A performance testing device suitable for metal fuel cells

Abstract

The present invention relates to a performance testing device suitable for metal fuel cells, belonging to the field of metal fuel cells, wherein the adaptive clamping device can autonomously position and clamp stacks of different sizes and shapes, and can be fixed adaptively according to the shapes, the sealing performance testing device performs a sealing performance test on the metal fuel cell through a test pool, and the discharge performance testing device performs a discharge performance test on the metal fuel cell. The present invention can simultaneously perform both sealing and discharge performance tests, and can realize the perfusion of different electrolytes and the measurement of stacks composed of battery cells of different sizes and numbers, meeting the compatibility requirements of large quantities and multiple types of batteries shipped from the factory.

Description

Technical Field

[0001] The invention relates to the field of metal fuel cells, and in particular to a performance testing device suitable for metal fuel cells. Background Art

[0002] Metal fuel cells have the advantages of low cost, non-toxicity, pollution-free, stable discharge voltage, high specific energy and high specific power, etc., and they are rich in resources and can be recycled. They are a new energy source with great development and application prospects. In recent years, with the development and improvement of some theoretical processes, metal fuel cells have been widely used in electric vehicles, defense industry, transportation equipment and other fields, and have great development potential in some emerging energy industries. However, the testing standards and equipment related to the production of metal fuel cell products have not yet fully developed into a complete ecological chain. At present, the industry lacks specific and clear standards and definitions for the core performance indicators of various metal fuel cells, such as sealing performance and discharge performance. In terms of these performance test devices, there is also a lack of a performance test instrument that can be used for inspection and testing of various metal fuel cell products before leaving the factory. The lack and insufficiency of detection indicators and test equipment have led to the lack of sufficient attractiveness of metal fuel cells in the application market, industry selection and other links, and it is difficult to achieve the competitiveness of other types of battery industries.

[0003] The existing technology has the following disadvantages:

[0004] 1. Most of the research and patents on metal fuel cells are concentrated on the theoretical design structure of the battery (such as CN202122267399.8, CN202122753280.1), the interactive technology of heat transfer and vibration transfer with the outside world (such as CN202010325788.9, CN202111141482.9), and the application of new materials (such as CN202110592807.9, CN201580066255.0). The subsequent steps of product production such as performance testing are somewhat neglected. These performance tests lack standardized indicator support, which also makes it difficult for metal fuel cells to be put on the market for production and use.

[0005] 2. In terms of performance testing of metal fuel cells, the existing technology mainly focuses on durability performance testing (such as CN202010263777.2, CN201910447903.7) and battery temperature maintenance performance testing (such as CN201810958448.2). There is a lack of clear test standards for the two core performance tests of metal fuel cells, namely sealing performance and discharge performance testing. The existing technology and current standards cannot meet the core performance testing requirements of metal fuel cells when they leave the factory.

[0006] 3. There is a lack of hardware connection between the clamping equipment used in the battery performance test and the performance test device (such as CN201811527075.X, CN01254481.7). The clamping equipment does not take into account the geometric differences between different metal fuel cells, different battery connection methods, and even different sizes and numbers of battery cells. It also does not consider the connection of electrical circuits and the external circulation of electrolyte pipelines. As a result, the clamping device will hinder the performance test of the product to a certain extent. Therefore, it is necessary to consider many aspects, comprehensively consider the three aspects of the geometric shape of the battery stack, the line and pipeline connection, and the battery testing requirements, and organically combine the clamping equipment and the performance test device to meet the needs of metal fuel cell performance testing.

[0007] 4. The connection between different testing standards for metal fuel cells has been artificially severed, which objectively causes the inconsistency of the testing process, leads to the mutual influence of internal factors between different tests of a certain metal fuel cell, and makes it difficult for the timeliness of the stack performance test to meet the requirements. Summary of the invention

[0008] The purpose of the present invention is to provide a performance testing device suitable for metal fuel cells to meet the compatibility requirements of large quantities and multiple types of batteries shipped from the factory, as well as the simultaneous implementation of sealing tests and discharge tests.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] A performance testing device suitable for a metal fuel cell, the performance testing device comprising: an adaptive clamping device, a lifting console, a test pool, a sealing performance testing device and a discharge performance testing device;

[0011] The adaptive clamping device is arranged in the test pool; the adaptive clamping device is used to autonomously position and clamp battery stacks of different sizes and shapes;

[0012] The lifting console is connected to the adaptive clamping device, and the lifting console is used to control the lifting and lowering of the adaptive clamping device and adjust the height of the adaptive clamping device to the bottom of the test pool;

[0013] The sealing performance testing device is connected to the test water pool, and the sealing performance testing device is used to perform a sealing performance test on the metal fuel cell through the test water pool;

[0014] The discharge performance testing device is connected to the metal fuel cell in the adaptive clamping device, and the discharge performance testing device is used to perform a discharge performance test on the metal fuel cell.

[0015] Optionally, the adaptive clamping device comprises: a support platform, two display panels, four clamping structures and four lifting rings;

[0016] The two display boards are in the shape of comb teeth, and the opposite sides of the support are in the shape of comb teeth that match the display boards. Each display board is retractably connected to one side of the support. When the two display boards are not unfolded, they form a complete flat plate with the support. The two display boards are unfolded to a corresponding length according to the size of the battery stack. The gaps between the comb teeth of the display boards are used to allow the electrolyte leaked from the battery stack to flow down and be collected in the test pool.

[0017] Two clamping structures are relatively arranged on two display boards, and another two clamping structures are relatively arranged on the support platform, and the connection line of the two clamping structures is perpendicular to the connection line of the other two clamping structures; the four clamping structures are used to autonomously position and clamp battery stacks of different sizes and shapes;

[0018] Four lifting rings are fixedly connected to the support platform, and control ends of the four lifting rings are connected to the lifting control console; the four lifting rings are used to drive the support platform and the battery stack to rise and fall under the control of the lifting control console, and adjust the height of the battery stack to the bottom of the test water tank.

[0019] Optionally, the clamping structure includes: a height adjustment support rod, a height locking device, a clamping support rod, a ball joint connection device and an adaptive claw plate;

[0020] One end of the height adjustment support rod is connected to the height locking device, and the other end of the height adjustment support rod is vertically connected to one end of the clamping support rod; the height locking device is fixed on the display board or the support platform; the other end of the clamping support rod is connected to the adaptive claw plate through a ball joint connection device; the adaptive claw plate can rotate 120° around the ball joint connection device;

[0021] The height adjustment support rod is used to adjust the vertical height so that the axis of the clamping support rod coincides with the axis of the battery stack and is fixed by a height locking device;

[0022] The clamping rod is used to adjust the horizontal extension and clamp the battery stack through the adaptive claw plate.

[0023] Optionally, the adaptive claw plate comprises: a three-way rod and a connecting plate;

[0024] One end of the three-way rod is connected to the same side surface of the connecting plate, and the other end of the three-way rod is connected to the ball joint connecting device.

[0025] Optionally, the performance testing device further comprises: four lifting columns;

[0026] One end of the four lifting columns is fixedly connected to the bottom of the test pool; the four lifting columns pass through the four lifting rings one by one, and the adaptive clamping device moves up and down along the lifting columns.

[0027] Optionally, the sealing performance testing equipment includes: a distilled water tank, a distilled water pipe, a water pump, an electronic mass scale and a water leakage detection instrument;

[0028] The distilled water tank is connected to the test water pool through a distilled water pipe, and a water pump is provided on the distilled water pipe; the distilled water tank is used to provide the distilled water required for the sealing performance test penetration experiment to the test water pool through the distilled water pipe and the water pump;

[0029] An electronic mass scale is arranged below the test water pool, and is used to measure the mass of the stack before and after the reaction operation during the sealing performance test leakage experiment, so as to obtain the water leakage of the stack;

[0030] The water leakage detection instrument is placed at the bottom of the test pool during the sealing performance test leakage experiment to detect whether there is any leakage in the battery stack.

[0031] Optionally, the calculation formula for the water leakage of the battery stack is:

[0032]

[0033] Where V t is the leakage of the stack per unit time, V l is time T 1 Internal leakage liquid volume, m l is time T 1 The mass of the leaked liquid in the internal operation, ρ s is the density of the leaking liquid, m 0 The initial mass of the stack is measured when it is running stably, m 1 To measure the end quality.

[0034] Optionally, the performance testing device further includes: a testing platform;

[0035] The test platform is divided into three layers, including a top layer, a middle layer and a bottom layer; the top layer is used to place an electronic mass scale; the middle layer is used to place a distilled water tank; and the bottom layer is used to place an electrolyte circulation system and ancillary equipment of a metal fuel cell.

[0036] Optionally, the discharge performance test equipment includes: electrical test equipment, a data acquisition instrument and a computer;

[0037] The positive and negative terminals of the battery stack are connected to the positive and negative terminals of the electrical testing equipment;

[0038] The signal output terminal of the electrical test equipment is connected to the signal input terminal of the data acquisition instrument, and the signal output terminal of the data acquisition instrument is connected to the computer;

[0039] The electrical testing equipment is used to collect electrical parameter data of the battery stack and transmit it to the data acquisition instrument;

[0040] The data acquisition instrument is used to form a time domain data set file of the collected electrical parameter data and transmit it to a computer;

[0041] The computer is used to analyze and calculate the electrical parameter data in the time domain data set file to complete the discharge performance test.

[0042] Optional, the test indicators for discharge performance evaluation include: average stable operating power W e Difference with maximum power W Δ ;

[0043] The average stable operating power W e The calculation formula is: Where W t is the real-time power of the battery stack, T 2 The duration of the test for stable operation of the fuel cell stack;

[0044] The maximum power difference W Δ The calculation formula is: Δ =|W e -(W t ) max |; In the formula, (W t ) max It is the maximum value of the real-time power of the fuel cell stack.

[0045] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0046] The present invention discloses a performance test device suitable for metal fuel cells. The adaptive clamping device can autonomously position and clamp stacks of different sizes and shapes, and can be fixed adaptively according to the shape. The sealing performance test device performs a sealing performance test on the metal fuel cell through a test pool, and the discharge performance test device performs a discharge performance test on the metal fuel cell. The present invention can perform both sealing and discharge performance tests at the same time, and can realize the perfusion of different electrolytes and the measurement of stacks composed of battery cells of different sizes and numbers, meeting the compatibility requirements of large quantities and multiple types of batteries shipped from the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 A schematic diagram of a performance testing device for a metal fuel cell provided in an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of the structure of an adaptive clamping device provided by an embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the structure of a lifting control console provided by an embodiment of the present invention;

[0051] Figure 4 This is a wiring diagram of a discharge performance test device provided in an embodiment of the present invention.

[0052] Explanation of symbols: 1 lifting console, 2 lifting column, 3 adaptive clamping device, 3-1 support table, 3-2 display board, 3-3 height adjustment support rod, 3-4 height locking device, 3-5 clamping support rod, 3-6 ball joint connection device, 3-7 lifting ring, 3-8 adaptive claw plate, 4 test water pool, 5 electronic mass scale, 6 distilled water pipe, 7 water pump, 8 test platform, 9 distilled water tank, 10 electrical test equipment, 11 data acquisition instrument, 12 computer, 13 battery stack. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] The purpose of the present invention is to provide a performance testing device suitable for metal fuel cells to meet the compatibility requirements of large quantities and multiple types of batteries shipped from the factory, as well as the simultaneous implementation of sealing tests and discharge tests.

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] Metal fuel cells, also known as metal-air batteries, are a special type of fuel cell that uses metal as fuel and undergoes a redox reaction with oxygen in the air to generate electricity. The metal fuel cell structure consists of a metal anode, an electrolyte, and an air cathode. It uses active solid metals with a relatively negative electrode potential (such as aluminum, zinc, lithium, magnesium, etc.) as the fuel source, an alkaline solution or a neutral salt solution as the electrolyte, and oxygen in the air as the cathode. It has the advantages of low cost, non-toxicity, no pollution, stable discharge voltage, high specific energy and high specific power.

[0057] Sealing performance and discharge performance are two important core performance indicators of metal fuel cells. Sealing performance is to ensure that qualified battery products meet certain leakage standards: first, the electrolyte solution must not leak out of the battery, and second, no water must leak into the battery. The sealing performance test is a standard test for testing the sealing of metal fuel cells. Discharge performance is an indicator of the battery's internal resistance, open circuit voltage, discharge power and other electrical parameters when the battery is discharged under stable working conditions, as well as the temperature change during the discharge process. The discharge performance test is a standard test for testing the discharge performance of metal fuel cells.

[0058] The present invention innovatively combines the two core performance index tests of metal fuel cells, namely, sealing performance and discharge performance, and designs a performance test device suitable for metal fuel cells. In combination with the device, clear performance test indicators are defined for factory inspection of metal fuel cells. Figure 1 As shown, a performance test device for a metal fuel cell provided by an embodiment of the present invention includes: an adaptive clamping device 3, a lifting console 1, a test pool 4, a sealing performance test device and a discharge performance test device. The adaptive clamping device 3 is arranged in the test pool 4, and the adaptive clamping device 3 is used to autonomously position and clamp the battery stack 13 of different sizes and shapes, and can be fixed adaptively according to the shape. The lifting console 1 is connected to the adaptive clamping device 3, and the lifting console 1 is used to control the lifting and lowering of the adaptive clamping device 3, and adjust the height of the adaptive clamping device 3 to the bottom of the test pool 4. The sealing performance test device is connected to the test pool 4, and the sealing performance test device is used to perform a sealing performance test on the metal fuel cell through the test pool 4. The discharge performance test device is connected to the metal fuel cell in the adaptive clamping device 3, and the discharge performance test device is used to perform a discharge performance test on the metal fuel cell. Among them, the battery stack 13 is a plurality of battery components composed of multiple metal fuel cell monomers connected by a series or parallel electrical structure, and there are channels between the monomers for exchanging electrolytes. The electrolyte is a certain corrosive medium used in chemical batteries, which provides ions for the normal operation of the metal fuel cell.

[0059] The performance testing device can adaptively clamp various metal fuel cells and stacks 13, and perform both sealing and discharge performance tests simultaneously. It can realize the injection of different electrolytes and the measurement of battery cells of different sizes and numbers. It is suitable for all current metal fuel cell manufacturers to inspect and test batteries before leaving the factory.

[0060] The specific structure of the performance testing device is further described in detail below in conjunction with the accompanying drawings.

[0061] Reference Figure 2The adaptive clamping device 3 includes: a support platform 3-1, two display panels 3-2, four clamping structures and four lifting rings 3-7. The two display panels 3-2 are in the shape of comb teeth, and the opposite sides of the support platform 3-1 are in the shape of comb teeth that match the display panels 3-2. Each display panel 3-2 is telescopically connected to one side of the support platform 3-1; when the two display panels 3-2 are not unfolded, they form a complete flat plate with the support platform 3-1; the two display panels 3-2 are unfolded to a corresponding length according to the size of the battery stack 13, and the gaps between the comb teeth of the display panels 3-2 are used to allow the electrolyte leaked from the battery stack 13 to flow down and be collected in the test pool 4. Two clamping structures are relatively arranged on the two display panels 3-2, and the other two clamping structures are relatively arranged on the support platform 3-1. The connection line of the two clamping structures is perpendicular to the connection line of the other two clamping structures; the four clamping structures are used to autonomously position and clamp battery stacks 13 of different sizes and shapes. The four lifting rings 3-7 are fixedly connected to the support platform 3-1, and the control ends of the four lifting rings 3-7 are connected to the lifting control console 1; the four lifting rings 3-7 are used to drive the support platform 3-1 and the battery stack 13 to rise and fall under the control of the lifting control console 1, and adjust the height of the battery stack 13 to the bottom of the test water pool 4.

[0062] The clamping structure includes: a height adjustment support rod 3-3, a height locking device 3-4, a clamping support rod 3-5, a ball joint connection device 3-6 and an adaptive claw plate 3-8. One end of the height adjustment support rod 3-3 is connected to the height locking device 3-4, and the other end of the height adjustment support rod 3-3 is vertically connected to one end of the clamping support rod 3-5; the height locking device 3-4 is fixed on the display board 3-2 or the support platform 3-1; the other end of the clamping support rod 3-5 is connected to the adaptive claw plate 3-8 through the ball joint connection device 3-6; the adaptive claw plate 3-8 can rotate 120° around the ball joint connection device 3-6. The height adjustment support rod 3-3 is used to adjust the vertical height so that the axis of the clamping support rod 3-5 coincides with the axis of the battery stack 13 and is fixed by the height locking device 3-4. The clamping support rod 3-5 is used to adjust the horizontal extension and clamps the battery stack 13 through the adaptive claw plate 3-8.

[0063] The self-adaptive claw plate 3-8 comprises a three-way rod and a connecting plate, one end of the three-way rod is connected to the same side of the connecting plate, and the other end of the three-way rod is connected to the ball joint connecting device 3-6.

[0064] The performance test device further includes: four lifting columns 2. One end of the four lifting columns 2 is fixedly connected to the bottom of the test pool 4; the four lifting columns 2 pass through four lifting rings 3-7 one by one, and the adaptive clamping device 3 moves up and down along the lifting columns 2.

[0065] As a preferred method, the clamping support rod 3-5 is connected to a hydraulic control system, which can control the extension of the clamping support rod 3-5 and provide a certain clamping force to prevent it from falling. The entire adaptive clamping device 3 fixes the horizontal position and vertical translation through the lifting rings 3-7 at the four corners of the support platform 3-1, so as to realize automatic lifting of the platform.

[0066] The specific working principle of the adaptive clamping device 3 is: first, according to the axial size of the battery stack 13, roughly determine the radial size of the installation, that is, the total length of the support 3-1 and the two display panels 3-2, determine the extension of the display panel 3-2 and fix the position, adjust the height adjustment support rod 3-3, so that the axis of the clamping support rod 3-5 coincides with the axis of the battery stack 13 and is fixed by the height locking device 3-4. The hydraulic system controls the extension of the clamping support rod 3-5 in four directions to clamp the battery stack 13, and provides sufficient clamping force to the clamp. If interference occurs at the water inlet and outlet on both sides, the height adjustment support rod 3-3 can be adjusted for secondary positioning. When doing a sealing performance test, the entire battery stack 13 needs to be submerged below the liquid surface, and the lifting ring 3-7 drives the entire adaptive clamping device 3 and the battery stack 13 to descend vertically to the bottom of the test water pool 4 under the control of the lifting console 1.

[0067] The adaptive clamping device 3 is assembled and matched with the lifting console 1 as shown in Figure 3 As shown, Figure 3 In the embodiment, the lifting column 2 is welded to the bottom of the test pool 4, and can drive the adaptive clamping device 3 to move up and down. When the battery stack 13 is installed, the lifting console 1 controls the adaptive clamping device 3 to fall to the bottom of the test pool 4, and the discharge performance test is performed after the battery stack 13 is installed. When performing a sealing performance test leakage experiment, the adaptive clamping device 3 and the battery stack 13 to be tested need to be lifted, and a water leakage detection instrument (water leakage detection test paper) is placed at the bottom to detect whether there is a leakage phenomenon; when performing a penetration experiment, the clamping device and the battery stack 13 (the battery stack to be tested) are dropped to the bottom, and the test pool 4 begins to fill with water until the liquid level covers the top of the battery stack 13 shell. Test paper: The test paper for the sealing test uses litmus paper. The electrolyte of the metal fuel cell contains alkaline substances after the reaction. For example, the reaction product of the magnesium fuel cell is magnesium hydroxide, which is alkaline. The red litmus paper will turn blue when it encounters alkaline substances. Therefore, it is possible to observe whether the litmus paper changes color to detect whether there is electrolyte leakage in the battery stack 13.

[0068] Exemplarily, the sealing performance test equipment includes: a distilled water tank 9, a distilled water pipe 6, a water pump 7, an electronic mass scale 5 and a water leakage detection instrument. Figure 1As shown, the distilled water tank 9 is connected to the test water pool 4 through the distilled water pipe 6, and a water pump 7 is provided on the distilled water pipe 6. The distilled water tank 9 is used to provide the distilled water required for the sealing performance test penetration experiment to the test water pool 4 through the distilled water pipe 6 and the water pump 7. The electronic mass scale 5 is arranged below the test water pool 4, and the electronic mass scale 5 is used to measure the mass of the battery stack 13 before and after the reaction operation during the sealing performance test leakage experiment, so as to obtain the water leakage of the battery stack 13. The water leakage detection instrument is placed at the bottom of the test water pool 4 during the sealing performance test leakage experiment to detect whether there is leakage in the battery stack 13.

[0069] Calculation of leakage water:

[0070] Assume that the stack to be tested starts measuring the initial mass m when it is running stably. 0 , record a certain time T 1 After the value of the electrical parameter changes, the measurement ends with the mass m 1 , then the mass of the liquid leaked during the period of operation of the tested stack is m l for

[0071] m l =m 0 -m 1

[0072] The evaporation volume of the leaked liquid is small, so it is ignored in the calculation. Start calculating the volume of the leaked liquid V l for

[0073]

[0074] Calculate the stack leakage per unit time V t :

[0075]

[0076] The stack leakage per unit time V t Substitute it into the evaluation system as a test indicator.

[0077] The calculation formula for the water leakage of the battery stack is:

[0078]

[0079] The performance test device also includes: a test platform 8. The test platform 8 is divided into three layers, including a top layer, a middle layer and a bottom layer. The top layer is used to place an electronic mass scale 5; the middle layer is used to place a distilled water tank 9. The bottom layer is used to place the electrolyte circulation system and auxiliary equipment of the metal fuel cell.

[0080] Depend on Figure 1It can be seen that the test platform 8 is divided into three layers. The top layer is equipped with the main equipment for the discharge performance test and the sealing performance test. The lifting console 1 controls the adaptive clamping device 3 and the stack 13 to be tested to move up and down along the lifting column 2 to meet the needs of different tests. The stack 13 to be tested is installed in the adaptive clamping device 3, and the anode and cathode terminals are connected to the electrical test equipment 10. The values ​​of various electrical indicators can be observed in real time, and the measured values ​​are used in the evaluation of the discharge performance test. The test pool 4 is used to check the gas tightness of the stack 13 shell in the sealing performance test penetration experiment. The electronic mass scale 5 measures the overall mass of the clamping device, and the water leakage of the stack 13 equipment is calculated based on the mass change before and after the reaction operation, with an accuracy of grams. The measured values ​​are used in the leakage experiment evaluation. The second layer is placed with a distilled water tank 9, which provides the distilled water required for the sealing performance test penetration experiment as an auxiliary medium. It is connected to the test pool 4 through a distilled water pipe 6, and a water pump 7 provides power for the delivery of distilled water. The bottom layer of the test platform 8 is used to place the electrolyte circulation system of the metal fuel cell and other possible auxiliary equipment.

[0081] In one example, referring to Figure 4 , the discharge performance test equipment includes: an electrical test equipment 10, a data acquisition instrument 11 and a computer 12. The cathode and anode terminals of the battery stack 13 are connected to the positive and negative electrodes of the electrical test equipment 10. The signal output end of the electrical test equipment 10 is connected to the signal input end of the data acquisition instrument 11, and the signal output end of the data acquisition instrument 11 is connected to the computer 12. The electrical test equipment 10 is used to collect electrical parameter data of the battery stack 13 and transmit it to the data acquisition instrument 11. The data acquisition instrument 11 is used to form a time domain data set file with the collected electrical parameter data and transmit it to the computer 12. The computer 12 is used to analyze and calculate the electrical parameter data in the time domain data set file to complete the discharge performance test.

[0082] Discharge performance index calculation

[0083] Assume the recorded real-time power of the battery stack is W t , record the stable operation test time of the battery stack as T 2 , then the average stable operating power W e

[0084]

[0085] Calculate the maximum power difference W Δ

[0086] W Δ =|W e -(W t ) max |

[0087] Maximum power difference W Δ The average stable operating power We As a test indicator for evaluating discharge performance.

[0088] The present invention takes into account the two core performance tests of metal fuel cells and the improvement and innovation of the test clamping equipment, and designs a performance test device suitable for metal fuel cells, specifically a device suitable for the sealing performance and discharge performance test of metal fuel cells. With the test indicators of the two performances, the test device realizes the compatibility requirements of large quantities and multiple types of batteries shipped from the factory. The sealing test and the discharge test are carried out simultaneously, which can eliminate the incoherence of the battery test to the greatest extent and meet the timeliness and accuracy of the battery test. The present invention can realize the perfusion of different electrolytes and the measurement of metal fuel cell monomers of different sizes and quantities, and is suitable for all current metal fuel cell manufacturers to inspect and test batteries before they leave the factory.

[0089] The present invention promotes the standardization and regularization of factory inspection of metal fuel cells, which can promote the all-round and multi-angle development of the metal fuel cell industry, allowing metal fuel cells to give full play to their huge market application prospects and development potential, and be more widely used in various new energy industry chains.

[0090] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A performance testing device suitable for metal fuel cells, characterized in that: The performance testing device comprises: an adaptive clamping device, a lifting console, a test pool, a sealing performance testing device and a discharge performance testing device; The adaptive clamping device is arranged in the test pool; the adaptive clamping device is used to autonomously position and clamp battery stacks of different sizes and shapes; The lifting console is connected to the adaptive clamping device, and the lifting console is used to control the lifting and lowering of the adaptive clamping device and adjust the height of the adaptive clamping device to the bottom of the test pool; The sealing performance testing device is connected to the test water pool, and the sealing performance testing device is used to perform a sealing performance test on the metal fuel cell through the test water pool; The discharge performance testing device is connected to the metal fuel cell in the adaptive clamping device, and the discharge performance testing device is used to perform a discharge performance test on the metal fuel cell; The adaptive clamping device comprises: a support platform, two display panels, four clamping structures and four lifting rings; The two display boards are in the shape of comb teeth, and the two opposite sides of the support are in the shape of comb teeth that match the display boards. Each display board is retractably connected to one side of the support. When the two display boards are not unfolded, they form a complete flat plate with the support. The two display boards are unfolded to a corresponding length according to the size of the battery stack. The gaps between the comb teeth of the display boards are used to allow the electrolyte leaked from the battery stack to flow down and be collected in the test pool. Two clamping structures are relatively arranged on two display boards, and another two clamping structures are relatively arranged on the support platform, and the connection line of the two clamping structures is perpendicular to the connection line of the other two clamping structures; the four clamping structures are used to autonomously position and clamp battery stacks of different sizes and shapes; Four lifting rings are fixedly connected to the support platform, and the control ends of the four lifting rings are connected to the lifting control console; the four lifting rings are used to drive the support platform and the battery stack to move up and down under the control of the lifting control console, and adjust the height of the battery stack to the bottom of the test pool; The clamping structure comprises: a height adjustment support rod, a height locking device, a clamping support rod, a ball joint connection device and an adaptive claw plate; One end of the height adjustment support rod is connected to the height locking device, and the other end of the height adjustment support rod is vertically connected to one end of the clamping support rod; the height locking device is fixed on the display board or the support platform; the other end of the clamping support rod is connected to the adaptive claw plate through a ball joint connection device; the adaptive claw plate can rotate 120° around the ball joint connection device; The height adjustment support rod is used to adjust the vertical height so that the axis of the clamping support rod coincides with the axis of the battery stack and is fixed by a height locking device; The clamping support rod is used to adjust the horizontal extension and clamp the battery stack through the adaptive claw plate; The adaptive claw plate comprises: a three-way rod and a connecting plate; One end of the three-way rod is connected to the same side of the connecting plate, and the other end of the three-way rod is connected to the ball joint connection device; The performance testing device also includes: four lifting columns; One end of the four lifting columns is fixedly connected to the bottom of the test pool; the four lifting columns pass through the four lifting rings one by one, and the adaptive clamping device moves up and down along the lifting columns.

2. The performance testing device for metal fuel cells according to claim 1, characterized in that: The sealing performance testing equipment includes: a distilled water tank, a distilled water pipe, a water pump, an electronic mass scale and a water leakage detection instrument; The distilled water tank is connected to the test water pool through a distilled water pipe, and a water pump is provided on the distilled water pipe; the distilled water tank is used to provide the distilled water required for the sealing performance test penetration experiment to the test water pool through the distilled water pipe and the water pump; An electronic mass scale is arranged below the test water pool, and is used to measure the mass of the stack before and after the reaction operation during the sealing performance test leakage experiment, so as to obtain the water leakage of the stack; The water leakage detection instrument is used for sealing performance testing and is placed at the bottom of the test pool during leakage experiments to detect whether there is any leakage in the battery stack.

3. The performance testing device for metal fuel cells according to claim 2, characterized in that: The calculation formula of the stack water leakage is: Where V t is the stack leakage per unit time, V l is the volume of leaked liquid within time T1, m l is the mass of the leaked liquid during the operation in time T1, ρ s is the density of the leaking liquid, m0 is the initial mass measured when the stack is in stable operation, and m1 is the final mass of the measurement.

4. The performance testing device for metal fuel cells according to claim 2, characterized in that: The performance testing device also includes: a testing platform; The test platform is divided into three layers, including a top layer, a middle layer and a bottom layer; the top layer is used to place an electronic mass scale; the middle layer is used to place a distilled water tank; and the bottom layer is used to place an electrolyte circulation system and ancillary equipment of a metal fuel cell.

5. The performance testing device for metal fuel cells according to claim 1, characterized in that: The discharge performance test equipment includes: electrical test equipment, a data acquisition instrument and a computer; The positive and negative terminals of the battery stack are connected to the positive and negative terminals of the electrical testing equipment; The signal output terminal of the electrical test equipment is connected to the signal input terminal of the data acquisition instrument, and the signal output terminal of the data acquisition instrument is connected to the computer; The electrical testing equipment is used to collect electrical parameter data of the battery stack and transmit it to the data acquisition instrument; The data acquisition instrument is used to form a time domain data set file of the collected electrical parameter data and transmit it to a computer; The computer is used to analyze and calculate the electrical parameter data in the time domain data set file to complete the discharge performance test.

6. The performance testing device for metal fuel cells according to claim 5, characterized in that: The test indicators for discharge performance evaluation include: average stable operating power W e Difference with maximum power W Δ ; The average stable operating power W e The calculation formula is: Where W t is the real-time power of the stack, and T2 is the stable operation test duration of the stack; The maximum power difference W Δ The calculation formula is: Δ =|W e -(W t ) max |; In the formula, (W t ) max It is the maximum value of the real-time power of the fuel cell stack.

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