Electric vehicle battery pack locking device and electric vehicle

Abstract

The present invention provides an electric vehicle battery pack locking device and an electric vehicle. The electric vehicle battery pack locking device includes a locking mechanism disposed on the body of the electric vehicle and a connecting component disposed on the battery pack. The locking mechanism includes: a housing fixedly disposed on the body; a crank drive assembly disposed in the housing, including at least a pair of crank link components, each crank link component including at least two links connected end to end; a slider rotatably connected to the other end of each crank link component; a clamping component including at least a pair of clamping members disposed on the corresponding crank link component. When the battery pack moves towards the body, the other end of the connecting component abuts against the slider, and the slider is pushed to drive the part of each crank link component where the clamping member is disposed to approach each other until the clamping component clamps the clamped portion. The provided electric vehicle battery pack locking device makes the battery pack replacement process simple and fast, with high replacement efficiency and reliable locking safety.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive battery packs, and particularly to a locking device for an electric vehicle battery pack and an electric vehicle including the device. Background Art

[0002] At present, with the continuous progress of new energy vehicle technology, new energy vehicles are being applied more and more widely, the sales volume of new energy vehicles globally is getting better and better, and the demand of ordinary people for new energy vehicles is also increasing. However, due to the limited battery range, pure electric vehicle drivers have range anxiety. To solve the problem of the driving range of electric vehicles, charging piles for electric vehicles have been springing up in various corners of cities, gas stations on highways, and other areas. However, since the charging time of electric vehicles is relatively long (generally at least 30 minutes for fast charging), drivers generally have to wait for some time before they can use the vehicle, which is not very beneficial for taxi and online car-hailing drivers. Therefore, the market demand for rapid battery swapping technology is extremely urgent. At the same time, the state is also encouraging the development of rapid battery swapping technology in various regions.

[0003] The rapid battery swapping technology for electric vehicle battery packs has many advantages compared with charging at charging piles: (1) If fast charging is used for charging electric vehicles (slow charging takes too long and is generally suitable for home use), it generally takes about 30 minutes to charge to 80%, while the battery swapping technology can be controlled within a few minutes, and the difference between the two is relatively large. (2) The rapid battery swapping technology is beneficial to improving the service life of the battery pack. The service life of the battery pack is generally about 8 years. If fast charging (for taxis and online car-hailing vehicles) is used for a long time for charging, this will accelerate the attenuation of the battery pack's battery cells and is also very unfavorable for the safety of the battery pack. The rapid battery swapping technology generally uses slow charging, which is very friendly to the attenuation and safety of the battery cells and is more beneficial to the service life of the battery pack. (3) The rapid battery swapping technology will reduce the load on the power grid. Considering the power consumption load and the difference in electricity prices between peak and valley periods, the battery swapping station can consider slow charging the standby battery pack during the valley period of electricity consumption. The usage scenario of the charging pile is generally fast charging. In comparison, the rapid battery swapping technology can not only reduce the load on the power grid but also reduce the electricity cost. (4) The rapid battery swapping technology can explore the vehicle-battery separation model. Currently, the unit price of the battery pack accounts for 40% - 50% of the total price of the battery pack. If the price of the electric vehicle does not include the battery pack when consumers purchase a vehicle and the battery pack belongs to the parts manufacturer, the unit price of the electric vehicle will be greatly reduced, basically equivalent to or even competitive with the price of traditional fuel vehicles. Compared with the fuel cost, the electricity cost has an obvious advantage, and the enthusiasm of consumers to purchase electric vehicles will be greatly improved, which is conducive to the sales and promotion of new energy electric vehicles.

[0004] In the existing technology, the battery pack is generally fixed to the vehicle body floor by high-strength bolts or other mechanical clamping methods. If the battery pack needs to be disassembled and assembled, these bolts need to be disassembled and assembled, which is very time-consuming and laborious. For a battery pack with more bolts installed, it will be more cumbersome; at the same time, repeated disassembly and assembly is also not conducive to the service life of the parts. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the disassembly and assembly of the battery pack in the existing fast battery swapping technology for electric vehicles is inconvenient and affects the service life of the parts. A locking device for an electric vehicle battery pack is provided, which uses a crank connecting rod structure to connect the battery pack, making the battery pack replacement process simple, fast, with high replacement efficiency, and the locking is safe and reliable.

[0006] To solve the above technical problems, the present invention provides a locking mechanism disposed on the vehicle body of an electric vehicle and a connecting component disposed on the battery pack; wherein the locking mechanism includes: a housing fixedly disposed on the vehicle body; a crank drive assembly disposed in the housing, including at least a pair of crank connecting rod components, each crank connecting rod component including at least two connecting rods connected end to end, and one end of each crank connecting rod component being rotatably connected to the housing; a slider received in the housing and rotatably connected to the other end of each crank connecting rod component; a clamping component including at least a pair of clamping members, and each clamping member being disposed on the corresponding crank connecting rod component.

[0007] One end of the connecting component is fixed to the battery pack, and the other end protrudes toward the locking mechanism and is provided with a clamped portion adapted to the clamping component; wherein when the battery pack moves toward the vehicle body, the other end of the connecting component abuts against the slider and pushes the slider to drive the parts of each crank connecting rod component provided with the clamping members to approach each other until the clamping component clamps the clamped portion.

[0008] Adopting the above solution, the locking device for the electric vehicle battery pack uses a crank connecting rod structure to clamp and connect the battery pack. When locking, it only needs the battery pack to move toward the vehicle body to make the connecting component on it move into the locking mechanism and push the slider. The battery pack replacement process is simple and fast, with high replacement efficiency, and the locking is safe and reliable.

[0009] According to another specific embodiment of the present invention, in the locking device for the electric vehicle battery pack disclosed in the embodiment of the present invention, the crank drive assembly includes a pair of crank connecting rod components symmetrically disposed on both sides of the slider, and each crank connecting rod component includes a first connecting rod and a second connecting rod; the clamping component includes a pair of clamping claws, and the pair of clamping claws close to form a hollow cylindrical clamping component; the connecting component is rod-shaped, and the clamped portion is an annular recess disposed on the outer periphery of the connecting component.

[0010] One end of the first connecting rod is rotatably arranged on the housing; one end of the second connecting rod is rotatably connected to the other end of the first connecting rod, and the other end of the second connecting rod is rotatably arranged on the slider; each clamping jaw is arranged at one end of the second connecting rod; wherein as the battery pack moves towards the vehicle body, the other end of the connecting component abuts against the slider and pushes the slider to move along the extending direction of the connecting component, and a pair of clamping jaws approach each other and close to sleeved on the connected part.

[0011] With the above solution, a pair of crank connecting rod components are provided, and the crank connecting rod components include two connecting rods, making the structure of the crank transmission assembly simple; and the structures of the clamping component and the clamped part are simple and the connection is stable.

[0012] According to another specific embodiment of the present invention, for the electric vehicle battery pack locking device disclosed in the embodiment of the present invention, when a pair of clamping jaws are closed and sleeved on the connected part, both the first connecting rod and the second connecting rod are in a locked state extending along the extending direction of the connecting component.

[0013] With the above solution, it is ensured that the battery pack is in a reliable fixed connection.

[0014] According to another specific embodiment of the present invention, the electric vehicle battery pack locking device disclosed in the embodiment of the present invention further includes an unlocking component; wherein the unlocking component is connected to the clamping component and can drive the clamping component to release the clamping of the clamped part.

[0015] With the above solution, the setting of the unlocking component facilitates the unlocking operation and facilitates the release and replacement of the battery pack.

[0016] According to another specific embodiment of the present invention, for the electric vehicle battery pack locking device disclosed in the embodiment of the present invention, the unlocking component includes a pair of unlocking pins respectively fixedly arranged on each clamping jaw, and a pair of unlocking rods; wherein one end of each unlocking rod is respectively rotatably connected to an unlocking pin.

[0017] With the above solution, it is convenient to rotate the unlocking pin by the unlocking rod to drive the clamping jaw to release the clamping of the clamped part, so as to facilitate the operation.

[0018] According to another specific embodiment of the present invention, for the electric vehicle battery pack locking device disclosed in the embodiment of the present invention, the unlocking component includes a pair of unlocking pins respectively fixedly arranged on each second connecting rod, and a pair of unlocking rods; wherein one end of each unlocking rod is respectively rotatably connected to an unlocking pin.

[0019] With the above solution, it is convenient to rotate the unlocking pin by the unlocking rod to drive the second connecting rod to rotate so that the clamping jaw releases the clamping of the clamped part, so as to facilitate the setting and operation.

[0020] According to another specific embodiment of the present invention, for the electric vehicle battery pack locking device disclosed in the embodiment of the present invention, a travel groove is provided on the housing, and the end of the unlocking pin passes through the travel groove and extends out of the housing, and can move along the travel groove.

[0021] With the above solution, the movement of the unlocking pin is guided by the travel groove and the angle at which the clamping claw is released is limited, which is convenient for operation.

[0022] According to another specific embodiment of the present invention, for the electric vehicle battery pack locking device disclosed in the embodiment of the present invention, it further includes a guiding member housed in the housing; wherein the guiding member guides the slider to move along the extending direction of the connecting member.

[0023] With the above solution, the setting of the guiding member facilitates the sliding operation of the slider.

[0024] According to another specific embodiment of the present invention, for the electric vehicle battery pack locking device disclosed in the embodiment of the present invention, the guiding member is a sleeve sleeved on the outer periphery of the slider, and the sleeve is fixedly arranged in the housing; and a spiral spring is arranged between the slider and the end of the housing inside the sleeve.

[0025] The present invention also provides an electric vehicle, including a vehicle body and a battery pack detachably connected to the vehicle body; characterized in that the battery pack is connected to the vehicle body through the electric vehicle battery pack locking device provided by the present invention.

[0026] With the above solution, by using the electric vehicle battery pack locking device provided by the present invention to connect the battery pack on the vehicle, the battery pack replacement process is simple and fast, the replacement efficiency is high, and the locking is safe and reliable.

[0027] According to another specific embodiment of the present invention, for the electric vehicle disclosed in the embodiment of the present invention, a plurality of electric vehicle battery pack locking devices are evenly spaced along the outer periphery of the battery pack; and among a pair of unlocking rods of at least two adjacent electric vehicle battery pack locking devices in the same direction, the unlocking rods that can move in the same direction are connected together by a toggle rod.

[0028] With the above solution, the connecting rod connects the unlocking rods and unlocking pins on the same side in the electric vehicle battery pack locking device, so that when unlocking is required, only the toggle rod on each side needs to be pushed.

[0029] According to another specific embodiment of the present invention, for the electric vehicle disclosed in the embodiment of the present invention, along the vehicle length direction of the electric vehicle, at least 1 pair of electric vehicle battery pack locking devices are evenly spaced on one side of the outer periphery of the battery pack.

[0030] With the above solution, the connection between the battery pack and the electric vehicle is stable.

[0031] The beneficial effects of the present invention are as follows:

[0032] The electric vehicle battery pack locking device provided by the present invention uses a crank - connecting rod structure to clamp and connect the battery pack, making the battery pack replacement process on the electric vehicle simple, fast, with high replacement efficiency, and the locking is safe and reliable. Brief Description of the Drawings

[0033] Figure 1 It is a structural diagram of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0034] Figure 2 It is an exploded view of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0035] Figure 3 It is a structural diagram of the crank drive assembly and connecting components of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0036] Figure 4 It is a structural diagram of the connecting components of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0037] Figure 5 It is a structural diagram of the first connecting rod of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0038] Figure 6 It is a structural diagram of the slider of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0039] Figure 7 It is a structural diagram of the second connecting rod and clamping components of the electric vehicle battery pack locking device in Embodiment 1 of the present invention;

[0040] Figure 8 It is a structural diagram of the electric vehicle battery pack locking device and the lever in Embodiment 2 of the present invention;

[0041] Figure 9 It is a structural diagram of the connection between the lever and the unlocking rod in Embodiment 2 of the present invention.

[0042] Explanation of Reference Numerals:

[0043] 100: Electric vehicle battery pack locking device;

[0044] 110: Locking mechanism;

[0045] 111: Housing; 1111: Upper housing; 1112: Lower housing; 1113: Travel groove; 1114: Mounting bolt;

[0046] 112: Crank drive assembly; 1121: Crank connecting rod component; 11211: First connecting rod; 11212: Second connecting rod; 1122: Slide block; 11221: Connecting ear; 1123: Clamping component; 11231: Clamping jaw;

[0047] 113: Fixed pin shaft;

[0048] 114: Sleeve;

[0049] 115: Helical spring;

[0050] 120: Connecting component; 121: Clamped part;

[0051] 130: Unlocking component; 131: Unlocking pin; 132: Unlocking rod;

[0052] 200: Battery pack housing;

[0053] 300: Lever. Detailed implementation manners

[0054] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0055] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0056] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0057] The terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0058] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0059] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0060] Embodiment 1

[0061] The present invention provides an electric vehicle battery pack locking device, as Figures 1 - 3 shown, which includes a locking mechanism 110 disposed on the body of the electric vehicle and a connecting component 120 disposed on the battery pack; wherein the locking mechanism 110 includes: a housing 111, the housing 111 is fixedly disposed on the vehicle body; a crank drive assembly 112, the crank drive assembly 112 is disposed in the housing 111 and includes at least a pair of crank-link members 1121, each crank-link member 1121 includes at least two links connected end to end with each other, and one end of each crank-link member 1121 is rotatably connected to the housing 111; a slider 1122, the slider 1122 is received in the housing 111 and is rotatably connected to the other end of each crank-link member 1121; a clamping portion 1123 member, the clamping portion 1123 member includes at least a pair of clamping members, and each clamping member is disposed on the corresponding crank-link member 1121.

[0062] And one end of the connecting component 120 is fixed to the battery pack, specifically on the battery pack housing, the other end protrudes towards the locking mechanism 110, and is provided with a clamped portion 121 adapted to the clamping member 1123; wherein when the battery pack moves towards the vehicle body, it drives the other end of the connecting component 120 to abut against the slider 1122, and pushes the slider 1122 to drive the part of each crank-link member 1121 where the clamping member is disposed to approach each other until the clamping member 1123 clamps the clamped portion 121.

[0063] Specifically, the housing 111 can be fixed to the vehicle body by welding, riveting, screwing, bonding, etc. The housing 111 can be arranged to include two parts for facilitating the assembly of the locking mechanism 110, specifically as Figures 1 - 2As shown, it may include an upper shell 1111 and a lower shell 1112, and the upper shell 1111 and the lower shell 1112 can be connected by means such as welding, riveting, screwing, etc.; more specifically, mounting bolts 1114 can also be provided, and connection holes for the mounting bolts 1114 to pass through are provided at corresponding positions of the upper shell 1111 and the lower shell 1112. The upper shell 1111 and the lower shell 1112 are connected by the mounting bolts 1114, and further the housing 111 is fixedly connected to the vehicle body.

[0064] As Figures 1 - 2 shown, one end of the crank connecting rod member 1121 in the crank drive assembly 112 can be rotatably connected to the housing 111 through a fixed pin shaft 113, that is, one end of the fixed pin shaft 113 is fixed to the housing 111, and the other end is rotatably connected to one end of the crank connecting rod member 1121, so that the connecting rod connecting the crank connecting rod member 1121 and the fixed pin shaft 113 can rotate around the fixed pin shaft 113; the crank connecting rod member 1121 can also be connected to the housing 111 in other ways, as long as it can be realized that the connecting rod connecting the crank connecting rod member 1121 and the fixed pin shaft 113 can rotate around the fixed pin shaft 113.

[0065] The slider 1122 is rotatably connected to the other end of each crank connecting rod member 1121. Specifically, it can be connected through a rotating shaft, or it can be other ways, as long as it can be realized that the connecting rod connecting the crank connecting rod member 1121 and the slider 1122 can rotate around the slider 1122. The slider 1122 can slide within the housing 111. Specifically, a structure for guiding the sliding of the slider 1122, such as a guide rail, can be provided within the housing 111. As the slider 1122 slides, the part of the crank connecting rod member 1121 provided with the clamping member is driven to approach each other. The position where the clamping member is provided on the crank connecting rod member 1121 should be a position where it can be realized that when the slider 1122 slides, the clamping members can be driven to approach each other. For example, it is provided at a position on the crank connecting rod member 1121 far from the slider 1122.

[0066] One end of the connecting member 120 and the battery pack can be fixedly connected by means such as welding, bonding, riveting, etc. The clamping member can specifically be claw-shaped, convex tooth-shaped, etc., and the clamped portion 121 of the clamping member 1123 is a matching annular recess structure, groove, etc., as long as it can be realized that the clamping member 1123 and the clamped portion 121 cooperate to clamp the connecting member 120.

[0067] The crank drive assembly 112 includes at least a pair of crank-link components 1121, specifically it can be a pair, or two pairs, three pairs, etc.; each crank-link component 1121 includes at least two connecting rods connected end to end with each other, specifically it can also include two or more than two sequentially connected connecting rods, as long as it can make the part of the slider 1122 driving each crank-link component 1121 to set the clamping members approach each other until the clamping member 1123 clamps the clamped portion 121, for example as Figure 3 shown, the crank drive assembly 112 includes a pair of crank-link components 1121, and each crank-link component 1121 includes at least two connecting rods connected end to end with each other.

[0068] It should be noted that after the clamping member 1123 clamps the clamped portion 121, it should be locked to limit the movement of the clamping member 1123; it can be achieved by setting all the connecting rods on the crank-link component 1121 to be in a locked state extending along the extension direction of the connecting component 120, or by setting a locking structure, specifically such as setting a rotational locking structure for the connecting rods on the crank-link component 1121 to achieve locking.

[0069] Adopting the above solution, the electric vehicle battery pack locking device uses the crank-link structure to clamp the battery pack. When locking, only the battery pack needs to move towards the vehicle body to make the connecting component 120 on it move into the locking mechanism 110 and push the slider 1122. The battery pack replacement process is simple and fast, with high replacement efficiency and reliable locking.

[0070] According to another specific embodiment of the present invention, as Figure 3 shown, the crank drive assembly 112 includes a pair of crank-link components 1121 symmetrically arranged on both sides of the slider 1122, and each crank-link component 1121 includes a first connecting rod 11211 and a second connecting rod 11212; the clamping member 1123 includes a pair of clamping claws 11231, and a pair of clamping claws 11231 are closed to form a hollow cylindrical clamping member 1123; as Figure 3 and Figure 4 shown, the connecting component 120 is rod-shaped, and the clamped portion 121 is an annular recess provided on the outer periphery of the connecting component 120.

[0071] As Figures 1 - 3 shown, one end of the first connecting rod 11211 is rotatably arranged on the housing 111, specifically it can be connected through a fixed pin shaft 113, and the structure of the first connecting rod can be specifically as Figure 5 shown; one end of the second connecting rod 11212 is rotatably connected to the other end of the first connecting rod 11211, specifically it can be connected through a rotating shaft, and the other end of the second connecting rod 11212 is rotatably arranged on the slider 1122, specifically, as Figure 3 and Figure 6As shown, the slider 1122 can be provided with a connecting ear 11221 and is rotatably connected to the second connecting rod 11212 by a rotating shaft; as Figure 3 and Figure 7 shown, each clamping jaw 11231 is arranged at one end of the second connecting rod 11212 and is arranged oppositely, and the clamping jaw 11231 and the second connecting rod 11212 can be an integral structure. As the battery pack moves towards the vehicle body, the other end of the connecting member 120 abuts against the slider 1122 and pushes the slider 1122 to move along the extending direction of the connecting member 120, and a pair of clamping jaws 11231 approach each other and close to sleeved on the connected part.

[0072] Adopting the above scheme, the crank connecting rod components 1121 are arranged in a pair, and the crank connecting rod components 1121 include two connecting rods, making the structure of the crank drive assembly 112 simple; and the structures of the clamping component 1123 and the clamped part 121 are simple and the connection is stable.

[0073] According to another specific embodiment of the present invention, when a pair of clamping jaws 11231 are closed and sleeved on the connected part, both the first connecting rod 11211 and the second connecting rod 11212 are in a locked state extending along the extending direction of the connecting member 120.

[0074] Specifically, when the clamping jaws 11231 are completely closed and sleeved on the connected part to clamp the connecting member 120, the first connecting rod 11211 and the second connecting rod 11212 form a straight line and both extend along the extending direction of the connecting member 120. At this time, the crank drive assembly 112 is in a "dead point" state, and the whole mechanism is self-locked and in a locked state, so as to ensure that the battery pack is in a reliable fixed connection.

[0075] According to another specific embodiment of the present invention, it further includes an unlocking component 130; wherein the unlocking component 130 is connected to the clamping part 1123 and can drive the clamping part 1123 to loosen the clamping of the clamped part 121.

[0076] Specifically, the unlocking component 130 can be an unlocking pin or rod that passes through one end of the housing 111 to the outside of the housing 111 and is connected to the clamping part 1123 at the other end. By pushing the clamping jaw 11231 to rotate outwards, a pair of clamping jaws 11231 are separated, and the crank drive assembly 112 disengages from the "dead point" position. When it is opened to a certain angle, the clamping jaw 11231 loosens the clamping of the clamping part 1123, and the connecting member 120 can automatically fall, and the battery pack is in an unlocked state and can be disassembled.

[0077] Among them, the unlocking component 130 can be arranged to pull the clamping jaw 11231 in the direction of the outward rotation of the second connecting rod 11212, or can be arranged perpendicular to the direction of the outward rotation of the second connecting rod 11212. By rotating the unlocking rod 132, the clamping jaw 11231 is driven to rotate outward, as long as it can drive the clamping part 1123 to release the clamping of the clamped part 121.

[0078] Adopting the above solution, arranging the unlocking component 130 facilitates the unlocking operation and facilitates the release and replacement of the battery pack.

[0079] According to another specific embodiment of the present invention, the unlocking component 130 includes a pair of unlocking pins respectively fixedly arranged on each clamping jaw 11231, and a pair of unlocking rods; one end of each unlocking rod is respectively connected to an unlocking pin.

[0080] Specifically, one end of the unlocking pin is connected to the corresponding clamping jaw 11231, and the other end can be arranged outside the housing 111. The unlocking rod is connected to the end outside the housing 111, and the unlocking rod and the unlocking pin can be rotatably connected through a rotating shaft. Adopting the above solution, it is convenient to drive the clamping jaw 11231 to release the clamping of the clamped part 121 by rotating the unlocking pin through the unlocking rod, which is convenient for operation.

[0081] According to another specific embodiment of the present invention, as Figures 2 - 3 shown, the unlocking component 130 includes a pair of unlocking pins 131 respectively fixedly arranged on each second connecting rod 11212, and a pair of unlocking rods (not shown in the attached figure); one end of each unlocking rod is respectively rotatably connected to an unlocking pin 131.

[0082] Specifically, since the clamping jaw 11231 is arranged on the second connecting rod 11212, the unlocking pin 131 can be directly arranged on the second connecting rod 11212, and the clamping jaw 11231 is driven to separate by driving the rotation of the second connecting rod 11212, so as to release the clamping of the clamping component 1123. More specifically, as Figure 2 and Figure 3 shown, one end of the unlocking pin 131 is connected to the corresponding second connecting rod 11212, and the other end can be arranged outside the housing 111. The unlocking rod is connected to the end outside the housing 111. The position where the unlocking pin 131 is connected to the corresponding second connecting rod 11212 only needs to be able to realize that its rotation can drive the second connecting rod 11212 to drive the clamping jaw 11231 to separate.

[0083] Adopting the above solution, it is convenient to drive the second connecting rod 11212 to rotate by rotating the unlocking pin 131 through the unlocking rod, so that the clamping jaw 11231 releases the clamping of the clamped part 121, which is convenient for setting and operation.

[0084] According to another specific embodiment of the present invention, asFigure 1 and Figure 2 As shown in Figure 2 , a travel groove 1113 is provided on the housing 111. The end of the unlocking pin 131 passes through the travel groove 1113 and extends out of the housing 111, and can move along the travel groove 1113.

[0085] With the above solution, the movement of the unlocking pin 131 is guided by the travel groove 1113 and the angle at which the clamping jaw 11231 is released is limited, which is convenient for operation.

[0086] According to another specific embodiment of the present invention, it further includes a guiding member received in the housing 111; wherein the guiding member guides the slider 1122 to move along the extending direction of the connecting member 120.

[0087] Specifically, the guiding member is fixedly provided in the housing 111, and can be structures such as a chute, a slide rail, a sleeve, etc. that match the slider 1122. The shape of the slider 1122 matches the guiding member, and it can be entirely or partially disposed in the chute and slide along the chute, or sleeved outside the slide rail, or disposed in the sleeve 114; so that the slider 1122 slides along the guiding member.

[0088] With the above solution, the setting of the guiding member facilitates the sliding operation of the slider 1122.

[0089] According to another specific embodiment of the present invention, as Figures 2 - 3 shown, wherein the guiding member is a sleeve 114 sleeved on the outer periphery of the slider 1122, and the sleeve 114 is fixedly provided in the housing 111; and a helical spring 115 is provided between the slider 1122 and the end of the housing 111 inside the sleeve 114.

[0090] Specifically, as Figure 6 shown, the part of the slider 1122 that slides in the sleeve 114 is set to be cylindrical, and is connected to the sleeve 114 through the helical spring 115 and slides inside the sleeve 114.

[0091] Embodiment 2

[0092] The present invention also provides an electric vehicle, including a vehicle body and a battery pack detachably connected to the vehicle body; the battery pack is connected to the vehicle body through the electric vehicle battery pack locking device 100 provided in Embodiment 1.

[0093] Specifically, the electric vehicle battery pack locking device 100 is detachably connected to the battery pack through the connecting member 120. Specifically, as Figure 8 shown, one end of the connecting member 120 is fixed to the battery pack housing 200, and the other end is detachably connected to the locking mechanism 110 of the electric vehicle battery pack locking device 100. The housing 111 of the locking mechanism 110 can be fixed to the vehicle body by welding, riveting, screwing, bonding, etc., as Figure 8As shown, the housing 111 is connected to the vehicle body by mounting bolts 1114.

[0094] Furthermore, in the electric vehicle battery pack locking device 100, the unlocking member 130 includes a pair of unlocking pins 131 respectively and fixedly arranged on each clamping jaw 11231 or each second link 11212, and a pair of unlocking levers 132; one end of each unlocking lever 132 is respectively rotatably connected to an unlocking pin 131.

[0095] Adopting the above solution, when the electric vehicle battery pack locking device 100 provided by the present invention is used to connect the battery pack on an automobile, the battery pack replacement process is simple and fast, the replacement efficiency is high, and the locking is safe and reliable.

[0096] According to another specific embodiment of the present invention, as Figures 8 - 9 shown, a plurality of electric vehicle battery pack locking devices 100 are evenly arranged at intervals along the outer periphery of the battery pack; and among a pair of unlocking levers 132 of at least two adjacent electric vehicle battery pack locking devices 100 in the same direction, the unlocking levers 132 that can move in the same direction are connected together by a lever 300.

[0097] Specifically, as Figure 8 shown, two sets of levers 300 are arranged on the same side of all electric vehicle battery pack locking devices 100, and the levers 300 are respectively pushed in opposite directions. When the crank drive assembly 112 in the electric vehicle battery pack locking device 100 is in the "dead point" position, by pushing the lever 300, all the unlocking levers 132 thereon are driven to move, so that the corresponding clamping jaws 11231 open and the connecting member 120 falls off. At this time, each electric vehicle battery pack locking device 100 is in the unlocked state.

[0098] Adopting the above solution, the link connects the unlocking levers 132 and unlocking pins 131 on the same side in the electric vehicle battery pack locking device 100 together, so that when unlocking is required, only the levers 300 on each side need to be pushed.

[0099] According to another specific embodiment of the present invention, along the vehicle length direction of the electric vehicle, at least one pair of electric vehicle battery pack locking devices 100 are evenly arranged at intervals on the outer periphery of one side of the battery pack.

[0100] Adopting the above solution makes the connection between the battery pack and the electric vehicle stable.

[0101] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in connection with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electric vehicle battery pack locking device, characterized in that, It includes a locking mechanism provided on the body of an electric vehicle and a connecting component provided on the battery pack; Wherein The locking mechanism includes: A housing, which is fixedly provided on the vehicle body; A crank drive assembly, which is provided in the housing; A slider, which is received in the housing; wherein, The crank drive assembly includes a pair of crank-link components symmetrically arranged on both sides of the slider, and each crank-link component includes a first link and a second link; One end of the first link is rotatably provided on the housing; One end of the second link is rotatably connected to the other end of the first link, and the other end of the second link is rotatably provided on the slider; A clamping component, which includes a pair of clamping claws, and each clamping claw is provided at the one end of the second link; the pair of clamping claws close to form a hollow cylindrical clamping component; An unlocking component, which includes an unlocking pin, one end of the unlocking pin passes through the housing and faces outside the housing, and the other end is connected to the clamping component; and One end of the connecting component is fixed on the battery pack, and the other end protrudes towards the locking mechanism. The connecting component is rod-shaped and is provided with a clamped portion adapted to the clamping component, and the clamped portion is an annular recess provided on the outer circumference of the connecting component; wherein As the battery pack moves towards the vehicle body, it drives the other end of the connecting component to abut against the slider, and pushes the slider to move along the extending direction of the connecting component, driving the pair of clamping claws to approach each other and close to sleeved on the clamped portion; when the pair of clamping claws close to sleeve on the clamped portion, both the first link and the second link are in a locked state extending along the extending direction of the connecting component; And, the unlocking component can drive the clamping component to release the clamping of the clamped portion.

2. The electric vehicle battery pack locking device according to claim 1, characterized in that, The unlocking component includes a pair of the unlocking pins respectively fixedly provided on each clamping claw, and a pair of unlocking rods; Wherein One end of each unlocking rod is respectively rotatably connected to one unlocking pin.

3. The electric vehicle battery pack locking device according to claim 2, wherein, The unlocking component includes a pair of unlocking pins respectively fixedly provided on each second link, and a pair of unlocking rods; Wherein One end of each unlocking rod is respectively rotatably connected to one unlocking pin.

4. The electric vehicle battery pack locking device according to claim 2 or 3, characterized in that A travel groove is provided on the housing, and the end of the unlocking pin passes through the travel groove and extends out of the housing, and can move along the travel groove.

5. The electric vehicle battery pack locking device according to claim 4, characterized in that, It further includes a guiding member received in the housing; wherein The guiding member guides the slider to move along the extending direction of the connecting component.

6. The electric vehicle battery pack locking device according to claim 5, characterized in that, Wherein The guiding member is a sleeve sleeved on the outer circumference of the slider, and the sleeve is fixedly provided in the housing; and a helical spring is provided between the slider and the end of the housing inside the sleeve.

7. An electric vehicle, comprising a vehicle body and a battery pack detachably connected to the vehicle body; characterized in that, The battery pack is connected to the vehicle body through the electric vehicle battery pack locking device according to any one of claims 2-6.

8. The electric vehicle according to claim 7, wherein, Wherein A plurality of the electric vehicle battery pack locking devices are evenly arranged at intervals along the outer circumference of the battery pack; and Among a pair of unlocking levers of at least two adjacent electric vehicle battery pack locking devices in the same direction, the unlocking levers that can move in the same direction are connected together by a shifting lever.

9. The electric vehicle according to claim 8, wherein, Wherein Along the longitudinal direction of the electric vehicle, at least one pair of the electric vehicle battery pack locking devices are evenly spaced on the outer periphery of one side of the battery pack.

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