Bottom underpinning electric connector protection device and automobile

Abstract

The invention belongs to the technical field of new energy automobiles, and discloses a protection device for a bottom bracket electric connector and an automobile. The bottom support electricity conversion connector protection device comprises a shielding unit and an elastic piece, the shielding unit comprises a shielding plate and a rotating support, the rotating support is fixedly connected with the shielding plate, and the rotating support is rotationally connected to a bottom support body, so that the shielding plate at least has a shielding state for shielding an electricity conversion connector body and an avoiding state for avoiding the electricity conversion connector body; a first contact part is arranged at the top of the rotating support, when the shielding plate is in the shielding state, the projection of the first contact part and the projection of the rotating center of the rotating support on the horizontal plane are staggered, and the elastic piece is configured to keep the rotating support in the shielding state. The protection device for the bottom bracket electricity conversion connector can always shield and protect the electricity conversion connector body when a battery pack is replaced, so that the use reliability and safety of the electricity conversion connector body are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and particularly relates to a protection device for a bottom-mounted battery swapping connector and a vehicle. Background Art

[0002] Electric vehicles have developed rapidly due to energy conservation and environmental protection. At the same time, the driving range restricts their popularization. In the context that no higher energy density materials have been found for power batteries currently, increasing the driving range of electric vehicles mainly relies on increasing the number of power batteries. However, the more power batteries are included in a power battery pack, the heavier the weight of the power battery pack. Currently, the weight of the power battery packs on new energy commercial vehicles mostly reaches 3000 kg - 5500 kg, which is relatively heavy. At the same time, the power battery pack is usually installed on the battery bottom bracket of the vehicle frame, which is located at the rear side of the vehicle cab. The battery bottom bracket is usually fixed to the vehicle frame by welding or bolts.

[0003] In the prior art, vehicles using battery swapping battery packs need to enter a battery swapping station for battery swapping. Traditional battery swapping stations require the construction of large buildings and houses or canopies for protection and shielding. During the battery swapping process, the battery swapping equipment removes the battery system, and at this time, the battery swapping connector is exposed. When there are strong winds and heavy rains in the external environment, rainwater or dust will fall into the battery swapping connector, resulting in damage to the battery swapping connector and generating safety risks.

[0004] In summary, the prior art solutions have the following defects: During the replacement of the battery pack, it is easy for rainwater or solid objects to enter the battery swapping connector, resulting in damage to the battery swapping connector. In severe cases, it will cause the resistance of the battery swapping connector to be too large, the temperature to rise too high during charging and discharging, and generate safety risks and other problems.

[0005] Therefore, there is an urgent need to provide a new protection device for a bottom-mounted battery swapping connector and a vehicle to solve the above technical problems in the prior art. Summary of the Invention

[0006] The purpose of the present invention is to provide a protection device for a bottom-mounted battery swapping connector, which can always shield and protect the battery swapping connector body during the replacement of the battery pack, thereby improving the use reliability and safety of the battery swapping connector body.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] The protective device for the bottom tray battery swapping connector includes a shielding unit and an elastic member. The shielding unit includes a shielding plate and a rotating bracket. The rotating bracket is fixedly connected with the shielding plate, and the rotating bracket is rotatably connected to the bottom tray body, so that the shielding plate has at least a shielding state for shielding the battery swapping connector body and an avoidance state for avoiding the battery swapping connector body. A first contact portion is provided at the top of the rotating bracket. When the shielding plate is in the shielding state, the first contact portion is arranged in a staggered manner with the projection of the rotation center of the rotating bracket on the horizontal plane. The elastic member is configured to keep the rotating bracket in the shielding state.

[0009] Optionally, two shielding units are provided, and the two shielding units are symmetrically arranged with respect to the battery swapping connector body. When the shielding plate is in the shielding state, the distance between the first contact portion and the center of the battery swapping connector body in the horizontal plane projection is greater than the distance between the rotation center of the rotating bracket and the center of the battery swapping connector body in the horizontal plane projection.

[0010] Optionally, the rotating bracket includes a vertical rod portion and a horizontal rod portion extending in a direction away from the center of the battery swapping connector body. The shielding plate is connected to the horizontal rod portion. The bottom end of the vertical rod portion is rotatably connected to the bottom tray body, and the top end is fixedly connected with the horizontal rod portion. The first contact portion is provided on the horizontal rod portion.

[0011] Optionally, the elastic member is an elastic tension spring, and the elastic tension spring is connected between the two rotating brackets.

[0012] Optionally, the vertical rod portion is inclined so that an acute angle is formed between the horizontal rod portion and the vertical rod portion. A second contact portion is provided at the connection between the horizontal rod portion and the vertical rod portion. When the shielding plate is in an intermediate state between the shielding state and the avoidance state, the second contact portion is arranged at the same height as the first contact portion.

[0013] Optionally, the second contact portion is provided with a rounded corner, a second roller is installed at the center of the rounded corner of the second contact portion, and the diameter of the second roller is greater than the diameter of the rounded corner of the second contact portion.

[0014] Optionally, a rain shielding portion extends outward from one end of the shielding plate away from the center of the battery swapping connector body.

[0015] Optionally, at both ends of the battery swapping connector body, two avoidance grooves are formed in the bottom tray body, and the rain shielding portions can be respectively received in the avoidance grooves in a one-to-one correspondence.

[0016] Optionally, the first contact portion is provided with a first roller, the top end of the first contact portion is rounded, the first roller is installed at the center of the first contact portion, and the diameter of the first roller is greater than the rounded diameter of the first contact portion.

[0017] Another object of the present invention is to provide a car, which includes a battery swap connector body, a base body and a base battery swap connector protection device as described in any of the above schemes, wherein the battery swap connector body and the base battery swap connector protection device are both installed on the base body, and the base battery swap connector protection device is arranged around the outer periphery of the battery swap connector body.

[0018] Beneficial effects:

[0019] The bottom support power-swap connector protection device in the present invention includes a shielding unit and an elastic member. The shielding unit includes a shielding plate and a rotating bracket. The shielding plate is fixed on the rotating bracket, and the rotating bracket is rotatably connected to the bottom support body, so that the shielding plate has a shielding state and an avoidance state. When the battery swap battery pack is installed, the battery swap battery pack can squeeze the first contact portion on the top of the rotating bracket, so that the rotating bracket is subjected to the rotational torque from the first contact portion, thereby rotating around the rotation center, so that the shielding plate is transformed from a shielding state of horizontally shielding the top of the power swap connector body to an avoidance state of vertically avoiding the power swap connector body; similarly, when the battery swap battery pack is removed, the elastic member drives the rotating bracket to remain in the shielding state, thereby rotating back, so that the shielding plate blocks the top of the power swap connector body as the battery swap battery pack rises, preventing rainwater, dust, stones and other debris from entering the power swap connector body after the battery swap battery pack is removed, and can provide continuous protection for the power swap connector body whether it is in use or not, thereby improving the reliability and safety of the power swap connector body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axonometric diagram of the bottom bracket power replacement connector protection device in a shielding state provided by a specific embodiment of the present invention;

[0021] Figure 2 It is an axonometric diagram of the bottom bracket power replacement connector protection device in the avoidance state provided by the specific embodiment of the present invention;

[0022] Figure 3 It is a front view of the shape transformation process of the bottom bracket replacement connector protection device provided by the specific embodiment of the present invention when it is in use.

[0023] In the figure:

[0024] 10. Power-swap connector body; 100. Bottom bracket body; 101. Avoidance groove; 102. Anti-collision pad;

[0025] 200. Occluding unit; 201. Elastic member; 210. Rotating bracket; 211. Vertical rod portion; 212. Horizontal rod portion; 220. Occluding plate; 221. Rain shielding portion; 230. First contact portion; 231. First roller; 232. Second roller. Detailed implementation manner

[0026] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0027] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0029] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Please refer to Figures 1 to 3, in this embodiment, the protection device for the bottom support battery swapping connector includes a shielding unit 200 and an elastic member 201. The shielding unit 200 includes a shielding plate 220 and a rotating bracket 210. The rotating bracket 210 is fixedly connected to the shielding plate 220, and the rotating bracket 210 is rotatably connected to the bottom support body 100, so that the shielding plate 220 has at least a shielding state for shielding the battery swapping connector body 10 and an avoidance state for avoiding the battery swapping connector body 10. A first contact portion 230 is provided at the top of the rotating bracket 210. When the shielding plate 220 is in the shielding state, the first contact portion 230 is misaligned with the projection of the rotation center of the rotating bracket 210 on the horizontal plane. The elastic member 201 is configured to keep the rotating bracket 210 in the shielding state.

[0031] The protection device for the bottom support battery swapping connector in this embodiment includes a shielding unit 200 and an elastic member 201. The shielding unit 200 includes a shielding plate 220 and a rotating bracket 210. The shielding plate 220 is fixed to the rotating bracket 210. The rotating bracket 210 is rotatably connected to the bottom support body 100, so that the shielding plate 220 has a shielding state and an avoidance state. When installing the battery swapping battery pack, the battery swapping battery pack can squeeze the first contact portion 230 at the top of the rotating bracket 210, so that the rotating bracket 210 is subjected to the action of the rotational torque from the first contact portion 230, and thus rotates around the rotation center, causing the shielding plate 220 to change from the shielding state of horizontally shielding the top of the battery swapping connector body 10 to the avoidance state of vertically avoiding the battery swapping connector body 10. Similarly, when disassembling the battery swapping battery pack, the elastic member 201 drives the rotating bracket 210 to remain in the shielding state, and thus rotates back, so that the shielding plate 220 shields the top of the battery swapping connector body 10 as the battery swapping battery pack rises, preventing sundries such as rainwater, dust, and stones from entering the battery swapping connector body 10 after the battery swapping battery pack is disassembled, and providing continuous protection for the battery swapping connector body 10 whether it is in the use state or the unused state, thereby improving the use reliability and safety of the battery swapping connector body 10.

[0032] Furthermore, the bottom support power swap connector protection device is provided with two shielding units 200, and the two shielding units 200 are symmetrically arranged with respect to the power swap connector body 10. When the shielding plate 220 is in a shielding state, the distance between the first contact portion 230 and the center of the power swap connector body 10 in the horizontal plane projection is greater than the distance between the rotation center of the rotating bracket 210 and the center of the power swap connector body 10 in the horizontal plane projection. The bottom support power swap connector protection device in this embodiment includes two shielding units 200, and the two shielding units 200 are symmetrically arranged about the center of the power swap connector body 10. The shielding unit 200 includes a rotating bracket 210 rotatably connected to the bottom support body 100, and a shielding plate 220 is installed between the two rotating brackets 210. The distance between the first contact portion 230 and the center of the power swap connector body 10 in the horizontal plane projection is greater than the distance between the rotation center of the rotating bracket 210 and the center of the power swap connector body 10 in the horizontal plane projection. When the battery swap battery pack is installed, the battery swap battery pack can squeeze the first contact portion 230, so that the rotating bracket 210 is subjected to the rotational torque from the first contact portion 230, thereby rotating around the rotation center, so that the shielding plate 220 is transformed from a shielding state of horizontally shielding the top of the power swap connector body 10 to an avoidance state of vertically shielding the side of the power swap connector body 10.

[0033] As a preferred embodiment, the above-mentioned rotating bracket 210 includes a vertical rod portion 211 and a horizontal rod portion 212, the above-mentioned shielding plate is connected to the horizontal rod portion 212, the bottom end of the above-mentioned vertical rod portion 211 is rotatably connected to the bottom support body 100, and the top end is fixedly connected with the above-mentioned horizontal rod portion 212, and the above-mentioned horizontal rod portion 212 is extended in the direction away from the center of the above-mentioned power exchange connector body 10; the above-mentioned driving mechanism is arranged between the two above-mentioned shielding units 200, and can drive the two above-mentioned shielding plates 220 to approach each other, so that the above-mentioned shielding plates 220 have at least two shielding states of a shielding state and an avoidance state; a first contact portion 230 is arranged above the above-mentioned horizontal rod portion 212. The above-mentioned baffle plate 220 is installed by the cross bar part 212, and the cross bar part 212 is protrudingly provided with a first contact part 230. When the battery swap battery pack applies pressure to the first contact part 230, it rotates, which can prevent rainwater, dust, stones and other debris from entering into the power swap connector body 10 after the battery swap battery pack is disassembled, and can provide continuous protection for the power swap connector body 10 whether it is in use or not, thereby improving the reliability and safety of the power swap connector body 10.

[0034] Specifically, in this embodiment, the elastic member 201 is an elastic tension spring, and the elastic tension spring can provide a pulling force for the two shielding units 200. The elastic tension spring is specifically a metal spring with an insulating glue layer coated on its outer periphery. It not only has a simple structure and is easy to produce, which can reduce production costs, but also can prevent a short circuit between the elastic tension spring 201 and the battery pack, avoid the occurrence of electric leakage, and improve the use safety.

[0035] As a preferred embodiment, it is characterized in that two of the elastic tension springs are provided. One end of one of the elastic tension springs is respectively arranged at the bottoms of the two vertical rod parts 211 on the same side of the two shielding units 200, and the two ends of the other elastic tension spring are respectively arranged at the bottoms of the two vertical rod parts 211 on the other same side of the two shielding units 200. That is to say, the rotating brackets 210 on the same side are provided with a pulling force by the same elastic tension spring and thus approach each other, so as to ensure that when the two shielding units 200 arranged oppositely approach each other, their forces are consistent, and thus their displacements are also consistent during the approaching and shearing process, ensuring that each shielding unit 200 can operate smoothly and improving the use reliability of the bottom tray battery swapping connector protection device.

[0036] Of course, each rotating bracket 210 can also be connected to the bottom tray body 100 through an elastic tension spring, which can also realize the mutual approach of the two shielding units 200, but the number of elastic tension springs used is more, and the manufacturing cost is also increased, which will not be elaborated here.

[0037] Please continue to refer to Figure 1 , as an alternative embodiment, a rain shielding part 221 is arranged at one end of the shielding plate 220 far away from the center of the battery swapping connector body 10 and extends outwards. The rain shielding part 221 can expand the shielding range of the shielding plate 220, so as to provide better shielding and protection for the battery swapping connector body 10.

[0038] In this embodiment, both the shielding plate 220 and the rain shielding part 221 are made of insulating flexible materials, which can not only achieve a good shielding and protection effect, but also will not damage the outer wall of the battery pack, and will not conduct electricity with the battery pack, ensuring the use safety. Moreover, when there are actual installation position deviations of the shielding units 200 due to production, assembly and other factors, during the process of the battery pack pressing down, the rotating bracket 210 may flip and get stuck or forcibly twist the shielding plate 220. However, the shielding plate 220 made of flexible materials will not have hard contact, collision or rubbing with the battery pack or the battery swapping connector body 10, further ensuring the use safety of the shielding units 200.

[0039] Further, at both ends of the above-mentioned power exchange connector body 10, the above-mentioned base body 100 is provided with two avoidance grooves 101, and the above-mentioned rain shielding part 221 can be correspondingly received in the above-mentioned avoidance grooves 101 one by one. As shown in Fig. 2 and Figure 3 As shown, the setting of the avoidance groove 101 can directly prevent the collision of the shielding plate 220 and the rain shielding part 221 with the floor body. When the shielding plate 220 is in the vertical shielding state, a receiving space is provided for the shielding plate 220 to prevent the collision damage of the shielding plate 220, improving the use reliability and service life of the base power exchange connector protection device.

[0040] As Figure 2 and Figure 3 As shown, as an optional embodiment, the above-mentioned first contact part 230 is provided with a first roller 231. The setting of the first roller 231 can convert the sliding friction between the outer wall of the battery pack and the first contact part 230 into rolling friction during the descent of the battery pack, thereby reducing the frictional force and not damaging the outer wall of the battery pack, ensuring the safety of the battery pack during installation and disassembly.

[0041] Further, the top end of the above-mentioned first contact part 230 is rounded, the above-mentioned first roller 231 is installed at the center of the circle of the above-mentioned first contact part 230, and the diameter of the above-mentioned first roller 231 is greater than the rounded diameter of the above-mentioned first contact part 230. The first contact part 230 arranged in this way will not puncture and damage the battery pack due to its sharp corners, and because the diameter of the first roller 231 is relatively large, it further ensures that the first roller 231 always prevents the power exchange battery pack from contacting the first contact part 230, thereby improving the use safety of the base power exchange connector protection device.

[0042] In this embodiment, the above-mentioned vertical rod part 211 is inclined so that an acute angle is formed between the above-mentioned horizontal rod part 212 and the above-mentioned vertical rod part 211. A second contact part is provided at the connection between the above-mentioned horizontal rod part 212 and the above-mentioned vertical rod part 211. When the shielding plate 220 is in the intermediate state between the shielding state and the avoidance state, the second contact part is arranged at the same height as the above-mentioned first contact part 230. The acute-angle arrangement of the horizontal rod part 212 and the vertical rod part 211 can reduce the torque between the horizontal rod part 212 and the rotation center of the vertical rod part 211 when the gravity of the horizontal rod part 212 is applied to the vertical rod part 211, preventing the rotation bracket 210 from non-artificially changing the shielding state and improving its use reliability.

[0043] Similarly, the second contact part is rounded, the second roller 232 is installed at the center of the circle of the second contact part, and the diameter of the above-mentioned second roller 232 is greater than the rounded diameter of the above-mentioned second contact part. Similar to the setting of the first roller 231, such a setting can further improve the use safety of the base power exchange connector protection device, which will not be elaborated here.

[0044] refer to Figure 3 When the shielding plate 220 changes from the shielding state to the avoiding state, the first roller 231 will first contact the bottom of the battery pack (such as Figure 3 As shown in the figure at the top in the figure), the rotating bracket 210 rotates outward, and as the first roller 231 is lowered and the second roller 232 is raised, the first roller 231 and the second roller 232 will be in a state of being highly consistent, which is the intermediate state (as shown in the figure at the top in the figure). Figure 3 As shown in the middle figure in the figure), as the rotating bracket 210 rotates further, the connection between the horizontal rod portion 212 and the vertical rod portion 211 continues to abut the bottom of the battery pack, and it is in a vertical shielding state (as shown in the figure in the middle). Figure 3 The second roller 232 is provided to enable the battery pack to roll and rub against the connection, thereby reducing friction and preventing the sharp-angled connection from puncturing and damaging the battery pack.

[0045] For further information, please refer to Figure 3 When the cross bar 212 is transformed from a blocking state to an avoiding state, the end of the cross bar 212 away from the vertical bar 211 will collide with the upper surface of the base body 100. In order to prevent damage to the cross bar 212 or the base body 100, anti-collision pads 102 are provided at corresponding positions of the collision point, that is, 4 anti-collision pads 102 are provided, which are located at the 4 corners of the power exchange connector body 10, thereby ensuring the safe use of the cross bar 212 and the base body 100 and improving the service life.

[0046] This embodiment also provides a car, which includes a power-swap connector body 10, a base body 100, and a base power-swap connector protection device as described in any of the above schemes, wherein the power-swap connector body 10 and the base power-swap connector protection device are both installed on the base body 100, and the base power-swap connector protection device is arranged around the outer periphery of the power-swap connector body 10. When the car uses the base power-swap connector protection device of any of the above schemes, the power-swap connector body 10 can be always shielded and protected when the power-swap battery pack is replaced, thereby ensuring the safe and reliable operation of the power-swap connector and improving the safety and service life of the car.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Bottom support power replacement connector protection device, Characterized in that, It includes an occlusion unit (200) and an elastic member (201). The occlusion unit (200) includes a shielding plate (220) and a rotating bracket (210). The rotating bracket (210) is fixedly connected to the shielding plate (220). The rotating bracket (210) is rotatably connected to the bottom support body (100) so that the shielding plate (220) has at least an occlusion state of occluding the power replacement connector body (10) and an avoidance state of avoiding the power replacement connector body (10). A first contact portion (230) is provided at the top of the rotating bracket (210). When the shielding plate (220) is in the occlusion state, the first contact portion (230) is misaligned with the projection of the rotation center of the rotating bracket (210) on the horizontal plane. The elastic member (201) is configured to keep the rotating bracket (210) in the occlusion state.

2. The bottom support power replacement connector protection device according to claim 1, Characterized in that, There are two occlusion units (200), and the two occlusion units (200) are symmetrically arranged with respect to the power replacement connector body (10). When the shielding plate (220) is in the occlusion state, the distance between the first contact portion (230) and the center of the power replacement connector body (10) on the horizontal plane projection is greater than the distance between the rotation center of the rotating bracket (210) and the center of the power replacement connector body (10) on the horizontal plane projection.

3. The bottom support power replacement connector protection device according to claim 1, Characterized in that, The rotating bracket (210) includes a vertical rod portion (211) and a horizontal rod portion (212) extending in a direction away from the center of the power replacement connector body (10). The shielding plate (220) is connected to the horizontal rod portion (212). The bottom end of the vertical rod portion (211) is rotatably connected to the bottom support body (100), and the top end is fixedly connected to the horizontal rod portion (212). The first contact portion (230) is provided on the horizontal rod portion (212).

4. The bottom support power replacement connector protection device according to claim 2, Characterized in that, The elastic member (201) is an elastic tension spring, and the elastic tension spring is connected between the two rotating brackets (210).

5. The bottom support power replacement connector protection device according to claim 3, Characterized in that, The vertical rod portion (211) is inclined so that an acute angle is formed between the horizontal rod portion (212) and the vertical rod portion (211). A second contact portion is provided at the connection between the horizontal rod portion (212) and the vertical rod portion (211). When the shielding plate (220) is in an intermediate state between the occlusion state and the avoidance state, the second contact portion is arranged at the same height as the first contact portion (230).

6. The bottom support power replacement connector protection device according to claim 5, Characterized in that, The second contact part is provided with a rounded corner, the second roller (232) is installed at the center of the second contact part, and the diameter of the second roller (232) is greater than the rounded corner diameter of the second contact part.

7. The bottom support power exchange connector protection device according to claim 2, wherein, One end of the shielding plate (220) away from the center of the power exchange connector body (10) extends outward to be provided with a rain shielding part (221).

8. The bottom support power exchange connector protection device according to claim 7, wherein, At both ends of the power exchange connector body (10), the bottom support body (100) is provided with two avoidance grooves (101), and the rain shielding parts (221) can be respectively accommodated in the avoidance grooves (101).

9. The bottom support power exchange connector protection device according to any one of claims 1-8, wherein, The first contact part (230) is provided with a first roller (231), the top end of the first contact part (230) is provided with a rounded corner, the first roller (231) is installed at the center of the first contact part (230), and the diameter of the first roller (231) is greater than the rounded corner diameter of the first contact part (230).

10. An automobile, wherein, It includes a power exchange connector body (10), a bottom support body (100) and a bottom support power exchange connector protection device according to any one of claims 1-9. The power exchange connector body (10) and the bottom support power exchange connector protection device are both installed on the bottom support body (100), and the bottom support power exchange connector protection device surrounds the outer periphery of the power exchange connector body (10).

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