Collector plate and fuel cell

Abstract

The utility model provides a collector plate and a fuel cell, the collector plate comprises a collector plate body and a plurality of temperature sensors, the end face of the collector plate body, which is used for connecting a polar plate, is provided with a mounting groove, and the temperature sensors are arranged in the mounting groove. According to the collector plate disclosed by the utility model, the temperature sensors are arranged on the end surface, which is used for connecting the polar plate, of the collector plate body so as to obtain the heat of the polar plate when the fuel cell runs, and the distribution condition of the internal temperature of the fuel cell is further obtained through the plurality of temperature sensors; the end face of the collector plate body is provided with the mounting groove for mounting the temperature sensor, and the temperature sensor is arranged in the mounting groove to ensure the connection sealing performance of the collector plate body and the polar plate, so that the air tightness of the fuel cell is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell field, concretely relates to a current collection plate and fuel cell. BACKGROUND

[0002] Fuel cell is the device that chemical energy is converted into electric energy through hydrogen and oxygen electrochemical reaction. Fuel cell will produce a large amount of heat in the operation process, and the non-uniform heat dissipation in fuel cell will lead to the non-uniform temperature of fuel cell, thereby affecting the performance and life of fuel cell, and even will produce security risks. Therefore, the temperature condition in fuel cell needs to be acquired in the research and development test process of fuel cell, so as to adjust the heat dissipation structure. In the related technology, temperature sensor is arranged on the polar plate to acquire temperature, but the production difficulty is larger when temperature sensor is arranged on the polar plate, and the cost is higher and the time is longer in the test stage when temperature sensor is arranged on the polar plate of each structure to test. SUMMARY

[0003] The utility model aims at at least in certain extent solve one of the technical problems in the related art. Therefore, the embodiment of the utility model proposes a current collection plate, the current collection plate has temperature detection function.

[0004] The embodiment of the utility model also proposes a fuel cell with the current collection plate of the above embodiment.

[0005] The current collection plate of the embodiment of the utility model includes:

[0006] The current collection plate body is used to connect the end face of polar plate and is equipped with installation groove;

[0007] Temperature sensor, temperature sensor is arranged in the installation groove, and the temperature sensor is multiple.

[0008] The current collection plate of the embodiment of the utility model is arranged with temperature sensor on the end face of the current collection plate body for connecting polar plate to acquire the heat of polar plate when fuel cell operates, and further acquires the distribution of internal temperature of fuel cell through multiple temperature sensors, and the end face of the current collection plate body is equipped with installation groove for installing temperature sensor, and temperature sensor is arranged in the installation groove to ensure the connection sealing property of the current collection plate body and polar plate, so as to ensure the air tightness of fuel cell.

[0009] In some embodiments, the installation groove is grid-shaped, and multiple temperature sensors are detachably bonded in the installation groove.

[0010] In some embodiments, the busbar further comprises an electric wire, a wire channel is arranged on the side wall surface of the busbar body, the wire channel extends to the side surface of the installation slot and communicates with the installation slot, one end of the electric wire is arranged in the installation slot and connected with the temperature sensor, and the other end of the electric wire extends out of the busbar body through the wire channel and is used for connecting a temperature collector.

[0011] In some embodiments, the installation slot comprises a plurality of first slot bodies, the first slot bodies are strip-shaped and extend along the width direction of the busbar body, and the plurality of first slot bodies are arranged at intervals along the length direction of the busbar body.

[0012] In some embodiments, the installation slot comprises a plurality of second slot bodies, the second slot bodies are strip-shaped and extend along the length direction of the busbar body, and the plurality of second slot bodies are arranged at intervals along the width direction of the busbar body.

[0013] In some embodiments, a wire channel is arranged on the side wall surface of the busbar body, the wire channel extends to the side surface of the nearest second slot body and communicates with the nearest second slot body.

[0014] In some embodiments, the polar plate is provided with a flow channel, the polar plate comprises, in sequence along the flow direction of the medium in the flow channel, an inlet flow distribution area, an active reaction area and an outlet flow distribution area, the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the outlet flow distribution area is greater than the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the inlet flow distribution area.

[0015] In some embodiments, the active reaction area comprises, in sequence along the flow direction of the medium in the flow channel, an inlet main flow area and an outlet main flow area, the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the inlet main flow area is greater than or equal to the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the inlet flow distribution area, the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the outlet main flow area is greater than the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the outlet flow distribution area and greater than the number of the temperature sensors arranged in the area where the busbar body is arranged opposite to the inlet main flow area.

[0016] The fuel cell comprises:

[0017] A first end plate;

[0018] A second end plate, the second end plate is arranged at intervals and side by side with the first end plate;

[0019] A bipolar plate and a membrane electrode assembly are arranged between the first end plate and the second end plate.

[0020] A current collecting plate is arranged between the first end plate and the second end plate, and the current collecting plate is at least two, and the bipolar plate and the membrane electrode assembly are arranged between every two adjacent current collecting plates.

[0021] A temperature collector is electrically connected with the temperature sensor.

[0022] The fuel cell has the current collecting plate of the embodiment of the utility model, so that the distribution of the internal temperature of the fuel cell is obtained through the current collecting plate.

[0023] In some embodiments, the current collecting plates are arranged in at least three parallel and spaced rows, and the mounting slots and the temperature sensors are arranged at both ends of the thickness direction of the current collecting plates except the current collecting plates at both ends. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the current collecting plate of the embodiment of the utility model;

[0025] Figure 2 is Figure 1 is a side view of the current collecting plate;

[0026] Figure 3 is an explosion schematic view of the fuel cell of the embodiment of the utility model.

[0027] REFERENCE SIGNS:

[0028] 10, current collecting plate; 1, current collecting plate body; 2, mounting slot; 21, first slot body; 22, second slot body; 3, temperature sensor; 4, electric wire; 5, threading channel;

[0029] 20, first end plate; 30, second end plate; 40, bipolar plate and membrane electrode assembly; 50, temperature collector. DETAILED DESCRIPTION

[0030] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0031] The following refers to Figures 1-3 The current collecting plate and the fuel cell according to the embodiment of the utility model are described.

[0032] As Figure 1 and Figure 2As shown, the current collecting plate 10 comprises a current collecting plate body 1 and a temperature sensor 3.

[0033] The current collecting plate body 1 is provided with a mounting groove 2 on the end face for connecting the polar plate.

[0034] Specifically, as shown, Figure 1 As shown, the current collecting plate body 1 is used to be stacked and packaged as a fuel cell, and at least one end face of the current collecting plate body 1 along the thickness direction is used to connect the polar plate, in other words, the current collecting plate body 1 can be connected to the polar plate at one end along the thickness direction, or can be connected to the corresponding polar plate at both ends along the thickness direction.

[0035] The end face of the current collecting plate body 1 for connecting the polar plate is provided with the mounting groove 2 and the plurality of temperature sensors 3, the mounting groove 2 can be provided as one with a larger area, and the plurality of temperature sensors 3 are all arranged in the mounting groove 2, the mounting groove 2 can also be provided as a plurality, the plurality of temperature sensors 3 can be distributed in all the mounting grooves 2, or can be distributed in part of the mounting grooves 2, and the mounting groove 2 provided with the temperature sensor 3 is provided with only one temperature sensor 3.

[0036] By arranging the plurality of temperature sensors 3 at different positions in the mounting groove 2, or arranging the plurality of temperature sensors 3 in the mounting grooves 2 at different positions, the plurality of temperature sensors 3 are distributed at different positions of the end face of the current collecting plate body 1, so that the temperatures at different positions of the connected polar plate can be obtained after the current collecting plate 10 is stacked and packaged as a fuel cell, thereby the distribution of the internal temperature of the fuel cell can be obtained.

[0037] The temperature sensor 3 is preferably a T-shaped ultra-fine iron fluorine dragon thermocouple.

[0038] The current collecting plate of the embodiment of the utility model arranges the temperature sensor on the end face of the current collecting plate body for connecting the polar plate, so as to obtain the heat of the polar plate during the operation of the fuel cell, and further obtains the distribution of the internal temperature of the fuel cell through the plurality of temperature sensors, at the same time, the end face of the current collecting plate body is provided with the mounting groove for mounting the temperature sensor, and the temperature sensor is arranged in the mounting groove to ensure the connection sealing property of the current collecting plate body and the polar plate, thereby ensuring the air tightness of the fuel cell.

[0039] The current collecting plate of the embodiment of the utility model has at least two purposes.

[0040] The first application is as a testing device for electrode plates. The current collector and electrode plates are stacked and packaged into a fuel cell. During fuel cell operation, multiple temperature sensors on the current collector acquire the internal temperature distribution of the fuel cell. Based on this temperature distribution, the suitability of the electrode plate's heat dissipation structure is determined, and adjustments are made to the design if necessary. For example, if a certain area of ​​the fuel cell exhibits abnormally high temperature, the location and parameters of the cooling water channels in that area can be adjusted, or the relative positions of the cooling water and gas channels can be changed. The adjusted electrode plate is then tested again. In this first application, since multiple temperature sensors are located within the mounting slots of the current collector body, it is unnecessary to process each electrode plate to install temperature sensors. The electrode plates and current collector are simply stacked and packaged into a fuel cell, thus reducing the cost and time of electrode plate testing. Furthermore, the lower manufacturing difficulty of the current collector also reduces the manufacturing difficulty and cost of the testing equipment.

[0041] The second application is for monitoring fuel cells. During the operation of the fuel cell, multiple temperature sensors acquire and monitor the temperature distribution inside the fuel cell in real time. When the temperature distribution inside the fuel cell becomes abnormal, such as when the temperature in a certain area of ​​the fuel cell is abnormally high, the terminal device electrically connected to the multiple temperature sensors will issue an alarm signal to remind the user. Furthermore, it can also control the fuel cell to stop operating in order to avoid safety hazards.

[0042] In some embodiments, the mounting groove 2 is mesh-shaped, and multiple temperature sensors 3 are detachably attached to the mounting groove 2.

[0043] like Figure 1 As shown, the mounting slot 2 is grid-shaped, and multiple temperature sensors 3 are all located in the grid-shaped mounting slot 2. The temperature sensors 3 can be located at any position in the mounting slot 2, and the grid-shaped mounting slot 2 provides a large range of installable positions for the temperature sensors 3.

[0044] The temperature sensor 3 is detachably attached to the mounting slot 2 to facilitate the installation and removal of the temperature sensor 3 and the adjustment of its mounting position. The temperature sensor 3 can be attached to the mounting slot 2 using double-sided adhesive or tape.

[0045] It is understood that the mounting slots are not limited to a grid shape. In other embodiments, the mounting slots are circular to accommodate the temperature sensor 3, and multiple mounting slots are evenly distributed on the end face of the collector plate body.

[0046] In some embodiments, the current collecting plate 10 of the utility model further comprises an electric wire 4, the side wall surface of the current collecting plate body 1 is provided with a wire passing channel 5, the wire passing channel 5 extends to the groove side surface of the mounting groove 2 and is communicated with the mounting groove 2, one end of the electric wire 4 is arranged in the mounting groove 2 and is connected with the temperature sensor 3, the other end of the electric wire 4 extends out of the current collecting plate body 1 through the wire passing channel 5 and is used for connecting the temperature collector 50.

[0047] As shown in Figure 1 and Figure 2 , the temperature sensor 3 has a detection end and a wiring end, the wiring end is connected with the electric wire 4, the electric wire 4 is used for connecting the temperature collector 50, so that the temperature information acquired by the temperature sensor 3 is transmitted to the temperature collector 50, preferably, the temperature collector 50 is connected with all the temperature sensors 3 through the electric wire 4, so that the temperature information transmitted by all the temperature sensors 3 is acquired, and all the temperature information can be stored, analyzed and displayed.

[0048] At least one side wall surface of the current collecting plate body 1 along the width direction (such as the front-rear direction shown in Figure 1 , the wire passing channel 5 extends into the current collecting plate body 1 along the front-rear direction and extends to the grid-shaped mounting groove 2 and the most adjacent groove side surface thereof, so that the wire passing channel 5 is communicated with the mounting groove 2, the wire passing channel 5 can be provided as one or a plurality of intervals along the left-right direction.

[0049] One end of the electric wire 4 is connected with the temperature sensor 3 in the mounting groove 2, and the other end extends out of the current collecting plate body 1 through the wire passing channel 5 and is connected with the temperature collector 50, preferably, the electric wire 4 is detachably connected with the mounting groove 2. The electric wire 4 can also be provided as one and connected with all the temperature sensors 3, can also be provided as a plurality of one-to-one corresponding connections with the temperature sensors 3, and can also be a plurality of, and each electric wire 4 is connected with a corresponding part of the temperature sensor 3.

[0050] The wire passing channel 5 is provided to extend from the side wall surface of the current collecting plate body 1 to the groove side surface of the mounting groove 2, which can ensure the air tightness of the current collecting plate 10 after being connected with the polar plate, thereby ensuring the air tightness of the fuel cell. The mounting groove 2 is provided in a grid shape, which can facilitate the arrangement of the electric wire 4.

[0051] It can be understood that when the mounting groove is provided as a plurality of, each mounting groove is provided with a corresponding wire passing channel.

[0052] It can be understood that the temperature sensor is not limited to being connected with the temperature collector through the electric wire, in other embodiments, the temperature sensor is connected with the temperature collector through a wireless signal, at this time, the mounting groove can not be provided in a grid shape.

[0053] In some embodiments, the installation groove 2 includes a plurality of first groove bodies 21 extending in the width direction (e.g., the front-rear direction as shown) of the current collector body 1, and the plurality of first groove bodies 21 are arranged in the length direction (e.g., the left-right direction as shown) of the current collector body 1. Figure 1 In some embodiments, the installation groove 2 includes a plurality of second groove bodies 22 extending in the length direction of the current collector body 1, and the plurality of second groove bodies 22 are arranged in the width direction of the current collector body 1. Figure 1

[0054] In some embodiments, the installation groove 2 includes a plurality of second groove bodies 22 extending in the length direction of the current collector body 1, and the plurality of second groove bodies 22 are arranged in the width direction of the current collector body 1.

[0055] As shown in FIG. 1, the installation groove 2 includes a plurality of first groove bodies 21 extending in the front-rear direction and a plurality of second groove bodies 22 extending in the left-right direction, and the plurality of first groove bodies 21 and the plurality of second groove bodies 22 are arranged in a grid pattern. Figure 1 The temperature sensor 3 can be arranged at the communication between the first groove body 21 and the second groove body 22, at the portion of the first groove body 21 between two communications, or at the portion between the end of the first groove body 21 and the nearest communication, and can also be arranged at the portion of the second groove body 22 between two communications, or at the portion between the end of the second groove body 22 and the nearest communication.

[0056] It can be understood that the structure of the grid-shaped installation groove is not limited to the structure as shown in FIG. 1, and in other embodiments, the groove bodies of the installation groove extend in the front-rear direction and are arranged obliquely in the left-right direction.

[0057] Figure 1 It can be understood that the installation groove is not limited to be in a grid pattern, and in other embodiments, the installation groove includes a plurality of first groove bodies, and the temperature sensor is arranged in different first groove bodies to detect the temperature of different areas in the left-right direction, or the temperature sensor is arranged at different positions of the first groove body to detect the temperature of different areas in the front-rear direction. Alternatively, the installation groove includes a plurality of second groove bodies, and the temperature sensor is arranged in different second groove bodies to detect the temperature of different areas in the front-rear direction, or the temperature sensor is arranged at different positions of the second groove body to detect the temperature of different areas in the left-right direction.

[0058] In some embodiments, the side wall surface of the current collector body 1 is provided with a threading channel 5 extending to the groove side surface of the nearest second groove body 22 and communicating with the nearest second groove body 22.

[0059] As shown in FIG. 1, the installation groove 2 includes a plurality of first groove bodies 21 extending in the front-rear direction and a plurality of second groove bodies 22 extending in the left-right direction, and the plurality of first groove bodies 21 and the plurality of second groove bodies 22 are arranged in a grid pattern.

[0060] As shown in FIG. 1, the installation groove 2 includes a plurality of first groove bodies 21 extending in the front-rear direction and a plurality of second groove bodies 22 extending in the left-right direction, and the plurality of first groove bodies 21 and the plurality of second groove bodies 22 are arranged in a grid pattern. Figure 1 ​​As shown, the busbar body 1 is provided with a threading channel 5 on the side wall surface of the front side, the threading channel 5 extends to the groove side surface of the second groove body 22 at the front end along the front-rear direction and communicates with the second groove body 22, thereby communicating with the grid-shaped mounting groove 2.

[0061] In some embodiments, the polar plate is provided with a flow channel, the polar plate includes an inlet flow distribution area, an active reaction area and an outlet flow distribution area arranged in sequence along the flow direction of the medium in the flow channel, the number of temperature sensors 3 arranged in the region of the busbar body 1 opposite to the outlet flow distribution area is greater than the number of temperature sensors 3 arranged in the region of the busbar body 1 opposite to the inlet flow distribution area.

[0062] Specifically, the polar plate includes an anode plate and a cathode plate, the anode plate is provided with flow channels extending along the left-right direction at both ends in the thickness direction, the flow channel at one end is used for hydrogen flow, and the flow channel at the other end is used for cooling water flow, the cathode plate is provided with flow channels extending along the left-right direction at both ends in the thickness direction, the flow channel at one end is used for oxygen or air flow, and the flow channel at the other end is used for cooling water flow.

[0063] The left end of the polar plate and the busbar body 1 is provided with a hydrogen inlet, a cooling water inlet and an oxygen or air inlet corresponding to the communication, and the right end is provided with a hydrogen outlet, a cooling water outlet and an oxygen or air outlet corresponding to the communication, the hydrogen flow channel is connected between the hydrogen inlet and the hydrogen outlet, the cooling water flow channel is connected between the cooling water inlet and the cooling water outlet, and the oxygen or air flow channel is connected between the oxygen or air inlet and the oxygen or air outlet. The mounting groove 2 is located between the hydrogen inlet, the cooling water inlet and the oxygen or air inlet at the left end of the busbar body 1 and the hydrogen outlet, the cooling water outlet and the oxygen or air outlet at the right end.

[0064] The polar plate is provided with an inlet flow distribution area, an active reaction area and an outlet flow distribution area arranged in sequence from left to right, and the inlet flow distribution area, the active reaction area and the outlet flow distribution area are located between the hydrogen inlet, the cooling water inlet and the oxygen or air inlet at the left end of the polar plate and the hydrogen outlet, the cooling water outlet and the oxygen or air outlet at the right end, therefore, the inlet flow distribution area, the active reaction area and the outlet flow distribution area are opposite to the mounting groove 2.

[0065] The number of temperature sensors 3 arranged in the region of the busbar body 1 opposite to the outlet flow distribution area is greater than the number of temperature sensors 3 arranged in the region of the busbar body 1 opposite to the inlet flow distribution area, since the temperature of the outlet flow distribution area is higher than that of the inlet flow distribution area, it is more likely to cause partial area temperature abnormally high, therefore, more temperature sensors 3 are arranged in the region corresponding to the outlet flow distribution area to ensure that the detection area can cover the outlet flow distribution area.

[0066] Preferably, the area where the current collector plate body 1 is opposite to the inlet flow distribution area is provided with 2-5 temperature sensors 3, and the area where the current collector plate body 1 is opposite to the outlet flow distribution area is provided with 3-6 temperature sensors 3, so as to ensure the accuracy of obtaining the temperature distribution.

[0067] In some embodiments, the active reaction zone comprises an inlet main flow area and an outlet main flow area arranged in sequence along the direction of the medium flow in the flow channel, the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet main flow area is greater than or equal to the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet flow distribution area, and the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the outlet main flow area is greater than the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the outlet flow distribution area, and is greater than the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet main flow area.

[0068] Specifically, the active reaction zone comprises an inlet main flow area and an outlet main flow area arranged in sequence from left to right, the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet main flow area can be greater than the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet flow distribution area, or can be consistent with the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet flow distribution area. The number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the outlet main flow area is greater than the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the outlet flow distribution area, and the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the outlet main flow area is greater than the number of temperature sensors 3 arranged in the area where the current collector plate body 1 is opposite to the inlet main flow area. Since the relative temperature of the outlet main flow area is relatively high, and the area is larger than the outlet flow distribution area, it is more likely to cause partial area temperature to be abnormally high, so the maximum number of temperature sensors 3 is arranged in the outlet main flow area to ensure that the detection area can cover the outlet flow distribution area.

[0069] Preferably, the area where the current collector plate body 1 is opposite to the inlet main flow area is provided with 2-5 temperature sensors 3, and the area where the current collector plate body 1 is opposite to the outlet main flow area is provided with 10-16 temperature sensors 3, so as to ensure the accuracy of obtaining the temperature distribution.

[0070] Further, when the end surface of the temperature sensor 3 is connected to the anode plate, the temperature sensor 3 is opposite to the hydrogen flow channel, in other words, the projection of the temperature sensor 3 on the anode plate is located in the hydrogen flow channel. When the end surface of the temperature sensor 3 is connected to the cathode plate, the temperature sensor 3 is opposite to the hydrogen or air flow channel, in other words, the projection of the temperature sensor 3 on the cathode plate is located in the hydrogen or air flow channel. So as to ensure the accuracy of obtaining the temperature distribution.

[0071] As Figures 1-3As shown, the fuel cell of the embodiment of the present application comprises a first end plate 20, a second end plate 30, bipolar plates and membrane electrode assemblies 40, current collecting plates 10 and a temperature collector 50.

[0072] The second end plate 30 is arranged side by side and spaced apart from the first end plate 20. The bipolar plates and membrane electrode assemblies 40 are arranged between the first end plate 20 and the second end plate 30. The current collecting plate 10 is the current collecting plate 10 of the embodiment of the present application, and the current collecting plate 10 is arranged between the first end plate 20 and the second end plate 30. The current collecting plate 10 is at least two, and the bipolar plates and membrane electrode assemblies 40 are arranged between each adjacent two current collecting plates 10. The temperature collector 50 is electrically connected with the temperature sensor 3.

[0073] Specifically, the second end plate 30 is arranged side by side and spaced apart from the first end plate 20, and a plurality of bipolar plates and membrane electrode assemblies 40 and at least two current collecting plates 10 are stacked between the second end plate 30 and the first end plate 20. Each bipolar plate and membrane electrode assembly 40 is arranged between the corresponding adjacent two current collecting plates 10, and only one bipolar plate and membrane electrode assembly 40 is arranged between the adjacent two current collecting plates 10. Therefore, one current collecting plate 10 is stacked at one end of the second end plate 30 towards the first end plate 20, and another current collecting plate 10 is stacked at one end of the first end plate 20 towards the second end plate 30.

[0074] The mounting groove 2 and the plurality of temperature sensors 3 are arranged on the end face of the current collecting plate body 1 connected with the bipolar plates and membrane electrode assemblies 40, so as to obtain the temperature distribution of the corresponding bipolar plates and membrane electrode assemblies 40. All the temperature sensors 3 of all the current collecting plates 10 are respectively connected with the same temperature collector 50 through the electric wires 4, and the distribution of the internal temperature of the fuel cell is obtained through the plurality of current collecting plates 10.

[0075] The fuel cell of the embodiment of the present application has the current collecting plate of the embodiment of the present application, so as to obtain the distribution of the internal temperature of the fuel cell through the current collecting plate.

[0076] Further, the current collecting plate 10 is arranged as at least three arranged side by side and spaced apart. Except for the current collecting plates 10 located at both ends, the remaining current collecting plates 10 are provided with the mounting groove 2 and the temperature sensor 3 at both ends along the thickness direction thereof.

[0077] Preferably, the current collecting plate 10 is arranged as three, and the bipolar plates and membrane electrode assemblies 40 are arranged as two. The fuel cell comprises the first end plate 20, the first current collecting plate 10, the first bipolar plate and membrane electrode assembly 40, the second current collecting plate 10, the second bipolar plate and membrane electrode assembly 40, the third current collecting plate 10 and the second end plate 30 stacked in sequence.

[0078] The first current collector plate 10 is provided with a mounting groove 2 and a plurality of temperature sensors 3 on the end face facing the first bipolar plate and membrane electrode assembly 40, the third current collector plate 10 is provided with a mounting groove 2 and a plurality of temperature sensors 3 on the end face facing the second bipolar plate and membrane electrode assembly 40, and the second current collector plate 10 is provided with a mounting groove 2 and a plurality of temperature sensors 3 on both end faces along the thickness direction thereof.

[0079] Further, the fuel cell further comprises an insulating plate, one insulating plate is arranged between the first end plate 20 and the first current collector plate 10, and another insulating plate is arranged between the second end plate 30 and the third current collector plate 10.

[0080] The utility model embodiment further provides a kind of fuel cell internal temperature detection method, comprising the following steps.

[0081] The position of temperature sensor 3 on current collector plate body 1 is determined according to the flow channel of bipolar plate, and temperature sensor 3 is arranged in mounting groove 2 on the end face of current collector plate body 1.

[0082] Specifically, temperature sensor 3 is arranged according to inlet flow distribution area, active reaction area and outlet flow distribution area, further, temperature sensor 3 is arranged according to inlet flow distribution area, inlet main flow area, outlet main flow area and outlet flow distribution area, preferably, 2-5 temperature sensors 3 are arranged in the region of current collector plate body 1 opposite to inlet flow distribution area, 3-6 temperature sensors 3 are arranged in the region of current collector plate body 1 opposite to outlet flow distribution area, 2-5 temperature sensors 3 are arranged in the region of current collector plate body 1 opposite to inlet main flow area, and 10-16 temperature sensors 3 are arranged in the region of current collector plate body 1 opposite to outlet main flow area, and temperature sensor 3 is bonded in mounting groove 2.

[0083] Stacked package fuel cell.

[0084] Specifically, first end plate 20, second end plate 30, a plurality of bipolar plates and membrane electrode assemblies 40 and at least two current collector plates 10 are stacked and packaged as fuel cell. Further, first end plate 20, second end plate 30, a plurality of bipolar plates and membrane electrode assemblies 40, at least two current collector plates 10 and insulating plate are stacked and packaged as fuel cell.

[0085] The fuel cell is subjected to air tightness test, and when the air tightness of the fuel cell is qualified, temperature sensor 3 is electrically connected with temperature collector 50.

[0086] Specifically, the fuel cell is subjected to air tightness test, if the air tightness is unqualified, the fuel cell is re-stacked and packaged, if the air tightness is qualified, all temperature sensors 3 are connected with temperature collector 50 through wire 4.

[0087] The cooling water of a known temperature is supplied to the fuel cell, and the temperature sensor 3 is calibrated according to the temperature displayed by the temperature collector 50.

[0088] Specifically, the fuel cell is in an offline state, in other words, the fuel cell is in a state of stopping operation. The cooling water of a known temperature is continuously supplied to the fuel cell, and the cooling water is preferably 60℃. The cooling water flows through the cooling water inlet, the cooling water flow channel and the cooling water outlet in sequence, and then is discharged from the fuel cell, and each bipolar plate and the membrane electrode assembly 40 has the cooling water flowing therethrough. The temperature acquired by each temperature sensor 3 is collected by the temperature collector 50 and compared with the temperature of the cooling water, and the temperature sensor 3 acquiring an abnormal temperature is adjusted or replaced to ensure that the accuracy of the temperature sensor is ±0.2℃.

[0089] The fuel cell is operated, and the internal temperature of the fuel cell is acquired by the temperature sensor 3 and the temperature collector 50.

[0090] Specifically, the cooling water, hydrogen and air or oxygen are supplied to the fuel cell, and the fuel cell is started to operate. During the operation of the fuel cell, the temperature sensor 3 acquires the temperature in real time, and the acquired temperature is transmitted to the temperature collector 50 through the wire 4. The temperature collector 50 receives the temperature acquired by all the temperature sensors 3, and can store, analyze and display all the temperature information to obtain the distribution of the internal temperature of the fuel cell.

[0091] Therefore, the fuel cell internal temperature detection method can acquire the distribution of the internal temperature of the fuel cell through the temperature sensor on the current collector body.

[0092] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "front", "back", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship 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 therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0093] In addition, the terms "first", "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0094] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, can understand the concrete meaning of above terms in the utility model according to specific circumstances.

[0095] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can be that first and second features directly contact, or first and second features indirectly contact through intermediate medium.Moreover, first feature "over", "above" and "on" second feature can be that first feature is directly above or obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature.First feature "under", "below" and "under" second feature can be that first feature is directly below or obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0096] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0097] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the changes, modifications, replacements and variations of the above embodiments made by the ordinary skilled in the art are within the protection scope of the utility model.

Claims

1. A current collector plate characterized by, It includes: The busbar body (1) is provided with a mounting groove (2) on the end face of the connecting plate; The temperature sensor (3) is provided in the mounting groove (2), and the temperature sensor (3) is multiple; The connecting plate is provided with a flow channel, and the connecting plate includes an inlet flow distribution area, an active reaction area and an outlet flow distribution area arranged in sequence along the medium flow direction in the flow channel, the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the outlet flow distribution area is greater than the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the inlet flow distribution area.

2. The current collector plate according to claim 1, characterized by The mounting groove (2) is grid-shaped, and a plurality of temperature sensors (3) are detachably bonded in the mounting groove (2).

3. The current collector plate of claim 1, wherein It also includes an electric wire (4), a side wall surface of the busbar body (1) is provided with a wire passing channel (5), the wire passing channel (5) extends to the groove side surface of the mounting groove (2) and communicates with the mounting groove (2), one end of the electric wire (4) is arranged in the mounting groove (2) and connected with the temperature sensor (3), the other end of the electric wire (4) extends out of the busbar body (1) through the wire passing channel (5) for connecting a temperature collector (50).

4. The current collector plate of claim 1, wherein The mounting groove (2) includes a plurality of first groove bodies (21), the first groove body (21) is strip-shaped extending along the width direction of the busbar body (1), and a plurality of first groove bodies (21) are arranged in the length direction of the busbar body (1) with intervals.

5. The current collector plate according to claim 1 or 4, characterized by The mounting groove (2) includes a plurality of second groove bodies (22), the second groove body (22) is strip-shaped extending along the length direction of the busbar body (1), and a plurality of second groove bodies (22) are arranged in the width direction of the busbar body (1) with intervals.

6. The current collector plate according to claim 5, characterized by The side wall surface of the busbar body (1) is provided with a wire passing channel (5), the wire passing channel (5) extends to the groove side surface of the nearest second groove body (22) and communicates with the nearest second groove body (22).

7. The current collector plate of claim 1, wherein The active reaction area includes an inlet main flow area and an outlet main flow area arranged in sequence along the medium flow direction in the flow channel, the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the inlet main flow area is greater than or equal to the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the inlet flow distribution area, the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the outlet main flow area is greater than the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the outlet flow distribution area, and greater than the number of temperature sensors (3) arranged in the region of the busbar body (1) opposite to the inlet main flow area.

8. A fuel cell characterized by comprising: It includes: The first end plate (20); The second end plate (30) is arranged in parallel and with intervals with the first end plate (20); A bipolar plate and membrane electrode assembly (40) is arranged between the first end plate (20) and the second end plate (30); A current collector plate (10) is the current collector plate according to any one of claims 1-7, and the current collector plate (10) is arranged between the first end plate (20) and the second end plate (30), and there are at least two current collector plates (10), and the bipolar plate and membrane electrode assembly (40) is arranged between every two adjacent current collector plates (10). A temperature collector (50) is electrically connected with the temperature sensor (3).

9. The fuel cell of claim 8, wherein The current collector plates (10) are arranged in at least three parallel and spaced rows, and the remaining current collector plates (10) are provided with the mounting grooves (2) and the temperature sensors (3) at both ends along the thickness direction thereof, except for the current collector plates (10) located at both ends.

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