CN214564571U

CN214564571U - A drainage protection device for battery package goes up and down

Info

Publication number: CN214564571U
Application number: CN202120930843.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuhan Weineng Battery Assets Co ltd
Current assignee: Wuhan Weineng Battery Assets Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-02
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a drainage protection device for lifting a battery pack, which comprises drainage components respectively arranged at the front side and the rear side of the battery pack, wherein the drainage components comprise a first guide plate and a second guide plate which are arranged in parallel and a limiting part respectively connected with the first guide plate and the second guide plate, and the first guide plate and the second guide plate can move relatively; one end of the drainage assembly is rotatably connected with the battery pack, the other end of the drainage assembly is slidably connected with a chassis of the automobile, the drainage assembly is connected with the automobile body through a telescopic mechanism capable of stretching, and the telescopic mechanism can rotate around the automobile body. In this way, the utility model discloses a both sides set up the guide plate around the battery package, and the guide plate plays the wind-guiding and prevents the effect of collision to the battery package to the guide plate can change the gesture along with the lift of battery package.

Description

A drainage protection device for battery package goes up and down

Technical Field

The utility model relates to an electric automobile field especially relates to a drainage protection device for battery package goes up and down.

Background

With the initiation of green travel in all countries of the world, new energy vehicles are more and more popular, and have gradually replaced traditional fuel vehicles. According to the new energy automobile, the battery pack is arranged on the chassis of the automobile to serve as a power source, and when the electric quantity of the battery pack is exhausted or damaged, the battery pack needs to be replaced. Because the volume and the weight of battery package are great, all be provided with on the car and be used for carrying out the device that goes up and down to the battery package, convenience of customers changes the battery package.

The height of the gravity center of the automobile has direct influence on the operation and control performance of the automobile. If the center of gravity of the vehicle is too high, there is a risk of rollover when the vehicle turns, so lowering the center of gravity of the vehicle is an important means for improving the maneuverability and anti-roll performance of the vehicle. The battery pack is heavy in weight, and the height of the battery pack can be adjusted to achieve a good effect of adjusting the gravity center of the automobile. However, when the battery pack is adjusted downwards, the battery pack exceeds the chassis of the automobile, the exceeding part can bring large wind resistance to the automobile, and the part of the battery pack is easy to collide with foreign matters on the ground, so that the battery pack is burnt and even explodes. At present, for the electric automobile adopting the liftable battery pack, a device for guiding air and preventing collision of the battery pack is not arranged.

The prior art provides a battery pack for electric automobile, including the battery pack body, the surface cover of battery pack body is equipped with the protective housing, the right side fixedly connected with slide bar of protective housing inner wall, the surface sliding connection of slide bar has trapezoidal plate, the front side fixedly connected with fixed plate of trapezoidal plate, the surface sliding connection of trapezoidal plate has the swash plate, the left side fixedly connected with sliding sleeve of swash plate, the inner wall sliding connection of sliding sleeve has the slide bar, the top and the bottom of slide bar all with the inner wall fixed connection of protective housing, the left side fixedly connected with lifter plate of sliding sleeve, the left side of lifter plate and the inner wall sliding connection of protective housing, the inboard fixedly connected with extension spring of lifter plate, the outside fixedly connected with post of lifter plate, the outside of post is provided with the picture peg, the slot that uses with the post cooperation is seted up on the surface of picture peg, the back of picture peg runs through and extends to the outside and the battery pack body fixed connection of protective housing. The technology only aims at the battery pack which cannot be lifted, does not have the function of air guiding, and cannot well prevent the battery pack from being impacted by covering the protective layer on the outer side of the battery pack.

Therefore, it is necessary to design a drainage protection device for battery pack lifting, which has a simple structure, plays a role in guiding wind and preventing collision for a liftable battery pack, and can be changed along with the lifting of the battery pack.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem, the utility model provides a drainage protection device for battery package goes up and down sets up the guide plate through both sides around the battery package, and the guide plate plays the wind-guiding and prevents the effect of collision to the battery package to the guide plate can change the gesture along with the lift of battery package, thereby when the battery package goes up and down to the optional position, can both play the wind-guiding and prevent the effect of collision.

In order to achieve the above object, the utility model adopts the following technical scheme:

a drainage protection device for lifting a battery pack comprises drainage components which are respectively arranged on the front side and the rear side of the battery pack, wherein each drainage component comprises a first guide plate and a second guide plate which are arranged in parallel, and limiting parts which are respectively connected with the first guide plate and the second guide plate, and the first guide plate and the second guide plate can move relatively; one end of the drainage assembly is rotatably connected with the battery pack, the other end of the drainage assembly is slidably connected with a chassis of the automobile, the drainage assembly is connected with the automobile body through a telescopic mechanism capable of stretching, and the telescopic mechanism can rotate around the automobile body.

Furthermore, a first through groove and a second through groove which are parallel to each other are arranged on the limiting piece; the cross section of the first through groove is the same as that of the first guide plate, and the cross section of the second through groove is the same as that of the second guide plate; the first guide plate is connected with the first through groove in a sliding mode, and the second guide plate is connected with the second through groove in a sliding mode.

Furthermore, the left side wall and the right side wall of the first through groove and the second through groove are provided with limiting holes for containing the elastic protruding structures.

Furthermore, telescopic machanism include with chassis articulated connecting axle, with the connecting axle keep away from the extensible member that the one end of chassis is connected.

Furthermore, the extensible member includes one end all with two expanding spring of connecting axle, two expanding spring's the other end respectively symmetric connection in the left and right sides of locating part.

Further, the bottom ends of the front side and the rear side of the battery pack are symmetrically provided with lug plates, and first through holes are formed in the lug plates; the one end that is close to the battery package of first guide plate is provided with and runs through the second perforation of first guide plate, the second is perforated to follow the width direction setting of first guide plate, it has the axis of rotation to hold in the second perforation, the both ends of axis of rotation pass two respectively first perforation, and with otic placode fixed connection.

Furthermore, one side, close to the chassis, of the second guide plate is connected with a sliding block, a sliding groove used for containing the sliding block is formed in the bottom end of the chassis, and the sliding groove is of a T-shaped structure and is arranged along the length direction of the vehicle body.

Further, the limiting part comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod; the first link has a first end rotatably connected to the rear end of the right side of the first baffle and a second end rotatably connected to the rear end of the right side of the second baffle, the second link has a first end rotatably connected to the front end of the right side of the first baffle and a second end rotatably connected to the front end of the right side of the second baffle, the third link has a first end rotatably connected to the rear end of the left side of the first baffle and a second end rotatably connected to the rear end of the left side of the second baffle, and the fourth link has a first end rotatably connected to the front end of the left side of the first baffle and a second end rotatably connected to the front end of the left side of the second baffle; the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are arranged in parallel, so that the left side and the right side of the first guide plate and the second guide plate form a parallelogram connecting rod mechanism; one end of the telescopic mechanism is hinged with the vehicle body, and the other end of the telescopic mechanism is connected with the upper end face of the first guide plate.

Further, buffer layers are arranged on the outer plate surfaces of the first guide plate and the second guide plate, and are made of EVA rubber plastic materials or EPE materials; the outer plate surfaces of the first guide plate and the second guide plate are both provided with air guide grooves, and the air guide grooves are arranged along the length direction of the plate surfaces.

Further, the second flow guide plate positioned on the front side of the vehicle body inclines towards the front side of the vehicle body; the second air deflector positioned at the rear side of the vehicle body inclines towards the rear side of the vehicle body.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a drainage protection device for battery package goes up and down sets up two sets of guide plates through both sides around the battery package, and the guide plate plays the wind-guiding and prevents the effect of collision to the battery package. Each group of guide plates are connected with the vehicle body through a telescopic mechanism and comprise two guide plates which are arranged in parallel, and the two guide plates can move relatively. The guide plate that is close to the battery package rotates with the battery package to be connected, the guide plate and the chassis sliding connection that are close to the chassis to pass through the connecting piece with the guide plate and connect and make the two also keep parallel when the action, thereby can change the gesture along with the lift of battery package, so that when the battery package goes up and down to optional position, can both play wind-guiding and collision prevention's effect.

2. The utility model discloses a drainage protection device for battery pack lifting, through being provided with the wind-guiding groove or other structures that can play a guiding role to the gas flow direction on the outer plate surface of the guide plate, the guide plate plays a better role in guiding the air flow; and be provided with the buffer layer on the outer face of guide plate, the buffer layer adopts the buffering material that cars were commonly used such as EVA rubber and plastic material or EPE material, can slow down the impact effectively, protects the guide plate.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is an enlarged partial schematic view of area A of FIG. 1;

fig. 3 is a schematic structural view of a second baffle according to embodiment 1 of the present invention;

fig. 4 is a schematic structural view of the battery pack according to embodiment 1 of the present invention after being lowered;

fig. 5 is a schematic right-view structural diagram of embodiment 2 of the present invention;

fig. 6 is a left side view schematic structure of embodiment 2 of the present invention;

the parts in the drawings are numbered as follows: 110. a battery pack; 111. an ear plate; 120. a drainage assembly; 121. a first baffle; 1211. a rotating shaft; 122. a second baffle; 1221. a slider; 1222. an elastic bulge; 1223. a wind guide groove; 1224. a buffer layer; 130. a telescoping mechanism; 131. a connecting shaft; 132. a tension spring; 140. a chute; 150. a limiting member; 1501. a limiting hole; 161. a first link; 162. a second link; 163. a third link; 164. and a fourth link.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 2, a drainage protection device for lifting a battery pack 110 includes drainage assemblies 120 respectively disposed on front and rear sides of the battery pack 110, and the drainage assemblies 120 include a first guide plate 121 and a second guide plate 122 disposed in parallel with each other, and a limiting member 150 respectively connected to the first guide plate 121 and the second guide plate 122. The limiting member 150 can ensure that the first guide plate 121 and the second guide plate 122 are still parallel during operation. The first guide plate 121 and the second guide plate 122 can move relatively to adjust the posture according to the movement of the battery pack 110. One end of the drainage component 120 is rotatably connected with the battery pack 110, the other end of the drainage component is connected with a chassis of an automobile in a sliding mode, the drainage component 120 is connected with an automobile body through a telescopic mechanism 130 capable of stretching out and drawing back, the telescopic mechanism 130 can rotate around the automobile body, so that the drainage component 120 can be respectively connected with the automobile body and the battery pack 110 at a certain angle when the battery pack 110 is lifted to any height, and the real-time protection effect is achieved.

So set up, through both sides set up two sets of drainage subassembly 120 around battery package 110, two sets of drainage subassemblies 120 play wind-guiding and collision prevention's effect to battery package 110. Each group of drainage assemblies 120 is connected with the vehicle body through a telescopic mechanism 130, and comprises a first guide plate 121 and a second guide plate 122 which are arranged in parallel, and the first guide plate 121 and the second guide plate 122 can move relatively. First guide plate 121 and battery package 110 that is close to battery package 110 rotate to be connected, second guide plate 122 and chassis sliding connection that are close to the chassis to be connected first guide plate 121 and second guide plate 122 and make the two also keep parallel when the action through the connecting piece, make drainage subassembly 120 can change the gesture along with battery package 110's lift, so that when battery package 110 goes up and down to optional position, drainage subassembly 120 can both play the wind-guiding and prevent the effect of collision.

As shown in fig. 2, in some embodiments, the position-limiting member 150 is disposed in a square structure and has a first through groove and a second through groove parallel to each other. The cross section of the first through groove is the same as that of the first guide plate 121, so that the first guide plate 121 and the first through groove are in transition fit, no gap exists between the first guide plate 121 and the first through groove, and the first guide plate 121 is prevented from deflecting in the first through groove. The cross section of the second through groove is the same as the cross section of the second baffle 122, so that the second baffle 122 and the second through groove are in transition fit without a gap therebetween, and the second baffle 122 is prevented from deflecting in the second through groove. With such an arrangement, when the first guide plate 121 and the second guide plate 122 move along with the battery pack 110, the parallel state of the first guide plate and the second guide plate can be continuously maintained due to the limiting function of the limiting member 150.

In other embodiments, as shown in fig. 2, the first baffle 121 is slidably connected to the first through-slot and the second baffle 122 is slidably connected to the second through-slot. The left and right sides of the first guide plate 121 and the second guide plate 122 are both provided with elastic protrusions 1222 structure, and the left and right side walls of the first penetrating groove and the second penetrating groove are both provided with limiting holes 1501 for accommodating the elastic protrusions 1222 structure. With such an arrangement, when the battery pack 110 moves up and down, the elastic protrusion 1222 is forced to be away from the position-limiting hole 1501, and the first guide plate 121 and the second guide plate 122 slide relatively in the respective through grooves along with the movement of the battery pack 110, so as to change the overall length of the drainage assembly 120 according to the lifting position of the battery pack 110. When the battery pack 110 stops moving, the elastic protrusion 1222 structure falls into the limiting hole 1501, and the flow guide plate and the through groove are relatively fixed.

As shown in fig. 2, in some embodiments, the telescopic mechanism 130 includes a connecting shaft 131 hinged to the chassis, and a telescopic member connected to an end of the connecting shaft 131 far from the chassis. The connection shaft 131 is hinged to the chassis to ensure that the telescopic mechanism 130 can rotate freely around the vehicle body, so as to ensure that the drainage assembly 120 connected with the telescopic mechanism 130 can change to a proper posture along with the action of the battery pack 110. The telescopic member includes two telescopic springs 132 having one end connected to the connecting shaft 131, and the other ends of the two telescopic springs 132 are respectively and symmetrically connected to the left and right sides of the limiting member 150. Two springs are symmetrically arranged on two sides of the connecting piece, so that the stability of the drainage assembly 120 can be ensured, and the left and right inclination of the guide plate is prevented. The telescopic member may be a telescopic spring 132, a telescopic rod, or a crank block 1221 mechanism, and it should be noted that the telescopic member may also be another mechanism having a telescopic function, and is not limited thereto.

As shown in fig. 2, in some embodiments, the bottom ends of the front and rear sides of the battery pack 110 are symmetrically provided with the ear plates 111, and the ear plates 111 are provided with first through holes. One end of the first flow guide plate 121 close to the battery pack 110 is provided with a second through hole penetrating through the first flow guide plate 121, and the second through hole is arranged along the width direction of the first flow guide plate 121. The second through hole accommodates a rotation shaft 1211, and both ends of the rotation shaft 1211 respectively pass through the two first through holes and are fixedly connected to the ear plate 111, thereby rotatably connecting the first guide plate 121 to the battery pack 110. With this arrangement, when the battery pack 110 moves up and down, the battery pack 110 drives the first air deflector 121 to move through the rotation shaft 1211, so that the first air deflector 121 rotates around the rotation shaft 1211, and the air guiding assembly 120 adjusts the posture according to the movement of the battery pack 110.

As shown in fig. 2 to 3, in some embodiments, a slider 1221 is attached to a side of the second spoiler 122 close to the chassis, and the slider 1221 is fixed to a center line of the second spoiler 122 in the vehicle body direction. The bottom on chassis is provided with the spout 140 that is used for holding slider 1221, and spout 140 is T type structure to set up along the length direction of automobile body, the spout 140 that is T type structure setting can play the supporting role to slider 1221, makes second guide plate 122 and chassis be connected relatively. With such an arrangement, when the first air guiding plate 121 rotates, the first air guiding plate 121 slides relative to the limiting member 150, and drives the second air guiding plate 122 to slide through the limiting member 150, and the second air guiding plate 122 slides back and forth relative to the chassis through the sliding block 1221, so as to ensure that the first air guiding plate 121 and the second air guiding plate 122 keep parallel to each other.

As shown in fig. 2 to 3, in some embodiments, the second baffle 122 located on the front side of the vehicle body is inclined toward the front side of the vehicle body; the second air deflector 122 located at the rear side of the vehicle body is inclined toward the rear side of the vehicle body to ensure that the air flow flows downward along the air deflector, thereby reducing the resistance on the vehicle body.

Specifically, the outer plate surfaces of the first baffle 121 and the second baffle 122 are both provided with a buffer layer 1224. The buffer layer 1224 is made of EVA rubber and plastic or EPE, which is a commonly used buffer material for automobiles, and can effectively reduce impact and protect the deflector. The outer plate surfaces of the first guide plate 121 and the second guide plate 122 are provided with air guide grooves 1223 along the length direction of the plate surfaces, so that the guide plates have a better airflow guiding effect, and the wind resistance is reduced. According to the technical solution of the present invention, as the skilled in the art understands, the air guiding groove 1223 for optimizing the air flow direction in the present invention can be adjusted as required, for example, the air guiding groove 1223 is set to rotate the fan blade connected to the second air guiding plate 122, or set to be a duct structure, or other structures capable of guiding the air flow direction, so that the above equivalent structure can be understood as an equivalent embodiment using the solution of the present invention.

As shown in fig. 4 and referring to fig. 1, in the present embodiment, when the driver controls the battery pack 110 to descend by the battery pack 110 elevating mechanism, the first deflector 121 rotates toward the inside of the vehicle body about the rotating shaft 1211 and slides toward the inside of the vehicle body with respect to the stopper 150. The first deflector 121 drives the limiting member 150 to rotate downward, so that the extension spring 132 is extended, and the connecting shaft 131 rotates toward the inside of the vehicle body. Meanwhile, the limiting member 150 drives the second air deflector 122 to rotate, and the second air deflector 122 keeps parallel to the first air deflector 121 when rotating, and slides towards the inner side of the vehicle body relative to the limiting member 150, thereby driving the sliding block 1221 to slide towards the inner side of the vehicle body along the sliding groove 140.

Example 2

As shown in the figure, in the embodiment, the limiting member 150 includes a first link 161, a second link 162, a third link 163 and a fourth link 164. The first link 161 has a first end rotatably coupled to the rear end of the right side of the first baffle 121 and a second end rotatably coupled to the rear end of the right side of the second baffle 122. The second link 162 has a first end rotatably coupled to the front end of the right side of the first baffle 121 and a second end rotatably coupled to the front end of the right side of the second baffle 122. Third link 163 has a first end pivotally connected to the rear end of the left side of first baffle 121 and a second end pivotally connected to the rear end of the left side of second baffle 122. The fourth link 164 has a first end pivotally connected to the front end of the left side of the first baffle 121 and a second end pivotally connected to the front end of the left side of the second baffle 122. The first link 161, the second link 162, the third link 163 and the fourth link 164 are disposed in parallel with each other, so that the left and right sides of the first baffle 121 and the second baffle 122 form a parallelogram link mechanism, so that the first baffle 121 and the second baffle 122 realize a linking motion through the parallelogram link mechanism on the left and right sides, and maintain a parallel state with each other during the motion. Specifically, the first link 161, the second link 162, the third link 163 and the fourth link 164 have the same shape and size, and may be set to a suitable size according to the size of the air deflector, the height of the vehicle chassis and the size of the battery pack 110.

In this embodiment, one end of the telescopic mechanism 130 is hinged to the vehicle body, and the other end is connected to the upper end surface of the first deflector 121. The telescopic mechanisms 130 may be respectively connected to the left and right ends of the upper plate surface of the first air deflector 121 or connected to the central position of the upper plate surface of the first air deflector 121.

Other structures of the present embodiment are the same as those of embodiment 1 except for the above structure.

The above description is only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the utility model, or the direct or indirect application in other related technical fields, are included in the patent protection scope of the utility model.

Claims

1. The drainage protection device for lifting of the battery pack (110) is characterized by comprising drainage components (120) which are respectively arranged at the front side and the rear side of the battery pack (110), wherein each drainage component (120) comprises a first guide plate (121) and a second guide plate (122) which are arranged in parallel, and limiting parts (150) respectively connected with the first guide plate (121) and the second guide plate (122), and the first guide plate (121) and the second guide plate (122) can move relatively; one end and the battery package (110) of drainage subassembly (120) are rotated and are connected, the other end and the chassis sliding connection of car, drainage subassembly (120) are connected with the automobile body through telescopic machanism (130) that can stretch out and draw back, telescopic machanism (130) can rotate around the automobile body.

2. The drainage protection device for the lifting of a battery pack (110) according to claim 1, wherein the limiting member (150) is provided with a first through groove and a second through groove which are parallel to each other; the cross section of the first through groove is the same as that of the first guide plate (121), and the cross section of the second through groove is the same as that of the second guide plate (122); the first guide plate (121) is in sliding connection with the first through groove, and the second guide plate (122) is in sliding connection with the second through groove.

3. The drainage protection device for the lifting of the battery pack (110) according to claim 2, wherein the first guide plate (121) and the second guide plate (122) are provided with elastic protrusion (1222) structures on the left and right sides, and the first through groove and the second through groove are provided with limiting holes (1501) on the left and right sides for accommodating the elastic protrusion (1222) structures.

4. The drain protection device for the lifting of a battery pack (110) according to claim 1, wherein the telescopic mechanism (130) comprises a connecting shaft (131) hinged to the chassis and a telescopic member connected to an end of the connecting shaft (131) remote from the chassis.

5. The drainage protection device for the lifting of a battery pack (110) according to claim 4, wherein the telescopic member comprises two telescopic springs (132) each having one end connected to the connecting shaft (131), and the other ends of the two telescopic springs (132) are symmetrically connected to the left and right sides of the limiting member (150), respectively.

6. The drainage protection device for the lifting of the battery pack (110) according to claim 1, wherein the bottom ends of the front side and the rear side of the battery pack (110) are symmetrically provided with ear plates (111), and the ear plates (111) are provided with first through holes; one end, close to the battery pack (110), of the first guide plate (121) is provided with a second through hole penetrating through the first guide plate (121), the second through hole is formed in the width direction of the first guide plate (121), a rotating shaft (1211) is accommodated in the second through hole, and two ends of the rotating shaft (1211) penetrate through the first through holes respectively and are fixedly connected with the lug plate (111).

7. The drainage protection device for the lifting of the battery pack (110) according to claim 1, wherein a sliding block (1221) is connected to one side of the second flow guide plate (122) close to the chassis, a sliding groove (140) for accommodating the sliding block (1221) is arranged at the bottom end of the chassis, and the sliding groove (140) is of a T-shaped structure and is arranged along the length direction of a vehicle body.

8. The drain protection device for the lifting of a battery pack (110) according to claim 1, wherein the limiting member (150) comprises a first connecting rod (161), a second connecting rod (162), a third connecting rod (163) and a fourth connecting rod (164); the first link (161) has a first end rotatably connected to a rear end of a right side of the first baffle (121) and a second end rotatably connected to a rear end of a right side of the second baffle (122), the second link (162) has a first end rotatably connected to a front end of a right side of the first baffle (121) and a second end rotatably connected to a front end of a right side of the second baffle (122), the third link (163) has a first end rotatably connected to the rear end of the left side of the first baffle (121), and a second end rotatably connected to the rear end of the left side of the second baffle (122), the fourth link (164) has a first end pivotally connected to the front end of the left side of the first baffle (121) and a second end pivotally connected to the front end of the left side of the second baffle (122); the first connecting rod (161), the second connecting rod (162), the third connecting rod (163) and the fourth connecting rod (164) are arranged in parallel, so that the left side and the right side of the first guide plate (121) and the second guide plate (122) form a parallelogram connecting rod mechanism; one end of the telescopic mechanism (130) is hinged with the vehicle body, and the other end of the telescopic mechanism is connected with the upper end face of the first guide plate (121).

9. The drainage protection device for the lifting of the battery pack (110) according to any one of claims 1 to 8, wherein the outer plate surfaces of the first diversion plate (121) and the second diversion plate (122) are both provided with a buffer layer (1224), and the buffer layer (1224) is made of EVA rubber plastic material or EPE material; the outer plate surfaces of the first guide plate (121) and the second guide plate (122) are both provided with air guide grooves (1223), and the air guide grooves (1223) are arranged along the length direction of the plate surfaces.

10. The drain protection device for raising and lowering a battery pack (110) according to any one of claims 1 to 8, wherein the second deflector (122) located on the front side of the vehicle body is inclined toward the front side of the vehicle body; the second baffle (122) positioned at the rear side of the vehicle body inclines towards the rear side of the vehicle body.