New energy automobile battery protection cover

Abstract

The utility model discloses a new energy automobile battery protection cover which comprises a shell, a battery pack is arranged in the shell, a heat insulation plate is arranged in the shell, and a steel plate and a pressure relief opening are respectively arranged below the shell. Through cooperation of the shell, the thermal insulation plate, the pressure relief opening and the battery pack, the thermal insulation layer is arranged on the surface of the inner wall of the shell and is sufficient to form an isolation area for the battery pack, and due to the fact that the interior of the shell is in a closed state, when thermal runaway and explosion occur to batteries, the batteries can be discharged downwards through the lower pressure relief opening; and since the thermal insulation plate and the shell form a plurality of isolation regions, the batteries in other isolation regions cannot be influenced when spontaneous combustion is caused by out-of-control chemical reaction generated in the single battery, so that the overall loss of the battery is reduced, the scale of spontaneous combustion can be controlled, and the service life of the battery is prolonged. And convenience is provided for subsequent troubleshooting.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy battery protection, in particular to a new energy vehicle battery protection cover. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as their power source (or use conventional automotive fuels and adopt new on-board power devices), and integrate advanced technologies in vehicle power control and drive to form vehicles with advanced technical principles, new technologies, and new structures.

[0003] The battery pack of new energy vehicles has a large capacity. Generally, the power battery voltage is between 100 and 400V, and the output current can reach more than 300A. If the battery pack is squeezed or punctured, it will cause safety hazards such as thermal runaway, fire, and explosion.

[0004] The cause of the currently known cases of spontaneous combustion of new energy vehicles is the battery. In addition to circuit problems, bumps and collisions are also a major cause of battery spontaneous combustion. However, the batteries of new energy vehicles usually use multiple small batteries connected in series. Therefore, when one of the batteries is squeezed, the high temperature generated in a short period of time will cause other batteries to burn in series. In order to solve this technical problem, the utility model proposes a new energy vehicle battery protective cover. Utility Model Content

[0005] The main purpose of the utility model is to provide a new energy vehicle battery protection cover, which can effectively solve the problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A new energy vehicle battery protection cover comprises a shell, a battery pack is arranged inside the shell, a thermal insulation plate is arranged inside the shell, and a steel plate and a pressure relief port are respectively arranged below the shell.

[0008] Preferably, a fixing seat is fixedly mounted on the outer surface of the shell, a top plate is fixedly mounted on the outer surface of the fixing seat, and a bottom plate is fixedly mounted on the inner wall of the shell.

[0009] Preferably, an isolation plate is fixedly mounted on the inner wall of the shell, an inner cavity is opened inside the isolation plate, and the outer surface of the insulation plate is fixedly mounted to the outer surface of the isolation plate.

[0010] Preferably, an impact plate is fixedly mounted on the outer surface of the isolation plate, and an outer panel is fixedly mounted on the outer surface of the impact plate.

[0011] Preferably, the pressure relief port is arranged on the inner side of the bottom plate, the steel plate is mounted on the inner wall of the pressure relief port, a waterproof layer is arranged on the surface of the steel plate, and the outer surface of the waterproof layer is in close contact with the bottom surface of the battery pack.

[0012] Preferably, a slide rail is fixedly mounted on the bottom surface of the bottom plate, a bottom shell is slidably connected to the outer surface of the slide rail, a reserved groove is opened on the inner side of the bottom shell, and a plastic shell is fixedly mounted on the inner wall of the reserved groove.

[0013] Preferably, the inner wall of the bottom shell is slidably connected with a slide rod, the bottom end of the slide rod is fixedly installed with a limit plate, the outer surface of the slide rod is sleeved with a spring, and the top end of the spring and the top end of the slide rod are both fixedly installed on the outer surface of the fixing seat.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, a thermal insulation layer is provided on the inner wall surface of the outer shell through the cooperation between the outer shell, the thermal insulation plate, the pressure relief port and the battery pack. The main material of the thermal insulation layer is a dock alloy, which can be sufficient to resist the high temperature of one thousand degrees Celsius generated when the battery burns. The material of the thermal insulation plate is polytetrafluoroethylene, which can maintain stability in a high temperature environment and is sufficient to form an isolation zone for the battery pack. Since the interior of the outer shell is in a closed state, when the battery has thermal runaway and explosion, it can be discharged downward through the pressure relief port below, so that the harmful gas and flame generated by the battery are discharged downward, thereby reducing the possibility of toxic gas entering the vehicle. In addition, since the thermal insulation plate and the outer shell form isolation zones, when a single battery has a runaway chemical reaction and causes it to spontaneously combust, it will not affect the batteries in other isolation zones, thereby reducing the overall loss of the battery and being able to control the scale of spontaneous combustion, providing convenience for subsequent investigation.

[0016] In the utility model, through the cooperation between the battery pack, the steel plate and the waterproof layer, a number of small holes are arranged on the inner side of the steel plate. When the battery pack spontaneously ignites, the pressure, poisonous gas and flame can be discharged downward through the small holes on the steel plate. The steel plate and the small holes arranged inside are all provided with a layer of silicon nitride ceramic, which can have a heat insulating effect and reduce the deformation of the steel plate due to heat. The steel plate can provide protection for the bottom of the battery pack, reducing the probability of the battery pack spontaneously igniting due to the collision of foreign objects below, and the waterproof layer is made of rubber material, which can seal the pressure relief port during normal periods and block external liquid from entering the interior of the outer shell. However, when the battery spontaneously ignites, the high temperature of two hundred to one thousand degrees Celsius generated in sixty seconds and one hundred and eighty seconds can quickly burn through the waterproof layer in a short time, so that it will not hinder the poisonous gas and high-temperature flames from releasing pressure downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the overall structure of a battery protection cover for a new energy vehicle according to the utility model;

[0018] Figure 2 This is a schematic diagram of the battery pack arrangement structure of a new energy vehicle battery protection cover of the utility model;

[0019] Figure 3 for Figure 2 A is an enlarged schematic diagram of the structure;

[0020] Figure 4 This is a schematic diagram of the overall explosion structure of a battery protection cover for a new energy vehicle according to the utility model;

[0021] Figure 5 The utility model is a schematic structural diagram of a thermal insulation plate and its accessory components of a new energy vehicle battery protection cover.

[0022] In the figure: 1. outer shell; 2. battery pack; 3. insulation board; 4. steel plate; 5. pressure relief port; 6. fixing seat; 7. top plate; 8. bottom plate; 9. isolation plate; 10. inner cavity; 11. impact plate; 12. outer plate; 13. waterproof layer; 14. slide rail; 15. bottom shell; 16. reserved groove; 17. plastic shell; 18. slide rod; 19. limit plate; 20. spring. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-5 As shown, a new energy vehicle battery protection cover includes a shell 1, a battery pack 2 is arranged inside the shell 1, a thermal insulation board 3 is arranged inside the shell 1, a steel plate 4 and a pressure relief port 5 are arranged below the shell 1, and a thermal insulation layer is arranged on the inner wall surface of the shell 1, the main material of which is a dock alloy, which can be sufficient to resist the high temperature of one thousand degrees Celsius generated when the battery burns, and the material of the thermal insulation board 3 is polytetrafluoroethylene, which can maintain stability in a high temperature environment, and is sufficient to form an isolation zone for the battery pack 2. Since the interior of the shell 1 is in a closed state, when the battery has thermal runaway and explosion, it can be discharged downward through the pressure relief port 5 below, so that the harmful gas and flame generated by the battery are discharged downward, thereby reducing the possibility of poisonous gas entering the vehicle, and because the thermal insulation board 3 and the shell 1 form isolation zones, when a single battery has a runaway chemical reaction and causes it to spontaneously combust, it will not affect the batteries in other isolation zones, thereby reducing the overall loss of the battery, and can control the scale of spontaneous combustion, providing convenience for subsequent investigation.

[0025] A fixing seat 6 is fixedly installed on the outer surface of the shell 1, a top plate 7 is fixedly installed on the outer surface of the fixing seat 6, and a bottom plate 8 is fixedly installed on the inner wall of the shell 1. The shell 1, the fixing seat 6, the top plate 7 and the bottom plate 8 form a relatively sealed environment, forcing the pressure generated by spontaneous combustion of the battery to be discharged only downward, reducing damage to the vehicle body and the interior of the vehicle.

[0026] An isolation plate 9 is fixedly installed on the inner wall of the outer shell 1, and an inner cavity 10 is opened inside the isolation plate 9. The outer surface of the insulation plate 3 and the outer surface of the isolation plate 9 are fixedly installed. The interior of the inner cavity 10 is in a vacuum state, which can further enhance the insulation effect. The isolation plate 9 itself is made of silicon carbide ceramic material and has excellent high temperature resistance.

[0027] An impact plate 11 is fixedly installed on the outer surface of the isolation plate 9, and an outer plate 12 is fixedly installed on the outer surface of the impact plate 11. Aerogel is filled between the impact plate 11 and the isolation plate 9 to reduce the thermal conductivity coefficient. The impact plate 11 is an asbestos board made of fiber bundles, which has high fire resistance, electrical insulation and heat insulation. The impact plate 11 is an arch shape, which can effectively resist the natural impact of the battery in a short period of time.

[0028] The pressure relief port 5 is arranged on the inner side of the bottom plate 8, and the steel plate 4 is installed on the inner wall of the pressure relief port 5. A waterproof layer 13 is arranged on the surface of the steel plate 4, and the outer surface of the waterproof layer 13 is in close contact with the bottom surface of the battery pack 2. A number of small holes are arranged on the inner side of the steel plate 4. When the battery pack 2 explodes, the pressure, poisonous gas and flame can be discharged downward through the small holes on the steel plate 4. The steel plate 4 and the small holes arranged inside are all provided with a layer of silicon nitride ceramic, which can have a heat insulating effect to reduce the deformation of the steel plate 4 due to heat. The steel plate 4 can provide protection for the bottom of the battery pack 2 and reduce the probability of the battery pack 2 exploding due to the collision of foreign objects below. The waterproof layer 13 is made of rubber, which can seal the pressure relief port 5 during normal periods and block the external liquid from entering the interior of the outer shell 1. However, when the battery explodes, the high temperature of two hundred to one thousand degrees Celsius generated in sixty seconds and one hundred and eighty seconds can quickly burn through the waterproof layer 13 in a short time, so that it will not hinder the poisonous gas and high-temperature flames from releasing pressure downward.

[0029] A slide rail 14 is fixedly installed on the bottom surface of the bottom plate 8, and a bottom shell 15 is slidably connected to the outer surface of the slide rail 14. A reserved groove 16 is opened on the inner side of the bottom shell 15, and a plastic shell 17 is fixedly installed on the inner wall of the reserved groove 16. When the bottom shell 15 is hit by foreign objects from below, it can move upward in the direction given by the slide rail 14. When the bottom plate 8 moves upward, the driver will be informed through the central control screen in the cab, thereby reducing the probability of the battery pack 2 being hit. The plastic shell 17 can prevent external foreign objects from colliding with the steel plate 4 through the reserved groove 16, thereby reducing the blockage of the small holes inside the steel plate 4, and when the battery is natural, it can directly and quickly burn through the plastic shell 17.

[0030] The inner wall of the bottom shell 15 is slidably connected with a slide bar 18, and a limit plate 19 is fixedly installed at the bottom end of the slide bar 18. A spring 20 is sleeved on the outer surface of the slide bar 18. The top of the spring 20 and the top of the slide bar 18 are both fixedly installed on the outer surface of the fixing seat 6. The spring 20 can always push the bottom shell 15 so that the bottom shell 15 is always in contact with the limit plate 19 under normal circumstances. Once the bottom shell 15 loses contact with the limit plate 19, an alarm will be issued through the central control screen, thereby leaving enough reaction time and troubleshooting opportunities for the driver.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A new energy vehicle battery protection cover, characterized in that: It comprises an outer shell (1), a battery pack (2) is arranged inside the outer shell (1), a temperature insulation plate (3) is arranged inside the outer shell (1), and a steel plate (4) and a pressure relief port (5) are arranged below the outer shell (1).

2. A new energy vehicle battery protection cover according to claim 1, characterized in that: A fixing seat (6) is fixedly mounted on the outer surface of the outer shell (1), a top plate (7) is fixedly mounted on the outer surface of the fixing seat (6), and a bottom plate (8) is fixedly mounted on the inner wall of the outer shell (1).

3. A new energy vehicle battery protection cover according to claim 2, characterized in that: An isolation plate (9) is fixedly mounted on the inner wall of the outer shell (1), an inner cavity (10) is provided inside the isolation plate (9), and the outer surface of the insulation plate (3) is fixedly mounted to the outer surface of the isolation plate (9).

4. A new energy vehicle battery protection cover according to claim 3, characterized in that: An impact plate (11) is fixedly mounted on the outer surface of the isolation plate (9), and an outer surface plate (12) is fixedly mounted on the outer surface of the impact plate (11).

5. The new energy vehicle battery protection cover according to claim 2, characterized in that: The pressure relief port (5) is arranged on the inner side of the bottom plate (8), the steel plate (4) is mounted on the inner wall of the pressure relief port (5), a waterproof layer (13) is arranged on the surface of the steel plate (4), and the outer surface of the waterproof layer (13) is in close contact with the bottom surface of the battery pack (2).

6. The new energy vehicle battery protection cover according to claim 3, characterized in that: A slide rail (14) is fixedly mounted on the bottom surface of the bottom plate (8); a bottom shell (15) is slidably connected to the outer surface of the slide rail (14); a reserved groove (16) is provided on the inner side of the bottom shell (15); and a plastic shell (17) is fixedly mounted on the inner wall of the reserved groove (16).

7. A new energy vehicle battery protection cover according to claim 6, characterized in that: The inner wall of the bottom shell (15) is slidably connected to a slide rod (18), the bottom end of the slide rod (18) is fixedly mounted with a limit plate (19), the outer surface of the slide rod (18) is sleeved with a spring (20), and the top end of the spring (20) and the top end of the slide rod (18) are both fixedly mounted on the outer surface of the fixing seat (6).

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