Liquid cooling device for charging pile

Abstract

The utility model relates to a liquid cooling device for a charging pile, which belongs to the technical field of liquid cooling of the charging pile, and comprises a bottom plate, a radiator is fixedly arranged on the bottom plate, a fan cover is fixedly arranged on the rear side of the radiator in a covering manner, and the rear side of the fan cover is connected with a cooling fan, and the liquid cooling device is characterized in that an oil cooling assembly is arranged on the radiator; the oil cooling assembly comprises an oil tank, an oil pump and cooling liquid are arranged in the oil tank, the oil pump is immersed in the cooling liquid, an oil inlet of the oil tank is connected with an output port of the radiator, and an input port of the radiator is connected with a liquid separator. The oil pump is integrally arranged in the oil tank, so that the oil pump is immersed in the cooling liquid of the oil tank, the structure is simplified, the problems of dry friction and friction heat generation caused by oil shortage of the oil pump are solved, and the service life of the oil pump is greatly prolonged; the oil pump resonates with the cooling liquid in the oil tank, so that noise generated in the starting process of the oil pump can be reduced.

Description

Technical Field

[0001] The utility model relates to a liquid cooling device for a charging pile, belonging to the technical field of liquid cooling of charging piles. Background Technique

[0002] With the continuous maturity of new energy vehicle technology and the increasing recognition of environmental protection concepts by consumers, the ownership of electric vehicles continues to increase and the battery energy density continues to improve. This directly promotes the rapid growth of charging demand, especially for efficient and convenient charging methods. The range anxiety and charging anxiety of electric vehicles have made the construction of ultra-fast charging stations inevitable. Ultra-fast charging stations can provide higher charging power and faster charging speed to meet the emergency charging needs of consumers.

[0003] However, when users complete charging operations with a super charging gun, the relatively high charging voltage causes a large current in the power line. The resulting current thermal effect will cause the charging gun cable to heat up sharply. The higher the temperature, the greater the copper core resistance, and then the higher the temperature, resulting in a vicious cycle. This will lead to a decrease in charging efficiency, damage to charging equipment, and even safety accidents. To reduce the temperature of the charging cable, a liquid cooling device is required for fast charging piles to cool the cable. The liquid cooling ultra-fast charging technology uses a special coolant to circulate and exchange heat between the cable and the charging gun, reducing the heat generated during charging and improving charging efficiency and safety.

[0004] The Chinese utility model patent with the publication number CN216101584U discloses a heat dissipation structure for the gun line of a high-power charging pile, including a cooling fan. A fixed bracket is arranged outside the cooling fan, and an oil-cooled radiator is arranged on the fixed bracket. The two ends of the oil-cooled radiator are respectively provided with an oil-cooled radiator inlet and an oil-cooled radiator outlet. The oil-cooled radiator outlet is connected to an expansion tank, the expansion tank is connected to an oil pump, the oil pump is connected to a heat conduction pipeline a, the pipeline a is connected to a heat conduction pipeline b, and the pipeline b is connected to the oil-cooled radiator inlet. The heat dissipation structure for the gun line of the high-power charging pile of the utility model reduces the high temperature generated during the charging process of the vehicle charging pile and solves the problem of poor heat dissipation capacity of the cooling system in the existing charging pile. However, in the prior art, the oil pump and the fuel tank (expansion tank) are separately distributed. After long-term operation, the oil pump is prone to dry friction and heat generation due to lack of oil inside, which greatly reduces the service life of the gear oil pump. Moreover, there is also a relatively large noise during the startup process of the oil pump.

[0005] Therefore, there is a need for a liquid cooling device for a charging pile to extend the service life of the oil pump and reduce noise. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is: to provide a liquid cooling device for a charging pile that can extend the service life of the oil pump and reduce noise in order to overcome the deficiencies of the prior art.

[0007] The technical solution adopted by the utility model to solve the above problems is: a liquid cooling device for a charging pile, comprising a bottom plate, a radiator is fixedly arranged on the bottom plate, a rear fixed cover of the radiator is provided with a wind shield, and a cooling fan is connected to the rear side of the wind shield, characterized in that: an oil cooling component is arranged on the radiator;

[0008] The oil cooling assembly comprises an oil tank, in which an oil pump and coolant are arranged, the oil pump is immersed in the coolant, the oil inlet of the oil tank is connected to the output port of the radiator, and the input port of the radiator is connected to a liquid distributor.

[0009] Preferably, the liquid dispenser is connected to a temperature sensor and a pressure sensor.

[0010] Preferably, a liquid level sensor and a vent valve are provided on the top of the oil tank.

[0011] Preferably, the coolant is dimethyl silicone oil.

[0012] Preferably, a sight glass is provided on one side of the oil tank.

[0013] Preferably, the cooling fan is a brushless automotive electronic fan.

[0014] Preferably, the oil pump is a gear pump.

[0015] Preferably, the oil inlet of the oil tank is connected to the output port of the radiator through an oil pipe.

[0016] Preferably, the radiator comprises an input pipe, an output pipe and a plurality of heat-conducting pipes, the output pipe and the input pipe are distributed on the left and right, the input port and the output port of the radiator are respectively arranged on the input pipe and the output pipe, the plurality of heat-conducting pipes are distributed between the input pipe and the output pipe at intervals from top to bottom, and the input pipe and the output pipe are connected through the heat-conducting pipe.

[0017] Preferably, the heat conducting pipe is plate-shaped and arranged horizontally.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] 1. The oil pump is integrated into the oil tank, so that the oil pump is immersed in the coolant in the oil tank, which simplifies the structure and avoids the problem of dry friction and frictional heat caused by lack of oil in the oil pump, greatly improving the service life of the oil pump;

[0020] 2. The oil pump can also reduce the noise generated during the oil pump startup process by resonating with the coolant in the oil tank;

[0021] 3. The use of a liquid distributor to connect the radiator greatly reduces the number of pipe connections, effectively reduces the risk of leakage, and also facilitates the client's installation. Description of the Drawings

[0022] Figure 1 A perspective view of a liquid cooling device for a charging pile according to the present utility model;

[0023] Figure 2 A front view of a liquid cooling device for a charging pile according to the present utility model;

[0024] Figure 3 A left view of a liquid cooling device for a charging pile according to the present utility model;

[0025] Figure 4 A top view of a liquid cooling device for a charging pile according to the present utility model;

[0026] Figure 5 A schematic structural view of an oil cooling assembly;

[0027] Figure 6 A schematic structural view of a radiator;

[0028] Figure 7 A working principle diagram of a liquid cooling device for a charging pile according to the present utility model.

[0029] Wherein:

[0030] A bottom plate 1, a radiator 2, a wind cover 3, a cooling fan 4, and an oil cooling assembly 5;

[0031] An input pipe 21, an output pipe 22, and a heat conduction pipe 23;

[0032] An oil tank 51, an oil pump 52, an oil pipe 53, a liquid distributor 54, a temperature sensor 55, a pressure sensor 56, a sight glass pipe 57, a liquid level sensor 58, and a vent valve 59. Detailed Embodiments

[0033] As Figure 1-7 shown, a liquid cooling device for a charging pile in this embodiment includes a bottom plate 1, the bottom plate 1 is fixedly provided with a radiator 2, a wind cover 3 is fixedly covered at the rear side of the radiator 2, a cooling fan 4 is connected to the rear side of the wind cover 3, and an oil cooling assembly 5 is provided on the radiator 2;

[0034] The oil cooling assembly 5 includes an oil tank 51, in which an oil pump 52 and a coolant are provided. The oil pump 52 is immersed in the coolant, which is dimethyl silicone oil. The inlet of the oil tank 51 is connected to the outlet of the radiator 2 through a pipeline 53. The inlet of the radiator 2 is connected with a liquid distributor 54, and a temperature sensor 55 and a pressure sensor 56 are connected to the liquid distributor 54. The temperature sensor 55 and the pressure sensor 56 are used to detect the circulating temperature and pressure of the coolant to ensure the stable operation of the system. A sight glass tube 57 is provided on one side of the oil tank 51, and a liquid level sensor 58 and a vent valve 59 are provided on the top of the oil tank 51;

[0035] During operation, the outlet of the oil tank 51 is connected to a cooling circulation channel specially made for the charging gun. Among them, the high-temperature copper core of the charging gun is located in the cooling circulation channel, and the cooling circulation channel is connected to the return liquid port of the liquid distributor. There are two return liquid ports of the liquid distributor. When the oil pump 52 is started, the oil pump 52 drives the coolant into the cooling circulation channel. The coolant absorbs the heat generated by the high-temperature copper core to realize the heat dissipation of the charging pile, so as to achieve the purpose of safe and efficient charging and extend the service life of the charging equipment. Subsequently, the coolant enters the radiator 2 from the liquid distributor, and the coolant in the radiator 2 then flows back into the oil tank 51 through the pipeline 53. At the same time, the cooling fan 4 is started. Under the forced convection effect of the fan, the high-temperature coolant exchanges heat with the air to realize the cooling of the coolant, and so on in a cycle;

[0036] Here, the coolant directly contacts the copper core for heat exchange, greatly improving the heat exchange efficiency. The oil pump 52 is integrally designed in the oil tank 51, so that the oil pump 52 is immersed in the coolant of the oil tank 51, which simplifies the structure. At the same time, it avoids the problems of dry friction and heat generation due to lack of oil of the oil pump 52, greatly improving the service life of the oil pump 52. Moreover, by resonating with the coolant in the oil tank 51, the noise generated during the startup process of the oil pump 52 can also be reduced. In addition, the liquid distributor 54 is connected to the radiator 2, greatly reducing the pipeline connection, effectively reducing the leakage risk, and also facilitating the installation of the client;

[0037] The designed capacity of the oil tank 51 is 1.5L, which can meet the requirements of the thermal expansion and contraction of the coolant during use;

[0038] In addition, a liquid level sensor 58 and a vent valve 59 are provided on the oil tank 51, and a controller is provided on the bottom plate 1. The controller is electrically connected to the liquid level sensor 58. When the liquid level is lower than 10%, the controller sends out an alarm signal to prompt that liquid needs to be replenished to avoid the idling of the oil pump 52 caused by lack of liquid and the inability of the charging gun to dissipate heat. The vent valve 59 ensures smooth emptying during liquid addition and operation;

[0039] The radiator 2 comprises an input pipe 21, an output pipe 22 and a plurality of heat-conducting pipes 23, wherein the output pipe 22 and the input pipe 21 are distributed on the left and right, the input port and the output port of the radiator 2 are respectively arranged on the input pipe 21 and the output pipe 22, and the plurality of heat-conducting pipes 23 are distributed between the input pipe 21 and the output pipe 22 from top to bottom at intervals, the heat-conducting pipes 23 are plate-shaped, and the heat-conducting pipes 23 are arranged horizontally, and the input pipe 21 and the output pipe 22 are connected through the heat-conducting pipes 23;

[0040] The coolant is transported from the input port to the input pipe 21, the coolant in the input pipe 21 is transported from the heat conducting pipe 23 to the output pipe 22, and the coolant in the output pipe 22 is transported from the output port and the oil pipe 53 to the oil tank 51 in sequence;

[0041] The cooling fan 4 is a brushless vehicle electronic fan;

[0042] The oil pump 52 is a gear pump, and during operation, the gears are immersed in the coolant;

[0043] Among them, the liquid cooling device for super charging pile has the following modes during operation:

[0044] 1. Cooling mode: The cooling fan 4 and the oil pump 52 are started to dissipate heat, ensuring that the coolant temperature in the charging gun is lower than 70°C. At the same time, the speeds of the cooling fan 4 and the oil pump 52 are adjusted synchronously according to the temperature feedback to reduce the power consumption of the whole machine.

[0045] 2. Self-circulation mode: the cooling fan 4 is turned off and the oil pump 52 is started. At this time, the oil pump 52 runs at a relatively low power. When the charging load is relatively small, the gun line temperature is ensured in the most energy-saving way;

[0046] 3. Stop mode: all components stop working;

[0047] 4. Fault mode: All components stop working and the charging pile cannot perform charging operations. After the fault is eliminated, this mode is released and normal operation is restored;

[0048] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A liquid cooling device for a charging pile, comprising a base plate (1), a radiator (2) being fixedly arranged on the base plate (1), a wind shield (3) being fixedly arranged on the rear side of the radiator (2), a cooling fan (4) being connected to the rear side of the wind shield (3), characterized in that: The radiator (2) is provided with an oil cooling assembly (5); The oil cooling assembly (5) comprises an oil tank (51), an oil pump (52) and a coolant are arranged in the oil tank (51), the oil pump (52) is immersed in the coolant, the oil inlet of the oil tank (51) is connected to the output port of the radiator (2), and the input port of the radiator (2) is connected to a liquid distributor (54).

2. A liquid cooling device for a charging pile according to claim 1, characterized in that: The liquid distributor (54) is connected to a temperature sensor (55) and a pressure sensor (56).

3. The liquid cooling device for a charging pile according to claim 1, characterized in that: A liquid level sensor (58) and a vent valve (59) are provided on the top of the oil tank (51).

4. The liquid cooling device for a charging pile according to claim 1, characterized in that: The cooling liquid is dimethyl silicone oil.

5. The liquid cooling device for a charging pile according to claim 1, characterized in that: A sight glass (57) is provided on one side of the oil tank (51).

6. A liquid cooling device for a charging pile according to claim 1, characterized in that: The cooling fan (4) is a brushless vehicle electronic fan.

7. The liquid cooling device for a charging pile according to claim 1, characterized in that: The oil pump (52) is a gear pump.

8. The liquid cooling device for a charging pile according to claim 1, characterized in that: The oil inlet of the oil tank (51) is connected to the oil outlet of the radiator (2) via an oil pipe (53).

9. The liquid cooling device for a charging pile according to claim 1, characterized in that: The radiator (2) comprises an input pipe (21), an output pipe (22) and a plurality of heat-conducting pipes (23); the output pipe (22) and the input pipe (21) are distributed on the left and right; the input port and the output port of the radiator (2) are respectively arranged on the input pipe (21) and the output pipe (22); the plurality of heat-conducting pipes (23) are distributed between the input pipe (21) and the output pipe (22) at intervals from top to bottom; and the input pipe (21) and the output pipe (22) are connected via the heat-conducting pipe (23).

10. A liquid cooling device for a charging pile according to claim 9, characterized in that: The heat conducting pipe (23) is plate-shaped and arranged horizontally.

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