A heat dissipation type lithium battery pack
Through the rotation of the thermal conduction plate and the gas flow combination, combined with low-temperature water circulation and electromagnet accelerated air flow, the problem of poor heat dissipation effect of lithium battery packs is solved and a more efficient heat dissipation effect is achieved.
Patent Information
- Application Number
- CN202411448378.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-10-17
AI Technical Summary
The existing lithium battery packs have poor heat dissipation effect, especially in high-intensity operating state, the airflow rate is too low and cannot be dissipated in time, resulting in overheating of the lithium battery.
Through the rotation and gas flow of multiple thermal conductor plates, the gas flow on the surface of the thermal conductor plate is accelerated, and the cooling is reduced by low-temperature water circulation to improve the heat dissipation effect; during high load operation, the gas flow rate is accelerated by using electromagnets and magnetic plates to ensure the thermal conductor plate. heat dissipates.
It significantly improves the heat dissipation effect of the lithium battery pack, ensures that the lithium battery can dissipate heat normally during high load operation, and avoids overheating problems.
Smart Images
Figure CN119029397B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lithium battery packs, and in particular to a heat dissipation type lithium battery pack. Background Art
[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. During the use of lithium batteries, requirements are placed on the waterproof and heat dissipation performance of lithium batteries.
[0003] When using existing lithium battery packs, in order to avoid damage to the lithium battery, the lithium battery is usually placed in a battery box, and then a heat conductive plate is used to dissipate the heat generated by the lithium battery to the outside for heat dissipation. Since the heat conductive plate is mostly fixed on the battery box, the heat dissipation effect of the existing lithium battery pack is poor. The existing technology also uses airflow to accelerate the heat dissipation of the battery pack. However, when the lithium battery is in a high-intensity operating state, the airflow rate may be too low, resulting in the inability to dissipate the heat of the lithium battery in time. Therefore, how to reasonably solve this problem is what we need to consider. Summary of the invention
[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and propose a heat dissipation type lithium battery pack. The device accelerates the gas flow on the surface of the heat conductive plate and improves the heat dissipation effect of the lithium battery pack by coordinating the rotation of multiple heat conductive plates and the flow of gas. The temperature of the air flow is kept at a lower state through the circulation of low-temperature water, which further improves the heat dissipation effect of the lithium battery pack. At the same time, when the lithium battery is running at high speed, the gas flow around the heat conductive plate will be accelerated to ensure that the lithium battery can dissipate heat normally.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] A heat dissipation type lithium battery pack comprises a shell, wherein two installation cavities are provided in the shell, and lithium battery bodies are installed in the two installation cavities, and two flow cavities and a connecting cavity are provided in the shell, and the adjacent sides of the two flow cavities are connected with the corresponding installation cavities through a first circular opening, and the left and right sides of the connecting cavity are connected with the two installation cavities through a second circular opening, and the first rotating rods are rotatably connected on the inner walls of the opposite sides of the two flow cavities, and heat conducting plates are provided in the two first circular openings and the second circular openings, and the adjacent sides of the two first rotating rods are fixedly connected with the corresponding heat conducting plates, and the adjacent sides of the two heat conducting plates located in the middle are commonly fixedly connected with a cross bar, and the inner top of the connecting cavity is fixedly connected with a mounting block, and the cross bar passes through the mounting block and is rotatably connected with the mounting block.
[0007] Preferably, a rectangular cavity is provided in the shell, the rectangular cavity is communicated with the two flow cavities and the connecting cavity through a connecting port, and the connecting cavity and the two flow cavities are communicated with the outside through an air outlet.
[0008] Preferably, a transmission cavity is provided in the shell, a driving motor is installed on the right side of the shell, the output shaft end of the driving motor extends into the transmission cavity and is fixedly connected to a second rotating rod, the second rotating rod is connected to the two first rotating rods through a first transmission assembly, and the second rotating rod is connected to the cross rod through a second transmission assembly.
[0009] Preferably, a vertical box is provided on the right side of the shell, and the inner walls on the left and right sides of the vertical box are rotatably connected to a third rotating rod, a cam is provided on the third rotating rod, and a piston is slidably connected to the inner wall of the vertical box, and the top space of the piston is connected to the outside through an air inlet pipe, and the top space of the piston is connected to the right side space of the rectangular cavity through an air outlet pipe, and both the air inlet pipe and the air outlet pipe are provided with a one-way valve.
[0010] Preferably, the left side of the second rotating rod extends into the vertical box, and the second rotating rod is transmission-connected with the third rotating rod via a third transmission assembly.
[0011] Preferably, a telescopic rod is fixedly connected to the inner bottom of the vertical box, a sliding block is fixedly connected to the telescopic end of the telescopic rod, the sliding block is elastically connected to the bottom space of the vertical box by a second spring, the lower end of the sliding block and the inner bottom of the vertical box are jointly fixedly connected to a folding airbag, a water tank is provided at the lower end of the shell, a serpentine tube is provided on the inner wall of the air inlet pipe, a liquid outlet end of the serpentine tube is communicated with the bottom space of the water tank, the folding airbag is communicated with the bottom space of the water tank through a liquid inlet pipe, the liquid inlet end of the serpentine tube is communicated with the folding airbag, and both the liquid inlet pipe and the liquid inlet end of the serpentine tube are provided with a one-way valve.
[0012] Preferably, electromagnets are provided on the inner walls on opposite sides of the two flow chambers, magnetic plates are slidably connected in the two flow chambers, the two first rotating rods pass through the corresponding magnetic plates, and the adjacent surfaces of the two magnetic plates and the corresponding electromagnets are elastically connected by a first spring.
[0013] Preferably, the first transmission assembly includes a first transmission wheel arranged on the second rotating rod and the first rotating rod, and the two first transmission wheels are connected by a first transmission belt. The second transmission assembly includes a second transmission wheel arranged on the second rotating rod and the cross rod, and the two second transmission wheels are connected by a second transmission belt. The third transmission assembly includes a third transmission wheel arranged on the second rotating rod and the third rotating rod, and the two third transmission wheels are connected by a third transmission belt.
[0014] The present invention has the following beneficial effects:
[0015] 1. Compared with the prior art, the cross bar, two first rotating rods and piston are arranged to accelerate the gas flow around the heat conducting plate by airflow, thereby improving the heat dissipation effect of the lithium battery pack. At the same time, the operation of the driving motor drives the rotation of multiple heat conducting plates, so that each position of the heat conducting plate can be in contact with the airflow, further improving the heat dissipation effect of the lithium battery pack;
[0016] 2. Compared with the prior art, by setting the folded airbag and the serpentine tube, in the process of heat dissipation of the lithium battery pack, the airflow passing through the air intake pipe is cooled by low-temperature water, so that the airflow flowing through the heat conduction plate is a low-temperature airflow, thereby increasing the energy of heat exchange between the heat conduction plate and the airflow, and further improving the heat dissipation effect of the lithium battery;
[0017] 3. Compared with the prior art, by setting up the electromagnet and the magnetic plate, when the lithium battery pack is overloaded, the magnetic plate will move closer to the lithium battery, thereby increasing the air flow rate on the surface of the heat conducting plate and accelerating the heat dissipation on the heat conducting plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic structural diagram of a heat dissipation type lithium battery pack proposed by the present invention;
[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;
[0020] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;
[0021] Figure 4 for Figure 1 Schematic diagram of the back side.
[0022] In the figure: 1 shell, 2 rectangular cavity, 3 installation cavity, 4 lithium battery body, 5 connection port, 6 electromagnet, 7 first spring, 8 magnetic plate, 9 flow cavity, 10 first rotating rod, 11 first transmission assembly, 12 heat conducting plate, 13 cross bar, 14 second transmission assembly, 15 mounting block, 16 air outlet, 17 drive motor, 18 transmission cavity, 19 vertical box, 20 air inlet pipe, 21 air outlet pipe, 22 cam, 23 sliding block, 24 telescopic rod, 25 second spring, 26 second rotating rod, 27 folding airbag, 28 liquid inlet pipe, 29 serpentine tube, 30 water storage tank, 31 third spring, 32 third rotating rod, 33 third transmission assembly, 34 piston. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0024] Reference Figure 1-Figure 4 A heat dissipation type lithium battery pack comprises a shell 1, wherein the shell 1 is provided with two mounting cavities 3, wherein the two mounting cavities 3 are both provided with lithium battery bodies 4, wherein the shell 1 is provided with two flow cavities 9 and a connecting cavity, wherein the adjacent sides of the two flow cavities 9 are connected with the corresponding mounting cavities 3 through a first circular opening, and the left and right sides of the connecting cavity are both connected with the two mounting cavities 3 through a second circular opening, and the inner walls of the opposite sides of the two flow cavities 9 are both rotatably connected with first rotating rods 10, and heat conducting plates 12 are both provided in the two first circular openings and the second circular openings, and the adjacent sides of the two first rotating rods 10 are fixedly connected with the corresponding heat conducting plates 12, and the adjacent sides of the two heat conducting plates 12 located in the middle are commonly fixedly connected with a cross bar 13, and the inner top of the connecting cavity is fixedly connected with a mounting block 15, and the cross bar 13 passes through the mounting block 15 and is rotatably connected with the mounting block 15.
[0025] A rectangular cavity 2 is provided in the shell 1 , and the rectangular cavity 2 is connected with the two flow cavities 9 and the connecting cavity through a connecting port 5 , and the connecting cavity and the two flow cavities 9 are connected with the outside through an air outlet 16 .
[0026] Among them, a transmission chamber 18 is provided in the shell 1, and a driving motor 17 is installed on the right side of the shell 1. The end of the output shaft of the driving motor 17 extends into the transmission chamber 18 and is fixedly connected to the second rotating rod 26. The second rotating rod 26 and the two first rotating rods 10 are both connected through the first transmission assembly 11. The first transmission assembly 11 includes a first transmission wheel arranged on the second rotating rod 26 and the first rotating rod 10, and the two first transmission wheels are connected through the first transmission belt. The second rotating rod 26 is connected to the cross bar 13 through the second transmission assembly 14. The second transmission assembly 14 includes a second transmission wheel arranged on the second rotating rod 26 and the cross bar 13, and the two second transmission wheels are connected through the second transmission belt.
[0027] Among them, a vertical box 19 is provided on the right side of the shell 1, and the inner walls on the left and right sides of the vertical box 19 are rotatably connected with a third rotating rod 32, and a cam 22 is provided on the third rotating rod 32. The inner wall of the vertical box 19 is slidably connected with a piston 34, and the top space of the piston 34 is connected with the outside through the air inlet pipe 20, and the top space of the piston 34 is connected with the right side space of the rectangular cavity 2 through the air outlet pipe 21. Both the air inlet pipe 20 and the air outlet pipe 21 are provided with a one-way valve, and the outside gas enters the top space of the vertical box 19 in one direction through the air inlet pipe 20, and the gas in the top space of the vertical box 19 enters the rectangular cavity 2 in one direction through the air outlet pipe 21. The left side of the second rotating rod 26 extends into the vertical box 19, and the second rotating rod 26 and the third rotating rod 32 are connected in transmission through a third transmission assembly 33. The third transmission assembly 33 includes a third transmission wheel arranged on the second rotating rod 26 and the third rotating rod 32, and the two third transmission wheels are connected in transmission through a third transmission belt.
[0028] Among them, the inner bottom of the vertical box 19 is fixedly connected with a telescopic rod 24, and the telescopic end of the telescopic rod 24 is fixedly connected with a sliding block 23. The sliding block 23 and the bottom space of the vertical box 19 are elastically connected by a second spring 25. The lower end of the sliding block 23 and the inner bottom of the vertical box 19 are jointly fixedly connected with a folding airbag 27. A water tank 30 is provided at the lower end of the shell 1. A serpentine tube 29 is provided on the inner wall of the air inlet pipe 20. The liquid outlet end of the serpentine tube 29 is connected with the bottom space of the water tank 30. The folding airbag 27 is connected with the bottom space of the water tank 30 through a liquid inlet pipe 28. The liquid inlet end of the serpentine tube 29 is connected with the folding airbag 27. Both the liquid inlet pipe 28 and the liquid inlet end of the serpentine tube 29 are provided with a one-way valve. The water in the water tank 30 is filled with low-temperature water. The water in the water tank 30 enters the folding airbag 27 in one direction through the liquid inlet pipe 28, and the inside of the folding airbag 27 is discharged into the serpentine tube 29 in one direction.
[0029] Among them, electromagnets 6 are provided on the inner walls of the opposite sides of the two flow chambers 9, magnetic plates 8 are slidably connected in the two flow chambers 9, two first rotating rods 10 penetrate the corresponding magnetic plates 8, and the adjacent surfaces of the two magnetic plates 8 and the corresponding electromagnets 6 are elastically connected through the first springs 7. A controller is provided. When the lithium battery pack is running at high load, the controller controls the two electromagnets 6 to be energized. After the two electromagnets 6 are energized, they repel each other with the adjacent sides of the corresponding magnetic plates 8 in the same manner.
[0030] The present invention can explain its functional principle through the following operation mode: during the operation of the lithium battery pack, since the plurality of heat conducting plates 12 are always in contact with the corresponding lithium battery body 4, the heat generated by the lithium battery body 4 is conducted to the heat conducting plates 12;
[0031] During the operation of the lithium battery pack, the driving motor 17 is in a running state, so that the second rotating rod 26 rotates, and the rotation of the second rotating rod 26 is driven by the third transmission assembly 33, so that the third rotating rod 32 rotates. Due to the elastic effect of the second spring 25 and the third spring 31, the piston 34 and the sliding block 23 are always in a state of abutting against the cam 22. The rotation of the third rotating rod 32 drives the cam 22 to rotate, so that the piston 34 and the sliding block 23 continuously move up and down;
[0032] When the piston 34 moves upward, the gas in the top space of the vertical box 19 is pressed into the rectangular cavity 2 through the gas outlet pipe 21, and then enters the two flow cavities 9 and the connecting cavity through the connecting port 5, so that the airflow flows in the flow cavity 9 and the connecting cavity and is discharged to the outside through the gas outlet 16, so that the airflow can absorb the heat on the heat conducting plate 12, thereby dissipating the heat of the lithium battery body 4;
[0033] When the piston 34 moves downward, the external air enters the top space of the vertical box 19 through the air inlet pipe 20. During the rotation of the second rotating rod 26, the first transmission assembly 11 and the second transmission assembly 14 are arranged so that each position of the plurality of heat conducting plates 12 can contact with the air flow, thereby further increasing the speed of heat dissipation on the heat conducting plates 12, thereby improving the heat dissipation effect on the lithium battery.
[0034] In the process of the sliding block 23 moving up and down, the folded airbag 27 will be continuously stretched and contracted. When the folded airbag 27 is stretched, the internal space of the folded airbag 27 increases and the air pressure decreases, so that the water in the water tank 30 enters the folded airbag 27. When the folded airbag 27 is contracted, the space in the folded airbag 27 decreases and the pressure increases, so that the water is pressed into the serpentine tube 29 and then flows back into the water tank 30, so that the airflow passing through the air inlet pipe 20 is always in a low temperature state.
[0035] When the lithium battery pack is in a high-load operation state, the lithium battery body 4 generates more heat. At this time, the controller controls the two electromagnets 6 to be energized. After the two electromagnets 6 are energized, they will produce a repulsive force on the corresponding magnetic plates 8, so that the two magnetic plates 8 move relative to each other, so that the flow space of the gas in the flow chamber 9 is reduced, so that the gas flows faster in the flow chamber 9, and the heat on the heat conducting plate 12 is dissipated faster:
[0036] It is worth mentioning that when the lithium battery body 4 is in a normal operating state, the two electromagnets 6 are in a power-off state, so that the airflow speed in the two flow chambers 9 is slower, thereby avoiding the situation where the working environment temperature of the lithium battery body 4 is too low due to the gas flow rate being too fast, thereby reducing the working efficiency of the lithium battery body 4.
[0037] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A heat dissipation type lithium battery pack, comprising a housing (1), characterized in that: Two mounting cavities (3) are provided in the shell (1), and a lithium battery body (4) is installed in each of the two mounting cavities (3). Two flow cavities (9) and a connecting cavity are provided in the shell (1). The adjacent sides of the two flow cavities (9) are connected to the corresponding mounting cavities (3) through a first circular opening, and the left and right sides of the connecting cavity are connected to the two mounting cavities (3) through a second circular opening. First rotating rods (10) are rotatably connected to the inner walls of the two flow cavities (9) on the opposite sides. Heat conducting plates (12) are provided in the two first circular openings and the second circular openings. The adjacent sides of the two first rotating rods (10) are fixedly connected to the corresponding heat conducting plates (12). The adjacent sides of the two heat conducting plates (12) located in the middle are fixedly connected to a cross bar (13). The inner top of the connecting cavity is fixedly connected to a mounting block (15), and the cross bar (13) passes through the mounting block (15) and is rotatably connected to the mounting block (15). A transmission chamber (18) is provided in the housing (1), a drive motor (17) is installed on the right side of the housing (1), a distal end of an output shaft of the drive motor (17) extends into the transmission chamber (18) and is fixedly connected to a second rotating rod (26), the second rotating rod (26) and the two first rotating rods (10) are both transmission-connected via a first transmission assembly (11), and the second rotating rod (26) and the crossbar (13) are transmission-connected via a second transmission assembly (14); A vertical box (19) is provided on the right side of the housing (1), and the inner walls on the left and right sides of the vertical box (19) are rotatably connected to a third rotating rod (32), and a cam (22) is provided on the third rotating rod (32). A piston (34) is slidably connected to the inner wall of the vertical box (19), and the top space of the piston (34) is connected to the outside through an air inlet pipe (20), and the top space of the piston (34) is connected to the right side space of the rectangular cavity (2) through an air outlet pipe (21), and both the air inlet pipe (20) and the air outlet pipe (21) are provided with a one-way valve; The inner bottom of the vertical box (19) is fixedly connected to a telescopic rod (24), the telescopic end of the telescopic rod (24) is fixedly connected to a sliding block (23), the sliding block (23) and the bottom space of the vertical box (19) are elastically connected via a second spring (25), the lower end of the sliding block (23) and the inner bottom of the vertical box (19) are fixedly connected to a folding airbag (27), the lower end of the housing (1) is provided with a water tank (30), the inner wall of the air inlet pipe (20) is provided with a serpentine pipe (29), the liquid outlet end of the serpentine pipe (29) is in communication with the bottom space of the water tank (30), the folding airbag (27) is in communication with the bottom space of the water tank (30) via a liquid inlet pipe (28), the liquid inlet end of the serpentine pipe (29) is in communication with the folding airbag (27), and the liquid inlet ends of the liquid inlet pipe (28) and the serpentine pipe (29) are both provided with a one-way valve; Electromagnets (6) are provided on inner walls on opposite sides of the two flow chambers (9), magnetic plates (8) are slidably connected inside the two flow chambers (9), the two first rotating rods (10) penetrate the corresponding magnetic plates (8), and the adjacent surfaces of the two magnetic plates (8) and the corresponding electromagnets (6) are elastically connected via first springs (7).
2. A heat dissipation type lithium battery pack according to claim 1, characterized in that: A rectangular cavity (2) is provided in the housing (1); the rectangular cavity (2) is in communication with the two flow cavities (9) and the connecting cavity via a connecting port (5); the connecting cavity and the two flow cavities (9) are in communication with the outside via an air outlet (16).
3. A heat dissipation type lithium battery pack according to claim 1, characterized in that: The left side of the second rotating rod (26) extends into the vertical box (19), and the second rotating rod (26) is transmission-connected to the third rotating rod (32) via a third transmission assembly (33).
4. A heat dissipation type lithium battery pack according to claim 3, characterized in that: The first transmission assembly (11) comprises a first transmission wheel arranged on the second rotating rod (26) and the first rotating rod (10), and the two first transmission wheels are connected to each other through a first transmission belt. The second transmission assembly (14) comprises a second transmission wheel arranged on the second rotating rod (26) and the cross rod (13), and the two second transmission wheels are connected to each other through a second transmission belt. The third transmission assembly (33) comprises a third transmission wheel arranged on the second rotating rod (26) and the third rotating rod (32), and the two third transmission wheels are connected to each other through a third transmission belt.