A fuel cell stack packaging structure and fuel cell system

Abstract

This invention relates to a fuel cell stack packaging structure and a fuel cell system. The fuel cell stack packaging structure includes: a shell forming a packaging space to encapsulate the fuel cell stack, including a front side plate and a rear side plate respectively disposed at opposite ends of the fuel cell stack; a hydrogen-air-liquid pipeline structure, including a first hydrogen-air-liquid inlet port and a first hydrogen-air-liquid outlet port, the first hydrogen-air-liquid inlet port communicating with the fuel cell stack's hydrogen-air-liquid inlet pipeline, and the first hydrogen-air-liquid outlet port communicating with the fuel cell stack's hydrogen-air-liquid outlet pipeline; and an electrical installation structure, including: a low-voltage power supply port, a power output port, a communication port, and a CVM wiring harness port. The hydrogen-air-liquid pipeline structure is located on one of the two side plates, the front and rear side plates, and the electrical installation structure is located on the other side plate, so that the gas pipeline and electrical wiring are located on opposite sides of the fuel cell stack, achieving gas-electric separation and avoiding safety hazards caused by pipeline leakage. The entire shell is used to encapsulate the fuel cell stack, providing good sealing performance.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and more specifically, to a fuel cell stack packaging structure and a fuel cell system. Background Technology

[0002] Fuel cell stacks are typically composed of multiple individual cells (cell packs) combined, stacked, and packaged together. Because the packaging of the stack couples factors such as load transfer, mass transport, energy exchange, multiphase flow, and electrochemical reactions, the membrane electrode assembly and seals deform during the packaging process, making it difficult to predict and evaluate the performance of the stack after packaging.

[0003] Existing packaging methods have the following drawbacks: low packaging process efficiency, poor packaging accuracy, and high fuel cell stack packaging cost. In particular, when using manual operation, the packaging progress is slow, the manual operation error rate is high, and it is impossible to assemble a high-reliability fuel cell stack in a high-efficiency and low-cost manner.

[0004] For example, the stack packaging is separate from the assembly of the fuel cell stack itself. The fuel cell stack is assembled first, and then the stack packaging is assembled. Furthermore, the stack packaging involves numerous components, complex processes, a chaotic gas-electric installation structure layout, and poor integration, posing serious safety hazards for subsequent use. Additionally, the packaging structure has poor sealing performance, the stack is not securely fixed, and the requirements for assembly and subsequent maintenance are high, resulting in higher production and maintenance costs. Summary of the Invention

[0005] The purpose of this invention is to overcome the technical problems of unreasonable packaging structure layout and poor integration of existing series fuel cell stacks, which cause safety hazards in the fuel cell stack, and thus provide a fuel cell stack packaging structure and fuel cell stack system.

[0006] To address the above problems, the first objective of this invention is to provide a fuel cell stack packaging structure, the packaging structure comprising:

[0007] A housing that forms an encapsulation space to encapsulate the fuel cell stack, comprising a front side plate and a rear side plate disposed at opposite ends of the fuel cell stack;

[0008] A hydrogen-air-liquid piping structure includes a first hydrogen-air-liquid inlet and a first hydrogen-air-liquid outlet, wherein the first hydrogen-air-liquid inlet is connected to the hydrogen-air-liquid medium discharge channel of the fuel cell stack, and the first hydrogen-air-liquid outlet is connected to the hydrogen-air-liquid medium discharge channel of the fuel cell stack; and...

[0009] An electrical installation structure includes: a low-voltage power supply interface for supplying power to the fuel cell stack; a power output interface for outputting the voltage generated by the fuel cell stack to a load; a communication interface for establishing a communication connection with the fuel cell stack; and a CVM harness interface for connecting to a CVM voltage detection device.

[0010] The hydrogen-air-liquid pipeline structure is located on one of the two side plates, the front side plate and the rear side plate, and the electrical installation structure is located on the other side plate, the front side plate and the rear side plate.

[0011] Optionally, the first hydrogen-air-liquid inlet includes a first pipeline interface plate and a hydrogen-air-liquid medium inlet pipe; the hydrogen-air-liquid medium inlet pipe is installed on the first pipeline interface plate and passes through its side plate to communicate with the hydrogen-air-liquid medium discharge channel; the first hydrogen-air-liquid outlet includes a second pipeline interface plate and a hydrogen-air-liquid medium outlet pipe, the hydrogen-air-liquid medium outlet pipe is installed on the second pipeline interface plate and passes through its side plate to communicate with the hydrogen-air-liquid medium discharge channel.

[0012] Optionally, it also includes a sealing strip; the housing also includes a base and a cover plate; the front side plate and the rear side plate are respectively disposed at opposite ends of the base; the cover plate covers the base, the front side plate and the rear side plate, the front side plate, the rear side plate and the base are respectively connected to the cover plate by screws to form the encapsulation space, and the sealing strip is provided at the connection to seal the encapsulation space to form a closed space.

[0013] Optionally, it also includes an air purging and displacement pipeline, which includes a first displacement gas inlet connector and a first displacement gas outlet connector respectively connected to the encapsulation space. The first displacement gas inlet connector is located on one of the two side plates of the front side plate and the rear side plate, and the first displacement gas outlet connector is located on the other side plate of the two side plates of the front side plate and the rear side plate.

[0014] Optionally, the CVM voltage detection device includes a detection module corresponding to each individual battery cell and elastic pins inserted into the detection module. Each elastic pin is electrically connected to the corresponding individual battery cell to detect the voltage of the individual battery cell.

[0015] Optionally, the enclosure also includes a PTC heater and multiple sensors, which are used to detect the temperature, humidity, and hydrogen concentration of the enclosure.

[0016] Optionally, it also includes a battery stack fixing rod built into the packaging space, which is mounted at both ends of the battery stack to constrain the battery stack within the packaging space.

[0017] Optionally, the fuel cell stack fixing rod is connected to the cover plate by screws, and the sealing strip is provided at the connection point.

[0018] Optionally, the sealing strip is integrally molded.

[0019] Optionally, the sealing strip is wrapped around the outside of the screw.

[0020] Optionally, the base and the fuel cell stack are provided with a concave-convex fitting structure, and the two ends of the fuel cell stack fixing rod are connected to the base and cooperate with the concave-convex fitting structure to restrict the fuel cell stack.

[0021] Optionally, the fuel cell stack includes a first fuel cell stack structure, a second fuel cell stack structure, and an insulating centrally located gas box connected between the first fuel cell stack structure and the second fuel cell stack structure. The insulating centrally located gas box has a hydrogen-air-liquid medium inlet channel and a hydrogen-air-liquid medium outlet channel on both sides.

[0022] Optionally, the first hydrogen-air liquid inlet port is connected to the hydrogen-air liquid medium discharge channel via a hydrogen-air liquid inlet pipeline; the first hydrogen-air liquid outlet port is connected to the hydrogen-air liquid medium discharge channel via a hydrogen-air liquid outlet pipeline.

[0023] Optionally, the hydrogen-air-liquid medium discharge channel includes a hydrogen inlet channel, an air inlet channel, and a water inlet channel that are independently arranged; the hydrogen-air-liquid medium inlet pipe includes a hydrogen inlet pipe, an air inlet pipe, and a water inlet pipe that are arranged in a mutually arranged manner, and the hydrogen inlet pipe, the air inlet pipe, and the water inlet pipe are respectively connected to the hydrogen inlet channel, the air inlet channel, and the water inlet channel in a one-to-one correspondence.

[0024] Optionally, the medium discharge channel includes a hydrogen discharge channel, an air discharge channel, and a water discharge channel that are independently arranged; the medium discharge pipe includes a hydrogen outlet pipe, an air outlet pipe, and a water outlet pipe that are independently arranged, and the hydrogen outlet pipe, the air outlet pipe, and the water outlet pipe are respectively connected to the hydrogen discharge channel, the air discharge channel, and the water discharge channel in a one-to-one correspondence.

[0025] A second objective of the present invention is to provide a fuel cell system comprising the stack encapsulation structure described in any one of the above claims, wherein the stack is encapsulated within the encapsulation space.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. By designing a fuel cell stack encapsulation structure, the encapsulation structure includes a shell, a hydrogen-air-liquid pipeline structure, and an electrical installation structure. The shell includes a front side plate and a rear side plate that are positioned opposite each other and located at the front and rear sides of the fuel cell stack, respectively serving as carriers for the hydrogen-air-liquid pipeline structure and the electrical installation structure. One side is used for connecting the hydrogen-air-liquid pipeline structure, and the other side is mainly used for installing the electrical structure. The gas-electric separation layout is more reasonable and avoids safety hazards caused by pipeline leakage. The entire shell is used to encapsulate the fuel cell stack, and the sealing performance is good.

[0028] 2. The hydrogen-air-liquid pipeline structure includes a first hydrogen-air-liquid inlet and a first hydrogen-air-liquid outlet, both located on the same side plate and connected to the hydrogen-air-liquid medium inlet and outlet channels of the fuel cell, respectively, resulting in a simple and compact gas path layout. The electrical installation structure includes a low-voltage power supply interface, a power output interface, a communication interface, and a CVM wiring harness interface. The low-voltage power supply interface supplies power to the fuel cell stack, the power output interface outputs the voltage generated by the fuel cell stack to the load, and the communication interface establishes a communication connection with the fuel cell stack. The CVM voltage detection device is connected to one side of the stack fixing rod along the stacking direction of the fuel cell stack and is electrically connected to the CVM wiring harness interface. All electrical installation structures are located on the other side plate of the fuel cell stack, resulting in a reasonable electrical layout and convenient installation and operation.

[0029] 3. This application achieves electrical separation of the fuel cell and monitors internal humidity, temperature, and hydrogen concentration through purging and heating, thereby ensuring the safety of fuel cell operation.

[0030] 4. This application exhibits superior sealing performance. The sealing strip not only seals the connection points between the cover plate and the base and the fuel cell stack fixing rod, but also seals any leakage points caused by the connecting parts. Furthermore, the sealing strip is integrally molded, eliminating any leakage points in this application.

[0031] 5. This application achieves fixed installation of the fuel cell stack through the interlocking of the concave-convex fitting structure and the mutual cooperation of the stack fixing rod, realizing the horizontal and vertical limiting and fixing of the stack. The assembly is reliable and not prone to shaking, ensuring the normal operation of the stack. Furthermore, it changes the existing technology's method of fixing the stack at both ends, eliminating assembly difficulties caused by accumulated dimensional errors from stacking different stacks, thus ensuring installation efficiency. Further, the stack fixing rod, because it surrounds the outer periphery of the stack, forms internal support, effectively protecting the stack and improving the fuel cell's pressure and impact resistance. The concave-convex fitting structure makes manual assembly of the fuel cell easy and simple, improving the stack installation efficiency. Moreover, the first guide part and the first limiting part together form a horizontal constraint on the stack, providing coarse and fine positioning during the stack assembly process, further improving assembly efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of one direction of the stack packaging structure in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of another direction of the stack packaging structure in an embodiment of the present invention;

[0034] Figure 3This is a schematic diagram of the internal structure of the fuel cell stack packaging structure in one direction according to an embodiment of the present invention;

[0035] Figure 4 This is an exploded structural diagram of the front side plate in the fuel cell stack packaging structure in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of another direction of the internal structure of the fuel cell stack packaging structure in an embodiment of the present invention;

[0037] Figure 6 This is an exploded structural diagram of the rear side plate in the fuel cell stack packaging structure in an embodiment of the present invention;

[0038] Figure 7 This is an exploded view of the fuel cell stack packaging structure in an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the structure of the insulated gas box in an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the base structure in an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Shell;

[0043] 11-Front side panel; 12-Rear side panel; 13-Base; 131-Guide groove; 132-Blind groove; 14-Cover plate;

[0044] 2- Hydrogen-air-liquid piping structure;

[0045] 21-First hydrogen-air liquid inlet;

[0046] 211-First pipeline interface plate; 212-Hydrogen-air-liquid medium inlet pipe; 2121-Hydrogen inlet pipe; 2122-Air inlet pipe; 2123-Water inlet pipe;

[0047] 22-First hydrogen-air liquid discharge port;

[0048] 221-Second pipeline interface plate; 222-Hydrogen-air-liquid medium discharge pipe; 2221-Hydrogen outlet pipe; 2222-Air outlet pipe; 2223-Water outlet pipe;

[0049] 23-Hydrogen-air liquid inlet pipeline; 24-Hydrogen-air liquid outlet pipeline; 25-O-ring seal;

[0050] 3-Electrical installation structure;

[0051] 31-Low-voltage power supply interface; 32-Power output interface; 33-Communication interface; 34-CVM harness interface;

[0052] 4-CVM voltage detection device;

[0053] 41-Detection module; 42-Elastic pin; 43-Wire harness fixing bracket.

[0054] 5-Fuel stack fixing rod; 51-Positioning protrusion;

[0055] 6-Air purging and replacement piping;

[0056] 61-First displacement gas inlet connector; 62-First air purging channel; 63-First displacement gas outlet connector;

[0057] 7 - PTC heater; 8 - Sensor;

[0058] 9-Fuel stack;

[0059] 91-First fuel cell stack structure; 92-Second fuel cell stack structure; 93-Insulated gas box with central insulation;

[0060] 931-Hydrogen-air-liquid medium discharge channel; 9311-Hydrogen gas inlet channel; 9312-Air inlet channel; 9313-Water inlet channel;

[0061] 932-Hydrogen-air-liquid medium discharge channel; 9321-Hydrogen discharge channel; 9322-Air discharge channel; 9323-Water discharge channel;

[0062] 10-Sealing strip. Detailed Implementation

[0063] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] In the description of this invention, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; they can also refer to the internal connection of two components; they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In fuel cells, hydrogen, air, and liquid are three independently transported media, as is known to those skilled in the art.

[0066] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0067] like Figure 1-9 As shown, an embodiment of the present invention provides a fuel cell stack packaging structure, the packaging structure including a housing 1, a hydrogen-air-liquid pipeline structure 2, and an electrical mounting structure 3, wherein:

[0068] The housing 1 forms an encapsulation space to encapsulate the fuel cell stack 9. The housing 1 includes a front side plate 11 and a rear side plate 12 respectively disposed at opposite ends of the fuel cell stack 9.

[0069] The hydrogen-air-liquid pipeline structure 2 includes a first hydrogen-air-liquid inlet 21 and a first hydrogen-air-liquid outlet 22. The first hydrogen-air-liquid inlet 21 is connected to the hydrogen-air-liquid medium discharge channel 931 of the fuel cell stack 9, and the first hydrogen-air-liquid outlet 22 is connected to the hydrogen-air-liquid medium discharge channel 932 of the fuel cell stack 9.

[0070] Electrical installation structure 3 includes a low-voltage power supply interface 31, a power output interface 32, a communication interface 33, and a CVM wiring harness interface 34, wherein:

[0071] The low-voltage power supply interface 31 is used to supply power to the fuel cell stack 9; the power output interface 32 is used to output the voltage generated by the fuel cell stack 9 to the load; the communication interface 33 is used to establish a communication connection with the fuel cell stack 9; the CVM harness interface 34 is used to connect to the CVM voltage detection device 4, which is mounted on the harness fixing bracket 43. One end of the harness fixing bracket 43 is connected to the end plate of the fuel cell stack 9, and the other end is connected to the insulating gas-insulated box 93.

[0072] The hydrogen-air-liquid pipeline structure 2 is located on one of the two side plates, the front side plate 11 and the rear side plate 12, and the electrical installation structure 3 is located on the other side plate, the front side plate 11 and the rear side plate 12.

[0073] In practical applications, the first hydrogen-air liquid inlet 21 is directly connected to the hydrogen-air liquid medium discharge channel 931 of the fuel cell stack (9), or the two are indirectly connected through the hydrogen-air liquid inlet pipe 23. Similarly, the first hydrogen-air liquid outlet 22 is directly connected to the hydrogen-air liquid medium discharge channel 932 of the fuel cell stack 9, or the two are indirectly connected through the hydrogen-air liquid discharge pipe 24. The front and rear side plates can be arranged in a direction along the stacking direction of the fuel cell stack 9 or perpendicular to the stacking direction of the fuel cell stack 9, depending on the specific requirements.

[0074] Please see Figure 1 , 7 As shown, in this specific embodiment, the housing 1 includes a front side plate 11 and a rear side plate 12 that are arranged opposite each other and located on the front and rear sides of the fuel cell stack 9, respectively. The housing 1 is used to encapsulate the fuel cell stack 9.

[0075] The hydrogen-air-liquid pipeline structure 2 includes a first hydrogen-air-liquid inlet port 21 and a first hydrogen-air-liquid outlet port 22 installed on the front side plate 11. The first hydrogen-air-liquid inlet port 21 and the first hydrogen-air-liquid outlet port 22 are respectively connected to the hydrogen-air-liquid inlet pipeline 23 and the hydrogen-air-liquid outlet pipeline 24 of the fuel cell stack 9 to form the medium pipeline of the fuel cell stack 9.

[0076] Correspondingly, the electrical installation structure 3 is equipped with a low-voltage power supply interface 31, an energy output interface 32, a communication interface 33, and a CVM wiring harness interface 34 on the rear panel 12. The low-voltage power supply interface 31 is used to supply power to the fuel cell stack, the energy output interface 32 is used to output the voltage generated by the fuel cell stack to the load, and the communication interface 33 is used to establish a communication connection with the fuel cell stack to form an electrical circuit.

[0077] Therefore, the hydrogen-air-liquid pipeline structure 2 and the electrical installation structure 3 are located on the front side plate 11 and the rear side plate 12 of the fuel cell stack 9, respectively, so that the hydrogen-air-liquid pipeline and the electrical circuit are located on both sides of the fuel cell stack 9, thereby achieving gas-electric separation.

[0078] The CVM voltage detection device 4 is connected to one side of the fuel cell stack fixing rod 5 along the stacking direction of the fuel cell stack 9, and the CVM voltage detection device 4 is electrically connected to the CVM harness interface 34.

[0079] As a preferred embodiment of the present invention, the first hydrogen-air-liquid inlet interface 21 includes a first pipeline interface plate 211 and a hydrogen-air-liquid medium inlet pipe 212. The hydrogen-air-liquid medium inlet pipe 212 is installed on the first pipeline interface plate 211 and passes through its side plate to communicate with the hydrogen-air-liquid inlet pipe 23.

[0080] The first hydrogen-air-liquid discharge port 22 includes a second pipeline interface plate 221 and a hydrogen-air-liquid medium discharge pipe 222. The hydrogen-air-liquid medium discharge pipe 222 is installed on the second pipeline interface plate 221 and passes through its side plate to communicate with the hydrogen-air-liquid discharge pipe 24.

[0081] Please see Figure 1 As shown, in a specific embodiment of the present invention, the first hydrogen-air liquid inlet interface 21 includes a first pipeline interface plate 211 connected to the front side plate 11 and a hydrogen-air liquid medium inlet pipe 212 passing through the first pipeline interface plate 211. The hydrogen-air liquid medium inlet pipe 212 is sealed to the first pipeline interface plate 211 by an O-ring 25. The first hydrogen-air liquid outlet interface 22 includes a second pipeline interface plate 221 connected to the front side plate 11 and a hydrogen-air liquid medium outlet pipe 222 passing through the second pipeline interface plate 221.

[0082] Thus, the external hydrogen-air liquid medium enters the hydrogen-air liquid inlet pipe 23 of the fuel cell stack 9 through the hydrogen-air liquid medium inlet pipe 212, and is diverted to the single cell fuel cell stack through the pipe of the insulated central gas box 93 to react. After the reaction is completed, it is discharged outward through the medium discharge pipe 222 through the hydrogen-air liquid discharge pipe 24 through the pipe on the other side of the insulated central gas box 93.

[0083] In a preferred embodiment of the present invention, the fuel cell stack packaging structure further includes a sealing strip 10, and the housing 1 further includes a base 13 and a cover plate 14. The front side plate 11 and the rear side plate 12 are respectively disposed at opposite ends of the base 13. The cover plate 14 covers the base 13, the front side plate 11 and the rear side plate 12. The front side plate 11, the rear side plate 12 and the base 13 are respectively connected to the cover plate 14 by screws to form the packaging space, and a sealing strip 10 is provided at the connection to seal the packaging space to form a closed space.

[0084] Please see Figure 7 As shown, in a specific embodiment of the present invention, the housing 1 further includes a base 13 connected to the bottom between the front side plate 11 and the rear side plate 12 and a cover plate 14 adapted to cover the base 13. The front side plate 11, the rear side plate 12, the base 13 and the cover plate 14 are connected by screws to form a space for accommodating the fuel cell stack 9, and the connection is sealed by a sealing strip 10 to form a closed space.

[0085] As a preferred embodiment of the present invention, the fuel cell stack packaging structure further includes an air purging and displacement pipeline 6. The air purging and displacement pipeline 6 includes a first displacement gas inlet connector 61 and a first displacement gas outlet connector 63 that are respectively connected to the packaging space. The first displacement gas inlet connector 61 is located on one of the two side plates, the front side plate 11 and the rear side plate 12, and the first displacement gas outlet connector 63 is located on the other side plate, the front side plate 11 and the rear side plate 12.

[0086] Please see Figure 1 , 2As shown in Figures 3, 5, and 7, in a specific embodiment of the present invention, the air purging and displacement pipeline 6 includes a first displacement gas inlet connector 61 located on the same side as the hydrogen-air-liquid pipeline structure 2, a first air purging channel 62 opened on the upper surface of the base 13, and a first displacement gas outlet connector 63 located on the same side as the electrical installation structure 3. The first displacement gas inlet connector 61 is located on the lower side of the front side plate 11.

[0087] Correspondingly, the first displacement gas outlet connector 63 is located on the upper side of the rear side plate 12, and the first air purging channel 62 extends horizontally from one end of the base 13 along its length to the end plate passing through the fuel cell stack to form an air circulation channel. Air is introduced from the air compressor to the first displacement gas inlet connector 61, displaces the air in the encapsulation space through the first air purging channel 62, and is discharged to the first displacement gas outlet connector 63.

[0088] Specifically, please refer to Figure 7 As shown, in another embodiment of the present invention, the CVM voltage detection device 4 includes a detection module 41 corresponding to each individual cell and an elastic pin 42 inserted on the detection module 41. Each elastic pin 42 is electrically connected to the corresponding individual cell to detect the voltage of the individual cell.

[0089] Specifically, please refer to Figure 7 As shown, in another embodiment of the present invention, a PTC heater 7 and a plurality of sensors 8 are also included on the base 13. The plurality of sensors 8 are used to detect the ambient temperature, humidity, and hydrogen concentration within the encapsulation space.

[0090] When the humidity sensor detects that the humidity in the encapsulation space exceeds the set value, the PTC heater 8 is activated to heat the internal air for dehumidification. When the temperature sensor detects that the temperature in the encapsulation space is lower than the set value, or when a cold start control strategy needs to be implemented, the PTC heater 7 is activated to heat the encapsulation space to drive the two-stage fuel cell stack to heat up. When the hydrogen sensor detects that the hydrogen concentration in the encapsulation space exceeds the set value or reaches the preset purging time, the encapsulation space can be purged through the first replacement gas inlet connector 61, the first air purging channel 62, and the first replacement gas outlet connector 63 to ensure its safe and reliable operation.

[0091] Specifically, please refer to Figure 7 As shown, in an embodiment of the present invention, the fuel cell stack packaging structure further includes a fuel cell stack fixing rod 5 built into the packaging space. The fuel cell stack fixing rod 5 is mounted at both ends of the fuel cell stack 9 to constrain the fuel cell stack 9 within the packaging space.

[0092] The fuel cell stack fixing rod 5 is connected to the cover plate 14 by screws, and a sealing strip 10 is provided at the connection.

[0093] Please see Figure 7 As shown, in a preferred embodiment of the present invention, the sealing strip 10 is integrally formed. Specifically, the sealing strip 10 between the cover plate 14 and the front side plate 11, the rear side plate 12, the base 13 and the fuel cell stack fixing rod 5 is a single, integrally formed piece.

[0094] Please see Figure 7 As shown, in another preferred embodiment of the present invention, the sealing strip 10 is wrapped around the outside of the screw. Specifically, the cover plate 14 is connected to the front side plate 11, the rear side plate 12, the base 13, and the fuel cell mounting rod 5 by screws. The sealing strip 10 is a hollow sealing strip, and the screw is located exactly in the hollow position, so that the sealing strip 10 is wrapped around the outer periphery of the screw, thereby achieving no leakage points at the screw connection of the present application and improving the sealing and dustproof effect of the present application.

[0095] In an embodiment of the present invention, a concave-convex fitting structure is provided between the base 13 and the fuel cell stack 9, and the two ends of the fuel cell stack fixing rod 5 are connected to the base 13 and cooperate with the concave-convex fitting structure to restrict the fuel cell stack 9.

[0096] Specifically, in the embodiments of the present invention, the fuel cell stack fixing rod 5 is connected to the upper and lower surfaces of the fuel cell stack 9 along the stacking direction, and a positioning protrusion 51 is provided on the side surface of the fuel cell stack fixing rod 5 away from the fuel cell stack 9. A guide groove 131 and a blind groove 132 are provided on the base 13 corresponding to the position of the positioning protrusion 51 on the fuel cell stack fixing rod 5. When the positioning protrusion 51 falls into the blind groove 132 in the guide groove 131, the positioning protrusion 51 corresponding to the position of the insulating central gas box 93 is engaged in the corresponding blind groove 132 on the base 13 as a fine positioning reference, and other positioning protrusions 51 are adjusted and fall into the corresponding blind groove 132.

[0097] Specifically, please refer to Figure 7 As shown, in an embodiment of the present invention, the fuel cell stack 9 includes a first fuel cell stack structure 91 and a second fuel cell stack structure 92 arranged opposite each other, and an insulating central gas box 93 connected between the first fuel cell stack structure 91 and the second fuel cell stack structure 92. The insulating central gas box 93 has a hydrogen-air-liquid medium inlet channel 931 and a hydrogen-air-liquid medium outlet channel 932 on both sides.

[0098] The first hydrogen-air liquid inlet port 21 and the first hydrogen-air liquid outlet port 22 are respectively connected to the hydrogen-air liquid medium inlet channel 931 and the hydrogen-air liquid medium outlet channel 932 through the fuel cell stack pipeline.

[0099] Specifically, please refer to Figure 8 As shown, in an embodiment of the present invention, the hydrogen-air-liquid medium discharge channel 931 includes a hydrogen inlet channel 9311, an air inlet channel 9312, and a water inlet channel 9313, which are independently arranged.

[0100] The hydrogen-air-liquid medium inlet pipe 212 includes a hydrogen inlet pipe 2121, an air inlet pipe 2122, and a water inlet pipe 2123, which are independently arranged. The hydrogen inlet pipe 2121, the air inlet pipe 2122, and the water inlet pipe 2123 are respectively connected to the hydrogen inlet channel 9311, the air inlet channel 9312, and the water inlet channel 9313.

[0101] Specifically, please refer to Figure 8 As shown, in an embodiment of the present invention, the hydrogen-air-liquid medium discharge channel 932 includes a hydrogen discharge channel 9321, an air discharge channel 9322, and a water discharge channel 9323, which are independently arranged.

[0102] The hydrogen-air-liquid medium discharge pipe 222 includes a hydrogen outlet pipe 2221, an air outlet pipe 2222, and a water outlet pipe 2223, which are independently configured. The hydrogen outlet pipe 2221, the air outlet pipe 2222, and the water outlet pipe 2223 are respectively connected to the hydrogen discharge channel 9321, the air discharge channel 9322, and the water discharge channel 9323.

[0103] Specifically, both the first and second fuel cell stack structures are composed of multiple stacked single-cell fuel cell stacks, and the number of single-cell fuel cell stacks in the first and second fuel cell stack structures may be the same or different. Both the first and second fuel cell stack structures are provided with a hydrogen-air-liquid distribution channel inlet and a hydrogen-air-liquid distribution channel outlet. The hydrogen-air-liquid distribution channel inlet includes independent hydrogen distribution channel inlets, air distribution channel inlets, and water distribution channel inlets, and the hydrogen-air-liquid distribution channel outlet includes independent hydrogen distribution channel outlets, air distribution channel outlets, and water distribution channel outlets. The hydrogen-air-liquid inlet pipeline 23 includes independently configured hydrogen inlet pipelines, air inlet pipelines, and water inlet pipelines, and the hydrogen-air-liquid outlet pipeline 24 includes hydrogen outlet pipelines, air outlet pipelines, and water outlet pipelines. Hydrogen flows sequentially through hydrogen inlet pipe 2121, hydrogen inlet pipe, and hydrogen inlet channel 9311 to the inlet of hydrogen distribution channel, then flows to the bipolar plate to participate in the reaction. Unreacted hydrogen flows from the bipolar plate to the outlet of hydrogen distribution channel, and finally flows sequentially through hydrogen outlet channel 9321, hydrogen outlet pipe, and hydrogen outlet pipe 2221 to exit. Air flows sequentially through air inlet pipe 2122, air inlet pipe, and air inlet channel 9312 to the inlet of air distribution channel, then flows to the bipolar plate to participate in the reaction. Unreacted hydrogen flows from the bipolar plate to the outlet of hydrogen distribution channel, and finally flows to the outlet of hydrogen distribution channel 9321. The air and some of the water produced by the reaction will flow from the bipolar plate to the air distribution channel outlet, and finally flow through the air exhaust channel 9322, the air exhaust pipe, and the air outlet pipe 2222 in sequence before flowing out. The cooling water will flow through the water inlet pipe 2123, the water inlet pipe, and the water inlet channel 9313 in sequence to the water distribution channel inlet, and then flow to the bipolar plate for heat exchange. The cooled water after heat exchange will flow from the bipolar plate to the water distribution channel outlet, and finally flow through the water exhaust channel 9323, the water exhaust pipe, and the water outlet pipe 2223 in sequence before flowing out.

[0104] It is worth noting that the fuel cell stack 9 applicable to this invention can be the fuel cell stack structure described in the above embodiments, or it can be a fuel cell stack of other structural types.

[0105] Another embodiment of the present invention provides a fuel cell system, the fuel cell system including the stack packaging structure as described above, wherein the stack 9 is packaged within the packaging space.

[0106] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this invention.

Claims

1. A stack packaging structure, characterized by, The application relates to a hydrogen-air liquid pipeline structure (2) comprising a first hydrogen-air liquid inlet interface (21) and a first hydrogen-air liquid outlet interface (22), wherein the first hydrogen-air liquid inlet interface (21) is communicated with a hydrogen-air liquid medium discharge channel (931) of the stack (9), and the first hydrogen-air liquid outlet interface (22) is communicated with a hydrogen-air liquid medium discharge channel (932) of the stack (9). The application further relates to an electrical installation structure (3) comprising a low-voltage power supply interface (31) for supplying power to the stack (9), an electrical energy output interface (32) for outputting the voltage generated by the stack (9) to a load, a communication interface (33) for establishing a communication connection with the stack (9), and a CVM wire harness interface (34) for connecting with a CVM voltage detection device (4). The CVM voltage detection device (4) comprises a detection module (41) corresponding to each single cell and an elastic needle (42) inserted on the detection module (41), each elastic needle (42) is electrically connected with the corresponding single cell for detecting the voltage of the single cell. The first hydrogen-air liquid inlet interface (21) comprises a first pipeline interface plate (211) and a hydrogen-air liquid medium inlet pipe (212), the hydrogen-air liquid medium inlet pipe (212) is installed on the first pipeline interface plate (211) and penetrates through the side plate to be communicated with the hydrogen-air liquid medium discharge channel (931). The first hydrogen-air liquid outlet interface (22) comprises a second pipeline interface plate (221) and a hydrogen-air liquid medium discharge pipe (222), the hydrogen-air liquid medium discharge pipe (222) is installed on the second pipeline interface plate (221) and penetrates through the side plate to be communicated with the hydrogen-air liquid medium discharge channel (932). ​ ​ ​ ​ 2. The stack packaging structure according to claim 1, wherein ​ ​ 3. The stack package structure of claim 1, wherein: Further comprising a sealing strip (10); the shell (1) further comprises a base (13) and a cover plate (14); the front side plate (11) and the rear side plate (12) are respectively arranged at opposite ends of the base (13); the cover plate (14) is arranged above the base (13), the front side plate (11) and the rear side plate (12), and the front side plate (11), the rear side plate (12) and the base (13) are respectively connected with the cover plate (14) by screws to form the packaging space, and the sealing strip (10) is arranged at the connecting position to seal the packaging space to form a closed space.

4. The stack packaging structure according to claim 3, wherein: Further comprising an electric pile fixing rod (5) arranged in the packaging space, which is arranged at both ends of the electric pile (9) to constrain the electric pile (9) in the packaging space.

5. The stack package structure of claim 4, wherein: The electric pile fixing rod (5) is connected with the cover plate (14) by screws, and the sealing strip (10) is arranged at the connecting position; and / or, The sealing strip (10) is integrally formed; and / or, The sealing strip (10) is arranged outside the screw; and / or, The base (13) and the electric pile (9) are provided with a concave-convex matching structure, and the two ends of the electric pile fixing rod (5) are connected with the base (13) and matched with the concave-convex matching structure to limit the electric pile (9). The electric pile (9) comprises a first electric pile structure (91), a second electric pile structure (92) and an insulating middle air tank (93) connected between the first electric pile structure (91) and the second electric pile structure (92), and the two sides of the insulating middle air tank (93) are respectively provided with the hydrogen-air liquid medium inlet channel (931) and the hydrogen-air liquid medium outlet channel (932); and / or, 6. The stack packaging structure according to any one of claims 1 to 3 or 5, wherein: The first hydrogen-air liquid inlet interface (21) is communicated with the hydrogen-air liquid medium inlet channel (931) through a hydrogen-air liquid inlet pipeline (23), and the first hydrogen-air liquid outlet interface (22) is communicated with the hydrogen-air liquid medium outlet channel (932) through a hydrogen-air liquid outlet pipeline (24). The hydrogen-air liquid medium inlet channel (931) comprises a hydrogen inlet channel (9311), an air inlet channel (9312) and a water inlet channel (9313) arranged independently; 7. The stack package structure of claim 6, wherein: The hydrogen-air liquid medium inlet pipe (212) comprises a hydrogen inlet pipe (2121), an air inlet pipe (2122) and a water inlet pipe (2123) arranged independently, and the hydrogen inlet pipe (2121), the air inlet pipe (2122) and the water inlet pipe (2123) are respectively connected with the hydrogen inlet channel (9311), the air inlet channel (9312) and the water inlet channel (9313) one by one. The hydrogen-air liquid medium outlet channel (932) comprises a hydrogen outlet channel (9321), an air outlet channel (9322) and a water outlet channel (9323) arranged independently; 8. The stack packaging structure according to claim 7, wherein: ​ The hydrogen-air-water liquid medium discharge pipe (222) comprises a hydrogen discharge pipe (2221), an air discharge pipe (2222) and a water discharge pipe (2223) arranged relatively independently, and the hydrogen discharge pipe (2221), the air discharge pipe (2222) and the water discharge pipe (2223) are respectively connected with the hydrogen discharge channel (9321), the air discharge channel (9322) and the water discharge channel (9323) one by one.

9. A fuel cell system characterized by comprising: The fuel cell system comprises the stack packaging structure according to any one of claims 1 to 8, and the stack (9) is packaged in the packaging space.

Images