A new energy vehicle battery cooling device

Abstract

The present invention relates to the technical field of heat dissipation devices, specifically a heat dissipation device for a battery of a new energy vehicle, comprising a battery shell, one end of the battery shell is connected to a mounting shell, a filter plate is arranged between the mounting shell and the battery shell; a mounting block is arranged inside the mounting shell, the middle part of the mounting block is rotatably connected to a rotating shaft, one end of the rotating shaft passes through the mounting block, a side of the mounting block away from the battery shell has a first air outlet channel, a fan blade installed on the rotating shaft is arranged inside the mounting block, and a driving unit fixed on the mounting shell is arranged on the side of the mounting block away from the battery shell. The present invention realizes the use of airflow and heat dissipated by lithium batteries as driving force for the fan blades, thereby better driving the air to accelerate the flow and achieve the effect of heat dissipation of lithium batteries, solving the common problem that heat dissipation of lithium batteries requires its own electricity to drive the fan to dissipate heat, effectively increasing the service life of lithium batteries and reducing the load on lithium batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation devices, and in particular to a heat dissipation device for a battery of a new energy vehicle. Background Art

[0002] Battery packs and lithium batteries are used in power supply systems in various fields. With the rise of new energy electric vehicles, more and more people choose electric vehicles for travel. Their environmental friendliness is also particularly outstanding. The battery of an electric vehicle has become one of the important indicators for measuring the performance of an automobile. Due to the dense arrangement of automobile battery packs, large input and output power, and the fact that the batteries are often buried inside the car, the battery body becomes more heated. If the battery works at high temperature for a long time, it will not only affect the life of the battery itself, but also the performance of the entire electric vehicle. Moreover, if the temperature is too high, the electric vehicle will spontaneously combust, leading to damage and property loss, posing a serious threat to personal safety.

[0003] In the patent with the authorization announcement number CN219843046U, a new energy vehicle battery heat dissipation device is disclosed, including a heat-conducting box body, the heat-conducting box body is filled with heat-conducting liquid, a plurality of battery packs are arranged inside the heat-conducting box body, a heat-conducting rod group is arranged between two adjacent battery packs, a heat-dissipating fin is arranged on the outside of the heat-conducting box body, a heat-dissipating fan is arranged on the outside of the heat-dissipating fin, and the heat-dissipating device drives the heat-dissipating fan through the power supply to dissipate the heat on the heat-dissipating fin. However, the heat-dissipating fan used in the prior art will consume the power of the lithium battery when working, thereby shortening the service life of the lithium battery and increasing the load of the battery. Among them, the driver of the heat-dissipating fan itself will also emit heat during the working process, resulting in low heat dissipation efficiency of the lithium battery. Therefore, the present invention provides a new energy vehicle battery heat dissipation device to solve the above problems. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a new energy vehicle battery heat dissipation device to solve the problem that the cooling fan used in the above prior art consumes the power of the lithium battery when working, thereby shortening the service life of the lithium battery, increasing the battery load, and resulting in low heat dissipation efficiency of the lithium battery.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A new energy vehicle battery heat dissipation device comprises a battery shell, one end of the battery shell is connected to a mounting shell, a lithium battery is mounted in the battery shell, and a filter plate is arranged between the mounting shell and the battery shell;

[0007] A mounting block is installed inside the mounting shell, and a rotating shaft is rotatably connected to the middle part of the mounting block, one end of the rotating shaft passes through the mounting block, and the mounting block has a conical cavity on the side facing the battery shell, and a first air outlet channel is provided on the side of the mounting block away from the battery shell, and the first air outlet channel is connected to the conical cavity, and a fan installed on the rotating shaft is arranged inside the conical cavity, and a driving unit fixed to the mounting shell is arranged on the side of the mounting block away from the battery shell. When the car is moving, airflow is generated, and the airflow passes through the battery shell to take away the heat of the lithium battery and drives the lithium battery to rotate, so that the heat of the lithium battery is compressed and then the fan is driven to rotate through the driving unit.

[0008] Preferably, a plurality of mounting grooves are provided inside the conical cavity, and two adjacent conical cavities are connected by a connecting channel. The fan blades are located in the mounting grooves, and the number of the fan blades is equal to the number of the mounting grooves. The first air outlet channel is connected to the mounting groove at the tail end of the conical cavity.

[0009] Preferably, the diameters of the plurality of fan blades decrease successively from an end of the mounting block close to the battery shell to an end far from the battery shell.

[0010] Preferably, the fan piece includes a fixed plate, which is fixedly connected to the rotating shaft, and the side of the fixed plate facing the battery shell is connected to the fan blade, and the outer periphery of the fan blade is provided with an annular plate connected to the fixed plate, and a ventilation cavity is provided between the annular plate and the fixed plate.

[0011] Preferably, the driving unit includes a piston cylinder and a turntable, the piston cylinder is slidably fitted with a piston block inside, the piston block is hinged with a rotating arm at one end away from the piston cylinder, the turntable is fixedly connected to the end of the rotating shaft away from the mounting shell, the turntable is eccentrically connected to a mounting rod, and the mounting rod is rotatably connected to the rotating arm.

[0012] Preferably, a second air outlet channel located on the mounting block is provided below the first air outlet channel, the second air outlet channel is connected to the mounting groove at the tail end of the conical cavity, and the outlet end of the second air outlet channel is provided with a pressure valve connected to the mounting block.

[0013] Preferably, a scraper is provided on the side of the filter plate facing the battery shell, the scraper is in contact with the filter plate, and one end of the rotating shaft facing the battery shell passes through the filter plate and is connected to the scraper.

[0014] Preferably, a guide groove is provided on one side of the scraper, and the depth of the guide groove decreases gradually from the end farthest from the rotating shaft to the end close to the rotating shaft.

[0015] Preferably, the rotating shaft includes a first shaft and a second shaft, a slot is provided at one end of the first shaft facing the second shaft, a round rod is fixedly connected to one end of the second shaft facing the first shaft, the round rod is located in the slot, a torsion spring is fixedly connected between the slot and the round rod, a top ball is elastically provided on the circumferential direction of the second shaft, and a slot corresponding to the top ball is provided on the filter plate.

[0016] Preferably, four symmetrically arranged positioning grooves are provided inside the battery shell, and the inner cavity of the battery shell is circular. After the four corners of the lithium battery are respectively located in the four positioning grooves, an air flow channel is formed between the inner cavity of the battery shell and the lithium battery.

[0017] The beneficial effects of the present invention are:

[0018] 1. When the car is driving at high speed, after the air enters the battery shell, the heat on the lithium battery moves toward the mounting shell under the action of the airflow, and the hot air contacts the fan blades and drives the fan blades to rotate. At the same time, the fan blades compress the air to increase the temperature of the air. The air with increased temperature is transmitted to the drive unit through the first air outlet channel, thereby further driving the fan blades to rotate. The airflow and the heat dissipated by the lithium battery are used as the driving force of the fan blades, thereby better driving the air to accelerate the flow and achieve the effect of cooling the lithium battery. This solves the common problem that the heat dissipation of lithium batteries requires its own electricity to drive the fan to dissipate heat, effectively increases the service life of the lithium battery, and reduces the load on the lithium battery.

[0019] 2. After being compressed, the air contacts the piston cylinder through the first air outlet channel. The air in the piston cylinder is compressed by the piston block. The air in the piston cylinder expands when heated, causing the piston block to extend out of the piston cylinder, thereby causing the turntable to drive the shaft to rotate.

[0020] 3. After the filter plate filters the air, dust will adhere to the filter plate. The scraper driven by the rotating shaft can process the dust on the filter plate and discharge it through the discharge port to avoid clogging of the filter holes on the filter plate and affecting the air circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the heat dissipation device of the present invention from a first viewing angle.

[0022] Figure 2 Schematic diagram of the heat dissipation device of the present invention from a second viewing angle.

[0023] Figure 3 It is a cross-sectional schematic diagram of the heat dissipation device of the present invention.

[0024] Figure 4 It is a cross-sectional schematic diagram of the battery shell of the present invention.

[0025] Figure 5It is a side cross-sectional schematic diagram of the battery shell of the present invention.

[0026] Figure 6 It is a schematic diagram of the scraper of the present invention.

[0027] Figure 7 It is a schematic diagram of the interior of the installation shell of the present invention.

[0028] Figure 8 Schematic diagram of the drive unit of the present invention.

[0029] Fig. 9 It is a schematic diagram of the fan blade of the present invention.

[0030] Fig.10 It is a cross-sectional schematic diagram of the mounting block of the present invention.

[0031] Fig.11 It is a partial cross-sectional schematic diagram of the rotating shaft of the present invention.

[0032] In the figure: 1. battery case; 2. mounting case; 3. lithium battery; 4. rotating shaft; 5. Mounting block; 6. Drive unit; 101. First mounting plate; 102. Positioning plate; 103. Discharge port; 12. Positioning slot; 13. Filter plate; 131. Card slot; 14. Air flow channel; 201. Second mounting plate; 21. Hanging ring; 41. Turntable; 42. Scraper; 411. Mounting rod; 421. Guide slot; 401. First axis; 402. Second axis; 403. Round rod; 404. Slot; 405. Torsion spring; 406. Top ball; 51. First air outlet channel; 52. Second air outlet channel; 53. Conical cavity; 54. Mounting slot; 55. Fan blade; 511. Conical cover; 521. Pressure valve; 551. Fixing plate; 552. Fan blade; 553. Ring plate; 554. Ventilation cavity; 541. Connecting channel; 61. Piston cylinder; 62. Piston block; 63. Rotating arm. DETAILED DESCRIPTION

[0033] The following will refer to the attached Figures 1 to 11 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0034] A new energy vehicle battery cooling device, such as Figures 1 to 11As shown, it includes a battery shell 1, both sides of the battery shell 1 are fixedly connected with a positioning plate 102, the positioning plate 102 is arranged so that the battery shell 1 can be installed on the car, one end of the battery shell 1 is fixedly connected with a mounting shell 2, in detail, the mounting shell 2 and the battery shell 1 are connected by bolts, and the side of the mounting shell 2 away from the battery shell 1 is installed with a second mounting plate 201, and the second mounting plate 201 and the mounting shell 2 are connected by screws. The lithium battery 3 is installed in the battery shell 1, and the shell of the lithium battery 3 is made of heat-conducting material. A filter plate 13 is arranged between the mounting shell 2 and the battery shell 1, and the filter plate 13 can filter impurities in the air. In detail, the end of the battery shell 1 away from the mounting shell 2 is fixedly connected with a first mounting plate 101 by bolts, and the first mounting plate 101 is located toward the head of the car, and the first mounting plate 101 has an air inlet, and the air inlet facilitates airflow into the battery shell 1. Four symmetrically arranged positioning grooves 12 are provided inside the battery shell 1. The inner cavity of the battery shell 1 is circular. After the four corners of the lithium battery 3 are respectively located in the four positioning grooves 12, an air flow channel 14 is formed between the inner cavity of the battery shell 1 and the lithium battery 3. The air flow channel 14 facilitates the passage of air flow when the car moves at high speed and takes away the heat from the lithium battery 3.

[0035] A mounting block 5 is installed inside the mounting shell 2, and the middle part of the mounting block 5 is rotatably connected to the rotating shaft 4. In detail, the rotating shaft 4 and the mounting block 5 are connected by a bearing, and one end of the rotating shaft 4 passes through the mounting block 5. The mounting block 5 has a conical cavity 53 on the side facing the battery shell 1, and the mounting block 5 has a first air outlet channel 51 on the side away from the battery shell 1. The first air outlet channel 51 is connected to the conical cavity 53, and a fan piece 55 installed on the rotating shaft 4 is arranged inside the conical cavity 53. A driving unit 6 fixed on the mounting shell 2 is arranged on the side of the mounting block 5 away from the battery shell 1. When the car is moving, airflow is generated. The airflow passes through the battery shell 1 to take away the heat of the lithium battery 3 and drives the lithium battery 3 to rotate, so that the heat of the lithium battery 3 is compressed and then the fan piece 55 is driven to rotate through the driving unit 6.

[0036] A second air outlet channel 52 located on the mounting block 5 is provided below the first air outlet channel 51. The second air outlet channel 52 can prevent the air from flowing back due to excessive pressure inside the conical cavity 53. The second air outlet channel 52 is connected to the mounting groove 54 at the tail end of the conical cavity 53. A pressure valve 521 connected to the mounting block 5 is provided at the outlet end of the second air outlet channel 52. The pressure valve 521 can allow air to enter the first air outlet channel 51 first. When the pressure in the mounting groove 54 is greater than the pressure discharged from the first air outlet channel 51, the second air outlet channel 52 is opened by the pressure valve 521 to reduce the pressure.

[0037] Specifically, when the car is driving at high speed, after the air enters the battery shell 1, the heat on the lithium battery 3 moves toward the mounting shell 2 under the action of the airflow, and the hot air contacts the fan blades 55 and drives the fan blades 55 to rotate. At the same time, the fan blades 55 compress the air to increase the temperature of the air. The air with increased temperature is transmitted to the drive unit 6 through the first air outlet channel 51, thereby further driving the fan blades 55 to rotate, realizing the use of the airflow and the heat dissipated by the lithium battery 3 as the driving force of the fan blades 55, thereby better driving the air to accelerate the flow and achieve the effect of cooling the lithium battery 3, solving the common problem that the heat dissipation of the lithium battery 3 requires its own electricity to drive the fan to dissipate heat, effectively increasing the service life of the lithium battery 3 and reducing the load on the lithium battery 3.

[0038] like Figure 3 , Figure 7 and Fig.10 As shown, a plurality of mounting grooves 54 are provided inside the conical cavity 53, and two adjacent conical cavities 53 are connected through a connecting channel 541. The fan blades 55 are located in the mounting grooves 54, and the number of the fan blades 55 is equal to the number of the mounting grooves 54. The first air outlet channel 51 is connected to the mounting groove 54 at the rear end of the conical cavity 53. The diameters of the plurality of fan blades 55 decrease in sequence from the end of the mounting block 5 close to the battery shell 1 to the end far from the battery shell 1, and the plurality of fan blades 55 follow the shape of the conical cavity 53 to further compress the air.

[0039] Specifically, the arrangement of the plurality of fan blades 55 can further compress the air, thereby compressing the air and increasing its temperature to a preset temperature so as to enable the drive unit 6 to operate.

[0040] like Fig. 9 As shown, the fan piece 55 includes a fixed plate 551, which is fixedly connected to the rotating shaft 4. The fixed plate 551 is connected to the side of the battery shell 1 with a fan blade 552. The outer periphery of the fan blade 552 is provided with an annular plate 553 connected to the fixed plate 551. A ventilation cavity 554 is provided between the annular plate 553 and the fixed plate 551. The fan blade 552 can compress the air while guiding the air.

[0041] like Figure 3 and Figure 8As shown, the driving unit 6 includes a piston cylinder 61 and a turntable 41. The piston cylinder 61 is fixed to the mounting shell 2 by a hanging ring 21. The piston cylinder 61 is internally slidably fitted with a piston block 62. The end of the piston block 62 away from the piston cylinder 61 is hinged with a rotating arm 63. The turntable 41 is fixedly connected to the end of the rotating shaft 4 away from the mounting shell 2. A mounting rod 411 is eccentrically connected to the turntable 41. The mounting rod 411 is rotatably connected to the rotating arm 63. A conical cover 511 is fixedly connected to the outlet end of the first air outlet channel 51. The conical cover 511 corresponds to the end of the piston cylinder 61 away from the piston block 62. The conical cover 511 can make the compressed air accurately contact with the piston cylinder 61 to avoid excessive dispersion of the compressed air after being discharged from the first air outlet channel 51.

[0042] Specifically, after being compressed, the air contacts the piston cylinder 61 through the first air outlet channel 51. The air in the piston cylinder 61 is compressed by the piston block 62. The air in the piston cylinder 61 expands when heated, causing the piston block 62 to extend out of the piston cylinder 61, thereby causing the turntable 41 to drive the rotating shaft 4 to rotate.

[0043] like Figure 3 and Figure 6 As shown, a scraper 42 is provided on the side of the filter plate 13 facing the battery shell 1, and the scraper 42 contacts the filter plate 13. The end of the rotating shaft 4 facing the battery shell 1 passes through the filter plate 13 and is connected to the scraper 42. A guide groove 421 is provided on one side of the scraper 42, and the guide groove 421 can prevent the dust scraped from the filter plate 13 from floating in the battery shell 1 again. The depth of the guide groove 421 decreases from the end away from the rotating shaft 4 to the end close to the rotating shaft 4, so that the dust in the guide groove 421 can be quickly squeezed and moved to the discharge port 103. The battery shell 1 is provided with a discharge port 103 corresponding to the scraper 42.

[0044] Specifically, after the filter plate 13 filters the air, dust will adhere to the filter plate 13. The scraper 42 driven by the rotating shaft 4 can process the dust on the filter plate 13 and discharge it through the discharge port 103 to prevent the filter holes on the filter plate 13 from being blocked and affecting the air circulation.

[0045] like Fig.11 As shown, the rotating shaft 4 includes a first shaft 401 and a second shaft 402, a slot 404 is provided at one end of the first shaft 401 facing the second shaft 402, a round rod 403 is fixedly connected to one end of the second shaft 402 facing the first shaft 401, the round rod 403 is located in the slot 404, a torsion spring 405 is fixedly connected between the slot 404 and the round rod 403, a top ball 406 is elastically provided on the circumferential direction of the second shaft 402, and a card slot 131 corresponding to the top ball 406 is provided on the filter plate 13.

[0046] Specifically, the cooperation between the top ball 406 and the slot 131 can limit the position of the second shaft 402. When the first shaft 401 rotates, the second shaft 402 cannot rotate due to the cooperation between the top ball 406 and the slot 131. The first shaft 401 causes the torsion spring 405 to rotate and compress. When the pressure of the torsion spring 405 overcomes the elastic force between the top ball 406 and the second shaft 402, the torsion spring 405 releases the pressure, and the second shaft 402 rotates with the first shaft 401. When the top ball 406 corresponds to the slot 131 again, the second shaft 402 is fixed on the filter plate 13 again, so that the scraper 42 has an intermittent rotation effect, thereby avoiding wear caused by long-term rotation between the scraper 42 and the filter plate 13.

[0047] Working principle of the present invention:

[0048] When the new energy vehicle is in high-speed motion, the lithium battery 3 will emit a large amount of heat when in use. The movement of the new energy vehicle will generate airflow from the first mounting plate 101 into the battery shell 1, and the flowing air will move the heat emitted by the lithium battery 3 toward the inside of the mounting shell 2 through the airflow channel 14;

[0049] The hot air is filtered by the filter plate 13 and enters the conical cavity 53 in the mounting shell 2. Due to the rapid movement of the airflow, the hot air drives the fan blade 55 to rotate. At the same time, the fan blade 55 compresses the air, so that the temperature of the air continues to rise. The compressed air flows to the piston cylinder 61 through the mounting groove 54 and the first air outlet channel 51.

[0050] The airflow will first drive the fan blades 552 to rotate, and the fan blades 552 drive the turntable 41 to rotate through the rotating shaft 4. The turntable 41 makes the piston block 62 slide up and down in the piston cylinder 61 through the mounting rod 411 and the rotating arm 63. The air in the piston cylinder 61 is compressed by the piston block 62, and the air is compressed by the fan blade 55 and then blown to the piston cylinder 61 through the first air outlet channel 51. The air in the piston cylinder 61 expands when it encounters heat, so that the piston block 62 extends out of the piston cylinder 61, and then the turntable 41 drives the rotating shaft 4 to rotate, realizing the use of the airflow and the heat dissipated by the lithium battery 3 as the driving force of the fan blade 55, thereby better driving the air to flow faster and achieving the effect of heat dissipation of the lithium battery 3;

[0051] Among them, after the new energy vehicle stops moving, since the lithium battery 3 has not completely cooled down, the drive unit 6 will continue to drive the fan blades 55 to rotate and compress and transport the air, so that the drive unit 6 continues to work until the temperature of the lithium battery 3 drops.

[0052] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A new energy vehicle battery heat dissipation device, comprising a battery shell (1), characterized in that: One end of the battery shell (1) is connected to a mounting shell (2), a lithium battery (3) is mounted in the battery shell (1), and a filter plate (13) is provided between the mounting shell (2) and the battery shell (1); A mounting block (5) is mounted inside the mounting shell (2), the middle part of the mounting block (5) is rotatably connected to a rotating shaft (4), one end of the rotating shaft (4) passes through the mounting block (5), the mounting block (5) has a conical cavity (53) on the side facing the battery shell (1), the mounting block (5) has a first air outlet channel (51) on the side away from the battery shell (1), the first air outlet channel (51) is connected to the conical cavity (53), a fan (55) mounted on the rotating shaft (4) is arranged inside the conical cavity (53), the mounting block (5) has a driving unit (6) fixed on the mounting shell (2) on the side away from the battery shell (1), and an airflow is generated during the movement of the automobile, the airflow passes through the battery shell (1) to take away the heat of the lithium battery (3) and drives the lithium battery (3) to rotate, so that the heat of the lithium battery (3) is compressed and then driven to rotate by the driving unit (6); A plurality of mounting grooves (54) are provided inside the conical cavity (53); two adjacent conical cavities (53) are connected via a connecting channel (541); the fan blades (55) are located in the mounting grooves (54); and the number of the fan blades (55) is equal to the number of the mounting grooves (54); and the first air outlet channel (51) is connected to the mounting groove (54) at the rear end of the conical cavity (53); The driving unit (6) comprises a piston cylinder (61) and a rotating disk (41); a piston block (62) is slidably fitted inside the piston cylinder (61); an end of the piston block (62) away from the piston cylinder (61) is hingedly connected to a rotating arm (63); the rotating disk (41) is fixedly connected to an end of the rotating shaft (4) away from the mounting shell (2); a mounting rod (411) is eccentrically connected to the rotating disk (41); and the mounting rod (411) is rotatably connected to the rotating arm (63); The battery shell (1) is provided with four symmetrically arranged positioning grooves (12), the inner cavity of the battery shell (1) is circular, and when the four corners of the lithium battery (3) are respectively located in the four positioning grooves (12), an air flow channel (14) is formed between the inner cavity of the battery shell (1) and the lithium battery (3).

2. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: The diameters of the plurality of fan blades (55) decrease in sequence from an end of the mounting block (5) close to the battery shell (1) to an end far from the battery shell (1).

3. A new energy vehicle battery heat dissipation device according to claim 2, characterized in that: The fan sheet (55) comprises a fixing plate (551), the fixing plate (551) being fixedly connected to the rotating shaft (4), a fan blade (552) being connected to a side of the fixing plate (551) facing the battery housing (1), an annular plate (553) connected to the fixing plate (551) being arranged on the outer periphery of the fan blade (552), and a ventilation cavity (554) being provided between the annular plate (553) and the fixing plate (551).

4. A new energy vehicle battery heat dissipation device according to claim 2, characterized in that: A second air outlet channel (52) located on the mounting block (5) is provided below the first air outlet channel (51); the second air outlet channel (52) is communicated with the mounting groove (54) at the rear end of the tapered cavity (53); and a pressure valve (521) connected to the mounting block (5) is provided at the outlet end of the second air outlet channel (52).

5. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: A scraper (42) is provided on the side of the filter plate (13) facing the battery shell (1), the scraper (42) is in contact with the filter plate (13), and one end of the rotating shaft (4) facing the battery shell (1) passes through the filter plate (13) and is connected to the scraper (42).

6. A new energy vehicle battery heat dissipation device according to claim 5, characterized in that: A guide groove (421) is provided on one side of the scraper (42), and the depth of the guide groove (421) decreases from an end away from the rotating shaft (4) to an end close to the rotating shaft (4).

7. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: The rotating shaft (4) comprises a first shaft (401) and a second shaft (402); a slot (404) is provided at one end of the first shaft (401) facing the second shaft (402); a round rod (403) is fixedly connected to one end of the second shaft (402) facing the first shaft (401); the round rod (403) is located in the slot (404); a torsion spring (405) is fixedly connected between the slot (404) and the round rod (403); a top ball (406) is provided on the circumferential elasticity of the second shaft (402); and a clamping groove (131) corresponding to the top ball (406) is provided on the filter plate (13).

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