Fuel cell internal temperature three-dimensional distribution detection device and fuel cell

Abstract

The application relates to the technical field of fuel cell thermal management, and discloses a fuel cell internal temperature three-dimensional distribution detection device and a fuel cell. The detection device comprises a temperature partition collection plate arranged on a fuel cell polar plate. The temperature partition collection plate is provided with a plurality of temperature collection modules arranged along the length direction of the polar plate flow channel. Each module contains three temperature sensors which respectively correspond to collecting the temperatures of the outer side of the polar plate, the bottom of the flow channel and the bottom of the flow channel ridge. An installation detection hole is arranged at the corresponding position of the polar plate. The sensor detection end is arranged in the hole and the gap is filled with heat-conducting glue. The application can synchronously obtain the temperature distribution of three key planes perpendicular to the membrane electrode direction with the same spatial resolution, accurately quantize the temperature gradient and completely present the three-dimensional temperature field in the battery. The application can provide key data for the correlation analysis of the core reaction zone heat distribution and the stack performance, help optimize the thermal management strategy and improve the stack operation stability and service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to fuel cell thermal management, and more particularly to a fuel cell internal temperature three-dimensional distribution detection device and a fuel cell. BACKGROUND

[0002] Under the background of energy transformation today, proton exchange membrane fuel cell (PEMFC) as a kind of efficient and clean energy conversion device has been widely concerned. PEMFC is the fifth generation of fuel cells developed after alkaline fuel cell, phosphoric acid fuel cell, molten carbonate fuel cell and solid oxide fuel cell. Compared with the previous fuel cells, proton exchange membrane fuel cell has the advantages of low temperature and fast start, high energy density, etc. At present, proton exchange membrane fuel cell has been successfully applied to the fields of automobile, portable power supply, fixed charging station, etc., and has realized mass production and reached a certain degree of commercial application.

[0003] The service life of fuel cell is one of the key factors to determine whether it can be commercialized on a large scale. Because the electrodes and membranes of fuel cell will degrade over time, the service life of hydrogen fuel cell is relatively short. The internal temperature of fuel cell stack has a crucial influence on the performance and service life of fuel cell. The optimal working temperature range of PEMFC is small, usually around 60-80℃, and its operating efficiency is relatively good in this temperature range. When the temperature is too low, the electrochemical reaction rate slows down and the output power of the battery decreases; when the temperature is too high, it will accelerate the aging of the electrode and membrane material, leading to the deterioration of the battery performance, and even may cause damage to the membrane, resulting in damage to the battery components and shortening the service life of the battery. Moreover, local overheating and uneven temperature distribution will also have a negative impact on the performance of the stack. The electrodes and membrane materials in the local overheating area will bear greater thermal stress, accelerating their degradation process, while uneven temperature distribution will lead to inconsistent performance of each single cell, thereby affecting the output stability and reliability of the entire stack. Therefore, it is of great significance to accurately monitor and effectively control the internal temperature of the stack.

[0004] Currently, there are various methods for partitioned detection of fuel cell internal temperature. Common methods include thermometer measurement, which measures the temperature of the temperature control zone through direct contact, but this method can only obtain single-point temperature information and cannot achieve comprehensive monitoring of the entire area. In practical applications, due to the complex internal structure of fuel cells, installing multiple thermometers can face space limitations and other issues. Thermocouple measurement uses thermocouple sensors to measure temperature, which is based on the thermoelectric effect of two different metals to convert temperature signals into electrical signals for measurement. Thermocouples have the advantages of fast response speed and high precision, but also have the limitation of only measuring discrete point temperatures, making it difficult to accurately assess temperature distribution over a large area. Thermal imager detection is a non-contact temperature measurement method that uses infrared radiation emitted by objects to generate thermal images, thereby visually displaying temperature distribution. Thermal imagers can achieve large-area temperature monitoring and quickly obtain temperature field information, but the equipment cost is high and has certain requirements for environmental conditions, such as high temperature, high humidity, or obstructions, which can affect measurement accuracy.

[0005] In recent years, methods using printed circuit boards (PCBs) for temperature partitioned detection have gradually gained attention. Traditional temperature detection only detects the inlet and outlet temperatures of the stack, which cannot obtain the internal temperature distribution of the stack, making it difficult to explore the uneven internal temperature of the battery. PCBs are widely used in electronic devices and have good electrical and mechanical properties. In fuel cell temperature detection, integrating temperature sensors on PCBs can flexibly design the layout of the sensors based on the structural characteristics and temperature distribution of the stack, achieving accurate measurement of different region temperatures. Compared to traditional temperature detection methods, using PCBs for temperature partitioned detection has many advantages. On the one hand, the manufacturing process of PCBs is mature, allowing for high-precision processing that meets the requirements of the complex internal structure of fuel cells for temperature sensor layout. On the other hand, temperature sensors integrated on PCBs can be easily electrically connected to other electronic components, facilitating signal acquisition, processing, and transmission, which is beneficial for building a complete temperature monitoring system. Additionally, PCBs have relatively low costs, making them economically viable for large-scale applications. Existing temperature distribution detection methods are generally two-dimensional temperature distribution detection using PCBs, which can only detect the two-dimensional temperature distribution of a specific plane, such as the outer side of the bipolar plate or the end plate. However, this method cannot cover multiple planes perpendicular to the membrane electrode direction, where there is a significant temperature gradient (up to 10-20°C) in fuel cells. Therefore, current two-dimensional temperature distribution detection using PCBs cannot accurately capture the temperature characteristics of the core reaction area, lacks multi-plane and full-dimensional temperature data, and cannot explore the correlation between temperature gradient and stack efficiency, aging, and other performance indicators. This limits the in-depth analysis of the impact of temperature unevenness on stack performance and hinders the in-depth study of internal thermal management mechanisms. SUMMARY

[0006] In order to solve the problems and deficiencies in the prior art, the present application provides a fuel cell internal temperature three-dimensional distribution detection device and a fuel cell, which can simultaneously detect the temperature distribution of three different planes of the outside of the polar plate, the bottom of the flow channel and the place close to the membrane electrode with the same spatial resolution, accurately quantize the temperature gradient perpendicular to the membrane electrode direction, completely present the three-dimensional temperature field inside the stack, and provide key data for the correlation analysis of the heat distribution of the core reaction area and the stack performance, thereby helping to improve the stack efficiency and service life.

[0007] In order to achieve the above-mentioned application purposes, the technical scheme of the present application is as follows:

[0008] In one aspect, the present application discloses a fuel cell internal temperature three-dimensional distribution detection device, which comprises a temperature partition collection plate arranged on a polar plate of a fuel cell, wherein the temperature partition collection plate is provided with temperature collection modules, the temperature collection modules are arranged in multiple along the length extension direction of the flow channel of the polar plate, each temperature collection module comprises a first temperature sensor T1, a second temperature sensor T2 and a third temperature sensor T3 for collecting the temperature of the outside of the polar plate, the bottom of the flow channel of the polar plate and the bottom of the ridge of the flow channel of the polar plate, installation detection holes matched with the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3 are arranged at the corresponding positions of the outside of the polar plate, the bottom of the flow channel and the bottom of the ridge of the flow channel of the polar plate, the detection end of the temperature sensor is located in the installation detection hole, and the gap between the temperature sensor and the installation detection hole is filled with heat-conducting glue; the temperature partition collection plate and the polar plate are connected by conductive adhesive.

[0009] As a preferred, the temperature partition collection plate is arranged between the current collecting plate and the end polar plate of the fuel cell, the temperature collection modules on the temperature partition collection plate are uniformly arranged in multiple along the length extension direction of the flow channel on the end polar plate, the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3 in each temperature collection module are respectively used for collecting the temperature of the outside of the end polar plate, the bottom of the flow channel of the polar plate and the bottom of the ridge of the flow channel of the polar plate, installation detection holes matched with the temperature sensor T1, the temperature sensor T2 and the temperature sensor T3 are arranged at the corresponding positions of the outside of the end polar plate, the bottom of the flow channel and the bottom of the ridge of the flow channel of the polar plate, the detection end of the temperature sensor is located in the installation detection hole, and the gap between the temperature sensor and the installation detection hole is filled with heat-conducting glue; the temperature partition collection plate and the end polar plate are connected by conductive adhesive.

[0010] As preferred, the temperature partition acquisition plate is arranged on the bipolar plate of the fuel cell, and a plurality of temperature acquisition modules on the temperature partition acquisition plate are uniformly arranged along the length direction of the flow channel on the bipolar plate, wherein the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3 in each temperature acquisition module are respectively used for acquiring the temperature of the outside of the bipolar plate, the bottom of the flow channel of the bipolar plate and the bottom of the ridge of the flow channel of the bipolar plate, and the outside of the bipolar plate, the bottom of the flow channel and the bottom of the ridge of the flow channel are provided with installation detection holes matched with the temperature sensor T1, the temperature sensor T2 and the temperature sensor T3 at corresponding positions, the detection end of the temperature sensor is located in the installation detection hole, and the gap between the temperature sensor and the installation detection hole is filled with heat-conducting glue; and the temperature partition acquisition plate and the bipolar plate are connected by conductive adhesive.

[0011] As preferred, the end plate or the bipolar plate is provided with a metal via hole.

[0012] As preferred, the temperature partition acquisition plate is arranged between the cathode current collector plate and the cathode plate at the end.

[0013] As preferred, the temperature partition acquisition plate is arranged between the anode current collector plate and the anode plate at the end.

[0014] As preferred, the temperature partition acquisition plate is arranged on the anode plate surface and / or the cathode plate surface of the bipolar plate.

[0015] As preferred, the temperature partition acquisition plate is a PCB plate.

[0016] As preferred, the output pin of the temperature sensor is connected to the PCB plate, and the PCB plate is connected to the signal processing module.

[0017] Based on the same aspect, the application also discloses a fuel cell comprising the fuel cell internal temperature three-dimensional distribution detection device and assembled with an end plate and a fastener.

[0018] The application has the following advantages:

[0019] 1. The existing temperature detection device can only detect the two-dimensional temperature distribution of a single plane on the outside of the fuel cell plate, and cannot cover the temperature gradient perpendicular to the membrane electrode direction. The application synchronously acquires multi-plane temperature information through the temperature sensor layout at three key positions of the outside of the plate, the bottom of the flow channel and the bottom of the ridge of the flow channel, with the same spatial resolution (three groups of temperature data are synchronously acquired in each temperature partition), and first presents the three-dimensional temperature field in the fuel cell. Especially for the significant temperature gradient of 10-20℃ perpendicular to the membrane electrode direction, the gradient difference can be accurately quantified, and full-dimensional data support is provided for thermal management analysis.

[0020] 2、The detection device of the application can be flexibly deployed on the anode / cathode plate surface of the bipolar plate between the current collector plate and the end plate, and is suitable for single cell fuel cell and multi-cell stack structure of the stack; at the same time, whether the flow channel of the plate is straight or serpentine, the temperature acquisition module is uniformly arranged along the extension direction of the flow channel, without changing the overall assembly structure of the stack, and has strong compatibility.

[0021] 3、The temperature acquisition module of the application is uniformly arranged along the length direction of the flow channel, and completely covers the core reaction area of the fuel cell (including the anode hydrogen flow channel and the cathode air flow channel), so that the temperature fluctuation of different reaction areas can be monitored in real time. By comparing three groups of temperature data, the correlation between the temperature gradient and the stack efficiency, membrane electrode aging, etc. can be determined, data basis for targeted adjustment of the cooling strategy is provided, and the service life of the fuel cell membrane electrode is effectively prolonged.

[0022] 4、The temperature partition acquisition plate of the application adopts mature PCB manufacturing process, has high sensor integration (can be batch welded), and has low manufacturing cost; and the sensor selects a thermal sensor covering the interval of-30℃-90℃, can meet the detection requirements of full working condition such as low-temperature start-up of the fuel cell (-30-0℃), normal operation (60-80℃), etc., has strong stability (no performance attenuation for 3000h of continuous operation), has economy and engineering practicability, and is conducive to large-scale commercial application of the fuel cell.

[0023] 5、The temperature sensor of the application is filled with thermal conductive glue between the installation detection hole, which can eliminate gap thermal resistance, ensure the heat transfer efficiency between the sensor and the plate, and reduce the detection error.

[0024] 6、The temperature partition acquisition plate of the application adopts PCB material, and is connected with the plate through conductive adhesive, and at the same time, the PCB is provided with a metal via hole, so that the effective conduction of current between the current collector plate and the plate is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] The foregoing and subsequent specific description of the application becomes clearer when read in conjunction with the following drawings, in which:

[0026] Figure 1 It is a structure schematic view of the temperature three-dimensional distribution detection device of the application arranged between the cathode current collector plate and the cathode plate;

[0027] Figure 2 It is a structure schematic view of the temperature three-dimensional distribution detection device of the application arranged between the cathode current collector plate and the cathode plate;

[0028] Figure 3 It is a structure schematic view of the temperature three-dimensional distribution detection device of the application arranged between the cathode current collector plate and the cathode plate;

[0029] Figure 4Structure schematic view of temperature three-dimensional distribution detection device of the application arranged between cathode current collector plate and cathode plate and between anode current collector plate and anode plate;

[0030] Figure 5 Schematic view of temperature three-dimensional distribution detection device of the application arranged on bipolar plate;

[0031] Figure 6 Three-dimensional schematic view of temperature partition collection and flow channel corresponding relationship of the application;

[0032] Figure 7 Plane schematic view of temperature partition collection and flow channel corresponding relationship of the application;

[0033] Figure 8 Three-dimensional view of single partition temperature sensor distribution of the application;

[0034] Figure 9 Schematic view of temperature partition collection visualization result of the application.

[0035] In the figure:

[0036] 1, temperature collection module; A1, anode current collector plate; A2, anode plate; A3, flow channel; A4, membrane electrode; A5, cathode plate; A6, cathode current collector plate; A7, temperature partition collection plate; A8, conductive adhesive; A9, heat-conducting adhesive; A13, anode catalyst; A14, cathode catalyst; A15, metal via; K5, anode plate surface; K6, cathode plate surface; H4, plate. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the technical solutions in the application, the following will further illustrate the technical solutions for achieving the purposes of the application through several specific embodiments. It should be noted that the technical solutions claimed by the application include but are not limited to the following embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the application.

[0038] The embodiments of the application provide a fuel cell internal temperature three-dimensional distribution detection device, which will be explained and described in more detail in combination with specific embodiments.

[0039] Embodiment 1

[0040] The embodiment discloses a kind of fuel cell internal temperature three-dimensional distribution detection device, first, it needs to be explained that the fuel cell can only include a single cell, or include the stack formed by the stack of multiple single cells.But whether it is only a single cell fuel cell or the fuel cell containing stack, the reaction zone of the two end plates and the several bipolar plates located in the middle in the cell interior is respectively provided with flow channel A3, and flow channel ridge is arranged between the two adjacent flow channels A3.The end plate and the bipolar plate can be collectively referred to as the plate, and the flow channel A3 arranged on the cathode plate is air flow channel, and the flow channel A3 arranged on the anode plate is hydrogen flow channel.In the working process, hydrogen and oxygen enter the anode and cathode of the cell through the above-mentioned hydrogen flow channel and air flow channel respectively, hydrogen first reaches the gas distribution layer, then enters the catalyst layer, and then enters the proton exchange membrane, hydrogen ions can pass through the proton exchange membrane from the anode to the cathode, and electrons cannot pass directly through, but can flow through the external circuit.When the electrons flow in the external circuit, current is formed to generate electricity.The electrons return after generating electricity, and are recombined into hydrogen under the action of the catalyst, while oxygen and hydrogen combine to form water.

[0041] In the above working process, due to the temperature difference in each region inside the cell, local hot spots may occur in some parts.During the operation of the fuel cell, there are obvious differences in the temperature distribution near the outer side of the plate, the temperature distribution at the bottom of the flow channel and the temperature distribution at the bottom of the flow channel ridge.From the point of view of heat transfer and reaction process, the heat dissipation thermal resistance of the flow channel gas is greater than that of the ridge to the plate, so that the flow channel gas temperature is relatively high, and the temperature in the membrane under the flow channel is also relatively high, that is, the temperature at the bottom of the flow channel is relatively high.Because the heat is transferred to the outer side of the plate after a certain distance, part of the heat is conducted or lost, and the temperature fluctuation amplitude is smaller than that in the middle region of the membrane electrode. Because the bottom of the flow channel ridge is relatively not directly in contact with the gas in the flow channel, and the heat dissipation path is different from that of the bottom of the flow channel, the gas cannot take away heat as efficiently as in the flow channel, and the heat dissipation thermal resistance is relatively small, and heat is more easily lost, so that the temperature is usually lower than that at the bottom of the flow channel.

[0042] Because there is a significant temperature gradient and difference in the fuel cell perpendicular to the membrane electrode direction.Current PCB temperature detection technology is two-dimensional temperature distribution detection, which cannot accurately capture the temperature characteristics of the core reaction region, lacks multi-plane and full-dimensional temperature data, cannot explore the correlation between temperature gradient and stack efficiency, aging and other performance indicators, and cannot deeply analyze the influence of temperature unevenness on the performance of the stack, which limits the in-depth study of the internal thermal management mechanism of the cell.Therefore, the embodiment proposes a device for detecting the three-dimensional distribution of the internal temperature of the fuel cell.

[0043] As Figure 1As shown, the temperature three-dimensional distribution detection device is arranged on the polar plate H4 of the fuel cell, and can monitor the temperature distribution in the reaction area of the polar plate of the fuel cell in real time. The temperature three-dimensional distribution detection device comprises a temperature partition collection plate A7 arranged on the polar plate and a temperature collection module 1 arranged on the temperature partition collection plate A7. The temperature collection module 1 is arranged in multiple along the length direction of the flow channel A3 on the polar plate H4. Each temperature collection module 1 is composed of a first temperature sensor T1, a second temperature sensor T2 and a third temperature sensor T3. The three temperature sensors respectively collect the temperature of the outside of the polar plate H4, the bottom of the flow channel of the polar plate H4 and the bottom of the ridge of the flow channel of the polar plate H4. The temperature sensors are welded on the surface of the temperature partition collection plate A7. The polar plate H4 is processed by opening and digging at the positions corresponding to the sensor mounting points to form mounting detection holes which are matched with the temperature sensors. After the temperature partition collection plate A7 is mounted, the detection ends of the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3 are respectively accommodated in the corresponding mounting detection holes on the polar plate. The gap between each temperature sensor and the mounting detection hole is filled with heat-conducting glue A9 to ensure the effectiveness of heat transfer. The temperature partition collection plate A7 and the polar plate H4 are connected by conductive adhesive A8.

[0044] Embodiment 2

[0045] The embodiment discloses a device for detecting the three-dimensional temperature distribution inside a fuel cell. Based on the embodiment 1, the temperature three-dimensional distribution detection device is arranged between the current collector plate and the end polar plate of the fuel cell and is connected to the end polar plate by the conductive adhesive A8. Specifically, as shown in the figure, Figures 2-4 The temperature three-dimensional distribution detection device composed of the temperature partition collection plate A7 and the temperature collection module 1 arranged on the temperature partition collection plate A7 is arranged between the cathode current collector plate A6 and the cathode polar plate A5 at the cathode end and / or between the anode current collector plate A1 and the anode polar plate A2 at the anode end of the fuel cell.

[0046] When the temperature three-dimensional distribution detection device is arranged between the cathode current collector plate A6 and the cathode polar plate A5, the flow channel A3 corresponding to the detection of the temperature collection module 1 is the air flow channel arranged on the cathode polar plate A5. The temperature partition collection plate A7 and the cathode polar plate A5 are connected by the conductive adhesive A8. The outside, the bottom of the flow channel and the bottom of the ridge of the flow channel of the cathode polar plate A5 are provided with mounting detection holes for accommodating the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3.

[0047] When the temperature three-dimensional distribution detection device is located between the anode current collector plate A1 and the anode plate A2, the flow channel A3 corresponding to the detection of the temperature collection module 1 is the hydrogen flow channel arranged on the anode plate A2 of the fuel cell. The temperature partition collection plate A7 and the anode plate A2 are bonded together by using the conductive adhesive A8, and the anode plate A2 is provided with mounting detection holes for accommodating the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3 at the corresponding positions of the outer side, the flow channel bottom and the flow channel ridge bottom.

[0048] As shown in Figure 6 and 7 , a plurality of temperature collection modules 1 arranged uniformly and equidistantly along the length extension direction of the flow channel A3 form a plurality of temperature partition collection areas in the reaction area, which completely cover the core reaction area of the fuel cell, and the three-dimensional layout of the temperature sensors of the temperature collection module 1 corresponding to each temperature partition collection area is as shown in Figure 8 . Thus, each temperature partition collection area can obtain three temperature values, which are the temperature near the plate outer side, the flow channel bottom temperature and the flow channel ridge bottom temperature, and finally the three temperature values obtained by all temperature partition collection areas are integrated, and the temperature values belonging to the same part are as shown in Figure 9 , so that the temperature distribution diagram of three different parts of the fuel cell (under normal working conditions) can be obtained at the same time, wherein F1 represents the temperature distribution result near the plate outer side, F2 represents the flow channel bottom temperature distribution result, and F3 represents the flow channel ridge bottom temperature distribution result.

[0049] Thus, the whole temperature three-dimensional distribution detection device of the present application can simultaneously detect the temperature distribution of the plate outer side, the flow channel bottom and the membrane electrode (flow channel ridge bottom) at three different planes with the same spatial resolution, accurately quantify the temperature gradient perpendicular to the membrane electrode direction, and completely present the three-dimensional temperature field inside the stack, which can provide key data for the correlation analysis of the heat distribution of the core reaction area and the stack performance. The same spatial resolution means that each partition has three temperature sensors for collecting temperature data at three different planes. The temperature data of the three planes are composed of the same number of temperature parameters, achieving the same spatial resolution.

[0050] It can be understood that the temperature partition collection plate A7 is a multi-layer PCB, and the whole PCB has signal terminals outside the battery stack, and the signal terminals are used to guide the signal to the upper computer system. The output pins of each temperature sensor on the PCB are connected to the internal wiring of the PCB, and finally connected to the signal processing module of the external upper computer system through the signal terminals of the PCB.

[0051] The temperature sensor used in the application is generally a thermal sensor, and the resistance value has a certain sensitive interval with temperature change. The interval is preferably able to cover the main temperature interval that the fuel cell may experience: -30℃~90℃, covering the detection requirement of low-temperature start-up (-30~0℃), normal start-up to hot engine state (20~80℃), and rated working condition (60~80℃), etc.

[0052] Further, the structure and shape of the flow channel A3 can be straight flow channels arranged in parallel and at equal intervals, and a plurality of the straight flow channels are distributed on the polar plate; the flow channel A3 can also be a flow channel arranged in a serpentine manner. Regardless of the shape of the flow channel on the polar plate, the temperature acquisition module 1 is uniformly arranged along the length extension direction of the flow channel A3, achieving the effect of temperature partition acquisition and detection, and the temperature acquisition and detection of the device covers the entire reaction zone of the fuel cell. A flow channel ridge is arranged between two adjacent flow channels A3.

[0053] It should be noted that, since the contact surface of the temperature partition acquisition plate A7 and the polar plate needs to have a current collection function and be able to be conducted to the metal current collector on the outside, a metal via hole is arranged on the temperature partition acquisition plate A7. The temperature partition acquisition plate A7 of the application can collect current in other areas except the position of the temperature sensor, and conduct to the other side through the metal via hole.

[0054] Example 3

[0055] On the basis of example 1 or example 2, the above-mentioned temperature three-dimensional distribution detection device is arranged on the bipolar plate inside the fuel cell and is bonded to the bipolar plate through the conductive adhesive A8. First, the bipolar plate has an anode plate surface K5 and a cathode plate surface K6, the anode plate surface K5 is arranged on one surface of the bipolar plate of the fuel cell, and the anode reaction zone is formed between the hydrogen gas inlet and the hydrogen gas outlet of the anode plate surface K5, the anode reaction zone has a flow channel for hydrogen gas flow;

[0056] The cathode plate surface K6 is arranged on the other surface of the bipolar plate of the fuel cell, and the cathode plate surface K6 is provided with a cathode reaction zone, and the cathode reaction zone has an air flow channel.

[0057] Specifically, as shown in Figure 5 The temperature three-dimensional distribution detection device composed of the temperature partition acquisition plate A7 and the temperature acquisition module 1 arranged on the temperature partition acquisition plate A7 is arranged on the anode plate surface K5 and / or the cathode plate surface K6 of the bipolar plate.

[0058] When the temperature three-dimensional distribution detection device is located on the anode plate surface K5 of the bipolar plate, the flow channel A3 corresponding to the detection of the temperature collection module 1 is the hydrogen flow channel arranged on the anode plate surface. The temperature partition collection plate A7 is bonded together with the cathode plate using conductive adhesive A8, and the outer side of the cathode plate, the bottom of the flow channel and the corresponding positions of the ridge bottom of the flow channel are provided with mounting detection holes for accommodating the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3.

[0059] When the temperature three-dimensional distribution detection device is located on the anode plate surface K5 of the bipolar plate, the flow channel A3 corresponding to the detection of the temperature collection module 1 is the hydrogen flow channel arranged on the anode plate surface. The temperature partition collection plate A7 is bonded together with the cathode plate using conductive adhesive A8, and the outer side of the cathode plate, the bottom of the flow channel and the corresponding positions of the ridge bottom of the flow channel are provided with mounting detection holes for accommodating the first temperature sensor T1, the second temperature sensor T2 and the third temperature sensor T3.

[0060] Embodiment 4

[0061] The embodiment discloses a fuel cell, which internally comprises a single cell composed of an anode plate A2, a cathode plate A5 and a membrane electrode unit sandwiched between the anode plate A2 and the cathode plate A5, and the three components are combined to form the fuel cell. The membrane electrode unit is usually composed of a membrane electrode A4 (i.e. a proton exchange membrane) and anode catalyst A13 and cathode catalyst A14 distributed on both sides of the membrane electrode A4. The end plate assembly located at the cathode section comprises a cathode end plate, a cathode insulating plate and a cathode current collector plate A6 arranged in sequence, and the end plate assembly located at the anode section comprises an anode end plate, an anode insulating plate and an anode current collector plate A1 arranged in sequence.

[0062] The temperature three-dimensional distribution detection device composed of the temperature partition collection plate A7 and the temperature collection module 1 arranged on the temperature partition collection plate A7 is arranged between the cathode current collector plate A6 and the cathode plate A5 and / or between the anode current collector plate A1 and the anode plate A2.

[0063] Embodiment 5

[0064] The embodiment discloses a fuel cell, which internally comprises a stack formed by a plurality of single cells stacked together. The above-mentioned stack is sandwiched between two end plate assemblies, and the two current collector plates in the two end plate assemblies are respectively stacked together with the two single cells at the first end and the last end in the stack. The current collector plate at the anode end of the fuel cell is an anode current collector plate A1, and the current collector plate at the cathode end is a cathode current collector plate A6. The two end plates on both sides of the stack can be connected and fastened by a screw rod and a nut, and finally pressed together with the internal stack to form the fuel cell.

[0065] For the fuel cell formed by stacking the above-mentioned single cells, the temperature three-dimensional distribution detection device composed of the temperature partition collection plate A7 and the temperature collection module 1 arranged on the temperature partition collection plate A7 is arranged between the cathode current collector plate A6 and the cathode polar plate A5 and / or between the anode current collector plate A1 and the anode polar plate A2 and / or on the bipolar plate.

[0066] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0067] In the description of the present application, it is to be understood that the terms "set", "mount", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0068] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change made according to the technical essence of the present application to the above-mentioned embodiments falls within the scope of protection of the present application.

Claims

1. A three-dimensional temperature distribution detection device for the inside of a fuel cell, characterized in that, The device includes a temperature partition acquisition plate (A7) disposed between the current collector and the end plate of the fuel cell. The temperature partition acquisition plate (A7) is provided with a temperature acquisition module (1). Multiple temperature acquisition modules (1) are arranged along the length of the flow channel (A3) of the end plate. Each temperature acquisition module (1) includes a first temperature sensor (T1), a second temperature sensor (T2), and a third temperature sensor (T3) for acquiring the temperature of the outer side of the end plate, the bottom of the flow channel of the end plate, and the bottom of the ridge of the flow channel of the end plate. The end plate at the corresponding positions of the outer side of the end plate, the bottom of the flow channel, and the bottom of the flow channel ridge is provided with mounting detection holes that match the first temperature sensor (T1), the second temperature sensor (T2), and the third temperature sensor (T3). The detection end of the temperature sensor is located in the mounting detection hole, and the gap between the temperature sensor and the mounting detection hole is filled with thermally conductive adhesive (A9). The temperature partition acquisition plate (A7) and the end plate are bonded together with conductive adhesive (A8).

2. A three-dimensional temperature distribution detection device for the inside of a fuel cell, characterized in that, The device includes a temperature partition acquisition plate (A7) mounted on the bipolar plate of the fuel cell. The temperature partition acquisition plate (A7) is equipped with a temperature acquisition module (1). Multiple temperature acquisition modules (1) are arranged along the length of the flow channel (A3) of the bipolar plate. Each temperature acquisition module (1) includes a first temperature sensor (T1), a second temperature sensor (T2), and a third temperature sensor (T3) for acquiring the temperature of the outer side of the bipolar plate, the bottom of the flow channel of the bipolar plate, and the bottom of the ridge of the flow channel of the bipolar plate. The bipolar plate at the corresponding positions of the outer side of the bipolar plate, the bottom of the flow channel, and the bottom of the flow channel ridge is provided with mounting and detection holes that match the first temperature sensor (T1), the second temperature sensor (T2), and the third temperature sensor (T3). The detection end of the temperature sensor is located in the mounting and detection hole, and the gap between the temperature sensor and the mounting and detection hole is filled with thermally conductive adhesive (A9). The temperature partition acquisition plate (A7) and the bipolar plate are bonded together with conductive adhesive (A8).

3. A three-dimensional temperature distribution detection device for a fuel cell according to claim 1 or 2, characterized in that, The temperature acquisition module (1) is evenly arranged along the length of the flow channel (A3).

4. A three-dimensional temperature distribution detection device for a fuel cell according to claim 1 or 2, characterized in that, The end plate or bipolar plate is provided with metal through holes.

5. The three-dimensional temperature distribution detection device inside a fuel cell according to claim 1, characterized in that, The temperature zone acquisition board (A7) is located between the cathode current collector (A6) and the cathode plate (A5).

6. The three-dimensional temperature distribution detection device inside a fuel cell according to claim 1, characterized in that, The temperature zone acquisition board (A7) is located between the anode current collector (A1) and the anode plate (A2).

7. The three-dimensional temperature distribution detection device inside a fuel cell according to claim 2, characterized in that, The temperature zone acquisition board (A7) is disposed on the anode plate (K5) and / or cathode plate (K6) of the bipolar plate.

8. A three-dimensional temperature distribution detection device for a fuel cell according to claim 1 or 2, characterized in that, The temperature zone acquisition board (A7) is a PCB board.

9. The three-dimensional temperature distribution detection device inside a fuel cell according to claim 8, characterized in that, The output pin of the temperature sensor is connected to the PCB board, and the PCB board is connected to the signal processing module.

10. A fuel cell, characterized in that, It includes the three-dimensional temperature distribution detection device inside a fuel cell as described in claim 1 or 2, and is assembled with end plates and fasteners.

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