Combined vehicle-mounted liquid hydrogen thermal management system

Abstract

The utility model relates to the technical field of liquid hydrogen storage equipment, and discloses a combined type vehicle-mounted liquid hydrogen heat management system which comprises a liquid hydrogen electric valve, the top of the liquid hydrogen electric valve is communicated with an air temperature type heat exchanger, the outer side of the air temperature type heat exchanger is communicated with a check valve, the outer side of the check valve is fixedly connected with a control module, and the control module is connected with the air temperature type heat exchanger. The other end of the check valve communicates with a water-soluble heat exchanger, the outer side of the water-soluble heat exchanger is fixedly connected with a hydrogen outlet temperature sensor, the top of the water-soluble heat exchanger is fixedly connected with a hydrogen outlet pressure sensor, and the outer wall of the water-soluble heat exchanger is fixedly connected with a first WG outlet temperature sensor. According to the utility model, the space is saved through the integrated module, the vehicle can be flexibly started according to conditions to guarantee starting, heating is carried out according to needs after starting, energy saving and temperature control are carried out in normal operation, the fan is started under full load, and heat management is balanced through small-load valve adjustment so as to reduce energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen storage equipment, and in particular to a combined vehicle-mounted liquid hydrogen thermal management system. Background Art

[0002] On-board liquid hydrogen refers to liquid hydrogen that is specially stored and transported for vehicle operation. Liquid hydrogen has the characteristics of high energy density. Its application in vehicles can provide efficient and clean energy for the vehicle's drive system. In order to facilitate the thermal management of liquid hydrogen, a combined on-board liquid hydrogen thermal management system is required.

[0003] A combined on-board liquid hydrogen thermal management system refers to a system specifically used for vehicles, which is composed of a plurality of interrelated components and modules and is used for temperature control and management during the storage and use of liquid hydrogen.

[0004] In the combined on-board liquid hydrogen thermal management systems currently on the market, the coolant cannot be passed into the water bath heat exchanger for heat exchange. In actual use, the hydrogen stored in the buffer tank cannot meet the battery stack startup requirements, thus reducing the practicability of the device. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a combined on-board liquid hydrogen thermal management system, which aims to improve the problem in the thermal management system in the prior art that the coolant cannot pass into the water bath heat exchanger for heat exchange.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a combined on-board liquid hydrogen thermal management system, comprising a liquid hydrogen electric valve, the top of the liquid hydrogen electric valve is connected to an air-temperature heat exchanger, the outside of the air-temperature heat exchanger is connected to a check valve, the outside of the check valve is fixedly connected to a control module, the other end of the check valve is connected to a water-soluble heat exchanger, the outside of the water-soluble heat exchanger is fixedly connected to a hydrogen outlet temperature sensor, the top of the water-soluble heat exchanger is fixedly connected to a hydrogen outlet pressure sensor, the outer wall of the water-soluble heat exchanger is fixedly connected to a first WG outlet temperature sensor, the outside of the first WG outlet temperature sensor is provided with a first WG outlet check valve, the bottom of the water-soluble heat exchanger is provided with a WG outlet inlet electric valve, the right side of the air-temperature heat exchanger is provided with a WG outlet electric valve, the right side of the outer wall of the air-temperature heat exchanger is fixedly connected to a powerful fan, the bottom of the powerful fan is fixedly connected to a WG outlet temperature sensor, and the outside of the WG outlet temperature sensor is provided with a second WG outlet check valve.

[0007] The utility model has the following beneficial effects:

[0008] 1. In the utility model, by integrating the air-temperature heat exchanger, WG cooler, powerful fan and water bath heat exchanger into one module, the spatial structure layout is optimized, the vehicle space is saved, and the integration and compactness of the device are improved.

[0009] 2. In the utility model, when the vehicle is started, the starting mode can be flexibly selected according to the operating conditions of the battery stack and the storage amount of hydrogen in the buffer tank to ensure smooth starting of the battery stack, thereby improving the reliability and adaptability of the starting.

[0010] 3. In the utility model, when the hydrogen in the buffer tank cannot meet the demand after the vehicle is started, the control module regulates the liquid hydrogen to be heated by the air-temperature heat exchanger, and a powerful fan can be started to assist in heating to meet the outlet temperature requirements, thereby ensuring the energy supply and temperature conditions when the vehicle is started.

[0011] 4. In the present invention, after the vehicle is running normally, the powerful fan is turned off, and the liquid hydrogen is heated by the air-temperature heat exchanger and the water-bath heat exchanger to reach the required temperature of the battery stack, thereby achieving efficient use of energy and precise temperature control.

[0012] 5. In the utility model, when the vehicle is fully loaded and the air supply is large, a powerful fan is started to assist the air-temperature heat exchanger in heat exchange, so as to meet the outlet temperature requirement and ensure the stable performance and energy supply of the vehicle when running at high load.

[0013] 6. In the utility model, when the vehicle is under small load and the air supply is small, the control module adjusts the valve to allow the battery stack coolant to enter the fan cooling system, and the liquid hydrogen is only heated by the air-temperature heat exchanger. At the same time, the powerful fan both assists in heating the liquid hydrogen and cools the battery stack coolant by strong wind, thereby achieving a balance in thermal management and effectively reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a combined vehicle-mounted liquid hydrogen thermal management system proposed by the utility model;

[0015] Legend:

[0016] 1. Liquid hydrogen electric valve; 2. Air-temperature heat exchanger; 3. Check valve; 4. Control module; 5. Water-soluble heat exchanger; 6. Hydrogen outlet temperature sensor; 7. Hydrogen outlet pressure sensor; 8. First WG outlet temperature sensor; 9. First WG outlet check valve; 10. WG outlet inlet electric valve; 11. WG outlet electric valve; 12. Powerful fan; 13. Second WG outlet temperature sensor; 14. Second WG outlet check valve. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Reference Figure 1 The utility model provides an embodiment: a combined vehicle-mounted liquid hydrogen thermal management system, comprising a liquid hydrogen electric valve 1, the top of the liquid hydrogen electric valve 1 is connected to an air-temperature heat exchanger 2, the outside of the air-temperature heat exchanger 2 is connected to a check valve 3, the outside of the check valve 3 is fixedly connected to a control module 4, the other end of the check valve 3 is connected to a water-soluble heat exchanger 5, the outside of the water-soluble heat exchanger 5 is fixedly connected to a hydrogen outlet temperature sensor 6, the top of the water-soluble heat exchanger 5 is fixedly connected to a hydrogen outlet pressure sensor 7, the outer wall of the water-soluble heat exchanger 5 is fixedly connected to a hydrogen outlet temperature sensor 6, the top of the water-soluble heat exchanger 5 is fixedly connected to a hydrogen outlet pressure sensor 7, and the outer wall of the water-soluble heat exchanger 5 is fixedly connected to a hydrogen outlet temperature sensor 6. A first WG outlet temperature sensor 8 is fixedly connected, a first WG outlet check valve 9 is arranged outside the first WG outlet temperature sensor 8, a WG outlet inlet electric valve 10 is arranged at the bottom of the water-soluble heat exchanger 5, a WG outlet electric valve 11 is arranged on the right side of the air-temperature heat exchanger 2, a powerful fan 12 is fixedly connected to the right side of the outer wall of the air-temperature heat exchanger 2, a second WG outlet temperature sensor 13 is fixedly connected to the bottom of the powerful fan 12, and a second WG outlet check valve 14 is arranged outside the second WG outlet temperature sensor 13;

[0019] Specifically, when the vehicle starts, the liquid hydrogen electric valve 1 opens quickly, and the liquid hydrogen flows out smoothly, and the liquid hydrogen flows upward into the air-temperature heat exchanger 2. The special structure and heat transfer mechanism inside it enable the liquid hydrogen to quickly absorb the heat of the surrounding environment and achieve initial heating. The initially heated liquid hydrogen flows stably to the water-soluble heat exchanger 5 under the guidance of the check valve 3. In this process, the control module 4 on the outside of the check valve 3 plays a key regulatory role. It monitors the flow state, temperature, pressure and other parameters of the liquid hydrogen in real time, and performs precise control according to the preset algorithm and logic. The control module 4 can intelligently adjust the work of each component according to the operating conditions and needs of the vehicle. state to achieve the best thermal management effect. The water-soluble heat exchanger 5 plays an important role in the whole system. The hydrogen outlet temperature sensor 6 on the outside can monitor the temperature change of the hydrogen outlet in real time with extremely high accuracy and frequency to ensure that the temperature is always within a reasonable range. The hydrogen outlet pressure sensor 7 on the top pays close attention to the outlet pressure, which provides an important guarantee for the stable operation of the system. The WG outlet temperature sensor 8 fixedly connected to the outer wall of the water-soluble heat exchanger 5 cooperates well with the first WG outlet check valve 9 set on the outside to effectively control the flow direction and flow rate of the fluid. The WG outlet inlet electric valve 10 at the bottom is adjusted according to the control module 4. The WG outlet electric valve 11 on the right side of the air-temperature heat exchanger 2 can flexibly adjust the flow rate to meet different working conditions. When the vehicle is cold-started and the hydrogen in the buffer tank is insufficient, the liquid hydrogen is directly heated in the air-temperature heat exchanger 2. If the hydrogen outlet temperature does not meet the requirement at this time, the control module 4 will immediately start the powerful fan 12. The forced convection wind generated by the powerful fan 12 can significantly improve the heat exchange efficiency and quickly increase the hydrogen temperature to meet the vehicle startup requirements. When the fuel cell is operating normally, the coolant generated by the battery stack will be passed into the water-soluble heat exchanger 5 to efficiently heat with the liquid hydrogen. Heat exchange, when the car is running at a small load, liquid hydrogen can meet the heating requirements of the outlet hydrogen temperature by relying on the air-temperature heat exchanger 2. At this time, the control module 4 will accurately control the relevant valves to introduce the battery stack coolant into the fan cooling system. The powerful fan 12 assists in heating the liquid hydrogen on the one hand, and dissipates the coolant with strong wind on the other hand, effectively maintaining the thermal balance of the system. When the car has a slow load and a large flow of liquid hydrogen supply, if the outlet temperature is too low, the control module 4 will quickly start the powerful fan 12 again to assist in heating by enhancing the heat exchange effect, ensuring that the temperature requirements of the air supply can be met, and ensuring the stable operation of the vehicle under various complex working conditions.

[0020] Working principle: When using this combined on-board liquid hydrogen thermal management system, liquid hydrogen flows out from the liquid hydrogen electric valve 1 and enters the air-temperature heat exchanger 2 connected thereto for preliminary heating. The heated liquid hydrogen passes through the outer check valve 3 and flows to the water-soluble heat exchanger 5 connected at the other end under the regulation of the control module 4 fixed on the outer side of the check valve 3. A hydrogen outlet temperature sensor 6 is provided on the outer side of the water-soluble heat exchanger 5 for real-time monitoring of the hydrogen outlet temperature. The hydrogen outlet pressure sensor 7 fixed on the top monitors the outlet pressure. The first WG outlet temperature sensor 8 fixedly connected to the outer wall of the water-soluble heat exchanger 5 works in coordination with the first WG outlet check valve 9 arranged on the outer side. The WG outlet inlet electric valve 10 at the bottom controls the inlet and outlet. The WG outlet electric valve 11 on the right side of the air-temperature heat exchanger 2 adjusts the flow rate. The powerful fan 12 on the right side of the outer wall of the air-temperature heat exchanger 2 is used when needed. Auxiliary heating is performed when necessary. The second WG outlet temperature sensor 13 at the bottom of the powerful fan 12 and the second WG outlet check valve 14 on the outside jointly ensure stable operation of the system. When the car is cold-started, if there is insufficient hydrogen in the buffer tank, the liquid hydrogen is directly heated and supplied through the air-temperature heat exchanger 2. When the hydrogen outlet temperature is not reached, the control module 4 starts the powerful fan 12 for auxiliary heating. After the fuel cell operates normally, the battery stack coolant is passed into the water-soluble heat exchanger 5 for heat exchange. When the car is running at a low load, the liquid hydrogen relies on the air-temperature heat exchanger 2 to meet the outlet hydrogen temperature heating. The control module 4 controls the relevant valves to allow the battery stack coolant to pass into the fan cooling system. The powerful fan 12 assists in heating and dissipates heat from the coolant with strong wind. When the car has a slow load and a large flow of liquid hydrogen supply and the outlet temperature is too low, the control module 4 starts the powerful fan 12 again for auxiliary heating to meet the gas supply demand.

[0021] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined on-vehicle liquid hydrogen thermal management system, comprising a liquid hydrogen electric valve (1), characterized in that: The top of the liquid hydrogen electric valve (1) is connected to an air-temperature heat exchanger (2), the outside of the air-temperature heat exchanger (2) is connected to a check valve (3), the outside of the check valve (3) is fixedly connected to a control module (4), the other end of the check valve (3) is connected to a water-soluble heat exchanger (5), the outside of the water-soluble heat exchanger (5) is fixedly connected to a hydrogen outlet temperature sensor (6), the top of the water-soluble heat exchanger (5) is fixedly connected to a hydrogen outlet pressure sensor (7), and the outer wall of the water-soluble heat exchanger (5) is fixedly connected to a first WG outlet temperature sensor (8). A first WG outlet check valve (9) is arranged on the outside of the first WG outlet temperature sensor (8), a WG outlet inlet electric valve (10) is arranged on the bottom of the water-soluble heat exchanger (5), a WG outlet electric valve (11) is arranged on the right side of the air-temperature heat exchanger (2), a powerful fan (12) is fixedly connected to the right side of the outer wall of the air-temperature heat exchanger (2), a second WG outlet temperature sensor (13) is fixedly connected to the bottom of the powerful fan (12), and a second WG outlet check valve (14) is arranged on the outside of the second WG outlet temperature sensor (13).

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