Miniature film thermocouple sensing system for transient temperature measurement of fuel cell

Abstract

The invention discloses a micro film thermocouple sensing system for transient temperature measurement of a fuel cell, which comprises a fuel cell panel, a film thermocouple, a copper buckle and a temperature compensation line, a NiSi top electrode film and a NiCr bottom electrode film are sequentially arranged on the film thermocouple from top to bottom, one end, far away from the fuel cell panel, of the copper buckle is connected with the temperature compensation line through a small hole, and the other end of the copper buckle is connected with the temperature compensation line through a small hole. The copper buckle is tightly connected with the thin film thermocouple through the groove, the thin film thermocouple is deposited on the fuel cell panel through a magnetron sputtering technology, and the NiSi top electrode thin film and the NiCr bottom electrode thin film are arranged in a coating deposition mode. The thin film thermocouple is directly deposited on the fuel cell plate through the magnetron sputtering technology, stability is improved, the NiCr bottom electrode thin film and the NiSi top electrode thin film are innovative coating deposition modes, reliable safety protection is provided while transient temperature measurement is completed, the copper buckle is tightly buckled with the thin film thermocouple through the ingenious groove design, the sealing performance of a galvanic pile is not affected, and the reliability of the galvanic pile is improved. And the safety of the fuel cell is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thin film thermocouple temperature sensors, in particular to a micro thin film thermocouple sensing system for transient temperature measurement of a fuel cell. Background Art

[0002] Fuel cells, as one of the most important representatives of clean energy, have broad application prospects in the energy sector. However, the operating temperature of fuel cells is one of the key factors affecting their performance. Certain components of fuel cells, such as electrodes and membrane materials, may undergo physical or chemical changes at high temperatures, leading to damage to the cell structure. This damage not only degrades cell performance but can also cause short circuits or other electrical failures, further increasing the risk of explosion. In practical applications, fuel cell systems are typically equipped with temperature sensors and control systems to monitor and regulate cell temperature. However, if these systems malfunction or fail to respond in a timely manner, the cell temperature may rise rapidly, exceeding safety thresholds. Once the cell temperature exceeds its design limit, it may trigger a chain reaction, causing a sharp increase in internal pressure in the cell, which may eventually cause an explosion. The internal temperature of the fuel cell is affected by the external environment and operating conditions. Therefore, a temperature measurement system that can quickly respond to temperature changes is required to ensure the safe and stable operation of the fuel cell.

[0003] However, existing fuel cell temperature measurement technology lacks reliability, test results are easily affected by the monitoring environment, and there are requirements for whether it affects the sealing of the fuel cell stack. When the fuel cell is in service, it is difficult to achieve reliable real-time monitoring of the fuel cell temperature while ensuring the battery sealing. Summary of the Invention

[0004] In order to solve the above technical problems, a micro-thin film thermocouple sensing system for transient temperature measurement of fuel cells is provided. This technical solution solves the problem that the existing fuel cell temperature measurement technology proposed in the above background technology is insufficient in reliability, the test results are easily affected by the monitoring environment, and there are requirements for whether it affects the sealing of the fuel cell stack. When the fuel cell is in service, it is difficult to achieve reliable real-time monitoring of the fuel cell temperature while ensuring the battery sealing.

[0005] In order to achieve the above objects, the technical solution adopted by the present invention is:

[0006] A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell comprises a fuel cell plate, a thin film thermocouple, a copper buckle and a temperature compensation wire. A NiSi top electrode film and a NiCr bottom electrode film are sequentially arranged on the thin film thermocouple from top to bottom. An end of the copper buckle away from the fuel cell plate is connected to the temperature compensation wire via a small hole. The copper buckle is tightly connected to the thin film thermocouple via a groove. The thin film thermocouple is deposited on the fuel cell plate via magnetron sputtering technology. The NiSi top electrode film and the NiCr bottom electrode film are both arranged by a coating deposition method. The temperature compensation wire comprises a NiSi compensation wire and a NiCr compensation wire. The copper buckle is provided with two groups, namely a first copper connector and a second copper connector. The NiSi compensation wire is connected to the first copper connector, and the NiCr compensation wire is connected to the second copper connector.

[0007] Preferably, the fuel cell plate is used to convert chemical energy directly into electrical energy.

[0008] Preferably, the NiSi top electrode film and the NiCr bottom electrode film overlap at a position close to the center line of the thin film thermocouple.

[0009] Preferably, the thin film thermocouples are evenly distributed on the fuel cell plate.

[0010] Preferably, the first copper connector and the second copper connector are both straight plate structures, and the tails of the first copper connector and the second copper connector are both provided with small holes, and the NiSi compensation wire and the NiCr compensation wire pass through the small holes at the tail ends of the first copper connector and the second copper connector respectively.

[0011] Preferably, the NiSi top electrode film and the NiCr bottom electrode film consist of oblique edges and transverse edges, and the angle between the oblique edges and the transverse edges is 135 degrees.

[0012] Compared with the prior art, the present invention provides a micro-thin film thermocouple sensing system for transient temperature measurement of fuel cells, which has the following beneficial effects:

[0013] The present invention deposits thin-film thermocouples directly onto fuel cell plates using magnetron sputtering technology, significantly improving stability. The NiCr bottom electrode thin film and NiSi top electrode thin film are innovative coating deposition methods that provide reliable safety protection while completing transient temperature measurement. The copper buckle is tightly coupled to the thin-film thermocouple through an ingenious groove design, without affecting the sealing of the fuel cell stack, thereby improving the safety of the fuel cell. The temperature compensation wire passes through the small hole of the copper buckle and connects to the copper buckle, achieving regular transient temperature measurement of the fuel cell plate without affecting the sealing of the fuel cell stack. The use of thin-film thermocouples to measure temperature changes in fuel cells has the characteristics of fast response and high accuracy, playing an important role in protecting the safety of people's lives and property, and promoting the rapid development of the new energy industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the present invention;

[0015] Figure 2 Schematic diagram of the overall structure of the thin film thermocouple, copper buckle and temperature compensation wire in the present invention;

[0016] Figure 3 This is a structural diagram of the thin film thermocouple, copper buckle and temperature compensation wire in the present invention from another perspective;

[0017] Figure 4 Schematic diagram of the structure of the NiSi top electrode film and the NiCr bottom electrode film in the present invention;

[0018] Figure 5 A top view of the fuel cell plate and thin film thermocouple in the present invention.

[0019] The numbers in the figure are:

[0020] 1. Fuel cell plate; 2. Thin film thermocouple; 201. NiSi top electrode thin film; 202. NiCr bottom electrode thin film; 3. Copper buckle; 301. First copper connector; 302. Second copper connector; 4. Temperature compensation wire; 401. NiSi compensation wire; 402. NiCr compensation wire. DETAILED DESCRIPTION

[0021] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0022] Please refer to Figure 1-Figure 5As shown, a micro thin film thermocouple sensing system for transient temperature measurement of a fuel cell includes a fuel cell plate 1, a thin film thermocouple 2, a copper buckle 3 and a temperature compensation line 4. A NiSi top electrode film 201 and a NiCr bottom electrode film 202 are sequentially arranged on the thin film thermocouple 2 from top to bottom. The end of the copper buckle 3 away from the fuel cell plate 1 is connected to the temperature compensation line 4 through a small hole. The copper buckle 3 is tightly connected to the thin film thermocouple 2 through a groove. The thin film thermocouple 2 is deposited on the fuel cell plate 1 by magnetron sputtering technology. The NiSi top electrode film 201 and the NiCr bottom electrode film 202 are both arranged by coating deposition.

[0023] It is understood by those skilled in the art that magnetron sputtering is a physical vapor deposition (PVD) technique used for thin film deposition and surface coating. It utilizes a magnetic field-enhanced electron bombardment process to sputter atoms or molecules from a solid target onto a substrate surface, forming a thin film or coating. The present invention utilizes magnetron sputtering to deposit the thin film thermocouple 2 directly onto the fuel cell plate 1, significantly improving stability. The NiCr bottom electrode thin film and NiSi top electrode thin film are innovative coating deposition methods, providing reliable safety protection while completing transient temperature measurement. The copper buckle is tightly coupled to the thin film thermocouple through a clever groove design, without affecting the sealing of the fuel cell stack, thereby improving the safety of the fuel cell. The temperature compensation wire passes through the small hole of the copper buckle and connects to the copper buckle, enabling regular transient temperature measurement of the fuel cell plate without affecting the sealing of the fuel cell stack. Using thin film thermocouples to measure temperature changes in fuel cells has the characteristics of fast response and high accuracy, playing an important role in protecting the safety of life and property and promoting the rapid development of the new energy industry.

[0024] The thin film thermocouples 2 are evenly distributed on the fuel cell plate 1 , covering a wide area and improving the aesthetics.

[0025] The fuel cell board 1 is used to directly convert chemical energy into electrical energy with high conversion efficiency, which is more efficient than traditional power generation methods and does not produce harmful exhaust gas. It is a clean energy source that helps reduce environmental pollution and greenhouse gas emissions.

[0026] The NiSi top electrode film 201 and the NiCr bottom electrode film 202 overlap at a position close to the center line of the thin film thermocouple 2, which is the hot junction.

[0027] The temperature compensation line 4 includes a NiSi compensation line 401 and a NiCr compensation line 402. The copper buckle 3 is provided with two groups, namely the first copper connector 301 and the second copper connector 302. The NiSi compensation line 401 is connected to the first copper connector 301, and the NiCr compensation line 402 is connected to the second copper connector 302. The first copper connector 301 and the second copper connector 302 are both straight plate structures. Small holes are opened at the tails of the first copper connector 301 and the second copper connector 302. The NiSi compensation line 401 and the NiCr compensation line 402 pass through the small holes at the tail ends of the first copper connector 301 and the second copper connector 302 respectively, thereby realizing regular transient temperature measurement of the temperature of the fuel cell plate 1 without affecting the sealing of the stack.

[0028] The NiSi top electrode film 201 and the NiCr bottom electrode film 202 consist of oblique edges and transverse edges, and the angle between the oblique edges and the transverse edges is 135 degrees. The NiSi top electrode film 201 and the NiCr bottom electrode film 202 are symmetrically arranged about the hot junction position.

[0029] In summary, the fuel cell plate in the present invention directly converts chemical energy into electrical energy with a high conversion efficiency, which is more efficient than traditional power generation methods and does not produce harmful exhaust gas. It is a clean energy source that helps reduce environmental pollution and greenhouse gas emissions. The NiCr bottom electrode film and the NiSi top electrode film are innovative coating deposition methods. While completing transient temperature measurement, they provide reliable safety protection. The copper buckle is tightly buckled with the thin film thermocouple through a clever groove design, and does not affect the sealing of the fuel cell stack, which also improves the safety of the fuel cell. The temperature compensation line passes through the small hole at the tail end of the copper buckle and connects to the copper buckle, realizing regular transient temperature measurement of the fuel cell plate without affecting the sealing of the fuel cell stack. It also overcomes the shortcomings of slow temperature measurement speed, low measurement accuracy and damage to battery sealing in previous temperature measurement processes. The thin film thermocouple 2 is directly deposited on the fuel cell plate 1 through magnetron sputtering technology, which greatly improves the stability; the design of the copper buckle 3 takes into account the requirements for sealing in the fuel cell packaging process to ensure the safe operation of the fuel cell; the use of thin film thermocouple 2 to measure the temperature change of the fuel cell has the characteristics of fast response and high accuracy, plays an important role in protecting the safety of people's lives and property, and promotes the rapid development of the new energy industry.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A micro-thin film thermocouple sensing system for transient temperature measurement of fuel cells, It is characterized in that It includes a fuel cell plate, a thin film thermocouple, a copper buckle and a temperature compensation line. A NiSi top electrode film and a NiCr bottom electrode film are arranged on the thin film thermocouple from top to bottom in sequence. The end of the copper buckle away from the fuel cell plate is connected to the temperature compensation line through a small hole. The copper buckle is closely connected to the thin film thermocouple through a groove. The thin film thermocouple is deposited on the fuel cell plate by magnetron sputtering technology. The NiSi top electrode film and the NiCr bottom electrode film are both arranged by coating deposition.

2. A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell according to claim 1, It is characterized in that The fuel cell board is used to convert chemical energy directly into electrical energy.

3. A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell according to claim 1, It is characterized in that The NiSi top electrode film and the NiCr bottom electrode film overlap at a location close to the center line of the thin film thermocouple.

4. A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell according to claim 1, It is characterized in that The thin film thermocouples are evenly distributed on the fuel cell plate.

5. A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell according to claim 1, It is characterized in that The temperature compensation wire includes a NiSi compensation wire and a NiCr compensation wire. The copper buckle is provided with two groups, namely a first copper connector and a second copper connector. The NiSi compensation wire is connected to the first copper connector, and the NiCr compensation wire is connected to the second copper connector.

6. A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell according to claim 5, It is characterized in that The first copper connector and the second copper connector are both straight plate structures, and the tails of the first copper connector and the second copper connector are both provided with the small holes, and the NiSi compensation wire and the NiCr compensation wire pass through the small holes at the tails of the first copper connector and the second copper connector respectively.

7. A micro-thin film thermocouple sensing system for transient temperature measurement of a fuel cell according to claim 1, It is characterized in that The NiSi top electrode film and the NiCr bottom electrode film consist of a bevel and a transverse edge, and the angle between the bevel and the transverse edge is 135 degrees.

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