Lithium battery heat dissipation device with graded cooling function and method of lithium battery heat dissipation device

Abstract

The invention discloses a graded cooling lithium battery heat dissipation device and method, and relates to the technical field of lithium battery heat dissipation, the graded cooling lithium battery heat dissipation device comprises a battery box for bearing a lithium battery, a plurality of breathable shells and a plurality of separation shells, the separation shells are fixedly mounted in an inner cavity of the battery box, and the breathable shells are mounted in the inner cavity of the battery box; the plurality of breathable shells are uniformly distributed on the two sides of the partition shell, the two ends of the plurality of breathable shells are fixedly connected with the inner wall of the battery box and the outer wall of the partition shell respectively, a cooling assembly used for cooling the lithium batteries in a graded mode is arranged outside the battery box, and the cooling assembly comprises a heat dissipation pipe and an air inlet pipe; the heat dissipation pipe is fixedly installed in the inner cavity of the separation shell, and the outer wall of the heat dissipation pipe and the outer wall of the ventilation shell are each provided with a plurality of rows of air outlet holes communicating with the inner cavity of the heat dissipation pipe and the inner cavity of the ventilation shell. Through the mutual cooperation of the parts, the air flow rate of the outer surface of the lithium battery can be controlled according to the running state of the lithium battery, so that the heat emitted by the lithium battery is subjected to graded heat exchange.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery heat dissipation, and in particular to a lithium battery heat dissipation device and method for graded temperature reduction. Background Art

[0002] Lithium batteries have high energy density and are developed as the main power battery, and with the improvement of safety technology.

[0003] At present, lithium batteries have been installed as the main energy storage device of new energy vehicles. However, lithium batteries inevitably generate heat during operation. The heat generated is easily accumulated inside the battery compartment of new energy vehicles, which in turn creates certain safety hazards. Existing heat dissipation devices mostly use active circulation heat exchange to achieve heat transfer, but this method will be automatically executed at the beginning of the operation of the lithium battery. During this period, when the heating efficiency of the lithium battery is not high, the lithium battery power will be steadily consumed, and the lithium battery power cannot be fully utilized. Therefore, a heat dissipation device is proposed that can perform graded heat exchange on the heat generated by the lithium battery according to the operating status of the lithium battery. Summary of the invention

[0004] The object of the present invention is to provide a lithium battery heat dissipation device and method for graded temperature reduction to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a lithium battery heat dissipation device with graded cooling and a method thereof, comprising a battery box for carrying lithium batteries, a breathable shell and a partition shell, the partition shell being fixedly installed in the inner cavity of the battery box, a plurality of breathable shells being installed in the inner cavity of the battery box, the plurality of breathable shells being evenly distributed on both sides of the partition shell, and the two ends of the plurality of breathable shells being respectively fixedly connected to the inner wall of the battery box and the outer wall of the partition shell, and a cooling component for graded cooling of the lithium batteries is provided on the outside of the battery box.

[0006] The cooling component includes a heat dissipation pipe and an air inlet pipe. The heat dissipation pipe is fixedly installed in the inner cavity of the partition shell. The outer walls of the heat dissipation pipe and the breathable shell are provided with multiple rows of air outlet holes connected to their own inner cavities. A connecting pipe is fixedly installed laterally along one side of the battery box along its own side wall. A plurality of air inlet pipes connected to its own inner cavity are fixedly installed in a straight line on the side of the connecting pipe away from the battery box, and the inner cavity of the connecting pipe is connected to the inner cavity of the heat dissipation pipe through a conduit.

[0007] The cooling component also includes a baffle, and a baffle that fits with the end of the air inlet pipe is slidably installed on one end of the air inlet pipe away from the connecting pipe, wherein two connecting strips connected to the upper and lower outer walls of the baffles are arranged between two adjacent baffles, and a reciprocating motor is fixedly installed on the side of the battery box close to the connecting pipe, and a driving threaded rod is fixedly installed on the power output end of the reciprocating motor, and the outer wall of the driving threaded rod is threadedly fitted with a driving block connected to the outer wall of one of the connecting strips.

[0008] A temperature sensor for monitoring the temperature of the lithium battery is fixedly installed at the bottom of the inner cavity of the partition shell, and the temperature sensor controls the switch of the reciprocating motor through a logic controller.

[0009] Preferably, the partition shell is arranged in a "cross"-shaped structure, and the ends of the partition shell are fixedly connected to the inner wall of the battery box.

[0010] Preferably, a partition for separating the lithium batteries is provided between two adjacent air-permeable shells, and both ends of the partition are fixedly connected to adjacent sides of two adjacent air-permeable shells.

[0011] Preferably, the air inlet pipe is configured as a truncated cone structure, and the small end of the air inlet pipe is fixedly connected to the outer wall of the connecting pipe.

[0012] Preferably, a threaded hole is provided on one side of the top of the driving block, and an end of the driving threaded rod away from the reciprocating motor passes through the threaded hole and extends to the other side of the driving block.

[0013] Preferably, a transmission slide rail is fixedly installed on one side of the battery box close to the connecting tube, and the transmission slide rail is located directly below the multiple baffles, wherein a slider is fixedly installed on the connecting strip close to the transmission slide rail, and the end of the slider away from the connecting strip extends into the inner cavity of the transmission slide rail.

[0014] Preferably, transmission balls that fit the inner wall of the transmission slide rail are rotatably mounted on the left and right sides of the slider.

[0015] Preferably, an installation box is fixedly installed on the side of the battery box away from the connecting tube, a driving motor is installed in the inner cavity of the installation box under the control of a logic controller, a heat dissipation fan blade is fixedly installed on the power output end of the driving motor, an air duct is fixedly installed on the outer wall of the installation box, one end of the air duct away from the installation box extends to the interior of the battery box and is fixedly connected to the other end of the heat dissipation pipe, and the air duct is located between the driving motor and the side wall of the installation box.

[0016] Preferably, a filter screen for filtering dust is fixedly mounted on one end of the mounting box away from the battery box.

[0017] A hierarchical cooling and heat dissipation method for a lithium battery comprises the following steps: A1. Start the reciprocating motor to rotate the driving threaded rod, and move the driving block with the cooperation of the driving threaded rod. When the driving block moves, multiple baffles move accordingly, thereby controlling the opening and closing area of ​​the opening end of the air inlet pipe and accurately controlling the air flow rate and air flow volume inside the heat dissipation pipe.

[0018] A2. When the vehicle is stationary, due to high weather temperature or excessive temperature of the lithium battery after use, the temperature sensor controls the logic controller to energize the drive motor. After the drive motor is energized, the power output end rotates, and the heat dissipation fan blades rotate accordingly. When the heat dissipation fan blades rotate, the air flow around the installation box is accelerated, and the outside air is transmitted to the inside of the heat dissipation pipe through the air duct. When the vehicle is stationary, it is beneficial to increase the air flow rate around the lithium battery, thereby quickly dissipating the heat of the lithium battery in a stationary state.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention accelerates the air flow rate on the outer surface of the lithium battery by arranging a cooling component, thereby dissipating the heat on the outer surface of the lithium battery, reducing the power consumption of the lithium battery, and being beneficial to fully utilizing the power of the lithium battery. At the same time, the opening and closing area of ​​the open end of the air inlet pipe is controlled, and the air flow rate and air flow amount inside the heat dissipation pipe are accurately controlled, which is beneficial to controlling the air flow rate on the outer surface of the lithium battery according to the operating state of the lithium battery, thereby performing graded heat exchange on the heat generated by the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is an assembly diagram of the battery box and the mounting box of the present invention; Figure 3 It is an assembly diagram of the heat dissipation pipe and the connecting pipe of the present invention; Figure 4 It is an assembly diagram of the slider and the transmission ball of the present invention; Figure 5 For the present invention Figure 1 A magnified view of the structure at center.

[0021] In the figure: 1. battery box; 2. transmission slide rail; 3. connecting pipe; 4. baffle; 5. partition shell; 6. breathable shell; 7. partition; 8. heat dissipation pipe; 9. air inlet pipe; 10. temperature sensor; 11. air guide pipe; 12. installation box; 13. filter screen; 14. heat dissipation fan blade; 15. slider; 16. transmission ball; 17. drive threaded rod; 18. drive block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0023] See also Figure 1-5 The present embodiment provides a lithium battery heat dissipation device and method with graded cooling, including a battery box 1 for carrying lithium batteries, a breathable shell 6 and a partition shell 5, wherein the partition shell 5 is fixedly installed in the inner cavity of the battery box 1, wherein the battery box 1 can carry multiple lithium batteries, which is beneficial to the use and installation of lithium batteries.

[0024] Multiple breathable shells 6 are installed in the inner cavity of the battery box 1, and the multiple breathable shells 6 are evenly distributed on both sides of the partition shell 5, and the two ends of the multiple breathable shells 6 are respectively fixedly connected to the inner wall of the battery box 1 and the outer wall of the partition shell 5. The outside of the battery box 1 is provided with a cooling component for graded cooling of the lithium batteries, wherein multiple lithium batteries are placed between two adjacent breathable shells 6, which is conducive to neatly arranging the multiple lithium batteries. At the same time, the inner cavities of the multiple breathable shells 6 and the inner cavities of the partition shell 5 are interconnected, which is conducive to the exchange of gas between the breathable shell 6 and the partition shell 5.

[0025] The cooling component includes a heat dissipation pipe 8 and an air inlet pipe 9. The heat dissipation pipe 8 is fixedly installed in the inner cavity of the partition shell 5. The outer walls of the heat dissipation pipe 8 and the breathable shell 6 are provided with multiple rows of air outlet holes connected to their own inner cavities. The air outlet holes provided on the outer walls of the heat dissipation pipe 8 and the breathable shell 6 can realize the exchange of air inside the heat dissipation pipe 8 and the air inside the partition shell 5.

[0026] A connecting pipe 3 is fixedly installed on one side of the battery box 1 along its side wall, and a plurality of air inlet pipes 9 connected to its own inner cavity are fixedly installed in a straight line on the side of the connecting pipe 3 away from the battery box 1, and the inner cavity of the connecting pipe 3 is interconnected with the inner cavity of the heat dissipation pipe 8 through a conduit. When the car is driving, the air outside the battery box 1 flows rapidly, and the outside air flows into the inside of the connecting pipe 3 through the plurality of air inlet pipes 9, and the air inside the connecting pipe 3 flows into the inside of the heat dissipation pipe 8 through the conduit, and the air inside the heat dissipation pipe 8 flows into the inside of the partition shell 5 through the air outlet holes opened on the outer wall, and then the air inside the partition shell 5 flows into the inside of the plurality of breathable shells 6, and then flows between two adjacent breathable shells 6 through the plurality of air outlet holes opened on the outer wall of the breathable shell 6, thereby accelerating the air flow rate on the outer surface of the lithium battery, thereby dissipating the heat on the outer surface of the lithium battery, reducing the consumption of lithium battery power, and being conducive to full utilization of the lithium battery power.

[0027] The cooling component also includes a baffle 4, and a baffle 4 that fits with its own end is slidably installed on one end of the air inlet pipe 9 away from the connecting pipe 3, wherein two connecting strips connected to the upper and lower outer walls of the baffles 4 are arranged between two adjacent baffles 4, wherein multiple connecting strips are conducive to connecting multiple baffles 4, thereby realizing synchronous movement of multiple baffles 4.

[0028] A reciprocating motor is fixedly installed on one side of the battery box 1 close to the connecting pipe 3, and a driving threaded rod 17 is fixedly installed on the power output end of the reciprocating motor. The outer wall of the driving threaded rod 17 is sleeved with a driving block 18 connected to the outer wall of one of the connecting strips through a threaded fit, wherein starting the reciprocating motor allows the driving threaded rod 17 to rotate, and the driving block 18 moves with the cooperation of the driving threaded rod 17, and when the driving block 18 moves, multiple baffles 4 move accordingly, thereby controlling the opening and closing area of ​​the open end of the air inlet pipe 9, and accurately controlling the air flow rate and air flow amount inside the heat dissipation pipe 8, which is beneficial to control the air flow rate on the outer surface of the lithium battery according to the operating status of the lithium battery, thereby performing graded heat exchange on the heat generated by the lithium battery.

[0029] A temperature sensor 10 for monitoring the temperature of the lithium battery is fixedly installed at the bottom of the inner cavity of the partition shell 5. The temperature sensor 10 controls the switch of the reciprocating motor through a logic controller. The temperature sensor 10 can monitor the outer surface temperature of the lithium battery in real time, and control the running time of the reciprocating motor through the logic controller according to the temperature of the lithium battery during operation, which is conducive to accurately controlling the moving distance of the baffle 4.

[0030] The partition shell 5 is configured as a "cross" structure, and the ends of the partition shell 5 are fixedly connected to the inner wall of the battery box 1, which is beneficial to increase the strength of the partition shell 5 and the battery box 1, while uniformly dividing the internal space of the battery box 1 is beneficial to the installation of multiple lithium batteries.

[0031] A partition 7 for separating lithium batteries is provided between two adjacent breathable shells 6, and both ends of the partition 7 are fixedly connected to the adjacent sides of the two adjacent breathable shells 6. The partition 7 can separate the space formed by the two adjacent breathable shells 6, which is beneficial to improve the utilization rate of the internal space of the battery box 1 and increase the number of installed lithium batteries.

[0032] The air inlet pipe 9 is configured as a truncated cone structure, and the small end of the air inlet pipe 9 is fixedly connected to the outer wall of the connecting pipe 3 , which is beneficial to increasing the air inlet end area of ​​the air inlet pipe 9 .

[0033] A threaded hole is opened on one side of the top of the driving block 18, and the end of the driving threaded rod 17 away from the reciprocating motor passes through the threaded hole and extends to the other side of the driving block 18. Through the cooperation of the threaded hole and the driving threaded rod 17, the moving direction of the driving block 18 can be accurately controlled and the driving block 18 can be positioned after moving.

[0034] A transmission rail 2 is fixedly installed on one side of the battery box 1 close to the connecting tube 3. The transmission rail 2 is located directly below the multiple baffles 4, wherein a slider 15 is fixedly installed on the connecting strip close to the transmission rail 2. The slider 15 extends into the inner cavity of the transmission rail 2 at one end away from the connecting strip. The cooperation between the transmission rail 2 and the multiple sliders 15 is beneficial to limit the sliding trajectory of the baffle 4 and support the bottom of the baffle 4, thereby preventing the baffle 4 from shaking and deflecting when moving back and forth, thereby improving the stability of the baffle 4 moving back and forth.

[0035] Transmission balls 16 that fit the inner wall of the transmission rail 2 are rotatably installed on the left and right sides of the slider 15. When the slider 15 moves along the inside of the transmission rail 2, multiple transmission balls 16 and the inner wall of the transmission rail 2 rotate relative to each other, which is beneficial to reducing the resistance encountered by the slider 15 when it moves back and forth, and improving the smoothness of the slider 15 when it moves back and forth. Example

[0036] See also Figure 1-5 , further improvements made on the basis of Example 1: A mounting box 12 is fixedly installed on one side of the battery box 1 away from the connecting tube 3, and a driving motor is installed in the inner cavity of the mounting box 12 through the control of a logic controller, and a heat dissipation fan blade 14 is fixedly installed on the power output end of the driving motor, and an air duct 11 is fixedly installed on the outer wall of the mounting box 12, and one end of the air duct 11 away from the mounting box 12 extends to the interior of the battery box 1 and is fixedly connected to the other end of the heat dissipation pipe 8, and the air duct 11 is located between the driving motor and the side wall of the mounting box 12, wherein when the vehicle is at rest due to high weather temperature or excessive temperature of the lithium battery after use, the temperature sensor 10 controls the logic controller to energize the driving motor, and the power output end of the driving motor rotates after the driving motor is energized, and at this time the heat dissipation fan blade 14 rotates accordingly, and when the heat dissipation fan blade 14 rotates, the air flow around the mounting box 12 is accelerated, and the air flowing from the outside is transmitted to the inside of the heat dissipation pipe 8 through the air duct 11, which is beneficial to increase the air flow rate around the lithium battery when the vehicle is at rest, thereby quickly dissipating the heat of the lithium battery at rest.

[0037] A filter 13 for filtering dust is fixedly installed at one end of the installation box 12 away from the battery box 1. When outside air enters the installation box 12, the filter 13 filters the air entering the installation box 12, so that dust in the air is trapped on the outer surface of the filter 13, which is beneficial to filtering dust in the air.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery heat dissipation device with graded cooling, characterized in that: It comprises a battery box (1) for carrying lithium batteries, a ventilated shell (6) and a partition shell (5), wherein the partition shell (5) is fixedly installed in the inner cavity of the battery box (1), a plurality of ventilated shells (6) are installed in the inner cavity of the battery box (1), the plurality of ventilated shells (6) are evenly distributed on both sides of the partition shell (5), and the two ends of the plurality of ventilated shells (6) are respectively fixedly connected to the inner wall of the battery box (1) and the outer wall of the partition shell (5), and a cooling component for stepwise cooling of the lithium batteries is arranged outside the battery box (1); The cooling component comprises a heat dissipation pipe (8) and an air inlet pipe (9), the heat dissipation pipe (8) being fixedly mounted in the inner cavity of the partition shell (5), the outer walls of the heat dissipation pipe (8) and the air permeable shell (6) being provided with a plurality of rows of air outlet holes connected to their inner cavities, a connecting pipe (3) being fixedly mounted laterally along the side wall of the battery box (1) on one side, a plurality of air inlet pipes (9) connected to their inner cavity being fixedly mounted in a straight line on the side of the connecting pipe (3) away from the battery box (1), and the inner cavity of the connecting pipe (3) being connected to the inner cavity of the heat dissipation pipe (8) through a conduit; The cooling component further comprises a baffle (4), a baffle (4) which is fitted with the end of the air inlet pipe (9) being slidably mounted on one end away from the connecting pipe (3), wherein two connecting strips connected to the upper and lower outer walls of the baffles (4) are arranged between two adjacent baffles (4), a reciprocating motor is fixedly mounted on the side of the battery box (1) close to the connecting pipe (3), a driving threaded rod (17) is fixedly mounted on the power output end of the reciprocating motor, and a driving block (18) which is connected to the outer wall of one of the connecting strips is sleeved on the outer wall of the driving threaded rod (17) through a threaded fit; A temperature sensor (10) for monitoring the temperature of the lithium battery is fixedly mounted on the bottom of the inner cavity of the partition housing (5); the temperature sensor (10) controls the switching of the reciprocating motor through a logic controller.

2. A lithium battery heat dissipation device with graded cooling according to claim 1, characterized in that: The partition shell (5) is arranged in a "cross"-shaped structure, and the ends of the partition shell (5) are fixedly connected to the inner wall of the battery box (1).

3. A lithium battery heat dissipation device with graded cooling according to claim 2, characterized in that: A partition plate (7) for separating lithium batteries is provided between two adjacent air-permeable housings (6), and two ends of the partition plate (7) are fixedly connected to adjacent sides of two adjacent air-permeable housings (6).

4. The lithium battery heat dissipation device with graded cooling according to claim 1, characterized in that: The air inlet pipe (9) is configured as a truncated cone-shaped structure, and the small end of the air inlet pipe (9) is fixedly connected to the outer wall of the connecting pipe (3).

5. The lithium battery heat dissipation device with graded cooling according to claim 1, characterized in that: A threaded hole is provided on one side of the top of the driving block (18), and one end of the driving threaded rod (17) away from the reciprocating motor passes through the threaded hole and extends to the other side of the driving block (18).

6. The lithium battery heat dissipation device with graded cooling according to claim 1, characterized in that: A transmission slide rail (2) is fixedly mounted on one side of the battery box (1) close to the connecting tube (3), and the transmission slide rail (2) is located directly below the plurality of baffles (4), wherein a slider (15) is fixedly mounted on a connecting strip close to the transmission slide rail (2), and an end of the slider (15) away from the connecting strip extends into the inner cavity of the transmission slide rail (2).

7. A lithium battery heat dissipation device with graded cooling according to claim 6, characterized in that: Transmission balls (16) that fit closely to the inner wall of the transmission rail (2) are rotatably mounted on the left and right sides of the slider (15).

8. The lithium battery heat dissipation device with graded cooling according to claim 1, characterized in that: A mounting box (12) is fixedly mounted on a side of the battery box (1) away from the connecting tube (3); a driving motor is mounted in an inner cavity of the mounting box (12) under the control of a logic controller; a heat dissipation fan blade (14) is fixedly mounted on a power output end of the driving motor; an air duct (11) is fixedly mounted on an outer wall of the mounting box (12); one end of the air duct (11) away from the mounting box (12) extends into the interior of the battery box (1) and is fixedly connected to the other end of the heat dissipation tube (8); and the air duct (11) is located between the driving motor and a side wall of the mounting box (12).

9. A lithium battery heat dissipation device with graded temperature reduction according to claim 8, characterized in that: A filter screen (13) for filtering dust is fixedly mounted on one end of the installation box (12) away from the battery box (1).

10. A lithium battery heat dissipation method with graded cooling, according to the lithium battery heat dissipation device with graded cooling as claimed in claim 1, characterized in that: The steps include: A1. Start the reciprocating motor to rotate the driving threaded rod (17), and move the driving block (18) in cooperation with the driving threaded rod (17). When the driving block (18) moves, the plurality of baffles (4) move accordingly, thereby controlling the opening and closing area of ​​the opening end of the air inlet pipe (9), and accurately controlling the air flow rate and air flow amount inside the heat dissipation pipe (8); A2. When the vehicle is stationary, due to high weather temperature or excessive temperature of the lithium battery after use, the temperature sensor (10) controls the logic controller to energize the drive motor. After the drive motor is energized, the power output end rotates, and the heat dissipation fan blades (14) rotate accordingly. When the heat dissipation fan blades (14) rotate, the air flow around the installation box (12) is accelerated, and the air flowing from the outside is transmitted to the inside of the heat dissipation pipe (8) through the air guide pipe (11). When the vehicle is stationary, it is beneficial to increase the air flow rate around the lithium battery, thereby quickly dissipating the heat of the lithium battery in the stationary state.

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