A multi-functional snap-in metal battery testing system

Abstract

This utility model relates to the field of metal-air battery technology and discloses a multifunctional button-type metal battery testing system. The system includes: a test bracket, a battery cylinder, a constant temperature chamber, and a test unit. A test gas path connects to a gas cylinder, an inlet valve, an outlet valve, and a vacuum pump. A pressure gauge monitors the test gas path. One end of an equal-diameter tee connector is connected to the test gas path, and the other end is connected to an equal-diameter right-angle two-way connector. The battery cylinder includes an integrated vent pipe, an atmosphere chamber, and a base. The integrated vent pipe connects to the end of the equal-diameter right-angle two-way connector furthest from the equal-diameter tee connector. The integrated vent pipe connects to the atmosphere chamber, which in turn connects to the base. The base has several electrode interfaces. This utility model, through the design of the test unit and control module, ensures the stability of the testing environment and guarantees the reliability of the test results.

Description

Technical Field

[0001] This utility model relates to the field of metal-air battery technology, and more specifically, to a multifunctional button metal battery testing system. Background Technology

[0002] In recent years, metal-air batteries have been considered a candidate for next-generation energy storage technology due to their low cost and environmental friendliness, attracting widespread attention from researchers in related fields both domestically and internationally. A metal-air battery is an electrochemical energy storage battery that uses a metal as the negative electrode and gaseous components such as oxygen, carbon dioxide, or nitrogen from the air as the positive electrode active material. It generates electrical energy through the redox reaction between the metal and the gaseous components, utilizing a specific gaseous component from the air as the positive electrode active material, thereby increasing the battery's energy density.

[0003] However, current high-energy-density metal-air batteries such as lithium-oxygen, lithium-carbon dioxide, and lithium-nitrogen are still in the research stage, and testing their performance is crucial for advancing these new metal-air batteries. Chinese Patent Publication No. CN103293482B discloses a simple button-type lithium-air battery testing device, including: a test bottle, a button-type battery base, a positive electrode lead, a negative electrode lead, an airtight plug, an inlet pipe, and an outlet pipe. The button-type battery base is placed inside the test bottle, the airtight plug is connected to the bottle opening, the positive and negative electrode leads pass through the airtight plug and connect to the button-type battery base, and one end of the inlet pipe and one end of the outlet pipe pass through the airtight plug and are placed inside the test bottle. Therefore, a single test mold cannot guarantee a constant temperature and pressure testing environment, and the test mold's temperature and pressure resistance is not clearly defined, resulting in poor test repeatability.

[0004] Therefore, it is necessary to design a multifunctional button cell metal battery testing system to solve the problems existing in the current technology. Utility Model Content

[0005] In view of this, this utility model proposes a multifunctional button metal battery testing system, which aims to solve the problem that a single test mold cannot guarantee a constant temperature and constant pressure testing environment and has poor test repeatability.

[0006] In one aspect, this utility model proposes a multifunctional button metal battery testing system, comprising:

[0007] Test bracket, battery box, temperature control chamber, test unit and control module;

[0008] The test bracket is installed inside the constant temperature chamber, the battery tube is suspended by the test bracket, the test unit is installed on the test bracket, the control module is connected to the test unit, the battery tube and the constant temperature chamber, and the control module is used to control the working status of the test unit, the battery tube and the constant temperature chamber;

[0009] The test unit includes a test gas circuit, a gas cylinder, an inlet valve, an outlet valve, a pressure gauge, a vacuum pump, an equal diameter tee connector, and an equal diameter right angle two-way connector.

[0010] The test gas circuit is connected to the gas cylinder, the inlet valve, the outlet valve, and the vacuum pump;

[0011] The pressure gauge is installed in the test gas path and is used to monitor the test gas path. One end of the equal diameter tee is connected to the test gas path, and the other end of the equal diameter tee is connected to the equal diameter right angle two-way connector.

[0012] The battery tube includes an integrated vent pipe, an atmosphere chamber, and a base;

[0013] The integrated vent pipe is connected to the end of the equal diameter right-angle two-way connector away from the equal diameter three-way connector. The integrated vent pipe is connected to the atmosphere chamber, the atmosphere chamber is connected to the base, and the base is provided with several electrode interfaces.

[0014] Furthermore, the aforementioned multifunctional button metal battery testing system also includes:

[0015] The air chamber is provided with an external thread, and the base is provided with an internal thread, and the external thread and the internal thread mesh.

[0016] The base is provided with a washer groove, and a washer is provided in the washer groove;

[0017] The base is provided with a plurality of battery holders, and the positive and negative terminals of each battery holder pass through an electrode interface, and each battery holder is used to install the battery to be tested.

[0018] Furthermore, the test support includes: a support body;

[0019] The support column is composed of several solid steel bars and several steel pipes;

[0020] Each of the solid steel bars is parallel to the ground, and each of the steel pipes is perpendicular to the ground.

[0021] Furthermore, the control module includes:

[0022] The first control unit is configured to execute a pumping command, close the inlet valve, and open the vacuum pump, outlet valve, and integrated ventilation pipe, collect first pressure data in the test gas path, and determine whether to issue a valve command based on the relationship between the first pressure data and the first target pressure data.

[0023] The second control unit is configured to acquire the valve command, close the outlet valve and the vacuum pump, open the inlet valve, and issue a data acquisition command.

[0024] The gas judgment unit is configured to acquire the acquisition command, acquire the second pressure data in the test gas path, and determine whether to close the integrated ventilation tube based on the relationship between the second pressure data and the second target pressure data.

[0025] The third control unit is configured to close the air inlet valve when it is determined that the integrated vent pipe is closed, collect the gas content of the atmosphere chamber, determine whether to repeat the evacuation command based on the gas content, and perform electrochemical performance testing on the battery under test based on the determination result.

[0026] Furthermore, when determining whether to issue a valve command based on the relationship between the first pressure data and the first target pressure data, the process includes:

[0027] When the first pressure data is greater than the first target pressure data, it is determined that the valve command will not be issued, and the first pumping speed of the vacuum pump at the current moment and the second pumping speed of the vacuum pump at the previous moment are obtained. Based on the first pumping speed and the second pumping speed, it is determined whether to adjust the power of the vacuum pump.

[0028] When the first pressure data is less than or equal to the first target pressure data, it is determined that the valve command is issued.

[0029] Furthermore, when determining whether to adjust the power of the vacuum pump based on the first pumping rate and the second pumping rate, the following steps are included:

[0030] When the first pumping speed is greater than or equal to the second pumping speed, it is determined that the power of the vacuum pump will not be adjusted, and pumping will continue at the current power.

[0031] When the first pumping speed is less than the second pumping speed, it is determined that the power of the vacuum pump should be adjusted, and the pumping speed difference between the second pumping speed and the first pumping speed is determined.

[0032] A power adjustment factor is determined based on the difference in pumping rates. The power of the vacuum pump is adjusted according to the power adjustment factor, and pumping continues based on the adjusted power.

[0033] Furthermore, when determining whether to close the integrated ventilation tube based on the relationship between the second pressure data and the second target pressure data, the process includes:

[0034] When the second pressure data is greater than or equal to the second target pressure data, it is determined that the integrated ventilator is closed.

[0035] When the second pressure data is less than the second target pressure data, it is determined that the integrated vent pipe should not be closed, and the first air intake rate of the gas cylinder at the current moment and the second air intake rate of the gas cylinder at the previous moment are obtained. Based on the first air intake rate and the second air intake rate, it is determined whether to adjust the opening of the air intake valve.

[0036] Furthermore, when determining whether to adjust the opening of the intake valve based on the first intake rate and the second intake rate, the method includes:

[0037] When the first intake rate is greater than or equal to the second intake rate, it is determined that the opening of the intake valve will not be adjusted, and intake will continue at the current opening of the intake valve.

[0038] When the first intake rate is less than the second intake rate, it is determined that the opening of the intake valve should be adjusted, and the intake rate difference between the second intake rate and the first intake rate is determined.

[0039] The target valve opening is determined based on the air intake rate difference, and air intake continues according to the target valve opening.

[0040] Furthermore, when determining whether to repeat the evacuation command based on the gas content, the process includes:

[0041] When the gas content is zero, it is determined that the gas extraction command will not be executed again, and the electrochemical performance test of the battery under test will be performed.

[0042] If the gas content is not zero, it is determined that the gas extraction command will be executed repeatedly.

[0043] Compared with existing technologies, the advantages of this invention are as follows: The constant temperature chamber can precisely control the temperature, avoiding the problem that a single test mold cannot guarantee constant temperature. The stable temperature environment allows the oxidation-reduction reaction of the metal-air battery to proceed under repeatable temperature conditions, avoiding changes in battery reaction kinetics and thermodynamic properties due to temperature variations, making each test comparable and thus improving test repeatability. The synergistic effect of the test unit's test gas path, gas cylinder, inlet valve, outlet valve, pressure gauge, vacuum pump, equal diameter tee connector, and equal diameter right-angle two-way connector enables vacuuming, pressure monitoring, and control of the test gas path, ensuring the stability of the gas pressure introduced into the battery cylinder. This allows the constant pressure environment to accurately reflect the battery's performance itself, rather than interference from gas pressure, improving test reliability. By using different gas sources in the gas cylinder, the testing needs of various metal-air batteries can be met, reducing the impact of external interference factors on battery performance testing and ensuring the stability of test results.

[0044] On the other hand, this application also provides a multifunctional button metal battery testing method, applied to the aforementioned multifunctional button metal battery testing system, comprising:

[0045] Close the inlet valve and open the vacuum pump, outlet valve and integrated ventilation pipe. Collect the first pressure data in the test gas path. Based on the relationship between the first pressure data and the first target pressure data, determine whether to close the outlet valve and vacuum pump.

[0046] When the outlet valve and vacuum pump are closed, the inlet valve is opened;

[0047] Collect the second pressure data in the test gas path, and determine whether to close the integrated ventilation tube based on the relationship between the second pressure data and the second target pressure data;

[0048] When it is determined that the integrated vent pipe is closed, the air inlet valve is closed, and the gas content in the atmosphere chamber is collected. Based on the gas content, it is determined whether to close the air inlet valve again. Based on the determination result, the electrochemical performance of the battery under test is tested.

[0049] It is understandable that the aforementioned multifunctional button metal battery testing system has the same beneficial effects, and will not be elaborated further here. Attached Figure Description

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0051] Figure 1 A schematic diagram of a multifunctional button metal battery testing system provided in this embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the structure of the test bracket provided in an embodiment of the present utility model;

[0053] Figure 3 This is a schematic diagram of the structure of the battery tube provided in an embodiment of the present utility model;

[0054] Figure 4 A cross-sectional schematic diagram of the battery pack provided in an embodiment of this utility model;

[0055] Figure 5 A schematic diagram of the structure of the base provided in an embodiment of this utility model;

[0056] Figure 6 This is a schematic diagram of the structure of the base for mounting the battery holder provided in an embodiment of the present utility model;

[0057] Figure 7 A flowchart illustrating a multifunctional button metal battery testing method provided in this embodiment of the present invention.

[0058] In the diagram, 1. Test bracket; 101. Support body; 102. Solid steel rod; 103. Steel pipe; 2. Test gas path; 3. Battery cylinder; 301. Integrated vent pipe; 302. Atmosphere chamber; 303. Base; 304. Electrode interface; 305. External thread; 306. Internal thread; 307. Washer groove; 309. Battery holder; 310. Washer; 4. Gas cylinder; 5. Inlet valve; 6. Pressure gauge; 7. Outlet valve; 8. Vacuum pump; 9. Equal diameter tee connector; 10. Equal diameter right angle two-way connector; 11. Constant temperature chamber. Detailed Implementation

[0059] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0060] In some embodiments of this application, see Figure 1-3 As shown, a multifunctional button metal battery testing system includes: a test bracket 1, a battery cylinder 3, a constant temperature chamber 11, a test unit, and a control module. The test bracket 1 is installed inside the constant temperature chamber 11, and the battery cylinder 3 is suspended from the test bracket 1. The test unit is installed on the test bracket 1. The control module is connected to the test unit, the battery cylinder 3, and the constant temperature chamber 11. The control module is used to control the working status of the test unit, the battery cylinder 3, and the constant temperature chamber 11. The test unit includes a test gas path 2, a gas cylinder 4, an inlet valve 5, an outlet valve 7, a pressure gauge 6, a vacuum pump 8, an equal diameter tee connector 9, and an equal diameter right-angle two-way connector 10. The test gas path 2 is connected to... The test gas path 2 is connected to a gas cylinder 4, an inlet valve 5, an outlet valve 7, and a vacuum pump 8. A pressure gauge 6 is installed in the test gas path 2 to monitor the test gas path 2. One end of the equal diameter tee connector 9 is connected to the test gas path 2, and the other end of the equal diameter tee connector 9 is connected to the equal diameter right angle two-way connector 10. The battery tube 3 includes an integrated vent pipe 301, an atmosphere chamber 302, and a base 303. The integrated vent pipe 301 is connected to the end of the equal diameter right angle two-way connector 10 away from the equal diameter tee connector 9. The integrated vent pipe 301 is connected to the atmosphere chamber 302, and the atmosphere chamber 302 is connected to the base 303. The base 303 is provided with several electrode interfaces 304.

[0061] Specifically, the system comprises a test bracket 1, battery cylinders 3, a constant temperature chamber 11, a test unit, and a control module, forming an organic whole. The control module, acting as the "central nervous system," coordinates the working states of the test unit, battery cylinders 3, and constant temperature chamber 11. This embodiment does not specifically address the parameters of the constant temperature chamber 11; it only requires that the test bracket 1 be installed inside the chamber, ensuring that the test unit is mounted on it. The test bracket 1 provides suspension support for the battery cylinders 3. The number of battery cylinders 3 suspended can be set according to the number of batteries (metal-air batteries) to be tested. The test bracket 1 ensures that the battery cylinders 3 are in a stable testing position within the constant temperature chamber 11, guaranteeing a consistent testing environment. The constant temperature chamber 11 creates a stable temperature environment, meeting the requirements of metal-air batteries for different temperature testing conditions. Through precise control of the control module, a temperature-controllable basic environment is provided for battery performance testing, avoiding interference from temperature fluctuations on battery reactions. The test gas path 2 of the test unit connects to gas cylinder 4, inlet valve 5, outlet valve 7, and vacuum pump 8. Gas cylinder 4 introduces gas into test gas path 2 through inlet valve 5, and vacuum pump 8 evacuates gas from test gas path 2 through outlet valve 7. Gas cylinder 4 is designated as a high-pressure gas cylinder, and the gas in cylinder 4 is set to oxygen, carbon dioxide, or nitrogen, depending on the type of metal-air battery. Inlet valve 5 and outlet valve 7 are used to precisely control the gas flow and discharge. Pressure gauge 6 is used to monitor the pressure within test gas path 2 in real time, ensuring that the pressure in test gas path 2 remains within the range required for battery testing and preventing abnormal pressure from affecting the battery performance test results. The equal-diameter tee connector 9 and the equal-diameter right-angle two-way connector 10 serve as connecting components, enabling the connection between the test gas path 2 and the battery cylinder 3. One end of the equal-diameter tee connector 9 connects to the test gas path 2, and the other end connects to the equal-diameter right-angle two-way connector 10. The equal-diameter right-angle two-way connector 10 then connects to the integrated vent pipe 301 of the battery cylinder 3, establishing a gas transmission channel to the battery cylinder 3. This allows the gas to smoothly enter the battery cylinder 3 and participate in relevant tests. When not in use, the equal-diameter right-angle two-way connector 10 can be disconnected from the battery cylinder 3 (the equal-diameter right-angle two-way connector 10 is not connected to the integrated vent pipe 301), and a stainless steel plug is used to seal the equal-diameter right-angle two-way connector 10 to ensure the airtightness of the gas path. The integrated vent pipe 301 is equipped with a valve that allows it to be closed and opened. The integrated vent pipe 301 of the battery cylinder 3 introduces the gas from the test gas path 2 into the atmosphere chamber 302. The atmosphere chamber 302 is the space where the metal-air battery reacts. Depending on the type of metal-air battery, the atmosphere chamber 302 is made of polyetheretherketone, polytetrafluoroethylene, or acrylonitrile-butadiene-styrene copolymer, so that the temperature range of the atmosphere chamber 302 is -40-250℃ and the pressure limit is 5MPa.The base 303 is provided with several electrode interfaces 304, preferably four, divided into two pairs. Each pair is connected to the positive and negative electrodes of the metal-air battery, so that the metal-air battery can be connected to a battery testing instrument and the battery's electrochemical performance can be tested.

[0062] Understandably, the constant temperature chamber 11 can precisely control the temperature, avoiding the problem of a single test mold being unable to guarantee a constant temperature. The stable temperature environment allows the oxidation-reduction reaction of the metal-air battery to proceed under repeatable temperature conditions, preventing changes in battery reaction kinetics and thermodynamic properties due to temperature variations. This ensures the comparability of each test, thereby improving test repeatability. For example, lithium-oxygen batteries exhibit differences in discharge products and reaction rates at different temperatures. A constant temperature environment can fix these influencing factors, thus accurately testing battery performance. The test unit's test gas path 2, gas cylinder 4, inlet valve 5, outlet valve 7, pressure gauge 6, vacuum pump 8, equal diameter tee connector 9, and equal diameter right-angle two-way connector 10 work together to achieve vacuuming, pressure monitoring, and control of the test gas path 2. This ensures the stability of the gas pressure entering the battery cylinder 3. For example, in lithium-carbon dioxide batteries, changes in gas pressure can affect the carbon dioxide reduction reaction process. A constant pressure environment allows the test results to accurately reflect the battery's performance itself, rather than the interference of gas pressure, thus improving the reliability of the test. By changing different gas sources (gas cylinder 4 provides different gases), the test requirements of various metal-air batteries can be met, ensuring the consistency of test conditions, reducing the impact of external interference factors on battery performance testing, and ensuring the stability of test results.

[0063] In some embodiments of this application, see Figure 4-6 As shown, the multifunctional button metal battery testing system also includes: an atmosphere chamber 302 with an external thread 305, a base 303 with an internal thread 306, the external thread 305 and the internal thread 306 engaging, a washer groove 307 in the base 303, a washer 310 in the washer groove 307, and several battery holders 309 in the base 303, with the positive and negative terminals of each battery holder 309 passing through an electrode interface 304, and each battery holder 309 used to install the battery to be tested.

[0064] In some embodiments of this application, the test support includes: a support body 101, the support being provided with a plurality of solid steel rods 102 and a plurality of steel pipes 103, each solid steel rod 102 being parallel to the ground and each steel pipe 103 being perpendicular to the ground.

[0065] Specifically, the atmosphere chamber 302 is provided with an external thread 305, and the base 303 is provided with an internal thread 306. The two are connected by thread engagement, allowing the atmosphere chamber 302 and the base 303 to be quickly disassembled and assembled, facilitating the replacement of the metal-air battery and the maintenance of both the atmosphere chamber 302 and the base 303. A washer 310 is provided in the washer groove 307 of the base 303 to enhance the airtightness of the connection, prevent gas leakage, and ensure the stability of the battery testing atmosphere. The base 303 is provided with several battery holders 309, preferably two. The positive and negative terminals of each battery holder 309 pass through the electrode interface 304, providing an installation position and electrical connection for the metal-air battery. Simultaneously, multiple sets of batteries can be tested, improving testing efficiency. The support body 101 is composed of several solid steel bars 102 and several steel pipes 103. Preferably, there are eight solid steel bars 102 and seven steel pipes 103. The steel pipes 103 ensure the strength and stability of the test bracket 1, while the solid steel bars 102 provide support for the suspension of the battery tube 3, thus ensuring the stability of the test system.

[0066] In some embodiments of this application, the control module includes: a first control unit configured to execute a evacuation command, close the inlet valve, and open the vacuum pump, outlet valve, and integrated vent pipe; collect first pressure data in the test gas path; and determine whether to issue a valve command based on the relationship between the first pressure data and the first target pressure data. A second control unit configured to acquire the valve command, close the outlet valve and vacuum pump, open the inlet valve, and issue a collection command. A gas judgment unit configured to acquire the collection command, collect second pressure data in the test gas path, and determine whether to close the integrated vent pipe based on the relationship between the second pressure data and the second target pressure data. A third control unit configured to close the inlet valve when it is determined that the integrated vent pipe is to be closed, collect the gas content in the atmosphere chamber, determine whether to repeat the evacuation command based on the gas content, and perform electrochemical performance testing on the battery under test based on the judgment result.

[0067] Specifically, when executing the evacuation command, the inlet valve is closed, and the vacuum pump, outlet valve, and integrated vent pipe are opened to establish an evacuation path. The first pressure data of the test gas path is collected, determined by a pressure gauge. Based on the relationship between the first pressure data and the first target pressure data, a valve command is issued to regulate the pressure state of the test gas path. Upon receiving the valve command, the outlet valve and vacuum pump are closed, and the inlet valve is opened. Gas from the gas cylinder enters the test gas path as the inlet valve opens. The second control unit issues a data acquisition command, which is received by the gas judgment unit. The second pressure data is collected using a pressure gauge and compared with the second target pressure data to determine whether the integrated vent pipe needs to be closed. When the integrated vent pipe needs to be closed, the inlet valve is closed, and the gas content in the atmosphere chamber is collected (monitoring gas purity and composition). Based on the gas content, it is determined whether to repeat the evacuation process (to expel gas from the battery pack and refill with the test atmosphere), thereby ensuring the environment of the atmosphere chamber and ensuring the reliability of the battery electrochemical performance test.

[0068] In some embodiments of this application, when determining whether to issue a valve command based on the relationship between the first pressure data and the first target pressure data, the method includes: when the first pressure data is greater than the first target pressure data, determining not to issue a valve command, and obtaining the first pumping rate of the vacuum pump at the current moment and the second pumping rate of the vacuum pump at the previous moment, determining whether to adjust the power of the vacuum pump based on the first pumping rate and the second pumping rate, and when the first pressure data is less than or equal to the first target pressure data, determining to issue a valve command.

[0069] In some embodiments of this application, when determining whether to adjust the power of the vacuum pump based on the first pumping rate and the second pumping rate, the method includes: when the first pumping rate is greater than or equal to the second pumping rate, it is determined that the power of the vacuum pump will not be adjusted, and pumping continues at the current power; when the first pumping rate is less than the second pumping rate, it is determined that the power of the vacuum pump will be adjusted, and the pumping rate difference between the second pumping rate and the first pumping rate is determined, a power adjustment factor is determined based on the pumping rate difference, the power of the vacuum pump is adjusted according to the power adjustment factor, and pumping continues according to the adjusted power.

[0070] Specifically, the first control unit sets a first pumping rate difference and a second pumping rate difference. The first pumping rate difference is greater than the second pumping rate difference. When the pumping rate difference is greater than the first pumping rate difference, a first power adjustment factor is determined as the power adjustment factor. When the pumping rate difference is less than or equal to the first pumping rate difference and greater than or equal to the second pumping rate difference, a second power adjustment factor is determined as the power adjustment factor. When the pumping rate difference is less than the second pumping rate difference, a third power adjustment factor is determined as the power adjustment factor. Wherein, 1.1 < third power adjustment factor < second power adjustment factor < first power adjustment factor ≤ 1.5.

[0071] Understandably, when the first pressure data is greater than the first target pressure data, it is determined that the pressure of the current test gas path has not reached the standard. Therefore, no valve command is issued, and evacuation needs to continue. By comparing the current first evacuation rate with the previous second evacuation rate, the stability of the vacuum pump's evacuation efficiency is assessed. When the first pressure data is less than or equal to the first target pressure data, it indicates that the preset vacuum level has been reached. At this point, a valve command is issued to stop evacuation and prepare for gas intake. When assessing the stability of the vacuum pump's evacuation efficiency, if the first evacuation rate is greater than or equal to the second evacuation rate, it means that the vacuum pump's evacuation efficiency has not decreased. The vacuum pump continues to operate at its current power to maintain stable evacuation until the pressure data of the test gas path is less than or equal to the first target pressure data. If the first evacuation rate is less than the second evacuation rate, it indicates that the vacuum pump's evacuation efficiency has decreased, and the vacuum pump's power needs to be adjusted. By determining the difference in evacuation rates and dynamically selecting a power adjustment factor to restore evacuation efficiency, the problem of decreased evacuation efficiency can be quickly addressed, reducing the interference of pressure fluctuations on subsequent gas filling and battery testing, and improving the reliability of the testing environment.

[0072] In some embodiments of this application, when determining whether to close the integrated vent pipe based on the relationship between the second pressure data and the second target pressure data, the method includes: when the second pressure data is greater than or equal to the second target pressure data, determining to close the integrated vent pipe; when the second pressure data is less than the second target pressure data, determining not to close the integrated vent pipe; and obtaining the first air intake rate of the gas cylinder at the current moment and the second air intake rate of the gas cylinder at the previous moment, and determining whether to adjust the opening of the air intake valve based on the first air intake rate and the second air intake rate.

[0073] In some embodiments of this application, when determining whether to adjust the opening of the intake valve based on the first intake rate and the second intake rate, the method includes: when the first intake rate is greater than or equal to the second intake rate, it is determined that the opening of the intake valve will not be adjusted, and intake will continue at the current intake valve opening; when the first intake rate is less than the second intake rate, it is determined that the opening of the intake valve will be adjusted, and the intake rate difference between the second intake rate and the first intake rate is determined, a target valve opening is determined based on the intake rate difference, and intake continues according to the target valve opening.

[0074] Specifically, the gas judgment unit sets a first intake rate difference and a second intake rate difference. The first intake rate difference is greater than the second intake rate difference. When the intake rate difference is greater than the first intake rate difference, the first opening is determined as the target valve opening. When the intake rate difference is less than or equal to the first intake rate difference and greater than or equal to the second intake rate difference, the second opening is determined as the target valve opening. When the intake rate difference is less than the second intake rate difference, the third opening is determined as the target valve opening. Wherein, 0.6 < third opening < second opening < first opening ≤ 0.9.

[0075] Understandably, when the second pressure data is greater than or equal to the second target pressure data, it indicates that the pressure of the test air circuit has reached the preset pressure. In this case, it is determined to close the integrated vent pipe to expel the gas in the battery and fill it with test atmosphere. However, when the second pressure data is less than the second target pressure data, it indicates that the pressure of the test air circuit has not reached the preset pressure and the air intake operation needs to continue. In this case, it is determined not to close the integrated vent pipe and to determine whether to adjust the opening of the air intake valve based on the first air intake rate and the second air intake rate. When the first intake rate is greater than or equal to the second intake rate, it indicates that the gas in the cylinder can stably enter the test gas path, causing the pressure in the test gas path to increase. In this case, it is determined that the opening of the intake valve will not be adjusted. The opening of the intake valve is set to 0.6 and the current opening is maintained to continue intake until the pressure in the test gas path can reach the preset pressure. When the first intake rate is less than the second intake rate, it indicates that the gas in the cylinder is entering the test gas path slowly. The opening of the intake valve needs to be opened appropriately. The target valve opening is dynamically determined according to the difference in intake rates, which ensures the stability and reliability of the intake, thereby effectively expelling the gas in the battery pack and filling it with the test atmosphere, improving the reliability of the test environment.

[0076] In some embodiments of this application, when determining whether to repeat the gas extraction command based on the gas content, the method includes: when the gas content is zero, determining that the gas extraction command should not be repeated and performing an electrochemical performance test on the battery to be tested; when the gas content is not zero, determining that the gas extraction command should be repeated.

[0077] Specifically, the gas content in the atmosphere chamber is collected (monitoring the purity and composition of the gas). When the gas content is zero, it indicates that the gas in the atmosphere chamber has been completely emptied and filled with the test atmosphere, allowing for electrochemical performance testing of the battery under test (metal-air battery). When the gas content is not zero, it indicates that the gas in the atmosphere chamber has not been completely emptied, requiring repeated execution of the evacuation command and subsequent procedures to completely empty the gas in the atmosphere chamber, ensuring the stability and reliability of the test.

[0078] In summary, the beneficial effects of this invention are as follows: the constant temperature chamber can precisely control the temperature, avoiding the problem that a single test mold cannot guarantee constant temperature. The stable temperature environment allows the oxidation-reduction reaction of the metal-air battery to proceed under repeatable temperature conditions, avoiding changes in battery reaction kinetics and thermodynamic properties due to temperature variations, making each test comparable and thus improving test repeatability. The synergistic effect of the test unit's test gas path, gas cylinder, inlet valve, outlet valve, pressure gauge, vacuum pump, equal-diameter tee connector, and equal-diameter right-angle two-way connector enables vacuuming, pressure monitoring, and control of the test gas path, ensuring the stability of the gas pressure entering the battery cylinder. This allows the constant pressure environment to accurately reflect the battery's performance itself, rather than interference from gas pressure, improving test reliability. By using different gas sources in the gas cylinder, the testing needs of various metal-air batteries can be met, reducing the impact of external interference factors on battery performance testing and ensuring the stability of test results.

[0079] In another preferred embodiment based on the above embodiments, see [reference] Figure 7 As shown, this embodiment provides a multifunctional button metal battery testing method, applied to the aforementioned multifunctional button metal battery testing system, including:

[0080] S100: Close the inlet valve and open the vacuum pump, outlet valve and integrated vent pipe. Collect the first pressure data in the test gas path. Based on the relationship between the first pressure data and the first target pressure data, determine whether to close the outlet valve and vacuum pump.

[0081] S200: Open the inlet valve when the outlet valve and vacuum pump are closed.

[0082] S300: Collects the second pressure data in the test gas path, and determines whether to close the integrated ventilation tube based on the relationship between the second pressure data and the second target pressure data.

[0083] S400: When it is determined that the integrated vent pipe is closed, the intake valve is closed and the gas content in the atmosphere chamber is collected. Based on the gas content, it is determined whether to close the intake valve again. Based on the determination result, the electrochemical performance of the battery under test is tested.

[0084] Specifically, taking the Li-O2 battery as an example, the atmosphere chamber of the battery casing is made of polyetheretherketone (PEEK), and the gas in the gas cylinder is oxygen. The inlet valve is closed, the vacuum pump and outlet valve are opened, and the integrated vent pipe is opened to evacuate to -0.1 MPa (monitored by a pressure gauge). Then, the outlet valve and vacuum pump are closed, and the inlet valve is opened again until the pressure reaches 1 MPa. The integrated vent pipe is then closed, and the inlet valve is closed again. This process is repeated 2-3 times to remove the gas from the battery casing and fill it with a 1 MPa test atmosphere. The temperature of the constant temperature chamber is set to 25℃, and the casing is left to stand for 2 hours. The battery holder is connected to the battery testing instrument through the electrode interface of the base to perform electrochemical performance testing on the coin cell (metal-air battery). Taking Li-CO2 batteries as an example, the atmosphere chamber of the battery cartridge is made of polytetrafluoroethylene. The gas in the gas cylinder is carbon dioxide. The inlet valve is closed, the vacuum pump and outlet valve are opened, and the integrated vent pipe is opened to pump the pressure down to -0.1 MPa (monitored by a pressure gauge). The outlet valve and vacuum pump are closed, and the inlet valve is opened again until the pressure reaches 2 MPa. The integrated vent pipe and inlet valve are then closed. This process is repeated 2-3 times to remove the gas from the battery cartridge and fill it with a 2 MPa test atmosphere. The temperature of the constant temperature chamber is set to 40℃ and left to stand for 1 hour. The battery holder is connected to the battery testing instrument through the electrode interface of the base to perform electrochemical performance testing on the button cell (metal-air battery). Taking a Li-N2 battery as an example, the atmosphere chamber of the battery casing is made of acrylonitrile-butadiene-styrene copolymer. The gas in the gas cylinder is nitrogen. The inlet valve is closed, the vacuum pump and outlet valve are opened, and then the integrated vent pipe is opened to evacuate to -0.15 MPa (monitored by a pressure gauge). The outlet valve and vacuum pump are closed, and then the inlet valve is opened again until the pressure reaches 3 MPa. The integrated vent pipe and inlet valve are then closed. This process is repeated 2-3 times to purge the gas from the battery casing and fill it with a 3 MPa test atmosphere. The temperature of the constant temperature chamber is set to 0℃, and the casing is left to stand for 3 hours. The battery holder is connected to the battery testing instrument through the electrode interface of the base to perform electrochemical performance testing on the coin cell (metal-air battery).

[0085] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0086] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A multifunctional button cell metal battery testing system, characterized in that, include: Test bracket, battery box, temperature control chamber, and test unit; The test bracket is installed inside the constant temperature chamber, the battery tube is suspended by the test bracket, and the test unit is installed on the test bracket; The test unit includes a test gas circuit, a gas cylinder, an inlet valve, an outlet valve, a pressure gauge, a vacuum pump, an equal diameter tee connector, and an equal diameter right angle two-way connector. The test gas circuit is connected to the gas cylinder, the inlet valve, the outlet valve, and the vacuum pump; The pressure gauge is installed in the test gas path and is used to monitor the test gas path. One end of the equal diameter tee is connected to the test gas path, and the other end of the equal diameter tee is connected to the equal diameter right angle two-way connector. The battery tube includes an integrated vent pipe, an atmosphere chamber, and a base; The integrated vent pipe is connected to the end of the equal diameter right-angle two-way connector away from the equal diameter three-way connector. The integrated vent pipe is connected to the atmosphere chamber, the atmosphere chamber is connected to the base, and the base is provided with several electrode interfaces.

2. The multifunctional button metal battery testing system according to claim 1, characterized in that, Also includes: The air chamber is provided with an external thread, and the base is provided with an internal thread, and the external thread and the internal thread mesh. The base is provided with a washer groove, and a washer is provided in the washer groove; The base is provided with a plurality of battery holders, and the positive and negative terminals of each battery holder pass through an electrode interface, and each battery holder is used to install the battery to be tested.

3. The multifunctional button metal battery testing system according to claim 2, characterized in that, The test support includes: a support body; The support column is composed of several solid steel bars and several steel pipes; Each of the solid steel bars is parallel to the ground, and each of the steel pipes is perpendicular to the ground.

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