Emergency cooling device for power battery of electric vehicle

Abstract

The invention discloses an electric vehicle power battery emergency cooling device in the technical field of electric vehicle batteries, and the electric vehicle power battery emergency cooling device comprises a shell, a folding sealing structure, a heat dissipation assembly, a high-temperature driving assembly and a rapid cooling assembly. And when the temperature of the lithium battery assembly is too high, the lithium battery assembly is unfolded and exposed outside, and the lithium battery assembly is rapidly cooled, so that the risks of combustion and explosion caused by long-time high temperature of the lithium battery assembly in the use process are effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle batteries, and in particular to an emergency cooling device for an electric vehicle power battery. Background Art

[0002] Compared with fuel vehicles, pure electric vehicles have four major components: drive motor, speed controller, power battery, and on-board charger. Compared with gas stations, they have public ultra-fast charging stations. The quality difference of pure electric vehicles depends on these four major components, and their value also depends on the quality of these four major components. The purpose of pure electric vehicles is also directly related to the selection and configuration of the four major components.

[0003] Existing electric vehicle power batteries have a shell, a top cover and a lithium battery assembly. After installation, a heat dissipation structure is usually set on the side or bottom of the shell, such as a fan, to dissipate heat from the inside of the shell. However, in actual use, since the lithium battery assembly is enclosed in the shell and the top cover, the heat dissipation efficiency of the heat dissipation structure alone is low, and the lithium battery assembly is prone to heat up. When the lithium battery assembly heats up and is above 60°C for a long time, there is a risk of combustion or even explosion. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the existing emergency cooling device for power batteries of electric vehicles, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide an emergency cooling device for electric vehicle power batteries, which can monitor the temperature of lithium battery assemblies during use, and unfold and expose the lithium battery assemblies when the temperature of the lithium battery assemblies is too high, and quickly cool down the lithium battery assemblies, effectively preventing the risk of combustion and explosion caused by long-term high temperature of the lithium battery assemblies during use.

[0007] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] An emergency cooling device for a power battery of an electric vehicle, comprising:

[0009] A housing, a mounting frame is mounted on the top of the housing, a battery rack is mounted inside the mounting frame, a plurality of lithium battery packs are arranged inside the battery rack, and an air flow slot is opened at the bottom of the battery rack;

[0010] A folding closed structure, comprising a lifting frame slidably connected to the inside of the shell and a top cover connected to the top of the shell, wherein there is a mounting frame between the lifting frame and the top cover, and in an initial state, the mounting frame is located inside the top cover, and the top of the top cover abuts against the bottom of the top cover;

[0011] A heat dissipation component, mounted on the side wall of the housing, for dissipating heat inside the housing;

[0012] A high temperature driving assembly, comprising a water tank installed on the top of the top cover, a driving part installed inside the top cover and connected to the water tank, and a connecting part installed inside the top cover and connected to the driving part, wherein the connecting part is connected to the housing;

[0013] A rapid cooling assembly, comprising an air compression assembly installed inside the top cover and connected to the shell, and a refrigeration assembly installed inside the top cover and connected to the air compression assembly;

[0014] Among them, when the temperature of the lithium battery pack is too high, the liquid inside the water tank boils, the internal pressure of the water tank increases and drives the connecting part through the driving part to push the top cover to move upward, and when the top cover moves upward, it drives the lifting frame to move downward, and when the lifting frame moves downward, it drives the rapid cooling component to blow cold air toward the battery rack to cool the lithium battery pack and the water tank until the temperature of the liquid inside the water tank drops, the internal pressure of the water tank decreases, and the lifting frame and the top cover move to reset.

[0015] As a preferred solution of the emergency cooling device for electric vehicle power batteries described in the present invention, it is composed of two staggered connecting plates, the center positions of the two connecting plates are rotatably connected by an axle rod, the tops of the two connecting plates are slidably connected to the side walls of the top cover, the bottoms of the two connecting plates are slidably connected to the side walls of the lifting frame, and the axle rod is rotatably connected to the side walls of the battery rack.

[0016] As a preferred solution of the emergency cooling device for electric vehicle power batteries described in the present invention, a support rod is installed at the bottom of the mounting frame, the other end of the support rod extends into the interior of the shell and is installed with a bottom support frame, the bottom of the bottom support frame is connected to the bottom of the shell, and the bottom of the battery frame has a sloped surface.

[0017] As a preferred solution of the emergency cooling device for electric vehicle power battery of the present invention, the symmetrical side walls of the shell are provided with ventilation grooves;

[0018] The heat dissipation assembly includes two third fixed plates symmetrically installed on the side walls of the shell and a reciprocating wire block located between the two third fixed plates, wherein a motor is installed on the side wall of one of the third fixed plates, the output end of the motor extends between the two third fixed plates and is installed with a reciprocating screw rod, the reciprocating wire block is connected to the reciprocating screw rod, a fan is rotatably connected inside the reciprocating wire block, and an independent driving source is provided inside the reciprocating wire block, and the driving source is connected to the fan.

[0019] As a preferred solution of the emergency cooling device for the power battery of an electric vehicle described in the present invention, the driving part includes a first pressure tube installed inside the top cover and a first piston located inside the first pressure tube, a connecting pipe is installed on the side wall of the first pressure tube, and the other end of the connecting pipe is connected to the water tank, a tension spring is installed on the side wall of the first piston, and the other end of the tension spring is connected to the inner wall of the first pressure tube, an extension plate is installed on the side wall of the first piston, a guide groove is opened on the top of the extension plate, and a rack is installed inside the guide groove.

[0020] As a preferred solution of the emergency cooling device for the power battery of an electric vehicle described in the present invention, a first fixing plate is installed on the side wall of the shell, a fixing rod is installed on the top of the first fixing plate, a threaded hole is opened on the top of the fixing rod, and the connecting part includes a fourth fixing plate installed on the side wall of the top cover and a third gear rotatably connected to the top of the top cover, a second pulley is rotatably connected to the top of the fourth fixing plate, the second pulley and the third gear are connected by a belt, a threaded rod is rotatably connected to the bottom of the fourth fixing plate, the threaded rod and the second pulley are coaxially fixedly connected, and the threaded rod rotates and extends into the threaded hole.

[0021] As a preferred solution of the emergency cooling device for electric vehicle power battery described in the present invention, a one-way rack is installed on the inner wall of the shell, a one-way gear is rotatably connected to the side wall of the lifting frame, the one-way gear is meshed with the one-way rack, a cam plate is rotatably connected inside the lifting frame, the cam plate and the one-way gear are coaxially fixedly connected, and an eccentric shaft is installed inside the cam plate;

[0022] The air compression assembly includes a second pressure tube installed on the inner wall of the lifting frame and a second piston located inside the second pressure tube, a first air pipe is installed at the bottom of the second pressure tube, a second air pipe is installed on the side wall of the second pressure tube, a first one-way valve is installed on the first air pipe body, a second one-way valve is installed on the second air pipe body, a vertical plate is installed on the top of the second piston, a horizontal plate is installed on the top of the vertical plate, a second guide groove is opened on the side wall of the horizontal plate, and the eccentric shaft is slidably connected inside the second guide groove.

[0023] As a preferred solution of the emergency cooling device for electric vehicle power battery described in the present invention, the refrigeration component includes an air chamber installed inside the lifting frame, a vortex tube installed at the tail of the air chamber and a cold air pipe installed at the front end of the air chamber, an air inlet channel is installed at the bottom of the air chamber, an air inlet hole is opened at the bottom of the air inlet channel, the other end of the first air pipe is connected to the air inlet hole, the tail end of the vortex tube has a baffle, the front end of the baffle is installed with a protrusion, the side wall of the baffle is opened around the protrusion with a plurality of escape holes, a shunt pipe is installed at the front end of the cold air pipe, the shunt pipe is bent to the top of the air chamber, and the shunt pipe body is installed with a plurality of air outlets, and the air outlets face the battery rack.

[0024] As a preferred solution of the emergency cooling device for electric vehicle power battery described in the present invention, a first pulley is installed on the side wall of the cam disk, a second fixed plate is installed on the side wall of the lifting frame, the side wall of the second fixed plate is rotatably connected to the first gear, the first pulley is connected to the first gear by a belt, and a second gear is installed on the reciprocating screw rod body at a position corresponding to the first gear.

[0025] Compared with the prior art: a folding closed structure, namely a top cover and a lifting frame, is arranged on the top of the shell, the lithium battery assembly is located inside the top cover and is closed and protected by the lifting frame and the shell, a high-temperature driving assembly is arranged inside the top cover, and a rapid cooling assembly is arranged inside the lifting frame, the water tank in the high-temperature driving assembly is fitted with the lithium battery assembly, and when the temperature of the lithium battery assembly rises to ° C, the high temperature causes the liquid inside the water tank to boil and quickly pressurizes the inside of the water tank, and the pressure is released outward to drive the top cover to move upward, and drives the lifting frame to move downward, so that the lithium battery assembly is exposed to the outside, and when the lifting frame moves downward, it drives the rapid cooling assembly to quickly dissipate heat and cool the lithium battery assembly and the water tank, until the temperature of the liquid inside the water tank drops, the pressure inside the water tank decreases, and the top cover and the lifting frame are reset, and the lithium battery assembly is protected again, and the temperature of the lithium battery assembly can be monitored during use, and when the temperature of the lithium battery assembly is too high, it can be unfolded and the lithium battery assembly is exposed to the outside, and the lithium battery assembly can be quickly cooled, effectively preventing the risk of combustion and explosion caused by long-term high temperature of the lithium battery assembly during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1This is an overall structural diagram of an emergency cooling device for electric vehicle power battery of the present invention;

[0028] Figure 2 This is a structural schematic diagram of an emergency cooling device for a power battery of an electric vehicle in an unfolded state according to the present invention;

[0029] Figure 3 This is a schematic diagram of a folding and closed structure of an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0030] Figure 4 This is a structural diagram of a driving part of an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0031] Figure 5 This is a diagram showing the internal structure of a lifting frame of an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0032] Figure 6 This invention is an emergency cooling device for electric vehicle power battery Figure 5 Structure diagram at A in the middle;

[0033] Figure 7 This is a structural diagram of an air compression component of an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0034] Figure 8 This is a structural diagram of a refrigeration component of an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0035] Fig. 9 This is a structural diagram of a heat dissipation component of an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0036] Fig.10 This is a structural diagram of a mounting frame for an emergency cooling device for a power battery of an electric vehicle according to the present invention;

[0037] Fig.11 This is a diagram showing the internal structure of a housing of an emergency cooling device for a power battery of an electric vehicle according to the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] The present invention provides an emergency cooling device for electric vehicle power batteries, which can monitor the temperature of a lithium battery assembly during use, and when the temperature of the lithium battery assembly is too high, unfold the device to expose the lithium battery assembly to the outside, and quickly cool the lithium battery assembly, effectively preventing the risk of combustion and explosion caused by the long-term high temperature of the lithium battery assembly during use.

[0042] Example 1

[0043] Figure 1-5 The structure diagram of the first embodiment of the emergency cooling device for electric vehicle power battery of the present invention is shown. Figure 1-Figure 5 In this embodiment, an emergency cooling device for a power battery of an electric vehicle includes a shell 100, a folding closed structure 200, a heat dissipation component 300, a high-temperature driving component 400 and a rapid cooling component 500.

[0044] A mounting frame 110 is installed on the top of the shell 100, and a battery rack 120 is installed inside the mounting frame 110. The battery rack 120 has multiple lithium battery packs 120a inside. An air flow groove 120b is opened at the bottom of the battery rack 120. Air enters the battery rack 120 through the air flow groove 120b and dissipates heat for the lithium battery packs 120a.

[0045] The folding closed structure 200 includes a lifting frame 210 slidably connected to the inside of the shell 100 and a top cover 220 connected to the top of the shell 100, and there is 230 between the lifting frame 210 and the top cover 220. In the initial state, the mounting frame 110 is located inside the top cover 220, and the top of the top cover 220 abuts against the bottom of the top cover 220. The lifting frame 210, the top cover 220 and the shell 100 form a closed structure to protect the lithium battery pack 120a. When the lifting frame 210 moves upward, the lifting frame 210 pushes the top cover 220 downward through 230 and is collected into the inside of the shell 100.

[0046] The heat dissipation assembly 300 is mounted on the side wall of the housing 100 to dissipate heat inside the housing 100 .

[0047] The high-temperature drive assembly 400 includes a water tank 410 installed on the top of the top cover 220, a drive unit 420 installed inside the top cover 220 and connected to the water tank 410, and a connection unit 430 installed inside the top cover 220 and connected to the drive unit 420. The connection unit 430 is connected to the shell 100. In the initial state, the water tank 410 fits the lithium battery pack 120a, and the inside of the water tank 410 is filled with a liquid with a low boiling point, such as hexadiene, vinyl iodide or diethylamine. When the temperature of the lithium battery pack 120a rises, the lithium battery pack 120a heats the liquid at the bottom of the water tank 410, and the heated liquid moves upward, and the colder liquid at the top moves downward to the bottom, which can dissipate heat to the lithium battery pack 120a to a certain extent. When the liquid in the water tank 410 continues to heat up and boils, the internal pressure of the water tank 410 increases, and the drive unit 420 drives the connection unit 430 to drive the top cover 220 to move upward.

[0048] The rapid cooling assembly 500 includes an air compression assembly 510 installed inside the top cover 220 and connected to the shell 100, and a refrigeration assembly 520 installed inside the top cover 220 and connected to the air compression assembly 510. When the lifting frame 210 moves downward, it drives the rapid cooling assembly 500 to generate cold air, and the cold air quickly dissipates heat and cools the lithium battery pack 120a and the water tank 410 through the air flow groove 120b.

[0049] Combination Figure 1-Figure 5 In this embodiment, an emergency cooling device for a power battery of an electric vehicle generates heat when the lithium battery pack 120a is in use, which drives the liquid in the water tank 410 to heat up. After the liquid in the water tank 410 is heated to boiling, the driving part 420 drives the connecting part 430 to drive the top cover 220 to move upward. When the top cover 220 moves upward, it drives the lifting frame 210 to move downward, so that the battery rack 120 and the lithium battery pack 120a are exposed to the air. During the downward movement of the lifting frame 210, it drives the rapid cooling component 500 to generate cold air. The cold air quickly cools the lithium battery pack 120a and the water tank 410 until the liquid in the water tank 410 is cooled, the internal pressure of the water tank 410 is reduced, and the lifting frame 210 and the top cover 220 move to reset.

[0050] Example 2

[0051] Figure 1-11 The structure diagram of the second embodiment of the emergency cooling device for electric vehicle power battery of the present invention is shown. Figure 1-Figure 11 , which is different from the above-mentioned embodiment, an emergency cooling device for electric vehicle power battery in this embodiment further includes:

[0052] 230 is composed of two staggered connecting plates, the center positions of the two connecting plates are rotatably connected by an axle rod, the tops of the two connecting plates are slidably connected to the side walls of the top cover 220, the bottoms of the two connecting plates are slidably connected to the side walls of the lifting frame 210, the axle rod 230 is rotatably connected to the side walls of the battery rack 120, a support rod 110a is installed at the bottom of the mounting frame 110, the other end of the support rod 110a extends into the interior of the shell 100 and is installed with a bottom support frame 110b, the bottom of the bottom support frame 110b is connected to the bottom of the shell 100, and the bottom of the battery rack 120 has a slope surface 120b-1.

[0053] The heat dissipation assembly 300 includes two third fixing plates 310 symmetrically mounted on the side walls of the housing 100 and a reciprocating wire block 320 located between the two third fixing plates 310, wherein a motor 310a is mounted on the side wall of one of the third fixing plates 310, the output end of the motor 310a extends between the two third fixing plates 310 and is mounted with a reciprocating screw rod 310a-1, the reciprocating wire block 320 is connected to the reciprocating screw rod 310a-1, the reciprocating wire block 320 is rotatably connected to a fan 320a, the reciprocating wire block 320 has an independent driving source inside, the driving source is connected to the fan 320a, and the symmetrical side walls of the housing 100 are provided with a motor 310a. A ventilation groove 130 is opened on the wall, and the reciprocating screw 310a-1 and the second gear 310a-2 are driven to rotate by starting the motor 310a. When the reciprocating screw 310a-1 rotates, the screw structure is used to push the reciprocating wire block 320 and the fan 320a to move back and forth along the side wall of the shell 100. At the same time, the independent driving source inside the reciprocating wire block 320 is started to drive the fan 320a to rotate. When the fan 320a rotates, airflow is generated. The airflow enters the interior of the shell 100 through the ventilation groove 130, entrains the heat inside the shell 100, and is discharged through the ventilation groove 130 at the other end, thereby dissipating the heat inside the shell 100.

[0054] The driving unit 420 includes a first pressure tube 420a installed inside the top cover 220 and a first piston 420b located inside the first pressure tube 420a. A connecting tube 420a-1 is installed on the side wall of the first pressure tube 420a. The other end of the connecting tube 420a-1 is connected to the water tank 410. A tension spring 420b-1 is installed on the side wall of the first piston 420b. The other end of the tension spring 420b-1 is connected to the inner wall of the first pressure tube 420a. An extension plate 420c is installed on the side wall of the first piston 420b. A guide groove 420c-1 is opened on the top of the extension plate 420c. A rack 420c-2 is installed inside the guide groove 420c-1. A first fixing plate 140 is installed on the side wall of the shell 100. A fixing rod 140a is installed on the top of the top cover 220, and a threaded hole 140a-1 is opened on the top of the fixing rod 140a. The connecting part 430 includes a fourth fixing plate 430a installed on the side wall of the top cover 220 and a third gear 430b rotatably connected to the top of the top cover 220. The top of the fourth fixing plate 430a is rotatably connected to the second pulley 430a-1, and the second pulley 430a-1 is connected to the third gear 430b through a belt. The bottom of the fourth fixing plate 430a is rotatably connected to a threaded rod 430a-2, and the threaded rod 430a-2 is coaxially fixedly connected to the second pulley 430a-1. The threaded rod 430a-2 rotates and extends into the threaded hole 140a-1. When the liquid in the water tank 410 boils, After that, the internal pressure of the water tank 410 increases, and the water vapor enters the first pressure tube 420a through the connecting tube 420a-1 and pushes the first piston 420b to move to the outside of the first pressure tube 420a and pulls the tension spring 420b-1. When the first piston 420b drives the extension plate 420c to move, the rack 420c-2 drives the third gear 430b to rotate, and the third gear 430b drives the second pulley 430a-1 and the threaded rod 430a-2 to rotate through the belt. When the threaded rod 430a-2 rotates, the screw rod structure is used to push the top cover 220 to move upward. When the top cover 220 moves upward, the tops of the two connecting plates 230 slide along the side walls of the top cover 220 and approach each other, and the bottoms of the two connecting plates 230 are connected. The parts slide along the side wall of the lifting frame 210 and approach each other, squeezing and pushing the lifting frame 210 to move downward, the lifting frame 210 is separated from the top cover 220, and the battery rack 120 and the lithium battery pack 120a are exposed to the air. When the liquid inside the water tank 410 cools down, the internal pressure of the water tank 410 decreases. Affected by gravity and rebounding with the tension spring 420b-1, the first piston 420b moves toward the inside of the first pressure tube 420a, and the rack 420c-2 drives the third gear 430b and the threaded rod 430a-2 to reverse, and the top cover 220 moves downward. At the same time, the lifting frame 210 is pulled upward by 230 until the lifting frame 210 and the top cover 220 are reset, and the lifting frame 210, the top cover 220 and the shell 100 are closed.

[0055] The air compression assembly 510 includes a second pressure tube 510a installed on the inner wall of the lifting frame 210 and a second piston 510b located inside the second pressure tube 510a. A one-way rack 150 is installed on the inner wall of the housing 100. A one-way gear 210a is rotatably connected to the side wall of the lifting frame 210. The one-way gear 210a is meshed with the one-way rack 150. A cam plate 210a-1 is rotatably connected inside the lifting frame 210. The cam plate 210a-1 and the one-way gear 210a are coaxially fixedly connected. An eccentric shaft 210a-2 is installed inside the cam plate 210a-1. A first air pipe 510 is installed at the bottom of the second pressure tube 510a. a-1, a second air pipe 510a-2 is installed on the side wall of the second pressure pipe 510a, a first one-way valve 510a-3 is installed on the body of the first air pipe 510a-1, a second one-way valve 510a-4 is installed on the body of the second air pipe 510a-2, a vertical plate 510b-1 is installed on the top of the second piston 510b, a horizontal plate 510b-2 is installed on the top of the vertical plate 510b-1, a second guide groove 510b-3 is opened on the side wall of the horizontal plate 510b-2, and the eccentric shaft 210a-2 is slidably connected to the inside of the second guide groove 510b-3. The refrigeration assembly 520 includes an air chamber 520a installed inside the lifting frame 210, an installation The vortex tube 520b at the tail of the air chamber 520a and the cold air pipe 520c installed at the front end of the air chamber 520a, the air chamber 520a is provided with an air inlet channel 520a-1 at the bottom, the air inlet channel 520a-1 is provided with an air inlet hole 520a-2 at the bottom, the other end of the first air pipe 510a-1 is connected to the air inlet hole 520a-2, the vortex tube 520b has a baffle 520b-1 at the tail end, a bump 520b-2 is installed at the front end of the baffle 520b-1, and a plurality of escape holes 520b-3 are provided on the side wall of the baffle 520b-1 around the bump 520b-2, and a shunt pipe 520c-1 is installed at the front end of the cold air pipe 520c. The shunt pipe 520c-1 is bent to the top of the air chamber 520a, and the shunt pipe 520c-1 is installed with a plurality of air outlets 520c-2, and the air outlets 520c-2 face the battery rack 120. The side wall of the cam plate 210a-1 is installed with a first pulley 210a-3, and the side wall of the lifting frame 210 is installed with a second fixed plate 210b. The side wall of the second fixed plate 210b is rotatably connected with a first gear 210b-1. The first pulley 210a-3 is connected to the first gear 210b-1 through a belt, and the reciprocating screw 310a-1 is installed with a second gear 310a-2 at the corresponding position of the rod body and the first gear 210b-1.When the lifting frame 210 moves downward, the one-way rack 150 drives the one-way gear 210a to rotate, and the one-way gear 210a drives the cam plate 210a-1 and the eccentric shaft 210a-2 to rotate, and the eccentric shaft 210a-2 slides along the inside of the second guide groove 510b-3, thereby driving the vertical plate 510b-1 and the second piston 510b to move up and down. When the second piston 510b moves upward, the first one-way valve 510a-3 is closed, and the second one-way valve 510a-4 is opened. The air enters the second pressure pipe 510a through the second air pipe 510a-2. When the second piston 510b moves downward, the first one-way valve 510a-3 is opened. , the second one-way valve 510a-4 is closed, and the air inside the second pressure tube 510a is compressed and enters the air inlet channel 520a-1 through the first air pipe 510a-1. The air inlet channel 520a-1 has a certain angle with the inside of the air chamber 520a. When the compressed air enters the air chamber 520a through the air inlet channel 520a-1, the compressed air rotates along the inside of the air chamber 520a and the vortex tube 520b. When the air rotates along the inside of the vortex tube 520b, the angular velocity of the outer circle air is lower and the angular velocity of the inner circle air flow is larger, and friction occurs between the inner and outer circle air flows, and the gas internal energy of the inner circle vortex is continuously converted into rotational kinetic energy. As the gas internal energy of the inner circle vortex is reduced, the inner circle The vortex temperature decreases, and the outer circle airflow continuously obtains kinetic energy due to friction to maintain rotation. At the same time, the internal energy of the gas continues to increase, causing the temperature to rise. When the air moves to the baffle 520b-1, the outer circle hot air flow is discharged through the escape hole 520b-3, and the inner circle cold air is blocked by the protrusion 520b-2. As the pressure of the inner circle cold air increases, the inner circle cold air flows back and flows into the shunt pipe 520c-1 through the cold air pipe 520c. The cold air inside the shunt pipe 520c-1 blows upward to the airflow groove 120b through the air outlet 520c-2, and passes through the airflow groove 120b along the slope surface 120b-1, so as to quickly cool the lithium battery pack 120a and the water tank 410. As the top cover 220 moves downward until the first gear 210b-1 meshes with the second gear 310a-2, the one-way gear 210a is separated from the one-way rack 150, and the second gear 310a-2 drives the first gear 210b-1 to rotate. The first gear 210b-1 uses a belt to drive the first pulley 210a-3 and the eccentric shaft 210a-2 to rotate, driving the second piston 510b to continue to move up and down inside the second pressure tube 510a until the liquid inside the water tank 410 is cooled and the pressure inside the water tank 410 is reduced. The top cover 220 moves downward to drive the lifting frame 210 to move upward, and the first gear 210b-1 is separated from the second gear 310a-2.

[0056] Combination Figure 1-Figure 11In the embodiment of the present invention, an emergency cooling device for a power battery of an electric vehicle is used. In actual use, the reciprocating screw rod 310a-1 is driven to rotate by starting the motor 310a, and the reciprocating screw block 320 and the fan 320a are driven to move. The driving source inside the reciprocating screw block 320 drives the fan 320a to rotate to generate airflow to dissipate heat inside the shell 100. When the temperature of the lithium battery pack 120a rises to a certain threshold, the liquid inside the water tank 410 boils, and the pressure inside the water tank 410 rises. The water vapor enters the first pressure pipe 420a through the connecting pipe 420a-1 and drives the first piston 420b and the rack 420c-2 to move. The rack 420c-2 drives the third gear 430b and the threaded rod 430a-2 to rotate, pushing the top cover 220 to move upward, and the top cover 220 When moving upward, 230 drives the lifting frame 210 to move downward. When the lifting frame 210 moves downward, the one-way rack 150 drives the one-way gear 210a and the eccentric shaft 210a-2 to rotate, driving the second piston 510b to move up and down inside the second pressure tube 510a, and delivering compressed air to the air chamber 520a and the vortex tube 520b. The compressed air rotates inside the vortex tube 520b and is converted into cold air. After that, it enters the shunt tube 520c-1 through the cold air pipe 520c, and is blown to the air flow groove 120b through the air outlet 520c-2, so as to quickly cool the lithium battery pack 120a and the water tank 410. When the liquid inside the water tank 410 is cooled, the pressure inside the water tank 410 is reduced, and the top cover 220 moves downward to drive the lifting frame 210 to move upward and reset.

[0057] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An emergency cooling device for electric vehicle power batteries, characterized in that: include: A housing (100), wherein a mounting frame (110) is mounted on the top of the housing (100), a battery rack (120) is mounted inside the mounting frame (110), a plurality of lithium battery packs (120a) are arranged inside the battery rack (120), and an air flow groove (120b) is provided at the bottom of the battery rack (120); The folding closed structure (200) comprises a lifting frame (210) slidably connected to the inside of the shell (100) and a top cover (220) connected to the top of the shell (100), wherein there is a 230 between the lifting frame (210) and the top cover (220), and in an initial state, the mounting frame (110) is located inside the top cover (220), and the top of the top cover (220) abuts against the bottom of the top cover (220); A heat dissipation component (300) is mounted on a side wall of the housing (100) and is used to dissipate heat inside the housing (100); A high-temperature driving assembly (400) comprises a water tank (410) installed at the top of the top cover (220), a driving unit (420) installed inside the top cover (220) and connected to the water tank (410), and a connecting unit (430) installed inside the top cover (220) and connected to the driving unit (420), wherein the connecting unit (430) is connected to the housing (100); A rapid cooling assembly (500) comprising an air compression assembly (510) installed inside the top cover (220) and connected to the housing (100) and a refrigeration assembly (520) installed inside the top cover (220) and connected to the air compression assembly (510); When the temperature of the lithium battery pack (120a) is too high, the liquid inside the water tank (410) boils, the pressure inside the water tank (410) increases, and the driving part (420) drives the connecting part (430) to push the top cover (220) to move upward. When the top cover (220) moves upward, it drives the lifting frame (210) to move downward. When the lifting frame (210) moves downward, it drives the rapid cooling component (500) to blow cold air toward the battery rack (120), so as to cool the lithium battery pack (120a) and the water tank (410), until the temperature of the liquid inside the water tank (410) drops, the pressure inside the water tank (410) decreases, and the lifting frame (210) and the top cover (220) move to reset.

2. An emergency cooling device for electric vehicle power battery according to claim 1, characterized in that: The 230 is composed of two staggered connecting plates, the center positions of the two connecting plates are rotatably connected by an axle, the tops of the two connecting plates are slidably connected to the side walls of the top cover (220), the bottoms of the two connecting plates are slidably connected to the side walls of the lifting frame (210), and the axle of the 230 is rotatably connected to the side walls of the battery rack (120).

3. The emergency cooling device for electric vehicle power battery according to claim 1, characterized in that: A support rod (110a) is installed at the bottom of the mounting frame (110), the other end of the support rod (110a) extends into the interior of the shell (100) and is installed with a bottom support frame (110b), the bottom of the bottom support frame (110b) is connected to the bottom of the shell (100), and the bottom of the battery frame (120) has a slope surface (120b-1).

4. The emergency cooling device for electric vehicle power battery according to claim 1, characterized in that: The symmetrical side walls of the housing (100) are provided with ventilation grooves (130); The heat dissipation component (300) comprises two third fixing plates (310) symmetrically mounted on the side walls of the shell (100) and a reciprocating wire block (320) located between the two third fixing plates (310), wherein a motor (310a) is mounted on the side wall of one of the third fixing plates (310), an output end of the motor (310a) extends between the two third fixing plates (310) and is mounted with a reciprocating screw rod (310a-1), the reciprocating wire block (320) is connected to the reciprocating screw rod (310a-1), a fan (320a) is rotatably connected inside the reciprocating wire block (320), and an independent driving source is provided inside the reciprocating wire block (320), and the driving source is connected to the fan (320a).

5. The emergency cooling device for electric vehicle power battery according to claim 1, characterized in that: The driving part (420) comprises a first pressure tube (420a) installed inside the top cover (220) and a first piston (420b) located inside the first pressure tube (420a); a connecting tube (420a-1) is installed on the side wall of the first pressure tube (420a); the other end of the connecting tube (420a-1) is connected to the water tank (410); a tension spring (420b-1) is installed on the side wall of the first piston (420b); the other end of the tension spring (420b-1) is connected to the inner wall of the first pressure tube (420a); an extension plate (420c) is installed on the side wall of the first piston (420b); a guide groove (420c-1) is opened on the top of the extension plate (420c); a rack (420c-2) is installed inside the guide groove (420c-1).

6. The emergency cooling device for electric vehicle power battery according to claim 1, characterized in that: The side wall of the housing (100) is mounted with a first fixing plate (140), the top of the first fixing plate (140) is mounted with a fixing rod (140a), the top of the fixing rod (140a) is provided with a threaded hole (140a-1), the connecting portion (430) comprises a fourth fixing plate (430a) mounted on the side wall of the top cover (220) and a third gear (430b) rotatably connected to the top of the top cover (220), the fourth fixing plate (430a) A second pulley (430a-1) is rotatably connected to the top, and the second pulley (430a-1) is connected to the third gear (430b) via a belt. A threaded rod (430a-2) is rotatably connected to the bottom of the fourth fixed plate (430a), and the threaded rod (430a-2) is coaxially fixedly connected to the second pulley (430a-1), and the threaded rod (430a-2) is rotatably extended into the threaded hole (140a-1).

7. The emergency cooling device for electric vehicle power battery according to claim 1, characterized in that: A one-way rack (150) is installed on the inner wall of the housing (100); a one-way gear (210a) is rotatably connected to the side wall of the lifting frame (210); the one-way gear (210a) is meshed with the one-way rack (150); a cam plate (210a-1) is rotatably connected inside the lifting frame (210); the cam plate (210a-1) and the one-way gear (210a) are coaxially fixedly connected; an eccentric shaft (210a-2) is installed inside the cam plate (210a-1); The air compression assembly (510) comprises a second pressure tube (510a) installed on the inner wall of the lifting frame (210) and a second piston (510b) located inside the second pressure tube (510a); a first air tube (510a-1) is installed at the bottom of the second pressure tube (510a); a second air tube (510a-2) is installed on the side wall of the second pressure tube (510a); a first one-way valve (510a-2) is installed on the body of the first air tube (510a-1); a-3), the second air pipe (510a-2) is provided with a second one-way valve (510a-4), the second piston (510b) is provided with a vertical plate (510b-1) on the top, the vertical plate (510b-1) is provided with a horizontal plate (510b-2) on the top, the horizontal plate (510b-2) is provided with a second guide groove (510b-3) on the side wall, and the eccentric shaft (210a-2) is slidably connected inside the second guide groove (510b-3).

8. The emergency cooling device for electric vehicle power battery according to claim 7, characterized in that: The refrigeration assembly (520) comprises an air chamber (520a) installed inside the lifting frame (210), a vortex tube (520b) installed at the rear of the air chamber (520a), and a cold air pipe (520c) installed at the front of the air chamber (520a); an air inlet channel (520a-1) is installed at the bottom of the air chamber (520a); an air inlet hole (520a-2) is opened at the bottom of the air inlet channel (520a-1); the other end of the first air pipe (510a-1) is connected to the air inlet hole (520a-2); the rear end of the vortex tube (520b) has a baffle The baffle (520b-1) is provided with a protrusion (520b-2) at the front end of the baffle (520b-1), and a plurality of escape air holes (520b-3) are provided on the side wall of the baffle (520b-1) around the protrusion (520b-2). A shunt pipe (520c-1) is provided at the front end of the cold air pipe (520c), and the shunt pipe (520c-1) is bent to the top of the air chamber (520a). A plurality of air outlets (520c-2) are provided on the body of the shunt pipe (520c-1), and the air outlets (520c-2) face the battery rack (120).

9. The emergency cooling device for electric vehicle power battery according to claim 7, characterized in that: A first pulley (210a-3) is installed on the side wall of the cam plate (210a-1), a second fixed plate (210b) is installed on the side wall of the lifting frame (210), a first gear (210b-1) is rotatably connected to the side wall of the second fixed plate (210b), the first pulley (210a-3) and the first gear (210b-1) are connected via a belt, and a second gear (310a-2) is installed at a position corresponding to the first gear (210b-1) on the rod body of the reciprocating screw rod (310a-1).

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