Thermal management system and fuel cell system
By installing a second coolant filter in the heating branch, the problem of unfiltered coolant in the heating branch in the prior art is solved, realizing all-round filtration of coolant, extending the life of fuel cell stack and reducing the size of thermal management system.
Patent Information
- Application Number
- CN202422375020.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In existing thermal management systems, the coolant flow loop only has filters in the heat dissipation branch, which cannot filter the coolant in the heating branch. This results in unfiltered coolant entering the fuel cell stack and reducing the lifespan of the fuel cell stack.
A second coolant filter is installed in the heating branch, inside the outlet pipe at the output end of the heater, to filter the coolant in the heating branch. Combined with the first coolant filter in the heat dissipation branch, it achieves all-round filtration of the coolant.
To ensure the lifespan of the fuel cell stack, reduce the footprint of the thermal management system, and increase the volumetric power density of the system.
Smart Images
Figure CN223471616U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of fuel cell, in particular to a thermal management system and a fuel cell system. BACKGROUND
[0002] A large amount of heat is generated in the operation process of the fuel cell system, if the system cannot be cooled in time, the temperature of the system will be higher and higher, which will reduce the service life of the fuel cell system, and even damage the system. Through the thermal management system of the fuel cell, the cooling liquid circulates in the system, which can solve the problem of too high temperature of the system, and also can heat the cooling liquid through the thermal management system when the temperature of the cooling liquid is too low.
[0003] However, in the cooling liquid flow circuit of the current thermal management system, only a filter is usually arranged in the heat dissipation branch, the cooling liquid in the heating branch cannot be filtered, which leads to that the unfiltered cooling liquid enters the stack, and reduces the service life of the stack. CONTENT OF THE INVENTION
[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a thermal management system and a fuel cell system, which can not only filter the cooling liquid in the heat dissipation branch, but also filter the cooling liquid in the heating branch, so as to ensure the service life of the fuel cell stack.
[0005] The thermal management system according to the first aspect of the present application comprises:
[0006] a fuel cell stack;
[0007] a thermostat, an input end of the thermostat being connected with a cooling liquid output end of the fuel cell stack;
[0008] a water pump;
[0009] a heat dissipation branch, the heat dissipation branch being provided with a first cooling liquid filter, the first cooling liquid filter being used for filtering the cooling liquid in the heat dissipation branch; an input end of the heat dissipation branch being connected with a first output end of the thermostat; an output end of the heat dissipation branch being connected with an input end of the water pump;
[0010] a heating branch, the heating branch comprising a heater and a second cooling liquid filter, an input end of the heater being connected with a second output end of the thermostat, an output end of the heater being connected with an input end of the water pump; the second cooling liquid filter being installed inside a water outlet pipeline of the output end of the heater, the second cooling liquid filter being used for filtering the cooling liquid output by the heater.
[0011] According to the heat management system provided in the embodiments of the present application, the following beneficial effects are achieved: when the temperature of the cooling liquid of the fuel cell stack is too high, the cooling liquid at the output end of the fuel cell stack flows into the heat dissipation branch through the thermostat, is heat-dissipated in the heat dissipation branch, and thus the temperature of the cooling liquid is reduced. After the temperature of the cooling liquid is reduced, the cooling liquid enters the fuel cell stack through the water pump. In this process, the first cooling liquid filter is used to filter the cooling liquid in the heat dissipation branch, so as to reduce the impurities in the cooling liquid. When the temperature of the cooling liquid of the fuel cell stack is too low, the cooling liquid at the output end of the fuel cell stack flows into the heating branch through the thermostat, and the cooling liquid is heated by the heater, so as to increase the temperature of the cooling liquid. In this process, the second cooling liquid filter is used to filter the cooling liquid output by the heater, so as to reduce the impurities in the cooling liquid. In this way, the heat management system provided in the embodiments of the present application not only filters the cooling liquid in the heat dissipation branch, but also filters the cooling liquid in the heating branch, so as to ensure the service life of the fuel cell stack. In addition, since the second cooling liquid filter is installed in the water outlet pipeline at the output end of the heater, the occupied volume of the heat management system can be reduced.
[0012] According to some embodiments of the present application, the second cooling liquid filter comprises a filter screen, and the filter screen is detachably installed in the water outlet pipeline.
[0013] According to some embodiments of the present application, the second cooling liquid filter further comprises a sealing ring, an inner side wall of the water outlet pipeline is provided with an annular protrusion, the annular protrusion is provided with an annular groove, the sealing ring is installed in the annular groove, the filter screen is clamped on the annular protrusion, and the filter screen abuts against the sealing ring.
[0014] According to some embodiments of the present application, the second cooling liquid filter further comprises an auxiliary installation sleeve, an inner side wall of the water outlet pipeline is provided with a first threaded structure, an outer side wall of the auxiliary installation sleeve is provided with a second threaded structure matched with the first threaded structure, the auxiliary installation sleeve is installed in the water outlet pipeline, the auxiliary installation sleeve abuts against the filter screen, and the first threaded structure is threadedly connected with the second threaded structure.
[0015] According to some embodiments of the present application, the second cooling liquid filter further comprises an elastic washer, and the auxiliary installation sleeve abuts against the filter screen through the elastic washer.
[0016] According to some embodiments of the present application, the heat dissipation branch comprises a heat dissipation device, an input end of the heat dissipation device serves as an input end of the heat dissipation branch, an output end of the heat dissipation device is connected with an input end of the first cooling liquid filter, and an output end of the first cooling liquid filter serves as an output end of the heat dissipation branch.
[0017] According to some embodiments of the present application, further comprising an expansion water tank, an input end of the expansion water tank is connected with an output end of the cooling liquid of the fuel cell stack, and an output end of the expansion water tank is connected between an input end of the first cooling liquid filter and an output end of the radiator.
[0018] According to some embodiments of the present application, further comprising a deionizer, an input end of the expansion water tank is connected with an output end of the cooling liquid of the fuel cell stack through the deionizer.
[0019] According to some embodiments of the present application, further comprising an intercooler, an input end of the intercooler is connected with an input end of the cooling liquid of the fuel cell stack, and an output end of the intercooler is connected with an output end of the cooling liquid of the fuel cell stack.
[0020] The second aspect of the present application is a fuel cell system, comprising the thermal management system according to any one of the embodiments of the first aspect of the present application.
[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS
[0022] The present application will be further described with reference to the accompanying drawings and embodiments, wherein:
[0023] Figure 1 A module block diagram of the thermal management system according to the embodiments of the present application;
[0024] Figure 2 A structure diagram of the outlet pipe of the heater according to the embodiments of the present application;
[0025] Figure 3 A structure diagram of the outlet pipe of the heater according to the embodiments of the present application; Figure 2 A sectional view of the outlet pipe of the heater according to the embodiments of the present application;
[0026] Figure 4 A sectional view of the outlet pipe of the heater according to the embodiments of the present application; Figure 2 A exploded view of the outlet pipe of the heater and the second cooling liquid filter according to the embodiments of the present application.
[0027] REFERENCE NUMERALS:
[0028] fuel cell stack 110; thermostat 120; water pump 130; radiator 140; heater 150; outlet pipe 151; convex ring-shaped part 152; second cooling liquid filter 160; filter screen 161; auxiliary mounting sleeve 162; sealing ring 163; elastic washer 164; first cooling liquid filter 170; deionizer 180; expansion water tank 190; intercooler 200. DETAILED DESCRIPTION
[0029] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0030] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.
[0031] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0032] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0033] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.
[0034] In the coolant flow circuit of the current thermal management system, filters are usually only installed in the heat dissipation branch. Because the filter will increase the volume of the thermal management system, in order to ensure the volume power density of the fuel cell system, the relevant technology will not set a filter in the heating branch. Therefore, the coolant in the heating branch cannot be filtered, resulting in unfiltered coolant entering the fuel cell stack, resulting in a reduced life of the fuel cell stack.
[0035] Based on this, the application provides a heat management system and a fuel cell system. The heat management system not only filters the cooling liquid in the heat dissipation branch, but also filters the cooling liquid in the heating branch, ensures the service life of the fuel cell stack, and the second cooling liquid filter is installed in the water outlet pipeline of the output end of the heater, so that the occupied volume of the heat management system can be reduced, thereby ensuring the volume power density of the fuel cell system.
[0036] Referring to Figures 1 to 4 The first aspect of the application provides a heat management system, comprising a fuel cell stack, a thermostat 120, a water pump 130, a heat dissipation branch and a heating branch. The input end of the thermostat 120 is connected with the cooling liquid output end of the fuel cell stack 110. The heat dissipation branch is provided with a first cooling liquid filter 170, which is used for filtering the cooling liquid in the heat dissipation branch. The input end of the heat dissipation branch is connected with the first output end of the thermostat 120. The output end of the heat dissipation branch is connected with the input end of the water pump 130.
[0037] The heating branch comprises a heater 150 and a second cooling liquid filter 160. The input end of the heater 150 is connected with the second output end of the thermostat 120. The output end of the heater 150 is connected with the input end of the water pump 130. The second cooling liquid filter 160 is installed in the water outlet pipeline 151 of the output end of the heater 150. The second cooling liquid filter 160 is used for filtering the cooling liquid output by the heater 150.
[0038] The heat management system of the application is applied to a fuel cell system. When the temperature of the cooling liquid of the fuel cell stack 110 is too high, the cooling liquid of the cooling liquid output end of the fuel cell stack 110 flows into the heat dissipation branch through the thermostat 120, is cooled in the heat dissipation branch, and then enters the fuel cell stack 110 after passing through the water pump 130. In this process, the first cooling liquid filter 170 is used for filtering the cooling liquid in the heat dissipation branch to reduce impurities in the cooling liquid. When the temperature of the cooling liquid of the fuel cell stack 110 is too low, the cooling liquid of the cooling liquid output end of the fuel cell stack 110 flows into the heating branch through the thermostat 120, is heated by the heater 150 to increase the temperature of the cooling liquid. In this process, the second cooling liquid filter 160 is used for filtering the cooling liquid output by the heater 150 to reduce impurities in the cooling liquid. Thus, the heat management system of the application not only filters the cooling liquid in the heat dissipation branch, but also filters the cooling liquid in the heating branch, ensures the service life of the fuel cell stack 110, and since the second cooling liquid filter 160 is installed in the water outlet pipeline 151 of the output end of the heater 150, the occupied volume of the heat management system can be reduced.
[0039] It is worth noting that the heater 150 is a PTC water heater 150.
[0040] It can be understood that, with reference to Figure 2 , Figure 3 and Figure 4 , the second cooling liquid filter 160 comprises a filter screen 161 which is detachably installed on the water outlet pipe 151. The filter screen 161 can filter impurities in the cooling liquid, thereby avoiding the impurities from entering the fuel cell stack 110 and ensuring the service life of the fuel cell stack 110.
[0041] It can be understood that the second cooling liquid filter 160 of the embodiment of the application further comprises a sealing ring 163, the inner side wall of the water outlet pipe 151 is provided with an annular protrusion, the annular protrusion is provided with an annular groove, the sealing ring 163 is installed in the annular groove, the filter screen 161 is clamped on the annular protrusion and abuts against the sealing ring 163. The annular protrusion is in the shape of a circular ring, which can reduce the obstruction of the annular protrusion to the flow of the cooling liquid. The annular groove is oriented in the radial direction of the water outlet pipe 151, and the sealing ring 163 is used to seal the gap between the annular protrusion and the filter screen 161.
[0042] It can be understood that, with reference to Figure 3 and Figure 4 , the second cooling liquid filter 160 of the embodiment of the application further comprises an auxiliary installation sleeve 162, the inner side wall of the water outlet pipe 151 is provided with a first threaded structure, the outer side wall of the auxiliary installation sleeve 162 is provided with a second threaded structure which matches the first threaded structure, the auxiliary installation sleeve 162 is installed in the interior of the water outlet pipe 151, and the auxiliary installation sleeve 162 abuts against the filter screen 161, and the first threaded structure is threadedly connected with the second threaded structure. The auxiliary installation sleeve 162 abuts against the filter screen 161 to fix the filter screen 161 in the interior of the water outlet pipe 151, thereby avoiding the filter screen 161 from changing position due to the impact of the cooling liquid. Moreover, the auxiliary installation sleeve 162 is threadedly connected with the first threaded structure of the inner side wall of the water outlet pipe 151 through the second threaded structure, so that the auxiliary installation sleeve 162 can be stably installed in the interior of the water outlet pipe 151 and can be detached, thereby facilitating the maintenance or replacement of the filter screen 161.
[0043] It is worth noting that the auxiliary installation sleeve 162 is in a hollow structure, so that the cooling liquid can flow through the auxiliary installation sleeve 162, thereby avoiding the auxiliary installation sleeve 162 from obstructing the flow of the cooling liquid.
[0044] It can be understood that, with reference to Figure 3 and Figure 4The second cooling liquid filter 160 further comprises an elastic washer 164, the auxiliary mounting sleeve 162 abuts against the filter screen 161 through the elastic washer 164. The elastic washer 164 can be made of silica gel, and the elastic washer 164 can reduce the shaking of the filter screen 161 caused by the flow of the cooling liquid.
[0045] When the filter screen 161 is installed, the sealing ring 163 is placed in the annular groove of the annular protrusion, then the filter screen 161 is placed on one side of the sealing ring 163, the elastic washer 164 is placed on one side of the filter screen 161, then the auxiliary mounting sleeve 162 is placed inside the water outlet pipe 151, and the auxiliary mounting sleeve 162 is rotated to approach the elastic washer 164 until the auxiliary mounting sleeve 162 cannot be twisted, because the elastic washer 164 is compressed and has a counterforce, under the cooperation of the counterforce of the elastic washer 164 and the auxiliary mounting sleeve 162, the filter screen 161 can be very firmly installed in the water outlet pipe 151.
[0046] It can be understood that, referring to Figure 1 , the heat dissipation branch comprises the radiator 140, the input end of the radiator 140 is the input end of the heat dissipation branch, the output end of the radiator 140 is connected with the input end of the first cooling liquid filter 170, and the output end of the first cooling liquid filter 170 is the output end of the heat dissipation branch.
[0047] It can be understood that, referring to Figure 1 , according to some embodiments of the present application, the fuel cell system further comprises an expansion tank 190, the input end of the expansion tank 190 is connected with the cooling liquid output end of the fuel cell stack 110, and the output end of the expansion tank 190 is connected between the input end of the first cooling liquid filter 170 and the output end of the radiator 140. The expansion tank 190 is used for liquid supplement, pressure stabilization and gas discharge of the heat dissipation branch.
[0048] It can be understood that, referring to Figure 1 , according to some embodiments of the present application, the fuel cell system further comprises a deionizer 180, the input end of the expansion tank 190 is connected with the cooling liquid output end of the fuel cell stack 110 through the deionizer 180. The deionizer 180 can remove ions in the cooling liquid, so as to reduce the conductivity of the cooling liquid.
[0049] It can be understood that, according to some embodiments of the present application, the fuel cell system further comprises an intercooler 200, the input end of the intercooler 200 is connected with the cooling liquid input end of the fuel cell stack 110, and the output end of the intercooler 200 is connected with the cooling liquid output end of the fuel cell stack 110.
[0050] The second aspect of the present application is a fuel cell system, comprising the thermal management system according to any one of the embodiments of the first aspect of the present application.
[0051] Since the fuel cell system comprises the thermal management system as any one of the embodiments of the first aspect of the present application, the corresponding content of the thermal management system in the embodiments mentioned in the first aspect is also applicable to the fuel cell system in the embodiments mentioned in the second aspect, and has the same implementation principle and technical effects. To avoid redundancy of the description, it will not be described in detail here.
[0052] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
Claims
1. A thermal management system, characterized by, The application relates to a heat management system for a fuel cell vehicle. The heat management system comprises: a fuel cell stack; a thermostat, an input end of the thermostat being connected with a cooling liquid output end of the fuel cell stack; a water pump; a heat dissipation branch, the heat dissipation branch being provided with a first cooling liquid filter for filtering cooling liquid in the heat dissipation branch, an input end of the heat dissipation branch being connected with a first output end of the thermostat, and an output end of the heat dissipation branch being connected with an input end of the water pump; 2. The thermal management system of claim 1, wherein, a heating branch, the heating branch comprising a heater and a second cooling liquid filter, an input end of the heater being connected with a second output end of the thermostat, an output end of the heater being connected with an input end of the water pump, and the second cooling liquid filter being arranged in a water outlet pipeline of the output end of the heater and used for filtering cooling liquid output by the heater.
3. The thermal management system of claim 2, wherein, The second cooling liquid filter comprises a filter screen, and the filter screen is detachably arranged in the water outlet pipeline.
4. The thermal management system of claim 3, wherein, The second cooling liquid filter further comprises a sealing ring, an inner side wall of the water outlet pipeline is provided with an annular protrusion, the annular protrusion is provided with an annular groove, the sealing ring is arranged in the annular groove, and the filter screen is clamped on the annular protrusion and abuts against the sealing ring.
5. The thermal management system of claim 4, wherein, The second cooling liquid filter further comprises an auxiliary mounting sleeve, an inner side wall of the water outlet pipeline is provided with a first threaded structure, an outer side wall of the auxiliary mounting sleeve is provided with a second threaded structure matched with the first threaded structure, the auxiliary mounting sleeve is arranged in the water outlet pipeline, the auxiliary mounting sleeve abuts against the filter screen, and the first threaded structure is threadedly connected with the second threaded structure.
6. The thermal management system of claim 1, wherein, The second cooling liquid filter further comprises an elastic gasket, and the auxiliary mounting sleeve abuts against the filter screen through the elastic gasket.
7. The thermal management system of claim 6, wherein, The heat dissipation branch comprises a radiator, an input end of the radiator is used as an input end of the heat dissipation branch, an output end of the radiator is connected with an input end of the first cooling liquid filter, and an output end of the first cooling liquid filter is used as an output end of the heat dissipation branch.
8. The thermal management system of claim 7, wherein, The heat management system further comprises an expansion water tank, an input end of the expansion water tank is connected with the cooling liquid output end of the fuel cell stack, and an output end of the expansion water tank is connected between the input end of the first cooling liquid filter and the output end of the radiator.
9. The thermal management system of claim 1, wherein, The heat management system further comprises a deionizer, the input end of the expansion water tank is connected with the cooling liquid output end of the fuel cell stack through the deionizer.
10. A fuel cell system characterized by comprising: The heat management system further comprises an intercooler, an input end of the intercooler is connected with a cooling liquid input end of the fuel cell stack, and an output end of the intercooler is connected with a cooling liquid output end of the fuel cell stack. The heat management system comprises the heat management system according to any one of claims 1 to 9.