A heat dissipation device and heat dissipation method for a battery pack of a wind turbine generator set

Abstract

The present invention relates to the technical field of wind power generation, and specifically to a heat dissipation device and heat dissipation method for a battery pack of a wind turbine, comprising a base, a heat conduction mechanism is arranged on the base, the heat conduction mechanism absorbs the heat generated by the battery pack, a cylinder is arranged on one side of the top surface of the base, a heat dissipation mechanism is arranged inside the cylinder, the heat dissipation mechanism comprises a motor, the motor is fixedly arranged in the middle of the inner bottom surface of the cylinder, the base and the lower part of the cylinder are both provided with an air cavity, the air cavity is connected with the inside of the cylinder, the output end of the motor is coaxially fixedly connected with a base rod, the outer wall of the base rod is provided with an exhaust fan, an inner cylinder is arranged above the base rod, the inner cylinder is coaxially fixedly connected with the inside of the cylinder, a flow guide mechanism is arranged inside the inner cylinder, and the flow guide mechanism guides the circulation of water flow. The present invention can combine the advantages of the two cooling methods of water cooling and air cooling, and can reduce the cooling effect while reducing energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a heat dissipation device and a heat dissipation method for a battery pack of a wind turbine generator set. Background Art

[0002] A wind turbine generator set includes a wind wheel, a generator and a wind power source, wherein the wind power source consists of a wind turbine generator set, a tower supporting the generator set, a battery charge controller, an inverter, a load unloader, a grid connection controller, a battery pack, etc. Due to the thermal effect of current, the wind turbine generator set will cause the battery pack to heat up when storing electricity in the battery pack. The battery packs equipped with wind turbines are usually large in number and stacked together. If the heat generated during the storage process is not dissipated in time, it is very easy to cause the battery pack to overload or even cause a fire.

[0003] The current heat dissipation method for battery packs is generally through air cooling or water cooling. The former is to disturb the air in the place where the battery pack is located or the equipment rack area through the air intake and exhaust system, so that the external air passes through the location of the battery pack more quickly and takes away the heat. The latter absorbs the heat generated by the battery pack through water, and then centrally cools the water, thereby ultimately achieving the purpose of quickly removing the heat from the battery pack.

[0004] The two existing methods each have their own advantages and disadvantages. Among them, the water cooling method is more commonly used because of its high heat dissipation efficiency and little impact on the environment. However, this method requires the combination of a water pump and a fan to achieve effective heat dissipation, which will undoubtedly greatly increase energy consumption. In view of this, the present invention proposes a heat dissipation device and heat dissipation method for a battery pack of a wind turbine. Summary of the invention

[0005] Technical issues solved

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a heat dissipation device and a heat dissipation method for a battery pack of a wind turbine generator set, which can effectively solve the problems in the prior art.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The present invention provides a heat dissipation device and heat dissipation method for a battery pack of a wind turbine generator set, comprising a base, on which a heat conduction mechanism is provided, and the heat conduction mechanism absorbs the heat generated by the battery pack;

[0010] A cylinder is provided on one side of the top surface of the base, and a heat dissipation mechanism is provided inside the cylinder. The heat dissipation mechanism includes a motor, and the motor is fixedly arranged in the middle of the inner bottom surface of the cylinder. The base and the lower part of the cylinder are both provided with an air cavity, and the air cavity is connected with the inside of the cylinder. The output end of the motor is coaxially fixedly connected with a base rod, and an exhaust fan is provided on the outer wall of the base rod;

[0011] An inner cylinder is arranged above the base rod, the inner cylinder is coaxially fixedly connected with the inside of the cylinder, and a flow guiding mechanism is arranged inside the inner cylinder to guide the water flow to circulate.

[0012] Preferably, the heat conduction mechanism includes two square tubes arranged above the base, the bottom surface of the square tube located at the lower part is connected and fixed to the base, the square tubes are arranged in a rectangular ring structure, both ends of the square tubes are located close to the side of the cylinder and are not connected to each other, the rear ends of the two square tubes are connected by a vertical tube, the front ends of the two square tubes are connected to connecting tubes, the connecting tube located on the lower side is a Z-shaped structure, and the two ends of the connecting tubes successively penetrate the outer wall of the cylinder and the outer wall of the inner cylinder and extend to the inside of the inner cylinder.

[0013] Preferably, a water outlet pipe is penetrated through the side wall of the square tube located on the lower side away from the cylinder, and a threaded plug is threadedly connected to the open end of the water outlet pipe on the side away from the cylinder, and a thermal conductive pad is fixedly provided on the inner wall of the square tube, and the thermal conductive pad is a U-shaped structure, and two first heat conductive plates are provided between the two square tubes in a front-to-back symmetrical structure, and a plurality of second heat conductive plates are evenly fixedly provided on the upper and lower outer walls of the first heat conductive plates in a linear and evenly spaced structure, and the second heat conductive plate is a Z-shaped structure and its upper end penetrates through the outer wall of the adjacent square tube and extends into the interior thereof, and a plurality of heat dissipation plates are fixedly provided on the outer side wall of the first heat conductive plate in a linear and evenly spaced structure, and a plurality of heat dissipation grooves are evenly provided on the heat dissipation plates.

[0014] Preferably, the inner cylinder is a T-shaped cylindrical structure, and a cavity and an inner cavity are respectively opened in the middle of the top surface and the lower side of the inner cylinder, and the interiors of the upper and lower connecting tubes are respectively connected with the lower end of the cavity and the upper end of the inner cavity, and partitions are provided inside the two connecting tubes close to the cylinder side, and hinge shafts are fixed on the bottom surface of the upper partition away from one end of the cylinder and the bottom surface of the lower partition close to one end of the cylinder, and the two hinge shafts are respectively rotatably connected to the inner walls of the upper and lower square tubes, and a plurality of torsion springs are sleeved on the hinge shafts.

[0015] Preferably, the flow guide mechanism includes a piston plate arranged at the lower part of the inner cavity, the piston plate slidingly cooperates with the inner cavity, the bottom surface of the piston plate is coaxially fixedly connected with a sliding rod, the bottom surface of the inner cavity is provided with a rod groove slidingly cooperates with the sliding rod, the lower end of the outer wall of the sliding rod is annularly and evenly spaced structure and is fixed with a plurality of limit blocks, the inner wall of the base rod is provided with a limit groove slidingly cooperates with the limit block, the upper inner wall of the rod groove is fixed with a guide block, the guide block is a hemispherical structure, the outer wall of the slide rod is provided with a bidirectional threaded groove slidingly cooperates with the guide block, a transfer tube is coaxially penetrated and rotatably connected between the inner cavity and the cavity, a plurality of guide rods are evenly fixed on the middle part of the top surface of the piston plate, and the bottom surface of the transfer tube is provided with a guide groove slidingly cooperates with the guide rod.

[0016] Preferably, a spiral tube is provided above the transfer tube, and two flared tubes are symmetrically connected to the upper and lower ends of the spiral tube, the flared tube located at the lower part is coaxially fixedly connected to the upper end of the transfer tube, a plurality of sleeves are evenly fixedly provided on the inner wall of the upper open end of the transfer tube, an extension rod is elastically connected to the inner bottom surface of the sleeve through a tension spring, a circular plate that slides with the inside of the transfer tube is fixedly provided between the upper ends of the plurality of extension rods, the upper end of the flared tube located on the upper side is coaxially fixedly connected to a swivel through two symmetrically fixed extrusion rods, and the swivel is rotatably connected to the inner wall of the cavity.

[0017] Preferably, a round box is fixedly provided at the upper end of the inner wall of the cavity, and the round box is an annular structure with a U-shaped cross-section, and a plurality of circular grooves are evenly arranged on the bottom surface of the round box, and a feed tray is rotatably connected inside the circular groove, and the outer wall of the feed tray is an annular structure with equal spacing and a plurality of feed grooves are arranged, and the feed groove is a V-shaped structure, and the side wall of the extrusion rod is in extrusion contact with the inner wall of one side of the feed groove.

[0018] Preferably, an air inlet pipe is provided between any two adjacent heat dissipation plates, the upper end of the air inlet pipe is a closed structure, the lower end of the air inlet pipe passes through the top surface of the base, extends to the inside of the wind cavity and is connected with the inside of the wind cavity, a plurality of air inlets are evenly provided on the side wall of the air inlet pipe, a plurality of air inlets are evenly provided on the top surface of the wind cavity, the upper part of the cylinder is a truncated cone-shaped structure with a larger upper portion and a smaller lower portion, the inner top surface of the cylinder is an arc surface structure with a height gradually decreasing from the outside to the inside, and the diameter of the open end of the cylinder is smaller than the inner diameter of the round box.

[0019] A heat dissipation method for a wind turbine battery group heat dissipation device, the steps are as follows:

[0020] S1. Pour cold water into the cavity from the open end of the cylinder;

[0021] S2, using the flow guide mechanism to make the water in the cavity circulate inside the two square tubes and the inner cylinder;

[0022] S3, helping the water in the inner cylinder and the plurality of heat sinks to dissipate heat via the heat dissipation mechanism;

[0023] S4. When the heat dissipation mechanism and the diversion mechanism are in operation, then Glauber's salt will be added to the water flow in the cavity. The diversion mechanism can temporarily concentrate the water flow in the cavity, and then help the water flow to dissipate heat quickly through the heat absorption and dissolution characteristics of Glauber's salt.

[0024] Beneficial Effects

[0025] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] 1. The present invention is provided with a heat conduction mechanism, through which the heat in the battery pack can be fully discharged and cooled through the heat dissipation mechanism. Under the action of the exhaust fan and the piston plate that moves up and down, the device can combine the advantages of both water cooling and air cooling, thereby reducing the cooling effect and energy consumption.

[0027] 2. The present invention is provided with air inlet pipes staggered with the heat sink, and a plurality of air inlets corresponding to the gap positions in the battery pack, so that the wind force of the exhaust fan can be fully used for heat dissipation. Compared with the existing direct blowing operation of air cooling, this heat dissipation method is more concentrated and efficient, and the design is ingenious.

[0028] 3. The present invention is provided with a round box and a spiral tube. When the water flows through the spiral tube and the water inside the cavity is stirred by the spiral tube, the volatilization of heat in the water can be improved. At the same time, the arc structure on the inner top surface of the cylinder guides the wind to the cavity, further improving the volatilization of heat in the water. In addition, the round box continuously adds Glauber's salt as the device operates, thereby ensuring that the water flow always has a large temperature difference with the battery pack, so that it can fully absorb the heat generated by the battery pack, thereby enhancing the heat dissipation effect of the device on the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention;

[0032] Figure 3 It is a schematic diagram of the cross-sectional structure of a square tube of the present invention;

[0033] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of a cylinder of the present invention;

[0035] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0036] Figure 7 It is a schematic diagram of the exhaust fan structure of the present invention;

[0037] Figure 8 It is a schematic diagram of the cross-sectional structure of the transfer tube of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of the connection relationship between the spiral tube and the round box of the present invention;

[0039] Fig.10 It is a schematic diagram of the side structure of the heat conduction mechanism.

[0040] The numbers in the figure represent: 1, base; 2, heat conduction mechanism; 3, cylinder; 4, heat dissipation mechanism; 5, motor; 6, air cavity; 7, base rod; 8, exhaust fan; 9, inner cylinder; 10, flow guide mechanism; 11, water outlet pipe; 12, threaded plug; 13, square pipe; 14, vertical pipe; 15, connecting pipe; 16, thermal pad; 17, first thermal conductive plate; 18, second thermal conductive plate; 19, heat dissipation plate; 20, heat dissipation groove; 21, cavity; 22, inner cavity; 23, partition; 24, hinge shaft; 25, torque Spring; 26, piston plate; 27, slide rod; 28, rod groove; 29, limit block; 30, limit groove; 31, guide block; 32, two-way thread groove; 33, transfer tube; 34, guide rod; 35, guide groove; 36, spiral tube; 37, flaring tube; 38, sleeve; 39, tension spring; 40, extension rod; 41, round plate; 42, extrusion rod; 43, swivel; 44, round box; 45, round groove; 46, feed tray; 47, feed trough; 48, air inlet pipe; 49, air inlet; 50, air inlet. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0042] A wind turbine battery heat dissipation device and heat dissipation method, referring to Figure 1-Figure 10, including a base 1, on which a heat conduction mechanism 2 is provided, and the heat conduction mechanism 2 absorbs the heat generated by the battery pack. The heat conduction mechanism 2 includes two square tubes 13 arranged above the base 1, and the bottom surface of the square tube 13 located at the lower part is connected and fixed to the base 1, and the square tubes 13 are arranged in a rectangular ring structure. Both ends of the square tubes 13 are located near the side of the cylinder 3 and are not connected to each other. The rear ends of the two square tubes 13 are connected through a vertical tube 14. The front ends of the two square tubes 13 are connected to a connecting tube 15. The connecting tube 15 located on the lower side is a Z-shaped structure. The ends of the two connecting tubes 15 successively penetrate the outer wall of the cylinder 3 and the outer wall of the inner cylinder 9 and extend to the inside of the inner cylinder 9. The square tube 1 located on the lower side A water outlet pipe 11 is penetrated through the wall of one side away from the cylinder 3, and a threaded plug 12 is threadedly connected to the open end of the water outlet pipe 11 on the side away from the cylinder 3. A heat conductive pad 16 is fixedly disposed on the inner wall of the square tube 13, and the heat conductive pad 16 is a square-shaped structure. Two first heat conductive plates 17 are arranged between the two square tubes 13 in a front-to-back symmetrical structure. A plurality of second heat conductive plates 18 are evenly fixedly disposed on the upper and lower outer walls of the first heat conductive plate 17 in a linear and equidistant structure. The second heat conductive plate 18 is a Z-shaped structure and its upper end penetrates through the outer wall of the adjacent square tube 13 and extends to the inside thereof. A plurality of heat dissipating plates 19 are fixedly disposed on the outer wall of the first heat conductive plate 17 in a linear and equidistant structure, and a plurality of heat dissipating grooves 20 are evenly disposed on the heat dissipating plates 19.

[0043] A cylinder 3 is provided on one side of the top surface of the base 1, and a heat dissipation mechanism 4 is provided inside the cylinder 3. The heat dissipation mechanism 4 includes a motor 5, which is fixedly arranged in the middle of the inner bottom surface of the cylinder 3. An air cavity 6 is provided at the base 1 and the lower part of the cylinder 3, and the air cavity 6 is connected to the inside of the cylinder 3. A base rod 7 is coaxially fixedly connected to the output end of the motor 5, and an exhaust fan 8 is sleeved on the outer wall of the base rod 7. The inner cylinder 9 is a T-shaped cylindrical structure, and a cavity 21 and an inner cavity 22 are respectively provided in the middle of the top surface and the lower side of the inner part of the inner cylinder 9. The interiors of the upper and lower connecting pipes 15 are respectively connected to the lower end of the cavity 21 and the upper end of the inner cavity 22. A partition 23 is provided inside the two connecting pipes 15 near the cylinder 3. A hinge shaft 24 is fixedly provided on the bottom surface of the upper partition 23 away from the end of the cylinder 3 and the bottom surface of the lower partition 23 near the cylinder 3. The two hinge shafts 24 are respectively rotatably connected to the inner walls of the upper and lower square tubes 13, and a plurality of torsion springs 25 are sleeved on the hinge shaft 24.

[0044] An inner cylinder 9 is arranged above the base rod 7, and the inner cylinder 9 is coaxially fixedly connected to the inside of the cylinder 3. A flow guiding mechanism 10 is arranged inside the inner cylinder 9, and the flow guiding mechanism 10 guides the water flow to circulate. The flow guiding mechanism 10 includes a piston plate 26 arranged at the lower part of the inner cavity 22, and the piston plate 26 is slidably matched with the inner cavity 22. A sliding rod 27 is coaxially fixedly connected to the bottom surface of the piston plate 26. A rod groove 28 that is slidably matched with the sliding rod 27 is opened on the bottom surface of the inner cavity 22. The lower end of the outer wall of the sliding rod 27 is annular and evenly spaced. A limit block 29 is provided, a limit groove 30 which is slidably matched with the limit block 29 is provided on the inner wall of the base rod 7, a guide block 31 is fixedly provided on the inner wall on the upper side of the rod groove 28, the guide block 31 is a hemispherical structure, a bidirectional threaded groove 32 which is slidably matched with the guide block 31 is provided on the outer wall of the slide rod 27, a transfer tube 33 is coaxially penetrated and rotatably connected between the inner cavity 22 and the cavity 21, a plurality of guide rods 34 are evenly fixed on the middle part of the top surface of the piston plate 26, and a guide groove 35 which is slidably matched with the guide rod 34 is provided on the bottom surface of the transfer tube 33.

[0045] A spiral tube 36 is provided above the transfer tube 33, and two flared tubes 37 are symmetrically connected to the upper and lower ends of the spiral tube 36. The flared tube 37 located at the lower part is coaxially fixedly connected to the upper end of the transfer tube 33, and a plurality of sleeves 38 are evenly fixedly provided on the inner wall of the upper open end of the transfer tube 33. An extension rod 40 is elastically connected to the inner bottom surface of the sleeve 38 through a tension spring 39. A circular plate 41 that slides with the inside of the transfer tube 33 is fixedly provided between the upper ends of the plurality of extension rods 40. A swivel 43 is coaxially fixedly connected to the upper end of the flared tube 37 located on the upper side through two symmetrically fixed extrusion rods 42. The swivel 43 is rotatably connected to the inner wall of the cavity 21.

[0046] A round box 44 is fixedly provided at the upper end of the inner wall of the cavity 21. The round box 44 is an annular structure with a U-shaped cross-section. A plurality of round grooves 45 are evenly arranged on the bottom surface of the round box 44. A feed tray 46 is rotatably connected inside the round groove 45. The outer wall of the feed tray 46 is an annular structure with equal spacing and a plurality of feed grooves 47 are arranged. The feed groove 47 is a V-shaped structure. The side wall of the extrusion rod 42 is in extrusion contact with the inner wall of one side of the feed groove 47.

[0047] An air inlet pipe 48 is provided between any two adjacent heat dissipation plates 19. The upper end of the air inlet pipe 48 is a closed structure. The lower end of the air inlet pipe 48 passes through the top surface of the base 1 and extends to the inside of the wind cavity 6 and is connected with the inside of the wind cavity 6. A plurality of air inlets 49 are evenly provided on the side wall of the air inlet pipe 48, and a plurality of air inlets 50 are evenly provided on the top surface of the wind cavity 6. The upper part of the cylinder 3 is a truncated cone-shaped structure with a larger upper portion and a smaller lower portion. The inner top surface of the cylinder 3 is an arc surface structure with a gradually decreasing height from the outside to the inside. The diameter of the open end of the cylinder 3 is smaller than the inner diameter of the round box 44.

[0048] Working principle: the staff can fix the device in the room around the power generation part of the wind turbine. Before use, the staff needs to put water and sodium sulfate into the cavity 21 and the round box 44 from the open end of the cylinder 3, and then fix the battery pack used for power storage of the wind turbine on the base 1 of the device, and make the battery pack be on the inner side of the square tube 13. Because the battery pack is formed by assembling multiple batteries together, there are many joints in the battery pack. The spacing between the multiple air inlets 50 in the device is equal to the width of a single battery. After the stacking is completed, the position of the air inlet 50 will be exactly at the joints of the multiple batteries adjacent to the left and right rows. With the operation of the heat dissipation mechanism 4, the external air flow will pass through these gaps into the wind cavity 6 in the base 1 and take away the heat from the battery at the same time. On the other hand, the first heat conducting plate 17 and the heat conducting pad 16 are also provided on both sides of the battery pack. The two will fit tightly with the battery pack, and part of the heat generated during the power storage process of the battery pack will be absorbed into the inside of the two.

[0049] During the operation of the heat dissipation mechanism 4, the exhaust fan 8 is driven by the motor 5 to rotate, so that the outside air can be sucked into the wind cavity from the air inlet 49 and the air inlet 50. The opening sizes of the air inlet 49 and the air inlet 50 are relatively limited, and the wind force generated by the rotation of the exhaust fan 8 is relatively large, so the outside air will flow into the wind cavity 6 at a faster speed, and at the same time, it is also ensured that air flows into each opening. Because the position of the air inlet pipe 48 is set between two adjacent heat dissipation plates 19, the air will first be sucked into the gap between the two heat dissipation plates 19, thereby ensuring the contact surface between the air and the heat dissipation plates 19. In addition, the large number of heat dissipation grooves 20 provided on the heat dissipation plates 19 further increase the contact area between the heat dissipation plates 19 and the air, so that the heat on the heat dissipation plates 19 can be quickly brought into the wind cavity 6.

[0050] On the other side, the heat absorbed by the heat conductive pad 16 will be conducted to the square tube 13, which is filled with a large amount of water. The water will absorb the heat again and conduct the heat to the inside of the cylinder 3 through its own flow. The heat in the flowing water will also be conducted to the first heat conductive plate 17 through the second heat conductive plate 18. The positions of the two are relatively close to the air inlet pipe 48, so they can also receive the heat dissipation effect of the air sucked in by the air inlet pipe 48. The heat that is not conducted to the second heat conductive plate 18 will flow into the lower square tube 13 along the vertical pipe 14 to wait for the guide mechanism 10 to guide it into the inner cylinder 9 along with the water flow;

[0051] Under the continuous rotation of the motor 5, the base rod 7 thereon will also synchronously drive the slide bar 27 to rotate by the sliding cooperation relationship between the limit block 29 and the limit groove 30. When the slide bar 27 rotates, it will be squeezed by the guide block 31 in the rod groove 28. The guide block 31 can make the slide bar 27 reciprocate up and down by squeezing the inner wall of the bidirectional thread groove 32. When the slide bar 27 moves upward, it will push the piston plate 26 to rise and reduce the space between the top surface of the inner cavity 22 and its top surface. When the device is filled with cooling water, it is necessary to make the water level in the cavity 21 much higher than the upper connecting pipe 1 5 (and cannot be higher than the lower end of the lower expanded pipe 37), so under the effect of the communicating vessel principle, the two square pipes 13, the vertical pipe 14, the lower connecting pipe 15 and the inner cavity 22 will also be filled with water. Moreover, the two connecting pipes 15 are rotatably connected with the partitions 23 through the hinge shaft 24 and the torsion spring 25, and the rotatable direction of the two partitions 23 is also limited by the position of the hinge shaft 24. This makes the upper connecting pipe 15 only serve as a passage for the water flow in the cavity 21 to enter the upper square pipe 13, and the lower connecting pipe 15 can only serve as a passage for the water flow in the lower square pipe 13. The water flows into the inner cavity 22. Under this design, when the space above the piston plate 26 in the inner cavity 22 is compressed, the water cannot return to the lower square tube 13 from the lower connecting tube 15, and can only pass through the transfer tube 33 into the lower flared tube 37. When the piston plate 26 continues to rise and the water flow continues to be injected, the water will enter the spiral tube 36 and finally flow out from the open end of the upper flared tube 37 and fall into the cavity 21. In this process, the piston plate 26 is also connected to the slide rod 27 through the sliding connection between the guide rod 34 and the guide groove 35. The water flows through the spiral tube 36, and the special shape of the spiral tube 36 greatly increases the contact surface with the air, thereby improving the heat dissipation effect. At the same time, the water flows into the cavity 21 and is stirred by the spiral tube 36. Similarly, the air sucked into the air cavity 6 by the heat dissipation mechanism 4 will also flow upward from both sides of the inner cylinder 9, and will be introduced into the cavity 21 under the arc design of the inner top surface of the cylinder 3. In this way, the efficiency of heat being taken out of the cylinder 3 can be further improved, thereby increasing the heat dissipation speed of the water flow in the cavity 21.

[0052] At the same time, the squeezing rod 42 will continuously squeeze the inner wall of the feeding trough 47 during rotation to rotate the feeding tray 46. Each rotation of the feeding tray 46 will cause a feeding trough 47 filled with sodium sulfate on its upper part to rotate into the circular groove 45. Under the restriction of the inner wall of the circular groove 45, the sodium sulfate in the feeding trough 47 just transferred into the circular groove 45 will not fall into the cavity 21, and the feeding trough 47 that has just moved into the circular groove 45 will rotate downward and put the sodium sulfate in it into the water flow in the cavity 21, and then it will remain in place and wait for the next squeezing rod 42 to rotate to this point to squeeze its inner wall, so that it will deflect backward until the next one is loaded. The feeding trough 47 with the sodium sulfate rotates out of the circular trough 45, and the sodium sulfate put into the cavity 21 will react with the water. Because it has the characteristic of absorbing heat and dissolving, the water flow will be rapidly cooled down under the action of the sodium sulfate. The cooling will not only act on the water flow in the cavity 21, but also affect the water flow therein through the spiral tube 36. At this time, because the piston plate 26 is in an ascending state, the space above the inner cavity 22 will shrink smaller and smaller, and the water flow in the square tube 13 will not be able to be replenished into the inner cavity 22, so that the water in the cavity 21 will accumulate more and more, which can provide sufficient heat dissipation time for the water flow in the cavity 21 at this time;

[0053] When the piston plate 26 begins to descend with the continuous rotation of the slide bar 27, the space in the inner cavity 22 relative to the upper part of the piston plate 26 becomes larger, and the transfer tube 33 is elastically connected to the circular plate 41 through the sleeve 38, the tension spring 39 and the extension rod 40, so the interior of the transfer tube 33 also forms a structure similar to a one-way valve, so that water can only flow from bottom to top in the transfer tube 33, so the water in the lower square tube 13 will be poured into the inner cavity 22 again, and in such a reciprocating cycle, the heat generated by the battery pack can be taken away. The heat is discharged from the cylinder 3 and discharged uniformly, and the effects of air cooling and water cooling are combined without the need for an additional water pump. First, energy consumption is avoided, second, the heat dissipation effect is improved, and third, the heat is driven to a position far away from the battery pack for discharge to prevent the increase in ambient temperature from affecting the battery pack. Fourth, compared with the existing water cooling, the cooling method of water flow is faster. Finally, the device is provided with a water outlet pipe 11. After long-term use, the staff can open the water outlet pipe 11 by unscrewing the threaded plug 12 to replace the water inside the device.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation device for a battery pack of a wind turbine generator system, comprising a base (1), characterized in that: The base (1) is provided with a heat conducting mechanism (2), and the heat conducting mechanism (2) absorbs heat generated by electricity stored in the battery pack; A cylinder (3) is provided on one side of the top surface of the base (1), a heat dissipation mechanism (4) is provided inside the cylinder (3), the heat dissipation mechanism (4) comprises a motor (5), the motor (5) is fixedly arranged in the middle of the inner bottom surface of the cylinder (3), the base (1) and the lower part of the cylinder (3) are both provided with an air cavity (6), the air cavity (6) is connected to the inside of the cylinder (3), the output end of the motor (5) is coaxially fixedly connected with a base rod (7), and the outer wall of the base rod (7) is provided with an exhaust fan (8); An inner cylinder (9) is provided above the base rod (7), the inner cylinder (9) is coaxially fixedly connected to the inside of the cylinder (3), and a flow guiding mechanism (10) is provided inside the inner cylinder (9), the flow guiding mechanism (10) guiding the water flow to circulate; The heat conduction mechanism (2) comprises two square tubes (13) arranged above the base (1); the bottom surface of the square tube (13) located at the bottom is connected and fixed to the base (1); the square tubes (13) are arranged in a rectangular ring structure; both ends of the square tubes (13) are located on a side close to the cylinder (3) and are not connected to each other; the rear ends of the two square tubes (13) are connected via a vertical tube (14); the front ends of the two square tubes (13) are connected to a connecting tube (15); the connecting tube (15) located at the bottom is a Z-shaped structure; the ends of the two connecting tubes (15) successively penetrate the outer wall of the cylinder (3) and the outer wall of the inner cylinder (9) and extend to the interior of the inner cylinder (9).

2. A wind turbine battery heat dissipation device according to claim 1, characterized in that: A water outlet pipe (11) is penetrated through a wall of a side of the square tube (13) located at the lower side away from the cylinder (3); a threaded plug (12) is threadedly connected to an open end of the water outlet pipe (11) on a side away from the cylinder (3); a heat conduction pad (16) is fixedly provided on the inner wall of the square tube (13); the heat conduction pad (16) is a U-shaped structure; two first heat conduction plates (17) are provided between the two square tubes (13) in a front-to-back symmetrical structure; a plurality of second heat conduction plates (18) are evenly fixedly provided on the upper and lower outer walls of the first heat conduction plate (17) in a linear and evenly spaced structure; the second heat conduction plate (18) is a Z-shaped structure and its upper end penetrates through the outer wall of the adjacent square tube (13) and extends into the interior thereof; a plurality of heat dissipation plates (19) are fixedly provided on the outer wall of the first heat conduction plate (17) in a linear and evenly spaced structure; a plurality of heat dissipation grooves (20) are evenly provided on the heat dissipation plates (19).

3. A wind turbine battery heat dissipation device according to claim 2, characterized in that: The inner cylinder (9) is a T-shaped cylindrical structure. A cavity (21) and an inner cavity (22) are respectively provided in the middle of the top surface and the lower side of the inner surface of the inner cylinder (9). The interiors of the upper and lower connecting tubes (15) are respectively connected to the lower end of the cavity (21) and the upper end of the inner cavity (22). A partition (23) is provided on the side close to the cylinder (3) inside the two connecting tubes (15). A hinge shaft (24) is fixedly provided on the bottom surface of the upper partition (23) at one end away from the cylinder (3) and on the bottom surface of the lower partition (23) at one end close to the cylinder (3). The two hinge shafts (24) are respectively rotatably connected to the inner walls of the upper and lower square tubes (13). A plurality of torsion springs (25) are sleeved on the hinge shafts (24).

4. A wind turbine battery heat dissipation device according to claim 3, characterized in that: The flow guiding mechanism (10) comprises a piston plate (26) disposed at the lower part of the inner cavity (22), the piston plate (26) being slidably matched with the inner cavity (22), a sliding rod (27) being coaxially fixedly connected to the bottom surface of the piston plate (26), a rod groove (28) being slidably matched with the sliding rod (27) being provided on the bottom surface of the inner cavity (22), a plurality of limit blocks (29) being fixedly disposed at the lower end of the outer wall of the sliding rod (27) in an annular structure with equal spacing, and a limit groove being slidably matched with the limit block (29) being provided on the inner wall of the base rod (7). (30), a guide block (31) is fixedly arranged on the inner wall of the upper side of the rod groove (28), and the guide block (31) is a hemispherical structure. A bidirectional threaded groove (32) is provided on the outer wall of the slide rod (27) and is slidably matched with the guide block (31). A transfer tube (33) is coaxially penetrated and rotatably connected between the inner cavity (22) and the cavity (21). A plurality of guide rods (34) are evenly fixedly arranged on the middle part of the top surface of the piston plate (26), and a guide groove (35) is provided on the bottom surface of the transfer tube (33) and is slidably matched with the guide rod (34).

5. A wind turbine battery heat dissipation device according to claim 4, characterized in that: A spiral tube (36) is provided above the transfer tube (33). Two flared tubes (37) are symmetrically connected at the upper and lower ends of the spiral tube (36). The flared tube (37) located at the lower part is coaxially fixedly connected to the upper end of the transfer tube (33). A plurality of sleeves (38) are evenly fixedly provided on the inner wall of the upper open end of the transfer tube (33). An extension rod (40) is elastically connected to the inner bottom surface of the sleeve (38) via a tension spring (39). A circular plate (41) that slidably cooperates with the inside of the transfer tube (33) is fixedly provided between the upper ends of the plurality of extension rods (40). A swivel (43) is coaxially fixedly connected to the upper end of the flared tube (37) located at the upper side via two symmetrically fixed extrusion rods (42). The swivel (43) is rotatably connected to the inner wall of the cavity (21).

6. A wind turbine battery heat dissipation device according to claim 5, characterized in that: A round box (44) is fixedly provided at the upper end of the inner wall of the cavity (21), the round box (44) being an annular structure with a U-shaped cross section, a plurality of round grooves (45) being evenly provided on the bottom surface of the round box (44), a feed tray (46) being rotatably connected inside the round groove (45), a plurality of feed slots (47) being provided on the outer wall of the feed tray (46) being an annular structure with equal spacing, the feed slots (47) being a V-shaped structure, and a side wall of the extrusion rod (42) being in extrusion contact with an inner wall of one side of the feed slot (47).

7. A wind turbine battery heat dissipation device according to claim 6, characterized in that: An air inlet pipe (48) is provided between any two adjacent heat dissipation plates (19); the upper end of the air inlet pipe (48) is a closed structure; the lower end of the air inlet pipe (48) penetrates the top surface of the base (1) and extends into the interior of the wind cavity (6) and is in communication with the interior of the wind cavity (6); a plurality of air inlets (49) are evenly provided on the side wall of the air inlet pipe (48); a plurality of air inlets (50) are evenly provided on the top surface of the wind cavity (6); the upper portion of the cylinder (3) is a truncated cone-shaped structure with a larger upper portion and a smaller lower portion; the inner top surface of the cylinder (3) is a curved surface structure with a height gradually decreasing from the outside to the inside; and the diameter of the open end of the cylinder (3) is smaller than the inner diameter of the round box (44).

8. A heat dissipation method for a wind turbine battery group heat dissipation device according to claim 7, characterized in that: Here are the steps: S1, pouring cold water into the cavity (21) from the open end of the cylinder (3); S2, using the flow guiding mechanism (10) to cause the water in the cavity (21) to circulate inside the two square tubes (13) and the inner cylinder (9); S3, helping the water in the inner cylinder (9) and the plurality of heat dissipation plates (19) to dissipate heat via the heat dissipation mechanism (4); S4, when the heat dissipation mechanism (4) and the flow guiding mechanism (10) are in operation, then sodium sulfate is added to the water flow in the cavity (21). The flow guiding mechanism (10) can temporarily concentrate the water flow in the cavity (21), and then help the water flow to quickly dissipate heat through the heat absorption and dissolution characteristics of sodium sulfate.

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