CN204749845U - Be used for fuel cell car cooling loop sys tem - Google Patents

Abstract

The utility model relates to a fuel cell thermal management system, concretely relates to fuel cell car cooling loop sys tem, include electric cooling in heap but loop and power control unit cooling loop, electricity cooling in heap but loop includes expansion tank, pile water pump, pile radiator, intercooler and pile, power control component cooling system includes expansion tank, power control unit water pump, power control unit radiator and the driving motor who connects gradually with the pipeline, at but at least one air relief valve of peak installation of loop of electric cooling in heap, at least one air relief valve of peak installation at power control unit cooling loop. The beneficial effects of the utility model are that, need not to install the blast pipe on whole car to simplified the pipeline design, it is easy that the space is arranged to whole car pipeline, reduced whole checheng this.

Description

For fuel cell vehicle cooling loop system

technical field

The utility model relates to a fuel cell thermal management system, in particular to a fuel cell vehicle cooling loop system.

Background technique

Human beings are facing energy crisis and environmental degradation, so electric vehicles will become the mainstream of future vehicle development. Fuel cell vehicles can not only solve the energy crisis and environmental problems faced by people, but also solve the problem of short battery life of pure electric vehicles. However, many key points in fuel cell vehicles will generate a lot of heat during the working process, such as the battery stack, drive motor, power control unit, etc. If the heat cannot be discharged in time, it will have an adverse effect on the parts. It cools down. Therefore, the cooling system of fuel cell vehicles is more complicated than that of electric vehicles, and it is more difficult to arrange in a limited space. The fuel cell vehicle cooling loop is divided into the stack cooling loop and the power control unit cooling loop. Usually, the exhaust pipe is connected to the expansion tank to realize the exhaust function. Due to the large number of parts arranged in the cooling loop, the exhaust design of a single cooling loop cannot meet the exhaust requirements when filling the coolant, so it is necessary to design multiple exhaust pipes, resulting in too many exhaust pipes and the layout difficult question.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a cooling loop system which effectively simplifies the pipeline design of the cooling system.

In order to achieve the above purpose, a fuel cell vehicle coolant loop system is provided, including a stack cooling loop and a power control unit cooling loop; the stack cooling loop includes an expansion tank, a stack water pump, a stack radiator, and a The cooler and the electric stack, the expansion water tank, the electric stack water pump and the electric stack radiator are connected by pipelines in sequence. After the intercooler and the electric stack are connected in parallel, its inlet is connected to the outlet of the electric stack radiator, and its outlet is connected to the electric stack The inlet of the water pump; the cooling system of the power control unit includes the expansion tank, the water pump of the power control unit, the radiator of the power control unit and the driving motor connected in sequence by pipelines, and the output pipe of the driving motor is connected to the inlet of the water pump of the power control unit; Install at least one automatic exhaust valve at the highest point of the road; install at least one automatic exhaust valve at the highest point of the cooling loop of the power control unit.

The highest point refers to the highest component in the vertical direction in the position layout.

The automatic exhaust valve is a commonly used component for adjusting pressure in the field. It consists of a buoy and a valve stem. When the pressure is greater than the system pressure, the drop of the buoy drives the valve stem to move downward, and the valve port opens; otherwise, the valve port closes.

Specifically, the intercooler is the highest point on the stack cooling loop, and an automatic exhaust valve is provided on the intercooler. Or the stack radiator is the highest point on the stack cooling loop, and the stack radiator is provided with an automatic exhaust valve.

Specifically, the radiator of the power control unit is the highest point of the cooling system of the power control unit, and an automatic exhaust valve is provided on the radiator of the power control unit.

Preferably, there are three automatic exhaust valves, wherein the intercooler and the electric stack radiator are both the highest points on the electric stack cooling loop, and the power control unit radiator is the highest point of the power control unit cooling system; There is an automatic exhaust valve on the stack radiator and the power control unit radiator respectively.

The fuel cell vehicle cooling loop system of the utility model completes the exhaust function by setting the automatic exhaust valve at the highest point of the two cooling loops, replaces the exhaust pipe structure on the cooling loop, and can effectively complete the exhaust With the function of achieving good exhaust effect, the pipeline design of the cooling system is simplified, and the problem of too many exhaust pipelines is difficult to arrange.

The beneficial effect of the utility model is that there is no need to install an exhaust pipe on the whole vehicle, thereby simplifying the design of pipelines, making it easy to arrange space for the pipelines of the whole vehicle, and reducing the cost of the whole vehicle.

Description of drawings

Fig. 1 is a schematic diagram of the cooling loop system of the fuel cell vehicle of the present invention;

in:

1-expansion water tank 2-electric stack water pump 3-electric stack radiator

4-intercooler 5-electric stack 6-power control unit water pump

7-Power Control Unit Heat Dissipation

8-Drive motor 9-Auto exhaust valve device

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

According to a cooling loop system for a fuel cell vehicle shown in FIG. 1 , it includes two cooling loops, a stack cooling loop and a power control unit cooling loop. The stack cooling system includes an expansion tank 1 , a stack water pump 2 , a stack radiator 3 , an intercooler 4 , a stack 5 and an automatic exhaust valve 9 . Among them, the expansion tank 1, the electric stack water pump 2 and the electric stack radiator 3 are connected in series with pipes sequentially, the intercooler 4 and the electric stack 5 are connected in parallel and connected to the outlet of the electric stack radiator 3, and the intercooler 4 and the electric stack 5 are connected in parallel. The outlet is connected to the inlet of the stack water pump 2 to form a cycle. The stack radiator 3 and the intercooler 4 are higher than other components in position, and the tops of the two are at the same height. An automatic exhaust valve 9 is arranged on the top of the stack radiator 3 and the intercooler 4 . The power control unit cooling loop includes the expansion tank 1, the power control unit water pump 6, the power control unit radiator 7 and the driving motor 8 connected by pipelines in sequence. The outlet of the driving motor 8 is connected to the inlet of the power control unit water pump 6 to form a cycle. The position of the radiator 7 of the power control unit is higher than other components of the cooling circuit of the power control unit, and a self-control exhaust valve 9 is arranged on the radiator 7 of the power control unit. The automatic exhaust valve 9 is a common mechanical structure consisting of a buoy and a valve stem. When the pressure is greater than the system pressure, the drop of the buoy drives the valve stem to move downward, and the valve port is opened; otherwise, the valve port is closed.

This utility model uses an automatic exhaust valve in the cooling loop. When the coolant is filled, the gas will accumulate along the pipeline to the highest point, and the automatic exhaust valve is installed at the highest point of the cooling system. When the gas enters the automatic exhaust valve As the gas in the valve increases, the pressure rises. When the gas pressure is greater than the system pressure, the automatic exhaust valve will discharge the gas. When the gas pressure is lower than the system pressure, the automatic exhaust valve is automatically closed to ensure the normal flow of coolant in the cooling system.

The preferred embodiments of the utility model creation have been specifically described above, but the utility model creation is not limited to the described embodiments, and those skilled in the art can also make Various equivalent modifications or replacements are included within the scope defined by the claims of the present application.

Claims (5)

1., for a fuel-cell vehicle cooling loop system, comprise pile cooling loop and power control unit cooling loop;

Pile cooling loop comprises expansion tank (1), pile water pump (2), pile radiator (3), intercooler (4) and pile (5), described expansion tank (1), pile water pump (2) are connected with pipeline successively with pile radiator (3), after intercooler (4) and pile (5) parallel connection, its entrance is connected with the outlet of pile radiator (3), and its outlet is connected to the entrance of pile water pump (2);

Power control element cooling system comprises the expansion tank (1), power control unit water pump (6), power control unit radiator (7) and the drive motor (8) that connect successively with pipeline, and drive motor (8) delivery piping connects the entrance of power control unit water pump (6);

It is characterized in that, at the vertex of pile cooling loop, at least one automatic exhaust steam valve (9) is installed; At the vertex of power control unit cooling loop, at least one automatic exhaust steam valve (9) is installed.

2. fuel-cell vehicle cooling loop system according to claim 1, is characterized in that, described intercooler (4) is the vertex on pile cooling loop, and intercooler (4) is provided with automatic exhaust steam valve (9).

3. fuel-cell vehicle cooling loop system according to claim 1, it is characterized in that, described pile radiator (3) is the vertex on pile cooling loop, and pile radiator (3) is provided with automatic exhaust steam valve (9).

4. fuel-cell vehicle cooling loop system according to claim 1, it is characterized in that, the vertex that described power control unit radiator (7) is power control element cooling system, power control unit radiator (7) is provided with automatic exhaust steam valve (9).

5. arbitrary fuel-cell vehicle cooling loop system according to claims 1 to 4, it is characterized in that, there are three automatic exhaust steam valves (9), wherein intercooler (4) and pile radiator (5) are all the vertex on pile cooling loop, the vertex that power control unit radiator (7) is power control unit cooling system; Intercooler (4), pile radiator (3) and power control unit radiator (7) are respectively provided with an automatic exhaust steam valve (7).