阅读说明：本技术 一种混合动力汽车热管理系统及混合动力汽车 (Hybrid electric vehicle thermal management system and hybrid electric vehicle ) 是由 徐明星 梅赟栋 丁成 徐世龙 陈雷雷 易正根 于 2019-08-12 设计创作，主要内容包括：本发明涉及混合动力汽车技术领域,公开一种混合动力汽车热管理系统及混合动力汽车。其中,混合动力汽车热管理系统包括管路连接的泵体、发动机和燃料电池电堆,发动机和燃料电池电堆并联后,通过第一三通阀与泵体的出水口串联,冷却液能够由泵体的出水口流经第一三通阀后流入发动机和/或燃料电池电堆,然后流回泵体。本发明提供的混合动力汽车热管理系统,既能够利用发动机的余热加热燃料电池电堆,实现燃料电池电堆的冷启动以及快速升温,又能够利用燃料电池电堆的余热帮助发动机快速暖机,简化了系统结构,降低了成本。(The invention relates to the technical field of hybrid electric vehicles, and discloses a hybrid electric vehicle thermal management system and a hybrid electric vehicle. The hybrid electric vehicle heat management system comprises a pump body, an engine and a fuel cell stack which are connected through a pipeline, wherein the engine and the fuel cell stack are connected in parallel and then are connected in series with a water outlet of the pump body through a first three-way valve, and cooling liquid can flow into the engine and/or the fuel cell stack from the water outlet of the pump body after flowing through the first three-way valve and then flows back to the pump body. The hybrid electric vehicle thermal management system provided by the invention can heat the fuel cell stack by utilizing the waste heat of the engine, realizes cold start and rapid temperature rise of the fuel cell stack, and can help the engine to be rapidly warmed up by utilizing the waste heat of the fuel cell stack, thereby simplifying the system structure and reducing the cost.)

1. a hybrid vehicle thermal management system, comprising:

a pump body (1);

The engine (2) and the fuel cell stack (3) are connected in parallel and then connected in series with the water outlet of the pump body (1) through a first three-way valve (6), and cooling liquid can flow into the engine (2) and/or the fuel cell stack (3) from the water outlet of the pump body (1) after flowing through the first three-way valve (6) and then flows back to the pump body (1).

2. hybrid vehicle thermal management system according to claim 1, characterized in that said engine (2) and said fuel cell stack (3) are connected in series with the water inlet of said pump body (1) through a second three-way valve (7).

3. The hybrid vehicle thermal management system of claim 2, further comprising a radiator fan assembly (4), wherein the radiator fan assembly (4) is connected in series between the second three-way valve (7) and the water inlet of the pump body (1).

4. The thermal management system of the hybrid electric vehicle as claimed in claim 3, further comprising a deionization unit (5), wherein the deionization unit (5) is connected in parallel with the radiator fan assembly (4) and then connected in series with the second three-way valve (7) through a third three-way valve (8).

5. The hybrid vehicle thermal management system of claim 1, wherein the engine (2) is an internal combustion engine.

6. Hybrid vehicle thermal management system according to claim 1, characterized in that the pump body (1) is an electronic water pump.

7. The hybrid vehicle thermal management system of claim 4, wherein the first three-way valve (6), the second three-way valve (7), and the third three-way valve (8) are all electrically controlled three-way valves.

8. A hybrid vehicle comprising a hybrid vehicle thermal management system according to any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of hybrid electric vehicles, in particular to a hybrid electric vehicle thermal management system and a hybrid electric vehicle.

background

The hybrid electric vehicle combining the fuel cell and the internal combustion engine can give consideration to the problems of emission, oil consumption, power, cost, endurance mileage and the like.

The temperature is one of the key factors affecting the performance of the fuel cell. At low temperature, various polarizations in the fuel cell are enhanced, ohmic impedance is large, so that the performance of the fuel cell stack is poor, efficiency is reduced, water generated by reaction cannot be discharged in a gaseous state, electrodes are easy to submerge, and when the temperature is below zero, the icing phenomenon can also occur in the fuel cell stack. In the prior art, a special electric heating device needs to be additionally arranged in a thermal management system to ensure successful cold start and rapid temperature rise, but the cost of the thermal management system is increased, and the electric heating device causes energy consumption increase and reduces the efficiency of the thermal management system.

In the warm-up stage of the internal combustion engine, particularly in the cold start at a low temperature, the temperature in the cylinder is low due to the low temperature of the coolant and the low temperature of the lubricating oil, and the like, the combustion is insufficient, and the friction loss is large. In the prior art, the warm-up time is generally shortened as much as possible by additionally arranging a special preheating device or designing a complicated cooling circulation system, an intelligent cooling system and the like so as to reduce oil consumption and emission in the warm-up stage and prolong the service life of an engine, and the cost of the thermal management system is increased by the method, so that the energy consumption is increased, and the efficiency of the thermal management system is reduced.

Therefore, a new thermal management system for a hybrid electric vehicle and a hybrid electric vehicle are needed to solve the above technical problems.

Disclosure of Invention

Based on the above, an object of the present invention is to provide a thermal management system for a hybrid vehicle, which can ensure both cold start and rapid temperature rise of a fuel cell stack and rapid warm-up of an engine, and does not need to provide a special heating device or cooling device, thereby simplifying the structure of the thermal management system for the hybrid vehicle, reducing the cost, avoiding power consumption increase caused by the heating device or cooling device, and improving the efficiency of the thermal management system for the hybrid vehicle.

Another object of the present invention is to provide a hybrid vehicle, wherein the hybrid vehicle thermal management system is applied to ensure both cold start and rapid temperature rise of a fuel cell stack and rapid warm-up of an engine, and simultaneously reduce cost and avoid power consumption increase caused by a heating device or a cooling device.

In order to achieve the purpose, the invention adopts the following technical scheme:

A hybrid vehicle thermal management system comprising:

A pump body;

The engine and the fuel cell stack are connected in parallel and then are connected with the water outlet of the pump body in series through a first three-way valve, and cooling liquid can flow into the engine and/or the fuel cell stack after flowing through the first three-way valve from the water outlet of the pump body and then flows back to the pump body.

Further, the engine and the fuel cell stack are connected in series with the water inlet of the pump body through a second three-way valve.

Further, still include radiator fan assembly, radiator fan assembly establishes ties between the second three-way valve with the water inlet of the pump body.

and the deionization device is connected with the radiator fan assembly in parallel and then is connected with the second three-way valve in series through a third three-way valve.

Further, the engine is an internal combustion engine.

Further, the pump body is an electronic water pump.

Further, the first three-way valve, the second three-way valve and the third three-way valve are all electrically controlled three-way valves.

A hybrid electric vehicle comprises the hybrid electric vehicle thermal management system.

The invention has the beneficial effects that:

The hybrid electric vehicle thermal management system provided by the invention can heat the fuel cell stack by utilizing the waste heat of the engine, realize the cold start and the rapid temperature rise of the fuel cell stack, improve the performance and the efficiency of the fuel cell stack, and can help the engine to be rapidly warmed up by utilizing the waste heat of the fuel cell stack, reduce the heat loss and the friction loss of the engine, reduce the emission, and meanwhile, a special heating device or a cooling device is not required to be arranged, so that the structure of the hybrid electric vehicle thermal management system is simplified, the cost is reduced, the increase of power consumption caused by the heating device or the cooling device is avoided, and the efficiency of the hybrid electric vehicle thermal management system is improved.

According to the hybrid electric vehicle provided by the invention, by applying the thermal management system of the hybrid electric vehicle, the cold start and the rapid temperature rise of the fuel cell stack can be ensured, the rapid warming of the engine can be ensured, the cost is reduced, and the increase of power consumption caused by a heating device or a cooling device is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic diagram of an operation of a thermal management system of a hybrid electric vehicle according to an embodiment of the present invention.

in the figure:

1-a pump body; 2-an engine; 3-a fuel cell stack; 4-a radiator fan assembly; 5-a deionization unit; 6-a first three-way valve; 7-a second three-way valve; 8-third three-way valve.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only or to distinguish between different structures or components and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position", etc. are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

as shown in fig. 1, the embodiment provides a thermal management system for a hybrid vehicle, which can be applied to a hybrid vehicle combining a fuel cell and an internal combustion engine. Specifically, the hybrid electric vehicle thermal management system comprises a pump body 1, an engine 2 and a fuel cell stack 3, wherein the engine 2 and the fuel cell stack 3 are connected in parallel and then connected in series with a water outlet of the pump body 1 through a first three-way valve 6, and a coolant can flow into the engine 2 and/or the fuel cell stack 3 from the water outlet of the pump body 1 through the first three-way valve 6 and then flows back to the pump body 1.

By controlling the opening and closing of the first three-way valve 6, the flow of the coolant into the engine 2 and/or the fuel cell stack 3 can be controlled. When only the engine 2 is operated, the coolant flowing out of the pump body 1 at this time flows only into the engine 2, and cools only the engine 2. When only the fuel cell stack 3 is operated, the coolant flowing out of the pump body 1 at this time flows only into the fuel cell stack 3, and cools only the fuel cell stack 3. When the engine 2 and the fuel cell stack 3 are simultaneously operated, a part of the coolant flowing out of the pump body 1 can flow into the engine 2, and the other part can flow into the fuel cell stack 3, and at this time, the coolant can simultaneously cool the engine 2 and the fuel cell stack 3.

When the engine 2 and the fuel cell stack 3 operate simultaneously, namely in a hybrid mode, two working conditions are included at the time, the fuel cell stack 3 is started when the engine 2 is in a stable operation state under the first working condition, and the engine 2 is started when the fuel cell stack 3 is in a stable operation state under the second working condition. When the engine 2 is in the first working condition, the temperature of the cooling liquid is higher than the initial temperature after the engine 2 stably runs, and the cooling liquid can be used for heating the fuel cell stack 3 in the starting stage, so that the fuel cell stack 3 can quickly reach the ideal working temperature. When the fuel cell stack 3 is in the second working condition, the temperature of the cooling liquid is higher than the initial temperature after the fuel cell stack 3 operates stably, and the cooling liquid can be used for heating the engine 2 in the starting stage, so that the engine 2 is warmed up quickly, the fuel consumption of the engine 2 is reduced, and the emission is optimized.

The hybrid electric vehicle thermal management system provided by the embodiment can heat the fuel cell stack 3 by utilizing the waste heat of the engine 2, realize the cold start and the rapid heating of the fuel cell stack 3, improve the performance and the efficiency of the fuel cell stack 3, and can also utilize the waste heat of the fuel cell stack 3 to help the engine 2 to be rapidly warmed up, reduce the heat loss and the friction loss of the engine 2, reduce the emission, meanwhile, no special heating device or cooling device needs to be arranged, the structure of the hybrid electric vehicle thermal management system is simplified, the cost is reduced, the power consumption increase caused by the heating device or the cooling device is avoided, and the efficiency of the hybrid electric vehicle thermal management system is improved.

Preferably, the engine 2 and the fuel cell stack 3 are connected in series with the water inlet of the pump body 1 through a second three-way valve 7. The coolant flowing out of the engine 2 and/or the fuel cell stack 3 can flow back to the pump body 1 through the second three-way valve 7.

Preferably, the thermal management system of the hybrid vehicle provided by the embodiment further includes a radiator fan assembly 4, and the radiator fan assembly 4 is connected in series between the second three-way valve 7 and the water inlet of the pump body 1. The coolant flowing out of the engine 2 and/or the fuel cell stack 3 can flow into the radiator fan assembly 4 through the second three-way valve 7, and then flows back to the pump body 1 from the radiator fan assembly 4. The radiator fan assembly 4 can reduce the temperature of the cooling liquid and avoid the temperature of the cooling liquid from being too high.

Preferably, the thermal management system of the hybrid vehicle provided by the embodiment further includes a deionization device 5, and after the deionization device 5 and the radiator fan assembly 4 are connected in parallel, the deionization device is connected in series with the second three-way valve 7 through a third three-way valve 8. The coolant flowing out of the engine 2 and/or the fuel cell stack 3 can flow into the deionization unit 5 and then flow back into the pump body 1. The deionization unit 5 is capable of absorbing charged ions, ensuring that the coolant is at a low conductivity level. Note that the coolant flows into the deionization apparatus 5 only at the initial start-up stage of the hybrid vehicle, and the coolant does not flow into the deionization apparatus 5 any more after either of the engine 2 and the fuel cell stack 3 is stably operated. By controlling the opening and closing of the second three-way valve 7 and the third three-way valve 8, the flow of the coolant into the radiator fan assembly 4 or into the deionization apparatus 5 can be controlled.

specifically, in the present embodiment, the engine 2 is an internal combustion engine. The pump body 1 is an electronic water pump. The first three-way valve 6, the second three-way valve 7 and the third three-way valve 8 are all electric control three-way valves.

the thermal management system of the hybrid electric vehicle provided by the embodiment has three working modes, which are specifically described as follows:

(1) Operating mode one with engine 2 only running

When the engine 2 is in an initial starting stage, the engine 2 is in a small circulation state at the moment, the cooling liquid flowing out of the pump body 1 enters the engine 2 after passing through the first three-way valve 6, flows out of the engine 2 after absorbing heat, flows into the deionization device 5 after passing through the second three-way valve 7 and the third three-way valve 8, and flows back to the pump body 1 after the deionization of the cooling liquid is completed, so that the small circulation is completed;

When the engine 2 is in a stable operation stage, the engine 2 is in a large circulation state at the moment, the cooling liquid flowing out of the pump body 1 enters the engine 2 after passing through the first three-way valve 6, flows out of the engine 2 after absorbing heat, flows into the radiator fan assembly 4 after passing through the second three-way valve 7 and the third three-way valve 8, and flows back to the pump body 1 after dissipating heat of the cooling liquid, so that the large circulation is completed.

(2) The second working mode is that only the fuel cell stack 3 operates

when the fuel cell stack 3 is in an initial starting stage, the fuel cell stack 3 is in a small circulation state at the moment, cooling liquid flowing out of the pump body 1 enters the fuel cell stack 3 after passing through the first three-way valve 6, the cooling liquid flows out of the fuel cell stack 3 after absorbing heat, flows into the deionization device 5 after passing through the second three-way valve 7 and the third three-way valve 8, and flows back to the pump body 1 after the deionization of the cooling liquid is finished, so that the small circulation is finished;

When the fuel cell stack 3 is in a stable operation stage, the fuel cell stack 3 is in a large circulation state at the moment, the cooling liquid flowing out of the pump body 1 enters the fuel cell stack 3 after passing through the first three-way valve 6, the cooling liquid flows out of the fuel cell stack 3 after absorbing heat, flows into the radiator fan assembly 4 after passing through the second three-way valve 7 and the third three-way valve 8, and the heat of the cooling liquid flows back to the pump body 1 after being dissipated, so that the large circulation is completed.

(3) The third working mode is that the engine 2 and the fuel cell stack 3 run simultaneously

When the engine 2 is in a stable operation state, the fuel cell stack 3 is started, the temperature of the cooling liquid is higher than the initial temperature at the moment, the cooling liquid can be used for heating the fuel cell stack 3 in the starting stage, one part of the cooling liquid flowing out of the pump body 1 enters the fuel cell stack 3 after passing through the first three-way valve 6, the other part of the cooling liquid enters the engine 2, and the cooling liquid flows out of the engine 2 and the fuel cell stack 3, flows into the radiator fan assembly 4 through the second three-way valve 7 and the third three-way valve 8 and finally flows back to the pump body 1;

when the fuel cell stack 3 is in a stable operation state, the engine 2 is started, the temperature of the cooling liquid is higher than the initial temperature at the moment, the cooling liquid can be used for heating the engine 2 in the starting stage, one part of the cooling liquid flowing out of the pump body 1 enters the engine 2 after passing through the first three-way valve 6, the other part of the cooling liquid enters the fuel cell stack 3, and the cooling liquid flows out of the engine 2 and the fuel cell stack 3, flows into the radiator fan assembly 4 through the second three-way valve 7 and the third three-way valve 8 and finally flows back to the pump body 1.

The embodiment also provides a hybrid electric vehicle which comprises the hybrid electric vehicle thermal management system. The hybrid electric vehicle can ensure the cold start and the rapid temperature rise of the fuel cell stack 3 and the rapid warming of the engine 2 by applying the thermal management system of the hybrid electric vehicle, simultaneously reduces the cost and avoids the increase of power consumption caused by a heating device or a cooling device.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.