New energy automobile chassis shock isolation device

Abstract

The invention relates to the field of new energy automobiles, in particular to a new energy automobile chassis shock isolation device. The device comprises a battery rack, and rolling shafts are symmetrically installed on the two sides of the bottom face of the battery rack and used for installing automobile moving wheels. According to the new energy automobile chassis shock insulation device, in the working process of the shock insulation mechanism, movement of a positioning block drives a rack plate to move, then a gear and a fanning plate are driven to rotate, the shock insulation function on a battery rack is achieved, and the influence of shock on a chassis and assemblies is reduced; meanwhile, cold air generated in the running process of the automobile is guided to the downwind pipe of the ventilation mechanism, the ventilation opening of the downwind pipe is in the shape of an inclined plane, the cold air flows in an accelerated mode, and therefore the cooling effect of the battery pack is improved, and the service life of the battery pack is prolonged. And the air quickly enters the battery rack to promote air circulation in the chassis and cool components on the chassis.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to a chassis seismic isolation device for new energy vehicles. Background Art

[0002] With the continuous development of the automobile industry, especially as new energy vehicles gradually become mainstream, the performance requirements for battery racks are becoming increasingly stringent. In complex driving environments, how to achieve efficient seismic isolation, heat dissipation and ventilation functions has become a key factor in improving the overall performance and safety of the vehicle.

[0003] During the driving of new energy vehicles, due to the complex road conditions, especially when encountering uneven roads, the vehicle is very likely to bump. As the core component of new energy vehicles, the battery pack faces the risk of damage during the bump. The traditional new energy vehicle chassis isolation device mainly uses springs and hydraulic rods to achieve the shock absorption function, so as to play a certain degree of isolation effect on the battery pack. For example, the publication number CN208515683U proposes a vehicle chassis isolation device, including an upper shell and a lower shell, between which a first friction pair, a second friction pair, and an isolation pad are arranged from top to bottom, and elastic devices are arranged between the left and right ends of the first friction pair and the second friction pair. The elastic device includes a second friction plate and a third friction plate, and a third long rod and a fourth long rod hinged in an X shape are arranged between the second friction plate and the third friction plate. , two third friction blocks are arranged on the second friction plate, and the two third friction blocks are hinged to one end of the third long rod and the fourth long rod respectively; two fourth friction blocks are arranged on the third friction plate, and the two fourth friction blocks are hinged to the other end of the third long rod and the fourth long rod respectively; a telescopic rod is connected to the hinge of the third long rod and the fourth long rod; a sixth spring is connected between the two third friction blocks, and a seventh spring is connected between the two fourth friction blocks. This design not only has a good shock isolation effect, but also has high reliability. However, when the vehicle travels to a road surface where there are hard objects such as stones, the chassis of the vehicle will generate a strong upward vibration force due to the impact. If this vibration force cannot be effectively eliminated in time, it will continue to be transmitted and act on the battery pack, which is very likely to have a negative impact on the structure and performance of the battery pack, thereby affecting the normal operation and service life of the vehicle;

[0004] Moreover, during the driving of new energy vehicles, a large amount of relatively low-temperature cold air will naturally form around the chassis. However, the traditional new energy vehicle chassis seismic isolation device focuses on reducing the impact of vibration on the chassis and fails to effectively utilize the energy generated during the seismic isolation process. Moreover, due to the lack of reasonable design, the cold air around the chassis is difficult to quickly and efficiently enter the interior of the chassis, making it impossible for these low-temperature cold air to play its due role in cooling the chassis and battery pack, resulting in a waste of resources. In view of this, we propose a new energy vehicle chassis seismic isolation device. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle chassis seismic isolation device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides a new energy vehicle chassis seismic isolation device, comprising a battery rack, rollers are symmetrically installed on both sides of the vehicle chassis of the bottom surface of the battery rack for installing vehicle moving wheels, and a seismic isolation mechanism and a cooling mechanism are respectively installed inside the battery rack, wherein the seismic isolation mechanism is used to isolate the battery rack from seismic shock, and the force generated by the seismic isolation mechanism during movement is transmitted to the cooling mechanism, so that the cooling mechanism is prompted to continuously cool down the components on the battery rack through its own rotation;

[0007] A ventilation mechanism is installed under the battery rack. When the car is running, the cold air generated by the movement is guided to the ventilation mechanism to promote the circulation of air inside the battery rack. At the same time, the force generated by the seismic isolation mechanism during the movement of the vehicle is also used to drive the ventilation mechanism to clean itself.

[0008] The ventilation opening of the ventilation mechanism is in an inclined shape, which accelerates the flow of cold air, so that the cold air quickly enters the battery rack and is transmitted to the components on the battery rack.

[0009] As a further improvement of the technical solution, a heat dissipation ventilation plate is slidably connected to the top of the battery rack, and a battery pack is fixedly installed on the top of the heat dissipation ventilation plate to provide a power source for the new energy vehicle.

[0010] As a further improvement of the technical solution, the seismic isolation mechanism includes a fixed block fixedly connected to the inner top wall of the battery rack, and both ends of the fixed block are rotatably connected to initial buffer rods.

[0011] As a further improvement of the technical solution, one end of the initial buffer rod is movably connected to a secondary buffer rod, and the shell of the secondary buffer rod is fixedly connected to the bottom of the inner cavity of the battery rack.

[0012] As a further improvement of the present technical solution, the cooling mechanism includes a rack plate fixedly connected to one side of the secondary buffer rod, a gear is meshedly connected to the outer edge of the rack plate, and a stabilizing bracket is slidably connected to one side of the rack plate, and the top surface of the stabilizing bracket is also connected to the inner bottom wall of the battery rack.

[0013] As a further improvement of the technical solution, one end of the gear is fixedly connected to a fan plate, and one end of the fan plate is rotatably connected to the inner wall of the battery rack. The rotation of the fan plate itself forms an airflow to cool the battery pack.

[0014] As a further improvement of the present technical solution, the ventilation mechanism includes a movable block fixedly connected to the bottom surface of the secondary buffer rod and a downwind duct connected to the bottom surface of the battery rack. The vent of the downwind duct is inclined, and a filter plate for filtering dirt is installed inside the vent. The lower end of the movable block extends out of the bottom of the inner cavity of the battery rack and is elastically connected to a cleaning brush. The lower part of the cleaning brush is a soft brush, and the cleaning brush is adapted to the filter plate.

[0015] As a further improvement of the present technical solution, the ventilation mechanism also includes an electric push rod fixedly connected to the bottom of the battery rack and a dust cover fixedly connected to one end of the electric push rod. The electric push rod is installed in an inclined state under the battery rack so that when the dust cover is opened, it does not block the cleaning brush from cleaning the vent of the wind duct.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the new energy vehicle chassis seismic isolation device, during the operation of the seismic isolation mechanism, the movement of the positioning block drives the rack plate to move, and then drives the gear and the fan plate to rotate, which not only realizes the seismic isolation function of the battery rack and reduces the impact of vibration on the chassis and components; the force generated by the seismic isolation is used to drive the fan plate to rotate, forming an airflow to cool the battery pack, without the need for an additional power source to drive the cooling device, saving energy;

[0018] At the same time, the cold air generated by the car is guided to the downwind duct of the ventilation mechanism. Since the vents of the downwind duct are inclined, the cold air flows faster and quickly enters the battery rack, promoting air circulation inside the chassis, cooling the components on the chassis, and accelerating the cooling of the battery pack.

[0019] The movement of the inner rod in the isolation mechanism drives the moving block on its bottom to move, and the cleaning brush on the bottom of the moving block cleans the filter plate of the vent of the ventilation mechanism along the wind duct. While realizing the isolation function, the power generated by the isolation is used to realize the self-cleaning of the filter plate of the ventilation mechanism, thereby avoiding the accumulation of dirt on the filter plate to affect the ventilation effect, ensuring the normal operation of the ventilation mechanism, and continuously providing good air circulation and cooling effect for the inside of the battery rack. When new energy vehicles encounter obstacles such as stones during driving, the vehicle chassis will be subjected to a strong impact force due to the impact, and the force will be quickly transmitted to the isolation mechanism. The isolation mechanism immediately starts to work, effectively buffering the impact force and preventing the impact force from directly acting on the battery pack, thereby providing reliable protection for the battery pack, reducing the risk of damage to the battery pack due to impact, and ensuring the safe and stable operation of the core components of new energy vehicles.

[0020] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0022] Figure 2 Schematic diagram of the battery rack, seismic isolation mechanism, cooling mechanism and ventilation mechanism of the present invention

[0023] Figure 3 It is a schematic diagram of cutting and splitting of the present invention;

[0024] Figure 4 It is a cross-sectional view of the battery rack structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of point A;

[0026] Figure 6 It is a schematic diagram of the coordination relationship among the seismic isolation mechanism, the cooling mechanism and the ventilation mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the coordination relationship between the cooling mechanism and the ventilation mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the coordination relationship between the ventilation mechanism and the seismic isolation mechanism of the present invention;

[0029] Fig. 9 It is a schematic diagram of the ventilation mechanism of the present invention.

[0030] The meaning of each number in the figure is:

[0031] 100, battery rack; 101, roller; 102, heat dissipation vent plate; 103, battery pack;

[0032] 200, seismic isolation mechanism; 201, fixed block; 202, initial buffer rod; 203, secondary buffer rod;

[0033] 300, cooling mechanism; 301, rack plate; 302, gear; 303, stabilizing bracket; 304, fan plate;

[0034] 400, ventilation mechanism; 401, moving block; 402, downwind duct; 403, filter plate; 404, cleaning brush; 405, electric push rod; 406, dust cover. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figure 1 - Fig. 9 As shown, this embodiment provides a new energy vehicle chassis seismic isolation device, including a battery rack 100, rollers 101 are symmetrically installed on both sides of the vehicle chassis of the bottom surface of the battery rack 100, which are used to install the vehicle moving wheels, and the battery rack 100 is respectively installed with a seismic isolation mechanism 200 and a cooling mechanism 300, the seismic isolation mechanism 200 is used to isolate the battery rack 100, and the force generated by the seismic isolation mechanism 200 during the movement is transmitted to the cooling mechanism 300, so that the cooling mechanism 300 continuously cools the components on the battery rack 100 through its own rotation;

[0038] A ventilation mechanism 400 is installed under the battery rack 100. When the vehicle is running, the cold air generated by the movement is guided to the ventilation mechanism 400, which promotes the circulation of air inside the battery rack 100. At the same time, the force generated by the seismic isolation mechanism 200 during the movement of the vehicle is also used to drive the ventilation mechanism 400 to clean itself.

[0039] The ventilation opening of the ventilation mechanism 400 is in an inclined shape, which accelerates the flow of cold air, so that the cold air quickly enters the battery rack 100 and is transmitted to the components on the battery rack 100. (The battery rack 100 is used to connect the mobile chassis of the car)

[0040] When the present invention uses the chassis of a car, on the one hand, the battery pack 103 will be automatically started when the new energy car is running to provide power for the vehicle. However, the battery pack 103 will generate a lot of heat during use. If the temperature of the battery pack 103 is too high, the battery capacity will decay faster, the charging and discharging efficiency will be reduced, and even potential safety hazards will be caused. The traditional heat dissipation method, which simply relies on external fans for forced ventilation, not only has high energy consumption, but also its heat dissipation efficiency is difficult to meet the demand when the vehicle is running at high speed or under high load. Therefore, during the operation of the isolation mechanism 200, the movement of the secondary buffer rod 203 drives the rack plate 301 to move, and then drives the gear 302 and the fan plate 304 to rotate, which not only realizes the isolation function of the battery rack 100 and reduces the impact of vibration on the chassis and components; and uses the force generated by the isolation to drive the fan plate 304 to rotate, forming an airflow to cool the battery pack 103, without the need for an additional power source to drive the cooling device, saving energy.

[0041] On the other hand, during the driving of the vehicle, dust and debris on the road surface easily enter the vents with the air flow and adhere to the filter device, thereby reducing the ventilation efficiency. The traditional cleaning method either requires frequent manual cleaning and maintenance, or requires the start of a special power source to clean the vents, which makes it difficult to fully utilize the various energy and airflow resources during the driving of the vehicle. Therefore, the cold air generated by the driving of the car is guided to the downwind duct 402 of the ventilation mechanism 400. Since the vents of the downwind duct 402 are inclined, the cold air flows faster and quickly enters the battery rack 100, promoting air circulation inside the chassis, cooling the components on the chassis, and accelerating the cooling of the battery pack 103.

[0042] The movement of the secondary buffer rod 203 in the seismic isolation mechanism 200 drives the moving block 401 on its bottom to move, and the cleaning brush 404 on the bottom of the moving block 401 cleans the filter plate 403 of the vent of the wind duct 402 of the ventilation mechanism 400. While realizing the seismic isolation function, the power generated by the seismic isolation is used to realize self-cleaning of the filter plate 403 of the ventilation mechanism 400, thereby avoiding the accumulation of dirt on the filter plate 403 and affecting the ventilation effect, ensuring the normal operation of the ventilation mechanism 400, thereby continuously providing good air circulation and cooling effect for the inside of the battery rack 100.

[0043] On the basis of the above, the specific structure is disclosed in detail:

[0044] To achieve the vibration isolation of the battery rack 100 and the battery pack 103, as Figure 1 - Figure 3 As shown, the top of the battery rack 100 is slidably connected to a heat dissipation vent plate 102, and a battery pack 103 is fixedly installed on the top of the heat dissipation vent plate 102, which is used to provide a power source for the new energy vehicle. The seismic isolation mechanism 200 includes a fixed block 201 fixedly connected to the inner top wall of the battery rack 100, and both ends of the fixed block 201 are rotatably connected to an initial buffer rod 202, one end of the initial buffer rod 202 is movably connected to a secondary buffer rod 203, and the shell of the secondary buffer rod 203 is fixedly connected to the bottom of the inner cavity of the battery rack 100;

[0045] Therefore, when the battery rack 100 vibrates due to road bumps or other reasons, the fixed block 201 fixed on the top wall of the chassis will vibrate accordingly. Since the two ends of the fixed block 201 are rotatably connected to the initial buffer rod 202, the vibration will cause the initial buffer rod 202 to extend and retract. The extension and retraction of the initial buffer rod 202 drives the secondary buffer rod 203 to move and maintain its movement stability. The entire process absorbs and disperses the vibration energy through the extension and retraction of the initial buffer rod 202 and the buffering of the secondary buffer rod 203. Through such a seismic isolation mechanism 200, the vibration impact on the battery rack 100 is effectively reduced. For the battery pack 103 installed on the top of the heat dissipation ventilation plate 102, reducing vibration can prevent the battery cells and other precision components inside the battery pack 103 from loosening connections, structural damage and other problems due to long-term vibration.

[0046] To achieve cooling of the battery pack 103, Figure 6-Figure 8 As shown, the cooling mechanism 300 includes a rack plate 301 fixedly connected to one side of the secondary buffer rod 203, a gear 302 is meshedly connected at the outer edge of the rack plate 301, and a stabilizing bracket 303 is slidably connected to one side of the rack plate 301, and the top surface of the stabilizing bracket 303 is also connected to the inner bottom wall of the battery rack 100, and one end of the gear 302 is fixedly connected to a fan plate 304, and one end of the fan plate 304 is rotatably connected to the inner side wall of the battery rack 100, and the fan plate 304 rotates to form an airflow to cool the battery pack 103;

[0047] Therefore, based on the principle of mechanical transmission, when the seismic isolation mechanism 200 is working, the secondary buffer rod 203 will be displaced due to the bumpy road surface. Since the rack plate 301 is fixedly connected to one side of the secondary buffer rod 203, the movement of the secondary buffer rod 203 will drive the rack plate 301 to move synchronously. The outer edge of the rack plate 301 is meshed with the gear 302, and the linear movement of the rack plate 301 is converted into the rotational motion of the gear 302. One end of the gear 302 is fixedly connected to the fan plate 304, so when the gear 302 rotates, it drives the fan plate 304 to rotate around the inner wall of the battery rack 100. During the rotation of the fan plate 304, it promotes the flow of surrounding air to form an airflow, blowing the battery pack 103, and taking away the heat generated by the battery pack 103, thereby achieving cooling.

[0048] To achieve automatic cleaning of the ventilation mechanism 400 and air flow inside the battery rack 100, as Figure 5-Figure 9As shown, the ventilation mechanism 400 includes a moving block 401 fixedly connected to the bottom surface of the secondary buffer rod 203 and a downwind pipe 402 connected to the bottom surface of the battery rack 100. The ventilation opening of the downwind pipe 402 is inclined, and a filter plate 403 for filtering dirt is installed inside the ventilation opening. The lower end of the moving block 401 extends out of the bottom of the inner cavity of the battery rack 100 and is elastically connected to a cleaning brush 404. The lower part of the cleaning brush 404 is a soft brush, and the cleaning brush 404 is adapted to the filter plate 403. The ventilation mechanism 400 also includes an electric push rod 405 fixedly connected to the bottom of the battery rack 100 and a dust cover 406 fixedly connected to one end of the electric push rod 405. The electric push rod 405 is installed in an inclined state below the battery rack 100, so that after the dust cover 406 is opened, it does not block the cleaning brush 404 from cleaning the ventilation opening of the downwind pipe 402.

[0049] Therefore, when the car is driving, the relative airflow generated by the movement of the vehicle is used to pass through the downwind duct 402 with the inclined vent. According to the principle of aerodynamics, the inclined surface can accelerate the flow of cold air, guide the external cold air to quickly enter the battery rack 100, realize ventilation, reduce the temperature inside the chassis, and keep the air fresh.

[0050] At the same time, when the seismic isolation mechanism 200 is working, the secondary buffer rod 203 will move due to the vibration of the car. Since the moving block 401 is fixedly connected to the bottom surface of the secondary buffer rod 203, the movement of the secondary buffer rod 203 drives the moving block 401 to move synchronously, and the cleaning brush 404 connected to the bottom surface of the moving block 401 moves accordingly to clean the dirt attached to the filter plate 403. The electric push rod 405 controls the opening and closing of the dust cover 406. During cleaning, the electric push rod 405 opens the dust cover 406. Because it is installed at an angle, it will not block the cleaning path of the cleaning brush 404. After cleaning, the dust cover 406 can be closed to prevent debris from entering the vent.

[0051] The initial buffer rod 202 and the secondary buffer rod 203 are composed of an outer shell and an inner movable rod, and an elastic part is connected between the two. When subjected to a compressive force, the elastic part is compressed, so that the other end of the initial buffer rod 202 generates a thrust that can push the inner movable rod of the secondary buffer rod 203. This is the prior art, and people in this technical field can associate it, so it will not be elaborated here.

[0052] In summary, the overall working principle of the present invention is as follows:

[0053] When the new energy vehicle starts to drive, the wheels on the roller 101 drive the battery rack 100 forward, and the initial buffer rod 202 in the seismic isolation mechanism 200 automatically adjusts according to the bumpy road conditions to keep the battery rack 100 stable. Specifically:

[0054] During seismic isolation, the bumps on the road will cause the battery rack 100 to vibrate, that is, there will be relative movement between the battery rack 100 and the heat dissipation vent plate 102. At this time, whether the heat dissipation vent plate 102 moves relatively downward or the battery rack 100 moves relatively upward, the fixed block 201 fixed on the inner top wall of the battery rack 100 will be subjected to impact force, driving the initial buffer rod 202 connected at both ends to rotate and tilt. Under the buffering of the elastic member inside the initial buffer rod 202, the target is buffered for the first time, and the initial buffer rod 202 generates a thrust to push the inner movable rod of the secondary buffer rod 203 to slide relatively, further buffering the damage caused by the impact force, and realizing double buffering seismic isolation;

[0055] When the battery pack 103 actively dissipates heat, the cold air generated by the movement of the vehicle is guided to the downwind duct 402 of the ventilation mechanism 400. The vent of the downwind duct 402 is inclined, which accelerates the flow of cold air, allowing the cold air to quickly enter the battery rack 100, promote the circulation of air inside the chassis, and further cool the battery pack 103 on the chassis.

[0056] When the battery pack 103 is passively cooling, as the inner movable rod of the secondary buffer rod 203 slides relatively, on the one hand, the rack plate 301 is driven to slide relatively, so that the gear 302 meshes and rotates, driving the fan plate 304 to rotate and form airflow, accelerating the air flow, so that the airflow passes through the holes of the heat dissipation vent plate 102 and blows toward the battery pack 103 to further cool it down;

[0057] On the other hand, the moving block 401 is driven to slide relatively, so that the soft brush at the end of the moving block 401 scrapes the filter plate 403 on the top of the wind pipe 402 to avoid clogging of the filter plate 403 and affect the air flow, thereby improving the efficiency of active heat dissipation of the battery pack 103.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A new energy vehicle chassis seismic isolation device, comprising a battery rack (100), characterized in that: Rollers (101) are symmetrically mounted on both sides of the automobile chassis on the bottom surface of the battery rack (100) for mounting automobile moving wheels. A seismic isolation mechanism (200) and a cooling mechanism (300) are respectively mounted inside the battery rack (100). The seismic isolation mechanism (200) is used to isolate the battery rack (100), and the force generated by the seismic isolation mechanism (200) during movement is transmitted to the cooling mechanism (300), so that the cooling mechanism (300) continuously cools the components on the battery rack (100) through its own rotation. A ventilation mechanism (400) is installed below the battery rack (100). When the vehicle is running, cold air generated by the movement is guided to the ventilation mechanism (400), thereby promoting the circulation of air inside the battery rack (100). At the same time, the force generated by the seismic isolation mechanism (200) during the movement of the vehicle is also used to drive the ventilation mechanism (400) to self-clean. The ventilation opening of the ventilation mechanism (400) is in the shape of an inclined surface, which accelerates the flow of cold air, so that the cold air quickly enters the interior of the battery rack (100) and is transferred to the components on the battery rack (100).

2. The new energy vehicle chassis seismic isolation device according to claim 1 is characterized in that: The top of the battery rack (100) is slidably connected to a heat dissipation ventilation plate (102), and the top of the heat dissipation ventilation plate (102) is fixedly mounted with a battery pack (103) for providing a power source for the new energy vehicle.

3. The new energy vehicle chassis seismic isolation device according to claim 1 is characterized in that: The seismic isolation mechanism (200) comprises a fixed block (201) fixedly connected to the inner top wall of the battery rack (100), and both ends of the fixed block (201) are rotatably connected to initial buffer rods (202).

4. The new energy vehicle chassis seismic isolation device according to claim 3 is characterized in that: One end of the initial buffer rod (202) is movably connected to a secondary buffer rod (203), and the outer shell of the secondary buffer rod (203) is fixedly connected to the bottom of the inner cavity of the battery rack (100).

5. The new energy vehicle chassis seismic isolation device according to claim 1, characterized in that: The cooling mechanism (300) comprises a rack plate (301) fixedly connected to one side of the secondary buffer rod (203), a gear (302) being meshedly connected to the outer edge of the rack plate (301), and a stabilizing bracket (303) being slidably connected to one side of the rack plate (301), and the top surface of the stabilizing bracket (303) is also connected to the inner bottom wall of the battery rack (100).

6. The new energy vehicle chassis seismic isolation device according to claim 5 is characterized in that: One end of the gear (302) is fixedly connected to a fan plate (304), and one end of the fan plate (304) is rotatably connected to the inner wall of the battery rack (100). The fan plate (304) rotates to form an airflow to cool the battery pack (103).

7. The new energy vehicle chassis seismic isolation device according to claim 1, characterized in that: The ventilation mechanism (400) comprises a movable block (401) fixedly connected to the bottom surface of the secondary buffer rod (203) and a downwind pipe (402) connected to the bottom surface of the battery rack (100); the ventilation opening of the downwind pipe (402) is in the shape of an inclined surface, and a filter plate (403) for filtering dirt is installed inside the ventilation opening; the lower end of the movable block (401) extends out of the bottom of the inner cavity of the battery rack (100) and is elastically connected to a cleaning brush (404); the lower part of the cleaning brush (404) is a soft brush, and the cleaning brush (404) is adapted to the filter plate (403).

8. The new energy vehicle chassis seismic isolation device according to claim 7, characterized in that: The ventilation mechanism (400) further comprises an electric push rod (405) fixedly connected to the bottom of the battery rack (100) and a dust cover (406) fixedly connected to one end of the electric push rod (405); the electric push rod (405) is installed in an inclined manner below the battery rack (100) so that the dust cover (406) does not block the cleaning brush (404) from cleaning the ventilation opening of the downwind duct (402) after it is opened.

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