A temperature equalization mechanism for lithium battery pack

Abstract

The present invention discloses a temperature balancing mechanism for a lithium battery pack, comprising a mounting frame, mounting slots evenly distributed on the mounting frame, the inner walls of each mounting slot being fixedly connected to a heat-conducting tube, a battery cell being mounted in the heat-conducting tube, the bottom of the heat-conducting tube being higher than the lowest point of the mounting frame, a mounting seat being fixedly connected to the bottom of the mounting frame, and a groove being formed on the top of the mounting seat. While ensuring adequate heat dissipation for the battery pack, the present invention can monitor each battery cell and control the heat dissipation effect based on the temperature of the battery cell, thereby achieving the effect of controlling the temperature of each battery cell. In this way, the temperature of all battery cells can be adjusted to a normal value, achieving a temperature balancing effect for the battery pack, and effectively improving the performance, service life, and safety of the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery temperature management, and more particularly to a temperature equalization mechanism for a lithium battery pack. Background Art

[0002] A lithium-ion battery pack temperature equalization system is a system used to manage and balance the temperature of each battery cell within a lithium-ion battery pack. Factors such as manufacturing variations, usage conditions, and charge / discharge cycles can lead to inconsistent temperatures across the battery cells. This temperature variation can affect the performance, lifespan, and safety of the battery pack.

[0003] Lithium battery packs are usually composed of multiple battery cells. When charging and discharging, the lithium battery pack generates heat. Usually, the lithium battery pack is equipped with a heat dissipation device to dissipate heat from the lithium battery pack during the charging and discharging state. When using common heat dissipation methods, the heat dissipation effect of each battery cell cannot be adjusted and controlled individually, which will still cause the temperature of the battery cells to remain constant, affecting the performance, life and safety of the battery pack. Therefore, a lithium battery pack temperature balancing mechanism is needed. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a temperature equalization mechanism for a lithium battery pack to solve the background technology problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A temperature balancing mechanism for a lithium battery pack includes a mounting frame, mounting grooves evenly distributed on the mounting frame, the inner walls of the mounting grooves are fixedly connected to heat-conducting tubes, battery cells are installed in the heat-conducting tubes, the bottom of the heat-conducting tubes is higher than the lowest point of the mounting frame, the bottom of the mounting frame is fixedly connected to a mounting seat, the top of the mounting seat is provided with a groove, the mounting seat is provided with a cavity, the left and right sides of the mounting frame are fixedly connected to mounting boxes, the top of the left mounting box is provided with an air inlet groove, and the inner wall of the left mounting box is provided with a semiconductor refrigeration The heat dissipation end of the semiconductor refrigeration sheet passes through and extends to the left side of the installation box. The bottom of the installation box on the left is connected with an air inlet pipe, the bottom end of the air inlet pipe is connected with the cavity, the inner wall of the cavity is provided with air inlet holes corresponding to the battery cells one by one, the inner wall of the groove is connected with an air outlet pipe, the right end of the air outlet pipe is connected with the right installation box, the installation box on the right is installed with a fan, the inner wall of the heat-conducting cylinder is embedded with a temperature sensor, the inner wall cross-section of the air inlet hole is trumpet-shaped, and an adjustment mechanism is provided inside the air inlet hole;

[0007] The adjustment mechanism includes an electric push rod, the bottom end of which is inserted into the inner wall of the cavity, and the electric push rod is located below the air inlet. The top end of the electric push rod is fixedly connected to a plug, and the plug is located inside the air inlet. The shape of the plug is adapted to the air inlet.

[0008] As a further description of the above technical solution:

[0009] The outer side of the semiconductor refrigeration plate is slidably connected to the inner wall of the left installation box. A sealing ring fixedly connected to the left installation box is embedded on the left installation box, and the inner side of the sealing ring is in contact with the semiconductor refrigeration plate.

[0010] As a further description of the above technical solution:

[0011] The right side of the semiconductor refrigeration plate is fixedly connected to a heat conducting plate arranged at equal distances, and the right side of the heat conducting plate is in contact with the inner wall of the installation box.

[0012] As a further description of the above technical solution:

[0013] A baffle is inserted into the left side of the installation box on the left side and is slidably connected to the installation box, and the baffle is located above the semiconductor refrigeration plate.

[0014] As a further description of the above technical solution:

[0015] A filter plate is fixedly connected to the inner wall of the air inlet groove.

[0016] As a further description of the above technical solution:

[0017] A circular groove is provided on the baffle, and a fan is installed inside the circular groove.

[0018] As a further description of the above technical solution:

[0019] The inner wall of the circular groove is rotatably connected to a rotating cylinder, and the fan is installed in the rotating cylinder. The front of the rotating cylinder is fixedly connected to an adjusting rod, and one front end of the adjusting rod passes through and extends to the front of the baffle. A locking rod threadedly connected to the adjusting rod is inserted through the front of the adjusting rod, and one back end of the locking rod is in contact with the baffle.

[0020] As a further description of the above technical solution:

[0021] A controller is installed on the front of the mounting frame. The output end of the controller is connected to the electric push rod signal, and the input end of the controller is connected to the temperature sensor signal.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] Under the premise of ensuring sufficient heat dissipation of the battery pack, this solution can monitor each battery cell and control the heat dissipation effect according to the temperature of the battery cell, thereby achieving the effect of controlling the temperature of each battery cell. In this way, the temperature of all battery cells can be adjusted to normal values, achieving the effect of temperature balance of the battery pack, and effectively improving the performance, life and safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the three-dimensional diagrams of the present invention;

[0025] Figure 2 This is the second stereogram of the present invention;

[0026] Figure 3 This is the third stereogram of the present invention;

[0027] Figure 4 is a cross-sectional view of the present invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged view of part A in the middle;

[0029] Figure 6 For the present invention Figure 4 Enlarged view of part B in the middle.

[0030] Description of the numbers in the figure:

[0031] 1. Mounting frame; 2. Mounting slot; 3. Heat transfer tube; 4. Battery cell; 5. Mounting base; 6. Groove; 7. Cavity; 8. Mounting box; 9. Air inlet slot; 10. Semiconductor cooling plate; 11. Air inlet pipe; 12. Air inlet hole; 13. Air outlet pipe; 14. Fan; 15. Temperature sensor; 16. Adjustment mechanism; 161. Electric push rod; 162. Plug; 17. Sealing ring; 18. Filter plate; 19. Heat transfer plate; 20. Baffle; 21. Circular groove; 22. Fan; 23. Rotating cylinder; 24. Adjustment lever; 25. Locking lever; 26. Controller. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] See also Figures 1 to 6In the present invention, a temperature balancing mechanism for a lithium battery pack is provided, comprising a mounting frame 1, mounting grooves 2 evenly distributed on the mounting frame 1, the inner walls of the mounting grooves 2 are fixedly connected with heat-conducting tubes 3, battery cells 4 are installed in the heat-conducting tubes 3, the bottom of the heat-conducting tubes 3 is higher than the lowest point of the mounting frame 1, a mounting seat 5 is fixedly connected to the bottom of the mounting frame 1, a groove 6 is provided on the top of the mounting seat 5, a cavity 7 is provided on the mounting seat 5, mounting boxes 8 are fixedly connected to the left and right sides of the mounting frame 1, an air inlet groove 9 is provided on the top of the left mounting box 8, and a semiconductor cooling sheet 1 is fixedly connected to the inner wall of the left mounting box 8 0, the heat dissipation end of the semiconductor refrigeration plate 10 passes through and extends to the left side of the mounting box 8. The bottom of the left mounting box 8 is connected with an air inlet pipe 11, and the bottom end of the air inlet pipe 11 is connected to the cavity 7. The inner wall of the cavity 7 is provided with air inlet holes 12 corresponding to the battery cells 4. The inner wall of the groove 6 is connected with an air outlet pipe 13, and the right end of the air outlet pipe 13 is connected to the right mounting box 8. The right mounting box 8 is installed with a fan 14, and the inner wall of the heat-conducting tube 3 is embedded with a temperature sensor 15. The cross-section of the inner wall of the air inlet hole 12 is trumpet-shaped, and an adjustment mechanism 16 is provided inside the air inlet hole 12.

[0034] The adjusting mechanism 16 includes an electric push rod 161, the bottom end of the electric push rod 161 is inserted into the inner wall of the cavity 7, the electric push rod 161 is located below the air inlet 12, and the top end of the electric push rod 161 is fixedly connected to a plug 162, which is located inside the air inlet 12, and the shape of the plug 162 is adapted to the air inlet 12.

[0035] In the present invention, the lithium battery pack is composed of a plurality of battery cells 4. When the battery pack is charged and discharged, the user turns on the fan 14, and the fan 14 will evacuate the inside of the installation box 8 on the right side. At this time, negative pressure will be generated in the installation box 8 on the right side, and the air outside the battery pack will enter the installation box 8 on the left side from the air inlet groove 9. Then the semiconductor refrigeration plate 10 is turned on, and the semiconductor refrigeration plate 10 will cool the air entering the inside of the installation box 8 on the left side. The cooled air will enter the cavity 7 from the air inlet pipe 11, and the air will then be discharged from the air inlet hole 12 and the plug 162. The air enters the groove 6 through the gap between the air intake holes 12. In the process of being discharged into the groove 6 from the air inlet holes 12, the air will contact the heat-conducting tube 3, thereby exchanging heat with the heat-conducting tube 3. The heat-conducting tube 3 is in contact with the battery cell 4, thereby transferring the temperature of the battery cell 4, thereby achieving the effect of cooling the battery cell 4. After cooling the battery cell 4, the air will be discharged from the air outlet pipe 13 on the groove 6 into the inside of the right installation box 8 and be discharged by the fan 14. As the air continues to contact the heat-conducting tube 3, the battery cell 4 can be continuously dissipated, thereby achieving the effect of cooling the battery pack.

[0036] When in use, the temperature sensor 15 will detect the temperature of each battery cell 4. If the temperature of a battery cell 4 exceeds the temperature of other battery cells 4, the electric push rod 161 under the battery cell 4 will be turned on. After the electric push rod 161 is turned on, it will drive the plug 162 to fall. Since the shape of the air inlet 12 is set in a trumpet shape and the plug 162 is adapted to it, after the plug 162 falls, the gap between the plug 162 and the air inlet 12 will increase. At this time, the air flow from the air inlet 12 to the bottom of the heat-conducting tube 3 will increase, thereby improving the effect of air exchange with the heat-conducting tube 3, thereby increasing the heat dissipation of the battery cell. The purpose of the heat dissipation effect of the battery cell 4 is to control the cooling effect of the overheated battery cell 4. When the temperature of the battery cell 4 is too low, the electric push rod 161 under the battery cell 4 is opened in the reverse direction. At this time, the plug 162 will rise, narrowing the gap between the air inlet 12 and the plug 162, thereby reducing the cooling effect of the air on the battery cell 4. By adjusting the height of the corresponding plug 162 under each battery cell 4, the heat dissipation effect of each battery cell 4 can be controlled, thereby achieving the effect of controlling the temperature of the battery cell 4, and then keeping the temperature of each battery cell 4 balanced, effectively improving the performance, life and safety of the battery pack.

[0037] The bottom of the heat-conducting tube 3 is higher than the lowest point of the mounting frame 1, which can effectively avoid the effect of the air dissipating heat from the heat-conducting tube 3 having secondary contact with the other heat-conducting tubes 3, thereby reducing the impact of the air after heat exchange on the heat dissipation of the other heat-conducting tubes 3 and improving the practicality of the device.

[0038] The air inlet 12 is trumpet-shaped, which can guide the cooled air and allow the cooled air to be accurately blown to the bottom of the heat transfer tube 3 , thereby improving the cooling effect of each battery cell 4 .

[0039] See also Figure 6 , wherein: the outer side of the semiconductor refrigeration plate 10 is slidably connected to the inner wall of the left installation box 8, and a sealing ring 17 fixedly connected to the left installation box 8 is embedded in the left installation box 8, and the inner side of the sealing ring 17 is in contact with the semiconductor refrigeration plate 10.

[0040] In the present invention, the semiconductor refrigeration chip 10 and the installation box 8 can be sealed by the provision of the sealing ring 17. In cold weather, the user can pull out the semiconductor refrigeration chip 10 and insert the heat dissipation end of the semiconductor refrigeration chip 10 toward the inside of the installation box 8. At this time, the heat dissipation end of the semiconductor refrigeration chip 10 will emit heat, and the heat will heat the air inside the installation box 8. The heated air can preheat the battery cell 4, thereby reducing the impact of cold weather on the battery pack and improving the practicality of the device.

[0041] See also Figure 4, wherein: the right side of the semiconductor refrigeration plate 10 is fixedly connected with a heat conducting plate 19 arranged at equal distances, and the right side of the heat conducting plate 19 is in contact with the inner wall of the installation box 8.

[0042] In the present invention, the provision of the heat conducting plate 19 can enhance the effect of cooling the air, thereby enhancing the effect of dissipating heat from the battery pack.

[0043] See also Figure 4 , wherein: a baffle 20 is inserted into the left side of the left mounting box 8 and is slidably connected thereto, and the baffle 20 is located above the semiconductor refrigeration sheet 10.

[0044] In the present invention, the provision of the baffle 20 can reduce the occurrence of heat emitted from the heat dissipation end of the semiconductor refrigeration plate 10 re-entering the interior of the installation box 8, thereby improving the practicality of the device.

[0045] See also Figure 1 , wherein: a filter plate 18 is fixedly connected to the inner wall of the air inlet groove 9.

[0046] In the present invention, the provision of the filter plate 18 can prevent dust from entering the interior of the device and causing internal pollution of the device, thereby improving the practicality of the device.

[0047] See also Figure 3 、 4 6, wherein: a circular groove 21 is opened on the baffle 20, and a fan 22 is installed inside the circular groove 21.

[0048] In the present invention, the user can blow air to the semiconductor refrigeration plate 10 by turning on the fan 22, thereby accelerating the heat dissipation effect of the heat dissipation end of the semiconductor refrigeration plate 10, and thereby improving the effect of cooling the air inside the installation box 8, thereby improving the heat dissipation ability of the battery pack, and the user inserts the baffle 20 into the installation box 8 and turns on the fan 22, which can pressurize the air entering the cavity 7, increase the flow rate of air entering the cavity 7, and thereby improve the heat dissipation effect of the device.

[0049] See also Figure 3 、 4 6, wherein: the inner wall of the circular groove 21 is rotatably connected to the rotating cylinder 23, the fan 22 is installed in the rotating cylinder 23, the front of the rotating cylinder 23 is fixedly connected to the adjusting rod 24, one end of the front of the adjusting rod 24 passes through and extends to the front of the baffle 20, the front of the adjusting rod 24 is interspersed with a locking rod 25 threadedly connected thereto, and one end of the back of the locking rod 25 is in contact with the baffle 20.

[0050] In the present invention, the rotating cylinder 23 can be locked by the locking rod 25. The user can release the lock on the rotating cylinder 23 by rotating the locking rod 25. Then the user can drive the rotating cylinder 23 to rotate by rotating the adjusting rod 24. After the rotating cylinder 23 rotates one hundred and eighty degrees, the fan 22 will deliver air upward. The fan 22 is inside the installation box 8, and the air will pass through the filter plate 18 in the opposite direction, thereby achieving the effect of backflushing and cleaning the filter plate 18, thereby improving the practicality of the device.

[0051] See also Figure 1 , wherein: a controller 26 is installed on the front of the mounting frame 1 , the output end of the controller 26 is connected to the electric push rod 161 for signal connection, and the input end of the controller 26 is connected to the temperature sensor 15 for signal connection.

[0052] In the present invention, the configuration of the controller 26 can facilitate the user to control the electric push rod 161, thereby improving the practicality of the device.

[0053] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A lithium battery pack temperature equalization mechanism, comprising a mounting frame (1), characterized in that: The mounting frame (1) has mounting grooves (2) evenly distributed thereon, the inner walls of the mounting grooves (2) are fixedly connected with heat-conducting tubes (3), a battery cell (4) is installed in the heat-conducting tubes (3), the bottom of the heat-conducting tubes (3) is higher than the lowest point of the mounting frame (1), the bottom of the mounting frame (1) is fixedly connected with a mounting seat (5), the top of the mounting seat (5) is provided with a groove (6), the mounting seat (5) is provided with a cavity (7), the left and right sides of the mounting frame (1) are fixedly connected with mounting boxes (8), the top of the left mounting box (8) is provided with an air inlet groove (9), the inner wall of the left mounting box (8) is installed with a semiconductor cooling plate (10), the semiconductor cooling plate (10) The heat dissipation end passes through and extends to the left side of the installation box (8), the bottom of the installation box (8) on the left side is connected to an air inlet pipe (11), the bottom end of the air inlet pipe (11) is connected to the cavity (7), the inner wall of the cavity (7) is provided with air inlet holes (12) corresponding to the battery cells (4), the inner wall of the groove (6) is connected to an air outlet pipe (13), the right end of the air outlet pipe (13) is connected to the right installation box (8), the right installation box (8) is installed with a fan (14), the inner wall of the heat-conducting tube (3) is embedded with a temperature sensor (15), the inner wall cross-section of the air inlet hole (12) is trumpet-shaped, and an adjustment mechanism (16) is provided inside the air inlet hole (12); The regulating mechanism (16) comprises an electric push rod (161), the bottom end of the electric push rod (161) is inserted into the inner wall of the cavity (7), the electric push rod (161) is located below the air inlet (12), the top end of the electric push rod (161) is fixedly connected to a plug (162), the plug (162) is located inside the air inlet (12), and the shape of the plug (162) is adapted to the air inlet (12).

2. A lithium battery pack temperature equalization mechanism according to claim 1, characterized in that: The outer side of the semiconductor refrigeration plate (10) is slidably connected to the inner wall of the left installation box (8); a sealing ring (17) fixedly connected to the left installation box (8) is embedded in the left installation box (8); the inner side of the sealing ring (17) is in contact with the semiconductor refrigeration plate (10).

3. The temperature equalization mechanism for a lithium battery pack according to claim 1, characterized in that: The right side of the semiconductor refrigeration plate (10) is fixedly connected to a heat conducting plate (19) arranged at equal distances, and the right side of the heat conducting plate (19) is in contact with the inner wall of the installation box (8).

4. The temperature equalization mechanism for a lithium battery pack according to claim 1, characterized in that: A baffle (20) is inserted into the left side of the installation box (8) on the left side and is slidably connected thereto. The baffle (20) is located above the semiconductor refrigeration plate (10).

5. The temperature equalization mechanism for a lithium battery pack according to claim 1, characterized in that: A filter plate (18) is fixedly connected to the inner wall of the air inlet groove (9).

6. The temperature equalization mechanism for a lithium battery pack according to claim 4, characterized in that: A circular groove (21) is provided on the baffle (20), and a fan (22) is installed inside the circular groove (21).

7. The temperature equalization mechanism for a lithium battery pack according to claim 6, characterized in that: The inner wall of the circular groove (21) is rotatably connected to a rotating cylinder (23), and the fan (22) is installed in the rotating cylinder (23). The front of the rotating cylinder (23) is fixedly connected to an adjusting rod (24), and one end of the front of the adjusting rod (24) passes through and extends to the front of the baffle (20). The front of the adjusting rod (24) is interspersed with a locking rod (25) threadedly connected thereto, and one end of the back of the locking rod (25) contacts the baffle (20).

8. The temperature equalization mechanism for a lithium battery pack according to claim 1, characterized in that: A controller (26) is installed on the front of the mounting frame (1), the output end of the controller (26) is connected to the electric push rod (161) for signal transmission, and the input end of the controller (26) is connected to the temperature sensor (15) for signal transmission.

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