New energy battery heat dissipation structure

Abstract

The invention discloses a new energy battery heat dissipation structure, and relates to the technical field of battery cooling and heat dissipation, the new energy battery heat dissipation structure comprises a mounting support plate, a battery pack body placed on the upper surface of the mounting support plate, and a negative pressure pipeline arranged on one side of the battery pack body and used for discharging hot air, the expansion air bags are arranged on the negative pressure pipeline and can be automatically expanded and contracted according to the temperature of each area of the battery pack body, and two light baffles capable of automatically adjusting the opening degree so as to adjust the local heat dissipation efficiency are arranged on the two sides of each expansion air bag correspondingly; a double-layer pipeline capable of injecting gas into the expansion air bag is arranged on one side of the expansion air bag, a gas compensation mechanism for controlling the minimum contraction amplitude of the expansion air bag is arranged at the top of the expansion air bag, air cooling and water cooling are combined, the expansion air bag is used for driving the light baffle, and self-adaptive adjustment of the sectional area of the ventilation groove is achieved. The problem that the cooling liquid is insufficient in heat dissipation effect in the second half process is compensated through air volume adjustment, and the requirement for dynamic heat dissipation is met through fixed energy consumption.

Description

Technical Field

[0001] This invention relates to the field of battery cooling and heat dissipation technology, specifically to a heat dissipation structure for new energy batteries. Background Technology

[0002] New energy batteries refer to advanced electrochemical energy storage devices used in new energy vehicles, energy storage systems, and renewable energy infrastructure. Their core objectives are to achieve high energy density, high safety, long lifespan, low cost, and environmental friendliness. During the charging and discharging process of new energy batteries (especially under high-rate fast charging and long-term high-power discharge conditions), the increased electrode reaction rate and aggravated internal resistance loss lead to the generation of a large amount of heat. The instantaneous heat generation power of a single cell can reach 5-10W. If the heat cannot be dissipated in time, the internal temperature of the battery pack can easily rise rapidly to above 45℃, forming a regional temperature gradient of 3-12℃. Excessive temperature will damage the crystal structure of the electrode materials and accelerate the decomposition of the electrolyte, resulting in a 20-30% increase in the battery capacity decay rate. Existing heat dissipation methods for new energy batteries mainly include air cooling and water cooling. Air cooling involves setting up air inlets, air outlets and matching fans around the battery pack casing, using fans to force the hot air generated by the battery operation out of the battery pack. Water cooling involves setting up coolant channels at the bottom of the battery pack, where coolant circulates to carry away the heat generated by the battery. When the battery is operating under high load or the ambient temperature is high, air cooling or water cooling alone is difficult to meet the heat dissipation requirements, so air cooling and water cooling are combined. However, in existing heat dissipation methods that combine air cooling and water cooling, the air cooling pipes and water cooling pipes are laid in advance, and the air ducts are fixed. But in actual use, the temperature of each area of ​​the battery may be different. Some areas are hot and some are cold. Moreover, the heat dissipated by the battery during operation varies in different seasons. Traditional fixed heat dissipation mode, with fixed air ducts, cannot be flexibly adjusted according to the actual temperature of each area of ​​the battery, making it difficult to achieve on-demand heat dissipation and resulting in low heat dissipation efficiency.

[0003] To address the aforementioned issues, there is an urgent need for innovative designs based on existing heat dissipation devices. Summary of the Invention

[0004] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a heat dissipation structure for new energy batteries, thereby solving the problem of traditional heat dissipation methods mentioned in the background, where the air duct is fixed and the overall heat dissipation efficiency cannot be automatically adjusted according to the regional temperature.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat dissipation structure for a new energy battery, including a mounting plate and a battery pack body placed on the upper surface of the mounting plate, a negative pressure pipe disposed on one side of the battery pack body for discharging hot air, and a plurality of expansion airbags disposed on the negative pressure pipe that can automatically expand and contract according to the temperature of each area of ​​the battery pack body, and two lightweight baffles that can automatically adjust their opening and closing degree to adjust the local heat dissipation efficiency are respectively provided on both sides of each expansion airbag, a double-layer pipe that can inject gas into the expansion airbag is provided on one side of the expansion airbag, and a gas compensation mechanism that controls the minimum contraction amplitude of the expansion airbag is provided on the top of the expansion airbag; The gas compensation mechanism includes a second link, a balance bar is rotatably connected to the top of the second link, and a magnetic ball is slidably connected inside the balance bar; Among them, the inner wall of the lightweight baffle located on the left side of the inflatable airbag is bonded with a magnetic sheet, and the magnetic sheet has the same magnetism as the magnetic ball; The other side of the battery pack body is equipped with an air-cooling pipe.

[0006] Preferably, the mounting plate has several cooling pipes laid inside, and two adjacent cooling pipes are connected by a double-layer pipe. The cooling pipes are designed as continuously bent S-shaped pipes, and the two ends of the cooling pipes are respectively connected to a water inlet and a water outlet.

[0007] Preferably, the double-layer pipe is divided into an outer pipe and an inner pipe. The inner wall of the inner pipe is slidably connected with a sealing plug. One end of the outer pipe is provided with several branch pipes. The drain outlet of the cooling pipe is connected to the outer pipe, and the inlet of the cooling pipe is connected to the branch pipes.

[0008] Preferably, the first half of the inner pipe is located inside the outer pipe, the second half of the inner pipe extends to the outside of the outer pipe, and a flexible hose is inserted into the side curved surface of the inner pipe, the flexible hose being in communication with the inflatable airbag.

[0009] Preferably, the lower surface of the negative pressure pipe is provided with ventilation grooves corresponding to the position of each expansion airbag, the bottom of the negative pressure pipe is equipped with a side baffle, and the two sides of the expansion airbag are respectively bonded to two lightweight baffles. The expansion and contraction of the expansion airbag drives the two lightweight baffles to open and close along the inner wall of the negative pressure pipe, which is accompanied by the change of the cross-sectional area of ​​the ventilation groove.

[0010] Preferably, the gas compensation mechanism further includes an auxiliary air tube inserted into the top of the inflatable air bladder, an injection tube inserted into the top of the auxiliary air tube, a piston slidably connected to the inner wall of the injection tube, a negative pressure pipeline fixedly connected to the outer wall of the injection tube, a first connecting rod rotatably connected to the top of the piston, and a second connecting rod rotatably connected to the top of the first connecting rod.

[0011] Preferably, the balance bar and the negative pressure pipe are rotatably connected by a shaft, and a protrusion is provided at one end of the balance bar near the second connecting rod. A buzzer alarm is installed on the outer wall of the negative pressure pipe near the lower part of the balance bar by bolts.

[0012] Preferably, the upper surface of the mounting plate is provided with a plurality of strip-shaped heat exchange grooves, and the front side of the mounting plate is provided with a plurality of air inlets, and the inner wall of the air-cooled pipe is provided with a plurality of exhaust grooves corresponding to the position of the battery pack body.

[0013] Compared with the prior art, the beneficial effects of the present invention are: By combining air cooling and water cooling, an expansion bladder that can automatically expand and contract according to the ambient temperature is set between the negative pressure pipe and the battery pack body. This changes the traditional fixed air duct design and gives it the ability to adapt to ambient temperature. When the operating temperature of the battery pack body rises, the expansion bladders in each area expand individually due to heat. Lightweight baffles that can automatically adjust their opening and closing angle are set on both sides of each expansion bladder. By adjusting the opening and closing angle of the lightweight baffles, the gas flow can be increased, thereby optimizing the local heat dissipation efficiency. At the same time, when the temperature in other areas is relatively low, the expansion bladders contract and the lightweight baffles close, reducing the gas flow in the low-temperature area, thus achieving dynamic adjustment of heat dissipation efficiency. In addition, a double-layered pipe is installed at the bottom of the expansion airbag. The double-layered pipe can sense the heat energy of each area of ​​the battery pack in real time and use this heat energy to expand the gas molecules in the double-layered pipe, quickly replenishing the expansion airbag with gas, so that the expansion airbag expands quickly and ensures the stability of the heat exchange efficiency in this area. While sensing the changes in the ambient temperature, it also receives the changes in the temperature of the battery pack itself, forming a dual-drive system. Compared with the traditional blind increase of axial flow fans and negative pressure fans, this system uses air volume adjustment to compensate for the insufficient heat dissipation effect of the coolant in the second half of the process. It uses fixed energy consumption to meet the needs of dynamic heat dissipation. Compared with the traditional fixed air duct size, in normal temperature mode, in order to avoid excessive air cooling, the ventilation area of ​​all ventilation slots is reduced simultaneously to avoid excessive cold air supply causing the battery temperature to deviate from the optimal range. This reduces the battery pack's dependence on the vehicle's air cooling system, reduces the demand for cold air in this area, and thus reduces the operating load of the vehicle's air cooling system. This method is more energy-efficient and improves the safety and stability of battery operation. In addition, a gas compensation mechanism is installed at the top of the inflatable airbag to control the minimum contraction range of the airbag. This ensures that when the temperature is low or the battery pack is not running, the magnetic ball driven by the magnetic sheet of the lightweight baffle rotates, causing the balance bar to rotate. In conjunction with the transmission of the double linkage, the piston slides along the injection tube to replenish the inflatable airbag with gas in time. This ensures that the inflatable airbag will not collapse completely and maintains a minimum ventilation or standby mode. Even if the external temperature difference is large due to seasonal reasons, it can still maintain the most basic ventilation effect and avoid airflow blockage caused by complete contraction. Attached Figure Description

[0014] Figure 1 This is a top view of the overall structure of the present invention.

[0015] Figure 2 This is a top-view cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the cooling pipe and the double-layer pipe after they are separated according to the present invention.

[0017] Figure 4 This is a schematic diagram of the opening and closing range of the lightweight baffle under different volume shapes of the inflatable airbag of the present invention.

[0018] Figure 5 This is a schematic diagram of the connection structure between the lightweight baffle and the inflatable airbag of the present invention.

[0019] Figure 6 This is a schematic diagram showing the connection between the double-layered pipe and the inflatable airbag according to the present invention.

[0020] Figure 7 This is a cross-sectional view of the injection tube and balance bar of the present invention.

[0021] Figure 8 This is a schematic diagram of the structure of the balance bar after it is tilted according to the present invention.

[0022] In the diagram: 1. Mounting plate; 2. Battery pack body; 3. Negative pressure pipe; 301. Ventilation slot; 302. Side baffle; 4. Inflation airbag; 5. Double-layer pipe; 501. Outer pipe; 502. Inner pipe; 503. Sealing plug; 504. Diverter pipe; 6. Lightweight baffle; 7. Air-cooled pipe; 8. Cooling pipe; 801. Water inlet; 802. Drain outlet; 9. Gas compensation mechanism; 901. Auxiliary air pipe; 902. Injection pipe; 903. Piston; 904. First connecting rod; 905. Second connecting rod; 906. Balance bar; 907. Magnetic ball; 908. Protrusion; 10. Hose; 11. Magnetic sheet; 12. Buzzer alarm; 13. Heat exchange tank; 14. Air inlet. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 8The present invention provides a technical solution: a heat dissipation structure for a new energy battery, including a mounting plate 1, and a battery pack body 2 placed on the upper surface of the mounting plate 1, and a negative pressure pipe 3 provided on one side of the battery pack body 2 for discharging hot air, and a plurality of expansion airbags 4 provided on the negative pressure pipes 3 that can automatically expand and contract according to the temperature of each area of ​​the battery pack body 2, and two lightweight baffles 6 provided on both sides of each expansion airbag 4 that can automatically adjust the opening and closing degree to adjust the local heat dissipation efficiency, a double-layer pipe 5 provided on one side of the expansion airbag 4 that can inject gas into the expansion airbag 4, and a gas compensation mechanism 9 provided on the top of the expansion airbag 4 to control the minimum contraction amplitude of the expansion airbag 4; The gas compensation mechanism 9 includes a second link 905, a balance bar 906 is rotatably connected to the top of the second link 905, and a magnetic ball 907 is slidably connected inside the balance bar 906; Among them, a magnetic sheet 11 is bonded to the inner wall of the lightweight baffle 6 located on the left side of the inflatable airbag 4. The magnetic sheet 11 has the same magnetism as the magnetic ball 907. The other side of the battery pack body 2 is equipped with a cooling pipe 7.

[0025] By combining air cooling and water cooling, an expansion airbag 4 that can automatically expand and contract according to the ambient temperature is set between the negative pressure pipe 3 and the battery pack body 2. This changes the traditional fixed air duct design and gives it the ability to adapt to ambient temperature. When the operating temperature of some areas of the battery pack body 2 rises, the expansion airbag 4 expands due to heat. Lightweight baffles 6 that can automatically adjust their opening and closing angle are set on both sides of each expansion airbag 4. By adjusting the opening and closing angle of the lightweight baffles 6, the gas flow can be increased, thereby optimizing the local heat dissipation efficiency. At the same time, when the temperature of other areas is relatively low, the expansion airbag 4 contracts and the lightweight baffles 6 close, reducing the gas flow in the low-temperature area and realizing dynamic adjustment of heat dissipation efficiency. In addition, a double-layer pipe 5 is provided at the bottom of the expansion airbag 4. The double-layer pipe 5 can sense the heat energy of the battery pack body 2 in real time, and use the heat energy to make the gas molecules in the double-layer pipe 5 expand, which can quickly replenish the gas in the expansion airbag 4, so that the expansion airbag 4 expands quickly and ensures the stability of the heat exchange efficiency in this area. In addition, a gas compensation mechanism 9 is provided on the top of the inflatable airbag 4 to control the minimum contraction range of the inflatable airbag 4, ensuring that the inflatable airbag 4 will not completely collapse when the temperature is low or the battery pack body 2 stops running, maintaining a minimum ventilation or standby mode. Even if the outside temperature difference is large due to seasonal reasons, it can still maintain the most basic ventilation effect and avoid airflow blockage caused by complete contraction.

[0026] In this embodiment, as Figure 3 and Figure 6As shown, the interior of the mounting plate 1 is provided with several cooling pipes 8. Adjacent cooling pipes 8 are connected by a double-layer pipe 5. The cooling pipes 8 are designed as continuously bent S-shaped pipes, and the two ends of the cooling pipes 8 are respectively connected to a water inlet 801 and a drain outlet 802.

[0027] The double-layer pipe 5 is divided into an outer pipe 501 and an inner pipe 502. The inner wall of the inner pipe 502 is slidably connected with a sealing plug 503. One end of the outer pipe 501 is provided with several branch pipes 504. The drain outlet 802 of the cooling pipe 8 is connected to the outer pipe 501, and the inlet 801 of the cooling pipe 8 is connected to the branch pipes 504. It should be noted that the cooling pipe 8 is provided with an inlet 801 and a drain 802 at both ends. The drain 802 is connected to the outer pipe 501, and the inlet 801 is connected to the branch pipe 504. This ensures that after the coolant enters from one end, it flows through the entire S-shaped pipe, absorbs heat, and is discharged from the drain 802 at the other end. Then, the outer pipe 501 flows through the branch pipe 504 to the inlet 801 of the next cooling pipe 8, forming a one-way flow path.

[0028] In this embodiment, as Figure 1 and Figure 6 As shown, the first half of the inner pipe 502 is located inside the outer pipe 501, and the second half of the inner pipe 502 extends to the outside of the outer pipe 501. A flexible hose 10 is inserted into the side curved surface of the inner pipe 502, and the flexible hose 10 is connected to the inflatable airbag 4. It should be noted that the first half of the inner pipe 502 is located inside the outer pipe 501, and the second half extends outside the outer pipe 501. Both the first and second halves of the inner pipe 502 are filled with gas. The first half is the core area where the coolant heats the gas. When the coolant flows along the outer pipe 501, it first contacts the outer wall of the first half of the inner pipe 502 and heats the gas inside the inner pipe 502 through heat conduction, causing the gas volume to expand and the pressure to increase. Subsequently, the gas in the first half expands due to heat, which compresses the sealing plug 503, causing the second half to flow towards the hose 10. Furthermore, the connection port between the hose 10 and the inner pipe 502 has a partial protrusion, which can initially block the sealing plug 503 and prevent it from exceeding its range. The expansion bladder 4 expands as the gas pressure increases, and its expansion range changes in real time according to the temperature of the coolant, further monitoring the temperature of various areas of the battery pack body 2.

[0029] In this embodiment, as Figure 4 and Figure 5As shown, the lower surface of the negative pressure pipe 3 is provided with ventilation grooves 301 corresponding to the position of each inflatable airbag 4. The bottom of the negative pressure pipe 3 is equipped with a side baffle 302. The two sides of the inflatable airbag 4 are respectively bonded to two lightweight baffles 6. The expansion and contraction of the inflatable airbag 4 drives the two lightweight baffles 6 to open and close along the inner wall of the negative pressure pipe 3, which is accompanied by the change of the cross-sectional area of ​​the ventilation groove 301.

[0030] It should be noted that the negative pressure pipe 3 is installed inside the car and connected to the car's negative pressure system at the end for exhausting hot air. It can be located on one side of the battery pack body 2. The expansion airbags 4 and ventilation slots 301 are distributed in a one-to-one correspondence. The side baffle 302 can ensure that the air from the negative pressure pipe 3 can only be exhausted to one side of the battery pack body 2. An independent adjustment unit is provided between every two battery pack bodies 2 to form a local area monitoring. When the temperature of a local area is high, the expansion airbag 4 in that area will first expand due to heat. Furthermore, at the same time, the gas in the first half of the inner pipe 502 is also heated by the coolant. In this embodiment, the inner pipe 502 is made of high borosilicate glass with high thermal conductivity, which can quickly transfer the heat of the coolant to the gas inside the inner pipe 502. The gas molecules begin to expand, squeezing the gas in the second half into the hose 10, and then into the expansion bladder 4 through the hose 10, which helps the gas molecules expand rapidly. This further drives the two lightweight baffles 6 attached to both sides of the expansion bladder 4 to open and close synchronously with the increase in the volume of the expansion bladder 4. The lightweight baffles 6 and the negative pressure pipe 3 are slidably connected by pulleys and slide rails, resulting in less frictional resistance.

[0031] In this embodiment, the expansion airbag 4 not only senses changes in ambient temperature, but also receives changes in the temperature of the battery pack body 2 itself, forming a dual drive. This allows the expansion airbag 4 to quickly receive and change the temperature signals of the battery pack body 2. When the temperature rises, the expansion airbag 4 expands and pushes outward the two lightweight baffles 6, causing the lightweight baffles 6 to slide outward along the inner wall of the negative pressure pipe 3. This increases the cross-sectional area of ​​the ventilation slot 301 and improves the overall heat exchange efficiency of the area. Similarly, when the temperature drops, the inflatable airbag 4 contracts, pulling the lightweight baffle 6 back to its original position and sliding inward. The cross-sectional area of ​​the ventilation slot 301 shrinks. Each set of corresponding lightweight baffles 6 and inflatable airbags 4 only adjusts the ventilation slot 301 above themselves, without affecting other areas, thus achieving independent control and allocating heat dissipation resources as needed. The efficiency of the entire gas replacement process is random and dynamic. Areas with higher temperatures have better gas replacement efficiency, while areas with relatively lower temperatures have lower efficiency. Without changing the power of the vehicle's negative pressure system, effective overall heat dissipation can be achieved under the existing mode. Compared to the traditional method of blindly increasing airflow and using airflow adjustment to compensate for insufficient cooling effect in the latter half of the process, this method uses fixed energy consumption to meet the needs of dynamic heat dissipation. Moreover, compared to the traditional fixed air duct size, this heat dissipation mode can also reduce the ventilation area of ​​all ventilation slots 301 in normal temperature mode to avoid excessive air cooling, thus preventing excessive cold air supply from causing the battery temperature to deviate from the optimal range. Furthermore, by dynamically adjusting the ventilation area, the dependence of the battery pack body 2 on the vehicle's air cooling system is reduced, reducing the demand for cold air in this area and thus reducing the operating load of the entire vehicle's air cooling system. This method is more energy-efficient and improves the safety and stability of battery operation.

[0032] In this embodiment, as Figure 8 As shown, the gas compensation mechanism 9 also includes an auxiliary air tube 901 inserted into the top of the inflatable airbag 4. An injection tube 902 is inserted into the top of the auxiliary air tube 901. A piston 903 is slidably connected to the inner wall of the injection tube 902. The outer wall of the injection tube 902 is fixedly connected to the negative pressure pipe 3. A first connecting rod 904 is rotatably connected to the top of the piston 903. A second connecting rod 905 is rotatably connected to the top of the first connecting rod 904.

[0033] The balance bar 906 is rotatably connected to the negative pressure pipe 3 via a shaft, and a protrusion 908 is provided at one end of the balance bar 906 near the second connecting rod 905. A buzzer alarm 12 is installed on the outer wall of the negative pressure pipe 3 near the lower part of the balance bar 906 via bolts.

[0034] It should be noted that the outer wall of the injection tube 902 is fixedly connected to the negative pressure pipe 3, providing basic support for the entire gas compensation mechanism 9. Through the double linkage transmission, the piston 903 inside the injection tube 902 moves back and forth. In the initial stage, the piston 903 is located at the top of the injection tube 902, and air is also injected into the injection tube 902. The air pressure of the injection tube 902 and the expansion bladder 4 presses against the first linkage 904 and the second linkage 905 to prevent the balance bar 906 from rotating. After sensing that the expansion bladder 4 has shrunk, in order to maintain the basic ventilation function of the ventilation slot 301, the piston 903 slides to re-inject gas into the expansion bladder 4 to prevent it from fluctuating too much due to the influence of the external temperature.

[0035] Specifically, when the outside temperature is low due to seasonal influences, the inflatable airbag 4 begins to contract, causing the lightweight baffles 6 on both sides to move towards the center simultaneously. In this embodiment, an X-telescopic frame is also provided between the lightweight baffles 6 on both sides, and the fulcrum in the middle of the X-telescopic frame is connected to the inner wall of the negative pressure pipe 3. The lightweight baffles 6 on both sides are closed simultaneously through the X-telescopic frame. As the inflatable airbag 4 expands, the lightweight baffle 6 on the left slides inward to the critical position. The magnetic sheet 11 on the inner wall of the lightweight baffle 6 moves synchronously to the side of the magnetic ball 907. The magnetic sheet 11 and the magnetic ball 907 are of the same magnetic pole. If they are both N poles, when the distance between them is small, a strong repulsive force is generated. The magnetic ball 907 is pushed upward in the balance rod 906 and slides away from the magnetic sheet 11, causing the balance rod 906 to rotate clockwise around the pivot point. This causes the second connecting rod 905 to move downward, squeezing the first connecting rod 904 and the piston 903. This further causes the piston 903 to move downward synchronously, slowly squeezing the gas in the injection tube 902 to flow into the inflatable airbag 4, causing it to expand back to its original volume. Additionally, it should be noted that the inflation of the 902 injection tube is not triggered by "the balloon contracting", but rather requires the specific condition of "contracting to the critical position" to be met. For example, the diameter of the inflatable airbag 4 in normal state is 30 cm. The critical threshold set by the present invention is 20 cm. At this time, the inflatable airbag 4 is left with a 10 cm shrinkage space. When the temperature change near the inflatable airbag 4 is small, the magnetic ball 907 will not be triggered, whether the inflatable airbag 4 shrinks or expands, as long as it is not less than 20 cm. Only when the inflatable airbag 4 leaks due to long-term use, or when the overall temperature of the external environment drops in winter, will the inflatable airbag 4 gradually shrink to less than 20 cm. At this time, the spacing between the lightweight baffles 6 will be closer, and the magnetic sheet 11 on the inner wall of the left lightweight baffle 6 will move to the effective repulsion distance with the magnetic ball 907. The same magnetic poles need to be close together to generate a strong repulsion force. At this time, the magnetic ball 907 will be triggered. After sliding in the balance bar 906 and driving the balance bar 906 to rotate, it will squeeze the piston 903 through the double connecting rod, triggering the injection tube 902 to replenish air and slowly inflate the inflatable airbag 4. The goal of replenishing air is to maintain the minimum ventilation configuration, which is to maintain a basic ventilation capacity of the inflatable airbag 4 and prevent the inflatable airbag 4 from completely collapsing and causing airflow blockage. The piston 903 does not need to "actively reset". Its working mode is to release gas in a one-way progressive manner, which is to ensure that the inflatable airbag 4 is maintained at more than 30 cm. Initially, the inflatable airbag 4 has a diameter of 30 cm. At this time, the gas molecules in the inflatable airbag 4 and the injection tube 902 are sufficient, and the gas pressure is relatively high, generating a certain supporting force to support the balance rod 906. As the overall external temperature drops, the diameter of the inflatable airbag 4 is exposed to the outside environment. As the temperature decreases, the gas molecules begin to contract. Alternatively, due to long-term use, the inflatable airbag 4 may leak. Regardless of the reason, the inflatable airbag 4 will gradually shrink. The shrinkage process is also gradual. When the inflatable airbag 4 first shrinks to 20 cm, it reaches the critical threshold of 20 cm mentioned above. At this time, the magnetic sheet 11 and the magnetic force... Ball 907 also begins to be triggered for the first time. During the triggering process, once the magnetic ball 907 is triggered, it will slide along the balance bar 906. During the sliding process, the balance bar 906 rotates. On the one hand, the balance bar 906 generates a downward thrust, and on the other hand, the air pressure of the expansion bladder 4 decreases. Under the dual drive, the piston 903 begins to move down for the first time, squeezing some of the gas in the injection tube 902 and injecting it into the expansion bladder 4 until the diameter of the expansion bladder 4 recovers from 20 cm to 30 cm. At this time, when the air pressure of the expansion bladder 4 increases again, the increased air pressure generates resistance, and the piston 903 stops sliding down. When the inflatable airbag 4 shrinks to 20 cm again due to air leakage, a pressure difference is created between the inflatable airbag 4 and the injection tube 902. Since the magnetic ball 907 was triggered the first time, the balance rod 906 remains tilted. Whenever a pressure difference is created again, the balance rod 906 tilts again, continuing to compress the piston 903 and causing it to slide down a second time. After sliding a certain distance, the increased pressure creates resistance, stopping the piston 903 from sliding down. Therefore, the process of the injection tube 902 replenishing the inflatable airbag 4 is continuous, stable, and phased, replenishing only what is needed. This process is not a one-time event but a repeated replenishment process until the internal gas is completely consumed. At this point, the balance rod 906 has its maximum tilt, and the protrusion 908 at one end of the balance rod 906 simultaneously triggers the buzzer alarm 12, providing an automatic alert without manual monitoring. Then, the injection tube 902 is replenished with gas again for the next round of operation.

[0036] In addition, a pressure alarm mechanism is added. A protrusion 908 is fixedly connected to one end of the stabilizer bar 906. When the stabilizer bar 906 rotates, the protrusion 908 begins to make a circle, and the buzzer alarm 12 is triggered by the protrusion 908. The alarm mechanism is connected to the vehicle system, making it easy for the operator to detect the problem in time.

[0037] It should also be noted that the injection tube 902 in this embodiment is equipped with two one-way solenoid valves at both ends of the bottom. The one-way solenoid valve on the left is used to control the one-way flow of gas into the expansion bladder 4, and the one-way solenoid valve on the right is used to replenish gas to the injection tube 902. When injecting gas after the solenoid valve on the right is opened, the solenoid valve on the left must be closed to prevent gas from being injected into the expansion bladder 4.

[0038] In this embodiment, as Figure 2 and Figure 3 As shown, the upper surface of the mounting plate 1 is provided with several strip heat exchange grooves 13, and the front of the mounting plate 1 is provided with several air inlets 14. The inner wall of the air-cooled pipe 7 is provided with several exhaust grooves corresponding to the position of the battery pack body 2. It should be noted that the air-cooling pipe 7 is connected to the car's air intake system to input natural cold air. The heat exchange slot 13 is used to assist the battery pack body 2 in heat exchange with the cooling pipe 8 at the bottom. Several air inlets 14 are opened on the front to introduce part of the airflow blown from the air-cooling pipe 7. Part of the airflow passes through the cooling pipe 8 to achieve a combination of air cooling and water cooling. Then, it passes through the heat exchange slot 13 above to accelerate the heat exchange function between the mounting plate 1 and the battery pack body 2. At the same time, it is discharged from the heat exchange slot 13. Another part of the airflow is directly laid on the outer surface of the battery pack body 2 and is recovered by the negative pressure pipe 3 to form a complete airflow channel, improve the heat dissipation effect, and avoid airflow turbulence.

[0039] Working principle: When using this heat dissipation device, the car's air-cooling system and negative pressure system are first activated to achieve overall airflow circulation; Next, the temperature of each area of ​​the battery pack body 2 is sensed by the inflatable airbag 4 to maintain a stable heat dissipation and ventilation effect; Specifically, when the ambient temperature and coolant temperature are low, all the expansion airbags 4 are at their minimum contraction range, the lightweight baffles 6 are slightly open and closed, and all the ventilation slots 301 maintain the minimum cross-sectional area to ensure that the airflow channels in each area are stably exhausting, maintaining basic heat dissipation and ventilation, and the heat dissipation efficiency is relatively consistent. As the battery pack body 2 operates for longer, it begins to dissipate heat, transferring the heat to the outside air and activating water cooling. Coolant is injected from the inlet 801 of the leftmost cooling pipe 8, flows along the S-shaped cooling pipe 8, absorbs heat, enters the outer layer of the double-layer pipe 5 through the drain 802, and then flows into the next cooling pipe 8 through the branch pipe 504, forming a water cooling cycle.

[0040] Dual temperature sensing effect triggered: The temperature in the local area is high, and the expansion airbag 4 expands due to heat. The heat absorbed by the mounting plate 1 causes the temperature of the coolant in the cooling pipe 8 to rise. The heat is transferred to the outer layer of the double-layer pipe 5, which heats the gas in the first half of the inner pipe 502, squeezing the sealing plug 503 to move. The gas in the second half is squeezed, leaving the hose 10 and the expansion airbag 4, which assists the expansion airbag 4 to expand quickly. When the expansion airbag 4 expands, it drives the lightweight baffles 6 on both sides to slide outward along the inner wall of the negative pressure pipe 3. The cross-sectional area of ​​the ventilation slot 301 increases. The larger cross-sectional area reduces the local resistance when the hot air passes through the ventilation slot 301, increasing the airflow per unit time. The efficiency of hot air discharge in this area is improved. During the flow of coolant, the higher the temperature, the more obvious the expansion of the gas in the inner layer of the double-layer pipe 5. Correspondingly, the expansion amplitude of the expansion airbag 4 is larger and the opening and closing degree of the lightweight baffles 6 is higher. Only the ventilation volume in this area increases, further improving the heat dissipation efficiency in this area. This makes up for the defect that the heat dissipation efficiency gradually decreases as the coolant temperature gradually rises during water cooling. After the battery pack body 2 is closed, the water cooling system is closed. After the coolant outside the inner layer pipe 502 is recovered, the inner layer gas contracts, the sealing plug 503 resets, and the expansion airbag 4 loses the auxiliary inflation power and further contracts back to its original volume.

[0041] Gas compensation at low temperatures: When affected by the season, the outside temperature drops, or the gas inside the expansion bladder 4 is lost, the temperature of the battery pack body 2 drops, the ambient temperature around the battery decreases, and the temperature environment around the expansion bladder 4 is relatively low. The gas molecules begin to contract. When the bladder contracts to the critical position, the two lightweight baffles 6 move towards the center, and the magnetic sheet 11 on the inner wall of the left lightweight baffle 6 moves to the vicinity of the magnetic ball 907. The same polarity magnet generates a repulsive force, pushing the magnetic ball 907 to slide inside the balance bar 906. The sliding magnetic ball 907 drives the balance bar 906 to rotate clockwise around the shaft, which squeezes the piston 903 in the injection tube 902 through the second connecting rod 905 and the first connecting rod 904. The piston 903 moves down and injects the gas in the injection tube 902 into the expansion air bag 4 through the left one-way solenoid valve, pushing the expansion air bag 4 to return to the minimum ventilation state, ensuring that the ventilation slot 301 is not blocked and the basic airflow circulation is not interrupted. Alarm prompt: When the balance bar 906 rotates, the protrusion 908 at its end triggers the buzzer alarm 12, which emits an audible and visual alarm, prompting maintenance personnel to replenish gas to the injection tube 902 through the one-way solenoid valve on the right side of the injection tube 902. When replenishing, the left solenoid valve should be closed to prevent gas from flowing into the expansion bladder 4 and causing over-inflation. Furthermore, it should be noted that the actual number of expansion airbags 4, ventilation slots 301, cooling pipes 8, and double-layer pipes 5 assembled in this embodiment can be adjusted according to the size of the battery pack. For example, when the overall volume of the battery pack is small, the volume of all components such as expansion airbags 4, ventilation slots 301, cooling pipes 8, and double-layer pipes 5 can be reduced proportionally, and the number of expansion airbags 4, cooling pipes 8, and double-layer pipes 5 assembled can be reduced. In addition, the positions of expansion airbags 4, cooling pipes 8, and double-layer pipes 5 can be reasonably allocated according to the actual shape of the battery pack to ensure that expansion airbags 4 and ventilation slots 301 are always aligned with the core heat-generating parts of the battery pack.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat dissipation structure for a new energy battery, comprising a mounting plate (1) and a battery pack body (2) placed on the upper surface of the mounting plate (1), characterized in that: It also includes a negative pressure pipe (3) located on one side of the battery pack body (2) for discharging hot air, and several expansion airbags (4) located on the negative pressure pipe (3) that can automatically expand and contract according to the temperature of each area of ​​the battery pack body (2). Each expansion airbag (4) has two lightweight baffles (6) on both sides that can automatically adjust the opening and closing degree to adjust the local heat dissipation efficiency. A double-layer pipe (5) is provided on one side of the expansion airbag (4) to inject gas into the expansion airbag (4). A gas compensation mechanism (9) is provided on the top of the expansion airbag (4) to control the minimum contraction amplitude of the expansion airbag (4). The gas compensation mechanism (9) includes a second link (905), a balance bar (906) is rotatably connected to the top of the second link (905), and a magnetic ball (907) is slidably connected inside the balance bar (906). Among them, a magnetic sheet (11) is bonded to the inner wall of the lightweight baffle (6) located on the left side of the inflatable airbag (4), and the magnetic sheet (11) has the same magnetism as the magnetic ball (907). The other side of the battery pack body (2) is provided with an air-cooling pipe (7).

2. The heat dissipation structure for a new energy battery according to claim 1, characterized in that: The mounting plate (1) is equipped with several cooling pipes (8). Two adjacent cooling pipes (8) are connected by a double-layer pipe (5). The cooling pipes (8) are designed as continuously bent S-shaped pipes, and the two ends of the cooling pipes (8) are respectively connected to a water inlet (801) and a drain outlet (802).

3. The heat dissipation structure for a new energy battery according to claim 2, characterized in that: The double-layer pipe (5) is divided into an outer pipe (501) and an inner pipe (502). The inner wall of the inner pipe (502) is slidably connected with a sealing plug (503). One end of the outer pipe (501) is provided with several branch pipes (504). The drain outlet (802) of the cooling pipe (8) is connected to the outer pipe (501). The inlet (801) of the cooling pipe (8) is connected to the branch pipes (504).

4. The heat dissipation structure for a new energy battery according to claim 3, characterized in that: The first half of the inner pipe (502) is located inside the outer pipe (501), and the second half of the inner pipe (502) extends to the outside of the outer pipe (501). A flexible hose (10) is inserted into the side curved surface of the inner pipe (502), and the flexible hose (10) is connected to the inflatable airbag (4).

5. The heat dissipation structure for a new energy battery according to claim 1, characterized in that: The lower surface of the negative pressure pipe (3) is provided with ventilation grooves (301) corresponding to the position of each expansion airbag (4). The bottom of the negative pressure pipe (3) is equipped with a side baffle (302). The two sides of the expansion airbag (4) are respectively bonded to two lightweight baffles (6). The expansion and contraction of the expansion airbag (4) drives the two lightweight baffles (6) to open and close along the inner wall of the negative pressure pipe (3), and the cross-sectional area of ​​the ventilation groove (301) changes accordingly.

6. The heat dissipation structure for a new energy battery according to claim 1, characterized in that: The gas compensation mechanism (9) also includes an auxiliary air tube (901) inserted into the top of the inflatable airbag (4). An injection tube (902) is inserted into the top of the auxiliary air tube (901). A piston (903) is slidably connected to the inner wall of the injection tube (902). The outer wall of the injection tube (902) is fixedly connected to the negative pressure pipe (3). A first connecting rod (904) is rotatably connected to the top of the piston (903). A second connecting rod (905) is rotatably connected to the top of the first connecting rod (904).

7. The heat dissipation structure for a new energy battery according to claim 6, characterized in that: The balance bar (906) and the negative pressure pipe (3) are rotatably connected by a shaft, and a protrusion (908) is provided at one end of the balance bar (906) near the second connecting rod (905). A buzzer alarm (12) is installed on the outer wall of the negative pressure pipe (3) near the lower part of the balance bar (906) by bolts.

8. The heat dissipation structure for a new energy battery according to claim 1, characterized in that: The upper surface of the mounting plate (1) is provided with several strip heat exchange grooves (13), and the front of the mounting plate (1) is provided with several air inlets (14). The inner wall of the air-cooled pipe (7) is provided with several exhaust grooves corresponding to the position of the battery pack body (2).

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