A fuel cell stack module

Abstract

The utility model relates to fuel cell technical field discloses a kind of fuel cell stack module, distribution end plate is connected with two groups of stack components respectively, and first distribution pipe component, second distribution pipe component and hydrogen circulation pipe component are connected on distribution end plate, first distribution pipe component includes first mounting plate, air input pipe and cooling liquid input pipe, air import pressure sensor is equipped on air input pipe, second distribution pipe component includes second mounting plate, air output pipe and cooling liquid output pipe, air outlet pressure sensor is equipped on air output pipe, hydrogen circulation pipe component includes third mounting plate, hydrogen input pipe and hydrogen circulation backflow pipe, air compressor purge inlet joint and the air purge inlet joint connected with large flow fan are equipped on rear end plate, and box ventilation outlet is equipped on upper cover plate;The utility model satisfies large flow purge demand, reduces the use of silica gel pipe, improves the reliability and security of stack module.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a fuel cell stack module. Background Technology

[0002] In existing dual-stack fuel cell modules, fluid distribution heads are typically mounted on the stack mounting surface, and silicone tubing is then secured to the distribution heads using clamps or other fasteners. External fluid lines are then connected through the silicone tubing. However, silicone tubing is prone to aging, and clamp torque is easily reduced, especially in hydrogen lines, posing a risk of leakage. Furthermore, air purging of the stack enclosure is usually performed via air compressor branch lines, which is insufficient to meet the high-flow-rate purging requirements of ships. Sensors are typically distributed throughout the enclosure, not only occupying space and increasing wiring complexity, but more importantly, within a closed enclosure where flammable gases may be present, the dispersed electrical components increase the risk of ignition sources, failing to meet marine explosion-proof requirements. Utility Model Content

[0003] The purpose of this invention is to provide a fuel cell stack module that meets the requirements of high-flow purging, reduces the use of silicone tubing, and improves the reliability and safety of the stack module.

[0004] To achieve the above objectives, this utility model provides a fuel cell stack module, including a package housing with two sets of stack assemblies stacked vertically. The package housing includes a distribution end plate, a rear end plate, a left end plate, a right end plate, an upper cover plate, and a lower cover plate. The distribution end plate is connected to both sets of stack assemblies. The distribution end plate has multiple internal flow channels. A first distribution pipe assembly, a second distribution pipe assembly, and a hydrogen circulation pipe assembly are connected to the distribution end plate. The first distribution pipe assembly includes a first mounting plate and an air input pipe and a coolant input pipe disposed on the first mounting plate. An air inlet pressure sensor is provided on the pipe. The second distribution pipe assembly includes a second mounting plate and an air output pipe and a coolant output pipe disposed on the second mounting plate. An air outlet pressure sensor is provided on the air output pipe. The hydrogen circulation pipe assembly includes a third mounting plate and a hydrogen input pipe and a hydrogen circulation return pipe disposed on the third mounting plate. The first mounting plate, the second mounting plate, and the third mounting plate are conductively connected to the distribution end plate. An air compressor purge inlet connector and an air purge inlet connector connected to a high-flow fan are provided on the rear end plate. A housing ventilation outlet is provided on the upper cover plate.

[0005] As a preferred embodiment of this utility model, the coolant inlet pipe includes an inlet main pipe and a hydrogen heat exchanger coolant inlet pipe, an intercooler coolant inlet pipe, and a deionizer coolant inlet pipe connected to the inlet main pipe; the coolant outlet pipe includes an outlet main pipe and a hydrogen heat exchanger coolant outlet pipe, an intercooler coolant outlet pipe, a deionizer coolant outlet pipe, and a fuel cell stack coolant small circulation outlet pipe connected to the outlet main pipe.

[0006] As a preferred embodiment of this utility model, the input main pipe is equipped with an inlet temperature and pressure integrated sensor; the output main pipe is equipped with an outlet temperature sensor and a one-way exhaust valve; and the air input pipe is equipped with an air inlet temperature sensor.

[0007] As a preferred embodiment of this utility model, the hydrogen input pipe is provided with a hydrogen pressure relief outlet.

[0008] As a preferred embodiment of this utility model, the lower cover plate is provided with a liquid drainage outlet and a transparent window for observing the liquid accumulation.

[0009] As a preferred embodiment of this utility model, a pressure relief valve is provided on the rear end plate.

[0010] As a preferred embodiment of this utility model, the left end plate or the right end plate is provided with a drain pipe.

[0011] As a preferred embodiment of this utility model, both the air inlet pipe and the air outlet pipe are equipped with throttle valves.

[0012] As a preferred embodiment of this utility model, a hydrogen concentration sensor is provided on the upper cover plate.

[0013] In a preferred embodiment of this invention, the hydrogen circulation pipe assembly is disposed between the first distribution pipe assembly and the second distribution pipe assembly.

[0014] Compared with the prior art, the fuel cell stack module of this utility model has the following advantages:

[0015] In this invention, the distribution end plate connects air, hydrogen, and coolant to two sets of fuel cell stack assemblies through corresponding flow channels via a first distribution pipe assembly, a second distribution pipe assembly, and a hydrogen circulation pipe assembly. This achieves efficient and centralized distribution and collection of fluids, reduces the use of silicone tubing, and improves operational safety. Furthermore, the rear end plate is designed with two independent purging inlets and incorporates a high-flow-rate fan for purging, meeting the high-flow-rate purging requirements of fuel cells in marine applications. The pressure sensor is directly integrated into the distribution pipe, resulting in a compact layout and easy monitoring and management. This invention improves the reliability and safety of the fuel cell stack module. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0017] Figure 1 A front view of a fuel cell stack module provided by this utility model;

[0018] Figure 2 A bottom view of a fuel cell stack module provided by this utility model;

[0019] Figure 3 A schematic diagram of the structure of the first distribution pipe assembly and the second distribution pipe assembly provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the hydrogen circulation pipe assembly provided by this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the two sets of fuel cell stacks provided by this utility model;

[0022] Figure 6 A structural diagram of the packaging box provided by this utility model;

[0023] In the figure, the components are: encapsulation box 1; distribution end plate 11; rear end plate 12; air compressor purge inlet connector 121; air purge inlet connector 122; pressure relief valve 123; left end plate 13; right end plate 14; drain pipe 141; upper cover plate 15; enclosure ventilation outlet 151; hydrogen concentration sensor 152; lower cover plate 16; liquid drain outlet 161; transparent window 162; fuel cell stack assembly 2; first distribution pipe assembly 3; first mounting plate 31; air input pipe 32; air inlet pressure sensor 321; inlet temperature sensor 322; coolant input pipe 33; input main pipe 331; hydrogen heat exchanger coolant input pipe 332; intercooler coolant. Input pipe 333; Deionizer coolant input pipe 334; Inlet temperature and pressure integrated sensor 335; Second distribution pipe assembly 4; Second mounting plate 41; Air output pipe 42; Air outlet pressure sensor 421; Coolant output pipe 43; Output main pipe 431; Hydrogen heat exchanger coolant output pipe 432; Intercooler coolant output pipe 433; Deionizer coolant output pipe 434; Fuel cell stack coolant small circulation output pipe 435; Outlet temperature sensor 436; One-way exhaust valve 437; Hydrogen circulation pipe assembly 5; Third mounting plate 51; Hydrogen input pipe 52; Hydrogen pressure relief outlet 521; Hydrogen circulation return pipe 53; Throttle valve 6. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figures 1 to 6 As shown, a preferred embodiment of the present invention provides a fuel cell stack module, comprising a housing 1 with two stack assemblies 2 stacked vertically, namely an upper stack assembly 2 and a lower stack assembly 2. The housing 1 includes a distribution end plate 11, a rear end plate 12, a left end plate 13, a right end plate 14, an upper cover plate 15, and a lower cover plate 16. The distribution end plate 11 is connected to both stack assemblies 2. The distribution end plate 11 has multiple flow channels and is connected to a first distribution pipe assembly 3, a second distribution pipe assembly 4, and a hydrogen circulation pipe assembly 5. The first distribution pipe assembly 3 includes a first mounting plate 31 and an air input pipe 32 and a coolant input pipe 33 disposed on the first mounting plate 31. The air inlet pipe 32 is equipped with an air inlet pressure sensor 321. The second distribution pipe assembly 4 includes a second mounting plate 41 and an air outlet pipe 42 and a coolant outlet pipe 43 disposed on the second mounting plate 41. The air outlet pipe 42 is equipped with an air outlet pressure sensor 421. The hydrogen circulation pipe assembly 5 includes a third mounting plate 51 and a hydrogen inlet pipe 52 and a hydrogen circulation return pipe 53 disposed on the third mounting plate 51. The first mounting plate 31, the second mounting plate 41 and the third mounting plate 51 are conductively connected to the distribution end plate 11. The rear end plate 12 is equipped with an air compressor purge inlet connector 121 and an air purge inlet connector 122 connected to a high-flow fan. The upper cover plate 15 is equipped with a housing ventilation outlet 151.

[0027] In this invention, the distribution end plate 11 connects air, hydrogen, and coolant to two sets of fuel cell stack assemblies 2 through the first distribution pipe assembly 3, the second distribution pipe assembly 4, and the hydrogen circulation pipe assembly 5, achieving efficient and centralized distribution and collection of fluids, reducing the use of silicone tubing, and improving safety. Furthermore, the rear end plate 12 is designed with two independent purging inlets and a high-flow-rate fan for purging, meeting the high-flow-rate purging requirements of fuel cells in marine applications. The pressure sensor is directly integrated into the distribution pipe, resulting in a compact layout and easy monitoring and management. This invention improves the reliability and safety of the fuel cell stack module.

[0028] For example, the coolant inlet pipe 33 includes an inlet manifold 331 and a hydrogen heat exchanger coolant inlet pipe 332, an intercooler coolant inlet pipe 333, and a deionizer coolant inlet pipe 334 connected to the inlet manifold 331; the coolant outlet pipe 43 includes an outlet manifold 431 and a hydrogen heat exchanger coolant outlet pipe 432, an intercooler coolant outlet pipe 433, a deionizer coolant outlet pipe 434, and a fuel cell stack coolant small circulation outlet pipe 435 connected to the outlet manifold 431, thereby realizing precise supply and collection of coolant for the core components of the fuel cell stack and the auxiliary thermal management system, with a high degree of system integration.

[0029] Furthermore, the input manifold 331 is equipped with an inlet temperature and pressure integrated sensor 335; the output manifold 431 is equipped with an outlet temperature sensor 436 and a one-way exhaust valve 437; the air input pipe 32 is equipped with an air inlet temperature sensor 322 to monitor the coolant inlet temperature and pressure, the coolant final outlet temperature, and the air temperature entering the fuel cell stack assembly 2, ensuring the stability of the fuel cell stack module operation; the one-way exhaust valve 437 can automatically discharge the gas accumulated in the output manifold 431 to prevent air resistance from causing a decrease in cooling efficiency. Both the air inlet pressure sensor 321 and the air outlet pressure sensor 421 are explosion-proof pressure sensors to improve safety performance.

[0030] To enhance safety, the hydrogen inlet pipe 52 is provided with a hydrogen pressure relief outlet 521.

[0031] Furthermore, the lower cover plate 16 is provided with a liquid drain outlet 161 for draining the liquid accumulated inside the packaging box 1 and a transparent window 162 for observing the liquid accumulation. The transparent window 162 allows the operator to directly observe the liquid accumulation without opening the packaging box 1, which facilitates maintenance decision-making.

[0032] For example, the rear end plate 12 is equipped with a pressure relief valve 123, which automatically relieves pressure when the pressure in the encapsulation box 1 rises abnormally, protecting the fuel cell module and personnel safety.

[0033] In this embodiment, the right end plate 14 is provided with a drain pipe 141 for draining the condensate generated after the fuel cell stack is running or shut down and purged. The two ports of the drain pipe 141 are respectively connected to the bottom positions of the upper and lower fuel cell stack assemblies 2 on the right end plate 14.

[0034] Specifically, both the air inlet pipe 32 and the air outlet pipe 42 are equipped with throttle valves 6, which can finely adjust the airflow entering the fuel cell stack module and optimize the fuel cell stack reaction efficiency.

[0035] Furthermore, the upper cover plate 15 is equipped with a hydrogen concentration sensor 152 to monitor the hydrogen concentration in the enclosed space of the box in real time, thereby improving operational safety.

[0036] In this embodiment, the hydrogen circulation pipe assembly 5 is disposed between the first distribution pipe assembly 3 and the second distribution pipe assembly 4, which reduces pipe crossing and facilitates installation and maintenance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A fuel cell stack module, comprising a housing having two sets of stack components stacked vertically, characterized in that, The enclosure includes a distribution end plate, a rear end plate, a left end plate, a right end plate, an upper cover plate, and a lower cover plate. The distribution end plate is connected to two sets of fuel cell stack assemblies. The distribution end plate has multiple flow channels built in. A first distribution pipe assembly, a second distribution pipe assembly, and a hydrogen circulation pipe assembly are connected to the distribution end plate. The first distribution pipe assembly includes a first mounting plate and an air input pipe and a coolant input pipe disposed on the first mounting plate. An air inlet pressure sensor is provided on the air input pipe. The second distribution pipe assembly includes a second mounting plate and an air output pipe and a coolant output pipe disposed on the second mounting plate. An air outlet pressure sensor is provided on the air output pipe. The hydrogen circulation pipe assembly includes a third mounting plate and a hydrogen input pipe and a hydrogen circulation return pipe disposed on the third mounting plate. The first mounting plate, the second mounting plate, and the third mounting plate are electrically connected to the distribution end plate. The rear end plate is provided with an air compressor purge inlet connector and an air purge inlet connector connected to a high-flow fan. The upper cover plate is provided with an enclosure ventilation outlet.

2. The fuel cell stack module as described in claim 1, characterized in that, The coolant inlet pipe includes an inlet main pipe and a hydrogen heat exchanger coolant inlet pipe, an intercooler coolant inlet pipe, and a deionizer coolant inlet pipe connected to the inlet main pipe; the coolant outlet pipe includes an outlet main pipe and a hydrogen heat exchanger coolant outlet pipe, an intercooler coolant outlet pipe, a deionizer coolant outlet pipe, and a fuel cell stack coolant small circulation outlet pipe connected to the outlet main pipe.

3. The fuel cell stack module as described in claim 2, characterized in that, The input manifold is equipped with an integrated inlet temperature and pressure sensor; the output manifold is equipped with an outlet temperature sensor and a one-way exhaust valve; the air input pipe is equipped with an air inlet temperature sensor; and both the air inlet pressure sensor and the air outlet pressure sensor are explosion-proof pressure sensors.

4. The fuel cell stack module as described in claim 1, characterized in that, The hydrogen input pipe is equipped with a hydrogen pressure relief outlet.

5. The fuel cell stack module as described in claim 1, characterized in that, The lower cover plate is provided with a drainage outlet for accumulating liquid and a transparent window for observing the accumulated liquid.

6. The fuel cell stack module as described in claim 1, characterized in that, The rear end plate is equipped with a pressure relief valve.

7. The fuel cell stack module as described in claim 1, characterized in that, The left end plate or the right end plate is provided with a drainage pipe.

8. The fuel cell stack module as described in claim 1, characterized in that, Both the air inlet pipe and the air outlet pipe are equipped with throttle valves.

9. The fuel cell stack module as described in claim 1, characterized in that, The upper cover plate is equipped with a hydrogen concentration sensor.

10. The fuel cell stack module according to any one of claims 1 to 9, characterized in that, The hydrogen circulation pipe assembly is disposed between the first distribution pipe assembly and the second distribution pipe assembly.

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