Passenger car battery and motor cooling system

Abstract

The utility model discloses a passenger car battery and motor heat dissipation system which comprises an air conditioning system which is arranged on the roof of a passenger car, provides refrigeration gas for the interior of the passenger car and is connected with a plate heat exchanger and a battery cooling loop, the plate heat exchanger is connected with the air conditioning system in parallel, and the battery cooling loop is connected with the plate heat exchanger. The battery cooling loop comprises a battery box and is used for cooling the battery box; the motor cooling loop comprises a motor heat dissipation water tank and a driving motor, the motor heat dissipation water tank is arranged on the roof of the passenger car, the driving motor is arranged at the bottom of the passenger car, and the motor heat dissipation water tank is connected with the driving motor and cools the driving motor; when the temperature of the battery box is within the set temperature, the battery cooling loop is used for cooling the battery box; when the temperature of the battery box exceeds the set temperature, the air conditioning system is matched with the battery cooling loop through the plate heat exchanger to cool the battery box.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of passenger train heat dissipation technology, especially relates to a passenger train battery and motor heat dissipation system. BACKGROUND

[0002] The trend of public passenger trains is to use pure electric technology, and large buses using fuel engine technology are gradually eliminated. The battery provides power for the new energy passenger train roof-mounted air conditioning product, and the battery has the best life cycle temperature at 25 DEG C to 35 DEG C, so the temperature has a very significant influence on the overall performance and service life of the battery.

[0003] At present, the electric air conditioner cooling device can only provide cooling and heating environment for the bus passenger area, and does not consider the battery cooling demand. If a shared battery cooling is used, the passenger area cooling capacity will be lost, the low-frequency compressor will be caused during parking charging, the compressor will be frequently started and stopped, the failure rate will be greatly improved, and the energy saving purpose cannot be achieved. In addition, the motor temperature rises during long-time operation of the passenger train, and the cooling device is needed to cool the motor. The existing cooling device is generally installed at the bottom of the vehicle, and in order to reduce the volume, the radiator and the cooling fan are usually used to cool the motor, and the cooling effect is poor. Therefore, an integrated electric air conditioner device for battery and motor cooling is needed. SUMMARY

[0004] To solve the above technical problems, the utility model provides a passenger train battery and motor heat dissipation system, which can effectively control the cooling of the battery and the motor, improve the endurance mileage of the whole vehicle, and the energy saving effect is obvious.

[0005] Specifically, the utility model discloses a passenger train battery and motor heat dissipation system, which comprises:

[0006] An air conditioning system is arranged on the roof of the passenger train and provides refrigeration gas to the interior of the passenger train. The air conditioning system is connected with a plate heat exchanger and a battery cooling circuit. The plate heat exchanger is connected in parallel with the air conditioning system. The battery cooling circuit is connected with the plate heat exchanger. The battery cooling circuit comprises a battery box, and the battery cooling circuit is used for cooling the battery box.

[0007] A motor cooling circuit comprises a motor heat dissipation water tank and a driving motor. The motor heat dissipation water tank is arranged on the roof of the passenger train. The driving motor is arranged at the bottom of the passenger train. The motor heat dissipation water tank is connected with the driving motor and is used for cooling the driving motor.

[0008] When the temperature of the battery box is within the set temperature, the battery cooling circuit is used for cooling the battery box. When the temperature of the battery box exceeds the set temperature, the air conditioning system cooperates with the plate heat exchanger and the battery cooling circuit to cool the battery box.

[0009] Further, the air conditioning system comprises a compressor, a four-way reversing valve, a condenser, an evaporator, a high-pressure exhaust port of the compressor is connected with the condenser through an oil separator, the four-way reversing valve, the condenser is connected with the evaporator through a drier, a first electronic expansion valve and a liquid distribution head, and the evaporator is connected with an air inlet of the compressor through the four-way reversing valve and a gas-liquid separator.

[0010] Further, a first liquid inlet of the plate heat exchanger is connected with the drier through a second electronic expansion valve, and a first liquid outlet of the plate heat exchanger is connected with the four-way reversing valve.

[0011] Further, the battery cooling circuit further comprises a battery heat dissipation water tank, one end of the battery heat dissipation water tank is connected with a second liquid inlet of the plate heat exchanger, and the other end of the battery heat dissipation water tank is connected with a second liquid outlet of the plate heat exchanger; wherein,

[0012] The outlet of the battery box is connected with the connection pipeline at the first branch opening on the side of the second liquid inlet, and the first electronic water valve and the second electronic water valve are arranged on the two sides of the first branch opening respectively.

[0013] Further, the first water tank, the water filter and the first water pump are sequentially connected between the inlet of the battery box and the second liquid outlet, and the first water tank is further connected with a degassing pipe.

[0014] Further, the high-pressure exhaust port of the compressor and the four-way reversing valve are sequentially connected with a pressure relief valve and a high-pressure sensor.

[0015] Further, the four-way reversing valve and the gas-liquid separator are sequentially connected with a main return gas temperature sensor, a low-pressure sensor and an oil return capillary; wherein,

[0016] The oil return capillary is connected with the oil separator.

[0017] Further, the water outlet of the motor heat dissipation water tank and the driving motor are sequentially connected with a second water tank and a second water pump.

[0018] Further, the battery heat dissipation water tank and the motor heat dissipation water tank are further connected with a heat dissipation fan above.

[0019] The utility model discloses the beneficial effect lies in:

[0020] When the passenger car is charging, even if the air conditioner is not opened, the battery cooling circuit can cool the battery alone, improves the endurance mileage of the whole car, and the energy-saving effect is obvious, in addition, the independent motor cooling circuit cools the driving motor simultaneously, guarantees the driving force of the driving motor, and improves the service life. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0022] Figure 1 is the axonometric view of the bus battery and motor heat dissipation system;

[0023] Figure 2 is the plan view of the bus battery and motor heat dissipation system;

[0024] Figure 3 is the partial enlarged view of the bus battery and motor heat dissipation system;

[0025] Figure 4 is the schematic diagram of the bus battery heat dissipation system;

[0026] Figure 5 is the schematic diagram of the bus motor heat dissipation system;

[0027] Figure 6 is the refrigerant flow process diagram.

[0028] The labels involved in the drawings are as follows: air conditioning system 1, compressor 101, four-way reversing valve 102, condenser 103, evaporator 104, oil separator 105, dryer 106, gas-liquid separator 107, first electronic expansion valve 108, second electronic expansion valve 109, pressure relief valve 110, high pressure sensor 111, main return gas temperature sensor 112, low pressure sensor 113, oil return capillary 114, auxiliary return gas temperature sensor 115, sight glass 116, distribution head 117, plate heat exchanger 2, first liquid inlet 21, first liquid outlet 22, second liquid inlet 23, second liquid outlet 24, water outlet temperature sensor 25, battery cooling circuit 3, battery box 31, battery heat dissipation water tank 32, branch part 33, degassing pipe 34, first electronic water valve 35, second electronic water valve 36, first water tank 37, water filter 38, first water pump 39, motor cooling circuit 4, motor heat dissipation water tank 41, driving motor 42, second water tank 43, second water pump 44, heat dissipation fan 5, evaporation fan 6. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below with reference to the drawings.

[0030] As Figures 1-6 shown, the present application discloses a bus battery and motor heat dissipation system, comprising:

[0031] The air conditioning system 1 is arranged on the roof of the passenger car and provides refrigerated air to the interior of the passenger car, and the air conditioning system 1 is connected with a plate heat exchanger 2 and a battery cooling circuit 3, the plate heat exchanger 2 is connected in parallel with the air conditioning system 1, the battery cooling circuit 3 is connected with the plate heat exchanger 2, and the battery cooling circuit 3 comprises a battery box 31 and cools the battery box 31.

[0032] The motor cooling circuit 4 comprises a motor cooling water tank 41 and a driving motor 42, the motor cooling water tank 41 is arranged on the roof of the passenger car, the driving motor 42 is arranged at the bottom of the passenger car, and the motor cooling water tank 41 is connected with the driving motor 42 to cool the driving motor 42.

[0033] When the temperature of the battery box 31 is within the set temperature, the battery cooling circuit 3 cools the battery box 31; when the temperature of the battery box 31 exceeds the set temperature, the air conditioning system 1 cools the battery box 31 through cooperation of the plate heat exchanger 2 and the battery cooling circuit 3.

[0034] When the passenger car is charging, even if the air conditioner is not turned on, the battery cooling circuit can cool the battery alone, which improves the cruising range of the whole vehicle and has obvious energy-saving effect, and in addition, the battery cooling water tank is arranged on the roof of the passenger car, which improves the space of the passenger compartment, and the independent motor cooling circuit cools the driving motor 42 to ensure the driving force of the driving motor 42 and improve the service life thereof.

[0035] The outlet of the motor cooling water tank 41 and the driving motor 42 are connected with a second water tank 43 and a second water pump 44 in sequence, and the second water tank 43 improves the stability of the second water pump 44 during operation.

[0036] In the embodiment, the air conditioning system 1 comprises a compressor 101, a four-way reversing valve 102, a condenser 103, and an evaporator 104, the high-pressure exhaust port of the compressor 101 is connected with the condenser 103 through an oil separator 105 and the four-way reversing valve 102, the condenser 103 is connected with the evaporator 104 through a drier 106, a first electronic expansion valve 108, and a distribution head 117, and the evaporator 104 is connected with the air inlet of the compressor 101 through the four-way reversing valve 102 and a gas-liquid separator 107. The refrigerant flows back to the compressor 101 along the oil separator 105, the four-way reversing valve 102, the condenser 103, the drier 106, a sight glass 116, the first electronic expansion valve 108, the evaporator 104, and the gas-liquid separator 107 to complete a working cycle.

[0037] In order to improve the stability of the compressor 101, the state of the compressor 101 is monitored, the high-pressure exhaust port of the compressor 101 is connected with the pressure relief valve 110 and the high-pressure sensor 111 between the four-way reversing valve 102, and the main gas return temperature sensor 112, the low-pressure sensor 113 and the oil return capillary tube 114 are further connected between the four-way reversing valve 102 and the gas-liquid separator 107; the first liquid outlet 22 is connected with the auxiliary gas return temperature sensor 115; wherein the oil return capillary tube 114 is connected with the oil separator 105. The setting mode realizes the monitoring of the temperature, pressure and other indicators during the operation of the compressor 101, and ensures the stability of the operation of the compressor 101.

[0038] The first liquid inlet 21 of the plate heat exchanger 2 is connected with the dryer 106 through the second electronic expansion valve 109, and the first liquid outlet 22 of the plate heat exchanger 2 is connected with the four-way reversing valve 102.

[0039] The battery cooling circuit 3 further comprises a battery cooling water tank 32, one end of the battery cooling water tank 32 is connected with the second liquid inlet 23 of the plate heat exchanger 2, and the other end is connected with the second liquid outlet 24 of the plate heat exchanger 2; the outlet of the battery box 31 and the connection between the second liquid inlet 23 of the connecting pipeline form a branch part 33, and the two sides of the branch part 33 are respectively provided with the first electronic water valve 35 and the second electronic water valve 36. In addition, the inlet of the battery box 31 and the second liquid outlet 24 are sequentially connected with the first water tank 37, the water filter 38 and the first water pump 39, and the first water tank 37 is further connected with the degassing pipe 34. The first water tank 37 improves the stability of the first water pump 39 during operation, and at the same time, the setting of the degassing pipe 34 can prevent the water pump from sucking in air or steam during the water pumping process, further improving the stability of the first water pump 39.

[0040] The battery cooling circuit 3 cools the battery box 31, when the temperature of the battery does not exceed the set temperature, the second electronic expansion valve 109 is closed, the first electronic water valve 35 is closed, the liquid in the battery cooling water tank 32 passes through the water filter 38 and the first water pump 39, enters the battery box 31, and then flows into the battery cooling water tank 32 again, to cool the battery box 31; when the temperature of the battery exceeds the set temperature, the second electronic expansion valve 109 is opened, the first electronic water valve 35 is opened, part of the refrigerant passes through the first liquid inlet 21 and is discharged at the first liquid outlet 22, the liquid in the battery cooling water tank 32 flows out at the outlet, enters the battery box 31 through the water filter 38 and the first water pump 39, and then flows out of the battery box 31, part of which passes through the first water valve 35, the second liquid inlet 23, enters the plate heat exchanger 2, flows out at the second liquid outlet 24, passes through the outlet water temperature sensor 25, enters the filter 38, and the other part enters the battery cooling water tank 32, flows out of the cooling water tank again, passes through the water filter 38 and the first water pump 39, enters the battery box 31, and cools the liquid in the circuit in the plate heat exchanger 2, improves the cooling efficiency, and quickly makes the temperature of the battery reach the set requirement.

[0041] In some embodiments, the battery cooling water tank 32 and the motor cooling water tank 41 are further connected with cooling fans 5, which further improve the cooling effect of the cooling water tank, and one side of the evaporator 104 is provided with an evaporating fan 6.

[0042] For those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A bus battery and motor cooling system, characterized in that: include: An air conditioning system (1), the air conditioning system (1) being arranged on the roof of a bus and providing cooling gas to the interior of the bus, the air conditioning system (1) being connected to a plate heat exchanger (2) and a battery cooling circuit (3), the plate heat exchanger (2) being connected in parallel to the air conditioning system (1), the battery cooling circuit (3) being connected to the plate heat exchanger (2), the battery cooling circuit (3) comprising a battery box (31), and the battery cooling circuit (3) cooling the battery box (31); A motor cooling circuit (4), the motor cooling circuit (4) comprising a motor cooling water tank (41) and a drive motor (42), the motor cooling water tank (41) being arranged on the roof of the bus, the drive motor (42) being arranged on the bottom of the bus, the motor cooling water tank (41) being connected to the drive motor (42) to cool the drive motor (42); When the temperature of the battery box (31) is within the set temperature, the battery cooling circuit (3) cools the battery box (31); when the temperature of the battery box (31) exceeds the set temperature, the air conditioning system (1) cooperates with the battery cooling circuit (3) through the plate heat exchanger (2) to cool the battery box (31).

2. The bus battery and motor cooling system according to claim 1, characterized in that: The air conditioning system (1) comprises a compressor (101), a four-way reversing valve (102), a condenser (103), and an evaporator (104); the high-pressure exhaust port of the compressor (101) is connected to the condenser (103) via an oil-liquid separator (105) and a four-way reversing valve (102); the condenser (103) is connected to the evaporator (104) via a dryer (106), a first electronic expansion valve (108), and a liquid separator (117); and the evaporator (104) is connected to the air inlet of the compressor (101) via the four-way reversing valve (102) and the gas-liquid separator (107).

3. The bus battery and motor cooling system according to claim 2, characterized in that: The first liquid inlet (21) of the plate heat exchanger (2) is connected to the dryer (106) via a second electronic expansion valve (109), and the first liquid outlet (22) of the plate heat exchanger (2) is connected to the four-way reversing valve (102).

4. The bus battery and motor cooling system according to claim 2, characterized in that: The battery cooling circuit (3) further includes a battery heat dissipation water tank (32), one end of the battery heat dissipation water tank (32) is connected to the second liquid inlet (23) of the plate heat exchanger (2), and the other end is connected to the second liquid outlet (24) of the plate heat exchanger (2); wherein, A bifurcation (33) is formed at the connection between the outlet of the battery box (31) and the connecting pipe where the second liquid inlet (23) is located, and a first electronic water valve (35) and a second electronic water valve (36) are respectively provided on both sides of the bifurcation (33).

5. The bus battery and motor cooling system according to claim 4, characterized in that: A first water tank (37), a water filter (38) and a first water pump (39) are sequentially connected between the inlet of the battery box (31) and the second liquid outlet (24); the first water tank (37) is also connected to a degassing pipe (34).

6. The bus battery and motor cooling system according to claim 3, characterized in that: A pressure relief valve (110) and a high-pressure sensor (111) are sequentially connected between the high-pressure exhaust port of the compressor (101) and the four-way reversing valve (102).

7. The bus battery and motor cooling system according to claim 3, characterized in that: A main return air temperature sensor (112), a low pressure sensor (113) and an oil return capillary (114) are sequentially connected between the four-way reversing valve (102) and the gas-liquid separator (107); wherein, The oil return capillary (114) is connected to the oil-liquid separator (105).

8. The bus battery and motor cooling system according to claim 1, characterized in that: A second water tank (43) and a second water pump (44) are sequentially connected between the water outlet of the motor heat dissipation water tank (41) and the drive motor (42).

9. The bus battery and motor cooling system according to claim 4, characterized in that: A cooling fan (5) is also connected above the battery cooling water tank (32) and the motor cooling water tank (41).

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