A new energy bus

Abstract

This invention relates to a new energy bus. The new energy bus includes a vehicle body, which includes a roof frame at the top, a roof skin covering the top of the roof frame, and a passenger area top layer located below the roof frame. A liquid heat exchange plate is fixed on the roof frame. The liquid heat exchange plate has a coolant inlet and a coolant outlet connected to an air conditioning system. A battery module is fixed on the top surface of the liquid heat exchange plate. A sealing cover covering the battery module is directly or indirectly sealed on the roof skin. A filler is provided between the liquid heat exchange plate and the passenger area top layer, forming a closed chamber. A window communicating with the passenger area is provided on the passenger area top layer at a position corresponding to the chamber, and a window body that can be opened and closed is provided at the window. A fan for blowing air into the passenger area through the window is provided in the chamber.

Description

Technical Field

[0001] This invention belongs to the field of new energy bus technology, specifically relating to the arrangement of batteries in a new energy bus and their heat exchange with the vehicle interior. Background Technology

[0002] High safety, low cost, and lightweight design are the main demands for the rapid development of the new energy industry. Currently, new energy buses generally adopt a standard battery pack solution. Multiple battery cells are assembled into a battery pack by means of adhesive bonding, bolting, etc. Multiple battery packs are connected in series and parallel through high and low voltage wiring harnesses, thermal management pipelines, etc., to form a battery system. The battery system is then mounted on the chassis of the vehicle using brackets, bolts, etc. This current approach has some drawbacks. For example, the battery packs are mostly bottom-mounted or rear-mounted, making them susceptible to damage from collisions, water immersion, etc., increasing maintenance costs, affecting bus operation, and in extreme cases, even causing safety accidents such as battery smoke and fire, resulting in property damage and personal injury, failing to meet the high safety requirements. In addition, the integrated approach of cell-battery module-battery pack-vehicle results in low space utilization and battery capacity loss, failing to meet users' demands for long driving range.

[0003] To address the existing drawbacks, current technologies employ a roof-mounted battery pack solution. Specifically, a battery mounting frame is fixed to the roof frame, the battery pack is secured to the mounting frame, and then a roof cover is used to cover the battery pack. This method is used in Chinese utility model patent CN206201949U.

[0004] While top-mounted battery packs address some issues associated with bottom- or rear-mounted battery packs, their integration method—cell-battery module-battery pack-vehicle—remains inefficient in terms of space utilization and cannot meet users' demands for extended driving range. Battery packs typically include built-in liquid heat exchange plates with flow channels. The air conditioning system is connected to these plates, using the liquid flow to heat or cool the batteries within the pack. Simultaneously, the air conditioning system also heats or cools the passenger area. In current new energy buses, the passenger area is completely separated from the battery pack on the top floor. The liquid in the heat exchange plates exchanges heat not only with the batteries above but also with the air below and other objects on the bus roof. This heat is directly dissipated into the air, failing to be effectively utilized. This results in low overall vehicle heat utilization, increased energy consumption, and a shortened driving range. Summary of the Invention

[0005] The purpose of this invention is to provide a new energy bus to solve the technical problems of low space utilization and low vehicle heat utilization in the prior art, which result in short driving range.

[0006] To achieve the above objectives, the technical solution for a new energy bus provided by the present invention is as follows: A new energy bus includes a vehicle body, which includes a roof frame at the top, a roof skin covering the top of the roof frame, and a passenger area top layer located below the roof frame. A liquid heat exchange plate is fixed on the roof frame, and the liquid heat exchange plate has a coolant inlet and a coolant outlet connected to an air conditioning system. A battery module is fixed on the top surface of the liquid heat exchange plate. A sealing cover covering the battery module is directly or indirectly sealed on the roof skin. A filler is provided between the liquid heat exchange plate and the passenger area top layer, forming a closed chamber together with the liquid heat exchange plate and the passenger area top layer. A window communicating with the passenger area is provided on the passenger area top layer at a position corresponding to the chamber, and a window body that can be opened and closed is provided at the window. A fan for blowing air into the passenger area through the window is provided in the chamber.

[0007] Beneficial Effects: The battery modules are directly mounted on the roof frame via a liquid heat exchange plate, and a sealed cover forms a sealed chamber to protect the battery modules. Compared with existing technologies that require a complete battery pack, this eliminates the need for side panels and top panels, resulting in a more significant weight reduction advantage. More battery modules can be arranged within the same space, increasing the driving range of the new energy bus. By setting up a closed chamber below the liquid heat exchange plate and opening windows on the top floor of the passenger area equipped with window frames and fans, the liquid flows through the heat exchange plate, exchanging heat between the top surface and the battery modules, and between the bottom and the chamber. When the window is open, the fan blows the heat from the chamber into the passenger area as cool or hot air, cooling or heating the passenger area. This reduces the power consumption required by the air conditioning system to cool or heat the passenger area, effectively utilizing the heat below the liquid heat exchange plate, improving the overall vehicle's heat utilization rate, and increasing the driving range.

[0008] Furthermore, the roof skin has an opening at the chamber, allowing the liquid heat exchange plate to be directly connected to the chamber. With the liquid heat exchange plate directly connected to the chamber, heat exchange occurs directly between the bottom of the liquid heat exchange plate and the chamber, thereby heating or cooling the chamber. Compared to indirect heat transfer through the roof skin, this method offers higher heat transfer efficiency and higher heat utilization.

[0009] Furthermore, the top of the filler is sealed to the liquid heat exchange plate, and the bottom is sealed to the top layer of the passenger area to form the chamber; alternatively, the liquid heat exchange plate is supported on the roof skin and sealed to it, with the top of the filler sealed to the roof skin and the bottom sealed to the top layer of the passenger area to form the chamber. Choosing a method appropriately based on the size of the opening on the roof skin ensures the chamber's airtightness.

[0010] Furthermore, the fan is fixed to the bottom surface of the liquid heat exchange plate. Fixing the fan to the liquid heat exchange plate avoids increasing the load on the top floor of the passenger area.

[0011] Furthermore, the window is rotatably mounted on the top layer of the passenger area. The new energy bus includes a motor that drives the window to rotate and open / close. The new energy bus also includes a controller for controlling the motor's start / stop and rotation direction. The controller controls the motor to open the window when both the battery module and the passenger area are cooling or heating, and controls the motor to close the window when only one of the battery module or the passenger area is cooling or heating. The motor and controller achieve automated window opening and closing, eliminating the need for manual operation and making it convenient to use.

[0012] Furthermore, the liquid heat exchange plate has mounting ears on its outer edge, with bolt holes in the mounting ears; the roof frame has threaded holes or pre-welded nuts, and the new energy bus includes bolts that pass through the bolt holes in the mounting ears and are screwed into the threaded holes or nuts, the bolts fixing the liquid heat exchange plate to the roof frame. The liquid heat exchange plate is installed on the roof frame by a threaded connection, which facilitates disassembly and assembly.

[0013] Furthermore, the sealing cover has a sealing flange at its edge, and a sealing gasket is provided on one of the bottom surfaces of the sealing flange and the top surface of the roof skin. The sealing flange has bolt holes, and the roof skin has threaded holes or a pre-welded nut. In new energy buses, a bolt passes through the bolt holes in the sealing flange and is screwed into the threaded holes or nuts on the roof skin. The bolt secures the sealing flange to the roof skin, and the sealing gasket elastically deforms to ensure a tight seal between the sealing flange and the roof skin. By providing the sealing flange and sealing gasket, the sealing performance between the sealing cover and the roof skin is guaranteed, preventing external rainwater and other substances from entering the space formed by the sealing cover and the roof.

[0014] Furthermore, the sealing cover has a sealing flange at its edge, and a sealing body is welded to the roof skin corresponding to the sealing flange. A sealing gasket is provided on one of the bottom surface of the sealing flange or the top surface of the sealing body. The sealing flange has a bolt hole, and the sealing body has a threaded hole or a pre-welded nut. In new energy buses, a bolt passes through the bolt hole in the sealing flange and is screwed into the threaded hole or nut on the sealing body. The bolt secures the sealing flange to the sealing body, and the sealing gasket elastically deforms to ensure the sealing performance between the sealing flange and the sealing body. By welding the sealing body to the roof skin and then drilling a threaded hole or welding a nut to the sealing body, damage to the roof skin can be avoided. This ensures the sealing performance between the sealing cover and the roof while maintaining the liquid-proof and flame-retardant properties of the roof skin.

[0015] Furthermore, the sealing cover has a sealing flange at its edge, and both the top surface of the sealing flange and the bottom surface of the roof panel have adhesive storage grooves. These grooves store sealant to bond the sealing flange and the roof panel together and ensure a tight seal between them. Connecting the sealing cover and the roof panel using adhesive not only ensures a tight seal but also allows for quick and easy installation.

[0016] Furthermore, the sealing cover has a sealing flange at its edge, and a sealing body is welded onto the roof skin corresponding to the sealing flange. Both the bottom surface of the sealing flange and the top surface of the sealing body have adhesive storage grooves. These grooves store sealant to bond the sealing flange and sealing body together and ensure a tight seal between them. The installation of the sealing body prevents damage to the roof skin, ensuring both a tight seal and maintaining the roof skin's liquid-repellent and flame-retardant properties. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the top of the new energy bus provided by the present invention (the sealing cover is not shown);

[0018] Figure 2 This is a schematic diagram illustrating the assembly of the battery module, sealing cover, roof skin, and roof frame in a new energy bus provided by the present invention.

[0019] Figure 3 This is a schematic diagram illustrating the fit between the sealing cover, battery module, roof frame, and sealing surface in the new energy bus provided by the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Passenger area; 2. Top layer of passenger area; 3. Roof skin; 4. Liquid heat exchange plate opening; 5. Battery module; 6. Liquid heat exchange plate; 7. Bolt; 8. Mounting lug; 9. Roof frame; 10. Fan; 11. Window; 12. Chamber; 13. Sealing cover; 14. Sealing flange; 15. Sealing body; 16. Sealing gasket. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0027] The present invention will be further described in detail below with reference to the embodiments.

[0028] Specific embodiments of the new energy bus provided by this invention:

[0029] like Figures 1 to 3 As shown, the new energy bus includes a vehicle body, which includes a roof frame 9 and a roof skin 3 located at the top. There is a passenger area 1 inside the vehicle body, and a passenger area top layer 2 on top of the passenger area 1. The passenger area top layer 2 separates the roof frame 9 and the passenger area 1.

[0030] A battery module 5 is fixedly placed on the top of the vehicle body. The battery module 5 is formed by stacking battery cells, with the cells upright and the terminals facing upwards. The battery module 5 can be formed using structural adhesive, plastic brackets, end plates, side plates, cable ties, etc. The forming method of the battery module 5 is existing technology and will not be described further. The number of battery modules 5 can be designed and changed according to actual conditions. The placement direction of the battery modules 5 can be parallel to the vehicle's driving direction, perpendicular to the vehicle's driving direction, or a combination of both. In other embodiments, the battery cells in the battery module 5 can be placed sideways or flat, with the terminals facing one side.

[0031] like Figure 1 As shown, a liquid heat exchange plate 6 is first fixed on the top of the vehicle body. The liquid heat exchange plate 6 has a liquid flow channel. The surface of the liquid heat exchange plate 6 has a liquid heat exchange plate opening 4 that communicates with the liquid flow channel. One part of the liquid heat exchange plate opening 4 serves as a coolant inlet, and the other part of the liquid heat exchange plate opening 4 serves as a coolant outlet. The air conditioning system is connected to the coolant inlet and coolant outlet. The coolant flows in the liquid heat exchange plate 6 to heat and cool the battery module 5.

[0032] The battery module 5 is fixed to the top surface of the liquid heat exchange plate 6 by structural adhesive. Of course, in other embodiments, the battery module 5 can be fixed to the liquid heat exchange plate 6 with bolts, or a pressure plate can be set to press the battery module 5 onto the liquid heat exchange plate 6.

[0033] like Figure 1 As shown, to fix the liquid heat exchange plate 6 to the top of the vehicle body, mounting ears 8 are fixed on the liquid heat exchange plate 6. The mounting ears 8 can be welded to the liquid heat exchange plate 6 or integrally machined with the liquid heat exchange plate 6. The number of mounting ears 8 is selected according to the size of the liquid heat exchange plate 6 and the position of the roof frame 9. They can be set on the left and right sides, front and rear sides of the battery module 5. In general, the number of mounting ears 8 is greater than 6. Threaded holes are machined in the roof frame 9, and bolt through holes are opened on the mounting ears 8. During assembly, the bolt 7 passes through the mounting ears 8 and then into the threaded holes of the roof frame 9 to fix the mounting ears 8 and the liquid heat exchange plate 6 to the roof frame 9. When inserting the bolt 7, the bolt 7 penetrates the roof skin 3. In other embodiments, nuts are pre-welded inside the roof frame 9, and the bolt 7 passes into the pre-welded nuts of the roof frame 9 to achieve fixation. In other embodiments, the liquid heat exchange plate 6 can be installed on the roof frame 9 by welding or pin fixing; in other embodiments, the liquid heat exchange plate 6 is pressed and fixed on the roof frame 9 by a cylinder, and when disassembly, maintenance or replacement is required, the air source of the cylinder can be disconnected to achieve quick disassembly.

[0034] The assembly of the battery module 5, the roof frame 9, and the liquid heat exchange plate 6 can be flexibly chosen. The battery module 5 and the liquid heat exchange plate 6 can be fixed offline first and then assembled onto the roof frame 9 as a whole; or the liquid heat exchange plate 6 can be fixed onto the roof frame 9 first, and then the battery module 5 can be fixed onto the liquid heat exchange plate 6.

[0035] A filler is provided between the roof skin 3 and the passenger area top layer 2. This filler is a partition or other filler (not shown in the figure). The filler, together with the liquid heat exchange plate 6 and the passenger area top layer 2, forms a chamber 12, allowing heat from the liquid heat exchange plate 6 to be transferred into the chamber 12. To improve the heat transfer between the liquid heat exchange plate 6 and the chamber 12, the roof skin 3 has an opening at the liquid heat exchange plate 6, allowing the chamber 12 to directly contact the bottom surface of the liquid heat exchange plate 6. In some embodiments, the opening area on the roof skin 3 is larger than the area of ​​the liquid heat exchange plate 6. In this case, the top of the partition or filler is sealed to the liquid heat exchange plate 6, thus sealing the chamber 12. In other embodiments, the opening area on the roof skin 3 can be smaller than the area of ​​the liquid heat exchange plate 6. In this case, the liquid heat exchange plate 6 is supported on the roof skin 3, and there is a good seal between the liquid heat exchange plate 6 and the roof skin 3. The top of the filler is sealed to the roof skin 3, thus sealing the chamber 12. Among them, the liquid heat exchange plate 6 is a metal plate with a large heat transfer coefficient.

[0036] like Figure 1 As shown, a window is provided on the top floor 2 of the passenger area, connecting the chamber 12 and the passenger area 1. A window frame 11 is rotatably installed on the top floor 2 of the passenger area. The window frame 11 can both cover and open the window. A fan 10 is installed in the chamber 12. Specifically, the fan 10 is installed on the bottom surface of the liquid heat exchange plate 6, and the fan 10 is directly opposite the window, blowing air towards the window. In this new energy bus, the window frame 11 is equipped with a motor and a controller. The motor is connected to the window frame 11 and can drive the window frame to cover or open the window. The controller can control the start, stop, and rotation direction of the motor.

[0037] like Figure 2 and Figure 3 As shown, a sealing cover 13 is also installed on the top of the vehicle body. The sealing cover 13 covers the battery module 5 and forms a closed chamber together with the top of the vehicle body. The sealing cover 13 can be made of composite material, plastic material or metal material. There is a sealing flange 14 at the edge of the sealing cover 13. The bottom of the sealing flange 14 has a flat sealing surface and a pre-set perforation.

[0038] A sealing body 15 is provided on the top of the roof skin 3 corresponding to the sealing flange 14. The sealing body 15 is a metal profile welded to the roof skin 3, ensuring a good seal between the metal profile and the roof skin 3. Threaded holes are machined on the metal profile. A sealing gasket 16 is fixed to the metal profile. The sealing gasket 16 is an elastic material, such as a silicone gasket or a foam gasket. During assembly, the bolt passes through the sealing flange 14 and is screwed into the threaded hole of the metal profile. The sealing gasket 16 deforms under pressure, achieving a seal. Alternatively, in other embodiments, nuts can be pre-welded to the metal profile to mate with the bolts. In other embodiments, the sealing gasket 16 can be omitted, and glue reservoirs can be formed on the bottom surface of the sealing flange 14 and the top surface of the sealing body 15. Sealant is filled into the glue reservoirs to bond and fix the sealing cover 13 and the sealing body 15 together, ensuring sealing performance. In other embodiments, the sealing body 15 can be a sheet metal welded to the roof skin 3; in other embodiments, the sealing body 15 can be directly part of the roof skin. In other embodiments, the sealing gasket 16 is disposed on the bottom surface of the sealing flange 14. In other embodiments, the sealing flange 14 is omitted, and the sealing cover 13 is directly installed on the roof of the vehicle using structural adhesive.

[0039] The sealing cover 13 and the top of the vehicle body form a closed battery housing cavity. The battery module 5 is located in the battery housing cavity. Compared with the existing technology of fixing the battery pack on the top of the vehicle body, it is not necessary to set up side plates, top plates and other structures of the battery pack, which saves materials and achieves lightweighting. At the same time, it saves space, and more battery modules 5 can be arranged in a limited space, which is conducive to improving the driving range of new energy buses.

[0040] In this embodiment, the passenger area 1 and the chamber 12 are connected by a window and a window frame 11. When both the passenger area 1 and the battery module 5 require cooling, the air conditioning system simultaneously cools the liquid heat exchange plate 6 and the passenger area 1. The top surface of the liquid heat exchange plate 6 exchanges heat with the battery module 5, thereby cooling the battery module 5. The bottom surface of the liquid heat exchange plate 6 exchanges heat with the chamber 12, thereby cooling the chamber 12. At this time, the controller controls the motor to open the window frame 11, and the fan 10 delivers the cold air from the chamber 12 to the passenger area 1. The same working process applies to the heating operation. When only the passenger area 1 or only the battery module 5 is cooled or heated, the window frame 11 closes, and there is no longer heat exchange between the passenger area 1 and the chamber 12. By setting up the chamber 12, the window, and the window frame 11, the cooling or heating energy at the bottom of the liquid heat exchange plate 6 can be prevented from being lost into the air and not effectively utilized, thereby improving the energy utilization rate of the entire vehicle.

[0041] In other embodiments, the window 11 is rotated manually, or the window 11 can be detachably installed on the top layer 2 of the passenger area.

[0042] In other embodiments, the roof skin 3 remains intact, and the chamber 12 exchanges heat with the liquid heat exchange plate 6 through the roof skin 3. Although the heat exchange efficiency will decrease, the heat utilization rate is still improved compared with the prior art.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new energy bus, comprising a vehicle body, the vehicle body including a roof frame (9) at the top, a roof skin (3) covering the top of the roof frame (9), and a passenger area top layer (2) located below the roof frame (9), characterized in that: A liquid heat exchange plate (6) is fixed on the roof frame (9). The liquid heat exchange plate (6) has a coolant inlet and a coolant outlet connected to the air conditioning system. A battery module (5) is fixed on the top surface of the liquid heat exchange plate (6). A sealing cover (13) covering the battery module (5) is directly or indirectly sealed on the roof skin (3). A filler is provided between the liquid heat exchange plate (6) and the top layer of the passenger area (2) to form a closed chamber (12) together with the liquid heat exchange plate (6) and the top layer of the passenger area (2). A window communicating with the passenger area (1) is provided on the top layer of the passenger area (2) at the position corresponding to the chamber (12), and a window body (11) that can be opened and closed is provided at the window. A fan (10) for blowing air into the passenger area (1) through the window is provided in the chamber (12).

2. The new energy bus according to claim 1, characterized in that: The roof skin (3) has an opening at the chamber (12) so that the liquid heat exchange plate (6) is directly connected to the chamber (12).

3. The new energy bus according to claim 2, characterized in that: The top of the filler is sealed to the liquid heat exchange plate (6) and the bottom is sealed to the passenger area top layer (2) to form the chamber (12); or, the liquid heat exchange plate (6) is supported on the roof skin (3) and sealed to the roof skin (3), and the top of the filler is sealed to the roof skin (3) and the bottom is sealed to the passenger area top layer (2) to form the chamber (12).

4. The new energy bus according to claim 2, characterized in that: The fan (10) is fixed on the bottom surface of the liquid heat exchange plate (6).

5. The new energy bus according to claim 1, characterized in that: The window (11) is rotatably mounted on the top layer (2) of the passenger area. The new energy bus includes a motor that drives the window (11) to rotate to open and close the window. The new energy bus also includes a controller for controlling the start and stop of the motor and the direction of rotation. The controller is used to control the motor to open the window when both the battery module (5) and the passenger area (1) are cooling or heating, and to control the motor to close the window when only one of the battery module (5) and the passenger area (1) is cooling or heating.

6. The new energy bus according to any one of claims 1-5, characterized in that: The liquid heat exchange plate (6) has mounting ears (8) on its outer edge, and bolt holes are provided in the mounting ears (8); the roof frame (9) has threaded holes or pre-welded nuts, and the new energy bus includes bolts (7) that pass through the bolt holes of the mounting ears (8) and are screwed into the threaded holes or nuts, and the bolts (7) fix the liquid heat exchange plate (6) to the roof frame (9).

7. The new energy bus according to any one of claims 1-5, characterized in that: The sealing cover (13) has a sealing flange (14) at its edge. A sealing gasket (16) is provided on one of the bottom surface of the sealing flange (14) and the top surface of the roof skin (3). The sealing flange (14) has a bolt hole, and the roof skin (3) has a threaded hole or a nut pre-welded to it. The new energy bus includes a bolt (7) that passes through the bolt hole of the sealing flange (14) and is screwed into the threaded hole or nut on the roof skin (3). The bolt (7) fixes the sealing flange (14) to the roof skin (3). The sealing gasket (16) is elastically deformed to ensure the sealing performance between the sealing flange (14) and the roof skin (3).

8. The new energy bus according to any one of claims 1-5, characterized in that: The sealing cover (13) has a sealing flange (14) at its edge. A sealing body (15) is welded to the roof skin (3) at the position corresponding to the sealing flange (14). A sealing gasket (16) is provided on one of the bottom surface of the sealing flange (14) and the top surface of the sealing body (15). The sealing flange (14) has a bolt hole. The sealing body (15) has a threaded hole or a nut pre-welded to it. The new energy bus includes a bolt (7) that passes through the bolt hole of the sealing flange (14) and is screwed into the threaded hole or nut on the sealing body (15). The bolt (7) fixes the sealing flange (14) to the sealing body (15). The sealing gasket (16) is elastically deformed to ensure the sealing performance between the sealing flange (14) and the sealing body (15).

9. The new energy bus according to any one of claims 1-5, characterized in that: The sealing cover (13) has a sealing flange (14) at its edge. The top surface of the sealing flange (14) and the bottom surface of the roof skin (3) are both provided with a glue storage groove. The glue storage groove is used to store sealant to bond the sealing flange (14) and the roof skin (3) together and ensure the sealing performance between the sealing flange (14) and the roof skin (3).

10. The new energy bus according to any one of claims 1-5, characterized in that: The sealing cover (13) has a sealing flange (14) at its edge. A sealing body (15) is welded to the roof skin (3) at the position corresponding to the sealing flange (14). Both the bottom surface of the sealing flange (14) and the top surface of the sealing body (15) are provided with glue storage grooves. The glue storage grooves are used to store sealant to bond the sealing flange (14) and the sealing body (15) together and ensure the sealing performance between the sealing flange (14) and the sealing body (15).

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