Large-capacity liquid filling system for new energy automobile cooling liquid

Abstract

A new energy automobile cooling liquid large-capacity liquid filling system comprises a liquid supplementing tank, a back suction tank, a vacuum tank and a filling gun head, a liquid supplementing pipeline, a compressed air filling pipeline and a back suction tank connecting pipeline are arranged above the liquid supplementing tank, the back suction tank is communicated with the liquid supplementing tank through the back suction tank connecting pipeline, the back suction tank is connected with a vacuum generator, and the vacuum generator is connected with the filling gun head. The back suction tank is connected with a gun head filling pipe of the filling gun head through a back suction pipeline; the vacuum tank is connected with a vacuum pump and is connected with a gun head vacuumizing pipe of the filling gun head; and the lower part of the liquid supplementing tank is connected with a gun head filling pipe of the filling gun head through a liquid filling pipeline. The pre-vacuumizing effect in the cooling system can be achieved through the back suction tank and the vacuum generator, and therefore the time of the vacuumizing step is greatly shortened; in addition, after filling is completed, redundant cooling liquid filled into the vehicle cooling liquid kettle can be sucked back into the back suction tank through the back suction pipeline; therefore, the situation that liquid drops from the filling gun head after filling is completed is effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of electric vehicle processing, in particular to a coolant filling technology, and specifically to a large-capacity liquid filling system for coolant of new energy vehicles. Background Art

[0002] As the number of new energy electric vehicles manufactured and purchased has steadily increased compared to traditional vehicles, it has become increasingly urgent to study their specific production and maintenance methods. When adding coolant to a traditional fuel engine car, the engine can be turned on and kept idling. At this time, the car's cooling system is in working condition, so the coolant can be added smoothly; but pure electric vehicles are different. Because the car must be stationary when adding coolant, its cooling system generally does not work. At this time, since the water pump is not started, the air in the internal pipes of the cooling system cannot be discharged, which also causes the coolant to be unable to enter the internal pipes of the cooling system. If the cooling system cannot add enough refrigerant, it will seriously affect the driving performance of the vehicle and pose a safety hazard.

[0003] The maximum filling capacity of the refilling tank of the existing traditional assembly line automobile coolant filling equipment is only about 16L, which can meet the coolant filling demand of 8-15L of traditional fuel vehicles.

[0004] However, since the power devices such as battery packs, motors, motor controllers, and chargers of new energy vehicles need to be cooled, the cooling system of electric vehicles has become more complicated, and the requirement for the amount of coolant to be filled is higher. New energy vehicles generally require a filling amount of 20-25L. In order to meet the filling volume requirements of new energy vehicles, even if the refilling tank is refilled with liquid while the vehicle is refilled, the filling volume of more than 16L can barely be met. However, due to the large space of the pipelines in new energy vehicles, the corresponding vacuum pumping time will be extended, and the existing equipment cannot meet the needs of the production line beat.

[0005] In order to ensure the current production rhythm, the time of each cycle step has to be compressed. If the back-suction cleaning time is reduced, the back-suction cleaning time will be insufficient, resulting in serious dripping of the gun tip and pollution of the vehicle. At the same time, in the existing hardware structure design, pre-vacuuming, filling, back-suction, and liquid storage share the same tank body. The refilling tank can only refill liquid at the same time within a limited step time. The refilling time of the refilling tank after the cycle is insufficient, which cannot meet the needs of existing production. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a large-capacity liquid filling system for new energy vehicle coolant, which overcomes the deficiencies in the prior art and has a reasonable design. The pre-vacuuming effect in the cooling system can be achieved through a back-suction tank and a vacuum generator, thereby greatly shortening the time of the vacuuming step; in addition, after the filling is completed, the excess coolant added to the vehicle coolant oil pot can also be sucked back into the back-suction tank through the back-suction pipeline; thereby effectively avoiding the occurrence of dripping from the filling gun tip after the filling is completed.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A large-capacity liquid filling system for new energy vehicle coolant, comprising a liquid replenishment tank, a back-suction tank, a vacuum tank and a filling gun head, wherein the liquid replenishment tank is provided with a liquid replenishment pipeline, a compressed air filling pipeline and a back-suction tank connecting pipeline, the back-suction tank is connected to the liquid replenishment tank through the back-suction tank connecting pipeline, the back-suction tank is connected to the vacuum generator through a vacuum generator vacuum pipeline, the back-suction tank is connected to one end of the back-suction pipeline, a gun head filling pipe and a gun head vacuum pipe are provided in the filling gun head, the other end of the back-suction pipeline is connected to the gun head filling pipe of the filling gun head, and the gun head filling pipe of the filling gun head is connected to a vehicle coolant pot adapted to the filling gun head;

[0009] The vacuum end of the vacuum tank is connected to the vacuum pump through a pipeline, the air inlet end of the vacuum tank is connected to one end of the vacuum pipeline of the filling gun head, and the other end of the vacuum pipeline of the filling gun head is connected to the gun head vacuum pipe of the filling gun head;

[0010] The outlet end of the liquid replenishing tank is connected to one end of a liquid filling pipeline, and the other end of the liquid filling pipeline is connected to a gun head filling pipe of a filling gun head.

[0011] Preferably, one end of the compressed air filling pipeline is connected to the inner cavity of the fluid infusion tank, and the other end of the compressed air filling pipeline is connected to one end of the first branch pipe and one end of the second branch pipe respectively through a tee, and the other end of the first branch pipe and the other end of the second branch pipe are connected to the air input pipe through a tee; a low-pressure filling valve is installed on the first branch pipe, and a high-pressure filling valve is installed on the second branch pipe.

[0012] Preferably, a control valve is installed on the outlet end of the liquid replenishment tank; and a pressure sensor and a flow meter are installed on the liquid filling pipeline.

[0013] Preferably, a vacuum sensor is installed on the vacuum extraction pipeline of the filling gun head.

[0014] Preferably, the vacuum generator vacuum pipeline is connected to the top of the back-suction tank.

[0015] Preferably, one end of the back-suction pipeline is connected to a side surface of the back-suction tank.

[0016] Preferably, the outlet end of the fluid infusion tank is arranged below the bottom or side of the fluid infusion tank.

[0017] The present invention provides a large-capacity liquid filling system for new energy vehicle coolant. It has the following beneficial effects: by setting up a back-suction tank and a vacuum generator, a pre-vacuuming effect in the cooling system can be achieved, so that the vacuuming speed can be made faster through the joint action of the vacuum generator and the vacuum pump, thereby greatly shortening the time required for the vacuuming step; in addition, after the filling is completed, the excess coolant in the vehicle coolant oil pot will be sucked back into the back-suction tank through the back-suction pipeline; thereby effectively avoiding the occurrence of dripping from the filling gun tip after the filling is completed; and by setting up a low-pressure filling valve and a high-pressure filling valve, a high-low pressure switching filling mode can be realized, so that the filling speed is increased, thereby greatly shortening the time used for filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings required for describing the prior art are briefly introduced below.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the filling gun head in the present invention;

[0021] Description of the numbers in the figure:

[0022] 1. Fluid replenishment tank; 2. Back-suction tank; 3. Vacuum tank; 4. Filling gun head; 5. Fluid replenishment pipeline; 6. Compressed air filling pipeline; 7. Back-suction tank connecting pipeline; 8. Vacuum generator vacuum pipeline; 9. Vacuum generator; 10. Back-suction pipeline; 11. Vacuum pump; 12. Vacuum filling gun head pipeline; 13. Liquid filling pipeline; 14. Low-pressure filling valve; 15. High-pressure filling valve; 16. Control valve; 17. Pressure sensor; 18. Flow meter; 19. Vacuum sensor; 41. Gun head filling pipe; 42. Gun head vacuum pipe; 61. First branch pipe; 62. Second branch pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0024] Embodiment 1, as Figure 1-2As shown, a large-capacity liquid filling system for new energy vehicle coolant comprises a liquid replenishing tank 1, a back-suction tank 2, a vacuum tank 3 and a filling gun head 4, the liquid replenishing tank 1 is respectively provided with a liquid replenishing pipeline 5, a compressed air filling pipeline 6 and a back-suction tank connecting pipeline 7, the liquid replenishing pipeline 5 can be used to replenish the coolant in the liquid replenishing tank 1, the bottom of the back-suction tank 2 is connected to the liquid replenishing tank 1 through the back-suction tank connecting pipeline 7, the top of the back-suction tank 2 is connected to the vacuum generator 9 through the vacuum generator vacuum pipeline 8, the side of the back-suction tank 2 is connected to one end of the back-suction pipeline 10, the filling gun head 4 is respectively provided with a gun head filling pipe 41 and a gun head vacuum pipe 42, the other end of the back-suction pipeline 10 is connected to the gun head filling pipe 41 of the filling gun head 4;

[0025] The exhaust end of the vacuum tank 3 is connected to the vacuum pump 11 through a pipeline, the air inlet end of the vacuum tank 3 is connected to one end of the filling gun head vacuum extraction pipeline 12, and the other end of the filling gun head vacuum extraction pipeline 12 is connected to the gun head vacuum extraction pipe 42 of the filling gun head 4;

[0026] The bottom outlet of the liquid replenishment tank 1 is fixedly connected to one end of the liquid filling pipeline 13, and the other end of the liquid filling pipeline 13 is connected to the gun head filling pipe 41 of the filling gun head 4. A control valve 16 is installed on the lower outlet of the liquid replenishment tank 1, and electromagnetic valves are provided on the liquid replenishment pipeline 5, the back-suction tank connecting pipeline 7, the back-suction pipeline 10 and the filling gun head vacuum pipeline 12. The opening or closing control of the liquid replenishment pipeline 5, the back-suction tank connecting pipeline 7, the back-suction pipeline 10 and the filling gun head vacuum pipeline 12 can be realized through the electromagnetic valve.

[0027] Working principle:

[0028] When filling the coolant of the electric vehicle, the lower end of the filling gun head 4 is aligned with the water inlet end of the vehicle cooling system, and then the vacuum generator 9 and the vacuum pump 11 are started, and the back-suction tank 2 is evacuated through the vacuum generator 9, and the back-suction pipeline 10 is connected with the gun head filling pipe 41 of the filling gun head 4, so that the pre-vacuum effect in the cooling system can be achieved, and the vacuum tank 3 is evacuated through the vacuum pump 11, and then the vehicle cooling system is evacuated through the filling gun head vacuum pipeline 12 and the gun head vacuum pipe 42, so that the vacuum generator 9 and the vacuum pump 11 can work together to make the vacuuming speed faster, thereby greatly shortening the time of the vacuuming step;

[0029] Afterwards, the control valve 16 at the lower outlet end of the refilling tank 1 is opened, so that the coolant in the refilling tank 1 is transported to the gun head refilling pipe 41 of the filling gun head 4 through the liquid filling pipeline 13, and then the cooling system of the car is filled; and when the filling is about to be completed, the vacuum generator 9 can be started again, so that the back-suction tank 2 can give a suction effect to the gun head refilling pipe 41 of the filling gun head 4 through the back-suction pipeline 10, so when the filling is completed, the control valve 16 is closed, and the coolant in the gun head refilling pipe 41 is sucked back into the back-suction tank 2 through the back-suction pipeline 10; thereby effectively avoiding the occurrence of dripping of the filling gun head 4 after the filling is completed; and the whole process does not affect the refilling speed of the refilling tank 1 itself. After the filling is completed, the coolant sucked back in the back-suction tank 2 flows into the refilling tank 1 again through the back-suction tank connecting pipeline 7.

[0030] In this embodiment, since the refilling tank 1 is completely used for the refilling function and is no longer used for back suction and pre-vacuuming, the volume of the refilling tank 1 can be changed to 30L, and in order to meet the assembly of the new large-capacity filling storage tank, the frame design of the equipment can be enlarged from 800mm to 1000mm. In order to optimize the size of the equipment, the refilling tank 1 is changed from being installed on the back of the equipment to being installed on the left side of the equipment.

[0031] Embodiment 2, as a further preferred embodiment of embodiment 1, one end of the compressed air filling pipeline 6 is connected to the inner cavity of the fluid infusion tank 1, and the other end of the compressed air filling pipeline 6 is connected to one end of the first branch pipe 61 and one end of the second branch pipe 62 through a tee respectively, and the other end of the first branch pipe 61 and the other end of the second branch pipe 62 are connected to the air input pipe through a tee; a low-pressure filling valve 14 is installed on the first branch pipe 61, and a high-pressure filling valve 15 is installed on the second branch pipe 62.

[0032] During the filling process, the high-pressure filling valve 15 can be opened first to perform high-pressure filling. When the high-pressure filling amount reaches 80% of the set value, the high-pressure filling valve 15 is closed and the low-pressure filling valve 14 is opened to switch to low-pressure filling, thereby greatly improving the filling speed and effectively shortening the time currently used for low-pressure filling.

[0033] Embodiment 3, as a further preferred solution of Embodiment 1, a pressure sensor 17 and a flow meter 18 are installed on the liquid filling pipeline 13. The pressure sensor 17 and the flow meter 18 are used to sense the flow information of the coolant during the filling process, and transmit the signal to the control system, which can then make data judgment through the control system to control the opening or closing of the high-pressure filling valve 15 and the low-pressure filling valve 14.

[0034] Embodiment 4, as a further preferred embodiment of embodiment 1, a vacuum sensor 19 is installed on the filling gun head vacuum pipeline 12. The vacuum sensor 19 can be used to judge the vacuum rate in the cooling system during the vacuum step.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-capacity liquid filling system for new energy vehicle coolant, characterized in that: The invention comprises a liquid replenishing tank (1), a back-suction tank (2), a vacuum tank (3) and a filling gun head (4); the liquid replenishing tank (1) is provided with a liquid replenishing pipeline (5), a compressed air filling pipeline (6) and a back-suction tank connecting pipeline (7); the back-suction tank (2) is connected to the liquid replenishing tank (1) via the back-suction tank connecting pipeline (7); the back-suction tank (2) is connected to a vacuum generator (9) via a vacuum generator vacuumizing pipeline (8); the back-suction tank (2) is connected to one end of the back-suction pipeline (10); a gun head filling pipe (41) and a gun head vacuumizing pipe (42) are provided in the filling gun head (4); the other end of the back-suction pipeline (10) is connected to the gun head filling pipe (41) of the filling gun head (4); The air extraction end of the vacuum tank (3) is connected to the vacuum pump (11) via a pipeline, the air inlet end of the vacuum tank (3) is connected to one end of the filling gun head vacuum extraction pipeline (12), and the other end of the filling gun head vacuum extraction pipeline (12) is connected to the gun head vacuum extraction pipe (42) of the filling gun head (4); The outlet end of the liquid replenishing tank (1) is connected to one end of a liquid filling pipeline (13), and the other end of the liquid filling pipeline (13) is connected to a gun tip filling pipe (41) of a filling gun tip (4).

2. A large-capacity liquid filling system for new energy vehicle coolant according to claim 1, characterized in that: One end of the compressed air filling pipeline (6) is in communication with the inner cavity of the liquid infusion tank (1), and the other end of the compressed air filling pipeline (6) is respectively connected to one end of a first branch pipe (61) and one end of a second branch pipe (62) through a tee, and the other end of the first branch pipe (61) and the other end of the second branch pipe (62) are connected to an air input pipe through a tee; a low-pressure filling valve (14) is installed on the first branch pipe (61), and a high-pressure filling valve (15) is installed on the second branch pipe (62).

3. A large-capacity liquid filling system for new energy vehicle coolant according to claim 1, characterized in that: A control valve (16) is installed on the outlet end of the liquid replenishment tank (1); and a pressure sensor (17) and a flow meter (18) are installed on the liquid filling pipeline (13).

4. A large-capacity liquid filling system for new energy vehicle coolant according to claim 1, characterized in that: A vacuum sensor (19) is installed on the filling gun head vacuum pipeline (12).

5. A large-capacity liquid filling system for new energy vehicle coolant according to claim 1, characterized in that: The vacuum generator vacuum extraction pipeline (8) is connected to the top of the back-suction tank (2).

6. A large-capacity liquid filling system for new energy vehicle coolant according to claim 1, characterized in that: One end of the back-suction pipeline (10) is connected to the side surface of the back-suction tank (2).

7. A large-capacity liquid filling system for new energy vehicle coolant according to claim 1, characterized in that: The outlet end of the fluid replenishment tank (1) is arranged at the bottom or below the side of the fluid replenishment tank (1).

Images