Airtightness detection system, method, device, equipment, storage medium and program product

Abstract

The invention relates to an airtightness detection system, method, device and equipment, a storage medium and a program product. And the upper computer obtains a target gas parameter of the battery in the test bin of which the gas pressure is not equal to the gas pressure in the calibration bin under the condition that the time length of the battery entering the test bin of which the gas parameter is located in the preset gas parameter interval from the calibration bin is greater than or equal to the preset time length, and determines the airtightness detection result of the battery according to the target gas parameter and the calibration gas parameter of the battery. According to the air tightness detection system provided by the embodiment of the invention, the air inflation stage and the pressure stabilization stage are not needed, but the test stage is directly executed, that is, the target air parameter of the battery in the test bin is directly obtained on the basis of the calibration air parameter and the condition that the duration of the battery entering the test bin is greater than or equal to the preset duration; therefore, the airtightness detection result of the battery can be determined, the complexity of the detection process is reduced, and the airtightness detection efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to an airtight detection system, method, device, equipment, storage medium and program product. Background Art

[0002] In order to control the defect rate of batteries and improve the ex-factory quality of batteries, airtight detection of batteries is a necessary step.

[0003] The current airtight detection includes four stages: inflation, pressure stabilization, testing, and exhaust. That is, first, the gas in the gas source is filled into the battery to be tested. After waiting for a period of time until the internal pressure of the battery to be tested is stable, the internal pressure of the battery to be tested is monitored by a sensor, and the difference between this pressure and the reference pressure is used as the airtight detection result. After the test is completed, the gas in the battery to be tested needs to be safely discharged through the exhaust stage.

[0004] However, the current airtight detection process is relatively complex, resulting in low airtight detection efficiency. Summary of the Invention

[0005] Based on this, in view of the above technical problems, it is necessary to provide an airtight detection system, method, device, equipment, storage medium and program product that can improve the airtight detection efficiency of batteries.

[0006] In a first aspect, this application provides an airtight detection system. The airtight detection system includes a host computer, a calibration chamber, and a test chamber, and the calibration chamber is connected to the test chamber;

[0007] The host computer is configured to, when the duration for the battery to enter the test chamber from the calibration chamber is greater than or equal to a preset duration, obtain the target gas parameters of the battery in the test chamber, and determine the airtight detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery.

[0008] Among them, the gas parameters in the test chamber are within a preset gas parameter range. The calibrated gas parameters are the gas parameters of the battery obtained when the gas parameters of the battery in the calibration chamber meet the calibration completion condition. The air pressure in the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber.

[0009] The airtight detection system provided in this embodiment obtains the target air parameters of the battery in the test chamber where the air pressure is not equal to the air pressure in the calibration chamber when the time for the battery to enter the test chamber with air parameters within a preset air parameter range from the calibration chamber is greater than or equal to a preset time, and determines the airtight detection result of the battery according to the target air parameters and the calibrated air parameters of the battery. Since the airtight detection system provided in this embodiment does not need to go through the inflation stage and the pressure stabilization stage, but directly executes the test stage, that is, directly based on the calibrated air parameters and the target air parameters of the battery in the test chamber obtained when the time for the battery to enter the test chamber is greater than or equal to the preset time, the airtight detection result of the battery can be determined, reducing the complexity of the detection process and thus improving the airtight detection efficiency.

[0010] In one embodiment, the airtight detection system further includes a temperature control component and a temperature sensor, and the temperature sensor is arranged between the temperature control component and the test chamber; the preset air parameter range includes a preset temperature range;

[0011] The upper computer is used to control the temperature control component to adjust the temperature of the test chamber to the preset temperature range when the temperature of the test chamber detected by the temperature sensor is outside the preset temperature range.

[0012] For the airtight detection system provided in this embodiment, when the temperature of the test chamber detected by the temperature sensor is outside the preset temperature range, the upper computer controls the temperature control component to adjust the temperature of the test chamber to the preset temperature range. Since the detection method of the traditional airtight detection system is easily affected by the ambient temperature, too high or too low ambient temperature will affect the accuracy of the airtight detection result. Therefore, in this embodiment, the temperature of the test chamber is maintained within the preset temperature range, reducing the possibility of too high or too low ambient temperature, thereby being able to reduce the influence degree of the ambient temperature on the airtight detection result and thus improving the accuracy of the airtight detection result.

[0013] In one embodiment, the airtight detection system further includes a pressure regulating component, and the pressure regulating component is connected to the test chamber; the preset air parameter range includes a preset air pressure range;

[0014] The upper computer is used to obtain the input pressure mode of the test chamber and control the pressure regulating component to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode.

[0015] For the airtight detection system provided in this embodiment, the upper computer controls the pressure regulating component to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the input pressure mode, which can realize adjusting the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode according to the requirements, and further realize the airtight test of the battery in the selected pressure mode.

[0016] In one embodiment, the airtight detection system further includes an air source. The pressure regulating assembly includes a pressure regulating valve, and the pressure regulating valve is respectively connected to the air source and the test chamber;

[0017] The host computer is configured to, when the pressure mode is the positive pressure mode, control the pressure regulating valve to adjust the air pressure of the gas provided by the air source to the preset air pressure range corresponding to the positive pressure mode, and convey the gas with adjusted air pressure to the test chamber, so as to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the positive pressure mode.

[0018] The airtight detection system provided by this embodiment, when the pressure mode is the positive pressure mode, controls the pressure regulating valve to adjust the air pressure of the gas provided by the air source to the preset air pressure range corresponding to the positive pressure mode, and conveys the gas with adjusted air pressure to the test chamber, so as to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the positive pressure mode, thereby providing a prerequisite for performing an airtight test on the battery in the test chamber in the positive pressure mode.

[0019] In one embodiment, the airtight detection system further includes a voltage stabilizing assembly, and the voltage stabilizing assembly is arranged between the air source and the pressure regulating valve;

[0020] The host computer is configured to control the voltage stabilizing assembly to stabilize the air pressure of the gas provided by the air source, and control the pressure regulating valve to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode.

[0021] For the airtight detection system provided by this embodiment, the host computer controls the voltage stabilizing assembly to stabilize the air pressure of the gas provided by the air source, and controls the pressure regulating valve to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode. Since the pressure regulating valve is controlled to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode, the stability of the air pressure of the gas conveyed by the pressure regulating valve to the test chamber is higher, the influence degree of the unstable air pressure of the gas in the test chamber on the airtight detection result is reduced, and the accuracy of the obtained airtight detection result is improved.

[0022] In one embodiment, the pressure regulating assembly includes a pressure regulating valve and an air extraction device, and the pressure regulating valve is connected to the air extraction device;

[0023] The host computer is configured to, when the pressure mode is the negative pressure mode, adjust the air pressure of the pressure regulating valve, and when the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, control the air extraction device to perform a vacuum pumping process on the test chamber, so as to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the negative pressure mode.

[0024] In the airtight detection system provided in this embodiment, when the pressure mode of the host computer is the negative pressure mode, the air pressure of the pressure regulating valve is adjusted. When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, the air extraction device is controlled to evacuate the test chamber, so as to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the negative pressure mode, thereby providing a prerequisite for the airtight test of the battery in the test chamber in the positive pressure mode.

[0025] In one embodiment, the calibrated gas parameters include calibrated air pressure and calibrated air temperature, and the target gas parameters include target air pressure and target air temperature.

[0026] The host computer is used to determine the absolute value of the difference between the calibrated air temperature and the target air temperature.

[0027] The host computer is used to, when the absolute value is greater than or equal to the preset temperature difference, determine the leakage compensation amount according to the absolute value, and determine the airtight detection result of the battery based on the leakage compensation amount and the air pressure difference between the target air pressure and the calibrated air pressure; when the absolute value is less than the preset temperature difference, determine the airtight detection result of the battery based on the air pressure difference between the target air pressure and the calibrated air pressure.

[0028] In the airtight detection system provided in this embodiment, when the absolute value of the difference between the calibrated air temperature and the target air temperature is greater than or equal to the preset temperature difference, the leakage compensation amount is determined according to the absolute value, and the airtight detection result of the battery is determined based on the leakage compensation amount and the air pressure difference between the target air pressure and the calibrated air pressure, thereby reducing the influence of temperature on the airtight detection result and improving the accuracy of the obtained airtight detection result.

[0029] In a second aspect, the present application also provides an airtight detection device. The device is arranged in the host computer in any of the above airtight detection systems, and the device includes:

[0030] An acquisition module, configured to acquire the target gas parameters of the battery in the test chamber when the duration of the battery entering the test chamber in the airtight detection system from the calibration chamber in the airtight detection system is greater than or equal to the preset duration; the gas parameters in the test chamber are within the preset gas parameter range, and the air pressure in the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber.

[0031] A determination module, configured to determine the airtight detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery; the calibrated gas parameters are the gas parameters of the battery obtained when the gas parameters of the battery in the calibration chamber meet the calibration completion condition.

[0032] In a third aspect, the present application also provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of any of the above airtight detection methods are implemented.

[0033] Fourthly, the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above airtightness detection methods are implemented.

[0034] Fifthly, the present application also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of any of the above airtightness detection methods are implemented.

[0035] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. Description of the Drawings

[0036] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0037] Figure 1 is a schematic structural diagram of an airtightness detection system provided by an embodiment of the present application;

[0038] Figure 2 is a schematic structural diagram of an airtightness detection system provided by an embodiment of the present application;

[0039] Figure 3 is a schematic flowchart of an airtightness detection method provided by an embodiment of the present application;

[0040] Figure 4 is a schematic overall flowchart of an airtightness detection method provided by an embodiment of the present application;

[0041] Figure 5 is a schematic structural diagram of an airtightness detection device provided by an embodiment of the present application;

[0042] Figure 6 is an internal structure diagram of a computer device in an embodiment. Detailed Embodiments

[0043] The following will describe in detail the embodiments of the technical solution of the present application with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0045] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0046] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase does not necessarily refer to the same embodiment at every occurrence in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0047] In the description of the embodiments of this application, the term "and / or" is merely a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0048] In the description of the embodiments of this application, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0049] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0051] In order to control the defect rate of the battery and improve the ex-factory quality of the battery, airtightness detection of the battery is a necessary step.

[0052] The current airtightness detection includes four stages: inflation, pressure stabilization, testing, and exhaust. That is, in the inflation stage, the gas in the gas source is first filled into the battery to be tested; in the pressure stabilization stage, it is necessary to wait for a period of time until the internal pressure of the battery to be tested is stable. After the pressure stabilization stage, it enters the testing stage. The pressure inside the battery to be tested is monitored by a sensor, and the difference between this pressure and the reference pressure is used as the airtightness detection result; after the testing is completed, it enters the exhaust stage, that is, after the testing is completed, the gas inside the battery to be tested needs to be safely discharged through the exhaust stage.

[0053] However, the current airtightness detection process is relatively complex, resulting in low airtightness detection efficiency.

[0054] To solve the above technical problems, the embodiments of the present application provide an airtightness detection system, as Figure 1 shown, Figure 1 is a schematic structural diagram of an airtightness detection system provided by the embodiments of the present application. The airtightness detection system includes a host computer, a calibration chamber, and a test chamber, and the calibration chamber is connected to the test chamber;

[0055] The host computer is configured to obtain the target gas parameters of the battery in the test chamber when the time for the battery to enter the test chamber from the calibration chamber is greater than or equal to a preset time, and determine the airtightness detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery;

[0056] Among them, the gas parameters in the test chamber are within a preset gas parameter range. The calibrated gas parameters are the gas parameters of the battery obtained when the gas parameters of the battery in the calibration chamber meet the calibration completion condition, and the air pressure in the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber.

[0057] The battery in this embodiment is a battery that has been sealed, that is, the positions that can be connected to the connecting components can be sealed, such as the coolant inlet and outlet, electrical interfaces, etc. Each battery can be sealed at the feeding position A. When the first automatic sealing door K1 is opened, the sealed battery can enter the calibration bin through the first automatic sealing door K1. Among them, multiple batteries can be sealed in parallel at the feeding position A, and the specific quantity can be determined according to actual requirements. The calibration bin can be connected to the test bin through the second automatic sealing door K2. When the second automatic sealing door K2 is opened, the battery in the calibration bin can enter the test bin. When the gas parameters of the battery in the calibration bin meet the calibration completion conditions, the battery in the calibration bin can enter the test bin. The upper computer can control the Automated Guided Vehicle (AGV) to transport the battery from the calibration bin to the test bin. Among them, the AGV is a transportation device that realizes driverless through navigation technologies such as electromagnetic and laser and can automatically drive on the set path.

[0058] The target gas parameters of the battery can include the air pressure of the battery. Or, the target gas parameters of the battery can include the target air pressure and target temperature of the battery. When the target gas parameters include the air pressure of the battery, the calibrated gas parameters of the battery can include the calibrated air pressure of the battery. When the target gas parameters include the target air pressure and target temperature of the battery, the calibrated gas parameters of the battery can include the calibrated air pressure and calibrated temperature of the battery.

[0059] After the battery enters the calibration bin, the second automatic sealing door K2 and the third automatic sealing door K3 can be closed. The Battery Management System (BMS) of the battery in the calibration bin automatically reads the temperature and air pressure of the battery in real time and transmits the temperature and air pressure of the battery read in real time to the upper computer in real time. The BMS can transmit the temperature and air pressure of the battery read in real time to the upper computer through a Controller Area Network (CAN) box. The CAN box is a communication interface device based on CAN bus technology. Or, the BMS is directly connected to the USB port of the upper computer through a USB interface chip, so as to realize transmitting the temperature and air pressure of the battery read by the BMS in real time to the upper computer through the USB interface chip.

[0060] In a possible implementation manner, the upper computer can determine that the gas parameters of the battery meet the calibration completion conditions when the duration of the battery entering the calibration bin reaches a preset value, and use the gas parameters of the battery under the condition of meeting the calibration completion conditions as the calibrated gas parameters. That is, when the duration of the battery entering the calibration bin reaches a preset value, the upper computer can receive the air pressure of the battery sent by the BMS as the calibrated air pressure and receive the temperature of the battery sent by the BMS as the calibrated temperature.

[0061] In another possible implementation, the host computer can compare two adjacent air pressures sent by the BMS to obtain an air pressure comparison result, and compare two adjacent air temperatures sent by the BMS to obtain an air temperature comparison result; when the absolute value of the air pressure change amount in the air pressure comparison result is less than the preset air pressure change amount and the absolute value of the air temperature change amount in the air temperature comparison result is less than the preset air temperature change amount, it is determined that the air parameters of the battery meet the calibration completion condition, and the air parameters of the battery under the condition of meeting the calibration completion condition are used as the calibrated air parameters.

[0062] In this embodiment, the preset air parameter range can include a preset air pressure range, or the preset air parameter range can include a preset air pressure range and a preset temperature range. When the air temperature of the test chamber detected by the temperature sensor is outside the preset temperature range, the host computer can control the temperature control component to adjust the air temperature of the test chamber to the preset temperature range.

[0063] The host computer can obtain the input pressure mode of the test chamber and control the pressure regulating component to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode.

[0064] Among them, determining the airtightness detection result of the battery according to the target air parameters and the calibrated air parameters of the battery can be achieved in the following ways:

[0065] In one possible implementation, when the target air parameters include the target air pressure of the battery and the calibrated air parameters of the battery include the calibrated air pressure of the battery, the air pressure difference between the target air pressure and the calibrated air pressure is determined, and based on the air pressure difference between the target air pressure and the calibrated air pressure, the airtightness detection result of the battery is determined.

[0066] In another possible implementation, when the target air parameters include the target air pressure and target air temperature of the battery and the calibrated air parameters of the battery include the calibrated air pressure and calibrated air temperature of the battery, the absolute value of the air temperature difference between the calibrated air temperature and the target air temperature can be determined. When the absolute value is greater than or equal to the preset air temperature difference, the leakage compensation amount is determined according to the absolute value, and based on the leakage compensation amount and the air pressure difference between the target air pressure and the calibrated air pressure, the airtightness detection result of the battery is determined; when the absolute value is less than the preset air temperature difference, the airtightness detection result of the battery is determined based on the air pressure difference between the target air pressure and the calibrated air pressure.

[0067] Among them, determining the airtightness detection result of the battery based on the air pressure difference between the target air pressure and the calibrated air pressure can include: if the absolute value of the air pressure difference is greater than or equal to the preset air pressure difference, it is determined that the airtightness detection result is that the battery has a leak; if the absolute value of the air pressure difference is less than the preset air pressure difference, it is determined that the airtightness detection result is that the battery has no leak.

[0068] Based on the leakage compensation amount and the air pressure difference between the target air pressure and the calibrated air pressure, determining the airtightness detection result of the battery may include: determining the target air pressure difference based on the leakage compensation amount and the air pressure difference. If the absolute value of the target air pressure difference is greater than or equal to the preset air pressure difference, it is determined that the airtightness detection result is that the battery has a leak; if the absolute value of the target air pressure difference is less than the preset air pressure difference, it is determined that the airtightness detection result is that the battery has no leak.

[0069] In this embodiment, the battery that has undergone the airtightness detection can enter the discharge port D through the third automatic sealing door K3. The blocking tooling can be removed and the power can be removed from the qualified products; the leakage point can be found for the unqualified products. Among them, the qualified products include the batteries without leaks, and the unqualified products include the batteries with leaks.

[0070] After the battery enters the discharge port D through the third automatic sealing door K3, the third automatic sealing door K3 can be closed, and the air pressure in the test chamber is maintained within the preset air pressure range corresponding to the pressure mode, and the airtightness test of the battery in the test chamber can be continued.

[0071] It should be noted that the number of batteries in the test chamber can be multiple, so as to enable batch detection of multiple batteries at the same time, save the detection cost, and improve the detection efficiency.

[0072] For the airtightness detection system provided in this embodiment, when the time for the battery to enter the test chamber with air parameters within the preset air parameter range from the calibration chamber is greater than or equal to the preset time, the target air parameters of the battery in the test chamber with air pressure not equal to the air pressure in the calibration chamber are obtained. According to the target air parameters and the calibrated air parameters of the battery, the airtightness detection result of the battery is determined. Since the airtightness detection system provided in this embodiment does not need to go through the inflation stage and the pressure stabilization stage, but directly executes the test stage, that is, directly based on the calibrated air parameters and the target air parameters of the battery in the test chamber obtained when the time for the battery to enter the test chamber is greater than or equal to the preset time, the airtightness detection result of the battery can be determined, reducing the complexity of the detection process, thereby improving the airtightness detection efficiency.

[0073] In one embodiment, as Figure 2 shown, Figure 2 FIG. is a schematic structural diagram of an airtightness detection system provided by an embodiment of the present application. The airtightness detection system further includes a temperature control component H and a temperature sensor N. The temperature sensor N is arranged between the temperature control component H and the test chamber C; the preset air parameter range includes a preset temperature range;

[0074] The upper computer is configured to control the temperature control component H to adjust the temperature of the test chamber C to the preset temperature range when the temperature of the test chamber C detected by the temperature sensor N is outside the preset temperature range.

[0075] Among them, the preset temperature range is generally from 18 degrees Celsius (°C) to 28 °C. When the temperature of the test chamber C detected by the temperature sensor N is lower than 18 °C, the host computer can control the temperature control component H to heat the gas in the test chamber C to increase the temperature of the test chamber C. When the temperature of the test chamber C detected by the temperature sensor N is higher than 28 °C, the host computer can control the temperature control component H to cool the gas in the test chamber C to lower the temperature of the test chamber C, so as to adjust the temperature of the test chamber C to the preset temperature range.

[0076] For the airtight detection system provided in this embodiment, when the temperature of the test chamber detected by the temperature sensor is outside the preset temperature range, the host computer controls the temperature control component to adjust the temperature of the test chamber to the preset temperature range. Since the detection method of the traditional airtight detection system is easily affected by the ambient temperature, too high or too low ambient temperature will affect the accuracy of the airtight detection result. Therefore, in this embodiment, the temperature of the test chamber is maintained within the preset temperature range, reducing the possibility of too high or too low ambient temperature, thereby being able to reduce the influence degree of the ambient temperature on the airtight detection result, and thus improving the accuracy of the airtight detection result.

[0077] In one embodiment, as Figure 2 shown, the airtight detection system further includes a pressure regulating component, and the pressure regulating component is connected to the test chamber C; the preset gas parameter range includes a preset pressure range;

[0078] The host computer is used to obtain the input pressure mode of the test chamber C and control the pressure regulating component to adjust the air pressure in the test chamber C to the preset pressure range corresponding to the pressure mode.

[0079] In this embodiment, the user can select the pressure mode with one key. The pressure mode includes a positive pressure mode or a negative pressure mode. The user can select the pressure mode based on the actual application scenario of the battery. For example, if the application scenario of the battery is a positive pressure scenario, the positive pressure mode can be selected. When the pressure mode is the positive pressure mode, the pressure regulating component can be controlled to adjust the air pressure in the test chamber C to the preset pressure range corresponding to the positive pressure mode. Among them, the air pressure in the preset pressure range corresponding to the positive pressure mode is greater than the air pressure in the calibration chamber. The pressure sensor I can detect the air pressure in the test chamber and send the detected air pressure to the host computer. The host computer can determine whether the air pressure in the test chamber C is within the preset pressure range corresponding to the positive pressure mode according to the air pressure detected by the pressure sensor I.

[0080] When the pressure mode is the negative pressure mode, the pressure regulating component can be controlled to adjust the air pressure in the test chamber C to the preset pressure range corresponding to the negative pressure mode. Among them, the air pressure in the preset pressure range corresponding to the negative pressure mode is less than the air pressure in the calibration chamber. The host computer can determine whether the air pressure in the test chamber C is within the preset pressure range corresponding to the negative pressure mode according to the air pressure detected by the pressure sensor I.

[0081] In the airtight detection system provided in this embodiment, the host computer controls the pressure regulating component to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the input pressure mode, so as to realize adjusting the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode as required, and then realize the airtight test of the battery in the selected pressure mode.

[0082] In one embodiment, as Figure 2 shown, when the pressure mode is the positive pressure mode, the airtight detection system may further include a gas source O, and the pressure regulating component includes a pressure regulating valve Q. The pressure regulating valve Q is respectively connected to the gas source and the test chamber C;

[0083] The host computer is used to control the pressure regulating valve Q to adjust the air pressure of the gas provided by the gas source O to the preset air pressure range corresponding to the positive pressure mode when the pressure mode is the positive pressure mode, and deliver the gas with adjusted air pressure to the test chamber C to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the positive pressure mode.

[0084] In this embodiment, the host computer can control the pressure regulating valve Q to be adjusted to the preset air pressure range corresponding to the positive pressure mode, so as to realize controlling the pressure regulating valve Q to adjust the air pressure of the gas provided by the gas source O to the preset air pressure range corresponding to the positive pressure mode. The adjusted gas can be delivered to the test chamber C through the first pneumatic control valve J1 when the first pneumatic control valve J1 is opened, so as to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the positive pressure mode. Among them, for example, the preset air pressure range corresponding to the positive pressure mode can be determined based on the preset positive pressure. If the preset positive pressure is 3 kPa, the upper limit value of the preset air pressure range can be 3.1 kPa, and the lower limit value of the preset air pressure range can be 2.9 kPa. That is, if it is desired that the air pressure in the test chamber reaches the preset pressure of 3 kPa, the preset air pressure range can be from 2.9 kPa to 3.1 kPa. The preset positive pressure here is the relative pressure. The absolute pressure = atmospheric pressure + relative pressure. When the relative pressure is negative, it represents the vacuum degree. For example: when the atmospheric pressure is 101 kPa and the relative pressure is 3 kPa, the corresponding absolute pressure is 104 kPa; when the relative pressure is -3 kPa, the corresponding absolute pressure is 98 kPa.

[0085] The airtight detection system provided in this embodiment, when the pressure mode is the positive pressure mode, controls the pressure regulating valve to adjust the air pressure of the gas provided by the gas source to the preset air pressure range corresponding to the positive pressure mode, and delivers the gas with adjusted air pressure to the test chamber to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the positive pressure mode, thereby providing a prerequisite for the airtight test of the battery in the test chamber in the positive pressure mode.

[0086] In one embodiment, as Figure 2 shown, the airtight detection system further includes a voltage stabilizing component, and the voltage stabilizing component is arranged between the gas source O and the pressure regulating valve Q;

[0087] The host computer is used to control the pressure stabilizer component to stabilize the air pressure of the gas provided by the gas source, and control the pressure regulating valve Q to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode.

[0088] Among them, in a possible implementation manner, the pressure stabilizer component may include a pressure stabilizer tank P. After the gas source O enters the pressure stabilizer tank P, the pressure stabilizer tank P can stabilize the gas source O, and the gas after being stabilized by the pressure stabilizer tank P is then adjusted to the preset air pressure range corresponding to the positive pressure mode through the pressure regulating valve Q.

[0089] In another possible implementation manner, the pressure stabilizer component may include a pressure stabilizer tank P and a pneumatic triple unit S1. The pneumatic triple unit S1 is connected to the gas source O and the pressure stabilizer tank P. The pneumatic triple unit S1 can filter the gas provided by the gas source to filter out impurities in the gas, send the filtered gas into the pressure stabilizer tank P for pressure stabilization, and the gas after being stabilized by the pressure stabilizer tank P is then adjusted to the preset air pressure range corresponding to the positive pressure mode through the pressure regulating valve Q. After being filtered by the pneumatic triple unit S1, the cleanliness of the gas delivered to the pressure stabilizer tank P can be improved, the probability of impurities entering the pressure regulating valve can be reduced, thereby reducing the impact on the service life of the pressure regulating valve, and enabling the airtight detection system to operate more safely, efficiently and stably.

[0090] For the airtight detection system provided in this embodiment, the host computer controls the pressure stabilizer component to stabilize the air pressure of the gas provided by the gas source, and controls the pressure regulating valve to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode. Since the pressure regulating valve is controlled to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode, the stability of the air pressure of the gas delivered by the pressure regulating valve to the test chamber is higher, the influence degree of the unstable air pressure of the gas in the test chamber on the airtight detection result is reduced, and the accuracy of the obtained airtight detection result is improved.

[0091] In one embodiment, as Figure 2 shown, when the pressure mode is the negative pressure mode, the pressure regulating component may include a pressure regulating valve Q and an air extraction device G, and the pressure regulating valve Q is connected to the air extraction device G;

[0092] The host computer is used to adjust the air pressure of the pressure regulating valve Q when the pressure mode is the negative pressure mode, and when the air pressure of the pressure regulating valve Q is within the preset air pressure range corresponding to the negative pressure mode, control the air extraction device G to perform a vacuum pumping process on the test chamber C to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the negative pressure mode.

[0093] In the case where the pressure mode is the negative pressure mode, it is necessary to close the first pneumatic control valve J1, open the second pneumatic control valve J2, adjust the air pressure of the pressure regulating valve Q to the preset air pressure range corresponding to the negative pressure mode. When the air pressure of the pressure regulating valve Q is within the preset air pressure range corresponding to the negative pressure mode, control the air extraction device G to evacuate the test chamber C to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the negative pressure mode.

[0094] For example, the preset air pressure range corresponding to the negative pressure mode can be determined based on a preset negative pressure. If the preset negative pressure is -3 kPa, the upper limit value of the preset air pressure range can be from -3.1 kPa to -2.9 kPa. That is, if it is desired that the air pressure in the test chamber reaches -3 kPa, the preset air pressure range can be from -3.1 kPa to -2.9 kPa. The preset negative pressure here is the relative pressure.

[0095] Among them, the vacuum sensor M can detect the pressure of the test chamber C in real time. The host computer can judge whether the pressure of the test chamber reaches the preset air pressure range corresponding to the negative pressure mode according to the pressure of the test chamber C detected by the vacuum sensor M.

[0096] For the airtight detection system provided in this embodiment, when the pressure mode of the host computer is the negative pressure mode, it adjusts the air pressure of the pressure regulating valve. When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, it controls the air extraction device to evacuate the test chamber to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the negative pressure mode, thereby providing a prerequisite for the airtight test of the battery in the test chamber in the positive pressure mode.

[0097] In one embodiment, the calibrated gas parameters include calibrated air pressure and calibrated air temperature, and the target gas parameters include target air pressure and target air temperature;

[0098] The host computer is used to determine the absolute value of the difference between the calibrated air temperature and the target air temperature;

[0099] The host computer is used to, when the absolute value is greater than or equal to the preset temperature difference, determine the leakage compensation amount according to the absolute value, and determine the airtight detection result of the battery based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air pressure; when the absolute value is less than the preset temperature difference, determine the airtight detection result of the battery based on the pressure difference between the target air pressure and the calibrated air pressure.

[0100] In this embodiment, the BMS of the battery can detect the temperature and air pressure of the battery in real time, and send the temperature and air pressure of the battery detected in real time to the host computer through the CAN box E. The host computer can use the temperature of the battery received when the time for the battery to enter the test chamber from the calibration chamber is greater than or equal to the preset time as the target temperature, and use the air pressure of the battery received in this case as the target air pressure, that is, the host computer obtains the target air parameters of the battery in the test chamber. Among them, this embodiment supports the parallel connection of multiple-channel CAN boxes or the layout of multiple CAN box communication interface devices, and the number of CAN box communication interface devices can be flexibly configured according to the actual number of batteries to be detected.

[0101] If the calibrated temperature is represented by T0, the calibrated air pressure is represented by P0, the target temperature is represented by T1, and the target air pressure is represented by P1, the absolute value of the temperature difference between the calibrated temperature and the target temperature can be determined. When the absolute value is greater than or equal to the preset temperature difference, it means that the temperature difference is too large, causing pressure fluctuations and affecting the airtightness detection result. Therefore, in order to improve the accuracy of the airtightness detection result, in this case, this embodiment calculates the leakage compensation amount and performs compensation based on the leakage compensation amount, thereby improving the accuracy of the obtained airtightness detection result.

[0102] That is > When the preset temperature difference is exceeded, calculate the leakage compensation amount. The compensation logic is: leakage compensation amount = α × + β, where α is the first compensation coefficient and β is the second compensation coefficient. When the leakage compensation amount is obtained, the target air pressure difference can be determined based on the leakage compensation amount and the air pressure difference, and the airtightness detection result of the battery can be determined based on the target air pressure difference.

[0103] Exemplarily, when T1 is greater than T0 and is greater than the preset temperature difference, the leakage compensation amount can be calculated based on this leakage compensation amount calculation formula, and the result obtained by subtracting the leakage compensation amount from the air pressure difference between the target air pressure and the calibrated air pressure is used as the target air pressure difference. If the target air pressure difference is greater than or equal to the preset air pressure difference, it can be determined that the airtightness detection result is leakage and the battery is a non-conforming product. If the target air pressure difference is less than the preset air pressure difference, it can be determined that the airtightness detection result is no leakage and the battery is a qualified product. When the battery has a leak, it means that the battery has a risk of air leakage, or if the battery is used in a water-related environment, water may enter the battery from the leak point, affecting the battery life. Therefore, in this case, the leak point can be reworked and located.

[0104] In the airtightness detection system provided in this embodiment, when the absolute value of the temperature difference between the calibrated temperature and the target temperature is greater than or equal to the preset temperature difference, the leakage compensation amount is determined according to the absolute value, and based on the leakage compensation amount and the pressure difference between the target pressure and the calibrated pressure, the airtightness detection result of the battery is determined, thereby reducing the influence of temperature on the airtightness detection result and improving the accuracy of the obtained airtightness detection result.

[0105] In one embodiment, the host computer can send the obtained calibrated gas parameters and target gas parameters to the temperature compensation device T, and the temperature compensation device T determines the absolute value of the temperature difference between the calibrated temperature in the calibrated gas parameters and the target temperature in the target gas parameters; when the absolute value is greater than or equal to the preset temperature difference, the leakage compensation amount is determined according to the absolute value, and based on the leakage compensation amount and the pressure difference between the target pressure and the calibrated pressure, the airtightness detection result of the battery is determined; when the absolute value is less than the preset temperature difference, the airtightness detection result of the battery is determined based on the pressure difference between the target pressure and the calibrated pressure.

[0106] The temperature compensation device T can send the determined airtightness detection result to the host computer, so that the host computer determines whether the product is qualified based on the airtightness detection result.

[0107] The process of the temperature compensation device T determining the airtightness detection result is as follows: the target pressure difference can be determined based on the leakage compensation amount and the pressure difference between the target pressure and the calibrated pressure. When the absolute value of the target pressure difference is greater than or equal to the preset pressure difference, it is considered that the battery has a leak, and the airtightness detection result is determined that the battery is a non-conforming product and can be reworked to find the leak. When the absolute value of the target pressure difference is less than the preset pressure difference, the airtightness detection result is determined that the battery is a qualified product, and subsequently, the tooling required for plugging can be removed and the power-off operation can be performed.

[0108] When the absolute value of the temperature difference is less than the preset temperature difference, it is directly determined whether the target pressure difference is greater than or equal to the preset pressure difference. The determination process is the same as the above determination process under temperature compensation, that is, when the absolute value of the target pressure difference is greater than or equal to the preset pressure difference, it is considered that the battery has a leak, and the airtightness detection result is determined that the battery is a non-conforming product and can be reworked to find the leak. When the absolute value of the target pressure difference is less than the preset pressure difference, the airtightness detection result is determined that the battery is a qualified product, and subsequently, the tooling required for plugging can be removed and the power-off operation can be performed. It should be noted that in this case, the target pressure difference is equal to the pressure difference between the target pressure and the calibrated pressure, that is, the target pressure difference is equal to P1 - P0.

[0109] As Figure 3 shown, the embodiment of the present application also provides an airtightness detection method, and the airtightness detection method is applied to the host computer in the airtightness detection system in any of the above embodiments. Figure 3It is a schematic flowchart of an airtight detection method provided by an embodiment of the present application. The method may include the following steps:

[0110] S301, when the duration for the battery to enter the test chamber in the airtight detection system from the calibration chamber is greater than or equal to a preset duration, obtain the target gas parameters of the battery in the test chamber; the gas parameters in the test chamber are within a preset gas parameter range, and the air pressure among the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber;

[0111] S302, determine the airtight detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery; the calibrated gas parameters are the gas parameters of the battery obtained when the gas parameters of the battery in the calibration chamber meet the calibration completion condition.

[0112] The preset gas parameter range includes a preset temperature range. The method further includes:

[0113] When the temperature of the test chamber detected by the temperature sensor in the airtight detection system is outside the preset temperature range, control the temperature control component in the airtight detection system to adjust the temperature of the test chamber to the preset temperature range.

[0114] In one embodiment, the preset gas parameter range includes a preset air pressure range. The method further includes:

[0115] Obtain the input pressure mode of the test chamber;

[0116] Control the pressure regulating component in the airtight detection system to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode.

[0117] In one embodiment, controlling the pressure regulating component in the airtight detection system to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode includes:

[0118] When the pressure mode is the positive pressure mode, control the pressure regulating valve in the pressure regulating component to adjust the air pressure of the gas provided by the gas source in the airtight detection system to the preset air pressure range corresponding to the positive pressure mode;

[0119] Transport the gas with the air pressure adjusted to the preset air pressure range corresponding to the positive pressure mode to the test chamber to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the positive pressure mode.

[0120] In one embodiment, controlling the pressure regulating valve in the pressure regulating component to adjust the air pressure of the gas provided by the gas source in the airtight detection system to the preset air pressure range corresponding to the positive pressure mode includes:

[0121] Control the pressure stabilizing component in the airtight detection system to stabilize the air pressure of the gas provided by the gas source;

[0122] The control pressure regulating valve adjusts the air pressure of the gas after voltage stabilization to the preset air pressure range corresponding to the positive pressure mode.

[0123] In one embodiment, adjusting the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode by the pressure regulating component in the airtight detection system includes:

[0124] When the pressure mode is the negative pressure mode, adjusting the air pressure of the pressure regulating valve in the pressure regulating component;

[0125] When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, controlling the air extraction device in the pressure regulating component to evacuate the test chamber, so as to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the negative pressure mode.

[0126] In one embodiment, the calibrated gas parameters include calibrated air pressure and calibrated air temperature, and the target gas parameters include target air pressure and target air temperature; determining the airtight detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery includes:

[0127] Determining the absolute value of the difference between the calibrated air temperature and the target air temperature;

[0128] When the absolute value is greater than or equal to the preset air temperature difference, determining the leakage compensation amount according to the absolute value, and determining the airtight detection result of the battery based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air pressure;

[0129] When the absolute value is less than the preset air temperature difference, determining the airtight detection result of the battery based on the pressure difference between the target air pressure and the calibrated air pressure.

[0130] Refer to Figure 4 , Figure 4 FIG. is the overall flow schematic diagram of an airtight detection method provided by an embodiment of the present application. First, the battery is blocked and powered on at the feeding position. Then, the battery in the feeding position enters the calibration chamber for calibration, and the upper computer obtains the calibrated air pressure and calibrated air temperature when the battery calibration is completed. After calibration, the battery enters the test chamber, and it can choose to perform airtight testing in the positive pressure mode or the negative pressure mode in the test chamber. During the airtight testing process, the temperature in the test chamber can be controlled. The upper computer can obtain the target air temperature and target air pressure when the time for the battery to enter the test chamber from the calibration chamber is greater than or equal to the preset time, and determine whether the absolute value of the difference between the target air temperature and the calibrated air temperature is greater than or equal to the preset air temperature difference. When the absolute value of the temperature difference is greater than or equal to the preset air temperature difference, calculate the leakage compensation amount for temperature compensation.

[0131] In the case of temperature compensation, the target air pressure difference can be determined based on the leakage compensation amount and the air pressure difference between the target air pressure and the calibrated air pressure. When the absolute value of the target air pressure difference is greater than or equal to the preset air pressure difference, it is determined that the airtightness detection result indicates that the battery has a leak, the battery is a defective product, and rework for leak detection can be carried out. When the absolute value of the target air pressure difference is less than the preset air pressure difference, it is determined that the airtightness detection result indicates that the battery is a qualified product, and subsequently, the tooling required for plugging can be removed and the power-off operation can be performed.

[0132] When the absolute value of the temperature difference is less than the preset temperature difference, it is directly determined whether the target air pressure difference is greater than or equal to the preset air pressure difference. The judgment process is the same as the judgment process under the above-mentioned temperature compensation and will not be elaborated here. It should be noted that in this case, the target air pressure difference is equal to the air pressure difference between the target air pressure and the calibrated air pressure, that is, the target air pressure difference is equal to P1 - P0.

[0133] In this embodiment, the product leak detection is carried out by using the high-precision temperature sensor and air pressure sensor existing inside the battery itself. That is, the high-precision temperature sensor existing inside the battery itself can send the collected temperature of the battery to the BMS of the battery, and the air pressure sensor existing inside the battery itself can send the collected air pressure of the battery to the BMS of the battery. This solution not only realizes the batch testing of the airtightness of the battery, eliminates the need for processes such as inflating and stabilizing the pressure of the battery, simplifies the airtightness process steps, and improves production capacity and airtightness detection efficiency; moreover, this solution can reduce the influence of temperature noise and the like in the testing process on the airtightness detection result and improve the accuracy of the airtightness detection result; at the same time, this solution does not require a leak detector, reducing costs.

[0134] It should be understood that although the steps in the flowcharts involved in the above embodiments are sequentially shown according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. 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 sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0135] Based on the same inventive concept, an embodiment of the present application further provides an airtight detection device for implementing the airtight detection method involved above. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the airtight detection device provided below can refer to the limitations on the airtight detection method in the above text, and will not be repeated here.

[0136] In one embodiment, as Figure 5 shown, Figure 5 FIG. 7 is a schematic structural diagram of an airtight detection device provided by an embodiment of the present application. The device 500 includes:

[0137] An acquisition module 501, configured to acquire the target gas parameters of the battery in the test chamber when the duration for the battery to enter the test chamber from the calibration chamber in the airtight detection system is greater than or equal to a preset duration; the gas parameters in the test chamber are within a preset gas parameter range, and the air pressure in the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber.

[0138] A determination module 502, configured to determine the airtight detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery; the calibrated gas parameters are the gas parameters of the battery acquired when the gas parameters of the battery in the calibration chamber meet the calibration completion condition.

[0139] In one embodiment, the preset gas parameter range includes a preset temperature range, and the device 500 further includes:

[0140] A control module, configured to control the temperature control component in the airtight detection system to adjust the temperature of the test chamber to the preset temperature range when the temperature of the test chamber detected by the temperature sensor in the airtight detection system is outside the preset temperature range.

[0141] In one embodiment, the preset gas parameter range includes a preset air pressure range. The control module is configured to acquire the input pressure mode of the test chamber; control the pressure regulating component in the airtight detection system to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the pressure mode.

[0142] In one embodiment, the control module is specifically configured to, when the pressure mode is a positive pressure mode, control the pressure regulating valve in the pressure regulating component to adjust the air pressure of the gas provided by the gas source in the airtight detection system to the preset air pressure range corresponding to the positive pressure mode; convey the gas with the air pressure adjusted to the preset air pressure range corresponding to the positive pressure mode to the test chamber to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the positive pressure mode.

[0143] In one embodiment, the control module is specifically configured to control the pressure stabilizing component in the airtight detection system to stabilize the air pressure of the gas provided by the gas source; and control the pressure regulating valve to adjust the air pressure of the stabilized gas to the preset air pressure range corresponding to the positive pressure mode.

[0144] In one embodiment, the control module is specifically configured to adjust the air pressure of the pressure regulating valve in the pressure regulating component when the pressure mode is the negative pressure mode; and when the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, control the air extraction device in the pressure regulating component to perform a vacuum pumping process on the test chamber to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the negative pressure mode.

[0145] In one embodiment, the calibrated gas parameters include calibrated air pressure and calibrated air temperature, and the target gas parameters include target air pressure and target air temperature; the determination module 502 is specifically configured to determine the absolute value of the difference between the calibrated air temperature and the target air temperature; when the absolute value is greater than or equal to the preset air temperature difference, determine the leakage compensation amount according to the absolute value, and based on the leakage compensation amount and the air pressure difference between the target air pressure and the calibrated air pressure, determine the airtight detection result of the battery; when the absolute value is less than the preset air temperature difference, determine the airtight detection result of the battery based on the air pressure difference between the target air pressure and the calibrated air pressure.

[0146] Each module in the above airtight detection device can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor in the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above respective modules.

[0147] In one embodiment, a computer device is provided. The computer device can be a terminal, and its internal structure diagram can be as Figure 6 shown. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. The computer program, when executed by the processor, implements an airtight detection method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, a touchpad, or a mouse, etc.

[0148] Those skilled in the art can understand that Figure 6 the structure shown in

[0149] is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0150] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the steps of any of the above method embodiments are implemented. The technical principle and technical effect are similar and will not be elaborated here.

[0151] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above method embodiments are implemented. The technical principle and technical effect are similar and will not be elaborated here.

[0152] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data that have been authorized by the user or fully authorized by all parties.

[0153] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. 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 methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random access memories (ReRAM), magnetoresistive random access memories (MRAM), ferroelectric random access memories (FRAM), phase change memories (PCM), graphene memories, etc. Volatile memories can include random access memory (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0154] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An airtight detection system, characterized in that, The airtight detection system includes a host computer, a calibration chamber, and a test chamber, and the calibration chamber is connected to the test chamber; The host computer is configured to obtain the target gas parameters of the battery in the test chamber when the time for the battery to enter the test chamber from the calibration chamber is greater than or equal to a preset time, and determine the airtight detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery; Wherein, the gas parameters in the test chamber are within a preset gas parameter range, the calibrated gas parameters are the gas parameters of the battery obtained when the gas parameters of the battery in the calibration chamber meet the calibration completion condition, and the air pressure in the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber.

2. The airtight detection system according to claim 1, wherein The airtight detection system further includes a temperature control component and a temperature sensor, and the temperature sensor is arranged between the temperature control component and the test chamber; the preset gas parameter range includes a preset temperature range; The host computer is configured to control the temperature control component to adjust the temperature of the test chamber to the preset temperature range when the temperature of the test chamber detected by the temperature sensor is outside the preset temperature range.

3. The airtight detection system according to claim 1 or 2, characterized in that, The airtight detection system further includes a pressure regulating component, and the pressure regulating component is connected to the test chamber; the preset gas parameter range includes a preset pressure range; The host computer is configured to obtain the input pressure mode of the test chamber and control the pressure regulating component to adjust the air pressure in the test chamber to the preset pressure range corresponding to the pressure mode.

4. The airtight detection system according to claim 3, characterized in that, The airtight detection system further includes a gas source, and the pressure regulating component includes a pressure regulating valve, and the pressure regulating valve is respectively connected to the gas source and the test chamber; The host computer is configured to control the pressure regulating valve to adjust the air pressure of the gas provided by the gas source to the preset pressure range corresponding to the positive pressure mode and deliver the gas with adjusted air pressure to the test chamber when the pressure mode is the positive pressure mode, so as to adjust the air pressure in the test chamber to the preset pressure range corresponding to the positive pressure mode.

5. The airtight detection system according to claim 4, characterized in that, The airtight detection system further includes a voltage stabilizing component, and the voltage stabilizing component is arranged between the gas source and the pressure regulating valve; The host computer is configured to control the voltage stabilizing component to stabilize the air pressure of the gas provided by the gas source and control the pressure regulating valve to adjust the air pressure of the stabilized gas to the preset pressure range corresponding to the positive pressure mode.

6. The airtight detection system according to claim 3, characterized in that, The pressure regulating component includes a pressure regulating valve and a gas extraction device, and the pressure regulating valve is connected to the gas extraction device; The host computer is configured to adjust the air pressure of the pressure regulating valve when the pressure mode is the negative pressure mode, and control the gas extraction device to evacuate the test chamber when the air pressure of the pressure regulating valve is within the preset pressure range corresponding to the negative pressure mode, so as to adjust the air pressure in the test chamber to the preset pressure range corresponding to the negative pressure mode.

7. The airtight detection system according to claim 1 or 2, characterized in that, The calibrated gas parameters include a calibrated air pressure and a calibrated temperature, and the target gas parameters include a target air pressure and a target temperature; The host computer is configured to determine the absolute value of the temperature difference between the calibrated temperature and the target temperature; The host computer is configured to determine a leakage compensation amount according to the absolute value when the absolute value is greater than or equal to a preset temperature difference, and determine an airtightness detection result of the battery based on the leakage compensation amount and a pressure difference between the target pressure and the calibrated pressure; When the absolute value is less than the preset temperature difference, determine the airtightness detection result of the battery based on the pressure difference between the target pressure and the calibrated pressure.

8. An airtight detection method, characterized in that, The method is applied to a host computer in the airtightness detection system according to any one of claims 1-7, and the method includes: When the duration for the battery to enter the test chamber in the airtightness detection system from the calibration chamber in the airtightness detection system is greater than or equal to a preset duration, obtain target gas parameters of the battery in the test chamber; the gas parameters in the test chamber are within a preset gas parameter range, and the pressure among the gas parameters in the test chamber is not equal to the pressure in the calibration chamber; Determine an airtightness detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery; the calibrated gas parameters are the gas parameters of the battery obtained when the gas parameters of the battery in the calibration chamber meet the calibration completion condition.

9. The method according to claim 8, wherein The preset gas parameter range includes a preset temperature range, and the method further includes: When the temperature of the test chamber detected by a temperature sensor in the airtightness detection system is outside the preset temperature range, control a temperature control component in the airtightness detection system to adjust the temperature of the test chamber to the preset temperature range.

10. The method according to claim 8 or 9, characterized in that The preset gas parameter range includes a preset pressure range, and the method further includes: Obtain the input pressure mode of the test chamber; Control a pressure regulating component in the airtightness detection system to adjust the pressure in the test chamber to a preset pressure range corresponding to the pressure mode.

11. The method according to claim 10, wherein The controlling the pressure regulating component in the airtightness detection system to adjust the pressure in the test chamber to a preset pressure range corresponding to the pressure mode includes: When the pressure mode is a positive pressure mode, control a pressure regulating valve in the pressure regulating component to adjust the pressure of the gas provided by a gas source in the airtightness detection system to a preset pressure range corresponding to the positive pressure mode; Deliver the gas with the pressure adjusted to the preset pressure range corresponding to the positive pressure mode to the test chamber to adjust the pressure in the test chamber to the preset pressure range corresponding to the positive pressure mode.

12. The method according to claim 11, characterized in that, The controlling the pressure regulating valve in the pressure regulating component to adjust the pressure of the gas provided by a gas source in the airtightness detection system to a preset pressure range corresponding to the positive pressure mode includes: Control a pressure stabilizing component in the airtightness detection system to stabilize the pressure of the gas provided by the gas source; Control the pressure regulating valve to adjust the pressure of the stabilized gas to the preset pressure range corresponding to the positive pressure mode.

13. The method according to claim 10, wherein The controlling the pressure regulating component in the airtightness detection system to adjust the pressure in the test chamber to a preset pressure range corresponding to the pressure mode includes: When the pressure mode is a negative pressure mode, adjust the pressure of the pressure regulating valve in the pressure regulating component; When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, control the air extraction device in the pressure regulating component to evacuate the test chamber, so as to adjust the air pressure in the test chamber to the preset air pressure range corresponding to the negative pressure mode.

14. The method according to claim 8 or 9, characterized in that The calibrated gas parameters include calibrated air pressure and calibrated air temperature, and the target gas parameters include target air pressure and target air temperature; Determining the airtightness detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery includes: Determine the absolute value of the difference between the calibrated air temperature and the target air temperature; When the absolute value is greater than or equal to the preset temperature difference, determine the leakage compensation amount according to the absolute value, and determine the airtightness detection result of the battery based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air pressure; When the absolute value is less than the preset temperature difference, determine the airtightness detection result of the battery based on the pressure difference between the target air pressure and the calibrated air pressure.

15. An airtight detection device, characterized in that, The device is arranged in the host computer of the airtightness detection system according to any one of claims 1-7, and the device includes: An acquisition module, configured to acquire the target gas parameters of the battery in the test chamber when the duration for which the battery enters the test chamber in the airtightness detection system from the calibration chamber in the airtightness detection system is greater than or equal to a preset duration; the gas parameters in the test chamber are within a preset gas parameter range, and the air pressure in the gas parameters in the test chamber is not equal to the air pressure in the calibration chamber; A determination module, configured to determine the airtightness detection result of the battery according to the target gas parameters and the calibrated gas parameters of the battery; the calibrated gas parameters are the gas parameters of the battery acquired when the gas parameters of the battery in the calibration chamber meet the calibration completion condition.

16. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 8 to 14 are implemented.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 8 to 14 are implemented.

18. A computer program product comprising a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 8 to 14 are implemented.

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