Electric automobile

Abstract

The invention discloses an electric automobile which comprises two automobile body girders arranged in the width direction of the automobile in a spaced mode, and the two automobile body girders extend in the length direction of the automobile. The plurality of locking structures are connected to the vehicle body girder; and the quick-change battery pack is provided with a plurality of lock connecting structures, and the lock connecting structures are connected with the locking structures in the vertical direction so that the quick-change battery pack can be connected to the vehicle body girder in a locking mode. According to the electric vehicle, the quick-change battery pack can move in the vertical direction, locking connection of the lock connecting structure and the locking structure is achieved, quick disassembly or connection of the quick-change battery pack is achieved, and the battery changing efficiency of the electric vehicle is greatly improved. And meanwhile, chassis battery replacement can be conducted on the electric vehicle, the battery replacement station can achieve hoisting of the battery pack without arranging a lifting tool, and therefore the occupied area of the battery replacement station is reduced, and the land cost of the battery replacement station is reduced.

Description

[0001] This application is a divisional of the Chinese invention patent with the application date of December 31, 2021, application number 202111673681.4, and name “Electric Vehicle”. Technical Field

[0002] The invention relates to an electric vehicle. Background Art

[0003] At present, the battery packs on electric vehicles are all installed above the load-bearing beams. The weight of the battery packs reaches about 3 tons. The battery packs are heavy, and the load-bearing beams are used to support the battery packs. There are two main ways to charge the battery packs on electric vehicles: charging and battery replacement. Since the battery replacement method can realize the rapid replenishment of electric energy, it reduces the waiting time of customers and improves the utilization rate of the battery replacement station. In addition, the batteries can be charged centrally at night to realize the "peak energy storage" of the power load. At the same time, it improves the comprehensive utilization efficiency of power equipment and extends the service life of the battery, which has high promotion value and economic significance.

[0004] Since the battery pack is placed above the load beam, it is located higher than the ground on the electric vehicle, which makes the center of gravity of the electric vehicle higher, resulting in poor vehicle safety and taking up a large space behind the driver, which makes the driving experience worse for the driver. At the same time, the battery pack is placed in a limited space, making battery pack replacement more complicated and difficult. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an electric vehicle in order to overcome the defect that the battery pack of the electric vehicle is relatively complicated to replace in the prior art.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] An electric vehicle, comprising:

[0008] Two vehicle body beams spaced apart in a vehicle width direction, both of which extend in a vehicle length direction;

[0009] A plurality of locking structures connected to the vehicle body beam;

[0010] A quick-change battery pack, wherein the quick-change battery pack has a plurality of lock connection structures, and the lock connection structures are connected to the locking structures in a vertical direction so as to lock and connect the quick-change battery pack to the vehicle body beam;

[0011] The electric vehicle further comprises a battery tray, the battery tray is connected to the vehicle body beam, and a plurality of the lock connection structures are locked and connected to the battery tray;

[0012] The battery tray includes a tray body, which is fixedly connected to the bottom of the vehicle body beam and / or the side wall of the vehicle body beam, or the battery tray includes two tray bodies, which are respectively fixedly connected to the opposite sides of two vehicle body beams;

[0013] The tray body includes an outer frame, and a plurality of locking structures are arranged on the outer frame and are respectively connected to a plurality of lock connection structures on the edge of the quick-change battery pack;

[0014] The locking structure is connected to the outer frame via a mounting seat;

[0015] The locking structure comprises a locking seat, and the locking seat is provided with an opening for the lock connection structure to enter upwards along the height direction of the vehicle, and the opening is directed downwards.

[0016] In this solution, the above-mentioned structural form is adopted, and the quick-change battery pack can be moved in the vertical direction to realize the locking connection between the lock connection structure and the locking structure, thereby realizing the rapid disassembly or connection of the quick-change battery pack, thereby greatly improving the battery replacement efficiency of electric vehicles.

[0017] The battery tray is connected to the quick-change battery pack, so that the contact area between the battery tray and the quick-change battery pack is large, and the quick-change battery pack can be installed on the battery tray more stably.

[0018] The battery tray is extended along the width direction of the electric vehicle, the connection area between the battery tray and the quick-change battery pack is increased, and the capacity of the battery cells in the quick-change battery pack is increased, thereby increasing the range of the electric vehicle.

[0019] The multiple locking structures distributed on the outer frame are respectively connected to the multiple lock connection structures on the outer edges of the quick-change battery pack. The weight of the quick-change battery pack will be transferred to the corresponding positions of the outer frame through the multiple circumferential lock connection structures, dispersing the load on the outer frame, effectively preventing the quick-change battery pack and the tray body from being deformed due to excessive force at a single point, and improving the stability of the quick-change battery pack connected to the tray body.

[0020] By arranging a mounting seat on the outer frame, the locking structures are all arranged on the mounting seat, so that the installation of the locking structure is convenient and the installation precision is high.

[0021] The quick disassembly or connection of the quick-change battery pack is realized, which greatly improves the battery replacement efficiency of the electric vehicle. At the same time, the locking seat has a simple structure and is easy to process and manufacture.

[0022] Preferably, the quick-change battery pack is located below the vehicle body beam.

[0023] In this solution, the above-mentioned structural form is adopted. Compared with the prior art, the quick-change battery pack is arranged above the load-bearing beam of the electric vehicle. The quick-change battery pack of this solution is arranged below the body beam, thereby lowering the center of gravity of the electric vehicle and improving the driving stability of the electric vehicle. At the same time, the electric vehicle can perform chassis battery replacement, and the battery swap station does not need to set up a hoist to realize the lifting of the quick-change battery pack. Therefore, the area occupied by the battery swap station is reduced, which reduces the land cost of the battery swap station.

[0024] Preferably, the battery tray is connected to the bottom of the vehicle body beam and / or the side of the vehicle body beam.

[0025] In this solution, the above-mentioned structural form is adopted to realize the diversification of the installation connection form between the battery tray and the vehicle body beam. At the same time, the battery tray can be extended along the width direction of the electric vehicle, so that the connection area between the battery tray and the quick-change battery pack is larger, the connection is more stable, and the battery cell capacity in the quick-change battery pack is increased, thereby increasing the range of the electric vehicle.

[0026] Preferably, at least a portion of the battery tray is located on a side of the vehicle body beam, and the locking structure is provided at a bottom of the battery tray.

[0027] In this solution, the above structural form is adopted to further improve the stability of the connection between the battery tray and the vehicle body beam. At the same time, the locking structure is arranged at the bottom of the battery tray to realize the chassis battery replacement of the electric vehicle, and the quick replacement battery pack is easy to install.

[0028] Preferably, the tray body also includes a reinforcing rod, which is connected to the outer frame, and a plurality of locking structures are arranged on the reinforcing rod and are respectively connected to a plurality of lock connection structures in the middle area of ​​the quick-change battery pack.

[0029] In this solution, the above-mentioned structural form is adopted, and the reinforcing rod has the function of reinforcing the overall structural strength of the tray body. At the same time, the multiple locking structures arranged on the reinforcing rod are respectively connected to the multiple lock connection structures in the middle area of ​​the quick-change battery pack. By distributing several lock connection structures around the periphery and the middle area of ​​the quick-change battery pack, the load is evenly distributed throughout the quick-change battery pack, effectively avoiding deformation of the battery pack and greatly improving the stability and seismic resistance of the quick-change battery pack.

[0030] Preferably, the height of the locking structure located on the outer frame is smaller than the height of the locking structure located on the reinforcing rod.

[0031] In this solution, the above-mentioned structural form is adopted, and the tray main body is mounted on the quick-change battery pack and limits the quick-change battery pack in the horizontal direction, effectively avoiding the shaking of the quick-change battery pack during use and further improving the stability of the electric vehicle.

[0032] Preferably, the locking structure includes a locking seat, which has an opening groove extending in the vertical direction and a locking groove extending in the horizontal direction. The lock connection structure is a locking shaft, and the locking groove is used for the locking shaft to be inserted and locked. The top of the opening groove is connected to the locking groove, and the locking shaft enters the locking groove when it reaches the intersection of the opening groove and the locking groove from the bottom of the opening groove in the vertical direction.

[0033] In this solution, the above-mentioned structural form is adopted, and the quick-change battery pack can be locked or unlocked by moving in the vertical direction and the horizontal direction, which makes installation and disassembly very convenient.

[0034] Preferably, at least a portion of the locking seat is provided with a locking tongue, and the locking tongue is movably mounted in the locking groove and can prevent the locking shaft from escaping from the locking groove.

[0035] In the present solution, the above-mentioned structural form is adopted, and the lock tongue is extended into the locking groove, so as to prevent the lock connection structure from escaping from the locking groove, and the lock connection structure is stably inserted into the locking groove, and the locking is more reliable, thereby improving the stability of the electric vehicle in the locked state.

[0036] Preferably, the locking structure further comprises a locking link, and the locking link is movably connected to the locking seat via the locking tongue.

[0037] In this solution, the above-mentioned structural form is adopted, and the lock link will drive the lock tongue to close or open the locking groove under the action of external force, making the locking more reliable; at the same time, the lock link can realize the synchronous unlocking or locking of multiple lock tongues, thereby improving the unlocking efficiency.

[0038] Preferably, the locking structure comprises a locking seat, the locking seat has an opening extending in a vertical direction, a first threaded portion or a limiting portion is provided in the opening, and the locking connection structure has a matching second threaded portion or a stop portion.

[0039] In this solution, the above-mentioned structural form is adopted, the lock connection structure and the locking seat realize vertical up and down locking, the relative locking or unlocking speed between the locking structure and the lock connection structure is fast, and the installation connection form is diversified.

[0040] Preferably, a battery-end electrical connector is provided at the front end of the quick-change battery pack, and a vehicle-end electrical connector is provided at the front end of the battery tray, and the battery-end electrical connector is vertically connected to the vehicle-end electrical connector.

[0041] In this solution, the above-mentioned structural form is adopted to realize a quick-change battery pack to provide power to the electric vehicle, and the electrical connection is more stable and reliable.

[0042] Preferably, the front end of the quick-change battery pack is also provided with a battery-end liquid cooling connector, and the front end of the battery tray is also provided with a vehicle-end liquid cooling connector, and the battery-end liquid cooling connector is vertically connected to the vehicle-end liquid cooling connector.

[0043] In this solution, the above structure is adopted to achieve cooling of the quick-change battery pack. At the same time, the liquid cooling connection is more stable and reliable.

[0044] Preferably, the quick-change battery pack includes a battery pack case, battery cells and a case cover, the battery pack case is provided with a plurality of battery cell accommodating cavities for placing battery cells, the top of the battery cell accommodating cavities has an opening, the case cover is connected to the battery pack case and is used to cover the opening of the battery cell accommodating cavities, and a plurality of the lock connection structures are respectively connected to the battery pack case and the case cover.

[0045] In this solution, the above-mentioned structural form is adopted, and the battery cell is conveniently installed in the battery cell accommodating cavity through the opening, and then the battery cell in the battery pack box is covered by the box cover, which is convenient for installation and has high stability.

[0046] Preferably, the battery pack case includes a frame, a bottom plate and a plurality of mounting bases, the bottom plate is connected to the bottom of the frame and forms a plurality of battery cell accommodating cavities, the case cover is connected to the frame, the mounting bases are respectively connected to at least two ends of the battery pack case, and a plurality of the locking connection structures are respectively connected to the mounting bases.

[0047] In this solution, the above-mentioned structural form is adopted, and the installation of the lock connection structure is facilitated by the installation base, and the installation accuracy is high; and it can be used to transfer the load around the quick-change battery pack, effectively avoiding the deformation of the quick-change battery pack and improving the stability of the quick-change battery pack. At the same time, the overall structure is simple and the installation setting is very convenient.

[0048] Preferably, a reinforcing beam is provided in the frame, and the locking connection structure passes through the box cover and is connected to the reinforcing beam.

[0049] In this solution, the above structural form is adopted, and the reinforcing beam has a reinforcing effect, which effectively strengthens the overall structural strength of the quick-change battery pack and effectively avoids the deformation of the quick-change battery pack. At the same time, the lock connection structure is connected to the reinforcing beam, so that the connection between the lock connection structure and the quick-change battery pack is more stable, further improving the stability of the electric vehicle.

[0050] Preferably, a seal is provided between the lock connection structure and the box cover.

[0051] In the present solution, the above-mentioned structural form is adopted, and the seal will seal the gap between the lock connection structure and the box cover, thereby preventing foreign objects from entering the quick-change battery pack, greatly improving the safety and stability of the quick-change battery pack.

[0052] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0053] The positive and progressive effects of the present invention are:

[0054] The electric vehicle of the present invention can quickly change the battery pack by moving in the vertical direction to achieve the locking connection between the lock connection structure and the locking structure, and quickly disassemble or connect the quick-change battery pack, which greatly improves the battery replacement efficiency of the electric vehicle. At the same time, the electric vehicle can perform chassis battery replacement, and the battery replacement station does not need to set up a hoist to achieve the lifting of the battery pack. Therefore, the area occupied by the battery replacement station is reduced, so that the land cost of the battery replacement station is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is a schematic structural diagram of an electric vehicle according to Embodiment 1 of the present invention;

[0056] Figure 2 This is a schematic structural diagram of the electric vehicle according to Embodiment 1 of the present invention from another viewing angle;

[0057] Figure 3 This is a schematic diagram of the exploded structure of an electric vehicle according to Embodiment 1 of the present invention;

[0058] Figure 4 It is a structural schematic diagram of a battery tray according to Embodiment 1 of the present invention;

[0059] Figure 5 This is a schematic diagram of the structure of a quick-change battery pack according to Embodiment 1 of the present invention;

[0060] Figure 6 This is a schematic diagram of the exploded structure of the quick-change battery pack of Example 1 of the present invention;

[0061] Figure 7 This is a schematic diagram of a portion of the internal structure of the quick-change battery pack before locking according to Embodiment 1 of the present invention;

[0062] Figure 8 This is a schematic diagram of part of the internal structure of the quick-change battery pack after being locked according to Example 1 of the present invention.

[0063] Fig. 9 This is a schematic structural diagram of a locking structure according to Embodiment 2 of the present invention;

[0064] Fig.10 Schematic diagram of the exploded structure of the locking structure of Example 2 of the present invention.

[0065] Fig.11 It is a three-dimensional schematic diagram of the mounting base in Embodiment 3 of the present invention;

[0066] Fig.12 is another three-dimensional schematic diagram of the mounting base in Embodiment 3 of the present invention;

[0067] Fig.13 is a cross-sectional schematic diagram of a mounting base in Embodiment 3 of the present invention;

[0068] Fig.14 is another cross-sectional schematic diagram of the mounting base in Embodiment 3 of the present invention;

[0069] Fig.15 It is a partial cross-sectional schematic diagram of the hanging assembly in Embodiment 3 of the present invention;

[0070] Fig.16 It is a partial schematic diagram of the hanging assembly in Embodiment 3 of the present invention;

[0071] Fig.17 is a three-dimensional schematic diagram of a hanging assembly in Embodiment 3 of the present invention;

[0072] Fig.18 is a cross-sectional schematic diagram of a hanging assembly in Embodiment 3 of the present invention;

[0073] Fig.19 It is an exploded schematic diagram of the hanging assembly in Example 3 of the present invention;

[0074] Fig. 20 It is an exploded cross-sectional schematic diagram of the hanging assembly in Example 3 of the present invention;

[0075] Fig.21 is a schematic diagram of a hanging assembly in Embodiment 3 of the present invention;

[0076] Fig. 22 is a schematic diagram of a guide member in Embodiment 3 of the present invention;

[0077] Fig.23 This is a partial schematic diagram of a battery replacement pack in Embodiment 3 of the present invention;

[0078] Fig.24 It is a partial cross-sectional schematic diagram of a battery replacement battery pack in Embodiment 3 of the present invention;

[0079] Fig.25 It is a partial three-dimensional schematic diagram of a battery replacement battery pack in Embodiment 3 of the present invention;

[0080] Fig.26 is a schematic diagram of a hooking device in Embodiment 3 of the present invention;

[0081] Fig. 27 is another schematic diagram of the hooking device in Embodiment 3 of the present invention;

[0082] Fig.28 is a first cross-sectional schematic diagram of a hooking device in Embodiment 3 of the present invention;

[0083] Fig.29 is a second cross-sectional schematic diagram of the hanging device in Embodiment 3 of the present invention;

[0084] Fig.30 is a third cross-sectional schematic diagram of the hanging device in Embodiment 3 of the present invention;

[0085] Fig.31 is a fourth cross-sectional schematic diagram of the hanging device in Embodiment 3 of the present invention;

[0086] Fig.32 is a three-dimensional schematic diagram of another hanging device in embodiment 3 of the present invention;

[0087] Fig.33 It is a fifth cross-sectional schematic diagram of another hanging device in embodiment 3 of the present invention.

[0088] Fig.34 It is a partial schematic diagram of the hanging assembly in Embodiment 4 of the present invention;

[0089] Fig.35 is a schematic diagram of a guide groove in Embodiment 4 of the present invention;

[0090] Fig.36 is another schematic diagram of the guide groove in Embodiment 4 of the present invention;

[0091] Fig.37 It is an exploded schematic diagram of the hanging assembly in Embodiment 4 of the present invention;

[0092] Fig.38 is a cross-sectional schematic diagram of a hooking device in Embodiment 4 of the present invention;

[0093] Fig.39 is another cross-sectional schematic diagram of the hooking device in Embodiment 4 of the present invention;

[0094] Fig.40 is a schematic diagram of a mounting base in Embodiment 4 of the present invention;

[0095] Fig.41 This is a schematic diagram of a battery replacement pack in Embodiment 4 of the present invention;

[0096] Fig.42 It is a schematic cross-sectional view of the middle area of ​​the battery replacement battery pack in Embodiment 4 of the present invention;

[0097] Fig.43 This is a schematic diagram of the edge of the battery replacement battery pack in Example 4 of the present invention.

[0098] Fig.44 is a schematic diagram of a mounting base in Embodiment 5 of the present invention;

[0099] Fig.45 It is a first stereoscopic schematic diagram of the mounting base in Embodiment 5 of the present invention;

[0100] Fig.46 It is a second stereoscopic schematic diagram of the mounting base in Embodiment 5 of the present invention;

[0101] Fig.47 is a third stereoscopic schematic diagram of the mounting base in Embodiment 5 of the present invention;

[0102] Fig.48 It is an exploded schematic diagram of the mounting base in Embodiment 5 of the present invention;

[0103] Fig.49 is a cross-sectional schematic diagram of another hanging device in embodiment 5 of the present invention;

[0104] Fig.50 It is a three-dimensional schematic diagram of the first part of the hanging device in Embodiment 5 of the present invention;

[0105] Fig.51 It is a perspective schematic diagram of the second part of the hanging device in Embodiment 5 of the present invention;

[0106] Fig.52 It is a three-dimensional schematic diagram of the third part of the hanging device in Embodiment 5 of the present invention;

[0107] Fig.53 It is a partial exploded schematic diagram of the hooking device in Embodiment 5 of the present invention;

[0108] Fig.54 This is a schematic diagram of the edge portion of the battery replacement battery pack in Embodiment 5 of the present invention;

[0109] Fig.55 It is a three-dimensional schematic diagram of the first part of the battery replacement battery pack in Embodiment 5 of the present invention;

[0110] Fig.56 It is a perspective schematic diagram of the second part of the battery replacement battery pack in Embodiment 5 of the present invention;

[0111] Fig.57 It is a schematic cross-sectional view of the middle area of ​​the battery replacement battery pack in Embodiment 5 of the present invention;

[0112] Fig.58 It is a three-dimensional schematic diagram of the battery replacement battery pack in Example 5 of the present invention. DETAILED DESCRIPTION

[0113] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0114] Example 1

[0115] like Figures 1 to 8 As shown, this embodiment discloses an electric vehicle, which is a commercial vehicle such as a heavy truck or a light truck. The electric vehicle comprises two vehicle body beams 1 spaced apart in the vehicle width direction, a quick-change battery pack 2 and a plurality of locking structures 3, the two vehicle body beams 1 both extend in the vehicle length direction, the plurality of locking structures 3 are connected to the vehicle body beams 1, the quick-change battery pack 2 has a plurality of lock connection structures 21, and the lock connection structures 21 are connected to the locking structures 3 in the vertical direction to lock the quick-change battery pack 2 to the vehicle body beam 1.

[0116] The several lock connection structures 21 on the quick-change battery pack 2 correspond one-to-one to the several locking structures 3. The quick-change battery pack 2 moves in the vertical direction to connect the several lock connection structures 21 with the several locking structures 3, thereby realizing rapid disassembly or connection of the quick-change battery pack 2, greatly improving the battery replacement efficiency of the electric vehicle.

[0117] The quick-change battery pack 2 is located below the vehicle body beam 1. When the quick-change battery pack 2 is installed, the quick-change battery pack 2 will move to the bottom of the vehicle body beam 1, and then move upward in the vertical direction, so that a plurality of lock connection structures 21 are connected to a plurality of locking structures 3. The quick-change battery pack 2 is installed below the vehicle body beam 1 in a detachable connection manner to achieve chassis battery replacement of the electric vehicle. The quick-change battery pack 2 is easy to install. At the same time, the quick-change battery pack 2 is arranged below the vehicle body beam 1, thereby reducing the overall center of gravity height of the electric vehicle and improving the driving stability of the electric vehicle. At the same time, the electric vehicle can perform chassis battery replacement, and the battery swap station does not need to set up a hoist to realize the lifting of the quick-change battery pack 2. Therefore, the floor space occupied by the battery swap station is reduced, which reduces the land cost of the battery swap station.

[0118] The electric vehicle further includes a battery tray 4, which is connected to the vehicle body beam 1, and a plurality of lock connection structures 21 are locked and connected to the battery tray 4. A plurality of locking structures 3 are arranged on the battery tray 4, and are connected to the quick-change battery pack 2 through the battery tray 4, so as to increase the contact area between the battery tray 4 and the quick-change battery pack 2, so that the quick-change battery pack 2 can be more stably installed and connected to the battery tray.

[0119] The battery tray 4 is connected to the side of the vehicle body beam 1. By connecting the battery tray 4 to the side of the vehicle body beam 1, the installation connection between the battery tray 4 and the vehicle body beam 1 is diversified, and the connection is more stable.

[0120] In other embodiments, the battery tray 4 may also be connected to the bottom of the vehicle body beam 1 , which will not be described in detail here.

[0121] Furthermore, at least part of the battery tray 4 is located on the side of the vehicle body beam 1, and the locking structure 3 is provided at the bottom of the battery tray 4. In this embodiment, the battery tray 4 is connected to the two opposite sides of the vehicle body beam 1, so that the connection between the battery tray 4 and the vehicle body beam 1 is more stable.

[0122] Specifically, the battery tray 4 includes a tray body, and the tray body is fixedly connected to or to the side wall of the vehicle body beam 1. The battery tray 4 is connected to the side wall of the vehicle body beam 1 through the tray body. In other embodiments, the tray body can also be connected to the bottom of the vehicle body beam 1.

[0123] In other embodiments, the battery tray 4 includes two tray bodies, and the two tray bodies are respectively fixedly connected to the opposite sides of the two vehicle body beams 1. The two tray bodies are respectively fixedly connected to the opposite sides of the two vehicle body beams 1, and the locking mechanisms 3 on the two tray bodies are locked with the lock connection structures 21 at the corresponding positions of the quick-change battery pack 2, so that the battery tray 4 is extended along the width direction of the electric vehicle, the connection area between the battery tray 4 and the quick-change battery pack 2 is increased, the battery cell capacity in the quick-change battery pack 2 is increased, and the range of the electric vehicle is increased.

[0124] In this embodiment, the tray body also includes an outer frame 41, and a plurality of locking structures 3 are arranged on the outer frame 41 and are respectively connected to a plurality of lock connection structures 21 at the edge of the quick-change battery pack 2. The plurality of locking structures 3 distributed on the outer frame 41 are respectively connected to a plurality of lock connection structures 21 at the outer edges of the quick-change battery pack 2. The weight of the quick-change battery pack will be transferred to the corresponding positions of the outer frame through the plurality of circumferential lock connection structures, dispersing the load on the outer frame, effectively avoiding deformation of the quick-change battery pack 2 and the tray body due to excessive force at a single point, and improving the stability of the quick-change battery pack 2 connected to the tray body.

[0125] The locking structure 3 is connected to the outer frame 41 through the mounting seat 411. By arranging the mounting seat 411 on the outer frame 41, the locking structure 3 is arranged on the mounting seat 411, which facilitates the installation of the locking structure 3 and has high installation accuracy.

[0126] In this embodiment, the tray body also includes a reinforcing rod 42, which is connected to the outer frame 41. The reinforcing rod is two parallel rods, and both ends of the reinforcing rod are respectively connected to the outer frame 41. A plurality of locking structures 3 are arranged on the reinforcing rod 42 and are respectively connected to a plurality of lock connection structures 21 in the middle area of ​​the quick-change battery pack 2. The reinforcing rod 42 has the function of reinforcing the overall structural strength of the tray body. At the same time, the plurality of locking structures 3 arranged on the reinforcing rod 42 are respectively connected to a plurality of lock connection structures 21 in the middle area of ​​the quick-change battery pack 2. By distributing a plurality of lock connection structures around and in the middle area of ​​the quick-change battery pack, the load is evenly distributed throughout the quick-change battery pack, effectively avoiding deformation of the battery pack, and greatly improving the stability and seismic resistance of the quick-change battery pack.

[0127] The height of the locking structure 3 on the outer frame 41 is smaller than the height of the locking structure 3 on the reinforcing rod 42. An accommodating space for accommodating the quick-change battery pack 2 is formed between the outer frame 41 and the reinforcing rod 42, so that the tray body is sleeved on the quick-change battery pack 2 and limits the quick-change battery pack 2 in the horizontal direction, effectively avoiding the shaking of the quick-change battery pack 2 during use, and further improving the stability of the electric vehicle.

[0128] The locking structure 3 includes a locking seat 31, and the locking seat 31 is provided with an opening 311 for the lock connection structure 21 to enter upward along the height direction of the vehicle, and the opening 311 is downward. The quick-change battery pack 2 will move to the bottom of the vehicle body beam 1, and then move upward along the height direction of the vehicle, so that the lock connection structure 21 enters into the opening 311 and connects with the locking structure 3, so as to realize the locking connection between the quick-change battery pack 2 and the locking structure 3. The quick disassembly or connection of the quick-change battery pack 2 is realized, which greatly improves the battery replacement efficiency of the electric vehicle. At the same time, the locking seat 31 has a simple structure and is easy to process and manufacture.

[0129] like Figure 7 and Figure 8 As shown, in the locking seat 31, the locking seat 31 has an opening extending in the vertical direction, a first threaded portion or a limiting portion is provided in the opening, and the locking connection structure 21 has a matching second threaded portion or a stopper. The locking connection structure 21 enters the locking seat 31 through the opening 311, and the locking connection structure 21 is locked and connected to the locking seat 31 after rotating a certain angle under the action of external force, and the locking connection structure 21 and the locking seat 31 are vertically locked up and down. With the above-mentioned vertical locking structure 3, the relative locking speed between the locking structure 3 and the locking connection structure 21 is fast, the installation connection form is diversified, the connection is more stable, and the structural space utilization rate is high.

[0130] Of course, in other embodiments, the locking structure 3 and the lock connection structure 21 cooperate with each other through any one of screw connection, snap connection, buckle connection, plug connection, hook connection, and mortise and tenon connection to achieve the quick-change battery pack 2 to be installed and connected to the vehicle body beam 1.

[0131] The front end of the quick-change battery pack 2 is provided with a battery-end electrical connector 22, and the front end of the battery tray 4 is provided with a vehicle-end electrical connector 43, and the battery-end electrical connector 22 is vertically connected to the vehicle-end electrical connector 43. The quick-change battery pack 2 is connected to the vehicle-end electrical connector 43 through the battery-end electrical connector 22, so that the quick-change battery pack 2 will be used to provide power to the electric vehicle. At the same time, the battery-end electrical connector 22 is set at the front end of the quick-change battery pack 2. When the quick-change battery pack 2 moves in the vertical direction, the quick-change battery pack 2 is connected to the several locking structures 3 of the vehicle body beam 1 through several lock connection structures 21. At this time, the battery-end electrical connector 22 and the vehicle-end electrical connector 43 are also vertically connected, so that the electrical connection is more stable and reliable, and the installation and disassembly are very convenient.

[0132] The front end of the quick-change battery pack 2 is also provided with a battery-end liquid cooling connector 23, and the front end of the battery tray 4 is also provided with a vehicle-end liquid cooling connector 44. The battery-end liquid cooling connector 23 is vertically connected to the vehicle-end liquid cooling connector 44. The quick-change battery pack 2 is connected to the vehicle-end liquid cooling connector 44 through the battery-end liquid cooling connector 23 to achieve cooling of the quick-change battery pack 2. At the same time, the battery-end liquid cooling connector 23 is set at the front end of the quick-change battery pack 2. When the quick-change battery pack 2 moves in the vertical direction, the quick-change battery pack 2 is connected to the several locking structures 3 of the vehicle body beam 1 through several lock connection structures 21. At this time, the battery-end liquid cooling connector 23 is also vertically connected to the vehicle-end liquid cooling connector 44, which makes the liquid cooling connection more stable and reliable, and is very convenient to install and disassemble.

[0133] The quick-change battery pack 2 includes a battery pack case 24, a battery cell 25 and a case cover 26. The battery pack case 24 is provided with a plurality of battery cell accommodating chambers for accommodating the battery cells 25. The top of the battery cell accommodating chamber has an opening. The case cover 26 is connected to the battery pack case 24 and is used to cover the opening of the battery cell 25 accommodating chamber. A plurality of lock connection structures 21 are respectively connected to the battery pack case 24 and the case cover 26. The opening facilitates the installation of the battery cell 25 in the battery cell accommodating chamber, and then the case cover 26 is used to cover the battery cell 25 in the battery pack case 24. The installation is convenient and the stability is high.

[0134] The battery pack case 24 includes a frame 241, a bottom plate 242 and a plurality of mounting bases 243. The bottom plate 242 is connected to the bottom of the frame 241 and forms the aforementioned plurality of battery cell accommodating cavities. The case cover 26 is connected to the frame 241. The mounting bases 243 are respectively connected to at least two ends of the battery pack case 24. A plurality of locking connection structures 21 are respectively connected to the mounting bases 243.

[0135] By providing mounting bases 243 at at least two ends of the battery pack case 24, the lock connection structure 21 distributed around the quick-change battery pack 2 is arranged on the mounting base 243. Figure 6 As shown, the mounting base 243 is respectively connected to the four sides of the battery pack case 24. The lock connection structure 21 on the mounting base 243 will be connected to the locking structure 3. By setting the mounting base 243 on the four sides of the battery pack body 24, the quick-change battery pack 2 is stably connected to the locking structure 3. The top of the lock connection structure 21 extends in the vertical direction and protrudes from the top surface of the mounting base 243 so as to be connected to the locking structure 3 at the bottom of the battery tray 4, and the bottom of the lock connection structure 21 is exposed to the bottom surface of the mounting base 243, so that the unlocking mechanism acts on the bottom of the lock connection structure 21 to achieve locking or unlocking between the lock connection structure 21 and the locking structure 3. It is convenient to install the lock connection structure 21 with high installation accuracy; and it can be used to transfer loads around the quick-change battery pack 2, effectively avoiding the deformation of the quick-change battery pack 2 and improving the stability of the quick-change battery pack 2. At the same time, by installing the bottom plate 242 at the bottom of the frame 241 and connecting the box cover 26 to the top of the frame 241, the battery pack box 24 has several battery cell accommodating cavities for accommodating the battery cells 25. The overall structure is simple and the installation is very convenient.

[0136] The frame 241 has a reinforcing beam 244, and the lock connection structure 21 passes through the box cover 26 and is connected to the reinforcing beam 244. The reinforcing beam 244 has a reinforcing effect. By setting the reinforcing beam 244 in the frame 241, the overall structural strength of the quick-change battery pack 2 is effectively strengthened, and the deformation of the quick-change battery pack 2 is effectively avoided. At the same time, the lock connection structure 21 is connected to the reinforcing beam 244, so that the connection between the lock connection structure 21 and the quick-change battery pack 2 is more stable, further improving the stability of the electric vehicle.

[0137] There is a seal between the lock connection structure 21 and the box cover 26. The seal will seal the gap between the lock connection structure 21 and the box cover 26, thereby preventing foreign objects from entering the quick-change battery pack 2, greatly improving the safety and stability of the quick-change battery pack 2.

[0138] In specific use, the material of the sealing member can be a rubber material. At the same time, the sealing member is made of rubber material, which can also reduce the wear caused by the friction between the lock connection structure 21 and the sealing member during the rotation process of the lock connection structure 21.

[0139] Example 2

[0140] like Fig. 9 and Fig.10As shown, the same parts of the electric vehicle structure of this embodiment and embodiment 1 will not be repeated, and only the differences will be described. The locking structure 3 includes a locking seat 31, and the locking seat 31 has an opening groove 312 extending in the vertical direction and a locking groove 313 extending in the horizontal direction. The aforementioned opening groove 312 and the locking groove 313 are both connected front to back. The lock connection structure 21 is a lock shaft, and both ends of the lock shaft are connected to the mounting base 243 to keep the lock shaft always located above the end surface of the mounting base 243 close to the battery tray 4. The locking groove 313 is used for the lock shaft to be inserted and locked. The top of the opening groove 312 is connected to the locking groove 313. The lock shaft enters the locking groove 313 when it reaches the intersection of the opening groove 312 and the locking groove 313 from the bottom of the opening groove 312 in the vertical direction.

[0141] When locking, the lock shaft moves upward in the vertical direction, from the bottom of the opening slot 312 to the intersection of the opening slot 312 and the locking slot 313, and then the lock shaft moves in the horizontal direction and enters the locking slot 313, so that the lock shaft is inserted and locked into the locking slot 313 to achieve the locking of the lock connection structure 21 and the locking structure 3. When unlocking, the lock shaft will move in the horizontal direction to the intersection of the opening slot 312 and the locking slot 313, and then the lock shaft moves downward in the vertical direction, so that the lock shaft is separated from the locking seat 31 from the bottom of the opening slot 312, so as to achieve the unlocking of the lock connection structure 21 and the locking structure 3. The quick-change battery pack 2 can be locked or unlocked by moving in the vertical and horizontal directions, and it is very convenient to install and disassemble.

[0142] At least part of the locking seat 31 is provided with a locking tongue 32, which is movably installed in the locking groove 313 and can prevent the lock shaft from escaping from the locking groove 313. The locking tongue 32 extends into the locking groove 313, thereby preventing the lock connection structure 21 from escaping from the locking groove 313, and realizing that the lock connection structure 21 is stably inserted into the locking groove 313, and the locking is more reliable, thereby improving the stability of the electric vehicle in the locked state.

[0143] The locking structure 3 also includes a locking link 33, which is movably connected to the locking seat 31 through the locking tongue 32. The locking link 33 will drive the locking tongue 32 to close or open the locking groove 313 under the action of external force, making the locking more reliable; at the same time, the locking link 33 can realize the synchronous unlocking or locking of multiple locking tongues 32, thereby improving the unlocking efficiency.

[0144] Example 3

[0145] like Figures 11 to 33 As shown, the embodiment of the present invention provides a hanging assembly 2, and the hanging assembly 2 and the hanging seat 1 can be locked with each other. The hanging assembly 2 includes a hanging member 21 and a mounting shell 24, the hanging member 21 is engaged with the mounting shell 24, and the hanging member 21 enters the hanging seat 1 under the action of external force and is hung on the hanging seat 1 after rotating an angle.

[0146] The hook seat 1 in the third embodiment is equivalent to the locking structure in the first embodiment, and the hook assembly 2 is equivalent to the lock connection structure in the first embodiment.

[0147] The mounting seat 1 is connected to the electric vehicle 1000 and is used to cooperate with the mounting member 21 on the battery pack 31 to install the battery pack 31 to the electric vehicle 1000. The mounting seat 1 includes a mounting seat body 11, and a accommodating cavity 111 is provided in the mounting seat body 11. The accommodating cavity 111 is used to accommodate at least part of the mounting member 21. The bottom of the accommodating cavity 111 has a transition area 16 and a mounting area 15. There is a smooth transition between the transition area 16 and the mounting area 15. The height of the transition area 16 in the vertical direction is lower than the height of the mounting area 15. The transition area 16 is used for the mounting member 21 to rotate from the transition area 16 to the mounting area 15. When the mounting seat 1 is locked with the mounting member 21, the mounting member 21 is located in the mounting area 15.

[0148] In specific use, when the hanging member 21 enters the accommodating chamber 111 from the bottom of the hanging seat 1 in the vertical direction and rotates, it first contacts the transition area 16, and then moves in the direction close to the hanging area 15 under the continued action of external force. Since the height of the transition area 16 in the vertical direction is lower than the height of the hanging area 15, and there is a smooth transition between the transition area 16 and the hanging area 15, the above structure first facilitates the rotation of the hanging member 21; secondly, during the rotation of the hanging member 21, the gap between the hanging member 21 and the bottom of the accommodating chamber 111 becomes smaller and smaller. In the process of the gap becoming smaller, the pressure between the hanging member 21 and the bottom of the accommodating chamber 111 becomes greater and greater. Taking the same material as the hanging area 15 and the transition area 16 as an example, when the materials of the two areas are the same, the dynamic friction generated by the hanging member 21 and the transition area 16 will be greater than the dynamic friction generated by the hanging member 21 and the hanging area 15. When the hanging member 21 moves to the hanging area 15, since the gap between the hanging member 21 and the hanging area 15 is the smallest, the friction force generated at this time is also the largest, and finally the hanging member 21 is stably hung. With the above-mentioned structural form, the hanging member 21 minimizes the gap between the hanging member 21 and the hanging seat 1 through the rotation movement, so that the hanging member 21 can be stably hung on the hanging seat 1, improving the stability of the hanging of the battery pack 31, and the above-mentioned method increases the hanging points of the battery pack 31 and the electric vehicle 1000, avoiding the deformation of the battery pack 31 due to the sinking of the middle area caused by the excessive size. In other embodiments, different materials can be selected for the hanging area 15 and the transition area 16 to further reduce the friction between the hanging member 21 and the transition area 16, and further increase the friction between the hanging member 21 and the hanging area 15, and the materials of the hanging area 15 and the transition area 16 are not restricted here. The above-mentioned external force can be achieved by applying force to the hanging member by the unlocking device. In this method, after lifting the battery pack in the vertical direction, the battery pack can be locked and fixed only by rotating the hanging part, avoiding the need to move the hanging part to the locked position by moving the battery pack. There is no need to reserve horizontal moving space for the battery pack at the bottom of the electric vehicle, which simplifies the steps of moving the battery pack, reduces the difficulty of locking control, and improves the efficiency of battery replacement.

[0149] The above-mentioned hanging plate 40 can be realized by a stamping process, and the height of the transition area 16 in the vertical direction is lower than the height of the hanging area 15. After the above process, the hanging area 15 and the transition area 16 are integrally formed and have the characteristics of high strength. Alternatively, the hanging area 15 and the transition area 16 are in the same plane, and a cushioning structure is set in the hanging area 15. The above method will make the upper surface of the cushioning structure higher than the upper surface of the transition area 16, so when the hanging part 21 rotates to the hanging area 15, the hanging part 21 can be hung on the upper surface of the cushioning structure. In order to further improve the friction of the hanging part 21 in the hanging area 15, the material of the cushioning structure is preferably rubber. Of course, in other embodiments, the material of the cushioning structure may not be restricted. With the above-mentioned structural form, a cushioning structure is set in the hanging area 15, and different hanging parts 21 can be adapted by changing the thickness of the cushioning structure, thereby improving the flexibility of the hanging.

[0150] The top of the mounting seat body 11 has a matching hole 13, which is used to avoid the mounting member 21 when the mounting member 21 moves in the accommodating cavity 111. With the above-mentioned structural form, the matching hole 13 at the top of the mounting seat body 11 reduces the influence of the mounting seat 1 on the movement of the mounting member 21. During the rotation process, as the mounting member 21 moves toward the mounting area 15, the mounting member 21 has an upward displacement, and the protrusion on the mounting member 21 can extend out of the mounting seat 1 through the matching hole 13, thereby preventing the protrusion and the mounting seat 1 from being squeezed and damaged, thereby improving the service life of the mounting member 21 and the mounting seat 1.

[0151] The mounting seat 1 also includes a mounting portion 14, which is arranged on at least two sides of the top of the mounting seat body 11, and the mounting portion 14 has a plurality of mounting holes for mounting the mounting seat 1 on the electric vehicle 1000. Specifically, the top opening 12 of the mounting portion 14 extends outward to form the mounting portion 14, and at least two sides of the opening 12 extending outward to form the mounting portion 14. Alternatively, the mounting seat 1 also includes a mounting plate, which is connected to the top of the mounting seat body 11, and the portion of the mounting plate protruding from the mounting seat body 11 is the mounting portion 14. Of course, in other embodiments, the formation method of the mounting portion 14 may not be limited. With the above-mentioned structural form, the mounting holes on the mounting portion 14 can be used to realize the connection between the mounting seat body 11 and the chassis of the electric vehicle 1000, and the mounting portion 14 is arranged on at least two sides of the top of the mounting seat body 11, thereby increasing the connection area between the mounting portion 14 and the mounting seat 1, and improving the connection stability between the mounting portion 14 and the mounting seat 1. Preferably, the mounting portion 14 is symmetrically arranged on the top of the mounting seat body 11 to further improve the stability of the mounting.

[0152] The hanging assembly 2 includes a first gearing 27 and a second gearing 28. The first gearing 27 is fixed in the mounting shell 24, and the second gearing 28 is connected to the hanging member 21. The second gearing 28 is located in the mounting shell 24 and can move in the mounting shell 24 to switch between the first state and the second state. In the first state, the first gearing 27 and the second gearing 28 are engaged. In the second state, the second gearing 28 is disengaged from the first gearing 27, and the second gearing 28 drives the hanging member 21 to rotate. The above statement can also be specifically expressed as: in the first state, since the first gearing 27 is fixed in the mounting shell 24, the first gearing 27 and the second gearing 28 are engaged, and then the second gearing 28 can be limited by the first gearing 27 to prevent the second gearing 28 from rotating. That is, the second gearing 28 prevents the hanging member 21 from rotating, so that the hanging member 21 is stably hung on the hanging seat 1. In the second state, under the action of external force, the second engagement member 28 moves upward and disengages from the first engagement member 27. Without the constraint of the first engagement member 27, the second engagement member 28 can be driven to rotate by the action of external force, so that the second engagement member 28 can drive the hanging member 21 to rotate, and finally the hanging portion 212 is hung on the hanging seat 1 after rotating by an angle. With the above-mentioned structural form, the first state is the state in which the hanging portion 212 is hung on the hanging seat 1, that is, the hanging member 21 is in the hanging area 15 at this time. In this state, the stability and reliability of the hanging are improved by preventing the rotation of the hanging member 21; the second state is the state in which the hanging portion 212 is not hung, that is, the hanging member 21 is in a state in which it does not reach the hanging area 15 at this time. In this state, the rotation of the hanging portion 212 can be realized by external force to realize the subsequent hanging.

[0153] The second engagement member 28 includes a matching portion 281, an elastic portion 282 and an engagement portion 283 arranged in sequence from top to bottom, the two ends of the elastic portion 282 are respectively in contact with the matching portion 281 and the engagement portion 283, and the lower end of the hanging member 21 is connected to the matching portion 281; in the first state, the engagement portion 283 is engaged with the first engagement member 27, and the matching portion 281 is disengaged from the engagement portion 283; in the second state, the engagement portion 283 is disengaged from the first engagement member 27, and the matching portion 281 is engaged with the engagement portion 283, so that the engagement portion 283 drives the matching portion 281 and the hanging member 21 to rotate. The above statement can be specifically described as follows: in the first state, since the first engagement member 27 is fixed in the mounting shell 24, the engaged engagement portion 283 cannot rotate under the restriction of the first engagement member 27, and at this time, under the action of the elastic portion 282, the matching portion 281 is disengaged from the engagement portion 283. In this state, even if an external force is applied, the hanging member 21 cannot rotate, thereby achieving reliable hanging. In the second state, under the action of external force, the meshing portion 283 moves upward, so that the meshing portion 283 is disengaged from the first meshing member 27, and the meshing portion 283 after moving upward compresses the elastic portion 282 to achieve the matching of the matching portion 281 and the meshing portion 283; at this time, driven by the external force, the meshing portion 283 rotates and then drives the matching portion 281 and the hanging member 21 to rotate an angle and then hook on the hanging seat 1, thereby achieving the hanging of the battery pack 31 and the hanging seat 1. Specifically, the mounting shell 24 can have an avoidance hole 29, and the avoidance hole 29 is connected to the meshing cavity, and the unlocking device extends into the meshing cavity through the avoidance hole 29 to contact the hanging member 21. That is, in the second state, the unlocking device can first realize the upward movement of the meshing portion 283 and the disengagement of the first meshing member 27, and then the unlocking device drives the rotation of the matching portion 281 and the hanging member 21 through the meshing portion 283, and then the hanging portion 212 is hung with the hanging seat 1 through the unlocking device. After hanging, the unlocking device disengages from the meshing portion 283, and the meshing portion 283 moves downward under the action of the elastic portion 282. The meshing portion 283 after moving downward is engaged with the first meshing member 27, and finally a stable hanging is realized. The avoidance hole 29 can be located at the bottom of the mounting shell 24, which facilitates the hanging and removal of the battery pack 31.

[0154] In specific use, the meshing portion 283 has an inner hexagon, and the matching portion 281 has an outer hexagon that matches the inner hexagon; in the second state, the inner hexagon matches the outer hexagon to achieve the matching of the meshing portion 283 and the matching portion 281. Of course, in other embodiments, the meshing portion 283 can also be matched with the matching portion 281 in other ways, which is not limited again. In this embodiment, the elastic portion 282 is a spring. In other embodiments, the elastic portion 282 can also be other elastic components such as disc springs, which are not limited here.

[0155] The mounting shell 24 has a rotation guide groove 23, and the hanging member 21 moves along the rotation guide groove 23. With the above structure, the hanging member 21 can be guided by the rotation guide groove 23, and the cooperation between the rotation guide groove 23 and the hanging member 21 improves the stability of the movement of the hanging member 21.

[0156] The hook assembly 2 also includes a guide member 22, which is arranged in the mounting shell 24, and the rotation guide groove 23 is located in the guide member 22. With the above-mentioned structural form, if one of the guide member 22 and the mounting shell 24 is damaged, it is only necessary to replace the damaged guide member 22 and the mounting shell 24 to use it normally, and when different hook members 21 are suitable for different rotation guide grooves 23, only the guide member 22 can be replaced, thereby reducing the cost of use. Specifically, the rotation guide groove 23 is arranged along the circumference of the guide member 22, and the connecting portion 211 includes a hook body 2111 and a guide pin 2112, and the guide pin 2112 extends outward from the hook body 2111 in the horizontal direction. Through the cooperation of the guide pin 2112 and the rotation guide groove 23, the hook body 2111 can be guided during the movement, and the cooperation of the rotation guide groove 23 and the guide pin 2112 can also reduce the friction during the rotation of the hook member 21.

[0157] The guide member 22 is an annular structure, and a first groove 221 is provided on the outer side of the guide member 22. A stop pin 26 is provided in the first groove 221. The stop pin 26 partially protrudes from the outer wall of the guide member 22, and is used to position the guide member 22 to be installed in the mounting shell 24, and to limit the position of the guide member 22 in the mounting shell 24. With the above-mentioned structural form, the stop pin 26 prevents the guide member 22 from rotating in the mounting shell 24, that is, the stop pin 26 can limit the guide member 22. Specifically, the number of the first grooves 221 can be multiple, and the multiple first grooves 221 are symmetrically arranged on the outer side of the guide member 22, so as to achieve stable positioning of the guide member 22 by the stop pin 26.

[0158] A second groove is provided in the mounting shell 24, and the second groove matches the stop pin 26. With the above structure, the second groove forms an escape space for the stop pin 26, so that the stop pin 26 protruding from the guide member 22 can be inserted conveniently.

[0159] During specific use, the first groove 221 is first matched with the second groove, and then the guide pin 2112 is inserted to achieve positioning of the guide member 22.

[0160] The lower end of the hanging body 2111 has a first threaded portion, and the second engaging member 28 has a second threaded portion that cooperates with the first threaded portion, that is, the matching portion 281 is provided with a second threaded portion, and a stable connection between the hanging body 2111 and the matching portion 281 is achieved through threaded connection.

[0161] The first threaded portion is located below the guide pin 2112 , facilitating the connection between the hanging body 2111 and the second engaging member 28 .

[0162] The hanging member 21 includes a connecting portion 211 and a hanging portion 212. One end of the connecting portion 211 is engaged with the battery pack 31. The connecting portion 211 has a connecting hole. The hanging portion 212 passes through the connecting hole and is connected to the connecting portion 211. With the above structure, the hanging portion 212 and the connecting portion 211 can be processed and manufactured separately, ensuring the strength requirements of the hanging portion 212 and the connecting portion 211, and having the characteristics of not easy to deform and fast processing.

[0163] During specific use, the hanging portion 212 and the connecting portion 211 are both cylindrical, so that when they are in rotational contact with the hanging seat 1, the wear of the hanging seat 1 can be reduced, thereby increasing the service life.

[0164] There are two hooking areas 15, which are located on both sides of the bottom of the accommodating cavity 111. The two ends of the hooking member 21 have two hooking parts 212, and the hooking parts 212 and the hooking areas 15 are hooked one by one. Specifically, the hooking part 212 passes through the connecting hole, and the two ends of the hooking part 212 are respectively matched and connected with the bottom of the electric vehicle 1000. The connecting part 211 is connected to the chassis of the electric vehicle 1000 through the hooking part 212. The two ends of the hooking part 212 act on the bottom of the electric vehicle 1000, which increases the hooking of the battery pack 31 and the bottom of the electric vehicle 1000. On the one hand, it increases the connection points between the battery pack 31 and the electric vehicle 1000, improves the installation stability, and avoids the deformation of the battery pack 31 due to the sinking of the middle area caused by the excessive size. On the other hand, it limits the movement of the battery pack 31 relative to the electric vehicle 1000, and improves the shock resistance of the battery pack 31 during the driving of the electric vehicle 1000.

[0165] The two ends of the hooking part 212 exposed from the connecting part 211 are provided with shaft sleeves 214, and the hooking part 212 contacts the hooking area 15 through the shaft sleeves 214. By providing the shaft sleeves 214 at the two ends of the hooking shaft exposed from the second connecting part 211, friction is reduced, the stability of the hooking part 212 and the hooking seat 1 is ensured, and the service life is extended; at the same time, the two ends of the hooking shaft are evenly stressed, and the stability of the battery pack 31 is improved.

[0166] A retaining ring 213 is provided at both ends of the hanging portion 212. The retaining ring 213 is provided on the side of the sleeve 214 away from the connecting portion 211, and the retaining ring 213 is used to limit the sleeve 214 from being separated from the hanging portion 212. The retaining ring 213 has a blocking effect and is used to limit the sleeve 214 from being separated from the hanging portion 212, ensuring that the sleeve 214 will not be separated during use, thereby improving stability; at the same time, the structure is simple and the installation and setting are very convenient.

[0167] Grooves 215 are provided on both sides of the hanging part 212, and the grooves 215 are used to install the sleeve 214. The sleeve 214 is sleeved in the groove 215, and the inner wall surface of the groove 215 and the retaining ring 213 simultaneously restrict the sleeve 214, further ensuring that the sleeve 214 will not be separated during use, thereby improving stability; at the same time, the sleeve 214 is installed with higher precision through the groove 215, and the structure is simple, and the installation is very convenient.

[0168] The hanging member 21 further includes a fixing portion 216, which extends from the upper end of the connecting portion 211 and penetrates the hanging portion 212, and is used to connect the connecting portion 211 and the hanging portion 212. With the above-mentioned structural form, the fixing portion 216 extends from the upper end of the connecting portion 211 and penetrates the hanging portion 212 to fix the connecting portion 211 and the hanging portion 212, so that the connection between the hanging portion 212 and the connecting portion 211 is very convenient and has high stability.

[0169] In specific use, the fixing portion 216 may be a bolt. In other embodiments, the fixing portion 216 may also be other components that can connect the connecting portion 211 and the hanging portion 212, which is not limited here.

[0170] The upper end of the hanging member 21 is provided with a guide inclined surface 217. With the above structure, the hanging member 21 can be ensured to move in a predetermined direction without deviation or dislocation during the movement through the guide inclined surface 217, thereby improving the accuracy and stability of the connection.

[0171] The battery pack 31 includes a battery pack body 311 and a battery rack 312. The battery rack 312 is arranged circumferentially along the outer surface of the battery pack body 311. The battery pack body 311 and the battery rack 312 may be provided with a hanging part 21 to achieve the hanging of the middle area and the peripheral area of ​​the battery pack body with the electric vehicle, thereby improving the stability of the battery pack 31 hanging on the chassis. That is, the hanging part 21 located on the battery pack body 311 and the mounting shell 24 located on the battery rack 312 can both be connected to the battery pack 3, thereby improving the stability of the battery pack 3 hanging on the chassis.

[0172] Regarding the method of setting the hanging member 21 on the battery pack body 311, the hanging part is located at the top of the battery pack body 311, the battery pack body 311 has a reinforcing beam 3111, the mounting shell 24 penetrates the reinforcing beam 3111 and is connected to the upper surface of the reinforcing beam 3111 through the fixing base 25 located on the side wall of the mounting shell 24, the bottom of the hanging member 21 is connected to the mounting shell 24, the hanging member 21 penetrates the reinforcing beam 3111 and the battery pack body 311, and protrudes from the upper surface of the battery pack body 311. With the above-mentioned structural form, the connection between the hanging member 21 and the battery pack body 311 is achieved by connecting the fixing base 25 with the reinforcing beam 3111 in the battery pack body 311. The part of the hanging member 21 protruding from the upper surface of the battery pack body 311 can be hung with the hanging seat 1, thereby realizing the hanging of the battery pack body 311 on the chassis of the electric vehicle 1000. This arrangement is particularly suitable for the hanging and locking of battery packs with larger sizes, and improves the hanging effect of the middle area of ​​the battery pack.

[0173] The hanging assembly 2 further includes a seal 30, which is connected to one end of the mounting shell 24 away from the reinforcing beam 3111 and is used to seal the battery pack body 311 and the mounting shell 24. One end of the seal 30 extends into the mounting shell 24 and fits against the inner wall of the mounting shell 24, and the other end of the seal 30 is connected to the upper surface of the battery pack body 311. With the above-mentioned structural form, the seal 30 seals the gap between the hanging component 21 and the mounting shell 24, thereby preventing foreign objects from entering the battery pack 31 from the mounting shell 24 and affecting the service life of the battery pack 31.

[0174] In specific use, the material of the sealing member 30 can be a rubber material. At the same time, the sealing member 30 is made of rubber material, which can also reduce the wear and tear caused by the friction between the hanging member 21 and the sealing member 30 during the rotation of the hanging member 21.

[0175] See also Fig.25 It is understood that in the manner in which the hanging member is arranged on the battery rack 312, the mounting shell 24 penetrates the battery rack 312 and is connected to the lower surface of the battery rack 312 through the fixed base 25 located at the bottom of the mounting shell 24, and the hanging member 21 penetrates the battery rack 312 and protrudes from the upper surface of the battery rack 312. When the hanging member is hung in the hanging seat, under the hanging force, when the mounting shell 24 and the fixed base 25 are subjected to upward pulling force, the battery rack 312 applies downward pressure to the fixed base 25, which can offset the upward pulling force on the fixed base 25, thereby preventing the fixed base 25 from being greatly deformed and affecting the service life. In addition, in the above structure, the bolts can only be used to fix the fixed base 25 and the mounting shell 24, and are not subjected to pulling force, thereby preventing the bolts from being damaged and loosened, thereby improving the reliability of the connection between the battery pack 31 and the chassis of the electric vehicle 1000.

[0176] Example 4

[0177] like Figures 34 to 43 As shown, this embodiment provides a hanging device 100, including the hanging assembly 1 in embodiment 1, and a hanging seat 2, wherein the hanging assembly 1 is used to pass through the slot 213 on the hanging seat 2 and to be mutually locked with the hanging seat 2.

[0178] The hanging seat 2 in the fourth embodiment is equivalent to the locking structure in the first embodiment, and the hanging assembly 1 is equivalent to the lock connection structure in the first embodiment.

[0179] The hanging assembly 1 is used to pass through the slot on the hanging seat and realize mutual locking with the hanging seat. Among them, the hanging assembly 1 is arranged on the battery pack, and the hanging seat is arranged at the bottom of the electric vehicle. The battery pack is locked and connected to the bottom of the electric vehicle by hanging the hanging assembly 1 in the hanging seat 2. The hanging assembly 1 includes a hanging member 11 and a mounting shell 12. The hanging member 11 includes a hanging body 111 and a hanging portion 112, and the hanging portion 112 is arranged at the upper end of the hanging body 111 and extends from the hanging body 111 to both sides in the horizontal direction. The hanging member 11 enters the slot on the hanging seat under the action of external force and is hooked on the hanging seat after rotating the moving angle to realize mutual locking;

[0180] The hook assembly 1 further includes a guide member 13, which is disposed in the mounting shell 12. A guide slot 14 is disposed in the guide member 13, and a guide pin 113 rotates and moves to an unlocked position or a locked position along the guide slot 14. With the above-mentioned structural form, the cooperation between the guide pin 113 and the guide slot 14 can guide the hook member 11 during the rotation process, so that the guide pin 113 can switch between the unlocked position and the locked position by moving in the guide slot 14, and the cooperation between the guide pin 113 and the guide slot 14 can also reduce the friction force generated by the hook member 11 during the movement process.

[0181] The hanging assembly 1 includes a first gearing 16 and a second gearing 17. The first gearing 16 is fixed in the mounting shell 12, and the second gearing 17 is connected to the hanging member 11. The second gearing 17 is located in the mounting shell 12 and can move in the mounting shell 12 to switch between the first state and the second state. In the first state, the first gearing 16 and the second gearing 17 are engaged. In the second state, the second gearing 17 is disengaged from the first gearing 16, and the second gearing 17 drives the hanging member 11 to rotate. The above statement can also be specifically expressed as: in the first state, since the first gearing 16 is fixed in the mounting shell 12, the first gearing 16 and the second gearing 17 are engaged, and then the second gearing 17 can be limited by the first gearing 16 to prevent the second gearing 17 from rotating. That is, the second gearing 17 prevents the hanging member 11 from rotating, so that the hanging member 11 is stably hung on the hanging seat 2. In the second state, under the action of external force, the second engagement member 17 moves upward and disengages from the first engagement member 16. Without the constraint of the first engagement member 16, the second engagement member 17 can be driven to rotate by the action of external force, so that the second engagement member 17 can drive the hanging member 11 to rotate, and finally the hanging portion 112 is hung on the hanging seat 2 after rotating by an angle. With the above-mentioned structural form, the first state is the state in which the hanging portion 112 is hung on the hanging seat 2. In this state, the stability and reliability of the hanging are improved by preventing the rotation of the hanging member 11; the second state is the state in which the hanging portion 112 is not hung. In this state, the rotation of the hanging portion 112 can be achieved by external force to achieve subsequent hanging.

[0182] The second engagement member 17 includes a matching portion 171, an elastic portion 172 and an engagement portion 173 arranged in sequence from top to bottom, the two ends of the elastic portion 172 are respectively in contact with the matching portion 171 and the engagement portion 173, and the lower end of the hanging member 11 is connected to the matching portion 171; in the first state, the engagement portion 173 is engaged with the first engagement member 16, and the matching portion 171 is disengaged from the engagement portion 173; in the second state, the engagement portion 173 is disengaged from the first engagement member 16, and the matching portion 171 is engaged with the engagement portion 173, so that the engagement portion 173 drives the matching portion 171 and the hanging member 11 to rotate. The above statement can be specifically described as: in the first state, since the first engagement member 16 is fixed in the mounting shell 12, the engaged engagement portion 173 cannot rotate under the restriction of the first engagement member 16, and at this time, under the action of the elastic portion 172, the matching portion 171 is disengaged from the engagement portion 173. In this state, even if an external force is applied, the hanging member 11 cannot rotate, thereby achieving reliable hanging. In the second state, under the action of external force, the meshing portion 173 moves upward, so that the meshing portion 173 is disengaged from the first meshing member 16, and the meshing portion 173 after moving upward compresses the elastic portion 172 to achieve the matching of the matching portion 171 and the meshing portion 173; at this time, driven by the external force, the meshing portion 173 rotates and then drives the matching portion 171 and the hanging member 11 to rotate an angle and then hook on the hanging seat 2, thereby achieving the hanging of the battery pack and the hanging seat 2. Specifically, the mounting shell 12 can have an avoidance hole 40, and the avoidance hole 40 is connected to the meshing cavity, and the unlocking device extends into the meshing cavity through the avoidance hole 40 to contact the hanging member 11. That is, in the second state, the unlocking device can first realize the upward movement of the meshing portion 173 to disengage from the first meshing member 16, and then the unlocking device drives the matching portion 171 and the hanging member 11 to rotate through the meshing portion 173, and then the hanging portion 112 is hung with the hanging seat 2 through the unlocking device. After hanging, the unlocking device is disengaged from the meshing portion 173, and the meshing portion 173 moves downward under the action of the elastic portion 172, and the meshing portion 173 after moving downward is engaged with the first meshing member 16, and finally a stable hanging is realized.

[0183] During specific use, the avoidance hole 40 may be located at the bottom of the mounting shell 12 , which facilitates the attachment and removal of the battery pack.

[0184] In specific use, the meshing portion 173 has an inner hexagon, and the matching portion 171 has an outer hexagon that matches the inner hexagon. In the second state, the inner hexagon matches the outer hexagon to achieve the matching of the meshing portion 173 and the matching portion 171; the elastic portion 172 is a spring.

[0185] The lower end of the hanging body 111 has a first threaded portion, and the second engaging member 17 has a second threaded portion that matches the first threaded portion. The hanging body 111 and the matching portion 171 are stably connected through the threaded connection.

[0186] The first threaded portion is located below the guide pin 113 , facilitating the connection between the hanging body 111 and the second engagement member 17 .

[0187] The guide groove 14 includes a first guide groove 141 arranged along the circumference of the guide member 13 and a second guide groove 142 arranged along the height direction of the guide member 13. The first guide groove 141 is connected to the top of the second guide groove 142, and the bottom surface of the first guide groove 141 is higher than the bottom surface of the second guide groove 142. With the above structure, the first guide groove 141 and the guide pin 113 cooperate to guide the hanging member 11 during the rotation process, improve the stability of the rotation, and reduce the friction generated when the hanging member 11 rotates; the first guide groove 141 and the second guide groove 142 are connected at the top, and the bottom surface of the first guide groove 141 is higher than the bottom surface of the second guide groove 142, so that the circumferential movement of the hanging member 11 can be limited by the second guide groove 142. Specifically, in the second state, the guide pin 113 contacts the first guide groove 141, and when the hook 11 rotates, the guide pin 113 can cooperate with the first guide groove 141 to achieve stable rotation; in the first state, the guide pin 113 is located in the second guide groove 142, and the stability of the hooking can be further improved by the second guide groove 142. That is, in the first state, not only the rotation of the hook 11 is prevented by the engagement of the first engagement member 16 and the second engagement member 17, but also the rotation of the hook 11 can be further prevented by the cooperation of the guide pin 113 and the second guide groove 142. In the above manner, the stable rotation and stable hooking of the hook 11 and the hook seat 2 are achieved through the states of the first engagement member 16 and the second engagement member 17 and the cooperation of the guide pin 113 and the guide groove 14.

[0188] The guide pin 113 rotates along the first guide groove 141 to the second guide groove 142 and moves to the locked position along the second guide groove 142, or the guide pin 113 moves along the second guide groove 142 to the first guide groove 141 and rotates to the unlocked position along the first guide groove 141. With the above structure, driven by the unlocking device, after the guide pin 113 rotates along the first guide groove 141 to the second guide groove 142, the unlocking device disengages, and the hooking member 11 moves down, thereby causing the guide pin 113 to move down to the locked position. At this time, the hooking member 11 is also hooked on the hooking seat 2, and the first meshing member 16 and the second meshing member 17 are in meshing state. In the locked position, the second guide groove 142 can limit the guide pin 113 so that the hooking member 11 can only move up and down; when unlocking is required, driven by the unlocking device, the guide pin 113 moves up, so that it moves from the second guide groove 142 to the unlocked position, and the hooking member 11 is also in an unhooked state. After the guide pin 113 is located at the unlocking position, the hanging component 11 can move up and down, and can also rotate.

[0189] The first guide groove 141 is inclined, and the side of the first guide groove 141 close to the second guide groove 142 is lower than the side of the first guide groove 141 away from the second guide groove 142. The above structure facilitates the hanging member 11 to enter the second guide groove 142 from the first guide groove 141. In other embodiments, the first guide groove 141 extends in the horizontal direction.

[0190] A plurality of guide grooves 14 are symmetrically arranged in the guide member 13 , so that the guide grooves 14 guide the guide pins 113 more stably.

[0191] The guide member 13 is an annular structure, and a first groove 131 is provided on the outer side of the guide member 13. A stop pin 15 is provided in the first groove 131, and the stop pin 15 protrudes from the outer wall of the guide member 13. The stop pin 15 is used to position the guide member 13 on the mounting shell 12, and to limit the position of the guide member 13 in the mounting shell 12. With the above-mentioned structural form, the stop pin 15 prevents the guide member 13 from rotating in the mounting shell 12, that is, the stop pin 15 can limit the guide member 13. Specifically, the number of the first grooves 131 can be multiple, and the multiple first grooves 131 are symmetrically arranged on the outer side of the guide member 13, so as to achieve stable positioning of the guide member 13 by the stop pin 15.

[0192] The mounting shell 12 is provided with a second groove, which matches the stop pin 15. With the above structure, the second groove forms an escape space for the stop pin 15, which facilitates the insertion of the stop pin 15 protruding from the outer wall of the guide member 13.

[0193] During specific use, the first groove 131 is first matched with the second groove, and then the guide pin 113 is inserted to achieve positioning of the guide member 13 .

[0194] The mounting assembly 1 further includes a fixing base 50, which is disposed on the outer side of the mounting shell 12 and has a mounting hole. With the above-mentioned structural form, the mounting shell 12 and the battery pack are connected through the mounting hole on the fixing base 50. Specifically, there are multiple fixing bases 50, which are symmetrically disposed on the outer side of the mounting shell 12 to achieve stable installation of the mounting shell 12.

[0195] The fixing base 50 is arranged at the upper end, the lower end or the middle part of the mounting shell 12. With the above structure, the fixing base 50 can be selected to cooperate with the fixing base 50 at different positions of the mounting shell 12 according to the thickness of the battery pack and the mounting position of the fixing base 50, thereby improving the flexibility of the mounting of the hanging member 11.

[0196] The hook assembly 1 further includes a cover 18, which is connected to the top of the mounting shell 12. With the above structure, the cover 18 covers the gap between the hook body and the mounting shell 12 to prevent foreign objects from entering the mounting shell 12, thereby preventing foreign objects from entering the battery pack and affecting the service life of the battery pack 31.

[0197] In specific use, the material of the cover member 18 can be a metal material or a rubber material. Here, the material of the cover member 18 is not limited.

[0198] The top surface of the hanging part 112 is an arc surface, so that the hanging part 112 is not easy to be scratched when moving in the hanging seat. The bottom of the hanging part 112 is provided with a chamfer 114, that is, the chamfer 114 is provided at the position where the hanging part 112 contacts the hanging seat, which improves the matching fault tolerance.

[0199] Example 5

[0200] like Figures 44 to 58 As shown, this embodiment provides a hooking device 100, and the hooking device 100 includes a hooking member 2 and a hooking seat 1, wherein the hooking member 2 is arranged on the battery pack 61, and the hooking seat 1 is arranged on the chassis of the electric vehicle 1000. The hooking member 2 includes a guide portion 21 and a threaded portion 22, and the guide portion 21 is arranged at the top of the threaded portion 22. In the process of connecting the hooking member 2 with the hooking seat 1, the guide portion 21 first extends into the hooking seat 1 to guide the threaded portion 22, and then the threaded portion 22 extends into the locking groove 111 to cooperate with the locking groove 111. In addition, the guiding of the guide portion 21 can facilitate the hooking member 2 to extend out of the hooking seat 1, thereby preventing the hooking member 2 and the hooking seat 1 from being squeezed and damaged, thereby improving the service life of the hooking member 2 and the hooking seat 1.

[0201] The hanging seat 1 in the fifth embodiment is equivalent to the locking structure in the first embodiment, and the hanging member 2 is equivalent to the lock connection structure in the first embodiment.

[0202] The mounting seat 1 is used to be locked with the mounting member 2 to install the battery pack 61 on the electric vehicle 1000. The mounting seat 1 includes a floating mechanism 11, at least two ends of which can be movably connected to the electric vehicle 1000; the floating mechanism 11 has a locking groove 111, and the locking groove 111 is matched with the threaded portion 22 on the mounting member 2. Specifically, the mounting member 2 is mounted on the mounting seat 1 by rotating. The above method does not require a large gap between the mounting member 2 and the mounting seat 1, so that the mounting member 2 can be stably mounted on the mounting seat 1, thereby improving the stability of the mounting of the battery pack 61. When the battery pack 61 is mounted on the chassis of the electric vehicle 1000, the floating mechanism 11 can be self-adjusted, so that the threaded portion 22 can be matched with the locking groove 111, thereby realizing the mounting of the mounting member 2 on the mounting seat 1. In order to achieve stable connection between the battery pack 61 and the electric vehicle 1000, a plurality of attachments 2 are provided on the battery pack 61, and a floating mechanism 11 corresponding to the attachments 2 is provided on the chassis of the electric vehicle 1000. When each attachment 2 is connected with each floating mechanism 11, each floating mechanism 11 can realize the connection between each attachment 2 and each floating mechanism 11 through self-adjustment, thereby reducing the installation accuracy of each floating mechanism 11. The above-mentioned structural form can reduce the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack 61, and in the process of replacing the battery pack 61, the positioning accuracy requirements can also be reduced, thereby simplifying the production process and improving production efficiency.

[0203] In actual use, in order to make the floating mechanism 11 stably and movably connected to the electric vehicle 1000 , it is preferred that at least two symmetrical ends of the floating mechanism 11 are movably connected to the electric vehicle 1000 .

[0204] In order to realize that at least two ends of the floating mechanism 11 can be movably connected to the electric vehicle 1000, this embodiment can be connected to the electric vehicle 1000 through an elastic member 113. With the above-mentioned structural form, the floating mechanism 11 can be movably connected to the electric vehicle 1000 by using the elastic member 113, so that when the threaded portion 22 is connected to the locking groove 111, energy can be stored by the elastic member 113. When the threaded portion 22 is removed from the locking groove 111, the energy stored in the elastic member 113 can be used to return the floating mechanism 11, and in the process of returning, the elastic member 113 can also provide a buffer for the floating mechanism 11 to prevent the floating mechanism 11 from colliding with the electric vehicle 1000 and affecting the service life of both. The floating mechanism 11 is connected to the electric vehicle 1000 through the elastic member 113, so that the floating mechanism 11 can realize multi-degree-of-freedom activities and improve the range of the floating mechanism 11.

[0205] The elastic member 113 is a spring, which has the characteristics of convenient installation, long service life and low cost. In other embodiments, the elastic member 113 can be a disc spring or the like, and the type of the elastic member 113 is not limited here.

[0206] The floating mechanism 11 comprises a floating body 114, and a plurality of elastic members 113 are respectively connected around the floating body 114. The above-mentioned structural form improves the floating stability of the floating body 114.

[0207] During specific use, two ends of the elastic member 113 are respectively connected to the fixing mechanism 12 and the floating body 114 , and the elastic member 113 can be connected to the electric vehicle 1000 through the fixing mechanism 12 .

[0208] The floating mechanism 11 also has a protrusion 112, which extends outward from the floating body 114, and the locking groove 111 is arranged in the floating body 114 and the protrusion 112. Specifically, by arranging the locking groove 111 in the floating body 114 and the protrusion 112, the depth of the locking groove 111 is increased, and thus when the locking groove 111 cooperates with the threaded portion 22, the connection area between the two is increased, thereby achieving a stable connection between the locking groove 111 and the threaded portion 22. The protrusion 112 extends outward from the floating body 114, so that there is no need to leave a gap between the lower end of the floating mechanism 11 and the fixing mechanism 12 to prevent the protrusion 112 from colliding with the fixing mechanism 12, thereby improving the compactness of the installation structure of the anti-floating mechanism 11.

[0209] The floating mechanism 11 also has a guide hole 115, and the setting position of the guide hole 115 can have several embodiments. In the first embodiment, the guide hole 115 is located at the top of the locking groove 111, which can reduce the interference of the mounting seat 1 on the movement of the threaded portion 22 during the cooperation between the locking groove 111 and the threaded portion 22. During the rotation process, as the threaded portion 22 moves upward, the upper end of the threaded portion 22 can extend from the guide hole 115 to the locking groove 111, thereby preventing the threaded portion 22 and the locking groove 111 from being squeezed and damaged, thereby improving the service life of the threaded portion 22 and the locking groove 111; in the second embodiment, the guide hole 115 is located at the bottom of the locking groove 111, so that the threaded portion 22 can extend from the guide hole 115 into the locking groove 111 and cooperate with the locking groove 111, thereby facilitating the connection between the threaded portion 22 and the locking groove 111; in the third embodiment, the guide holes 115 are provided at the top and bottom of the locking groove 111. Preferably, guide holes 115 are provided at the top and bottom of the locking groove 111. By adopting the above-mentioned method, while facilitating the connection between the threaded portion 22 and the locking groove 111, the interference of the hanging seat 1 on the movement of the threaded portion 22 is reduced, and damage between the threaded portion 22 and the locking groove 111 due to extrusion is prevented, thereby improving the service life of the threaded portion 22 and the locking groove 111.

[0210] The guide hole 115 has a first guide sliding surface 116. With the above structural form, in the first embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111, reducing the resistance of the threaded portion 22 entering the guide hole 115; in the second embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111, reducing the resistance of the threaded portion 22 to extend from the guide hole 115; in the third embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111, and also facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111.

[0211] The mounting base 1 further includes a fixing mechanism 12, in which the floating mechanism 11 is connected in a floating manner, and the fixing mechanism 12 is fixedly connected to the electric vehicle 1000. With the above-mentioned structural form, the floating mechanism 11 is connected in a floating manner to the fixing mechanism 12, and the floating mechanism 11 can be protected by the fixing mechanism 12, thereby reducing damage to the floating mechanism 11 by the outside world and increasing the service life of the floating mechanism 11; furthermore, the floating mechanism 11 is connected to the electric vehicle 1000 through the fixing mechanism 12, thereby increasing the contact area between the mounting base 1 and the electric vehicle 1000 and improving the stability of the connection between the mounting base 1 and the electric vehicle 1000.

[0212] The fixed mechanism 12 has a floating cavity 125, and the floating mechanism 11 is located in the floating cavity 125 and is movably connected to the fixed mechanism 12. With the above structure, the floating mechanism 11 is protected by the fixed mechanism 12, and a movable space is provided for the floating mechanism 11 through the floating cavity 125, so that collision between the fixed mechanism 12 and the floating mechanism 11 is prevented, thereby increasing the service life of both.

[0213] The fixing mechanism 12 has a first through hole 126 at the bottom, which is connected to the floating cavity 125 and is used to avoid the hanging part 2. The above statement can be expressed in another way: that is, the upper end of the hanging part 2 located on the battery pack 61 can first extend into the floating cavity 125 through the first through hole 126 under the action of external force; then the hanging part 2 extending into the floating cavity 125 continues to move into the locking groove 111 to cooperate with the locking groove 111. The above structural form facilitates the hanging part 2 to extend into the floating cavity 125.

[0214] In specific use, the diameter of the first through hole 126 may be larger than the diameter of the guide hole 115 located at the lower end of the floating cavity 125 , so that the guide portion 21 and the threaded portion 22 can be easily inserted.

[0215] The fixing mechanism 12 has a second through hole 124 at the top, and the second through hole 124 is connected to the first through hole 126 through the floating cavity 125, and the second through hole 124 is used to avoid the hanging part 2. The above statement can be expressed in another way: when the threaded portion 22 in the hanging part 2 cooperates with the locking groove 111, the hanging part 2 will move upward, and at this time, the upper end of the hanging part 2 can extend from the hanging seat 1 from the second through hole 124, thereby preventing the hanging part 2 and the hanging seat 1 from being damaged due to extrusion, thereby improving the service life of the hanging part 2 and the hanging seat 1, and the upper end of the hanging part 2 can extend from the hanging seat 1 from the second through hole 124, and the threaded portion 22 can also be fully in contact with the locking groove 111, thereby increasing the connection area between the two, thereby improving the stability of the connection between the hanging part 2 and the hanging seat 1, so that the battery pack 61 can be stably hung on the electric vehicle 1000.

[0216] In specific use, the protrusion 112 can extend out of the limiting plate 123 from the second through hole 124. With the above structure, the gap between the limiting plate 123 and the floating body 114 can be reduced, thereby improving the compactness of the structure of the mounting seat 1. Preferably, the diameter of the second through hole 124 is larger than the diameter of the protrusion 112, so as to prevent the second through hole 124 from affecting the movement of the protrusion 112.

[0217] When the mounting seat 1 is connected with the mounting member 2, the locking groove 111, the first through hole 126 and the second through hole 124 are all penetrated by the mounting member 2. With the above structure, the locking groove 111 and the threaded portion 22 can be stably connected, and the mounting seat 1 and the mounting member 2 can be stably matched.

[0218] The fixing mechanism 12 includes a fixing plate 122, a limiting plate 123 and two connecting plates 121. The two connecting plates 121 are symmetrically arranged at both ends of the fixing plate 122. The limiting plate 123 is connected to the top of the connecting plate 121 and is used to limit the displacement of the floating mechanism 11 in the vertical direction. The fixing plate 122, the connecting plate 121 and the limiting plate 123 enclose a floating cavity 125. The above can also be expressed as: the floating cavity 125 that provides a space for the floating mechanism 11 to move is realized by enclosing the fixing plate 122, the limiting plate 123 and the two connecting plates 121. The above structural form has the characteristics of convenient processing, simple structure and low cost. Among them, the fixing plate 122 is connected to the electric vehicle 1000 by bolts, thereby realizing the connection between the fixing mechanism 12 and the electric vehicle 1000. Since the fixing plate 122 increases the connection area between the mounting seat 1 and the electric vehicle 1000, the stability of the connection can be improved. When the hooking member 2 is inserted into the locking groove 111, the floating body 114 will have a large upward displacement. At this time, the limiting plate 123 can be used to prevent the floating body 114 from having a large upward displacement and causing damage to the elastic member 113, thereby improving the service life of the floating mechanism 11. The limiting plate 123 and the fixing plate 122 can be connected by a connecting plate 121, and the connecting plate 121 can also limit the horizontal displacement of the floating body 114 to prevent the floating body 114 from having a large displacement and causing damage to the elastic member 113. The above-mentioned structural form can provide a movable space for the floating mechanism 11 while preventing the floating body 114 from having an excessive displacement and causing damage to the floating body 114 itself and the elastic member 113, thereby improving the service life of the floating mechanism 11.

[0219] The first through hole 126 is provided on the fixing plate 122. The above structure allows the fixing plate 122 to be connected to the electric vehicle 1000 while the first through hole 126 is provided on the fixing plate 122, which facilitates the hooking member 2 to extend into the locking groove 111 and to cooperate with the locking groove 111. The second through hole 124 is provided on the limiting plate 123. The above structure allows the limiting plate 123 to limit the displacement of the floating mechanism 11 while the second through hole 124 is provided on the limiting plate 123, which facilitates the hooking member 2 to extend out of the locking groove 111, preventing the threaded portion 22 and the limiting plate 123 from being squeezed and damaged, thereby increasing the service life of the threaded portion 22 and the limiting plate 123.

[0220] The fixing plate 122 has a plurality of mounting holes 1221, which are arranged at each corner of the fixing plate 122, and are used to connect the fixing mechanism 12 to the electric vehicle 1000. With the above-mentioned structural form, the fixing plate 122 is connected to the electric vehicle 1000 through the mounting holes 1221, and the plurality of mounting holes 1221 are arranged at each corner of the fixing plate 122, thereby improving the connection stability between the fixing plate 122 and the electric vehicle 1000.

[0221] There are two limit plates 123, and the two limit plates 123 are connected to the two connecting plates 121 respectively. The two limit plates 123 have grooves 1231, and the two grooves 1231 correspond to each other and form a second through hole 124. The above structure reduces the connection accuracy of the limit plates 123 and the connecting plates 121, and ensures the connection reliability of each limit plate 123 and each connecting plate 121. In other embodiments, the number of the limit plate 123 can also be one, and the two ends of the limit plate 123 are connected to the two connecting plates 121 respectively, and the middle of the limit plate 123 is provided with a second through hole 124.

[0222] In specific use, the fixed plate 122, the connecting plate 121 and the limiting plate 123 are all plate-like structures, and the fixing mechanism 12 can be processed by a bending process. The fixed plate 122, the connecting plate 121 and the limiting plate 123 after the bending process are integrally formed, which has the characteristics of convenient processing, material saving and low use cost. Of course, the fixed plate 122, the connecting plate 121 and the limiting plate 123 can also be set separately, and the fixed plate 122, the connecting plate 121 and the limiting plate 123 are connected and enclosed into the floating mechanism 11 by welding or other methods.

[0223] The connecting plate 121 has a connecting hole 1211, and the elastic member 113 is connected to the connecting hole 1211. The above structure is adopted, and the elastic member 113 is connected through the connecting hole 1211, which has the characteristics of simple connection and convenient installation. In addition, the connecting hole 1211 is opened on the connecting plate 121, so that there are gaps between the floating body 114 and the fixed plate 122 and the limiting plate 123, so as to prevent the floating body 114 from colliding with the fixed plate 122 and the limiting plate 123, thereby improving the service life of the floating body 114, the fixed plate 122 and the limiting plate 123. The size of the gap between the floating body 114 and the fixed plate 122, and between the floating body 114 and the limiting plate 123 can be adjusted by adjusting the height of the connecting hole 1211.

[0224] The hanging member 2 has an external thread, and the locking groove 111 has an internal thread, and the external thread is connected to the internal thread, so that the battery pack 61 is connected to the floating mechanism 11. With the above structure, the threaded connection has the characteristics of high connection repeatability, simple structure, convenient connection and low cost.

[0225] The top of the guide portion 21 has a second guide sliding surface 211, which facilitates the guide portion 21 to extend into or out of the mounting seat 1, and reduces the resistance between the guide portion 21 and the mounting seat 1. Specifically, the guide portion 21 is truncated cone-shaped, and the second guide sliding surface 211 is arranged on the side wall of the truncated cone.

[0226] The guide portion 21 and the threaded portion 22 are integrally formed, and have the characteristics of simple structure and easy processing. The threaded portion 22 can move up to the locking groove 111 following the guide portion 21, and then the threaded portion 22 and the locking groove 111 can be matched by external force, which has the characteristic of easy operation.

[0227] The guide portion 21 and the threaded portion 22 are separately arranged, so that if one of the guide portion 21 and the threaded portion 22 is damaged, only the damaged guide portion 21 and the threaded portion 22 need to be replaced for normal use, thereby reducing the use cost.

[0228] Taking the integral molding of the guide portion 21 and the threaded portion 22 as an example, the process of hanging the battery pack 61 on the electric vehicle 1000 is described. The fixing plate 122 is provided with a first through hole 126, the limiting plate 123 is provided with a second through hole 124, and the upper and lower ends of the locking groove 111 are both provided with guide holes 115. When the battery pack 61 is hung, the guide portion 21 and the threaded portion 22 will move upward under the action of external force. Since the guide portion 21 is located at the upper end of the threaded portion 22, the guide portion 21 enters the hanging seat 1 first during the hanging process. That is, under the action of the guide portion 21, the axis of the first through hole 126 and the guide hole 115 located at the lower end of the locking groove 111 coincide. At this time, the guide portion 21 sequentially passes through the first through hole 126 and the guide hole 115 at the lower end of the locking groove 111 to enter the locking groove 111, and driven by the guide portion 21, the threaded portion 22 also sequentially passes through the first through hole 126 and the guide hole 115 at the lower end of the locking groove 111 to enter the locking groove 111. In order to make the threaded portion 22 and the locking groove 111 fully cooperate, the hanging member 2 rotates under the action of external force, so that the threaded portion 22 cooperates with the locking groove 111, and the guide portion 21 and the threaded portion 22 continue to move upward. At this time, under the action of the guide portion 21, the second through hole 124 and the guide hole 115 located on the locking groove 111 coincide on the axis, so the guide portion 21 can sequentially extend out of the hanging seat 1 through the guide hole 115 and the second through hole 124 located at the upper end of the locking groove 111. Driven by the guide portion 21, part of the threaded portion 22 may extend out of the hanging seat 1. The above method can achieve a stable connection between the threaded portion 22 and the locking groove 111.

[0229] By adopting the technical solution in the above embodiment, the height space under the vehicle body beam is fully utilized. When the battery swapping equipment disassembles the quick-swap battery pack, the unloaded battery swapping equipment can directly enter the space below the quick-swap battery pack without interfering with the bottom of the electric vehicle; when the battery swapping equipment installs the quick-swap battery pack, the battery swapping equipment carrying the quick-swap battery pack can also directly enter the bottom of the vehicle body beam for battery swapping without interfering with the bottom of the electric vehicle. During the whole process, there is no need to lift the vehicle body, set up a sunken space or dig a pit for the battery swapping equipment to enter and exit, which reduces the cost, time and difficulty of building a battery swapping station, reduces the requirements for the site of the station, and improves the efficiency of battery swapping.

[0230] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An electric vehicle, characterized in that: The electric vehicle comprises: Two vehicle body beams spaced apart in a vehicle width direction, both of which extend in a vehicle length direction; A plurality of locking structures connected to the vehicle body beam; A quick-change battery pack, wherein the quick-change battery pack has a plurality of lock connection structures, and the lock connection structures are connected to the locking structures in a vertical direction so as to lock and connect the quick-change battery pack to the vehicle body beam; The electric vehicle further comprises a battery tray, the battery tray is connected to the vehicle body beam, and a plurality of the lock connection structures are locked and connected to the battery tray; The battery tray includes a tray body, which is fixedly connected to the bottom of the vehicle body beam and / or the side wall of the vehicle body beam, or the battery tray includes two tray bodies, which are respectively fixedly connected to the opposite sides of two vehicle body beams; The tray body includes an outer frame, and a plurality of locking structures are arranged on the outer frame and are respectively connected to a plurality of lock connection structures on the edge of the quick-change battery pack; The locking structure is connected to the outer frame via a mounting seat; The locking structure comprises a locking seat, and the locking seat is provided with an opening for the lock connection structure to enter upwards along the height direction of the vehicle, and the opening is directed downwards.

2. The electric vehicle according to claim 1, characterized in that: The quick-change battery pack is located below the vehicle body beam; And / or, the locking structure includes a locking seat, the locking seat has an opening extending in a vertical direction, a first threaded portion or a limiting portion is provided in the opening, and the locking connection structure has a matching second threaded portion or a stop portion.

3. The electric vehicle according to claim 1, characterized in that: The battery tray is connected to the bottom of the vehicle body beam and / or the side of the vehicle body beam; And / or, the tray body further comprises a reinforcing rod, the reinforcing rod is connected to the outer frame, and a plurality of the locking structures are arranged on the reinforcing rod and are respectively connected to a plurality of the lock connection structures in the middle area of ​​the quick-change battery pack; And / or, a battery-end electrical connector is provided at the front end of the quick-change battery pack, and a vehicle-end electrical connector is provided at the front end of the battery tray, and the battery-end electrical connector is vertically connected to the vehicle-end electrical connector.

4. The electric vehicle according to claim 3, characterized in that: At least part of the battery tray is located on the side of the vehicle body beam, and the locking structure is provided at the bottom of the battery tray; and / or, the height of the locking structure located on the outer frame is less than the height of the locking structure located on the reinforcing rod; And / or, the front end of the quick-change battery pack is also provided with a battery-end liquid cooling connector, and the front end of the battery tray is also provided with a vehicle-end liquid cooling connector, and the battery-end liquid cooling connector is vertically connected to the vehicle-end liquid cooling connector.

5. The electric vehicle according to claim 1, characterized in that: The locking structure includes a locking seat, which has an opening groove extending in the vertical direction and a locking groove extending in the horizontal direction. The lock connection structure is a locking shaft, and the locking groove is used for the locking shaft to be inserted and locked. The top of the opening groove is connected to the locking groove, and the locking shaft enters the locking groove when it reaches the intersection of the opening groove and the locking groove from the bottom of the opening groove in the vertical direction.

6. The electric vehicle according to claim 5, characterized in that: At least part of the locking seat is provided with a locking tongue, which is movably installed in the locking groove and can prevent the locking shaft from escaping from the locking groove.

7. The electric vehicle according to claim 6, characterized in that: The locking structure also includes a locking link, which is movably connected to the locking seat through the locking tongue.

8. The electric vehicle according to claim 1, characterized in that: The quick-change battery pack includes a battery pack case, battery cells and a case cover. The battery pack case is provided with a plurality of battery cell accommodating cavities for placing battery cells. The top of the battery cell accommodating cavity has an opening. The case cover is connected to the battery pack case and is used to cover the opening of the battery cell accommodating cavity. A plurality of lock connection structures are respectively connected to the battery pack case and the case cover.

9. The electric vehicle according to claim 8, characterized in that: The battery pack box includes a frame, a bottom plate and a plurality of mounting bases, the bottom plate is connected to the bottom of the frame and forms a plurality of battery cell accommodating cavities, the box cover is connected to the frame, the mounting bases are respectively connected to at least two ends of the battery pack box, and a plurality of the lock connection structures are respectively connected to the mounting bases; And / or, a seal is provided between the lock connection structure and the box cover.

10. The electric vehicle according to claim 9, characterized in that: A reinforcing beam is provided in the frame, and the lock connection structure passes through the box cover and is connected to the reinforcing beam.

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