Charging pile thermal management system

Abstract

The present invention discloses a charging pile thermal management system device, which includes a thermal management unit, a charging pile module, an expansion water tank and a connecting conduit; wherein the thermal management unit includes a device housing, a compressor, a condenser, a blower, an expansion valve, a plate heat exchanger, a water pump, a heater and the like; the charging pile module includes a plurality of charging piles, a circulation main pipe, a circulation branch pipe, a water circuit solenoid valve and a branch pipe water temperature sensor. This device controls the coolant temperature to exchange heat inside the charging pile, which greatly improves the cooling rate of the charging pile, so that the charging pile has a very large improvement in temperature control stability, temperature difference, efficiency and other aspects. This device is provided with a separate thermal management unit and a charging pile module, and the two are connected through four docking interfaces. The thermal management unit can be installed at a position farther away from the charging pile module, thereby greatly increasing the optional installation positions of the thermal management unit and not occupying the charging pile installation space.

Description

Technical Field

[0001] The present invention belongs to the field of public charging of new energy vehicles, and specifically relates to a charging pile thermal management system. Background Art

[0002] With the development of the new energy vehicle market, there are more and more charging piles. The heat released by the charging piles during operation will affect their service life and may also cause burning and fire.

[0003] At present, in the field of public charging of new energy vehicles, there is no technology to manage the heat source of charging piles. Traditional charging piles release heat through air cooling and air heat exchange, which is inefficient. If a heat exchange system is directly added to the charging pile, it will not only occupy a large amount of charging pile installation space, but also be costly to install a heat exchange system for each charging pile. Summary of the invention

[0004] The purpose of the present invention is to solve the problems mentioned in the background technology and to provide a charging pile thermal management system which does not occupy the charging pile installation space and can enable multiple charging piles to share a thermal management unit.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] Charging pile thermal management system, including: a thermal management unit, a charging pile module, an expansion water tank, and a sixth conduit and a seventh conduit. The thermal management unit includes a device housing, a compressor, a first conduit, a condenser, a blower, a second conduit, an expansion valve, a plate heat exchanger, a third conduit, a heater, a water pump, and a fourth conduit and a fifth conduit; wherein the compressor, the condenser, the blower, the expansion valve, the plate heat exchanger, the heater, the water pump and each conduit are installed in the device housing. The compressor, the condenser, the expansion valve, the plate heat exchanger form a closed loop through the first conduit, the second conduit and the third conduit, and the closed loop has a refrigerant flowing in it, which is a refrigerant circulation system. The blower is installed near the condenser and is used to blow air to the condenser to promote heat exchange between the condenser and the outside air. The device housing is provided with a first interface and a second interface; the plate heat exchanger is connected to the first interface through the fourth conduit, and the plate heat exchanger is connected to the second interface through the fifth conduit. The charging pile module includes several charging piles, a circulation main pipe, a circulation branch pipe, a water circuit solenoid valve and a branch pipe water temperature sensor; the charging pile is connected to the circulation branch pipe, and both ends of the circulation branch pipe are connected to the circulation main pipe, and each circulation branch pipe is installed with a water circuit solenoid valve and a branch pipe water temperature sensor; one end of the circulation main pipe is provided with a third interface, and the other end is provided with a fourth interface. The first interface and the third interface are connected through the sixth conduit, and the second interface and the fourth interface are connected through the seventh conduit; the fourth conduit, the sixth conduit, the circulation main pipe, the circulation branch pipe, the seventh conduit and the fifth conduit form a closed loop, and a coolant circulates in the loop, which is a coolant circulation system.

[0007] To optimize the above technical solutions, the specific measures taken also include:

[0008] The above expansion valve is installed on the plate heat exchanger.

[0009] The second conduit is equipped with a pressure sensor and a first filling port; the pressure sensor is used to sense the refrigerant pressure in the conduit between the condenser and the expansion valve; the first filling port is used to fill the refrigerant and the manual service pressure monitoring port.

[0010] The third conduit is provided with a pressure sensor and a second filling port; the pressure sensor is used to sense the refrigerant pressure in the conduit between the compressor and the plate heat exchanger; the second filling port is used to fill the refrigerant and the manual service pressure monitoring port.

[0011] A heater and a water outlet temperature sensor are installed on the fourth conduit; the heater is used to heat the coolant; and the water outlet temperature sensor is used to sense the coolant temperature in the fourth conduit.

[0012] A water pump and a water inlet temperature sensor are installed on the fifth conduit; the water pump is used to provide fluid kinetic energy to the coolant; and the water inlet temperature sensor is used to sense the coolant temperature in the fifth conduit.

[0013] The seventh conduit is connected to an expansion water tank; the expansion water tank is provided with a filling port and a water level sensor; the filling port is used for filling coolant, and the water level sensor is used for monitoring the coolant liquid level inside the system.

[0014] The above-mentioned charging pile and thermal management unit are installed in parallel on a predetermined site.

[0015] Each of the above circulation branches is equipped with a water temperature sensor at both ends of the corresponding charging pile.

[0016] The above-mentioned thermal management unit also includes a controller system; the compressor, blower, heater, water pump, pressure sensor, outlet water temperature sensor, inlet water temperature sensor, water circuit solenoid valve and branch pipe water temperature sensor are all connected to the controller signal; the controller receives signals from the pressure sensor, outlet water temperature sensor, inlet water temperature sensor and branch pipe water temperature sensor, and can control the operation of the compressor, blower, heater, water pump and water circuit solenoid valve.

[0017] The branch pipe water temperature sensor, the outlet water temperature sensor and the inlet water temperature sensor mentioned above are all insertion-type temperature sensors.

[0018] The pressure sensor mentioned above is a thermistor pressure sensor.

[0019] The above-mentioned refrigerant is R134a or 407C.

[0020] The above-mentioned coolant is an ethylene glycol aqueous solution with a volume concentration of 50%.

[0021] The present invention has the following advantages:

[0022] 1. This device greatly improves the cooling rate of the charging pile by exchanging heat with a coolant inside the charging pile, making great improvements in temperature control stability, temperature difference, efficiency, etc. of the charging pile.

[0023] 2. This device sets up a separate thermal management unit and charging pile module, which are connected through four docking ports. The thermal management unit can be installed at a position farther away from the charging pile module, thereby greatly increasing the optional installation positions of the thermal management unit and not occupying the charging pile installation space.

[0024] 3. Through the setting of the circulation main pipe and circulation branch pipe, this device can make all charging piles share the same thermal management unit, which can effectively reduce the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Names marked in the figure: first conduit 1, device housing 11, first interface 11a, second interface 11b, compressor 12, condenser 13, blower 14, expansion valve 15, plate heat exchanger 16, heater 17, water pump 18, second conduit 2, charging pile 21, circulation main pipe 22, third interface 22a, fourth interface 22b, circulation branch pipe 23, water circuit solenoid valve 24, branch pipe water temperature sensor 25, fourth conduit 3, pressure sensor 31, pressure sensor 32, first filling port 33, second filling port 34, water outlet temperature sensor 35, water inlet temperature sensor 36, fourth conduit 4, fifth conduit 5, sixth conduit 6, seventh conduit 7, charging pile module 20, thermal management unit 30, expansion water tank 40. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0028] The charging pile thermal management system of this embodiment includes a thermal management unit 30, a charging pile module 20, and a sixth conduit 6 and a seventh conduit 7. The thermal management unit 30 includes a device housing 11, a compressor 12, a first conduit 1, a condenser 13, a blower 14, a second conduit 2, an expansion valve 15, a plate heat exchanger 16, a third conduit 3, a heater 17, a water pump 18, a fourth conduit 4, and a fifth conduit 5; wherein the compressor 12, the condenser 13, the blower 14, the expansion valve 15, the plate heat exchanger 16, the heater 17, the water pump 18, and each conduit are installed in the device housing 11. The compressor 12, the condenser 13, the expansion valve 15, the plate heat exchanger 16 form a closed loop through the first conduit 1, the second conduit 2, and the third conduit 3, and a refrigerant flows in the closed loop, which is a refrigerant circulation system. The blower 14 is installed near the condenser 13, and is used to blow air to the condenser 13 to promote heat exchange between the condenser 13 and the outside air. The device housing 11 is provided with a first interface 11a and a second interface 11b; the plate heat exchanger 16 is connected to the first interface 11a through the fourth conduit 4, and the plate heat exchanger 16 is connected to the second interface 11b through the fifth conduit 5. The charging pile module 20 includes a plurality of charging piles 21, a circulation main pipe 22, a circulation branch pipe 23, a water circuit solenoid valve 24, and a branch pipe water temperature sensor 25; the charging pile 21 is connected to the circulation branch pipe 23, and both ends of the circulation branch pipe 23 are connected to the circulation main pipe 22, and each circulation branch pipe 23 is installed with a water circuit solenoid valve 24 and a branch pipe water temperature sensor 25; one end of the circulation main pipe 22 is provided with a third interface 22a, and the other end is provided with a fourth interface 22b. The first interface 11a and the third interface 22a are connected through the sixth conduit 6, and the second interface 11b and the fourth interface 22b are connected through the seventh conduit 7; the fourth conduit 4, the sixth conduit 6, the circulation main pipe 22, the circulation branch pipe 23, the seventh conduit 7 and the fifth conduit 5 form a closed loop, and a coolant circulates in the loop, which is a coolant circulation system.

[0029] In the embodiment, the expansion valve 15 is installed on the plate heat exchanger 16;

[0030] In the embodiment, a pressure sensor 31 and a first filling port 33 are installed on the second conduit 2. The pressure sensor 31 is used to sense the refrigerant pressure in the conduit between the condenser 13 and the expansion valve 15; the first filling port 33 is used to fill the refrigerant and the manual service pressure monitoring port.

[0031] In the embodiment, a pressure sensor 32 and a second filling port 34 are installed on the third conduit 3. The pressure sensor 32 is used to sense the refrigerant pressure in the conduit between the compressor 12 and the plate heat exchanger 16; the second filling port 34 is used to fill the refrigerant and the manual service pressure monitoring port.

[0032] In the embodiment, a heater 17 and a water outlet temperature sensor 35 are installed on the fourth conduit 4 ; the heater 17 is used to heat the coolant; and the water outlet temperature sensor 35 is used to sense the coolant temperature in the fourth conduit 4 .

[0033] In the embodiment, a water pump 18 and a water inlet temperature sensor 36 are installed on the fifth conduit 5 ; the water pump 18 is used to provide fluid kinetic energy to the coolant; and the water inlet temperature sensor 36 is used to sense the coolant temperature in the fifth conduit 5 .

[0034] In the embodiment, the seventh conduit 7 is connected to an expansion water tank 40 ; the expansion water tank 40 is provided with a filling port and a water level sensor; the filling port is used for filling coolant, and the water level sensor is used for monitoring the coolant liquid level inside the system.

[0035] In the embodiment, the charging pile 21 and the thermal management unit 30 are installed in parallel on a predetermined site.

[0036] In the embodiment, each circulation branch pipe 23 is provided with a branch water temperature sensor 25 at both ends of the corresponding charging pile 21 .

[0037] In the embodiment, the thermal management unit 30 also includes a controller system, and the compressor 12, blower 14, heater 17, water pump 18, pressure sensor 31, pressure sensor 32, outlet water temperature sensor 35, inlet water temperature sensor 36, water circuit solenoid valve 24 and branch pipe water temperature sensor 25 are all connected to the controller signal; the controller receives signals from the pressure sensor 31, pressure sensor 32, outlet water temperature sensor 35, inlet water temperature sensor 36 and branch pipe water temperature sensor 25, and can control the operation of the compressor 12, blower 14, heater 17, water pump 18 and water circuit solenoid valve 24.

[0038] In the embodiment, the branch pipe water temperature sensor 25 , the outlet water temperature sensor 35 and the inlet water temperature sensor 36 are all plug-in temperature sensors.

[0039] In the embodiment, the pressure sensor 31 and the pressure sensor 32 are both thermistor pressure sensors.

[0040] In the embodiment, the refrigerant is R134a or 407C.

[0041] In the embodiment, the coolant is an ethylene glycol aqueous solution with a volume concentration of 50%.

[0042] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. Charging pile thermal management system, which is characterized by: The invention comprises a thermal management unit (30), a charging pile module (20), a sixth conduit (6), and a seventh conduit (7). The thermal management unit (30) comprises a device housing (11), a compressor (12), a first conduit (1), a condenser (13), a blower (14), a second conduit (2), an expansion valve (15), a plate heat exchanger (16), a third conduit (3), a heater (17), a water pump (18), a fourth conduit (4), and a fifth conduit (5); wherein the compressor (12), the condenser (13), the blower (14), the expansion valve (15), the plate heat exchanger (16), The heater (17), the water pump (18) and each conduit are installed in the device housing (11). The compressor (12), the condenser (13), the expansion valve (15) and the plate heat exchanger (16) form a closed loop through the first conduit (1), the second conduit (2) and the third conduit (3). Refrigerant flows in the closed loop, which is a refrigerant circulation system. The blower (14) is installed near the condenser (13) and is used to blow air to the condenser (13) to promote heat exchange between the condenser (13) and the outside air. The device housing (11) is provided with a first interface (11a) and a second interface (11b). The plate heat exchanger (16) is connected to the first interface (11a) through the fourth conduit (4), and the plate heat exchanger (16) is connected to the second interface (11b) through the fifth conduit (5). The charging pile module (20) includes a plurality of charging piles (21), a circulation main pipe (22), a circulation branch pipe (23), a water circuit solenoid valve (24) and a branch pipe water temperature sensor (25). The charging pile (21) is connected to the circulation branch pipe (23), and both ends of the circulation branch pipe (23) are connected to the circulation main pipe (22). Each circulation branch pipe (23) is equipped with a water circuit solenoid valve (24). 24) and a branch pipe water temperature sensor (25); one end of the circulation main pipe (22) is provided with a third interface (22a), and the other end is provided with a fourth interface (22b), the first interface (11a) and the third interface (22a) are connected through a sixth conduit (6), and the second interface (11b) and the fourth interface (22b) are connected through a seventh conduit (7); the fourth conduit (4), the sixth conduit (6), the circulation main pipe (22), the circulation branch pipe (23), the seventh conduit (7) and the fifth conduit (5) form a closed loop, and a coolant circulates in the loop, which is a coolant circulation system; The expansion valve (15) is installed on the plate heat exchanger (16); The second conduit (2) is provided with a pressure sensor (31) and a first filling port (33), wherein the pressure sensor (31) is used to sense the refrigerant pressure in the conduit between the condenser (13) and the expansion valve (15); the first filling port (33) is used to fill the refrigerant and the manual service pressure monitoring port into the conduit; The third conduit (3) is provided with a pressure sensor (32) and a second filling port (34), wherein the pressure sensor (32) is used to sense the refrigerant pressure in the conduit between the compressor (12) and the plate heat exchanger (16); the second filling port (34) is used to fill the refrigerant and the manual service pressure monitoring port into the conduit; A heater (17) and a water outlet temperature sensor (35) are installed on the fourth conduit (4); the heater (17) is used to heat the coolant; and the water outlet temperature sensor (35) is used to sense the coolant temperature in the fourth conduit (4).

2. The charging pile thermal management system according to claim 1 is characterized in that: A water pump (18) and a water inlet temperature sensor (36) are installed on the fifth conduit (5); the water pump (18) is used to provide fluid kinetic energy to the coolant; and the water inlet temperature sensor (36) is used to sense the coolant temperature in the fifth conduit (5).

3. The charging pile thermal management system according to claim 2 is characterized in that: The seventh conduit (7) is connected to an expansion water tank (40); the expansion water tank (40) is provided with a filling port and a water level sensor; the filling port is used for filling coolant, and the water level sensor is used for monitoring the coolant liquid level inside the system.

4. The charging pile thermal management system according to claim 3 is characterized in that: The charging pile (21) and the thermal management unit (30) are installed in parallel on a predetermined site; each circulation branch pipe (23) is equipped with a branch pipe water temperature sensor (25) at both ends of the corresponding charging pile (21).

5. The charging pile thermal management system according to claim 4 is characterized in that: The thermal management unit (30) further comprises a controller system, wherein the compressor (12), the blower (14), the heater (17), the water pump (18), the pressure sensor (31), the pressure sensor (32), the outlet water temperature sensor (35), the inlet water temperature sensor (36), the water circuit solenoid valve (24) and the branch pipe water temperature sensor (25) are all connected to the controller signal; the controller receives signals from the pressure sensor (31), the pressure sensor (32), the outlet water temperature sensor (35), the inlet water temperature sensor (36) and the branch pipe water temperature sensor (25), and can control the operation of the compressor (12), the blower (14), the heater (17), the water pump (18) and the water circuit solenoid valve (24).

6. The charging pile thermal management system according to claim 5 is characterized in that: The branch pipe water temperature sensor (25), the water outlet temperature sensor (35) and the water inlet temperature sensor (36) are all plug-in temperature sensors; the pressure sensor (31) and the pressure sensor (32) are both thermistor pressure sensors; the refrigerant is R134a or 407C; the coolant is an ethylene glycol aqueous solution with a volume concentration of 50%.

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