An adaptive heat pipe cooling device for power batteries

Abstract

The present invention relates to an adaptive heat pipe heat dissipation device for power batteries and pertains to the technical field of power battery heat dissipation. It includes a battery housing and battery cells arranged at equal intervals inside the battery housing. It further includes: four positioning blocks arranged at equal intervals, and heat dissipation plates are respectively provided between the four positioning blocks. The heat dissipation plates are attached to the outer walls of the battery cells, and a number of heat dissipation components are equally spaced and installed at one end of the heat dissipation plates away from the battery cells. The heat dissipation components of the present invention achieve the heat dissipation of the power battery through heat pipes, and the heat pipes are distributed in a conical structure, greatly improving the heat diffusion. Further, the heat pipes of the present invention can automatically adjust the heat dissipation area of the condensation end according to the heat dissipation intensity of the power battery, thereby realizing the adjustment of the heat dissipation performance of the heat pipes.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery heat dissipation, and in particular to an adaptive power battery heat pipe heat dissipation device. Background Art

[0002] The power battery heat pipe cooling device is a device used to dissipate heat from the power battery. It conducts the heat generated in the power battery to the radiator through a heat pipe, and then dissipates the heat into the air to keep the operating temperature of the battery within an appropriate range.

[0003] A heat pipe is a heat transfer element that uses liquid to transfer heat in a pipe. It transfers heat through the vaporization and condensation of liquid inside the pipe, and has the advantages of efficient heat transfer, energy saving, and environmental protection. In power batteries, heat pipes can effectively transfer the heat generated by the battery to the radiator, improve heat dissipation efficiency, and avoid safety hazards caused by overheating of the battery.

[0004] For example, the Chinese patent with publication number CN110635198A discloses that the present invention relates to the field of thermal management technology of power batteries, and provides a heat dissipation device for power batteries, which includes: a plurality of fin assemblies arranged at intervals and a plurality of heat pipe assemblies arranged at intervals; a plurality of battery units arranged in an array in coordination with the heat pipe assemblies are arranged between the bottoms of adjacent heat pipe assemblies, and a fin assembly is arranged between the tops of adjacent heat pipe assemblies. By arranging the fin assembly and the heat pipe assembly, during the process of heat generated by battery charging or discharging, the heat is quickly extracted through the heat pipe assembly attached to the battery and transmitted to the fin assembly, thereby achieving heat dissipation of the battery and effectively solving problems such as uneven temperature distribution and local overheating of the battery.

[0005] However, the above heat dissipation device still has some shortcomings in actual use:

[0006] 1. In the prior art, battery heat dissipation is achieved to effectively solve the problems of uneven battery temperature distribution and local overheating. However, power batteries need to be used for a long time. In summer, the power batteries can effectively dissipate heat. However, when winter comes and the weather outside is cold, the heat of the power batteries is discharged, causing the power batteries to be affected by the winter temperature and their performance to decline. Therefore, the prior art cannot achieve adaptive adjustment of the battery heat dissipation performance.

[0007] 2. Furthermore, in the prior art, the thermal conductivity of the heat pipe for achieving heat dissipation of the battery is constant, and the thermal conductivity of the heat pipe cannot be adjusted, resulting in the thermal conductivity of the heat pipe being relatively single and unable to adjust its thermal conductivity.

[0008] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing heat dissipation devices. Summary of the invention

[0009] To solve the above problems, the present invention provides an adaptive heat pipe cooling device for power batteries, adopting the following technical solutions:

[0010] An adaptive heat pipe cooling device for power batteries, comprising a battery housing and battery cells arranged at equal intervals inside the battery housing, further comprising: four groups of positioning blocks arranged at equal intervals, and heat dissipation plates are respectively arranged between the four groups of positioning blocks. The heat dissipation plates are attached to the outer walls of the battery cells, and a number of heat dissipation components are equally spaced and installed at one end of the heat dissipation plates away from the battery cells.

[0011] The heat dissipation components include a number of heat pipes distributed in a conical shape. The evaporation ends of the heat pipes are gathered together and are hinged to the heat dissipation plates. The condensation ends of the heat pipes are far from the battery cells and approach the direction of the battery housing, and are abutted against the battery housing and dissipate heat outward.

[0012] Preferably, a right-angled activity groove is opened in the positioning block. A number of fixing columns are slidably arranged in the activity groove, and a horizontal sliding groove for the fixing columns to slide is opened in the activity groove. A number of vertically distributed mounting blocks are slidably arranged on the fixing columns. An installation pulling groove is opened on one side of the mounting block. The heat dissipation plate is arranged in the installation card slot of the mounting block.

[0013] Preferably, a telescopic center-aligning rod is hinged between two positioning blocks on the same side in the length direction of the battery housing, and a telescopic center-aligning rod is also hinged between two positioning blocks on the same side in the width direction of the battery housing. A telescopic motor is installed on one of the positioning blocks, and the telescopic motor is arranged on the inner wall of the battery housing.

[0014] Preferably, the center-aligning rod is a telescopic structure.

[0015] Preferably, a first adjusting tension spring connected to both ends of the fixing column is arranged in the horizontal sliding groove of the positioning block, and the first adjusting tension spring has a tendency to squeeze the mounting block towards the battery cell.

[0016] A second adjusting tension spring for controlling the displacement of the heat dissipation plate is slidably sleeved on the fixing column.

[0017] Preferably, a separator is further arranged on the heat dissipation plate. The separator includes a separation plate. The separation plate is connected between the spaced positioning blocks among several positioning blocks on the same side inside the battery housing. An electric push rod is connected to the separation plate, and the electric push rod is horizontally distributed.

[0018] Preferably, a connecting column is provided in the middle of the heat pipes where several of the heat dissipation components are distributed in a conical shape. A fan that blows air outward is provided on the connecting column. The fan is integrally connected with a motor. An adjusting ring is also slidably mounted on the connecting column. Adjusting rods are equidistantly provided in the circumferential direction of the adjusting ring. One end of the adjusting rod away from the adjusting ring is connected to the side wall of the heat pipe.

[0019] An adjusting spring is sleeved on the connecting column to control the position of the adjusting ring.

[0020] Preferably, the heat pipe includes a sealed housing, a first wick, a thermally deformable metal sheet, and a second wick. The sealed housing is provided on the heat dissipation plate. The first wick is provided on the inner wall of the sealed housing. The second wick abuts against the first wick.

[0021] Several thermally deformable metal sheets are equidistantly provided on the inner wall of the sealed housing. One end of the thermally deformable metal sheet is connected to one side of the second wick.

[0022] Preferably, several heat spreaders are further provided between the battery cells. The heat spreaders are in contact with the heat dissipation plate.

[0023] Preferably, the connecting column is of a hollow structure. A strip-shaped groove for the adjusting ring to slide is provided on the connecting column. Several deformation pressing sheets are equidistantly installed along the circumferential direction inside the connecting column. The deformation end of the deformation pressing sheet abuts against the adjusting ring.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] First, through the cooperation of the heat dissipation plate and the positioning block, the modular composition of the heat dissipation plate is realized in the present invention. It can not only ensure the heat dissipation performance of the power battery, but also be modularly disassembled during the repair or replacement of the power battery, rather than being able to disassemble the entire heat dissipation device, greatly improving the repair efficiency and economy of the power battery.

[0026] Second, the heat dissipation components of the present invention use heat pipes to dissipate the temperature of the power battery, and the heat pipes are distributed in a conical structure, greatly improving the heat diffusion efficiency. Further, the present invention can also increase the heat dissipation area of the condensation end of the heat pipe and adjust the heat dissipation performance by adjusting its heat dissipation area.

[0027] III. The separator of the present invention can achieve the contact and separation between the heat dissipation plate and the battery cell. When the external environment is poor, the electric push rod is activated, and the output end of the electric push rod drives the spaced-apart heat dissipation plates among several heat dissipation plates away from the battery cell through the separation plate. At this time, a gap appears between some heat dissipation plates and the battery cell, and the two are separated, so that some heat dissipation plates cannot play the role of heat dissipation, indirectly reducing the heat dissipation power, ensuring the heat dissipation of the power battery in winter, and preventing the power battery from losing temperature due to too strong heat dissipation effect.

[0028] IV. The heat pipe of the present invention can automatically adjust the heat dissipation area of its condensation end according to the heat dissipation intensity of the power battery, thereby realizing the adjustment of the heat dissipation performance of the heat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the drawings and embodiments.

[0030] Figure 1 It is a schematic diagram of the main structure of the power battery of the present invention.

[0031] Figure 2 It is a schematic diagram of the structure among the battery case, the battery cell and the heat dissipation component of the present invention.

[0032] Figure 3 It is a schematic diagram of the structure of the battery cell and the heat dissipation component of the present invention from the first perspective.

[0033] Figure 4 It is a schematic diagram of the structure of the battery cell and the heat dissipation component of the present invention from the second perspective.

[0034] Figure 5 It is a plan view of the battery cell and the heat dissipation component of the present invention.

[0035] Figure 6 It is a schematic diagram of the structure between the positioning block and the heat dissipation plate of the present invention.

[0036] Figure 7 It is a schematic diagram of the structure between the positioning block and the separator of the present invention.

[0037] Figure 8 It is the present invention Figure 7 The partial enlarged view of A in.

[0038] Figure 9 It is a schematic diagram of the structure between the telescopic centering rod and the positioning block of the present invention.

[0039] Figure 10 It is a schematic diagram of the structure between the heat dissipation component and the heat dissipation plate of the present invention.

[0040] Figure 11 It is a schematic diagram of the structure between the heat dissipation component and the heat pipe of the present invention.

[0041] Figure 12 It is a schematic diagram of the structure among the strip groove, the deformable pressing sheet and the adjusting ring of the present invention.

[0042] Figure 13 It is a schematic diagram of the structure among the sealed shell, the first liquid absorbent core, the second liquid absorbent core and the thermally deformed metal sheet of the present invention.

[0043] Figure 14 The present invention Figure 13 A local enlarged view of point B in FIG.

[0044] Explanation of the reference numerals in the accompanying drawings: 1. battery casing; 10. battery cell; 2. positioning block; 3. heat sink; 4. heat dissipation component; 5. heat pipe; 20. movable groove; 21. fixed column; 22. horizontal slide groove; 23. mounting block; 24. telescopic center rod; 25. telescopic motor; 6. No. 1 adjusting tension spring; 7. No. 2 adjusting tension spring; 8. separator; 80. separation plate; 81. electric push rod; 40. connecting column; 41. fan; 42. adjusting ring; 43. adjusting rod; 44. adjusting spring; 50. sealing casing; 51. No. 1 liquid absorbent core; 52. No. 2 liquid absorbent core; 53. thermally deformed metal sheet; 9. heat spreader; 400. strip groove; 401. deformable pressing sheet. DETAILED DESCRIPTION

[0045] The following is combined with Figures 1 - 14 This application is described in further detail.

[0046] The embodiment of the present application discloses an adaptive power battery heat pipe cooling device; it is mainly used in the process of heat dissipation of power batteries.

[0047] In the prior art, battery heat dissipation is achieved to effectively solve the problems of uneven battery temperature distribution and local overheating. However, power batteries need to be used for a long time. In summer, the power batteries can effectively dissipate heat. However, when winter comes and the weather outside is cold, the heat of the power batteries is discharged, causing the power batteries to be affected by the winter temperature and their performance to decline. Therefore, the prior art cannot achieve adaptive adjustment of the battery heat dissipation performance, which results in the heat inside the battery being unable to maintain itself in a suitable environment to work in winter, resulting in poor working efficiency of the power battery.

[0048] Furthermore, in the prior art, the thermal conductivity of the heat pipe 5 for heat dissipation of the battery is constant, and the thermal conductivity of the heat pipe 5 cannot be adjusted, resulting in the thermal conductivity of the heat pipe 5 being relatively simple and unable to adjust its thermal conductivity.

[0049] Embodiment 1:

[0050] Reference Figure 1 and Figure 2As shown, it is a schematic diagram of the main structure of the heat pipe 5 heat dissipation device in this application; an adaptive power battery heat pipe heat dissipation device, including a battery housing 1 and battery cells 10 arranged at equal intervals inside the battery housing 1.

[0051] The main function of the power battery is to store and release electrical energy, providing a power source for electric vehicles. It converts the stored chemical energy into electrical energy through chemical reactions to drive the vehicle. The battery cell 10 is the basic unit of the power battery, responsible for storing and releasing electrical energy. The cell consists of a positive electrode, a negative electrode, an electrolyte, and a separator, and realizes the efficient utilization of energy through the charge and discharge process. High-quality cells can provide higher energy density, extend the cruising range, reduce battery aging and performance degradation, and lower the replacement frequency and usage cost.

[0052] The battery housing 1 is mainly used for the safety of the battery cell 10 to ensure the safety of the battery cell 10.

[0053] Refer to Figure 2 and Figure 3 As shown, it is a schematic diagram of the structure of the heat dissipation plate 3 in this application; four groups of positioning blocks 2 arranged at equal intervals, and heat dissipation plates 3 are respectively arranged between the four groups of positioning blocks 2. The heat dissipation plate 3 is attached to the outer wall of the battery cell 10, and a number of heat dissipation components 4 are equally spaced and installed at one end of the heat dissipation plate 3 away from the battery cell 10.

[0054] The heat dissipation component 4 includes a number of heat pipes 5 distributed in a conical shape. The evaporation ends of the heat pipes 5 are gathered together and arranged on the heat dissipation plate 3. The condensation ends of the heat pipes 5 are far from the battery cell 10 and approach the battery housing 1, and abut against the battery housing 1.

[0055] Refer to Figure 4 and Figure 5 As shown, a number of heat dissipation fins 9 are also arranged between the battery cells 10, and the heat dissipation fins 9 are in contact with the heat dissipation plate 3.

[0056] The positioning blocks 2 are arranged at the four corners of the battery housing 1, and the heat dissipation plates 3 are equally spaced around the battery cells 10. When the battery is working, a large amount of heat energy will be generated by the battery, and these heat energies will diffuse outward. Then the heat is absorbed by the heat dissipation fins 9, and then these heats are transferred to the heat dissipation plate 3 through the heat dissipation fins 9, so that the heat dissipation plate 3 absorbs the heat energy generated by the battery cell 10. These heat energies are then received by the evaporation ends of the heat pipes 5, and the heat quickly moves from the evaporation ends of the heat pipes 5 to the condensation ends, transferring the heat to the outside of the battery housing 1, ensuring the timely diffusion of the heat, thereby controlling the temperature of the battery cell 10 and ensuring that the battery cell 10 can work in a suitable environment, thus maintaining its best performance.

[0057] However, to ensure the stability of heat dissipation, the present application also needs to limit the heat dissipation plate 3 and the heat spreader 9 to ensure that the heat dissipation plate 3 and the heat spreader 9 can evenly contact the surface of the battery cell 10.

[0058] Refer to Figure 6 and Figure 7 As shown, a right-angled activity groove 20 is formed in the positioning block 2. A plurality of fixing columns 21 are slidably arranged in the activity groove 20, and a horizontal chute 22 for the fixing columns 21 to slide is formed in the activity groove 20. A plurality of mounting blocks 23 vertically distributed are slidably arranged on the fixing columns 21. An installation pulling groove is formed on one side of the mounting block 23. The heat dissipation plate 3 is hinged and arranged in the installation card slot of the mounting block 23.

[0059] A first adjusting tension spring 6 connected to both ends of the fixing column 21 is arranged in the horizontal chute 22 of the positioning block 2.

[0060] A second adjusting tension spring 7 for controlling the displacement of the heat dissipation plate 3 is slidably sleeved on the fixing column 21.

[0061] It should be noted that the heat dissipation plate 3 is rotatably arranged on the fixing column 21, and the fixing column 21 can be slidably arranged in the activity groove 20 of the positioning block 2.

[0062] The second adjusting tension spring 7 is arranged on the fixing column 21. By squeezing the heat dissipation plate 3 through the second adjusting tension spring 7, the heat dissipation plate 3 can be abutted against the battery cell 10, ensuring that when the battery cell 10 dissipates heat, the heat of the battery cell 10 can be quickly transferred to the heat dissipation plate 3. In the initial state, the second adjusting tension spring 7 has an outward elastic force, so that the second adjusting tension spring 7 squeezes the heat dissipation plate 3.

[0063] The mounting block 23 is made of insulating material to avoid electric leakage in case the battery cell 10 is damaged.

[0064] The heat dissipation plate 3 is snap-fitted and installed inside the mounting block 23 for the purpose of facilitating the replacement of the heat dissipation plate 3. If the power battery is damaged during use, the damaged part of the power battery can be replaced, and at the same time, the heat dissipation plate 3 at the corresponding part can be replaced separately, avoiding the overall replacement of all the heat dissipation plates 3 in the power battery.

[0065] Through the cooperation of the heat dissipation plate 3 and the positioning block 2, the modular composition of the heat dissipation plate 3 is realized. It can not only ensure the heat dissipation performance of the power battery, but also be modularly disassembled during the maintenance or replacement of the power battery, instead of disassembling the entire heat dissipation device, greatly improving the maintenance efficiency and economy of the power battery.

[0066] Refer to Figure 7 、 Figure 8 and Figure 9As shown in the figure, it is a schematic structural diagram of adjusting the angle of the heat dissipation plate 3 in this application, specifically as follows. A telescopic centering rod 24 is hinged between two positioning blocks 2 on the same side in the length direction of the battery housing 1. A telescopic centering rod 24 is also hinged between two positioning blocks 2 on the same side in the width direction of the battery housing 1. The middle part of the telescopic centering rod 24 rotates and abuts against the inner wall of the battery housing 1. A telescopic motor 25 is installed on one side of the positioning block 2, and the telescopic motor 25 is arranged on the inner wall of the battery housing 1.

[0067] During specific implementation, start the telescopic motor 25. The telescopic motor 25 controls the positioning block 2 on one side inside the battery housing 1 to move upward. At this time, the telescopic centering rod 24 on the positioning block 2 rotates around the central point in the middle, causing the two adjacent positioning blocks 2 near the positioning block 2 connected to the telescopic motor 25 to move downward. At this time, the positioning block 2 diagonally opposite to the positioning block 2 connected to the telescopic motor 25 moves upward. At this time, the heat dissipation plate 3 between the positioning blocks 2 will tilt. Both ends of the heat dissipation plate 3 ensure the angle adjustment of the heat dissipation plate 3 through the mounting block 23 and the telescopic fixing column 21. The positioning block 2 only moves up and down, and its position remains unchanged.

[0068] After the heat dissipation plate 3 changes from the horizontal state in the initial state to the inclined state, the heat pipes 5 distributed in a conical shape on the heat dissipation plate 3 also tilt synchronously. An appropriate tilt angle can significantly improve the heat transfer efficiency of the heat pipes 5. For example, when using nanofluid as the working medium, when the tilt angle is 75°, the heat transfer coefficients of the evaporation section and the condensation section and the maximum heat transfer power are all significantly improved. In addition, when the tilt angle is 60°, the maximum heat transfer amount of the heat exchanger can reach about 1700W, indicating that an appropriate tilt angle can optimize the heat transfer performance.

[0069] Secondly, enhance heat transfer: Adjusting the tilt angle can improve the flow characteristics inside the heat pipes 5, thereby enhancing heat transfer. For example, it is found that when the tilt angle is 120°, the heat transfer coefficient is the highest, which is suitable for application scenarios that require high heat transfer. In addition, increasing the tilt angle helps to thin the liquid film in the condensation section, thereby enhancing the evaporation and condensation processes

[0070] In addition, reduce thermal resistance: An appropriate tilt angle can reduce the total thermal resistance of the heat pipes 5. For example, when the tilt angle is 60°, the thermal resistance value is the lowest because gravity assists the liquid to flow back to the evaporator. However, too large a tilt angle may increase the difficulty of liquid reflux, resulting in an increase in thermal resistance.

[0071] Look back Figure 7As shown in the figure, further, in order to ensure that the heat dissipation device of the present application can adapt to different weather conditions, the present application also proposes a separator 8, which is specifically as follows: A separator 8 is also provided on the heat dissipation plate 3. The separator 8 includes a separation plate 80. A separation plate 80 is connected between the spaced positioning blocks 2 among several positioning blocks 2 on the same side inside the battery housing 1, and an electric push rod 81 is connected to the separation plate 80.

[0072] In the initial state, several heat dissipation plates 3 in the height direction of the positioning block 2 are all attached to the outer wall of the battery cell 10. At this time, it is the maximum limit heat dissipation state of the present application to ensure the heat dissipation of the battery cell 10; however, when winter comes, the external environment is at a relatively low temperature; if the maximum heat dissipation state is still maintained at this time, it will seriously cause the temperature of the battery cell 10 to drop, making it unable to reach the best working state, and even affecting the service life of the power battery.

[0073] Therefore, the present application proposes a separator 8. When the external environment is poor, the electric push rod 81 is activated. The output end of the electric push rod 81 drives the spaced heat dissipation plates 3 among several heat dissipation plates 3 away from the battery cell 10 through the separation plate 80. At this time, a gap appears between some heat dissipation plates 3 and the battery cell 10, and the two are separated from each other, so that some heat dissipation plates 3 cannot play a heat dissipation role, indirectly realizing a reduction in the heat dissipation power, ensuring the heat dissipation of the power battery in winter, and avoiding the power battery from losing temperature due to too strong heat dissipation effect.

[0074] Refer to Figure 10 、 Figure 11 and Figure 12 As shown, which is a schematic structural diagram of the heat pipe 5 for dissipating heat in the present invention; specifically, a connecting column 40 is provided in the middle of the heat pipes 5 distributed in a conical shape among several heat dissipation components 4. A fan 41 that blows air outward is provided on the connecting column 40. The fan 41 is provided with an integrally connected motor. An adjusting ring 42 is also slidably installed on the connecting column 40. Adjusting rods 43 are equally spaced in the circumferential direction of the adjusting ring 42. One end of the adjusting rod 43 away from the adjusting ring 42 is connected to the side wall of the heat pipe 5.

[0075] An adjusting spring 44 is sleeved on the connecting column 40 to control the position of the adjusting ring 42 through the adjusting spring 44.

[0076] The connecting column 40 is of a hollow structure. A strip-shaped groove 400 for the adjusting ring 42 to slide is opened on the connecting column 40. Several deformation pressing sheets 401 are equally spaced and installed along the circumferential direction inside the connecting column 40. The deformation ends of the deformation pressing sheets 401 abut against the adjusting ring 42.

[0077] In this application, several groups of heat dissipation components 4 are provided, and each group of heat dissipation components 4 is provided with a plurality of heat pipes 5, and the heat pipes 5 are distributed in a conical shape. The design of the evaporation end and the condensation end of the heat pipe 5 is crucial. The evaporation end should be as close as possible to the heat source to quickly absorb heat; the condensation end needs to have sufficient heat dissipation area to effectively dissipate the heat into the environment.

[0078] Therefore, in this application, the evaporation ends of the heat pipes 5 are close to each other for heat absorption; the condensation ends of the heat pipes 5 are distributed obliquely outwards for heat dissipation.

[0079] In the initial state, the adjusting ring 42 is far from one end of the connecting column 40 and the fan 41, and the deformed end of the deformation pressing piece 401 abuts against the adjusting ring 42.

[0080] During specific implementation, when the power battery starts to work, a large amount of heat is generated during its operation. The heat causes the inside of the connecting column 40 to be heated. When the temperature of the deformed end of the deformation pressing piece 401 rises to the limit temperature it can withstand, the deformation pressing piece 401 starts to deform. The deformed end of the deformation pressing piece 401 squeezes the adjusting ring 42, causing the adjusting ring 42 to slide along the connecting column 40, and the adjusting ring 42 moves towards the side of the fan 41. At this time, the adjusting ring 42 squeezes the condensation end of the heat pipe 5 through the adjusting rod 43, causing the condensation end of the heat pipe 5 to expand outwards, thereby increasing the heat dissipation area of its condensation end and greatly improving its heat dissipation efficiency and performance.

[0081] Embodiment 2: On the basis of Embodiment 1, in order to further ensure the heat dissipation efficiency of the heat pipe 5, this application also proposes a heat pipe 5; refer to Figure 13 and Figure 14 As shown, the heat pipe 5 includes a sealed housing 50, a first wick 51, a thermally deformable metal sheet 53, and a second wick 52. The sealed housing 50 is arranged on the heat dissipation plate 3, the first wick 51 is arranged on the inner wall of the sealed housing 50, and the second wick 52 abuts against the first wick 51.

[0082] A number of thermally deformable metal sheets 53 are arranged at equal intervals on the inner wall of the sealed housing 50, and one end of the thermally deformable metal sheet 53 is connected to one side of the second wick 52.

[0083] When the evaporation end of the heat pipe 5 starts to absorb heat, the heat moves towards its condensation end through the first wick 51. However, the size of the first wick 51 is fixed, so its maximum heat dissipation efficiency is constant. In order to improve its heat dissipation performance, this application also proposes a second wick 52.

[0084] In the initial state, the second wick 52 is not in contact with the first wick 51. When the power battery dissipates heat, the heat will be transferred to the thermally deformable metal sheet 53. When the thermally deformable metal sheet 53 deforms, the second wick 52 abuts against the first wick 51, so that an integral body is formed between the second wick 52 and the first wick 51, greatly improving the heat conversion efficiency and ultimately enhancing the heat dissipation performance of the heat pipe 5.

[0085] Embodiment 2:

[0086] Referring to Figure 8 As shown, on the basis of Embodiment 1, in order to ensure the diversity of the angle adjustment of the heat pipe 5, the present application also proposes a plurality of deformation pressing sheets 401 with different performances. Since the deformation temperatures of the deformation pressing sheets 401 made of different materials are different, for the deformation pressing sheets 401 arranged at equal intervals inside the connecting column 40, they can be replaced with deformation pressing sheets 401 made of different materials. For the convenience of description, they are named the first deformation pressing sheet 401, the second deformation pressing sheet 401, and the third deformation pressing sheet 401 here; and the heat-resistant temperatures of the three deformation pressing sheets 401 are all different.

[0087] When the temperature on the heat dissipation plate 3 is low, there is no need to adjust the angle of the heat pipe 5. When the temperature of the heat dissipation plate 3 rises to the medium temperature, the first deformation pressing sheet 401 starts to deform, and the first deformation pressing sheet 401 lifts the adjusting ring 42. At this time, the adjusting ring 42 squeezes the condensation end of the heat pipe 5 through the adjusting rod 43, causing the condensation end to spread outwards.

[0088] When the temperature of the heat dissipation plate 3 rises to the high temperature, the second deformation pressing sheet 401 starts to deform, and the second deformation pressing sheet 401 lifts the adjusting ring 42. At this time, the adjusting ring 42 squeezes the condensation end of the heat pipe 5 through the adjusting rod 43, causing the condensation end to further spread outwards on the basis of the above.

[0089] When the temperature of the heat dissipation plate 3 rises to the maximum temperature, the third deformation pressing sheet 401 starts to deform, and the third deformation pressing sheet 401 lifts the adjusting ring 42. At this time, the adjusting ring 42 squeezes the condensation end of the heat pipe 5 through the adjusting rod 43, causing the condensation end to further spread outwards on the basis of the above and move outwards to the maximum range, and several heat pipes 5 are in an umbrella-like structure.

[0090] During operation: First step, when the battery is operating, it generates a large amount of heat energy. This heat energy diffuses outwards, and then the heat is absorbed by the heat spreader 9. Subsequently, this heat is transferred to the heat sink 3 through the heat spreader 9, enabling the heat sink 3 to absorb the heat energy generated by the battery cells 10. This heat energy is then absorbed by the evaporation end of the heat pipe 5, and the heat quickly moves from the evaporation end of the heat pipe 5 to the condensation end, transferring the heat to the outside of the battery case 1, ensuring the timely diffusion of heat, thereby controlling the temperature of the battery cells 10 and ensuring that the battery cells 10 can operate in a suitable environment, thus maintaining their optimal performance.

[0091] Second step: If the power battery is damaged during use, the damaged part of the power battery can be replaced, and at the same time, the heat sink 3 at the corresponding part can be replaced individually, avoiding the need to replace all the heat sinks 3 inside the power battery as a whole.

[0092] Third step: Start the telescopic motor 25. The telescopic motor 25 controls the positioning block 2 on one side inside the battery case 1 to move upward. At this time, the telescopic centering rod 24 on the positioning block 2 rotates around the central point in the middle, causing the two adjacent positioning blocks 2 near the positioning block 2 connected to the telescopic motor 25 to move downward. At this time, the positioning block 2 diagonally opposite to the positioning block 2 connected to the telescopic motor 25 moves upward. At this time, the heat sink 3 between the positioning blocks 2 will tilt, and the heat pipes 5 distributed in a conical shape on the heat sink 3 will also tilt synchronously; an appropriate tilt angle can significantly improve the heat transfer efficiency of the heat pipes 5.

[0093] Fourth step: When the external environment is poor, the electric push rod 81 is started. The output end of the electric push rod 81 drives the heat sinks 3 that are spaced apart from each other among several heat sinks 3 to move away from the battery cells 10 through the separation plate 80. At this time, gaps appear between some of the heat sinks 3 and the battery cells 10, and the two are separated from each other, so that some of the heat sinks 3 cannot play a heat dissipation role, indirectly realizing a reduction in the heat dissipation power, ensuring the heat dissipation of the power battery in winter, and preventing the power battery from losing temperature due to too strong heat dissipation effect.

[0094] Fifth step: When the power battery starts to operate, a large amount of heat is generated during its operation. The heat causes the inside of the connecting column 40 to be heated. When the temperature of the deformed end of the deformation piece 401 rises to the limit temperature it can withstand, the deformation piece 401 starts to deform. The deformed end of the deformation piece 401 squeezes the adjusting ring 42, causing the adjusting ring 42 to slide along the connecting column 40 and move towards the side of the fan 41. At this time, the adjusting ring 42 squeezes the condensation end of the heat pipe 5 through the adjusting rod 43, causing the condensation end of the heat pipe 5 to expand outwards, thereby increasing the heat dissipation area of its condensation end and greatly improving its heat dissipation efficiency and performance.

[0095] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An adaptive heat pipe heat dissipation device for power batteries, comprising a battery housing (1) and battery cells (10) arranged at equal intervals inside the battery housing (1), characterized in that: It further includes: Four groups of positioning blocks (2) arranged at equal intervals. Heat dissipation plates (3) are respectively arranged between the four groups of positioning blocks (2). The heat dissipation plates (3) are attached to the outer wall of the battery cell (10). A number of heat dissipation components (4) are equally spaced and installed at one end of the heat dissipation plate (3) away from the battery cell (10); The heat dissipation component (4) includes a number of heat pipes (5) distributed in a conical shape. The evaporation ends of the heat pipes (5) gather together and are hinged to the heat dissipation plate (3). The condensation ends of the heat pipes (5) are away from the battery cell (10) and approach the battery housing (1), and are abutted against the battery housing (1) and dissipate heat outward; A connecting column (40) is arranged in the middle of the heat pipes (5) of a number of the heat dissipation components (4) distributed in a conical shape. A fan (41) that blows air outward is arranged on the connecting column (40). The fan (41) is provided with an integrally connected motor. An adjusting ring (42) is also slidably installed on the connecting column (40). Adjusting rods (43) are equally spaced in the circumferential direction of the adjusting ring (42). One end of the adjusting rod (43) away from the adjusting ring (42) is connected to the side wall of the heat pipe (5); An adjusting spring (44) is sleeved on the connecting column (40) to control the position of the adjusting ring (42); The connecting column (40) is of a hollow structure. A strip-shaped groove (400) for the adjusting ring (42) to slide is opened on the connecting column (40). A number of deformation pressing pieces (401) are equally spaced and installed along the circumferential direction inside the connecting column (40). The deformation ends of the deformation pressing pieces (401) abut against the adjusting ring (42).

2. The adaptive power battery heat pipe heat dissipation device according to claim 1, wherein: A right-angled activity groove (20) is opened in the positioning block (2). A number of fixing columns (21) are slidably arranged in the activity groove (20). A horizontal sliding groove (22) for the fixing column (21) to slide is opened in the activity groove (20). A number of mounting blocks (23) vertically distributed are slidably arranged on the fixing column (21). An installation pulling groove is opened on one side of the mounting block (23). The heat dissipation plate (3) is arranged in the installation pulling groove of the mounting block (23).

3. The adaptive power battery heat pipe heat dissipation device according to claim 1, wherein: A telescopic centering rod (24) is hinged between two positioning blocks (2) on the same side in the length direction of the battery housing (1). A telescopic centering rod (24) is also hinged between two positioning blocks (2) on the same side in the width direction of the battery housing (1). A telescopic motor (25) is installed on one side of the positioning block (2). The telescopic motor (25) is arranged on the inner wall of the battery housing (1).

4. The adaptive power battery heat pipe cooling device according to claim 3, characterized in that: The telescopic centering rod (24) is of a telescopic structure.

5. The adaptive power battery heat pipe cooling device according to claim 1, characterized in that: A first adjusting tension spring (6) connected to both ends of the fixing column (21) is arranged in the horizontal sliding groove (22) of the positioning block (2). The first adjusting tension spring (6) has a tendency to squeeze the mounting block (23) towards the battery cell (10); A second adjusting tension spring (7) for controlling the displacement of the heat dissipation plate (3) is slidably sleeved on the fixing column (21).

6. The adaptive power battery heat pipe heat dissipation device according to claim 1, characterized in that: A separator (8) is further provided on the heat dissipation plate (3). The separator (8) includes a separation plate (80). A separation plate (80) is connected between the spaced positioning blocks (2) among several positioning blocks (2) on the same side inside the battery housing (1). An electric push rod (81) is connected to the separation plate (80), and the electric push rod (81) is horizontally distributed.

7. An adaptive power battery heat pipe cooling device according to claim 1, characterized in that: The heat pipe (5) includes a sealed housing (50), a first wick (51), a thermally deformable metal sheet (53), and a second wick (52). The sealed housing (50) is provided on the heat dissipation plate (3). The first wick (51) is provided on the inner wall of the sealed housing (50). The second wick (52) abuts against the first wick (51). A number of thermally deformable metal sheets (53) are equidistantly arranged on the inner wall of the sealed housing (50), and one end of the thermally deformable metal sheet (53) is connected to one side of the second wick (52).

8. An adaptive power battery heat pipe heat dissipation device according to claim 1, characterized in that: A number of heat spreaders (9) are further provided between the battery cells (10), and the heat spreaders (9) are in contact with the heat dissipation plate (3).

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