] In some embodiments, the anti-loosening part includes a support member arranged on the second lock body and formed with a first limiting part, and a connecting member arranged on the locking part and formed with a second limiting part matched with the first limiting part, the first limiting part and the second limiting part being matched to limit the rotation between the support member and the connecting member.

[0029] In the above technical solution, the support member and the connecting member are arranged to enable the first limiting part of the support member to be matched with the second limiting part of the connecting member to limit the rotation between the support member and the connecting member, thereby limiting the rotation of the locking part relative to the second lock body after the second locking part is closely connected to the first lock body, and further increasing the locking strength of the locking device and improving the connection reliability between the battery and the vehicle body, so that the battery works more safely during driving.

[0030] In some embodiments, the locking part is formed with a guide segment, the connecting member is sleeved on an outer circumference of the guide segment, a first circumferential limiting part is arranged on the outer circumference of the guide segment, a second circumferential limiting part matched with the first circumferential limiting part is formed on the connecting member, and the first circumferential limiting part and the second circumferential limiting part are matched to limit the circumferential movement of the locking part and the guide segment.

[0031] In the technical solution, the second circumferential limiting part of the connecting piece is matched with the first circumferential limiting part of the guiding segment of the locking part, so that the circumferential movement of the locking part and the guiding segment is limited, the locking part cannot continue to drive the second locking part to rotate, and the locking state of the second lock body and the first lock body is maintained, thereby ensuring the connection stability between the battery and the first lock body. In addition, the connecting piece is sleeved on the outer periphery of the guiding segment, so that the connecting piece can move along the outer periphery of the guiding segment in the axial direction of the locking part, and the first limiting part of the supporting piece and the second limiting part of the connecting piece can be easily separated to release the rotation limitation of the locking part by the anti-loosening part, thereby improving the unlocking efficiency of the locking device and further saving the battery replacement time.

[0032] In some embodiments, the first circumferential limiting part is configured as a spline formed on the outer periphery of the guiding segment and extending in the axial direction of the guiding segment, and the second circumferential limiting part is configured as a spline groove arranged on the connecting piece and adapted to be matched with the spline.

[0033] In the technical solution, the first circumferential limiting part is configured as a spline, and the second circumferential limiting part is configured as a spline groove, so that the connection between the connecting piece and the locking part is reliable, and the force on the contact surface is uniform, thereby further dispersing the force on the locking part and the second locking part, improving the carrying capacity of the locking device, prolonging the service life of the locking device, and saving the maintenance cost.

[0034] In some embodiments, the locking device further comprises an elastic member arranged between the locking part and the connecting piece and adapted to drive the connecting piece to move towards the supporting piece.

[0035] In the technical solution, when the second locking part and the first lock body are locked, the elastic member has a rebounding tendency, the connecting piece can be pushed to tightly contact the supporting piece under the elastic force of the elastic member, and the rotation between the supporting piece and the connecting piece is limited under the cooperation of the first limiting part of the supporting piece and the second limiting part of the connecting piece, so as to further improve the locking strength of the anti-loosening part on the locking device.

[0036] In some embodiments, the first limiting part and the second limiting part are respectively configured as a first limiting tooth and a second limiting tooth.

[0037] In the technical solution, the first limiting tooth and the second limiting tooth are engaged to realize the connection between the supporting piece and the connecting piece, so that the supporting piece and the connecting piece cannot rotate relative to each other, and further, the supporting piece and the connecting piece are arranged on the second lock body and the locking part respectively, so that the second lock body and the locking part cannot rotate, and the locking part cannot rotate in the locked state to avoid the disengagement between the second locking part and the first locking part, thereby ensuring the reliability of the locking device.

[0038] In some embodiments, the support is formed with a first guide slope towards one end of the connecting piece, the connecting piece is formed with a second guide slope towards one end of the support, the first guide slope is formed with a first limiting part, and the second guide slope is formed with a second limiting part.

[0039] In the above technical solution, the first guide slope and the second guide slope are respectively arranged on the support and the connecting piece, and after the first guide slope cooperates with the second guide slope, the coaxiality of the second lock body and the locking part can be ensured, when the second lock body and the locking part are not coaxial, the second lock body is coaxial with the locking part under the action of the first guide slope and the second guide slope, so that the reliable torque transmission is ensured.

[0040] In some embodiments, the first guide slope is inclined towards the connecting piece in a direction away from the center of the support in the radial direction, and the second guide slope is inclined away from the support in a direction away from the center of the connecting piece in the radial direction.

[0041] In the above technical solution, the first guide slope and the second guide slope can realize the positioning of the locking part and the second lock body, improve the precision in the locking or unlocking process of the locking device, thereby reducing the wear of the parts and improving the service life of the locking device.

[0042] In some embodiments, a flexible piece is arranged between the locking part and the second locking part.

[0043] In the above technical solution, the flexible piece can be in interference fit with the locking part and the second locking part respectively, the deformation of the flexible piece causes the friction force between the flexible piece and the locking part and the second locking part, when the locking part is driven to move by the external driving device, the movement of the second locking part is driven through the flexible piece. In the process of switching the locking device from the unlocking state to the locking state, the locking part is driven to rotate, and the second locking part moves synchronously under the conduction of the flexible piece until it moves to cooperate with the first locking part. Further rotating the locking part, the relative movement between the locking part and the second locking part drives the second locking part to move closer between the second lock body and the first lock body, so as to realize the fastening between the first lock body and the second lock body.

[0044] In some embodiments, a cooperating hole is formed in the locking part, a cooperating section is formed on the second locking part, and the flexible piece is arranged at least part of the outer periphery of the cooperating section and abuts against the inner wall of the cooperating hole and the outer peripheral wall of the cooperating section respectively.

[0045] In the above technical solution, the flexible piece abuts against the outer peripheral wall of the cooperating section and the inner peripheral wall of the cooperating hole respectively, and the torque between the second locking part and the cooperating section is transmitted through the friction force between the flexible piece and the inner peripheral wall of the cooperating hole to realize the unlocking and locking process of the locking device.

[0046] In some embodiments, the flexible piece is configured as a rubber ring.

[0047] In the above technical solution, the rubber ring has a long service life and good wear resistance, which can greatly improve the service life of the locking device and reduce the maintenance cost of the locking device.

[0048] In a second aspect, the embodiments of the present application also provide a battery assembly, comprising a battery body and a locking device, the locking device being connected to the battery body.

[0049] In a third aspect, the electric device comprises a first lock body and a battery assembly, the first lock body and the locking device being connected to each other to detachably connect the battery body to the electric device.

[0050] In a fourth aspect, the locking mechanism comprises a first lock body and a locking device which can be connected to each other. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0052] Figure 1 The locking device, the battery assembly and the electric device provided by some embodiments of the present application are shown in the schematic diagram.

[0053] Figure 2 The locking device, the first lock body and the battery assembly provided by some embodiments of the present application are shown in the schematic diagram.

[0054] Figure 3 The locking device and the battery assembly provided by some embodiments of the present application are shown in the schematic diagram.

[0055] Figure 4 The locking device provided by some embodiments of the present application is shown in the front view.

[0056] Figure 5 is Figure 4 is the B-B sectional view.

[0057] Figure 6 The locking device on the battery provided by some embodiments of the present application is shown in the front view.

[0058] Figure 7 is Figure 6 is the A-A sectional view.

[0059] Figure 8 The locking device on the battery assembly provided by some embodiments of the present application is shown in the exploded view.

[0060] Figure 9 An isometric view of the locking device on the battery assembly provided by some embodiments of the present application;

[0061] Figure 10 A bottom view of the locking device on the battery assembly provided by some embodiments of the present application;

[0062] Figure 11 A top view of the locking device on the battery assembly provided by some embodiments of the present application.

[0063] Reference signs:

[0064] Locking device 1, battery assembly 2, electric device 3;

[0065] First lock body 11, elastic member 15, spring stopper 16;

[0066] Second lock body 12, second locking part 121, matching section 1211, locking section 1212, matching protrusion 1213, first rotation limiting part 122, second rotation limiting part 1214;

[0067] Locking part 13, first circumferential limiting part 131;

[0068] Supporting member 141, connecting member 142, second circumferential limiting part 1421. DETAILED DESCRIPTION

[0069] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover not exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0071] Reference to "an embodiment" or "the embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" or "in the embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive.

[0072] In the description of the application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0073] The term "and / or" in this application only describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0074] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0075] "Multiple" appearing in this application means more than two (including two).

[0076] In this application, the battery assembly 2 contains battery cells, which can include lithium ion secondary batteries, lithium ion primary batteries, lithium-sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc. The embodiments of the application are not limited to this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the application are not limited to this. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the embodiments of the application are not limited to this.

[0077] The battery assembly referred to in the embodiments of the application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application can include a battery module or a battery assembly, etc. The battery generally includes a box for packaging one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

[0078] The battery cell includes a housing, an electrode assembly, and an electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that the fuse does not occur when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0079] The material of the separator can be PP (polypropylene) or PE (polyethylene) or the like. In addition, the electrode assembly can be a roll structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0080] With the progress of science and technology, new energy vehicles have developed rapidly, and the market share and use frequency of electric vehicles have also become higher and higher. Electric commercial vehicles in electric vehicles, such as electric heavy trucks and electric light trucks, gradually appear in various application scenarios, and also match the battery assembly replacement station for electric trucks.

[0081] The utility model person found that, because electric truck load is heavy, the mileage is long, its energy consumption is bigger than common passenger car, therefore, in order to realize the endurance, electric truck needs to carry out the action of replacing electricity frequently, and in the battery pack and truck locking and separating of replacing electricity link, the locking and separating of battery pack and truck are the focus of attention. In order to realize the locking and fixing of battery pack, the currently mainly used mode is to install nut on the truck, install bolt on the battery pack, and the locking of battery pack is completed by the connection of nut and bolt. The locking and separating of battery pack and truck need the cooperation of nut on the vehicle and bolt on the battery pack to complete, and the frequent replacement of electricity can easily cause the nut to slip, and the nut is arranged on the vehicle, so that the nut is not easy to replace, causing maintenance difficulty, and because the bolt and nut are directly stressed when replacing electricity, the service life of the nut and bolt is further reduced. In addition, when locking the battery pack on the vehicle, the alignment accuracy between the nut and bolt also needs to be concerned, thereby causing low replacement efficiency.

[0082] Based on the above consideration, in order to solve the technical problems of low service life of the locking device between the battery pack and the vehicle, and high maintenance difficulty and cooperation accuracy, the utility model person designs a locking device through in-depth research, the locking device comprises a second lock body, the second lock body is provided with a second locking part, and the second locking part is movably connected with the second lock body to switch between the locked state and the unlocked state. The second locking part is used for cooperating with the first locking part and locking the first lock body and the second lock body in the locked state, and the second locking part is used for separating from the first locking part and unlocking the first lock body and the second lock body in the unlocked state.

[0083] In the above technical scheme, the locking device is provided with a locking part, so that the second locking part can move towards the direction of locking or separating from the first locking part under the driving of the locking part, so as to realize the formation of the locked state or the unlocked state between the first lock body and the second lock body, and then when the electric device needs to replace electricity, the battery pack can be easily and quickly separated from the vehicle body under the action of the locking part, and the battery pack can also be easily locked and fixed on the vehicle body. The replacement efficiency of the locking device is higher, and the convenience is better.

[0084] The electric device disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to this. The locking device, the battery pack 2 and the like disclosed in the application can be used, so that the application range of the locking device is improved, the assembly difficulty between the battery pack 2 and the electric device is reduced, the service life of the locking device is improved, the replacement efficiency of the electric device is improved, the precision requirement in the replacement process is reduced, and the locking device is easy to maintain.

[0085] The locking device disclosed by the embodiments of the present application can be used in, but is not limited to, battery assemblies, battery monomers and other energy supply devices. In this way, the application range of the locking device is improved, the assembly difficulty between the energy supply device and the electric device is reduced, the service life of the locking device is improved, the battery replacement efficiency of the electric device is improved, the precision requirement in the battery replacement process is reduced, and the locking device is easy to maintain.

[0086] As shown in Figure 1 The embodiments of the present application provide a power device using a battery assembly 2 as a power supply. The power device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric plane toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, and the like.

[0087] In some embodiments of the present application, the power device can be a vehicle, which can be a fuel car, a gas car or a new energy car. The new energy car can be a pure electric car, a hybrid car or a range extended car. The vehicle is internally provided with a battery assembly 2, which can be connected to the bottom, head or tail of the vehicle through the locking device. The battery assembly 2 can be used for power supply of the vehicle, for example, the battery assembly 2 can be used as the operating power supply of the vehicle. The vehicle can also include a controller and a motor, and the controller is used to control the battery assembly 2 to supply power to the motor, for example, for the working power demand of the vehicle during starting, navigation and driving.

[0088] In some embodiments of the present application, the battery assembly 2 can not only be used as the operating power supply of the vehicle, but also be used as the driving power supply of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle.

[0089] As shown in Figure 2 The battery assembly 2 is provided. The battery assembly 2 includes a battery body and a locking device 1, and the locking device 1 is connected with the battery body. Therefore, when the battery assembly 2 is unlocked and locked with the electric device, the locking and unlocking efficiency of the battery assembly 2 and the electric device is high under the action of the locking device 1, the stability of the battery assembly 2 after locking is good, the maintenance of the battery assembly 2 is more simple, and the maintenance cost is low.

[0090] In the battery assembly 2, the battery body can be connected in series, parallel or mixed between a plurality of battery monomers, and the mixed connection means that there are series and parallel connections among the plurality of battery monomers. The plurality of battery monomers can be directly connected in series, parallel or mixed together, and then the whole of the plurality of battery monomers is formed; of course, the battery assembly 2 can also be that a plurality of battery monomers are connected in series, parallel or mixed to form a battery module, and a plurality of battery modules are connected in series, parallel or mixed to form a whole. The battery assembly 2 can also include other structures, for example, the battery assembly 2 can also include a current collection component for realizing the electrical connection between the plurality of battery monomers.

[0091] As shown in Figure 8 The locking mechanism provided. The locking mechanism according to the present application comprises a first lock body 11 and a locking device 1, the first lock body 11 is formed with a first locking part, and the first lock body 11 can be connected with the vehicle body. Since the locking mechanism according to the present application is provided with the locking device 1 of any one of the above embodiments, the locking mechanism has good connection stability, is more convenient to maintain, has lower maintenance cost, and has low requirements for matching precision and stable and reliable locking.

[0092] The locking device 1 according to the embodiments of the present application will be described below with reference to Figures 1-11

[0093] The locking device 1 according to the present application, the first lock body 11 is suitable for being connected with the vehicle body, and the first lock body 11 is formed with a first locking part. The locking device 1 comprises a second lock body 12, the second lock body 12 of the present application is arranged on the battery assembly 2, and the second lock body 12 can form a locking state or an unlocking state with the first lock body 11 to respectively realize the locking and fixing or separation between the battery assembly 2 and the vehicle body. The second lock body 12 is provided with a second locking part 121, and the second locking part 121 is movably connected with the second lock body 12, so that the second lock body 12 can be switched between the locking state and the unlocking state; the second locking part 121 of the present application cooperates with the first locking part in the locking state, and locks the first lock body 11 and the second lock body 12 to realize the locking and fixing of the battery assembly 2 on the vehicle body. The second locking part 121 is separated from the first locking part in the unlocking state, and unlocks the first lock body 11 and the second lock body 12 to realize the separation between the battery assembly 2 and the vehicle body.

[0094] ​The locking device 1 of the present application is provided with a first lock body 11 and a second lock body 12, the first lock body 11 is adapted to be connected with the vehicle body and is formed with a first locking portion, and the second lock body 12 is arranged on the battery assembly 2 and is formed with a second locking portion 121, wherein the second locking portion 121 is movably connected with the second lock body 12, so that the second locking portion 121 can be matched with or separated from the first locking portion, thereby the first lock body 11 and the second lock body 12 can be formed in a locked state or an unlocked state, that is, the battery assembly 2 and the vehicle body can be switched between the locked state and the unlocked state, thereby the battery assembly 2 on the vehicle can be easily replaced. In the related art, a nut is arranged on the vehicle and a bolt is arranged on the battery assembly 2, and the nut and the bolt are directly stressed and matched to complete the battery replacement. In the present application, the second lock body 12 of the locking device 1 is arranged on the battery assembly 2, so that the locking device 1 has higher convenience in replacement and maintenance, and in the present application, the battery replacement of the vehicle is completed by moving the second locking portion 121 in the second lock body 12 to match and separate the second locking portion 121 with the first locking portion, so that the alignment of the nut on the vehicle with the bolt on the battery assembly 2 is not needed during the battery replacement, thereby the battery replacement efficiency is improved and the service life of the locking device 1 is prolonged.

[0095] In addition, in one specific embodiment of the present application, the second lock body 12 is configured as a sleeve, the sleeve is formed with an accommodating cavity, and the accommodating cavity is open at both ends in the axial direction of the sleeve, and at least part of the second locking portion 121 is accommodated in the accommodating cavity.

[0096] In another specific embodiment of the present application, the connection between the second lock body 12 and the battery assembly 2 is achieved by using four bolts to be fastened on the battery assembly 2, and the second lock body 12 is formed with a fastening matching portion protruding radially at one end in the axial direction, and the fastening matching portion is formed with four spaced fastening holes corresponding to the bolts.

[0097] According to one embodiment of the present application, the locking device 1 further comprises a locking part 13. In the present application, the locking part 13 is arranged in the second lock body 12, more specifically, the locking part 13 is arranged in the accommodating cavity of the second lock body 12, and the locking part 13 is movable relative to the second lock body 12 to drive the second locking part 121 to move. Further, the locking part 13 cooperates with the second locking part 121, and the locking part 13 is suitable for driving the second locking part 121 to move towards the direction of locking with the first locking part when the second lock body 12 is in the locked state, so as to lock the first lock body 11 and the second lock body 12, and then realize locking and fixing the battery assembly 2 on the vehicle body. Correspondingly, it needs to be explained that when it is needed to switch the second lock body 12 to the unlocked state, the locking part 13 can drive the second locking part 121 to move towards the direction of separating from the first locking part, so as to unlock the first lock body 11 and the second lock body 12, and then the connection between the battery assembly 2 and the vehicle body can be disconnected, and the battery assembly 2 can be replaced from the vehicle. By arranging the locking part 13, the second locking part 121 can move towards the direction of locking or separating from the first locking part under the driving of the locking part 13, so as to realize the formation of the locked state or the unlocked state between the first lock body 11 and the second lock body 12, and then when the vehicle needs to be replaced, the low-battery battery assembly 2 can be easily and quickly separated from the vehicle body under the action of the locking part 13, and the full-battery battery assembly 2 can also be easily locked and fixed on the vehicle body, the replacement efficiency of the locking device 1 is higher, and the convenience is better.

[0098] According to one embodiment of the present application, the locking device 1 further comprises an anti-loosening part. The anti-loosening part strengthens the locking strength of the locking device 1 and prevents loosening. The anti-loosening part is arranged on the second lock body 12. The anti-loosening part selectively connects the locking part 13 and the second lock body 12 to limit the movement of the locking part 13 relative to the second lock body 12. More specifically, when the locking part 13 drives the second locking part 121 to move towards the direction of locking with the first locking part, so that the second locking part 121 is tightly connected with the first lock body 11, the anti-loosening part can connect the locking part 13 and the second lock body 12, so that the movement of the locking part 13 relative to the second lock body 12 is limited, and the movement of the second locking part 121 relative to the second lock body 12 is also limited, so that the components of the locking device 1 are locked; when it is needed to separate the battery assembly 2 from the vehicle body, the anti-loosening part can disconnect the connection between the locking part 13 and the second lock body 12, so that the locking part 13 can move relative to the second lock body 12 again to drive the second locking part 121 to move, and the tight connection between the second locking part 121 and the first lock body 11 is disconnected, so that the locking device 1 is unlocked. Therefore, by arranging the anti-loosening part, the locking state between the second lock body 12 and the first lock body 11 is more stable, the reliability of the locking device 1 is improved, and the locking strength between the battery assembly 2 and the vehicle body is increased. When the vehicle is running, the battery assembly 2 and the vehicle can be connected more firmly, and the safety is higher. In addition, the anti-loosening part also makes the cooperation between the locking part 13 and the second locking part 121 become an interval force, so as to prolong the service life of the locking part 13 and the second locking part 121, and improve the use performance of the locking device 1.

[0099] According to one embodiment of the present application, the first lock body 11 is formed with a supporting surface. In the present application, the supporting surface can be formed with a locking protrusion, and the supporting surface can also be formed with a locking groove. In the locked state, the second locking part 121 abuts against the locking protrusion or is embedded into the locking groove, and the locking protrusion and the locking groove limit the second locking part 121. By forming the locking protrusion or the locking groove on the supporting surface and cooperating the locking protrusion or the locking groove with the second locking part 121, the movement of the second locking part 121 relative to a part of the supporting surface can be limited, so that the second locking part 121 is partially connected with the first lock body 11 to realize the further locking function of the locking device 1.

[0100] According to one embodiment of the present application, the second locking part 121 comprises a matching section 1211 and a locking section 1212. In the present application, the matching section 1211 is formed on a section of the second locking part 121 close to the second lock body 12, and the matching section 1211 is movably connected with the second lock body 12 to enable the second locking part 121 as a whole to move towards a direction to make the second lock body 12 lock or unlock with the first lock body 11; in the present application, the locking section 1212 is formed on another section of the second locking part 121 away from the second lock body 12, and the locking section 1212 is connected with the matching section 1211, and the locking section 1212 is formed with a matching protrusion 1213, and in the locking state of the second locking part 121, the matching protrusion 1213 is in abutment or embedded into the locking groove to realize the limiting effect of the locking protrusion or the locking groove on the second locking part 121. By movably connecting the matching section 1211 with the second lock body 12 and matching the matching protrusion 1213 on the locking section 1212 with the locking protrusion or the locking groove, the second locking part 121 can be connected with the second lock body 12 and the first lock body 11, that is, the first lock body 11 can be connected with the second locking part 121 on the battery assembly 2 only, and the fixed connection between the first lock body 11 and the second lock body 12 can be realized, so that the switching of the second lock body 12 between the locking state and the unlocking state can be completed by controlling the movement of the second locking part 121 only, and the convenience of locking and separating the battery assembly 2 and the vehicle body is improved, and the battery swapping efficiency of the vehicle is improved. In addition, since the second locking part 121, the locking part 13 and the anti-loosening part of the present application are all arranged on the second lock body 12, and the second lock body 12 is arranged on the battery assembly 2, the locking operation components of the locking device 1 in the present application are all mounted on the battery assembly 2, which is more convenient for the maintenance and repair of the locking device 1.

[0101] According to one embodiment of the present application, the matching section 1211 of the second locking part 121 is rotatably connected with the second lock body 12. Further, the rotation of the matching section 1211 can drive the locking section 1212 to rotate, so that the matching protrusion 1213 on the locking section 1212 can be connected with or separated from the locking protrusion or the locking groove. Therefore, by rotatably connecting the matching section 1211 with the second lock body 12, the movement of the locking section 1212 relative to the first lock body 11 can be converted into the rotation of the matching section 1211 relative to the second lock body 12, so that the locking between the second lock body 12 and the first lock body 11 when the battery assembly 2 is locked and fixed on the vehicle can be completed by driving the second locking part 121 to rotate, and the high-precision alignment required for connecting the nut on the vehicle with the bolt on the battery assembly 2 in the related art is not required in the present application, the battery swapping precision requirement of the locking device 1 in the present application is lower, the battery swapping success rate is higher, and the battery swapping speed is faster.

[0102] According to one embodiment of the present application, the cooperation section 1211 is switched to the locking state after rotating by an angle a relative to the second lock body 12 in the unlocking state, wherein a satisfies: 0° < a < 180°. By switching the cooperation section 1211 from the unlocking state to the locking state, the rotation angle of the cooperation section 1211 relative to the second lock body 12 is set in the above range, so that the rotation angle range of the locking section 1212 relative to the first lock body 11 driven by the cooperation section 1211 is the same as the rotation angle range of the cooperation section 1211 relative to the second lock body 12, so as to realize the cooperation protrusion 1213 of the locking section 1212 abutting or being embedded into the locking groove, thereby more facilitating easy locking of the second lock body 12 and the first lock body 11, and more facilitating saving of the battery replacement time of the vehicle.

[0103] According to one embodiment of the present application, the second lock body 12 is formed with a first rotation limiting portion 122, the cooperation section 1211 is formed with a second rotation limiting portion 1214, and the second rotation limiting portion 1214 can cooperate with the first rotation limiting portion 122 to jointly limit the rotation angle of the cooperation section 1211 relative to the second lock body 12. Similarly, by forming the first rotation limiting portion 122 on the second lock body 12 and the second rotation limiting portion 1214 on the cooperation section 1211, the rotation angle of the cooperation section 1211 relative to the second lock body 12 can be limited, so that when the second locking portion 121 rotates by a certain angle relative to the first lock body 11 in the circumferential direction, the second locking portion 121 and the first lock body 11 can be connected or separated in the circumferential direction, so as to realize the further locking and unlocking functions of the locking device 1.

[0104] According to one embodiment of the present application, the first rotation limiting portion 122 is configured as an arc-shaped limiting groove extending around the cooperation section 1211, and further, the first rotation limiting portion 122 is formed on the inner circumferential wall of the second lock body 12, i.e., at least part of the inner circumferential wall of the second lock body 12 is recessed in the radial direction to form an arc-shaped limiting groove. The second rotation limiting portion 1214 is configured as a limiting protrusion provided on the outer circumferential surface of the cooperation section 1211, and the limiting protrusion is accommodated in the arc-shaped limiting groove. Further, the cooperation section 1211 can rotate relative to the second lock body 12 to move the limiting protrusion in the arc-shaped limiting groove, and when the arc-shaped limiting groove limits the limiting protrusion from continuing to move, correspondingly, the rotation of the cooperation section 1211 relative to the second lock body 12 can be limited, so as to realize the connection or separation of the second locking portion 121 and the first lock body 11 in the circumferential direction after the second locking portion 121 rotates by a certain angle relative to the second lock body 12, so as to realize the further locking and unlocking functions of the locking device 1.

[0105] According to one embodiment of the present application, the matching protrusions 1213 on the locking segment 1212 are configured as a plurality; correspondingly, the locking protrusions can also be configured as a plurality, and each locking protrusion matches with a corresponding matching protrusion 1213, that is, each matching protrusion 1213 abuts against a corresponding locking protrusion when the second locking portion 121 is in the locked state; the locking grooves can also be configured as a plurality, and each locking groove matches with a corresponding matching protrusion 1213, that is, each matching protrusion 1213 is embedded into a corresponding locking groove when the second locking portion 121 is in the locked state. By configuring the matching protrusions 1213 as a plurality, and configuring the locking protrusions or the locking grooves as a plurality, the locking segment 1212 can be connected or separated from the first lock body 11 through a plurality of locking protrusions or locking grooves, which increases the restriction strength of the rotation of the second locking portion 121 relative to the first lock body 11, thereby further ensuring that the second locking portion 121 has sufficient locking strength with the first lock body 11, and further improving the locking stability between the battery assembly 2 and the vehicle body.

[0106] In one specific embodiment of the present application, the matching protrusions 1213 on the locking segment 1212 are configured as two, and the two matching protrusions 1213 are symmetrically arranged at the free end of the locking segment 1212, and the locking segment 1212 is formed as a similar "T-shaped" structure. The "T-shaped" locking segment 1212 has strong rigidity and stability, and is convenient for processing and production.

[0107] According to one embodiment of the present application, the support surface is formed with a through hole suitable for the mating protrusion 1213 to pass through, and the locking protrusion or the locking groove is arranged at the outer periphery of the through hole. It can be understood that, when the mating protrusion 1213 passes through the through hole, by driving the second locking part 121 to rotate by a certain angle, the mating protrusion 1213 is stopped by the locking protrusion or is embedded into the locking groove, and then the mating protrusion 1213 cannot pass through the through hole directly, so that the first lock body 11 is limited to be connected between the mating protrusion 1213 and the mating section 121 on the second locking part 121, at this time, the relative circumferential position between the second locking part 121 and the first lock body 11 is fixed, and the second locking part 121 can only move axially relative to the first lock body 11, that is, only the axial movement of the second locking part 121 needs to be controlled to complete the locking of the second lock body 12 and the first lock body 11; correspondingly, when the second lock body 12 and the first lock body 11 need to be unlocked, the second locking part 121 is first controlled to move axially, and then the second locking part 121 is driven to rotate by a certain angle, so that the mating protrusion 1213 is separated from the locking protrusion or the locking groove, and the mating protrusion 1213 can pass through the through hole directly, so that the second locking part 121 and the first lock body 11 can be separated to complete the unlocking. Therefore, by forming the through hole on the support surface, the mating protrusion 1213 can pass through the through hole and cooperate with the locking protrusion or the locking groove to connect the first lock body 11 to the second locking part 121, so that the locking of the second lock body 12 and the first lock body 11 can be further realized, and the locking efficiency is high and the strength is large.

[0108] According to one embodiment of the present application, in the unlocked state, the projection of the mating protrusion 1213 and the through hole in the extension direction of the mating section 1213 coincides, more specifically, at this time, the mating protrusion 1213 can pass through the through hole directly and easily, so that the second locking part 121 and the first lock body 11 are separated, the second lock body 12 and the first lock body 11 are unlocked, and the connection between the battery assembly 2 and the vehicle body is disconnected, and the cooperation of the mating protrusion 1213 and the through hole improves the unlocking performance of the locking device 1; in the locked state, at least part of the mating protrusion 1213 coincides with the projection of the support surface in the extension direction of the mating section 1213, more specifically, at this time, at least part of the mating protrusion 1213 is blocked by the support surface, and the mating protrusion 1213 cannot pass out of the through hole, so that the second lock body 12 and the first lock body 11 are in a stable locked state, and the battery assembly 2 is firmly locked on the vehicle body, and the cooperation of the mating protrusion 1213 and the through hole improves the locking performance of the locking device 1.

[0109] According to one embodiment of the present application, the locking portion 13 is formed with a matching hole, at least part of the second locking portion 121 is arranged in the matching hole, the inner circumferential wall of the matching hole is arranged with a first thread, at least part of the outer circumferential wall of the second locking portion 121 is formed with a second thread, the second thread can cooperate with the first thread, so that under the action of the thread, the locking portion 13 rotates to drive the matching section 1211 to rotate synchronously. By arranging the first thread on the inner circumferential wall of the matching hole and forming the second thread on at least part of the outer circumferential wall of the second locking portion 121, the second thread can cooperate with the first thread, so that the locking portion 13 can drive the matching section 1211 to rotate, and the second locking portion 121 can move towards the direction of locking or unlocking the second lock body 12 and the first lock body 11, to efficiently realize the locking or separation of the battery assembly 2 and the vehicle body.

[0110] Further, the locking process of the second lock body 12 and the first lock body 11 in the present application is as follows: the second locking portion 121 first passes through the communication hole on the first lock body 11, at this time the driving locking portion 13 and the second locking portion 121 are moved in the axial direction to the second lock body 12 direction by a certain distance, until the locking portion 13 touches the inner wall of the end of the first lock body 11 which is axially close to the first lock body 11, then through the cooperation of the second thread and the first thread, the locking portion 13 rotates in the first rotation direction to drive the second locking portion 121 to rotate by a certain angle, so that the matching protrusion 1213 is in abutment or embedded into the locking groove, or the second rotation limiting portion 1214 is stopped in the first rotation limiting portion 122, at this time the relative circumferential position of the second locking portion 121 and the first lock body 11 is fixed, and the first lock body 11 is connected to the second locking portion 121, since the locking portion 13 can only rotate relative to the second lock body 12, and the second locking portion 121 cannot rotate any more, therefore, continuing to rotate the locking portion 13 can make the second locking portion 121 move only in the axial direction, to adjust the distance between the matching protrusion 1213 and the supporting surface, realize the close fit of at least part of the surface on the first lock body 11 and the battery assembly 2 which faces each other, finally the anti-loosening portion connects the locking portion 13 and the second lock body 12, so that the locking portion 13 no longer moves relative to the second lock body 12, thereby completing the locking and fixing of the battery assembly 2 on the vehicle.

[0111] The process of switching the second lock body 12 and the first lock body 11 from the locked state to the unlocked state in the present application is as follows: first, the anti-loosening part disconnects the connection between the locking part 13 and the second lock body 12, so that the locking part 13 can move again, the locking part 13 rotates in the second rotation direction to drive the matching segment 1211 of the second locking part 121 to rotate by a certain angle, the second rotation direction is opposite to the first rotation direction, so that the second locking part 121 moves a certain distance in the axial direction away from the second lock body 12, at this time, the locking part 13 and the second locking part 121 are driven together to rotate in the second rotation direction, so that the matching protrusion 1213 of the second locking part 121 is rotated to the projection of the communication hole in the extension direction of the matching segment 1211, so that the matching protrusion 1213 of the second locking part 121 can pass out of the communication hole, realizing the separation of the second locking part 121 and the first lock body 11, and then the separation of the battery assembly 2 and the vehicle body is completed.

[0112] In one specific embodiment of the present application, during the locking process of the second lock body 12 and the first lock body 11, the locking part 13 and the second locking part 121 move a distance of 5mm in the axial direction towards the second lock body 12, so that the second locking part 121 can better cooperate with the second lock body 12 and the first lock body 11.

[0113] According to one embodiment of the present application, the anti-loosening part includes a support 141 and a connecting piece 142. The support 141 in the present application has a supporting and fixing effect on part of the components in the second lock body 12, the support 141 is arranged on the second lock body 12, and a first limiting part is formed on the support 141 to limit the connecting piece 142; the connecting piece 142 in the present application can be connected with the locking part 13 and the support 141 respectively, the connecting piece 142 is arranged on the locking part 13, and a second limiting part is formed on the connecting piece 142, which is suitable for cooperating with the first limiting part to jointly limit the rotation between the support 141 and the connecting piece 142, thereby limiting the rotation of the locking part 13 relative to the second lock body 12. By arranging the support 141 and the connecting piece 142, the first limiting part of the support 141 can cooperate with the second limiting part of the connecting piece 142 to limit the rotation between the support 141 and the connecting piece 142, so that when the second locking part 121 is tightly connected with the first lock body 11, the rotation of the locking part 13 relative to the second lock body 12 is limited, thereby increasing the locking strength of the locking device 1 and improving the connection reliability between the battery assembly 2 and the vehicle body, and the work of the battery assembly 2 during driving is safer.

[0114] According to one embodiment of the present application, the locking portion 13 is provided with a guide section, the connecting piece 142 is sleeved on the outer periphery of the guide section, the outer periphery of the guide section is provided with a first circumferential limiting portion 131, the connecting piece 142 is provided with a second circumferential limiting portion 1421 matched with the first circumferential limiting portion 131, and the first circumferential limiting portion 131 can be matched with the second circumferential limiting portion 1421 to limit the circumferential movement of the locking portion 13 and the guide section. Since the locking portion 13 is matched with the second locking portion 121 through threads, the circumferential movement of the locking portion 13 and the guide section is limited by matching the second circumferential limiting portion 1421 of the connecting piece 142 with the first circumferential limiting portion 131 of the guide section of the locking portion 13, so that the locking portion 13 cannot continue to drive the second locking portion 121 to rotate, thereby maintaining the locking state of the second lock body 12 and the first lock body 11 and ensuring the connection stability between the battery assembly 2 and the first lock body 11. In addition, the connecting piece 142 is sleeved on the outer periphery of the guide section in the present application, so that the connecting piece 142 can move along the outer periphery of the guide section in the axial direction of the locking portion 13, and the first limiting portion of the supporting piece 141 and the second limiting portion of the connecting piece 142 can be easily separated to release the rotation limitation of the locking portion 13 by the anti-loosening portion, thereby improving the unlocking efficiency of the locking device 1 and further saving the battery replacement time.

[0115] According to one embodiment of the present application, the first circumferential limiting portion 131 is configured as a spline formed on the outer periphery of the guide section and extending in the axial direction of the guide section, and the second circumferential limiting portion 1421 is configured as a spline groove provided on the connecting piece 142 and matched with the spline. Since the spline has large bearing capacity, uniform stress, small stress concentration, large spline connection strength and good guidance, the connection between the connecting piece 142 and the locking portion 13 is reliable and the stress on the contact surface is uniform by configuring the first circumferential limiting portion 131 as a spline and the second circumferential limiting portion 1421 as a spline groove, thereby further dispersing the stress of the locking portion 13 and the second locking portion 121, improving the bearing capacity of the locking device 1, prolonging the service life of the locking device 1 and saving the maintenance cost.

[0116] According to one embodiment of the present application, the locking device 1 further comprises an elastic member 15. The elastic member 15 is arranged between the locking portion 13 and the connecting piece 142, and the elastic member 15 is adapted to drive the connecting piece 142 to move towards the supporting piece 141. More specifically, when the second locking portion 121 is locked with the first lock body 11, the elastic member 15 has a rebounding tendency, the connecting piece 142 can be pushed to be in close contact with the supporting piece 141 under the elastic force of the elastic member 15, and the rotation between the supporting piece 141 and the connecting piece 142 is limited under the cooperation of the first limiting portion of the supporting piece 141 and the second limiting portion of the connecting piece 142, so as to further improve the locking strength of the anti-loosening portion to the locking device 1.

[0117] In one specific embodiment of the present application, the elastic member 15 is configured as a spring. The spring has strong elastic deformation capability and good recovery effect, so that the connecting member 142 and the supporting member 141 can be better limited and matched, and the anti-loosening effect of the anti-loosening part is better.

[0118] In another specific embodiment of the present application, the locking device 1 further comprises a spring stopper 16 arranged between the locking part 13 and the elastic member 15. The spring stopper 16 can increase the contact area between the locking part 13 and the elastic member 15, and improve the connection strength of the one end of the elastic member 15 away from the connecting member 142 and the locking part 13.

[0119] According to one embodiment of the present application, one of the first limiting part and the second limiting part is configured as a first limiting tooth, and the other is configured as a second limiting tooth. The connection between the supporting member 141 and the connecting member 142 is achieved through the meshing of the first limiting tooth and the second limiting tooth, which ensures that the supporting member 141 and the connecting member 142 cannot rotate relative to each other. Further, since the supporting member 141 and the connecting member 142 are arranged on the second lock body 12 and the locking part 13 respectively, it is ensured that the second lock body 12 and the locking part 13 cannot rotate relative to each other, so that the locking part 13 cannot rotate in the locked state to avoid the disengagement between the second locking part 121 and the first locking part, and the reliability of the locking device 1 is ensured.

[0120] According to one embodiment of the present application, the end of the supporting member 141 towards the connecting member 142 is formed with a first guide slope, and the end of the connecting member 142 towards the supporting member 141 is formed with a second guide slope. The first guide slope is formed with a first limiting part, and the second guide slope is formed with a second limiting part. The first guide slope and the second guide slope are arranged on the supporting member 141 and the connecting member 142 respectively. After the first guide slope and the second guide slope are matched, the coaxiality of the second lock body 12 and the locking part 13 can be ensured. When the second lock body 12 and the locking part 13 are not coaxial, the second lock body 12 and the locking part are made coaxial under the action of the first guide slope and the second guide slope, so that the further torque transmission is reliable.

[0121] The first limiting part and the second limiting part on the first guide slope and the second guide slope can be configured as tapered teeth. The meshing of the tapered teeth is stable and reliable, the locking strength is high, and a larger torque can be transmitted, so that the torque transmitted by the locking part 13 can be stably transmitted to the second lock body 12 during the locking of the battery assembly 2.

[0122] In an embodiment of the present application, the first guide slope is inclined towards the direction close to the connecting piece 142 in the direction radially away from the center of the support piece 141; and the second guide slope is inclined towards the direction away from the support piece 141 in the direction radially away from the center of the connecting piece 142. The first guide slope and the second guide slope can realize the positioning of the locking part 13 and the second lock body 12, improve the precision during the locking or unlocking process of the locking device 1, thereby reducing the wear of the parts and improving the service life of the locking device 1.

[0123] According to an embodiment of the present application, a flexible piece is arranged between the locking part 13 and the second locking part 121, which can be in interference fit with the locking part 13 and the second locking part 121 respectively. The deformation of the flexible piece causes the friction between the flexible piece and the locking part 13 and the second locking part 121. When the locking part 13 is driven to move by the external driving device, the movement of the second locking part 121 is further driven by the flexible piece. During the process of switching the locking device 1 from the unlocking state to the locking state, the locking part 13 is driven to rotate, and the second locking part 121 is synchronously moved until it is moved to cooperate with the first locking part under the conduction of the flexible piece. Further rotating the locking part 13, the relative movement between the locking part 13 and the second locking part 121 drives the second locking part 121 to pull the first lock body 11 and the second lock body 12 close to each other, thereby realizing the fastening between the first lock body 11 and the second lock body 12.

[0124] By arranging the flexible piece, the locking process of the locking device 1 is simplified, the design complexity of the driving part is reduced, the reliability of the locking device 1 is improved, and the working efficiency of the locking device 1 is improved.

[0125] According to an embodiment of the present application, a cooperating hole is formed in the locking part 13, a cooperating section 1211 is formed on the second locking part 121, and the flexible piece is arranged at least part of the outer periphery of the cooperating section 1211 and abuts against the inner wall of the cooperating hole and the outer peripheral wall of the cooperating section 1211 respectively. The flexible piece abuts against the outer peripheral wall of the cooperating section 1211 and the inner peripheral wall of the cooperating hole respectively. Through the friction between the flexible piece and the inner peripheral wall of the cooperating section 1211, the friction between the flexible piece and the inner peripheral wall of the cooperating hole transmits the torque between the second locking part 121 and the cooperating section 1211, thereby realizing the unlocking and locking process of the locking device 1.

[0126] In an embodiment of the present application, the flexible piece can be configured as a rubber ring, which has a long service life and good wear resistance, can greatly improve the service life of the locking device 1, and reduce the maintenance cost of the locking device 1.

[0127] As Figure 2 , Figure 3 , Figure 5 and Figure 8As shown, the application provides a locking device 1, the locking device 1 comprises a second lock body 12, the second lock body 12 is provided with a second locking part 121, the second locking part 121 is movably connected with the second lock body 12 and is used for locking with the first lock body 11, the locking device 1 further comprises a locking part 13 and an anti-loosening part, the locking part 13 is arranged on the second lock body 12 and cooperates with the second locking part 121, so as to drive the second locking part 121 to move towards the direction of locking with the first locking part, the anti-loosening part is suitable for connecting the second locking part 12 with the second lock body 121 in the locking state to avoid reverse rotation or loosening of the second locking part 121 in the locking state, improve the reliability of the locking device 1, and ensure the locking stability of the locking device 1. According to the locking device 1 of the application, by arranging the second lock body 12, the second locking part 121, the locking part 13 and the anti-loosening part, the locking efficiency and reliability of the locking device 1 are improved, the maintenance cost and difficulty of the locking device 1 are reduced, and the service life of the locking device is greatly improved.

[0128] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0129] In the description of the present application, "first feature" and "second feature" can include one or more features.

[0130] In the description of the present application, "a plurality of" means two or more.

[0131] In the description of the present application, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0132] In the description of the present application, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0133] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. Such terminology means that a particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of such terminology in various places in the specification does not necessarily refer to the same embodiment or example. Moreover, it is appreciated that the specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0134] Although embodiments of this application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A locking device for cooperating with a first lock body, the first lock body being provided with a first locking part, characterized in that, The locking device comprises: a second lock body provided with a second locking part, the second locking part being movably connected with the second lock body to switch between a locked state and an unlocked state; the second locking part is used to cooperate with the first locking part and lock the first lock body and the second lock body in the locked state, and is used to separate from the first locking part and unlock the first lock body and the second lock body in the unlocked state.

2. The locking device of claim 1, wherein Further comprising: a locking part provided on the second lock body, the locking part cooperating with the second locking part and being used to drive the second locking part to move in the direction of locking with the first locking part when the second lock body is in the locked state.

3. The locking device of claim 2, wherein Further comprising: an anti-loosening part provided on the second lock body, the anti-loosening part selectively connecting the locking part with the second lock body to limit the movement of the locking part relative to the second lock body.

4. The locking device according to any one of claims 1 to 3, characterized in that A supporting surface is formed on the first lock body, the supporting surface is provided with a locking protrusion or a locking groove, and the second locking part is used to abut against the locking protrusion or is embedded into the locking groove in the locked state.

5. The locking device of claim 4, wherein The second locking part comprises: a cooperating segment movably connected with the second lock body; a locking segment connected with the cooperating segment, the locking segment being provided with a cooperating protrusion, and the cooperating protrusion being used to abut against the locking protrusion or being embedded into the locking groove in the locked state of the second locking part.

6. The locking device of claim 5, wherein The cooperating segment is rotatably connected with the second lock body.

7. The locking device of claim 6, wherein The cooperating segment is switched to the locked state after rotating an angle α relative to the second lock body in the unlocked state, and α satisfies: 0° < α < 180°.

8. Locking device according to claim 6 or 7, characterized in that A first rotation limiting part is formed on the second lock body, a second rotation limiting part is formed on the cooperating segment and cooperates with the first rotation limiting part, and the first rotation limiting part cooperates with the second rotation limiting part to limit the rotation angle of the cooperating segment.

9. The locking device of claim 8, wherein The first rotation limiting part is configured as an arc-shaped limiting groove extending around the cooperating segment, and the second rotation limiting part is configured as a limiting protrusion provided on the outer circumferential surface of the cooperating segment, and the limiting protrusion is accommodated in the arc-shaped limiting groove.

10. The locking device according to any one of claims 5-9, characterized in that The cooperating protrusion is configured as a plurality of cooperating protrusions; the locking protrusion is configured as a plurality of locking protrusions, the plurality of cooperating protrusions are used to cooperate with the plurality of locking protrusions one by one, or the locking groove is configured as a plurality of locking grooves, and the plurality of cooperating protrusions are used to cooperate with the plurality of locking grooves one by one.

11. The locking device of claim 10, wherein A communication hole is formed on the supporting surface, in the unlocked state, the cooperating protrusion is configured to coincide with the projection of the communication hole in the extending direction of the cooperating segment, in the locked state, the cooperating protrusion is configured to at least partially coincide with the projection of the supporting surface in the extending direction of the cooperating segment.

12. The locking device of claim 3, wherein A cooperating hole is formed in the locking part, at least part of the second locking part is arranged in the cooperating hole, a first thread is arranged on the inner circumferential wall of the cooperating hole, and at least part of the outer circumferential wall of the second locking part is provided with a second thread cooperating with the first thread.

13. The locking device of claim 12, wherein, The anti-loosening part comprises: A support member is arranged on the second lock body, and a first limiting portion is formed on the support member; A connecting member is arranged on the locking portion, and a second limiting portion adapted to cooperate with the first limiting portion is formed on the connecting member. The first limiting portion and the second limiting portion cooperate to limit the rotation between the support member and the connecting member.

14. The locking device of claim 13, wherein A guide segment is formed on the locking portion, and the connecting member is sleeved on the outer periphery of the guide segment. A first circumferential limiting portion is arranged on the outer periphery of the guide segment, and a second circumferential limiting portion adapted to cooperate with the first circumferential limiting portion is formed on the connecting member. The first circumferential limiting portion and the second circumferential limiting portion cooperate to limit the circumferential movement of the locking portion and the guide segment.

15. The locking device of claim 14, wherein, The first circumferential limiting portion is configured as a spline formed on the outer periphery of the guide segment and extending axially along the guide segment, and the second circumferential limiting portion is configured as a spline groove arranged on the connecting member and adapted to cooperate with the spline.

16. Locking device according to claim 14 or 15, characterized in that Further comprising: An elastic member is arranged between the locking portion and the connecting member and is adapted to drive the connecting member to move towards the support member.

17. The locking device according to any one of claims 13-15, characterized in that The first limiting portion and the second limiting portion are respectively configured as a first limiting tooth and a second limiting tooth.

18. The locking device according to any one of claims 13-15, characterized in that An end of the support member towards the connecting member is formed with a first guide inclined surface, and an end of the connecting member towards the support member is formed with a second guide inclined surface. The first limiting portion is formed on the first guide inclined surface, and the second limiting portion is formed on the second guide inclined surface.

19. The locking device of claim 18, wherein, The first guide inclined surface is inclined towards the connecting member in a direction radially away from the center of the support member; The second guide inclined surface is inclined away from the support member in a direction radially away from the center of the connecting member.

20. The locking device of any one of claims 2, 3, 12-15, wherein, A flexible member is arranged between the locking portion and the second locking portion.

21. The locking apparatus of claim 20, wherein, A cooperating hole is formed in the locking portion, and a cooperating segment is formed on the second locking portion. The flexible member is arranged on at least part of the outer periphery of the cooperating segment and abuts against the inner wall of the cooperating hole and the outer peripheral wall of the cooperating segment, respectively.

22. The locking device of claim 21, wherein, The flexible member is configured as a rubber ring.

23. A battery assembly characterized by, A battery body and a locking device as claimed in any one of claims 1-22 are included, and the locking device is connected to the battery body.

24. An electrical device, comprising: The electric device includes a first lock body and a battery assembly as claimed in claim 23, wherein the first lock body and the locking device are cooperatively connected to detachably connect the battery body to the electric device.

25. A locking mechanism, characterized by Comprising: A first lock body and a locking device that can be cooperatively connected, and the locking device is configured as the locking device as claimed in any one of claims 1-24.

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