Heat dissipation device for lithium battery pack

Abstract

The heat dissipation device comprises a bearing box body, a cover plate and a battery pack, the battery pack is installed in a bearing groove in the bottom of the bearing box body, a boss is arranged on the top of the bearing box body, and the cover plate is installed on the boss on the top of the bearing box body. A plurality of air inlet holes are evenly formed in one side wall of the bearing box body in the transverse direction and the longitudinal direction, a plurality of air outlet holes are evenly formed in the other side wall of the bearing box body in the transverse direction and the longitudinal direction, and a first heat dissipation mechanism is installed in the bearing box body and located on the side walls of the air inlet holes. And second heat dissipation mechanisms are mounted below the first heat dissipation mechanism and on the two sides of the lithium battery pack. According to the lithium battery pack heat dissipation device, heat dissipation is conducted synchronously in an air cooling mode and a water cooling mode, the heat dissipation mode is increased, heat generated when a lithium battery pack works can be rapidly dissipated, and the working efficiency of the heat dissipation device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery heat dissipation, and particularly relates to a heat dissipation device for a lithium battery pack. Background Art

[0002] Lithium battery is a battery that uses lithium metal or lithium alloy as positive / negative electrode material and non-aqueous electrolyte solution. Among them, lithium battery pack is generally lithium-ion battery pack, which is a large-capacity battery pack obtained by connecting single cells in series and parallel according to industrial requirements. Lithium battery pack will generate a lot of heat when working. Due to the relatively sealed use environment, if the heat cannot be dissipated in time, the battery pack will be damaged by high temperature during long-term use. In severe cases, it will cause battery explosion and equipment damage, and greatly shorten the service life of the battery. Therefore, it is necessary to set a heat dissipation mechanism in the battery module to dissipate the heat of the battery. Most of the existing heat dissipation devices use heat dissipation holes or fans to dissipate the heat of lithium battery packs. The heat dissipation form is relatively simple and the heat dissipation efficiency is low. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a heat dissipation device for a lithium battery pack, which simultaneously dissipates heat through air cooling and water cooling, increases the heat dissipation method, can quickly dissipate the heat generated by the lithium battery pack during operation, and improves the working efficiency of the heat dissipation device.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A heat dissipation device for a lithium battery pack comprises a carrying box, a cover plate, and a battery pack, wherein the battery pack is installed in a carrying groove at the bottom of the carrying box, a boss is provided on the top of the carrying box, the cover plate is installed on the boss on the top of the carrying box, a plurality of air inlet holes are uniformly opened on one side wall of the carrying box in the horizontal and vertical directions, a plurality of air outlet holes are uniformly opened on the other side wall of the carrying box in the horizontal and vertical directions, a first heat dissipation mechanism is installed inside the carrying box and on the side wall of the air inlet hole, and a second heat dissipation mechanism is installed below the first heat dissipation mechanism and on both sides of the lithium battery pack.

[0006] The first heat dissipation mechanism includes a shell, a fan, and a drive motor. The shell is installed on the inner wall of the carrying box. A rotating shaft is rotatably installed inside the shell, and one end of the rotating shaft extends to the outside of the shell. A plurality of first bevel gears are equidistantly installed on the rotating shaft inside the shell. A plurality of connecting shafts corresponding to the first bevel gears are installed on one side of the first bevel gear and on the side wall of the shell. The two ends of the connecting shaft are respectively located inside and outside the shell. A second bevel gear is installed at the end of the connecting shaft inside the shell, and the second bevel gear is meshed with the first bevel gear. There are multiple fans and they are respectively installed at one end of the connecting shaft away from the second bevel gear. The drive motor is installed on the shell and connected to one end of the rotating shaft.

[0007] The second heat dissipation mechanism includes a water supply mechanism, a water tank, and a cooling pipe. The water tank is located below the end of the rotating shaft away from the driving motor. The water tank is installed at the bottom of the supporting box body. A water supply pipe and a water outlet pipe are installed on the side of the water tank close to the side wall of the supporting box body. Above the water supply pipe and the water outlet pipe, the water supply pipe and the water outlet pipe both pass through the supporting box body and extend to the outside of the supporting box body. A valve is installed on the water outlet pipe located outside the supporting box body. The water supply mechanism is installed on the water tank. There are two cooling pipes respectively installed on both sides of the lithium battery pack. The two cooling pipes are connected by a connecting pipe. One end of the cooling pipe close to the water tank is connected to the water supply mechanism, and one end of the cooling pipe away from the water tank is connected to the water tank through a return pipe.

[0008] The water delivery mechanism includes a cam, a guide rod, a second spring, and a piston cylinder. The cam is installed at one end of the rotating shaft extending to the outside of the shell, the piston cylinder is installed inside the water tank, and the piston cylinder is slidably installed inside the piston. The guide rod is installed on the top of the piston, and the top of the guide rod passes through the piston cylinder and extends to the bottom of the cam. The guide rod is slidably connected to the piston cylinder and the water tank. A support frame is installed on the top of the guide rod, and a roller is rotatably installed on the support frame, and the roller abuts against the cam. A second spring is installed between the periphery of the guide rod, the bottom of the support frame and the top of the water tank, and an inlet pipe and a drain pipe are installed in the circumferential direction of the bottom of the piston cylinder. Check valves are installed inside the water inlet pipe and the drain pipe, and the end of the drain pipe away from the piston cylinder passes through the water tank and is connected to the cooling pipe.

[0009] Preferably, the cooling pipe is serpentine-shaped and is provided with a plurality of fins from top to bottom.

[0010] Preferably, locking mechanisms are installed at the four ends above the carrying box body, and the locking mechanisms include a T-rod, a first spring, and a support plate. The T-rod is slidably installed on the carrying box body, and the support plate is installed on the T-rod. The first spring is located on the periphery of the T-rod and fixedly installed between the support plate and the carrying box body. A circular hole corresponding to the T-rod is opened at the end of the cover plate, and the end of the T-rod is inserted into the circular hole of the cover plate.

[0011] Preferably, a groove is provided in the middle of the top of the cover plate, and a handle is rotatably installed inside the groove.

[0012] Preferably, through grooves are provided on both sides of the groove of the cover plate, and a protective net is installed in the through grooves.

[0013] The beneficial effects of the utility model are:

[0014] 1) Heat is dissipated simultaneously through air cooling and water cooling, which increases the heat dissipation method and can quickly dissipate the heat generated by the lithium battery pack during operation, thereby improving the working efficiency of the heat dissipation device.

[0015] 2) The cooling pipe is serpentine and has multiple fins installed from top to bottom, which increases the area of ​​cooling water in contact with the outside, which is beneficial to improving the working efficiency of the heat dissipation device.

[0016] 3) Locking mechanisms are installed at the four ends above the bearing box, which can quickly fix the cover plate and facilitate the installation and removal of the cover plate.

[0017] 4) A groove is provided in the middle of the top of the cover plate, and a handle is rotatably installed inside the groove. When the handle is not in use, it can be rotated and placed in the groove, thereby reducing the utilization of space.

[0018] 5) Through slots are provided on both sides of the groove of the cover plate, and a protective net is installed in the through slots. The top of the lithium battery pack can dissipate heat through the through slots, further improving the efficiency of heat dissipation of the lithium battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 The utility model is a schematic diagram of the structure of a heat dissipation device for a lithium battery pack.

[0020] Attached Figure 2 The utility model is a schematic diagram of the internal structure of a bearing box in a heat dissipation device for a lithium battery pack.

[0021] Attached Figure 3 The utility model is a top view of the interior of a bearing box in a heat dissipation device for a lithium battery pack.

[0022] Attached Figure 4 The utility model is a structural schematic diagram of a first heat dissipation mechanism in a heat dissipation device for a lithium battery pack.

[0023] Attached Figure 5 The utility model is a schematic diagram of the internal structure of a water tank in a heat dissipation device for a lithium battery pack.

[0024] Attached Figure 6 The utility model is a schematic diagram of the internal structure of a piston cylinder in a heat dissipation device for a lithium battery pack.

[0025] In the figure: 1, bearing box; 2, cover plate; 3, groove; 4, handle; 5, through groove; 6, protective net; 7, locking mechanism; 701, T-bar; 702, first spring; 703, support plate; 8, water supply pipe; 9, water outlet pipe; 10, valve; 11, air inlet; 12, air outlet; 13, bearing groove; 14, first heat dissipation mechanism; 1401, housing; 1402, rotating shaft; 1403, first bevel gear; 1404, second bevel gear; 1405, 05. Fan; 1406. Drive motor; 15. Water delivery mechanism; 1501. Cam; 1502. Roller; 1503. Support frame; 1504. Guide rod; 1505. Second spring; 1506. Piston cylinder; 1507. Water inlet pipe; 1508. Drain pipe; 1509. Piston; 1510. One-way valve; 16. Fin; 17. Water tank; 18. Boss; 19. Connecting pipe; 20. Return pipe; 21. Lithium battery pack; 22. Cooling pipe. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] A heat dissipation device for a lithium battery pack 21 comprises a carrying box 1, a cover plate 2, and a battery pack, wherein the battery pack is installed in a carrying groove 13 at the bottom of the carrying box 1, a boss 18 is provided on the top of the carrying box 1, and the cover plate 2 is installed on the boss 18 on the top of the carrying box 1. A plurality of air inlet holes 11 are uniformly opened on one side wall of the carrying box 1 in the horizontal and vertical directions, and a plurality of air outlet holes 12 are uniformly opened on the other side wall of the carrying box 1 in the horizontal and vertical directions. A first heat dissipation mechanism 14 is installed inside the carrying box 1 and on the side wall of the air inlet hole 11, and a second heat dissipation mechanism is installed below the first heat dissipation mechanism 14 and on both sides of the lithium battery pack 21.

[0029] The first heat dissipation mechanism 14 includes a shell 1401, a fan 1405, and a driving motor 1406. The shell 1401 is installed on the inner wall of the carrying box 1. A rotating shaft 1402 is rotatably installed inside the shell 1401. One end of the rotating shaft 1402 extends to the outside of the shell 1401. The rotating shaft 1402 inside the shell 1401 is equidistantly installed with multiple first bevel gears 1403. One side of the first bevel gear 1403 and the side wall of the shell 1401 are equipped with multiple connecting shafts corresponding to the first bevel gears 1403. The two ends of the connecting shaft are respectively located inside and outside the shell 1401. A second bevel gear 1404 is installed at the end of the connecting shaft inside the shell 1401. The second bevel gear 1404 is meshed and connected with the first bevel gear 1403. There are multiple fans 1405, which are respectively installed at one end of the connecting shaft away from the second bevel gear 1404. The driving motor 1406 is installed on the shell 1401 and connected to one end of the rotating shaft 1402. The driving motor 1406 drives the rotating shaft 1402 to rotate, and multiple first bevel gears 1403 on the rotating shaft 1402 rotate accordingly. The second bevel gear 1404 meshing with the first bevel gear 1403 drives the connecting shaft to rotate, thereby causing the fan 1405 to rotate, and the air outside the carrying box 1 is sucked in through the air inlet 11 and blown toward the lithium battery pack 21, so as to cool the lithium battery pack 21. After the air contacts the lithium battery pack 21, the temperature rises and is discharged through the air outlet 12 under the action of the fan 1405, so as to achieve heat dissipation of the lithium battery pack 21.

[0030] The second heat dissipation mechanism includes a water delivery mechanism 15, a water tank 17, and a cooling pipe 22. The water tank 17 is located below the end of the rotating shaft 1402 away from the driving motor 1406. The water tank 17 is installed at the bottom of the carrying box body 1. A water supply pipe 8 and a water outlet pipe 9 are installed on the side of the water tank 17 close to the side wall of the carrying box body 1. Above the water supply pipe 8 and the water outlet pipe 9, the water supply pipe 8 and the water outlet pipe 9 both pass through the carrying box body 1 and extend to the outside of the carrying box body 1. A valve 10 is installed on the water outlet pipe 9 located outside the carrying box body 1. The water delivery mechanism 15 is installed on the water tank 17. The number of cooling pipes 22 is two and they are installed on both sides of the lithium battery pack 21 respectively. The two cooling pipes 22 are connected by a connecting pipe 19, one end of the cooling pipe 22 close to the water tank 17 is connected to the water supply mechanism 15, and the end of the cooling pipe 22 away from the water tank 17 is connected to the water tank 17 through the return pipe 20. The cooling water inside the water tank 17 is transported to the cooling pipe 22 through the water supply mechanism 15. When the cooling water flows through the cooling pipe 22, the cooling water realizes heat exchange through the cooling pipe 22. The heat generated by the lithium battery pack 21 contacts the cooling pipe 22, which increases the temperature of the cooling water. After the temperature of the cooling water increases, it enters the water tank 17, is neutralized by the cooling inside the water tank 17, and then enters the cooling pipe 22 again to achieve heat dissipation of the lithium battery pack 21.

[0031] The water delivery mechanism 15 includes a cam 1501, a guide rod 1504, a second spring 1505, and a piston cylinder 1506. The cam 1501 is mounted on one end of the rotating shaft 1402 extending to the outside of the housing 1401. The piston cylinder 1506 is mounted inside the water tank 17. The inside of the piston cylinder 1506 is slidably mounted on the piston 1509. The guide rod 1504 is mounted on the top of the piston 1509. The top of the guide rod 1504 passes through the piston cylinder 1506 and extends to the cam Below 1501, a guide rod 1504 is slidably connected with a piston cylinder 1506 and a water tank 17. A support frame 1503 is installed at the top of the guide rod 1504. A roller 1502 is rotatably installed on the support frame 1503. The roller 1502 abuts against the cam 1501. A second spring 1505 is installed between the periphery of the guide rod 1504, the bottom of the support frame 1503 and the top of the water tank 17. A water inlet pipe 1507 and a drain pipe 1508 are installed in the circumferential direction of the bottom of the piston cylinder 1506. The water pipe 1508, the water inlet pipe 1507 and the drain pipe 1508 are both installed with a one-way valve 1510, the end of the drain pipe 1508 away from the piston cylinder 1506 passes through the water tank 17 and is connected to the cooling pipe 22, when the rotating shaft 1402 rotates, the cam 1501 is driven to rotate, and when the cam 1501 rotates, it will squeeze the guide rod 1504 up and down, and the guide rod 1504 drives the piston 1509 to move up and down in the piston cylinder 1506 under the action of the second spring 1505. The pressure generated when the piston 1509 moves upward draws the water in the water tank 17 into the piston cylinder 1506 through the water inlet pipe 1507. At this time, the water in the drain pipe 1508 will not flow back due to the action of the one-way valve 1510. When the piston 1509 moves downward, the pressure generated transports the water in the piston cylinder 1506 to the drain pipe 1508. At this time, the water in the water inlet pipe 1507 will not flow out through the water inlet pipe 1507 due to the action of the one-way valve 1510, thereby realizing the flow of cooling water.

[0032] The cooling pipe 22 is serpentine and is provided with a plurality of fins 16 from top to bottom, which increases the area of ​​the cooling water in contact with the outside, and is beneficial to improving the working efficiency of the heat dissipation device.

[0033] Locking mechanisms 7 are installed at the four ends above the carrying box 1, and the locking mechanism 7 includes a T-bar 701, a first spring 702, and a support plate 703. The T-bar 701 is slidably installed on the carrying box 1, and the support plate 703 is installed on the T-bar 701. The first spring 702 is located at the periphery of the T-bar 701 and is fixedly installed between the support plate 703 and the carrying box 1. A circular hole corresponding to the T-bar 701 is opened at the end of the cover plate 2, and the end of the T-bar 701 is inserted into the circular hole of the cover plate 2. The cover plate 2 can be quickly fixed by the locking mechanism 7, and the installation and disassembly of the cover plate 2 is also convenient.

[0034] A groove 3 is provided in the middle of the top of the cover plate 2, and a handle 4 is rotatably installed inside the groove 3. When the handle 4 is not in use, it can be rotatably placed in the groove 3, thereby reducing the use of space. Through grooves 5 are provided on both sides of the groove 3 of the cover plate 2, and a protective net 6 is installed in the through grooves 5. The top of the lithium battery pack 21 can dissipate heat through the through grooves 5, thereby further improving the heat dissipation efficiency of the lithium battery pack 21.

[0035] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A heat dissipation device for a lithium battery pack, comprising a carrying box, a cover plate, and a battery pack, wherein the battery pack is installed in a carrying groove at the bottom of the carrying box, a boss is provided on the top of the carrying box, the cover plate is installed on the boss on the top of the carrying box, a plurality of air inlet holes are uniformly opened on one side wall of the carrying box in the horizontal and vertical directions, and a plurality of air outlet holes are uniformly opened on the other side wall of the carrying box in the horizontal and vertical directions, characterized in that: A first heat dissipation mechanism is installed inside the carrying box and on the side wall of the air inlet hole, and a second heat dissipation mechanism is installed below the first heat dissipation mechanism and on both sides of the lithium battery pack.

2. A heat dissipation device for a lithium battery pack according to claim 1, characterized in that: The first heat dissipation mechanism includes a shell, a fan, and a drive motor. The shell is installed on the inner wall of the carrying box. A rotating shaft is rotatably installed inside the shell, and one end of the rotating shaft extends to the outside of the shell. A plurality of first bevel gears are equidistantly installed on the rotating shaft inside the shell. A plurality of connecting shafts corresponding to the first bevel gears are installed on one side of the first bevel gear and on the side wall of the shell. The two ends of the connecting shaft are respectively located inside and outside the shell. A second bevel gear is installed at the end of the connecting shaft inside the shell, and the second bevel gear is meshed with the first bevel gear. There are multiple fans and they are respectively installed at one end of the connecting shaft away from the second bevel gear. The drive motor is installed on the shell and connected to one end of the rotating shaft.

3. A heat dissipation device for a lithium battery pack according to claim 1, characterized in that: The second heat dissipation mechanism includes a water supply mechanism, a water tank, and a cooling pipe. The water tank is located below the end of the rotating shaft away from the driving motor. The water tank is installed at the bottom of the supporting box body. A water supply pipe and a water outlet pipe are installed on the side of the water tank close to the side wall of the supporting box body. Above the water supply pipe and the water outlet pipe, the water supply pipe and the water outlet pipe both pass through the supporting box body and extend to the outside of the supporting box body. A valve is installed on the water outlet pipe located outside the supporting box body. The water supply mechanism is installed on the water tank. There are two cooling pipes respectively installed on both sides of the lithium battery pack. The two cooling pipes are connected by a connecting pipe. One end of the cooling pipe close to the water tank is connected to the water supply mechanism, and one end of the cooling pipe away from the water tank is connected to the water tank through a return pipe.

4. A heat dissipation device for a lithium battery pack according to claim 3, characterized in that: The water delivery mechanism includes a cam, a guide rod, a second spring, and a piston cylinder. The cam is installed at one end of the rotating shaft extending to the outside of the shell, the piston cylinder is installed inside the water tank, and the piston cylinder is slidably installed inside the piston. The guide rod is installed on the top of the piston, and the top of the guide rod passes through the piston cylinder and extends to the bottom of the cam. The guide rod is slidably connected to the piston cylinder and the water tank. A support frame is installed on the top of the guide rod, and a roller is rotatably installed on the support frame, and the roller abuts against the cam. A second spring is installed between the periphery of the guide rod, the bottom of the support frame and the top of the water tank, and an inlet pipe and a drain pipe are installed in the circumferential direction of the bottom of the piston cylinder. Check valves are installed inside the water inlet pipe and the drain pipe, and the end of the drain pipe away from the piston cylinder passes through the water tank and is connected to the cooling pipe.

5. The heat dissipation device for a lithium battery pack according to claim 3, characterized in that: The cooling pipe is snake-shaped and is provided with a plurality of fins from top to bottom.

6. A heat dissipation device for a lithium battery pack according to claim 1, characterized in that: Locking mechanisms are installed at the four ends above the carrying box, and the locking mechanisms include a T-rod, a first spring, and a support plate. The T-rod is slidably installed on the carrying box, and the support plate is installed on the T-rod. The first spring is located on the periphery of the T-rod and fixedly installed between the support plate and the carrying box. A circular hole corresponding to the T-rod is opened at the end of the cover plate, and the end of the T-rod is inserted into the circular hole of the cover plate.

7. The heat dissipation device for a lithium battery pack according to claim 1, characterized in that: A groove is provided in the middle of the top of the cover plate, and a handle is rotatably installed inside the groove.

8. A heat dissipation device for a lithium battery pack according to claim 7, characterized in that: Through slots are provided on both sides of the groove of the cover plate, and a protective net is installed in the through slots.

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