Electrolyte solubility testing method, device and system and gas production monitoring method

Abstract

The invention relates to an electrolyte solubility testing method, device and system, a produced gas monitoring method, computer equipment, a storage medium and a computer program product, a controller controls a first gas switch to be turned on, so that produced gas to be tested is input into the testing system, then the controller controls the first gas switch to be turned off, and injection of the produced gas to be tested is completed. And then the controller waits for the electrolyte to dissolve the to-be-measured produced gas, obtains the volume of the injected electrolyte, and obtains a theoretical air pressure parameter when the to-be-measured produced gas is not dissolved and an actual air pressure parameter after the to-be-measured produced gas is dissolved through the air pressure detector. And finally, analyzing by combining the theoretical air pressure parameter, the actual air pressure parameter and the volume of the electrolyte, and determining the solubility of the produced gas to be measured by the electrolyte. Data and theoretical support are provided for monitoring of gas produced by redox decomposition of the electrolyte, the influence of gas produced by absorption of the electrolyte on gas production monitoring can be effectively relieved, and the gas production monitoring precision of the lithium ion battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an electrolyte solubility testing method, device, system, gas production monitoring method, computer equipment, storage medium and computer program product. Background Art

[0002] With the rapid development of science and technology, energy demand is increasing day by day. Since traditional energy will cause pollution during use, research on new environmentally friendly and efficient chemical power sources is an inevitable trend in the future development of energy. With the rapid popularization of portable devices and the development of commercial power batteries, lithium-ion batteries as a new type of secondary battery energy are becoming more and more important in the world's new energy.

[0003] In the related art, when the gas production of the electrolyte redox decomposition of the lithium-ion battery is monitored, the absorption of the gas production by the electrolyte seriously affects the monitoring of the gas production of the lithium-ion battery. Summary of the invention

[0004] Based on this, it is necessary to provide an electrolyte solubility testing method, device, system, gas production monitoring method, computer equipment, storage medium and computer program product to alleviate the impact of electrolyte absorption and gas production on gas production monitoring and improve the gas production monitoring accuracy of lithium-ion batteries.

[0005] A system for testing the solubility of an electrolyte comprises: a sealed liquid injection component, a first gas switch, a first sealed shell, an air pressure detector and a controller, wherein the liquid inlet of the first sealed shell is connected to the sealed liquid injection component via a liquid inlet air pipe, the first end of the first gas switch is used to input a gas product to be tested, the second end of the first gas switch is connected to the liquid inlet air pipe via an air path air pipe, and the air pressure detector is connected to the air path air pipe; the controller is respectively connected to the first gas switch and the air pressure detector.

[0006] The electrolyte solubility test system can inject electrolyte into the first sealed shell through the sealed liquid injection component and the liquid inlet gas pipe. When the test conditions are met, the controller controls the first gas switch to be turned on, so as to input the gas to be tested into the test system. When the input of the gas to be tested meets the target conditions, the controller controls the first gas switch to be turned off to complete the injection of the gas to be tested. After that, the controller waits for the electrolyte to dissolve the gas to be tested, obtains the volume of the injected electrolyte, and obtains the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved through the air pressure detector. Finally, the controller analyzes the theoretical air pressure parameters, the actual air pressure parameters and the volume of the electrolyte to determine the solubility of the electrolyte in the gas to be tested. In this way, the solubility of the electrolyte in the gas to be tested can be obtained, which provides data and theoretical support for the monitoring of the gas production by the redox decomposition of the electrolyte, can effectively alleviate the influence of the electrolyte absorption of gas production on the gas production monitoring, and improve the gas production monitoring accuracy of lithium-ion batteries.

[0007] In some embodiments, the electrolyte solubility testing system further includes a second gas switch, and the first end of the first gas switch inputs the gas to be tested through the second gas switch.

[0008] In the above scheme, a second gas switch is further provided at the first end of the first gas switch, and the input of the gas to be tested is realized through the first gas switch and the second gas switch, which effectively improves the input control reliability of the gas to be tested.

[0009] In some embodiments, the electrolyte solubility testing system further includes a gas extraction device and a third gas switch, wherein a first end of the third gas switch is connected to a first end of the first gas switch, and a second end of the third gas switch is connected to the gas extraction device.

[0010] In the above scheme, a third gas switch and an exhaust device are also connected to the first end of the first gas switch to extract the internal gas of the gas path gas pipe, the liquid inlet gas pipe and the first sealed shell, and replace it with the gas to be tested. When the electrolyte is injected, the solubility test is realized to improve the test accuracy.

[0011] In some embodiments, the electrolyte solubility testing system also includes a three-way valve, a first end of the three-way valve is connected to the first end of the first gas switch, a second end of the three-way valve is connected to the second gas switch, and a third end of the three-way valve is connected to the first end of the third gas switch.

[0012] In the above scheme, the first end of the first gas switch, the second gas switch and the first end of the third gas switch are connected through the three-way valve, thereby improving the connection reliability of the electrolyte solubility test system.

[0013] In some embodiments, the electrolyte solubility testing system further includes a gas pressure measuring device, wherein the gas pressure measuring device is connected to the second end of the second gas switch, and the first end of the second gas switch is connected to the first end of the first gas switch.

[0014] The above scheme, through the provision of the gas pressure measuring device, can monitor the input amount of the gas to be tested during the input of the gas to be tested, thereby inputting an appropriate amount of the gas to be tested and improving the reliability of the solubility test.

[0015] In some embodiments, the electrolyte solubility testing system further includes a second sealed shell and a fourth gas switch, wherein the air inlet of the second sealed shell is connected to the gas circuit pipe, and the fourth gas switch is arranged in the gas circuit pipe between the second sealed shell and the liquid inlet pipe.

[0016] In the above scheme, a second sealed shell is also connected to the gas circuit and gas pipe, and a fourth gas switch is further provided on the gas circuit and gas pipe between the second sealed shell and the liquid inlet gas pipe. The content of the input gas to be tested can be adjusted through the second sealed shell and the fourth gas switch, thereby changing the test environment pressure and realizing solubility testing under different test environment pressures.

[0017] In some embodiments, the electrolyte solubility testing system also includes a four-way valve, a first end of the four-way valve is connected to the second end of the first gas switch, the second end of the four-way valve is connected to the air pressure detector, the third end of the four-way valve is connected to the fourth gas switch through the gas path pipe, and the fourth end of the four-way valve is connected to the air inlet of the second sealed shell.

[0018] In the above scheme, the air pressure detector, the fourth gas switch, the air inlet of the second sealed shell and the second end of the first gas switch are connected through the four-way valve, so as to further improve the connection reliability of the electrolyte solubility test system.

[0019] In some embodiments, the electrolyte solubility testing system further includes a volume increment meter connected to the first end of the first gas switch.

[0020] In the above scheme, a volume increment measuring device is also connected to the first end of the first gas switch, and the volume change can be detected when the volume increment measuring device is connected to the gas path gas pipe, thereby achieving more accurate measurement of the preset system volume parameters.

[0021] In some embodiments, the electrolyte solubility testing system further includes an adjustable heat bath container, and the first sealed shell is disposed in the adjustable heat bath container.

[0022] In the above scheme, the first sealed shell is arranged in an adjustable heat bath container with adjustable temperature. By adjusting the temperature of the adjustable heat bath container, the test environment temperature is changed, thereby realizing the solubility test under different test environment temperatures.

[0023] An electrolyte solubility testing method based on the above-mentioned electrolyte solubility testing system includes: when the test conditions are met, controlling the first gas switch to be turned on to input the gas to be tested; when the input of the gas to be tested meets the target conditions, controlling the first gas switch to be turned off; obtaining the volume of the electrolyte injected into the first sealed shell; obtaining the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved; determining the solubility of the electrolyte in the gas to be tested based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume.

[0024] The above scheme can inject electrolyte into the first sealed shell through the sealed liquid injection component and the liquid inlet gas pipe. When the test conditions are met, the controller controls the first gas switch to be turned on, so as to input the gas to be tested into the test system. When the input of the gas to be tested meets the target conditions, the controller controls the first gas switch to be turned off to complete the injection of the gas to be tested. After that, the controller waits for the electrolyte to dissolve the gas to be tested, obtains the volume of the injected electrolyte, and obtains the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved through the air pressure detector. Finally, the controller analyzes the theoretical air pressure parameters, the actual air pressure parameters and the volume of the electrolyte to determine the solubility of the electrolyte in the gas to be tested. In this way, the solubility of the electrolyte in the gas to be tested can be obtained, which provides data and theoretical support for the monitoring of the gas production by the redox decomposition of the electrolyte, can effectively alleviate the influence of the electrolyte absorption of gas production on the gas production monitoring, and improve the gas production monitoring accuracy of lithium-ion batteries.

[0025] In some embodiments, after obtaining the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved, it also includes: controlling the fourth gas switch arranged in the gas circuit to be cut off, and the first gas switch to be turned on, so as to increase the pressure of the test environment for adjusting the gas to be tested; when the increase of the gas to be tested is completed, controlling the first gas switch to be cut off, and the fourth gas switch to be turned on, and returning to execute the steps of obtaining the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved.

[0026] In the above scheme, the input gas content to be tested can be adjusted through the second sealed housing, the first gas switch and the fourth gas switch, thereby changing the test environment pressure and realizing solubility testing under different test environment pressures.

[0027] In some embodiments, after obtaining the theoretical air pressure parameters when the gas to be measured is not dissolved, and the actual air pressure parameters collected by the air pressure detector after the gas to be measured is dissolved, it also includes: adjusting the temperature of the adjustable hot bath container provided with the first sealed shell to adjust the test environment temperature, and returning to execute the steps of obtaining the theoretical air pressure parameters when the gas to be measured is not dissolved, and the actual air pressure parameters after the gas to be measured is dissolved.

[0028] In the above scheme, the first sealed shell is arranged in an adjustable heat bath container with adjustable temperature. By adjusting the temperature of the adjustable heat bath container, the test environment temperature is changed, thereby realizing the solubility test under different test environment temperatures.

[0029] In some embodiments, obtaining the theoretical gas pressure parameters when the gas to be tested is not dissolved includes: analyzing according to the electrolyte volume, the preset system volume parameters, and the preset theoretical pressure model to determine the theoretical gas pressure parameters when the gas to be tested is not dissolved.

[0030] The above scheme uses a preset theoretical pressure model for analysis to determine the theoretical gas pressure parameters when the gas to be measured is not dissolved under the current electrolyte volume and preset system volume parameters, which has the advantages of simple analysis method and high efficiency.

[0031] In some embodiments, the method for determining the preset system volume parameter includes: controlling the first gas switch to be turned on to input test gas; when the test gas input is completed, controlling the first gas switch to be turned off and obtaining the initial pressure parameter; when the volume increment measurer is connected, controlling the first gas switch to be turned on; obtaining the actual pressure parameter and the gas increment of the volume increment measurer; and determining the preset system volume parameter based on the initial pressure parameter, the actual pressure parameter and the gas increment.

[0032] In the above scheme, when the test gas is input and the volume increment measuring device is connected, the initial pressure parameters and the actual pressure parameters are obtained respectively, and the gas increment measured when the volume increment measuring device is connected is analyzed to finally determine the preset system volume parameters, which has a high accuracy in testing the preset system volume parameters.

[0033] In some embodiments, determining the preset system volume parameter based on the initial pressure parameter, the actual pressure parameter and the gas increment includes: obtaining the total volume of the volume increment measurer, the liquid inlet gas pipe and the gas circuit gas pipe; determining the preset system volume parameter based on the initial pressure parameter, the actual pressure parameter, the gas increment, the total volume and a preset ideal gas state model.

[0034] The above scheme, combined with a preset ideal gas state model to determine the preset system volume parameters, has the advantages of simple analysis method and high efficiency.

[0035] In some embodiments, when the test conditions are met, before controlling the first gas switch to turn on to input the gas to be tested, it also includes: controlling the sealed liquid injection component to open to inject electrolyte into the first sealed shell; when the electrolyte injection is completed and the sealed liquid injection component is closed, performing a closed test on the electrolyte solubility test system; when the closed test is successful, it is determined that the test conditions are met.

[0036] In the above scheme, before inputting the gas to be tested, the electrolyte solubility test system will be subjected to a closed test. If the closed test is successful, that is, the airtightness is good, the solubility test operation is performed to improve the accuracy of the solubility test.

[0037] In some embodiments, obtaining actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved includes: controlling the shaking of the first sealed shell with a preset time period as a period; when the fluctuation of the pressure data collected by the air pressure detector is less than a preset fluctuation threshold, using the pressure data as the actual air pressure parameter.

[0038] In the above scheme, during the solubility test, it is necessary to shake the first sealed shell so that the gas to be tested can be fully absorbed. When the fluctuation of the pressure data collected by the air pressure detector is less than the preset fluctuation threshold, the pressure data is used as the actual air pressure parameter to improve the test accuracy of the actual air pressure parameter.

[0039] In some embodiments, after determining the solubility of the electrolyte to the gas product to be tested based on the theoretical air pressure parameter, the actual air pressure parameter and the electrolyte volume, it also includes: storing the solubility in correspondence with the current test environment temperature and the current test environment pressure to obtain the corresponding relationship between the test environment temperature, the test environment pressure and the solubility.

[0040] The above scheme stores the solubility obtained from the actual test in correspondence with the test environment temperature and the test environment pressure, and can be directly called during the subsequent gas production analysis, thereby providing reliable data support for gas production monitoring and improving the reliability of gas production monitoring.

[0041] A gas production monitoring method includes: obtaining an ambient temperature and an ambient pressure; determining the actual solubility of an electrolyte to gas production according to the ambient temperature, the ambient pressure, and the corresponding relationship between the test ambient temperature, the test ambient pressure and the solubility; and determining the gas production according to the actual solubility.

[0042] In the above scheme, when monitoring gas production, the solubility of the electrolyte to the gas to be measured under the current conditions is matched according to the current ambient temperature and ambient pressure, and then the gas production is analyzed in combination with the solubility, so as to obtain a more accurate gas production.

[0043] A device for testing the solubility of an electrolyte, comprising: a gas production input module, used to control a first gas switch to be turned on to input a gas to be tested when a test condition is met; a cut-off control module, used to control the first gas switch to be turned off when the input of the gas to be tested meets a target condition; a volume acquisition module, used to obtain the volume of the electrolyte injected into a first sealed shell; an air pressure acquisition module, used to obtain theoretical air pressure parameters when the gas to be tested is not dissolved, and actual air pressure parameters after the gas to be tested is dissolved; and a solubility determination module, used to determine the solubility of the electrolyte in the gas to be tested based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume.

[0044] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the steps of the above method when executing the computer program.

[0045] A computer-readable storage medium stores a computer program, which implements the steps of the above method when executed by a processor.

[0046] A computer program product comprises a computer program, which implements the steps of the above method when executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0048] Figure 1 This is a schematic diagram of the structure of the electrolyte solubility test system in some embodiments of the present application;

[0049] Figure 2 This is a schematic diagram of the structure of an electrolyte solubility test system in some other embodiments of the present application;

[0050] Figure 3 This is a schematic diagram of the structure of an electrolyte solubility test system in some other embodiments of the present application;

[0051] Figure 4 This is a schematic diagram of the structure of an electrolyte solubility test system in some other embodiments of the present application;

[0052] Figure 5 This is a schematic diagram of the flow chart of the electrolyte solubility test method in some embodiments of the present application;

[0053] Figure 6 This is a schematic flow chart of the electrolyte solubility test method in other embodiments of the present application;

[0054] Figure 7 This is a schematic diagram of the flow chart of the electrolyte solubility test method in some other embodiments of the present application;

[0055] Figure 8 This is a schematic diagram of the closed test process in some embodiments of the present application;

[0056] Fig. 9 This is a flow chart of a method for testing electrolyte solubility in some embodiments of the present application;

[0057] Fig.10 This is a flow chart of a gas production monitoring method in some embodiments of the present application;

[0058] Fig.11 This is a schematic diagram of solubility at different test environment pressures when the test environment temperature is 295.15K in one embodiment of the present application;

[0059] Fig.12 This is a schematic diagram of solubility at different test environment temperatures when the test environment pressure is a standard atmospheric pressure in one embodiment of the present application;

[0060] Fig.13 This is a schematic diagram of the structure of an electrolyte solubility test device in some embodiments of the present application;

[0061] Fig.14 This is a schematic diagram of the structure of an electrolyte solubility testing device in some other embodiments of the present application;

[0062] Fig.15 This is a schematic diagram of the structure of an electrolyte solubility test device in some other embodiments of the present application;

[0063] Fig.16 This is a schematic diagram of the structure of an electrolyte solubility testing device in some other embodiments of the present application;

[0064] Fig.17 This is a schematic diagram of the structure of an electrolyte solubility testing device in some other embodiments of the present application. DETAILED DESCRIPTION

[0065] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0068] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0071] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0072] Among all types of power batteries, lithium-ion batteries are widely used in the field of new energy due to their advantages such as long cycle life, environmental protection, non-toxicity and pollution-free, fast charging and discharging speed, high energy density, large capacity and light volume. As the electrolyte of lithium ion transmission carrier in lithium-ion batteries, there is redox decomposition and gas production in the actual application process. Monitoring the gas production of lithium-ion batteries is an important means to improve the reliability of lithium battery operation. However, in actual situations, the electrolyte still absorbs gas production, which seriously affects the accuracy of gas production monitoring of lithium-ion batteries.

[0073] Based on this, in order to alleviate the impact of electrolyte gas absorption on gas production monitoring, considering that it is difficult to take out the electrolyte for treatment after being injected into the lithium-ion battery, experimental analysis can be carried out before the electrolyte is injected into the lithium-ion battery, or using the same type of electrolyte as the electrolyte injected into the lithium-ion battery to obtain the electrolyte's absorption of gas production, that is, the solubility.

[0074] The technical solution of the present application is to build an electrolyte solubility test system through a first gas switch, a sealed liquid injection component, a test sealed shell, an air pressure detector and a controller, and inject electrolyte into the test sealed shell through the sealed liquid injection component and the liquid inlet gas pipe. After that, the controller controls the first gas switch to be turned on, so as to input the gas to be tested into the test system. When the input of the gas to be tested meets the target conditions, the controller controls the first gas switch to be turned off to complete the injection of the gas to be tested. Then, the controller waits for the electrolyte to dissolve the gas to be tested, obtains the volume of the injected electrolyte, and obtains the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved through the air pressure detector. Finally, the controller combines the theoretical air pressure parameters, the actual air pressure parameters and the volume of the electrolyte for analysis to determine the solubility of the electrolyte in the gas to be tested.

[0075] Through the technical solution of the embodiment of the present application, the solubility of the electrolyte in the gas production to be measured is obtained, which provides data and theoretical support for the monitoring of gas production by electrolyte redox decomposition, can effectively alleviate the impact of electrolyte absorption of gas production on gas production monitoring, and improve the gas production monitoring accuracy of lithium-ion batteries.

[0076] The electrolyte solubility testing system provided in the embodiment of the present application is used in the scenario of monitoring the gas production of lithium batteries. Before monitoring the gas production of lithium batteries, the electrolyte solubility testing system of the embodiment of the present application can be used to perform a solubility test on the gas to be measured, and the solubility of the electrolyte in the gas to be measured under different ambient temperatures and ambient pressures can be obtained. In the subsequent gas production monitoring, the corresponding solubility can be matched to the current lithium battery in combination with the actual ambient temperature and ambient pressure, so as to take into account the part of the gas to be measured dissolved in the electrolyte, so that the gas production monitoring result of the lithium battery is more accurate.

[0077] It should be noted that the specific type of electrolyte is not unique. As long as it can transmit lithium ions, decompose and produce gas during the operation of the lithium-ion battery, and the decomposed gas will be reabsorbed by itself, it can be of this type of electrolyte, which may include a series of organic substances (carbonates) and inorganic substances, and is not specifically limited. The decomposition gas of the electrolyte is not unique. In order to facilitate the understanding of the technical solution of the present application, the following embodiments can be understood as the decomposition gas (or the gas to be measured) is carbon dioxide (CO2).

[0078] The technical solution of the embodiment of the present application can be that before the lithium battery is assembled, part of the electrolyte is injected into the electrolyte solubility test system for testing, and the gas production to be tested is input for testing based on the actual situation of the electrolyte gas production, and the solubility of the electrolyte in the gas production to be tested under different ambient temperatures and ambient pressures is obtained, and the corresponding solubility is subsequently matched directly according to the actual ambient temperature and pressure. It can also be that after the lithium battery is assembled, before the lithium battery has a gas production monitoring demand, the same type of electrolyte as the current lithium battery is used, and injected into the electrolyte solubility test system for testing, so as to obtain the solubility of the electrolyte in the gas production to be tested under the current ambient temperature and the current ambient pressure, and the specific selection can be based on actual needs.

[0079] See also Figure 1 , an electrolyte solubility test system, comprising: a sealed liquid injection component 11, a first gas switch 12, a first sealed shell 14, an air pressure detector 13 and a controller (not shown), the liquid inlet of the first sealed shell 14 is connected to the sealed liquid injection component 11 through a liquid inlet air pipe 16, the first end of the first gas switch 12 is used to input the gas to be tested, the second end of the first gas switch 12 is connected to the liquid inlet air pipe 16 through an air path air pipe 15, and the air pressure detector 13 is connected to the air path air pipe 15; the controller is respectively connected to the first gas switch 12 and the air pressure detector 13.

[0080] Specifically, the sealed liquid injection assembly 11 is a device that can perform electrolyte injection operations and can be sealed after the injection is completed. The first sealed housing 14 refers to a device in which the entire housing is in a sealed state when the liquid inlet is sealed. The first gas switch 12 is a device that can allow gas to flow through through conduction control and block gas flow through cutoff control. The air pressure detector 13 is a device used to detect air pressure.

[0081] According to the technical solution of this embodiment, when the sealed liquid injection component 11 is closed and the first gas switch 12 is turned off, the gas circuit gas pipe 15, the liquid inlet gas pipe 16 and the first sealed shell 14 will form a closed space. Therefore, in the actual test process, it is necessary to first control the sealed liquid injection component 11 to open, inject electrolyte into the first sealed shell 14 through the liquid inlet gas pipe 16, and then control the sealed liquid injection component 11 to close. Then, the first gas switch 12 is controlled to be turned on, and the gas to be tested is input into the electrolyte solubility test system. After the input of the gas to be tested is completed, the first gas switch 12 is controlled to be turned off, so that the gas to be tested is dissolved in the first sealed shell 14.

[0082] After the gas product to be tested is dissolved and stabilized, the pressure data in the current state is obtained through the pressure detector 13 as the actual pressure parameter. The controller also obtains the theoretical pressure parameter that the system can reach when the gas product to be tested is not absorbed and dissolved, as well as the volume of the injected electrolyte. Finally, the controller analyzes the theoretical pressure parameter, the actual pressure parameter and the electrolyte volume to determine the solubility of the electrolyte in the gas product to be tested.

[0083] It should be noted that the type of the first sealed shell 14 is not unique, as long as it can contain electrolyte and withstand a certain pressure. For example, in a more detailed embodiment, in order to better simulate the gas production and dissolution of the lithium battery to be tested, the battery shell can be used as the first sealed shell 14. The specific type of the air pressure detector 13 is also not unique, and can be a pressure sensor, etc., which is not specifically limited. For example, in a more detailed embodiment, a pressure gauge can be used to realize air pressure detection.

[0084] It can be understood that the specific type of the sealed liquid injection component 11 is not unique. In a more detailed embodiment, the sealed liquid injection component 11 includes a vent cover, a sealing gasket and an adapter. The adapter, the sealing gasket and the vent cover are sequentially arranged at the end of the liquid inlet pipe 16 away from the first sealed shell 14. When the vent cover is opened, the liquid injection operation can be realized, and when the vent cover is closed, the sealing function is realized.

[0085] The specific type of the first gas switch 12 is not limited, as long as it can realize the type of switch that can control the gas flow, for example, in a more detailed embodiment, the first gas switch 12 includes a gas valve. More specifically, in one embodiment, the first gas switch 12 includes a thickened ball gas valve.

[0086] The electrolyte solubility test system can inject electrolyte into the first sealed shell 14 through the sealed liquid injection component 11 and the liquid inlet gas pipe 16. When the test conditions are met, the first gas switch 12 is controlled by the controller to be turned on, so as to input the gas to be tested into the test system. When the input of the gas to be tested meets the target conditions, the controller controls the first gas switch 12 to be turned off to complete the injection of the gas to be tested. After that, the controller waits for the electrolyte to dissolve the gas to be tested, obtains the volume of the injected electrolyte, and obtains the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved through the air pressure detector 13. Finally, the controller analyzes the theoretical air pressure parameters, the actual air pressure parameters and the volume of the electrolyte to determine the solubility of the electrolyte in the gas to be tested. In this way, the solubility of the electrolyte in the gas to be tested can be obtained, and data and theoretical support can be provided for the monitoring of the gas production by the redox decomposition of the electrolyte, which can effectively alleviate the influence of the electrolyte absorption of gas production on the gas production monitoring, and improve the gas production monitoring accuracy of lithium-ion batteries.

[0087] See also Figure 2 In some embodiments, the electrolyte solubility test system further includes a second gas switch 21 , and the first end of the first gas switch 12 inputs the gas to be tested through the second gas switch 21 .

[0088] Specifically, the second gas switch 21 is connected to the controller (not shown), specifically, the control end of the second gas switch 21 is connected to the controller. The first gas switch 12 is used to input the first end of the gas to be tested, and is also connected to the second gas switch 21. Therefore, in actual application scenarios, when it is necessary to input the gas to be tested to the gas line gas pipe 15, the liquid inlet gas pipe 16 and the first sealed shell 14 through the first gas switch 12, it is necessary to turn on the first gas switch 12 and the second gas switch 21 at the same time. When both the first gas switch 12 and the second gas switch 21 are cut off, the input of the gas to be tested is stopped. In this way, if one of the first gas switch 12 or the second gas switch 21 leaks, the electrolyte solubility test system can still form a closed space through the other one to complete the solubility test.

[0089] It is understandable that the type of the second gas switch 21 is not unique, and it can be set to be the same type as the first gas switch 12, or it can be different, as long as it can achieve on-off control of the airflow by turning it on and off.

[0090] In the above scheme, a second gas switch 21 is further provided at the first end of the first gas switch 12, and the input of the gas to be tested is realized through the first gas switch 12 and the second gas switch 21, which effectively improves the input control reliability of the gas to be tested.

[0091] See also Figure 2In some embodiments, the electrolyte solubility testing system further includes a vacuum device 23 and a third gas switch 22 , wherein a first end of the third gas switch 22 is connected to a first end of the first gas switch 12 , and a second end of the third gas switch 22 is connected to the vacuum device 23 .

[0092] Specifically, the control end of the third gas switch 22 and the air extraction device 23 are respectively connected to the controller (not shown). In the scheme of this embodiment, a third gas switch 22 and an air extraction device 23 are also provided at the first end of the first gas switch 12. When the solubility test is performed on the gas to be tested and the gas to be tested is input, it is necessary to completely replace the original air inside the electrolyte solubility test system by inputting the gas to be tested. In the actual use scenario, the first end of the third gas switch 22 is connected to the first end of the first gas switch 12 and the first end of the second gas switch 21. The controller controls the first gas switch 12 and the third gas switch 22 to be turned on, and the second gas switch 21 to be turned off. At the same time, the air extraction device 23 is controlled to start and operate to extract the air; then the second gas switch 21 is turned on to input the gas to be tested.

[0093] Specifically, the controller first controls the second gas switch 21 to be turned off, the first gas switch 12 and the third gas switch 22 to be turned on, and the exhaust device 23 is turned on to extract air. When the pressure data detected by the air pressure detector 13 reaches the first preset atmospheric pressure (which can be a negative standard atmospheric pressure), the third gas switch 22 is controlled to be turned off, the second gas switch 21 is turned on, and the gas to be tested is input into the electrolyte solubility test system. When the input of the gas to be tested makes the pressure data detected by the air pressure detector 13 reach the second preset atmospheric pressure (greater than the first preset atmospheric pressure, which can be a positive standard atmospheric pressure), the second gas switch 21 is controlled to be turned off, the input of the gas to be tested is stopped, and the third gas switch 22 is controlled to be turned on again to exhaust gas. This cycle is repeated multiple times (it can be 2-5 times or more, which can be selected in combination with the actual scenario), and the interior of the electrolyte solubility test system can be completely replaced with the gas to be tested.

[0094] It should be noted that the specific type of the exhaust device 23 is not limited, and any device that can extract gas can be used. For example, in a more detailed embodiment, the exhaust device 23 includes a vacuum pump.

[0095] In the above scheme, a third gas switch 22 and an exhaust device 23 are also connected to the first end of the first gas switch 12, so that the internal gas of the gas circuit air pipe 15, the liquid inlet air pipe 16 and the first sealed shell 14 can be extracted and replaced with the gas to be tested. When the electrolyte is injected, the solubility test is realized to improve the test accuracy.

[0096] See also Figure 3In some embodiments, the electrolyte solubility testing system also includes a three-way valve 31, a first end of the three-way valve 31 is connected to a first end of the first gas switch 12, a second end of the three-way valve 31 is connected to the second gas switch 21, and a third end of the three-way valve 31 is connected to a first end of the third gas switch 22.

[0097] Specifically, in the solution of this embodiment, a three-way valve 31 is further provided at the common connection position of the first end of the first gas switch 12, the second gas switch 21 (specifically the first end) and the first end of the third gas switch 22, and the connection of the three gas switches is achieved through the three-way valve 31.

[0098] In the above scheme, the first end of the first gas switch 12, the second gas switch 21 and the first end of the third gas switch 22 are connected through the three-way valve 31, thereby improving the connection reliability of the electrolyte solubility test system.

[0099] See also Figure 4 In some embodiments, the electrolyte solubility testing system further includes a pressure measuring device 41 , which is connected to the second end of the second gas switch 21 , and the first end of the second gas switch 21 is connected to the first end of the first gas switch 12 .

[0100] Specifically, the air pressure measuring device 41 is also connected to the controller (not shown). In the scheme of this embodiment, the first end of the second gas switch 21 is connected to the first gas switch 12, and the gas to be tested is first input from the second end of the second gas switch 21, and then flows into the gas circuit 15 through the first gas switch 12. In the actual test scenario, in order to realize the monitoring of the input gas to be tested, or the monitoring of the gas to be tested added during the test, a pressure measuring device 41 is also provided at the second end of the second gas switch 21, and the amount of the input gas to be tested is reflected by the detected air pressure. For example, in a more detailed embodiment, by inputting an appropriate amount of gas to be tested, the pressure data collected by the air pressure measuring device 41 reaches 0.1Mpa (megapascals)-0.3Mpa, etc., which is not specifically limited.

[0101] In the above scheme, by setting the gas pressure measuring device 41, the input amount of the gas to be measured can be monitored during the input of the gas to be measured, so as to input an appropriate amount of the gas to be measured, thereby improving the reliability of the solubility test.

[0102] See also Figure 4 In some embodiments, the electrolyte solubility testing system also includes a second sealed shell 43 and a fourth gas switch 42, the air inlet of the second sealed shell 43 is connected to the air circuit pipe 15, and the fourth gas switch 42 is arranged on the air circuit pipe 15 between the second sealed shell 43 and the liquid inlet pipe 16.

[0103] Specifically, the fourth gas switch 42 is connected to the controller, and specifically, the control end of the fourth gas switch 42 is connected to the controller (not shown). The solution of this embodiment adjusts the content of the gas to be tested in the system through the second sealed shell 43 to change the test environment pressure of the gas to be tested. Specifically, in an actual scenario, the controller controls the fourth gas switch 42 to be cut off, turns on the first gas switch 12 to add a certain amount of gas to be tested to the system, and then controls the first gas switch 12 to be cut off. After waiting for the internal air pressure of the system to stabilize, the fourth gas switch 42 is controlled to be turned on to change the test environment pressure of the system.

[0104] In the actual test scenario, if there are test requirements for multiple test environment pressures, it is only necessary to control the four gas switches to be cut off after each solubility test of the produced gas to be tested is completed, and turn on the first gas switch 12 to add a certain amount of produced gas to be tested to the system, thereby increasing the test environment pressure for testing.

[0105] In the above scheme, a second sealed shell 43 is also connected to the gas circuit pipe 15, and a fourth gas switch 42 is further provided on the gas circuit pipe 15 between the second sealed shell 43 and the liquid inlet gas pipe 16. The content of the input gas to be tested can be adjusted through the second sealed shell 43 and the fourth gas switch 42, thereby changing the test environment pressure and realizing solubility testing under different test environment pressures.

[0106] Please refer to Figure 4 In some embodiments, the electrolyte solubility testing system also includes a four-way valve 44, a first end of the four-way valve 44 is connected to the second end of the first gas switch 12, a second end of the four-way valve 44 is connected to the air pressure detector 13, a third end of the four-way valve 44 is connected to the fourth gas switch 42 through the air path air pipe 15, and a fourth end of the four-way valve 44 is connected to the air inlet of the second sealed shell 43.

[0107] Specifically, in the scheme of this embodiment, a four-way valve 44 is also provided at the common connection position of the air pressure detector 13, the second end of the first gas switch 12, the fourth gas switch 42 and the air inlet of the second sealed shell 43. The connection between the four is achieved through the four-way valve 44, so that the air pressure of the first gas switch 12, the air pressure detector 13, the second sealed shell 43 and the fourth gas switch 42 is consistent.

[0108] In the above scheme, the air pressure detector 13, the fourth gas switch 42, the air inlet of the second sealed shell 43 and the second end of the first gas switch 12 are connected through the four-way valve 44, so as to further improve the connection reliability of the electrolyte solubility test system.

[0109] In some embodiments, the electrolyte solubility testing system further includes a volume increment meter, which is connected to the first end of the first gas switch 12 .

[0110] Specifically, the volume increment measuring device is connected to the controller (not shown). The volume increment measuring device is a device that detects the change when the internal air pressure of the volume increment measuring device is inconsistent with the air pressure of the gas line gas pipe 15 and the internal volume of the volume increment measuring device changes due to the air pressure of the gas line gas pipe 15 when the volume increment measuring device is connected to the gas line gas pipe 15. In the actual test scenario, since the gas line gas pipe 15 and the liquid inlet gas pipe 16 are injected with the gas to be tested, but the volume increment measuring device is not injected with the gas to be tested, when the volume increment measuring device is connected to the first end of the first gas switch 12 and the first gas switch 12 is turned on, the internal volume of the volume increment measuring device will change due to the pressure difference between the two.

[0111] It should be noted that the specific type of volume increment measuring device is not exclusive, and in a more detailed embodiment, the volume increment measuring device includes a syringe.

[0112] In the above scheme, a volume increment measuring device is also connected to the first end of the first gas switch 12, and when the volume increment measuring device is connected to the gas line gas pipe 15, the volume change can be detected, thereby achieving more accurate measurement of the preset system volume parameters.

[0113] In some embodiments, the electrolyte solubility testing system further includes an adjustable heat bath container, and the first sealed housing 14 is disposed in the adjustable heat bath container.

[0114] Specifically, the adjustable hot bath container is a hot bath container in which the temperature of the liquid contained and used for hot bathing can be adjusted. The liquid type of the adjustable hot bath container is not unique. In a more detailed embodiment, it can be water or oil, which is not specifically limited.

[0115] In the solution of this embodiment, the first sealed shell 14 is arranged in an adjustable hot bath container. When there is a test requirement for different test environment temperatures, it is only necessary to adjust the temperature of the adjustable hot bath container. It should be pointed out that the temperature adjustment method of the adjustable hot bath container is not unique. In a more detailed embodiment, the temperature of the adjustable hot bath container can be increased by heating, thereby raising the test environment temperature. In another embodiment, a liquid with a higher temperature can be injected into the adjustable hot bath container to increase the test environment temperature, or a liquid with a lower temperature can be injected to lower the test environment temperature, which can be selected in combination with actual needs.

[0116] In the above scheme, the first sealed shell 14 is disposed in an adjustable heat bath container with adjustable temperature. By adjusting the temperature of the adjustable heat bath container, the test environment temperature is changed, thereby achieving solubility testing at different test environment temperatures.

[0117] See also Figure 5, an electrolyte solubility testing method based on the above-mentioned electrolyte solubility testing system includes step 501, step 502, step 503, step 504 and step 505.

[0118] Step 501, when the test conditions are met, the first gas switch is controlled to be turned on to input the produced gas to be tested.

[0119] Step 502: When the gas input to be tested meets the target condition, the first gas switch is controlled to be turned off.

[0120] Step 503, obtaining the volume of electrolyte injected into the first sealed housing.

[0121] Step 504, obtaining theoretical air pressure parameters when the produced gas to be measured is not dissolved, and actual air pressure parameters collected by the air pressure detector after the produced gas to be measured is dissolved.

[0122] Step 505, determining the solubility of the electrolyte in the gas to be measured based on the theoretical gas pressure parameter, the actual gas pressure parameter and the volume of the electrolyte.

[0123] Specifically, the electrolyte solubility test system is as shown in the above-mentioned embodiments and the accompanying drawings, and the test conditions refer to the conditions that are met when the preparations for the solubility test have been completed and the solubility test can be successfully started. It should be noted that the types of test conditions that meet the test conditions are not unique. In one embodiment, the test conditions are considered to be met when the electrolyte solubility test system has good airtightness. In another embodiment, the test conditions can also be considered to be met when the electrolyte solubility test system has good airtightness and the electrolyte to be tested has been injected.

[0124] The input of the gas to be tested meeting the target condition means that an appropriate amount of the gas to be tested is input into the electrolyte solubility test system. For example, in a more detailed embodiment, the input of the gas to be tested may make the pressure of the electrolyte solubility test system reach 0.1Mpa-0.3Mpa.

[0125] The controller controls the first gas switch to be turned on, inputs the gas to be tested into the electrolyte solubility test system, and after the gas to be tested is input, controls the first gas switch to be turned off, so that the gas to be tested is dissolved in the first sealed shell.

[0126] After the gas to be tested is dissolved and stabilized, the pressure data in the current state is obtained through the pressure detector as the actual pressure parameter. The controller also obtains the theoretical pressure parameter that the system can reach when the gas to be tested is not absorbed and dissolved, as well as the volume of the injected electrolyte. Finally, the controller analyzes the theoretical pressure parameter, actual pressure parameter and electrolyte volume to determine the solubility of the electrolyte in the gas to be tested.

[0127] It should be noted that there is not only one way to obtain the volume of the electrolyte. In a more detailed embodiment, it can be obtained by analyzing the volume change of the electrolyte extraction instrument before and after extraction. For example, in a more detailed embodiment, the electrolyte can be extracted by a syringe, and the volume and mass of the electrolyte injected into the first sealed shell can be determined based on the weight and volume changes before and after the syringe is extracted. In other embodiments, it can also be obtained by testing in other ways, which are not specifically limited.

[0128] It can be understood that there is not only one way to determine the solubility of the electrolyte in the gas production to be measured based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume. In a more detailed embodiment, the controller pre-stores a solubility calculation model. After the controller obtains the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume, it substitutes them into the solubility calculation model for calculation to obtain the solubility of the electrolyte in the gas production to be measured in the current state.

[0129] The specific type of solubility calculation model is not unique. In a more detailed embodiment, the solubility is directly characterized by gas pressure, and the corresponding solubility calculation model includes: Among them, C P represents solubility, p0 represents theoretical pressure parameter, p represents actual pressure parameter, V e Indicates the volume of the electrolyte. Through this calculation method, the solubility of the electrolyte in the gas to be tested under the current test environment and the test environment pressure p0 can be obtained.

[0130] The above scheme can inject electrolyte into the first sealed shell through the sealed liquid injection component and the liquid inlet gas pipe. When the test conditions are met, the controller controls the first gas switch to be turned on, so as to input the gas to be tested into the test system. When the input of the gas to be tested meets the target conditions, the controller controls the first gas switch to be turned off to complete the injection of the gas to be tested. After that, the controller waits for the electrolyte to dissolve the gas to be tested, obtains the volume of the injected electrolyte, and obtains the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved through the air pressure detector. Finally, the controller analyzes the theoretical air pressure parameters, the actual air pressure parameters and the volume of the electrolyte to determine the solubility of the electrolyte in the gas to be tested. In this way, the solubility of the electrolyte in the gas to be tested can be obtained, which provides data and theoretical support for the monitoring of the gas production by the redox decomposition of the electrolyte, can effectively alleviate the influence of the electrolyte absorption of gas production on the gas production monitoring, and improve the gas production monitoring accuracy of lithium-ion batteries.

[0131] See also Figure 6 In some embodiments, after step 504 , the method further includes steps 602 and 604 .

[0132] Step 602, controlling the fourth gas switch disposed in the gas line gas pipe to be turned off, and the first gas switch to be turned on, so as to increase the pressure of the test environment for adjusting the gas production to be tested.

[0133] Step 604, when the gas production to be measured is increased, the first gas switch is controlled to be turned off and the fourth gas switch is controlled to be turned on.

[0134] And return to execute the operation of obtaining the theoretical gas pressure parameters when the gas to be measured is not dissolved, and the actual gas pressure parameters after the gas to be measured is dissolved.

[0135] Specifically, the solution of this embodiment adjusts the content of the gas to be tested in the system through the second sealed shell to change the test environment pressure of the gas to be tested. In the actual scenario, the controller controls the fourth gas switch to be turned off, turns on the first gas switch to add a certain amount of gas to be tested to the system, then controls the first gas switch to be turned off, waits for the internal gas pressure of the system to stabilize, and then controls the fourth gas switch to be turned on to change the test environment pressure of the system.

[0136] In actual test scenarios, if there are test requirements for multiple test environment pressures, it is only necessary to control the four gas switches to be cut off after each solubility test of the gas to be tested is completed, turn on the first gas switch to add a certain amount of the gas to be tested to the system, and increase the test environment pressure for testing.

[0137] In the above scheme, the input gas content to be tested can be adjusted through the second sealed housing, the first gas switch and the fourth gas switch, thereby changing the test environment pressure and realizing solubility testing under different test environment pressures.

[0138] See also Figure 7 In some embodiments, after step 504 , the method further includes step 702 .

[0139] Step 702: Adjust the temperature of an adjustable heat bath container provided with a first sealed shell to adjust the test environment temperature.

[0140] And return to execute the operation of obtaining the theoretical gas pressure parameters when the gas to be measured is not dissolved, and the actual gas pressure parameters after the gas to be measured is dissolved.

[0141] Specifically, the first sealed shell is arranged in an adjustable hot bath container. When there is a test requirement for different test environment temperatures, it is only necessary to adjust the temperature of the adjustable hot bath container. It should be noted that the temperature adjustment method of the adjustable hot bath container is not unique. In a more detailed embodiment, the temperature of the adjustable hot bath container can be increased by heating, thereby raising the test environment temperature. In another embodiment, a liquid with a higher temperature can be injected into the adjustable hot bath container to raise the test environment temperature, or a liquid with a lower temperature can be injected to lower the test environment temperature, and the specific selection can be combined with actual needs.

[0142] In the above scheme, the first sealed shell is arranged in an adjustable heat bath container with adjustable temperature. By adjusting the temperature of the adjustable heat bath container, the test environment temperature is changed, thereby realizing the solubility test under different test environment temperatures.

[0143] In some embodiments, obtaining theoretical gas pressure parameters when the gas to be tested is not dissolved includes: analyzing according to the electrolyte volume, preset system volume parameters, and a preset theoretical pressure model to determine the theoretical gas pressure parameters when the gas to be tested is not dissolved.

[0144] Specifically, the preset system volume parameter is the preset volume of the electrolyte solubility test system on the second end side of the first gas switch, specifically including the sum of the volume of the first sealed housing, the volume of the gas path gas pipe, and the volume of the liquid inlet gas pipe. The preset system volume parameter can be obtained through experimental measurement after the electrolyte solubility test system is built, and stored in the controller, and can be directly called when performing the solubility test later.

[0145] The preset theoretical pressure model is a preset model for measuring the gas pressure parameters under an ideal state where the gas to be tested is not dissolved, and it characterizes the corresponding relationship between the electrolyte volume, the preset system volume parameters and the theoretical gas pressure parameters.

[0146] It is understood that the specific type of the preset theoretical pressure model is not unique. In one embodiment, the preset theoretical pressure model can be constructed according to the ideal gas state equation. In more detail, in one embodiment, p0*(V x -V E )=n*R*T, where p0 represents the theoretical air pressure parameter, V x Represents the preset system volume parameter, V E represents the volume of electrolyte, n represents the amount of gas-generating substance to be tested input into the electrolyte solubility test system, R represents the gas constant (8.31 J / (mol·K)), and T represents the test environment temperature.

[0147] It can be seen from the preset theoretical pressure model that when the test environment temperature is determined (which can be directly measured by a temperature detector), the preset system volume parameters are determined, and the electrolyte volume is determined, the preset theoretical pressure model can be substituted to calculate the theoretical air pressure parameters.

[0148] The above scheme uses a preset theoretical pressure model for analysis to determine the theoretical gas pressure parameters when the gas to be measured is not dissolved under the current electrolyte volume and preset system volume parameters, which has the advantages of simple analysis method and high efficiency.

[0149] In some embodiments, a method for determining a preset system volume parameter includes: controlling the first gas switch to be turned on to input a test gas; when the test gas input is completed, controlling the first gas switch to be turned off and obtaining an initial pressure parameter; when a volume increment meter is connected, controlling the first gas switch to be turned on; obtaining an actual pressure parameter and a gas increment of the volume increment meter; and determining the preset system volume parameter based on the initial pressure parameter, the actual pressure parameter and the gas increment.

[0150] Specifically, the solution of this embodiment, when determining the preset system volume parameter, combines the volume increment measuring device connected to the first end of the first gas switch to measure the volume change caused. First, the controller controls the first gas switch to conduct to input an appropriate amount of test gas, and when the test gas input is completed and the measurement of the air pressure detector is stable (that is, the fluctuation of the measured pressure data is less than the preset threshold), the pressure data of the air pressure detector is obtained as the initial pressure parameter.

[0151] Afterwards, when the volume increment measuring device is connected to the first end of the first gas switch, the first gas switch is controlled to be turned on. Due to the pressure difference between the volume increment measuring device and the gas line pipe and the liquid inlet pipe, the volume of the volume increment measuring device changes. The volume increment measuring device detects this change and outputs it to the controller. In addition, the controller also obtains the pressure data after the air pressure detector stabilizes again after the first gas switch is turned on, as the actual pressure parameter. Finally, the controller determines the preset system volume parameter based on the initial pressure parameter, the actual pressure parameter and the gas increment.

[0152] It is understood that the type of test gas is not unique. In a more detailed embodiment, the test gas includes air. The method for determining the preset system volume parameter is not unique. In other embodiments, the preset system volume parameter can also be measured by other methods such as the drainage method, which is not specifically limited.

[0153] In the above scheme, when the test gas is input and the volume increment measuring device is connected, the initial pressure parameters and the actual pressure parameters are obtained respectively, and the gas increment measured when the volume increment measuring device is connected is analyzed to finally determine the preset system volume parameters, which has a high accuracy in testing the preset system volume parameters.

[0154] In some embodiments, the preset system volume parameters are determined based on the initial pressure parameters, the actual pressure parameters and the gas increment, including: obtaining the total volume of the volume increment measuring device, the liquid inlet pipe and the gas path pipe; determining the preset system volume parameters based on the initial pressure parameters, the actual pressure parameters, the gas increment, the total volume and the preset ideal gas state model.

[0155] Specifically, the preset ideal gas state model can be expressed by pV=nRT, where: p is pressure (Pa), V is gas volume (m 3 ), T is temperature (K), n is the amount of gas (mol), and R is the gas constant (also called the universal gas constant mol.K). According to the different test stages of the electrolyte solubility test system, different state equations can be obtained according to the preset ideal gas state model.

[0156] First, when the first end of the first gas switch is not connected to the volume increment measuring device, the first gas switch is controlled to conduct the input test gas, and the initial pressure parameters are obtained. Combined with the preset ideal gas state model, the state equation can be constructed: P 10 *V x =n 10 *R*T, where P 10 is the initial pressure parameter, V x represents the system volume parameter, n 10 It represents the amount of substance in the test gas, R represents the gas constant, and T represents the test environment temperature.

[0157] Secondly, a volume increment measuring device is connected to the first end of the first gas switch. The total volume of the volume increment measuring device, the liquid inlet gas pipe and the gas path gas pipe can be measured by the drainage method, etc., which is recorded as V10. On this basis, combined with the preset ideal gas state model, the state equation can be constructed: P 11 *V 10 =n 11 *R*T, where P 11 V is the atmospheric pressure in the current environment, which can be measured by air pressure detection and other methods. 10 represents the total volume, n 11 It indicates the amount of substance in the mixed gas after the test gas and the gas inside the volume increment measuring device are mixed. R indicates the gas constant and T indicates the test environment temperature.

[0158] Furthermore, when the volume increment measuring device is connected and the first gas switch is turned on, the actual pressure parameter and the gas increment are obtained, and the state equation can be constructed in combination with the preset ideal gas state model: 12 *(V x +V 10 +ΔV 10 )=(n 11 +n 10 )*R*T. Among them, P 12 is the actual pressure parameter, V x Represents the system volume parameter, V 10 represents the total volume, ΔV 10 Indicates the gas increment, n 10 Indicates the amount of substance in the test gas, n 11 It represents the amount of substance in the mixed gas, R represents the gas constant, and T represents the test environment temperature.

[0159] In the three equations constructed above, there is an unknown quantity V x 、n 11 and n 10 , the remaining parameters can be measured, and finally the three equations are combined to solve them to obtain the system volume parameters and store them as the preset system volume parameters.

[0160] Using a method similar to the above, the volume of the gas path pipe, liquid inlet gas pipe and first sealed shell between the fourth gas switch and the liquid inlet gas path can be measured, recorded as Vb, and the corresponding volume is: the volume of the gas path pipe between the fourth gas switch and the first gas switch is Va=Vx-Vb.

[0161] The above scheme, combined with a preset ideal gas state model to determine the preset system volume parameters, has the advantages of simple analysis method and high efficiency.

[0162] See also Figure 8 In some embodiments, before step 501, the method further includes step 802, step 804 and step 806.

[0163] Step 802, control the sealed liquid injection assembly to open and inject electrolyte into the first sealed shell.

[0164] Step 804, when the electrolyte injection is completed and the sealed injection assembly is closed, a closed test is performed on the electrolyte solubility test system.

[0165] Step 806: When the airtightness test is successful, determine whether the test conditions are met.

[0166] Specifically, in actual testing scenarios, the sealed liquid injection assembly needs to be opened to inject electrolyte into the first sealed shell. This process will change the airtightness of the electrolyte solubility testing system. There is a risk of leakage in the electrolyte solubility testing system after the sealed liquid injection assembly is closed.

[0167] Therefore, in the scheme of this embodiment, after the electrolyte injection is completed and the sealed injection component is closed, it is necessary to perform a closed test on the electrolyte solubility test system, so that subsequent electrolyte solubility test operations can be carried out in a closed environment of the electrolyte solubility test system, thereby improving the test accuracy.

[0168] It should be noted that the electrolyte solubility test system is not the only way to perform a closed test. In a more detailed embodiment, the first gas switch may be controlled to be turned on, the test gas may be continuously input through the first end of the first gas switch, and the change of the pressure data collected by the gas pressure detector may be monitored. If the pressure data does not change, it means that the electrolyte solubility test system has a leak and the closed test has failed.

[0169] In the above scheme, before inputting the gas to be tested, the electrolyte solubility test system will be subjected to a closed test. If the closed test is successful, that is, the airtightness is good, the solubility test operation is performed to improve the accuracy of the solubility test.

[0170] In some embodiments, obtaining actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved includes: controlling the shaking of the first sealed shell with a preset time period as a period; when the fluctuation of the pressure data collected by the air pressure detector is less than a preset fluctuation threshold, using the pressure data as the actual air pressure parameter.

[0171] Specifically, the scheme of this embodiment, when the gas to be tested is input and the first gas switch is controlled to be cut off, the first sealed shell is controlled to shake with a preset time period as a cycle to promote the electrolyte to fully absorb the gas to be tested. In this process, the pressure data collected by the air pressure detector is obtained in real time, and the fluctuation of the pressure data (that is, the difference between the current pressure data and the last pressure data) is obtained, and compared with the preset fluctuation threshold. When the fluctuation is less than the preset fluctuation threshold, the pressure data is considered stable, and the pressure data at this time is used as the actual air pressure parameter.

[0172] It is understandable that the preset duration is not unique and can be set in combination with actual conditions. For example, in a more detailed embodiment, the preset duration can be set to 30 minutes.

[0173] In the above scheme, during the solubility test, it is necessary to shake the first sealed shell so that the gas to be tested can be fully absorbed. When the fluctuation of the pressure data collected by the air pressure detector is less than the preset fluctuation threshold, the pressure data is used as the actual air pressure parameter to improve the test accuracy of the actual air pressure parameter.

[0174] See also Fig. 9 In some embodiments, after step 505 , the method further includes step 902 .

[0175] Step 902, storing the solubility in correspondence with the current test environment temperature and the current test environment pressure, and obtaining the corresponding relationship between the test environment temperature, the test environment pressure and the solubility.

[0176] Specifically, in the solution of this embodiment, the controller will store the calculated solubility in correspondence with the current test environment temperature and test environment pressure. By changing the test environment temperature and / or the test environment pressure, different solubilities are tested, and finally all solubilities are stored in correspondence with the test environment temperature and the test environment pressure, and a corresponding relationship between the test environment temperature, the test environment pressure and the solubility is established.

[0177] The above scheme stores the solubility obtained from the actual test in correspondence with the test environment temperature and the test environment pressure, and can be directly called during the subsequent gas production analysis, thereby providing reliable data support for gas production monitoring and improving the reliability of gas production monitoring.

[0178] In order to facilitate understanding of the technical solution of the present application, the present application is explained below in conjunction with more detailed embodiments.

[0179] First, the first end of the first gas switch is not connected to the volume increment measuring device, and the controller controls the first gas switch to conduct the input test gas, obtains the initial pressure parameters, and establishes the state equation: P 10 *V x =n 10 *R*T; When the first end of the first gas switch is connected to the volume increment measuring device, the state equation is established: P 11 *V 10 =n 11 *R*T; When the volume increment measuring device is connected and the first gas switch is turned on, the state equation is established: P 12 *(V x +V 10 +ΔV 10 )=(n 11 +n 10 )*R*T. After that, the initial pressure parameter, actual pressure parameter, gas increment and total volume are combined to solve and obtain the preset system volume parameter V x and store.

[0180] Then start the test process. First, control the first gas switch, the second gas switch and the fourth gas switch to be turned on, control the third gas switch to be turned off, input test gas (which can be the test gas or air, etc.) into the system, detect the pressure data changes of the air pressure detector, and judge whether the system is airtight.

[0181] If the system airtightness test is successful, the second gas switch is controlled to be turned off, the first gas switch, the third gas switch and the fourth gas switch are turned on, and the gas extraction device is turned on to extract gas. If the pressure detector is detected to be a negative standard atmospheric pressure, the third gas switch is controlled to be turned off, the second gas switch is controlled to be turned on, and the gas to be tested (such as carbon dioxide) is input into the system until the pressure detector is a positive standard atmospheric pressure. This cycle is repeated many times, so that the electrolyte solubility test system is replaced by carbon dioxide. A certain amount of gas to be tested is input for the last time to end the gas extraction.

[0182] Then the controller controls the first gas switch, the second gas switch and the third gas switch to be turned off, and the fourth gas switch to be turned on. After about 30 minutes, the internal air pressure of the system is stable. At this time, the pressure is 0.057MPa, which is the theoretical air pressure parameter. Then inject 30mL of electrolyte (mass of about 35g), and shake the first sealed shell every 30 minutes to promote the absorption of the gas to be measured by the electrolyte. After the absorption is saturated, the internal air pressure of the system is stable. At this time, the pressure data measured by the air pressure detector is 0.147MPa, which is the actual air pressure parameter. According to the formula By calculation, the solubility of the electrolyte in the gas to be measured can be determined under the theoretical gas pressure parameter of 0.057MPa.

[0183] It can be understood that in another embodiment, the electrolyte may be injected into the first sealed housing before the gas to be measured is input. In this case, the electrolyte may be injected into the first sealed housing according to the formula P0*(V x -V E )=n*R*T to calculate and obtain the theoretical gas pressure parameters. When the gas to be measured is saturated, the actual gas pressure parameters are collected and obtained. According to the formula By performing calculations, the solubility of the electrolyte in the gas to be measured under the theoretical gas pressure parameters can also be determined.

[0184] After that, the gas to be tested can be increased by controlling the first gas switch and the second gas switch to be turned on and the fourth gas switch to be turned off to change the test environment pressure. Then the second gas switch is turned off and the fourth gas switch is turned on to calculate the solubility of the electrolyte in the gas to be tested after the test environment pressure changes. The final test results can be combined with reference to Fig.11 .

[0185] In another embodiment, the temperature of the adjustable heat bath container in which the first sealed housing is located can be changed to change the test environment temperature, and the solubility of the electrolyte in the gas to be tested at different test environment temperatures can be obtained by using a similar method as described above. The final test results can be combined with reference to Fig.12 .

[0186] Finally, the controller stores the solubility obtained from each test in correspondence with the test environment pressure and test environment temperature, and obtains the corresponding relationship between the test environment temperature, test environment pressure and solubility, providing data support for subsequent gas production monitoring of lithium batteries.

[0187] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0188] See also Fig.10 The present application also provides a gas production monitoring method, including step 1002, step 1004 and step 1006.

[0189] Step 1002, obtaining the ambient temperature and ambient pressure.

[0190] Step 1004, determining the actual solubility of the electrolyte to the gas production according to the ambient temperature, ambient pressure, and the corresponding relationship between the test ambient temperature, test ambient pressure and solubility.

[0191] Step 1006, determining the gas production according to the actual solubility.

[0192] Specifically, the scheme of this embodiment, combined with the ambient temperature and ambient pressure during gas production monitoring, and the corresponding relationship between the test ambient temperature, test ambient pressure and solubility, can know the solubility of the electrolyte to gas production in the current state. Combined with the actual volume and solubility of the electrolyte, the amount of gas produced by the electrolyte dissolution can be finally analyzed, and this part of the gas production can be added to the measured gas production to obtain the actual gas production of the lithium battery.

[0193] In the above scheme, when monitoring gas production, the solubility of the electrolyte to the gas to be measured under the current conditions is matched according to the current ambient temperature and ambient pressure, and then the gas production is analyzed in combination with the solubility, so as to obtain a more accurate gas production.

[0194] Based on the same inventive concept, the embodiment of the present application also provides an electrolyte solubility testing device for implementing the electrolyte solubility testing method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more electrolyte solubility testing device embodiments provided below can refer to the limitations of the electrolyte solubility testing method above, and will not be repeated here.

[0195] See also Fig.13 , an electrolyte solubility testing device, comprising: a gas production input module 131, a cutoff control module 132, a volume acquisition module 133, a gas pressure acquisition module 134 and a solubility determination module 135.

[0196] The gas production input module 131 is used to control the first gas switch to be turned on to input the gas to be tested when the test conditions are met; the cut-off control module 132 is used to control the first gas switch to be turned off when the input of the gas to be tested meets the target conditions; the volume acquisition module 133 is used to obtain the volume of the electrolyte injected into the first sealed shell; the air pressure acquisition module 134 is used to obtain the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved; the solubility determination module 135 is used to determine the solubility of the electrolyte in the gas to be tested based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume.

[0197] See also Fig.14 In some embodiments, the device further includes an ambient pressure regulating module 142 .

[0198] The environmental pressure regulating module 142 is used to control the fourth gas switch arranged in the gas circuit and the gas pipe to be cut off, and the first gas switch to be turned on, so as to increase the test environment pressure of the gas to be tested; when the increase of the gas to be tested is completed, the first gas switch is controlled to be cut off and the fourth gas switch is turned on; and the gas pressure acquisition module 134 is controlled to execute the operation of obtaining the theoretical gas pressure parameters when the gas to be tested is not dissolved, and the actual gas pressure parameters after the gas to be tested is dissolved.

[0199] See also Fig.15 In some embodiments, the device further includes an ambient temperature adjustment module 152 .

[0200] The ambient temperature adjustment module 152 is used to adjust the temperature of the adjustable heat bath container provided with the first sealed shell to adjust the test ambient temperature; and control the air pressure acquisition module 134 to execute the operation of acquiring the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved.

[0201] In some embodiments, the gas pressure acquisition module 134 is further used to analyze according to the electrolyte volume, preset system volume parameters, and a preset theoretical pressure model to determine the theoretical gas pressure parameters when the gas to be measured is not dissolved.

[0202] See also Fig.16 In some embodiments, the device also includes a closed detection module 162.

[0203] The sealing detection module 162 is used to control the opening of the sealed liquid injection component to inject electrolyte into the first sealed shell; when the electrolyte injection is completed and the sealed liquid injection component is closed, the electrolyte solubility test system is subjected to a sealing test; when the sealing test is successful, it is determined that the test conditions are met.

[0204] In some embodiments, the air pressure acquisition module 134 is also used to control the shaking of the first sealed shell with a preset time period; when the fluctuation of the pressure data collected by the air pressure detector is less than a preset fluctuation threshold, the pressure data is used as the actual air pressure parameter.

[0205] See also Fig.17 In some embodiments, the device also includes a storage module 172.

[0206] The storage module 172 is used to store the solubility in correspondence with the current test environment temperature and the current test environment pressure, and obtain the corresponding relationship between the test environment temperature, the test environment pressure and the solubility.

[0207] Each module in the above-mentioned electrolyte solubility test device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0208] The present application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the following method steps when executing the computer program:

[0209] When the test conditions are met, the first gas switch is controlled to be turned on to input the gas to be tested; when the input of the gas to be tested meets the target conditions, the first gas switch is controlled to be turned off; the volume of the electrolyte injected into the first sealed shell is obtained; the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved are obtained; the solubility of the electrolyte in the gas to be tested is determined based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume.

[0210] The present application also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the following method are implemented:

[0211] When the test conditions are met, the first gas switch is controlled to be turned on to input the gas to be tested; when the input of the gas to be tested meets the target conditions, the first gas switch is controlled to be turned off; the volume of the electrolyte injected into the first sealed shell is obtained; the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved are obtained; the solubility of the electrolyte in the gas to be tested is determined based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume.

[0212] The present application also provides a computer program product, including a computer program, which implements the steps of the following method when executed by a processor:

[0213] When the test conditions are met, the first gas switch is controlled to be turned on to input the gas to be tested; when the input of the gas to be tested meets the target conditions, the first gas switch is controlled to be turned off; the volume of the electrolyte injected into the first sealed shell is obtained; the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved are obtained; the solubility of the electrolyte in the gas to be tested is determined based on the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume.

[0214] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0215] The above-mentioned electrolyte solubility testing device, computer equipment, storage medium and computer program product can inject electrolyte into the first sealed shell through the sealed liquid injection component and the liquid inlet gas pipe. When the test conditions are met, the first gas switch is controlled by the controller to be turned on, so as to input the gas to be tested into the test system. When the input of the gas to be tested meets the target conditions, the controller controls the first gas switch to be turned off to complete the injection of the gas to be tested. After that, the controller waits for the electrolyte to dissolve the gas to be tested, obtains the volume of the injected electrolyte, and obtains the theoretical air pressure parameters when the gas to be tested is not dissolved, and the actual air pressure parameters after the gas to be tested is dissolved through the air pressure detector. Finally, the controller combines the theoretical air pressure parameters, the actual air pressure parameters and the electrolyte volume for analysis to determine the solubility of the electrolyte in the gas to be tested. In this way, the solubility of the electrolyte in the gas to be tested can be obtained, which provides data and theoretical support for the monitoring of the gas production by the redox decomposition of the electrolyte, can effectively alleviate the influence of the electrolyte absorption of gas production on the gas production monitoring, and improve the gas production monitoring accuracy of lithium-ion batteries.

[0216] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An electrolyte solubility testing system, characterized in that: include: Sealing and filling components; A first sealed housing, wherein a liquid inlet of the first sealed housing is connected to the sealed liquid injection assembly via a liquid inlet air pipe; a first gas switch, wherein a first end of the first gas switch is used to input the gas to be tested, and a second end of the first gas switch is connected to the liquid gas inlet pipe through a gas line gas pipe; An air pressure detector connected to the air pipe of the air circuit; A controller is connected to the first gas switch and the air pressure detector respectively.

2. The system according to claim 1, characterized in that It also includes a second gas switch, and the first end of the first gas switch inputs the gas to be measured through the second gas switch.

3. The system according to claim 2, characterized in that It also includes an air extraction device and a third gas switch, wherein a first end of the third gas switch is connected to a first end of the first gas switch, and a second end of the third gas switch is connected to the air extraction device.

4. The system according to claim 3, characterized in that It also includes a three-way valve, a first end of the three-way valve is connected to the first end of the first gas switch, a second end of the three-way valve is connected to the second gas switch, and a third end of the three-way valve is connected to the first end of the third gas switch.

5. The system according to any one of claims 2 to 4, characterized in that: It also includes a gas pressure measuring device, which is connected to the second end of the second gas switch, and the first end of the second gas switch is connected to the first end of the first gas switch.

6. The system according to any one of claims 1 to 4, characterized in that: It also includes a second sealed shell and a fourth gas switch, the air inlet of the second sealed shell is connected to the air path and air pipe, and the fourth gas switch is arranged on the air path and air pipe between the second sealed shell and the liquid air inlet pipe.

7. The system according to claim 6, characterized in that It also includes a four-way valve, a first end of the four-way valve is connected to the second end of the first gas switch, the second end of the four-way valve is connected to the air pressure detector, the third end of the four-way valve is connected to the fourth gas switch through the air path and air pipe, and the fourth end of the four-way valve is connected to the air inlet of the second sealed shell.

8. The system according to any one of claims 1 to 7, characterized in that: The device also includes a volume increment measuring device, wherein the volume increment measuring device is connected to the first end of the first gas switch.

9. The system according to any one of claims 1 to 7, characterized in that: It also includes an adjustable hot bath container, and the first sealed shell is arranged in the adjustable hot bath container.

10. An electrolyte solubility testing method based on the electrolyte solubility testing system according to any one of claims 1 to 9, characterized in that: include: When the test conditions are met, the first gas switch is controlled to be turned on to input the produced gas to be tested; When the gas output to be tested meets the target condition, controlling the first gas switch to be turned off; Obtaining the volume of electrolyte injected into the first sealed housing; Acquire theoretical air pressure parameters when the produced gas to be measured is not dissolved, and actual air pressure parameters collected by the air pressure detector after the produced gas to be measured is dissolved; The solubility of the electrolyte in the gas product to be measured is determined according to the theoretical gas pressure parameter, the actual gas pressure parameter and the volume of the electrolyte.

11. The method according to claim 10, characterized in that After obtaining the theoretical air pressure parameter when the produced gas to be measured is not dissolved, and the actual air pressure parameter collected by the air pressure detector after the produced gas to be measured is dissolved, the method further includes: Controlling the fourth gas switch disposed on the gas line gas pipe to be turned off, and the first gas switch to be turned on, so as to increase the pressure of the test environment for regulating the gas production to be tested; When the increase of the gas to be measured is completed, the first gas switch is controlled to be turned off, the fourth gas switch is turned on, and the process returns to the step of obtaining the theoretical gas pressure parameters when the gas to be measured is not dissolved, and the actual gas pressure parameters after the gas to be measured is dissolved.

12. The method according to claim 10 or 11, characterized in that: After obtaining the theoretical air pressure parameter when the produced gas to be measured is not dissolved, and the actual air pressure parameter collected by the air pressure detector after the produced gas to be measured is dissolved, the method further includes: The temperature of the adjustable heat bath container provided with the first sealed shell is adjusted to adjust the test environment temperature, and the step of returning to execute the step of obtaining the theoretical gas pressure parameters when the gas to be tested is not dissolved and the actual gas pressure parameters after the gas to be tested is dissolved is performed.

13. The method according to any one of claims 10 to 12, characterized in that: The step of obtaining the theoretical gas pressure parameter when the gas to be measured is not dissolved includes: The theoretical gas pressure parameters when the gas to be measured is not dissolved are determined by analyzing the electrolyte volume, the preset system volume parameters, and the preset theoretical pressure model.

14. The method according to claim 13, characterized in that The method for determining the preset system volume parameter includes: Controlling the first gas switch to be turned on to input a test gas; When the test gas input is completed, controlling the first gas switch to be turned off and obtaining initial pressure parameters; When the volume increment measuring device is connected, controlling the first gas switch to be turned on; Acquiring actual pressure parameters and gas increment of the volume increment measuring device; A preset system volume parameter is determined according to the initial pressure parameter, the actual pressure parameter and the gas increment.

15. The method according to claim 14, characterized in that The step of determining a preset system volume parameter according to the initial pressure parameter, the actual pressure parameter and the gas increment comprises: Obtaining the total volume of the volume increment measuring device, the liquid inlet air pipe and the air path air pipe; A preset system volume parameter is determined according to the initial pressure parameter, the actual pressure parameter, the gas increment, the total volume and a preset ideal gas state model.

16. The method according to any one of claims 10 to 15, characterized in that: Before the first gas switch is controlled to be turned on to input the gas to be tested when the test condition is met, the method further includes: Control the sealed liquid injection component to open and inject electrolyte into the first sealed housing; When the electrolyte injection is completed and the sealed liquid injection assembly is closed, performing a closed test on the electrolyte solubility test system; In case the sealing test is successful, it is determined that the test conditions are met.

17. The method according to any one of claims 10 to 15, characterized in that: Obtaining actual air pressure parameters collected by the air pressure detector after the gas to be tested is dissolved, including: Controlling the first sealed housing to shake with a preset time period; When the fluctuation of the pressure data collected by the air pressure detector is less than a preset fluctuation threshold, the pressure data is used as the actual air pressure parameter.

18. The method according to any one of claims 10 to 15, characterized in that: After determining the solubility of the electrolyte to the gas product to be measured according to the theoretical gas pressure parameter, the actual gas pressure parameter and the electrolyte volume, the method further includes: The solubility is stored in correspondence with the current test environment temperature and the current test environment pressure, and a corresponding relationship among the test environment temperature, the test environment pressure and the solubility is obtained.

19. A gas production monitoring method, characterized in that: include: Get the ambient temperature and ambient pressure; Determining the actual solubility of the electrolyte to the gas production according to the ambient temperature, the ambient pressure, and the corresponding relationship between the test ambient temperature, the test ambient pressure and the solubility; The gas production is determined based on the actual solubility.

20. An electrolyte solubility testing device, characterized in that: include: A gas production input module, used to control the first gas switch to be turned on to input the gas production to be tested when the test conditions are met; A cut-off control module, used for controlling the first gas switch to be cut off when the input of the gas to be tested meets the target condition; A volume acquisition module, used to acquire the volume of electrolyte injected into the first sealed housing; An air pressure acquisition module, used to acquire theoretical air pressure parameters when the produced gas to be measured is not dissolved, and actual air pressure parameters after the produced gas to be measured is dissolved; The solubility determination module is used to determine the solubility of the electrolyte to the gas product to be measured based on the theoretical gas pressure parameter, the actual gas pressure parameter and the electrolyte volume.

21. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 10 to 18 are implemented.

22. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 18 are implemented.

23. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 18 are implemented.

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