阅读说明：本技术 一种基于液冷技术的汽车充电桩散热系统 (Car fills electric pile cooling system based on liquid cooling technique ) 是由 张喆 程建杰 王跃 王瑜 朱锡冬 姜泳昊 于 2019-10-16 设计创作，主要内容包括：本发明所述的一种基于液冷散热技术的汽车充电桩散热系统,其特征在于液冷板安装在功率模块与充电桩外壳之间。工作时,被土壤冷却的流体流入液冷板,与充电桩内部空气进行自然对流换热,被液冷板冷却的空气与充电功率模块进行自然对流换热,将冷量传导给充电桩的功率模块,降低功率模块的工作温度。工质流出充电桩后,由接头汇集流入导流管,经导流管流入地底土壤,与土壤进行热量交换,冷却后的流体经导流管流入水泵,在水泵的驱动下经导流管分散至各排管道,实现自然对流换热,将热量连续不断的带出充电桩。本发明以土壤作为冷源,依靠液冷板实现与充电功率元件的热量交换,实现高效稳定的散热,有效解决充电桩内部热量聚集无法散发的问题。(The invention relates to an automobile charging pile heat dissipation system based on a liquid cooling heat dissipation technology. During operation, the fluid cooled by soil flows into the liquid cooling plate, natural heat convection is carried out with the inside air of charging pile, natural heat convection is carried out with the power module that charges by the air of liquid cooling plate refrigerated, conducts cold volume for the power module who fills electric pile, reduces the operating temperature of power module. After the working medium flows out of the charging pile, the working medium flows into the guide pipe through the connector, flows into the soil at the bottom of the ground through the guide pipe, exchanges heat with the soil, flows into the water pump through the guide pipe after being cooled, is dispersed to each row of pipelines through the guide pipe under the driving of the water pump, realizes natural convection heat exchange, and continuously takes the heat out of the charging pile. According to the invention, soil is used as a cold source, heat exchange with the charging power element is realized by means of the liquid cooling plate, efficient and stable heat dissipation is realized, and the problem that heat in the charging pile is accumulated and cannot be dissipated is effectively solved.)

1.A liquid cooling technology-based automobile charging pile heat dissipation system,the power module comprises a first power module (1), a second power module (2), a third power module (3) and a fourth power moduleThe device comprises a block (4), a charging pile shell (5), a liquid cooling plate (6), a connecting joint (7), a first guide pipe (8), a cold source (9), a second guide pipe (10), a water pump (11), a third guide pipe (12), a connecting joint (13), a first metal plate (18), a second metal plate (19), a heat exchange pipeline (20), a first side fan (14), a second side fan (15), a third side fan (16) and a fourth side fan (17); the liquid cooling plate (6) is arranged between the first power module (1), the second power module (2), the third power module (3) and the fourth power module (4) and the charging pile shell (5), the distance between the liquid cooling plate (6) and the charging pile shell (5) is 10-20 mm, and the height between the liquid cooling plate (6) and the top of the charging pile is 30-50 mm; the multiple rows of heat exchange pipelines (20) are arranged among the first power module (1), the second power module (2), the third power module (3), the fourth power module (4) and the charging pile shell (5) in a 3-4-layer mode and are fixed by a first metal plate (18) and a second metal plate (19); the pipe diameter of each heat exchange pipeline (20) is 6-8 mm, and the distance between each row of heat exchange pipelines (18) is 4-5 mm; a first side fan (14), a second side fan (15), a third side fan (16) and a fourth side fan (17) are arranged on the charging pile shell (5), the height of the first side fan (14) is 55cm from the bottom of the charging pile and 25cm from the left side, the second side fan (15) is positioned right above the first side fan (14) and 1cm from the first side fan, the third side fan (17) is positioned on the left side of the second side fan (16) at a distance of 1cm, and the fourth side fan (18) is positioned right below the third side fan (17) at a distance of 1 cm;

the liquid cooling plate (6) is composed of a first metal plate (18), a second metal plate (19) and a heat exchange pipeline (20), and the heat exchange pipeline (20) is fixed by the first metal plate (18) and the second metal plate (19); heat transfer pipeline (20) divide into a plurality of rows, behind every row of pipeline outflow charging pile, link to each other with first honeycomb duct (8) through attach fitting (7), cold source (9) flow in first honeycomb duct (8), flow out behind cold source (9) and link to each other with second honeycomb duct (10), the entry of water pump (11) is connected in second honeycomb duct (10), third honeycomb duct (12) are connected in the exit linkage of water pump (11), the entry of each row of heat transfer pipeline (20) is connected through connecting (13) in third honeycomb duct (12).

2.The liquid-based refrigeration technology of claim 1The heat dissipation system of the automobile charging pile is provided,the method is characterized in that:

air flows into the charging pile under the action of the first side fan (14), the second side fan (15), the third side fan (16) and the fourth side fan (17), the power module conducts heat to the air, and the temperature of the air in the charging pile is increased; working medium flows through heat dissipation pipeline (20), carry out the heat transfer with the air that fills electric pile shell (5) inside temperature rise, reduce the air temperature, the heat transfer medium outflow that the temperature rises fills electric pile back, concentrate through attach fitting (7), then flow in first honeycomb duct (8), flow in cold source (9) through first honeycomb duct (8), arrange the heat in the soil, reduce working medium's temperature, accomplish the heat exchange back with cold source (9), by second honeycomb duct (10) inflow water pump (11), under the effect of water pump (11), get into third honeycomb duct (12), then disperse each calandria way to heat transfer pipeline (20) through attach fitting (13), form closed circuit.

3.The liquid cooling technology-based vehicle charging post heat dissipation system as recited in claim 1,the method is characterized in that:

the height of the liquid cooling plate (6) is not higher than the highest point of the power module (1) and is not lower than the lowest point of the power module (4); and all rows of the heat exchange pipelines (20) are arranged in parallel and are serpentine pipelines.

4. The cooling system scheme of claim 1, wherein the cooling system scheme comprises:

working media in the connecting joint (7), the first flow guide pipe (8), the second flow guide pipe (10), the water pump (11), the third flow guide pipe (12), the connecting joint (13) and the heat exchange pipeline (20) are ethylene glycol aqueous solution or other liquid with high heat conductivity and low electric conductivity.

5.The liquid cooling technology-based vehicle charging post heat dissipation system as recited in claim 1,the method is characterized in that:

the cold source (9) is a soil cold source, and the pipe of the first flow guide pipe (10) is made of a material with certain corrosion resistance.

6.The liquid cooling technology-based vehicle charging post heat dissipation system as recited in claim 1,the method is characterized in that:

the working medium is air between the first power module (1), the second power module (2), the third power module (3) and the fourth power module (4) and the liquid cooling plate (6).

Technical Field

The invention relates to a liquid cooling technology-based automobile charging pile heat dissipation system.

Background

Along with the development and the application of novel energy, pure electric vehicles's market status constantly promotes, also increases rapidly as supporting electric pile figure of filling. At the end of 2015, the number of the automobile charging piles put into use in China is 3.5 thousands, and by 2019, 9 months, the number of the automobile charging piles put into use in China including private charging piles reaches 108 thousands. At present, most of the electric piles which are generally put into use are direct-current electric piles, and the electric pile has the characteristics of large power, wide output voltage and current range and short-time quick charging. In the quick charging process, the direct current charging pile is in a high-power and uninterrupted working state for a long time. Receive to fill electric pile inner space restriction, it can make the heat gather fast in filling electric pile to charge, makes the temperature of pile body constantly rise, influences the stable use of inside components and parts. In recent years, the emergence of car charging station's conflagration occasionally, for the steady operation of guarantee car charging pile, improve equipment's fail safe nature, car charging pile's heat dissipation design is imperative.

At present, an air-cooled heat dissipation system is mainly adopted in the automobile charging pile in China, a side fan is installed to drive air to flow, and forced convection heat exchange is carried out between the air and a power module; meanwhile, the air duct extending inside the charging pile is long, and cold air contacted by the downstream power module is heated by the upstream power module, so that heat inside the charging pile cannot be discharged out of the charging pile. When the air cooling system normally works, the highest temperature inside the charging pile reaches 79 ℃, and is higher than the working temperature specified by the national standard. According to the invention, soil is used as a cold source, a factor that the internal space of the charging pile is smaller is considered, a heat dissipation cold plate is arranged between the power element near the direct current bus inlet and outlet and the charging pile shell, heat exchange with air inside the charging is realized by arranging a plurality of rows of heat exchange pipelines, heat exchange is carried out between the air cooled by the liquid cooling plate and the charging power element, the temperature of a working module is reduced, efficient and stable heat dissipation is realized, and the problem that the heat inside the charging pile can not be dissipated due to the fact that the air flow is blocked is effectively solved.

Disclosure of Invention

A liquid cooling technology-based automobile charging pile heat dissipation system comprises a first power module (1), a second power module (2), a third power module (3), a fourth power module (4), a charging pile shell (5), a heat dissipation cold plate (6), a connector (7), a first guide pipe (8), a cold source (9), a second guide pipe (10), a water pump (11), a third guide pipe (12), a connector (13), a first metal plate (18), a second metal plate (19), a heat exchange pipeline (20), a first side fan (14), a second side fan (15), a third side fan (16) and a fourth side fan (17); the heat dissipation cold plate (6) is arranged between the first power module (1), the second power module (2), the third power module (3) and the fourth power module (4) and the charging pile shell (5), the distance between the heat dissipation cold plate (6) and the charging pile shell (5) is 10-20 mm, and the height between the heat dissipation cold plate and the charging pile shell is 30-50 mm; the multiple rows of heat exchange pipelines (20) are arranged among the first power module (1), the second power module (2), the third power module (3), the fourth power module (4) and the charging pile shell (5) in a 3-4-layer mode and are fixed by a first metal plate (18) and a second metal plate (19); the pipe diameter of each heat exchange pipeline (20) is 6-8 mm, and the distance between each row of heat exchange pipelines (18) is 4-5 mm; a first side fan (14), a second side fan (15), a third side fan (16) and a fourth side fan (17) are arranged on the charging pile shell (5), the height of the first side fan (14) is 55cm from the bottom of the charging pile and 25cm from the left side, the second side fan (15) is positioned right above the first side fan (14) and 1cm from the first side fan, the third side fan (17) is positioned on the left side of the second side fan (16) at a distance of 1cm, and the fourth side fan (18) is positioned right below the third side fan (17) at a distance of 1 cm;

the heat dissipation cold plate (6) is composed of a first metal plate (18), a second metal plate (19) and a heat exchange pipeline (20), and the heat exchange pipeline (20) is fixed by the first metal plate (18) and the second metal plate (19); heat transfer pipeline (20) divide into a plurality of rows, behind every row of pipeline outflow charging pile, link to each other with first honeycomb duct (8) through attach fitting (7), cold source (9) flow in first honeycomb duct (8), flow out behind cold source (9) and link to each other with second honeycomb duct (10), the entry of water pump (11) is connected in second honeycomb duct (10), third honeycomb duct (12) are connected in the exit linkage of water pump (11), the entry of each row of heat transfer pipeline (20) is connected through connecting (13) in third honeycomb duct (12).

Air flows into the charging pile under the action of the first side fan (14), the second side fan (15), the third side fan (16) and the fourth side fan (17), the power module conducts heat to the air, and the temperature of the air in the charging pile is increased; working medium flows through heat dissipation pipeline (20), carry out the heat transfer with the air that fills electric pile shell (5) inside temperature rise, reduce the air temperature, the heat transfer medium outflow that the temperature rises fills electric pile back, concentrate through attach fitting (7), then flow in first honeycomb duct (8), flow in cold source (9) through first honeycomb duct (8), arrange the heat in the soil, reduce working medium's temperature, accomplish the heat exchange back with cold source (9), by second honeycomb duct (10) inflow water pump (11), under the effect of water pump (11), get into third honeycomb duct (12), then disperse each calandria way to heat transfer pipeline (20) through attach fitting (13), form closed circuit.

The height of the heat dissipation cold plate (6) is not higher than the highest point of the power module (1) and is not lower than the lowest point of the power module (4); and all rows of the heat exchange pipelines (20) are arranged in parallel and are serpentine pipelines.

Working media in the connecting joint (7), the first flow guide pipe (8), the second flow guide pipe (10), the water pump (11), the third flow guide pipe (12), the connecting joint (13) and the heat exchange pipeline (20) are ethylene glycol aqueous solution or other liquid with high heat conductivity and low electric conductivity.

The cold source (9) is a soil cold source, and the pipe of the first flow guide pipe (10) is made of a material with certain corrosion resistance.

The working medium is air between the first power module (1), the second power module (2), the third power module (3), the fourth power module (4) and the heat dissipation cold plate (6).

Description of the drawings:

FIG. 1 is a schematic structural diagram of a liquid cooling technology-based automobile charging pile heat dissipation system;

the names of the reference numbers in fig. 1 are: 1. a first power module; 2. a second power module; 3. a third power module; 4. a fourth power module; 5. a charging pile housing; 6. a heat dissipation cold plate; 7. connecting a joint; 8. a first draft tube; 9. a cold source; 10. a second draft tube; 11. a water pump; 12. a third draft tube; 13. connecting a joint; 14. a first side fan; 15. a second side fan; 16. a third side fan; 17. and a fourth side fan.

Fig. 2 is a detailed structural view of the heat-dissipating cold plate 6.

The reference numbers in fig. 2 are: 18. a first metal plate; 19. a second metal plate; 20 heat dissipation pipes.

The specific implementation scheme is as follows:

the cooling system for an automobile charging pile based on cold plate cooling according to the present invention is further described with reference to the accompanying drawings and the specific embodiments.

As shown in fig. 1, the heat dissipation system for an automobile charging pile based on a liquid cooling technology mainly includes: 1. a first power module; 2. a second power module; 3. a third power module; 4. a fourth power module; 5. a charging pile housing; 6. a heat dissipation cold plate; 7. connecting a joint; 8. a first draft tube; 9. a cold source; 10. a second draft tube; 11. a water pump; 12. a third draft tube; 13. connecting a joint; 14. a first side fan; 15. a second side fan; 16. a third side fan; 17. and a fourth side fan. As shown in fig. 2, the heat-dissipating cold plate 6 mainly includes: 18. a first metal plate; 19. a second metal plate; 20 heat dissipation pipes.

The cooling plate comprises a cooling pipeline, a first metal plate and a second metal plate, the distance between the cooling plate and the top of the charging pile is 50-100 mm, the cooling plate is arranged between the first power module, the second power module, the third power module, the fourth power module and the charging pile shell, and fluid exchanges heat with air heated by a power element through the cooling plate. The working medium flows through the heat radiation pipeline 20, the connecting joint 7, the first flow guide pipe 8, the cold source 9, the second flow guide pipe 10, the pump 11, the third flow guide pipe 12 and the connecting joint 13 in sequence, and finally flows back to the heat radiation pipeline 20 to form a closed heat output loop. The working medium in the heat dissipation pipeline 20, the connecting joint 7, the first flow guide pipe 8, the second flow guide pipe 10, the water pump 11, the third flow guide pipe 12 and the connecting joint 13 is glycol aqueous solution or other liquid with high thermal conductivity and low electrical conductivity. Every row of heat dissipation pipeline 20 is snakelike pipeline, and the row number is 3 ~ 4 rows, and the concrete power that fills electric pile by the difference is confirmed, makes the cold volume that the liquid cooling board passed to the air satisfy the heat dissipation demand that the car filled electric pile, provides stable operating condition for filling electric pile.

The working principle of the invention is as follows: when the charging pile works, air flows into the charging pile under the action of the first side fan 14, the second side fan 15, the third side fan 16 and the fourth side fan 17, the first power module 1, the second power module 2, the point power module 3 and the fourth power module 4 conduct heat to the air in the charging pile, and the temperature of the air in the charging pile is increased; the low-temperature fluid cooled by the soil flows into the liquid cooling plate 6 to perform natural heat convection with the air inside the charging pile, the air cooled by the liquid cooling plate 6 performs natural heat convection with the air inside the charging pile, the cold energy is conducted to the air inside the charging pile, and the cooled air transmits the cold energy to the first charging power module 1, the second power module 2, the third power module 3 and the fourth power module 4 to reduce the working temperature of the power modules. After the heat transfer medium that the temperature rose flows out and fills electric pile, concentrate through attach fitting 7, then flow in first honeycomb duct 8, flow in cold source 9 through first honeycomb duct 8, arrange the heat in soil, reduce working medium's temperature, accomplish the heat exchange with cold source (9), flow in water pump 11 by second honeycomb duct 10, disperse to each calandria way of heat transfer pipeline 20 through third honeycomb duct 12 and attach fitting 13 under the drive of water pump 11, realize the natural convection heat transfer, with the continuous area play electric pile that fills of heat.

According to the invention, soil is used as a cold source, heat exchange with the charging power element is realized by installing a plurality of rows of heat exchange pipelines, heat exchange with the charging power element is realized by relying on the liquid cooling plate, efficient and stable heat dissipation is realized, and the problem that heat in the charging pile can not be dissipated due to accumulation is effectively solved.