Air tightness testing systems, methods, apparatus, equipment, storage media and program products

Abstract

This application relates to an airtightness testing system, method, apparatus, device, storage medium, and program product. A host computer acquires the target gas parameters of the battery in a test chamber where the gas parameters are within a preset range and the time taken for the battery to enter the test chamber from the calibration chamber is greater than or equal to a preset time, and the gas pressure is not equal to the gas pressure in the calibration chamber. Based on the target gas parameters and the battery's calibration gas parameters, the airtightness test result of the battery is determined. Since the airtightness testing system provided in this embodiment does not require a charging stage or a pressure stabilization stage, but directly executes the testing stage—that is, it directly determines the battery's airtightness test result based on the target gas parameters of the battery in the test chamber obtained when the battery's time in the test chamber is greater than or equal to a preset time—the complexity of the testing process is reduced, thereby improving the airtightness testing efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an airtightness detection system, method, apparatus, equipment, storage medium, and program product. Background Technology

[0002] In order to control the defect rate of batteries and improve the quality of batteries leaving the factory, it is necessary to conduct airtightness testing on batteries.

[0003] Current airtightness testing includes four stages: inflation, pressure stabilization, testing, and venting. First, gas from a gas source is injected into the battery under test. After a period of time, the internal pressure of the battery stabilizes. Then, a sensor monitors the internal pressure of the battery, and the difference between this pressure and a reference pressure is used as the airtightness test result. After the test is completed, a venting stage is required to safely release the gas from the battery under test.

[0004] However, the current airtightness testing process is quite complex, resulting in low airtightness testing efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide an airtightness testing system, method, apparatus, equipment, storage medium, and program product that can improve the airtightness testing efficiency of batteries in response to the above-mentioned technical problems.

[0006] In a first aspect, this application provides an airtightness testing system, which includes a host computer, a calibration chamber, and a test chamber, with the calibration chamber connected to the test chamber;

[0007] The host computer is used to acquire the target gas parameters of the battery in the test chamber when the time it takes for the battery to enter the test chamber from the calibration chamber is greater than or equal to the preset time. Based on the target gas parameters and the battery's calibration gas parameters, the host computer determines the airtightness test result of the battery.

[0008] The gas parameters in the test chamber are within a preset gas parameter range. The calibration 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 conditions. The gas pressure in the test chamber is not equal to the gas pressure in the calibration chamber.

[0009] The airtightness testing system provided in this embodiment acquires the target gas parameters of the battery in the test chamber where the gas parameters are within a preset range, provided that the battery's time from entering the calibration chamber is greater than or equal to a preset time. The target gas parameters are then compared to the gas pressure within the calibration chamber. Based on these target gas parameters and the battery's calibration gas parameters, the airtightness test result is determined. Since this airtightness testing system eliminates the need for a charging and stabilization phase, directly executing the testing phase—that is, determining the battery's airtightness test result based solely on the calibration gas parameters and the target gas parameters acquired when the battery's time in the test chamber is greater than or equal to a preset time—the complexity of the testing process is reduced, thereby improving airtightness testing efficiency.

[0010] In one embodiment, the airtightness testing system further includes a temperature control component and a temperature sensor, with the temperature sensor disposed between the temperature control component and the test chamber; the preset air parameter range includes a preset temperature range;

[0011] The host 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 detected by the temperature sensor is outside the preset temperature range.

[0012] The airtightness testing system provided in this embodiment adjusts the air temperature of the test chamber to the preset temperature range when the temperature sensor detects that the air temperature in the test chamber is outside the preset temperature range. Since traditional airtightness testing systems are easily affected by ambient temperature—too high or too low a temperature can affect the accuracy of the airtightness test results—this embodiment maintains the air temperature in the test chamber within the preset temperature range, reducing the possibility of excessively high or low ambient temperatures. This reduces the impact of ambient temperature on the airtightness test results, thereby improving the accuracy of the airtightness test results.

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

[0014] The host computer is used to acquire 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] The airtightness testing system provided in this embodiment uses a host computer to control a 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. This allows the air pressure in the test chamber to be adjusted to the preset air pressure range corresponding to the pressure mode as needed, thereby enabling airtightness testing of the battery under the selected pressure mode.

[0016] In one embodiment, the airtightness testing system further includes an air source, and the pressure regulating component includes a pressure regulating valve, which is connected to the air source and the test chamber respectively.

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

[0018] The airtightness testing system provided in this embodiment, when the pressure mode is positive pressure mode, controls the pressure regulating valve to adjust the gas pressure supplied by the gas source to the preset gas pressure range corresponding to the positive pressure mode, and delivers the gas with adjusted pressure to the test chamber, so as to adjust the gas pressure in the test chamber to the preset gas pressure range corresponding to the positive pressure mode, thereby providing the prerequisite for performing airtightness testing on the battery in the test chamber in positive pressure mode.

[0019] In one embodiment, the airtightness detection system further includes a pressure stabilizing component disposed between the air source and the pressure regulating valve;

[0020] The host computer is used to control the pressure stabilizing component to stabilize the gas pressure supplied by the gas source, and to control the pressure regulating valve to adjust the pressure of the stabilized gas to the preset pressure range corresponding to the positive pressure mode.

[0021] The airtightness testing system provided in this embodiment uses a host computer to control a pressure stabilizing component to stabilize the gas pressure supplied by the gas source, and to control a pressure regulating valve to adjust the stabilized gas pressure to a preset pressure range corresponding to the positive pressure mode. Because the pressure regulating valve adjusts the stabilized gas pressure to the preset pressure range corresponding to the positive pressure mode, the gas pressure delivered to the test chamber by the pressure regulating valve is more stable, reducing the impact of unstable gas pressure in the test chamber on the airtightness testing results and improving the accuracy of the obtained airtightness testing results.

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

[0023] The host computer is used to adjust the air pressure of the pressure regulating valve when the pressure mode is negative pressure mode. When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, the host computer controls the air extraction device to perform vacuum treatment 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] The airtightness testing system provided in this embodiment allows the host computer to adjust the air pressure of the pressure regulating valve when the pressure mode is negative. When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, the host computer controls the air extraction device to perform vacuum treatment 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, thereby providing the prerequisite for performing airtightness testing on the battery in the test chamber in positive pressure mode.

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

[0026] The host computer is used to determine the absolute value of the temperature difference between the calibration temperature and the target temperature;

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

[0028] The airtightness detection system provided in this embodiment determines the leakage compensation amount based on the absolute value 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. Based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air 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.

[0029] Secondly, this application also provides an airtightness detection device. The device is installed in the host computer of any of the above-mentioned airtightness detection systems, and the device includes:

[0030] The acquisition module is used to acquire the target gas parameters of the battery in the test chamber when the time it takes for the battery to enter the test chamber of the airtightness testing system from the calibration chamber of the airtightness testing system is greater than or equal to a preset time; the gas parameters in the test chamber are within the preset gas parameter range, and the gas pressure in the gas parameters in the test chamber is not equal to the gas pressure in the calibration chamber.

[0031] The determination module is used to determine the airtightness test result of the battery based on the target air parameters and the battery's calibration air parameters; the calibration air parameters are the air parameters of the battery obtained when the air parameters of the battery in the calibration chamber meet the calibration completion conditions.

[0032] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of any of the above-described airtightness detection methods.

[0033] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of any of the above-described airtightness detection methods.

[0034] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of any of the above-described airtightness detection methods.

[0035] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of an airtightness detection system provided in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the structure of an airtightness detection system provided in an embodiment of this application;

[0039] Figure 3 This is a schematic flowchart of an airtightness testing method provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the overall process of an airtightness detection method provided in an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the structure of an airtightness detection device provided in an embodiment of this application;

[0042] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0043] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this 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 art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the 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 used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0049] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0051] In order to control the defect rate of batteries and improve the quality of batteries leaving the factory, it is necessary to conduct airtightness testing on batteries.

[0052] Current airtightness testing comprises four stages: inflation, pressure stabilization, testing, and venting. In the inflation stage, gas from a gas source is first injected into the battery under test. In the pressure stabilization stage, the internal pressure of the battery stabilizes after a certain period. Following the pressure stabilization stage, the testing stage begins, where sensors monitor the internal pressure of the battery, and the difference between this pressure and a reference pressure is used as the airtightness test result. After the test, the venting stage is initiated, where the gas inside the battery is safely released after the test.

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

[0054] To address the aforementioned technical problems, embodiments of this application provide an airtightness detection system, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of an airtightness testing system provided in an embodiment of this application. The airtightness testing system includes a host computer, a calibration chamber, and a test chamber, with the calibration chamber connected to the test chamber.

[0055] The host computer is used to acquire the target gas parameters of the battery in the test chamber when the time it takes for the battery to enter the test chamber from the calibration chamber is greater than or equal to the preset time. Based on the target gas parameters and the battery's calibration gas parameters, the host computer determines the airtightness test result of the battery.

[0056] The gas parameters in the test chamber are within a preset gas parameter range. The calibration 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 conditions. The gas pressure in the test chamber is not equal to the gas pressure in the calibration chamber.

[0057] In this embodiment, the battery is a pre-sealed battery, meaning that the connection points with the connecting components can be sealed, such as the coolant inlet / outlet and electrical interfaces. Each battery can be sealed at the inlet point A. With the first automatic sealing door K1 open, the sealed battery can enter the calibration chamber through K1. Multiple batteries can be sealed simultaneously at inlet point A; the specific number can be determined according to actual needs. The calibration chamber can be connected to the test chamber via a second automatic sealing door K2. With K2 open, the batteries in the calibration chamber can enter the test chamber. If the gas parameters of the batteries in the calibration chamber meet the calibration completion conditions, they can enter the test chamber. The host computer can control an Automated Guided Vehicle (AGV) to transport the batteries from the calibration chamber to the test chamber. An AGV is a transportation device that uses electromagnetic, laser, or other navigation technologies to achieve unmanned driving and can automatically travel along a set path.

[0058] The target gas parameters for a battery may include the battery's gas pressure. Alternatively, the target gas parameters for a battery may include both the battery's target gas pressure and target temperature. When the target gas parameters include the battery's gas pressure, the battery's calibration gas parameters may include the battery's calibration gas pressure. When the target gas parameters include both the battery's target gas pressure and target temperature, the battery's calibration gas parameters may include both the battery's calibration gas pressure and calibration temperature.

[0059] After the battery enters the calibration chamber, the second automatic sealing door K2 and the third automatic sealing door K3 can be closed. The battery management system (BMS) inside the calibration chamber automatically reads the battery's temperature and pressure in real time and transmits this data to the host computer. The BMS can also transmit this data to the host computer via a Controller Area Network (CAN) box, a communication interface device based on CAN bus technology. Alternatively, the BMS can connect directly to the host computer's USB port via a USB interface chip, enabling real-time transmission of the battery's temperature and pressure data from the BMS to the host computer via the USB interface chip.

[0060] In one possible implementation, the host computer can determine that the battery's gas parameters meet the calibration completion conditions if the battery has been in the calibration chamber for a preset period of time. The host computer then uses the gas parameters of the battery that meet the calibration completion conditions as the calibration gas parameters. Specifically, if the battery has been in the calibration chamber for a preset period of time, the host computer can receive the battery's gas pressure from the BMS as the calibration gas pressure, and the battery's air temperature from the BMS as the calibration air temperature.

[0061] In another possible implementation, the host computer can compare two adjacent air pressures received from the BMS to obtain an air pressure comparison result, and compare two adjacent air temperatures received from the BMS to obtain an air temperature comparison result. If the absolute value of the air pressure change is less than a preset air pressure change, and the absolute value of the air temperature change is less than a preset air temperature change, the gas parameters of the battery are determined to meet the calibration completion conditions, and the gas parameters of the battery that meet the calibration completion conditions are used as the calibration gas parameters.

[0062] In this embodiment, the preset gas parameter range may include a preset gas pressure range, or the preset gas parameter range may include a preset gas pressure range and a preset temperature range. The host computer can control the temperature control component to adjust the temperature of the test chamber to the preset temperature range if the temperature sensor detects that the temperature of the test chamber is outside 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] The airtightness test result of the battery is determined based on the target gas parameters and the battery's calibration gas parameters, which can be achieved in the following way:

[0065] In one possible implementation, when the target gas parameter includes the target gas pressure of the battery and the calibration gas parameter of the battery includes the calibration gas pressure of the battery, the pressure difference between the target gas pressure and the calibration gas pressure is determined, and the airtightness test result of the battery is determined based on the pressure difference between the target gas pressure and the calibration gas pressure.

[0066] In another possible implementation, when the target gas parameters include the target gas pressure and target temperature of the battery, and the calibration gas parameters of the battery include the calibration gas pressure and calibration temperature of the battery, the absolute value of the temperature difference between the calibration temperature and the target temperature can be determined. If the absolute value is greater than or equal to the preset temperature difference, the leakage compensation amount is determined based on the absolute value. Based on the leakage compensation amount and the pressure difference between the target gas pressure and the calibration gas pressure, the airtightness test result of the battery is determined. If the absolute value is less than the preset temperature difference, the airtightness test result of the battery is determined based on the pressure difference between the target gas pressure and the calibration gas pressure.

[0067] The airtightness test result of the battery is determined based on the pressure difference between the target air pressure and the calibrated air pressure. This can include: if the absolute value of the pressure difference is greater than or equal to the preset pressure difference, the airtightness test result is determined to be that the battery has a leak; if the absolute value of the pressure difference is less than the preset pressure difference, the airtightness test result is determined to be that the battery does not have a leak.

[0068] The airtightness test result of the battery is determined based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air pressure. This can include: determining the target air pressure difference based on the leakage compensation amount and the pressure difference; if the absolute value of the target air pressure difference is greater than or equal to the preset air pressure difference, the airtightness test result is determined to be that the battery has a leak; if the absolute value of the target air pressure difference is less than the preset air pressure difference, the airtightness test result is determined to be that the battery does not have a leak.

[0069] In this embodiment, batteries that have undergone airtightness testing can enter the discharge channel D through the third automatic sealing door K3. For qualified products, the sealing fixtures can be removed, and the batteries can be de-energized; for unqualified products, leak points can be located. Qualified products include batteries without leaks, and unqualified products include 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. The air pressure in the test chamber is maintained within the preset air pressure range corresponding to the pressure mode, and the air tightness test of the battery in the test chamber can continue.

[0071] It should be noted that the number of batteries in the test chamber can be multiple, thus enabling batch testing of multiple batteries simultaneously, saving testing costs and improving testing efficiency.

[0072] The airtightness testing system provided in this embodiment acquires the target gas parameters of the battery in the test chamber where the gas parameters are within a preset range, provided that the battery's time from entering the calibration chamber is greater than or equal to a preset time. The target gas parameters are then compared to the gas pressure within the calibration chamber. Based on these target gas parameters and the battery's calibration gas parameters, the airtightness test result is determined. Since this airtightness testing system eliminates the need for a charging and stabilization phase, directly executing the testing phase—that is, determining the battery's airtightness test result based solely on the calibration gas parameters and the target gas parameters acquired when the battery's time in the test chamber is greater than or equal to a preset time—the complexity of the testing process is reduced, thereby improving airtightness testing efficiency.

[0073] In one embodiment, such as Figure 2 As shown, Figure 2 This is a schematic diagram of an airtightness testing system provided in an embodiment of this application. The airtightness testing system also includes a temperature control component H and a temperature sensor N, with the temperature sensor N disposed between the temperature control component H and the test chamber C; the preset air parameter range includes a preset temperature range;

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

[0075] The preset temperature range is generally from 18 degrees Celsius (°C) to 28°C. When the air temperature in test chamber C detected by temperature sensor N is below 18°C, the host computer can control the temperature control component H to heat the gas in test chamber C to increase the air temperature. When the air temperature in test chamber C detected by temperature sensor N is above 28°C, the host computer can control the temperature control component H to cool the gas in test chamber C to decrease the air temperature, thereby adjusting the air temperature in test chamber C to the preset temperature range.

[0076] The airtightness testing system provided in this embodiment adjusts the air temperature of the test chamber to the preset temperature range when the temperature sensor detects that the air temperature in the test chamber is outside the preset temperature range. Since traditional airtightness testing systems are easily affected by ambient temperature—too high or too low a temperature can affect the accuracy of the airtightness test results—this embodiment maintains the air temperature in the test chamber within the preset temperature range, reducing the possibility of excessively high or low ambient temperatures. This reduces the impact of ambient temperature on the airtightness test results, thereby improving the accuracy of the airtightness test results.

[0077] In one embodiment, such as Figure 2 As shown, the airtightness testing system also includes a pressure regulating component, which is connected to the test chamber C; the preset air parameter range includes a preset air pressure range;

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

[0079] In this embodiment, the user can select a pressure mode with a single click. The pressure mode includes positive pressure mode or negative pressure mode. The user can select the pressure mode based on the actual application scenario of the battery. For example, if the battery's application scenario is a positive pressure scenario, then positive pressure mode can be selected. When the pressure mode is positive pressure mode, the pressure regulating component can be controlled to adjust the air pressure in test chamber C to the preset air pressure range corresponding to the positive pressure mode. The air pressure in the preset air pressure range corresponding to the positive pressure mode is greater than the air pressure in the calibration chamber. 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 test chamber C is within the preset air pressure range corresponding to the positive pressure mode based on the air pressure detected by pressure sensor I.

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

[0081] The airtightness testing system provided in this embodiment uses a host computer to control a 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. This allows the air pressure in the test chamber to be adjusted to the preset air pressure range corresponding to the pressure mode as needed, thereby enabling airtightness testing of the battery under the selected pressure mode.

[0082] In one embodiment, such as Figure 2 As shown, when the pressure mode is positive pressure mode, the airtightness detection system may also include an air source O, and a pressure regulating component including a pressure regulating valve Q, which is connected to the air source and the test chamber C respectively.

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

[0084] In this embodiment, the host computer can control the pressure regulating valve Q to adjust to the preset pressure range corresponding to the positive pressure mode. This allows the pressure regulating valve Q to adjust the gas pressure supplied by the gas source O to the preset pressure range corresponding to the positive pressure mode. The adjusted gas, when the first pneumatic control valve J1 is open, can be delivered to the test chamber C through J1 to adjust the pressure in the test chamber C to the preset pressure range corresponding to the positive pressure mode. For example, the preset pressure range corresponding to the positive pressure mode can be determined based on a preset positive pressure. If the preset positive pressure is 3 kPa, then the upper limit of the preset pressure range can be 3.1 kPa, and the lower limit can be 2.9 kPa. That is, if the desired pressure in the test chamber is 3 kPa, then the preset pressure range can be from 2.9 kPa to 3.1 kPa. Here, the preset positive pressure is a relative pressure. Absolute pressure = atmospheric pressure + relative pressure. A negative relative pressure indicates a vacuum. For example, atmospheric pressure is 101 kPa, relative pressure is 3 kPa, and the corresponding absolute pressure is 104 kPa; relative pressure is -3 kPa, and the corresponding absolute pressure is 98 kPa.

[0085] The airtightness testing system provided in this embodiment, when the pressure mode is positive pressure mode, controls the pressure regulating valve to adjust the gas pressure supplied by the gas source to the preset gas pressure range corresponding to the positive pressure mode, and delivers the gas with adjusted pressure to the test chamber, so as to adjust the gas pressure in the test chamber to the preset gas pressure range corresponding to the positive pressure mode, thereby providing the prerequisite for performing airtightness testing on the battery in the test chamber in positive pressure mode.

[0086] In one embodiment, such as Figure 2 As shown, the airtightness detection system also includes a pressure stabilizing component, which is located between the air source O and the pressure regulating valve Q;

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

[0088] In one possible implementation, the pressure stabilizing component may include a pressure stabilizing tank P. After the gas source O enters the pressure stabilizing tank P, the pressure stabilizing tank P can stabilize the pressure of the gas source O. The gas after being stabilized by the pressure stabilizing tank P is then adjusted to the preset gas pressure range corresponding to the positive pressure mode by the pressure regulating valve Q.

[0089] In another possible implementation, the pressure stabilizing assembly may include a pressure stabilizing tank P and a pneumatic triplet S1. The pneumatic triplet S1 is connected to the gas source O and the pressure stabilizing tank P. The pneumatic triplet S1 can filter the gas supplied by the gas source to remove impurities. The filtered gas is then sent to the pressure stabilizing tank P for pressure stabilization. After being pressure stabilized by the pressure stabilizing tank P, the gas is then adjusted to the preset pressure range corresponding to the positive pressure mode by the pressure regulating valve Q. After being filtered by the pneumatic triplet S1, the cleanliness of the gas delivered to the pressure stabilizing tank P can be improved, reducing the probability of impurities entering the pressure regulating valve, thereby reducing the impact on the life of the pressure regulating valve and enabling the airtightness detection system to operate more safely, efficiently, and stably.

[0090] The airtightness testing system provided in this embodiment uses a host computer to control a pressure stabilizing component to stabilize the gas pressure supplied by the gas source, and to control a pressure regulating valve to adjust the stabilized gas pressure to a preset pressure range corresponding to the positive pressure mode. Because the pressure regulating valve adjusts the stabilized gas pressure to the preset pressure range corresponding to the positive pressure mode, the gas pressure delivered to the test chamber by the pressure regulating valve is more stable, reducing the impact of unstable gas pressure in the test chamber on the airtightness testing results and improving the accuracy of the obtained airtightness testing results.

[0091] In one embodiment, such as Figure 2 As shown, when the pressure mode is negative pressure mode, the pressure regulating component may include a pressure regulating valve Q and an air extraction device G, with the pressure regulating valve Q 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 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, the host computer controls the vacuum device G to perform vacuum treatment on the test chamber C, so as to adjust the air pressure in the test chamber C to the preset air pressure range corresponding to the negative pressure mode.

[0093] When the pressure mode is negative pressure mode, the first air control valve J1 needs to be closed and the second air control valve J2 needs to be opened. The air pressure of the pressure regulating valve Q is adjusted 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, the air extraction device G is controlled to perform vacuum treatment 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.

[0094] For example, the preset pressure range corresponding to the negative pressure mode can be determined based on the preset negative pressure. If the preset negative pressure is -3 kPa, then the upper limit of the preset pressure range can be -3.1 kPa to -2.9 kPa. That is, if the air pressure in the test chamber is expected to reach -3 kPa, then the preset pressure range can be -3.1 kPa to -2.9 kPa. Here, the preset negative pressure is a 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 determine whether the pressure of the test chamber has reached the preset pressure range corresponding to the negative pressure mode based on the pressure detected by the vacuum sensor M.

[0096] The airtightness testing system provided in this embodiment allows the host computer to adjust the air pressure of the pressure regulating valve when the pressure mode is negative. When the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, the host computer controls the air extraction device to perform vacuum treatment 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, thereby providing the prerequisite for performing airtightness testing on the battery in the test chamber in positive pressure mode.

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

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

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

[0100] In this embodiment, the battery's BMS can monitor the battery's temperature and pressure in real time and send these real-time readings to the host computer via the CAN box E. The host computer can use the battery temperature received when the battery's time from entering the test chamber from the calibration chamber is greater than or equal to a preset time as the target temperature, and the battery pressure received in this case as the target pressure. In other words, the host computer obtains the target air parameters of the battery in the test chamber. This embodiment supports parallel connection of multiple CAN boxes or the deployment of multiple CAN box communication interface devices. The number of CAN box communication interface devices can be flexibly configured according to the actual number of batteries being tested.

[0101] If the calibrated temperature is represented by T0, the calibrated pressure by P0, the target temperature by T1, and the target pressure by P1, the absolute value of the temperature difference between the calibrated temperature and the target temperature can be determined. If 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, which will affect the airtightness test results. Therefore, in order to improve the accuracy of the airtightness test results, this embodiment calculates the leakage compensation amount and performs compensation based on the leakage compensation amount in this case, thereby improving the accuracy of the obtained airtightness test results.

[0102] That is, in > Calculate the leakage compensation amount based on the preset temperature difference. The compensation logic is: Leakage compensation amount = α × +β, where α is the first compensation coefficient and β is the second compensation coefficient. Given the leakage compensation amount, the target pressure difference can be determined based on the leakage compensation amount and the pressure difference, and the battery's airtightness test result can be determined based on the target pressure difference.

[0103] For example, when T1 is greater than T0 and If the air pressure difference exceeds the preset temperature difference, the leakage compensation amount can be calculated based on the leakage compensation formula. The result obtained by subtracting the leakage compensation amount from the pressure difference between the target and 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, the airtightness test result indicates a leak, and the battery is a defective product. If the target air pressure difference is less than the preset air pressure difference, the airtightness test result indicates no leak, and the battery is a qualified product. The presence of a battery leak means there is a risk of air leakage, or if the battery is used in a wet environment, water may enter the battery through the leak point, affecting battery life. Therefore, in this case, rework is necessary to locate the leak point.

[0104] The airtightness detection system provided in this embodiment determines the leakage compensation amount based on the absolute value 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. Based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air 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 acquired calibration gas parameters and target gas parameters to the temperature compensation device T. The temperature compensation device T determines the absolute value of the temperature difference between the calibration temperature in the calibration gas parameters and the target temperature in the target gas parameters. If the absolute value is greater than or equal to the preset temperature difference, the leakage compensation amount is determined based on the absolute value. Based on the leakage compensation amount and the pressure difference between the target gas pressure and the calibration gas pressure, the airtightness test result of the battery is determined. If the absolute value is less than the preset temperature difference, the airtightness test result of the battery is determined based on the pressure difference between the target gas pressure and the calibration gas pressure.

[0106] The temperature compensation device T can send the confirmed airtightness test results to the host computer, so that the host computer can determine whether the product is qualified based on the airtightness test results.

[0107] The process by which the temperature compensation device T determines the airtightness test result is as follows: Based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air pressure, a target air pressure difference is determined. If the absolute value of the target air pressure difference is greater than or equal to the preset air pressure difference, the battery is considered to have a leak, and the airtightness test result indicates that the battery is a defective product, requiring rework to locate the leak. If the absolute value of the target air pressure difference is less than the preset air pressure difference, the airtightness test result indicates that the battery is a qualified product, and the necessary sealing fixtures can be removed and the power-off operation can proceed.

[0108] If the absolute value of the temperature difference is less than the preset temperature difference, directly determine whether the target air pressure difference is greater than or equal to the preset air pressure difference. The judgment process is the same as that under temperature compensation, i.e., if the absolute value of the target air pressure difference is greater than or equal to the preset air pressure difference, the battery is considered to have a leak, and the airtightness test result indicates that the battery is a defective product and can be reworked to find the leak. If the absolute value of the target air pressure difference is less than the preset air pressure difference, the airtightness test result indicates that the battery is a qualified product, and the necessary sealing tools can be removed and the power-off operation can be performed. It should be noted that in this case, the target air pressure difference is equal to the difference between the target air pressure and the calibrated air pressure, i.e., the target air pressure difference is equal to P1-P0.

[0109] like Figure 3 As shown, this application embodiment also provides an airtightness detection method, which is applied to the host computer in the airtightness detection system of any of the above embodiments. Figure 3This is a flowchart illustrating an airtightness testing method provided in an embodiment of this application. The method may include the following steps:

[0110] S301, if the time it takes for the battery to move from the calibration chamber in the airtightness testing system to the test chamber in the airtightness testing system is greater than or equal to a preset time, obtain the target gas parameters of the battery in the test chamber; the gas parameters in the test chamber are within the preset gas parameter range, and the gas pressure in the gas parameters in the test chamber is not equal to the gas pressure in the calibration chamber.

[0111] S302, determine the airtightness test result of the battery based on the target air parameters and the battery calibration air parameters; the calibration air parameters are the air parameters of the battery obtained when the air parameters of the battery in the calibration chamber meet the calibration completion conditions.

[0112] The preset gas parameter range includes a preset temperature range, and the method also includes:

[0113] If the temperature sensor in the airtightness testing system detects that the air temperature in the test chamber is outside the preset temperature range, the temperature control component in the airtightness testing system will adjust the air temperature in the test chamber to the preset temperature range.

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

[0115] Obtain the stress pattern of the test chamber from the input;

[0116] The pressure regulating component in the airtightness testing system adjusts 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 of the airtightness testing system to adjust the air pressure in the test chamber to a preset air pressure range corresponding to the pressure mode includes:

[0118] When the pressure mode is positive pressure mode, the pressure regulating valve in the control pressure regulating component adjusts the gas pressure supplied by the gas source in the airtightness detection system to the preset gas pressure range corresponding to the positive pressure mode.

[0119] Gas with its pressure adjusted to the preset pressure range corresponding to the positive pressure mode is delivered to the test chamber to adjust the pressure in the test chamber to the preset pressure range corresponding to the positive pressure mode.

[0120] In one embodiment, controlling the pressure regulating valve in the pressure regulating assembly to adjust the gas pressure supplied by the gas source in the airtightness detection system to a preset pressure range corresponding to the positive pressure mode includes:

[0121] The pressure stabilizing component in the airtightness detection system stabilizes the pressure of the gas supplied by the gas source.

[0122] The pressure regulating valve adjusts the pressure of the stabilized gas to the preset pressure range corresponding to the positive pressure mode.

[0123] In one embodiment, controlling the pressure regulating component of the airtightness testing system to adjust the air pressure in the test chamber to a preset air pressure range corresponding to the pressure mode includes:

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

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

[0126] In one embodiment, the calibration gas parameters include calibration gas pressure and calibration temperature, and the target gas parameters include target gas pressure and target temperature; based on the target gas parameters and the battery's calibration gas parameters, the airtightness test result of the battery is determined, including:

[0127] Determine the absolute value of the temperature difference between the calibration temperature and the target temperature;

[0128] If the absolute value is greater than or equal to the preset temperature difference, the leakage compensation amount is determined based on the absolute value. Based on the leakage compensation amount and the pressure difference between the target air pressure and the calibrated air pressure, the airtightness test result of the battery is determined.

[0129] If the absolute value is less than the preset temperature difference, the airtightness test result of the battery is determined based on the pressure difference between the target air pressure and the calibrated air pressure.

[0130] Reference Figure 4 , Figure 4 This is a schematic diagram of the overall process of an airtightness testing method provided in this application embodiment. First, the battery is sealed at the inlet and powered on. Then, the battery enters the calibration chamber for calibration. The host computer acquires the calibration pressure and temperature after calibration. After calibration, the battery enters the test chamber. Airtightness testing can be performed in either positive or negative pressure mode. During the airtightness test, the temperature inside the test chamber can be controlled. The host computer can acquire the target temperature and target pressure when the time it takes for the battery to enter the test chamber from the calibration chamber is greater than or equal to a preset time. It then determines whether the absolute value of the temperature difference between the target temperature and the calibration temperature is greater than or equal to a preset temperature difference. If the absolute value of the temperature difference is greater than or equal to the preset temperature difference, a leakage compensation amount is calculated for temperature compensation.

[0131] When temperature compensation is applied, 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. If the absolute value of the target pressure difference is greater than or equal to the preset pressure difference, the airtightness test result indicates that the battery has a leak, and the battery is a defective product that can be reworked to find the leak. If the absolute value of the target pressure difference is less than the preset pressure difference, the airtightness test result indicates that the battery is a qualified product, and the necessary sealing fixtures can be removed and the power-off operation can be performed.

[0132] If the absolute value of the temperature difference is less than the preset temperature difference, directly determine whether the target air pressure difference is greater than or equal to the preset air pressure difference. The determination process is the same as that under temperature compensation, and will not be repeated 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, leak detection is performed using high-precision temperature and pressure sensors inherent within the battery. The temperature sensor transmits the collected battery temperature data to the battery's BMS, while the pressure sensor transmits the collected battery pressure data to the BMS. This solution not only enables batch testing of battery airtightness without requiring charging or voltage stabilization, simplifying the airtightness process and improving production capacity and testing efficiency, but also reduces the impact of temperature and noise during testing on the results, improving accuracy. Furthermore, this solution eliminates the need for a leak detector, reducing costs.

[0134] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0135] Based on the same inventive concept, this application also provides an airtightness detection device for implementing the airtightness detection method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more airtightness detection device embodiments provided below can be found in the limitations of the airtightness detection method described above, and will not be repeated here.

[0136] In one embodiment, such as Figure 5 As shown, Figure 5 This is a schematic diagram of an airtightness detection device provided in an embodiment of this application. The device 500 includes:

[0137] The acquisition module 501 is used to acquire the target gas parameters of the battery in the test chamber when the time it takes for the battery to enter the test chamber of the airtightness testing system from the calibration chamber of the airtightness testing system is greater than or equal to a preset time; the gas parameters in the test chamber are within a preset gas parameter range, and the gas pressure in the gas parameters in the test chamber is not equal to the gas pressure in the calibration chamber.

[0138] The determination module 502 is used to determine the air tightness test result of the battery based on the target air parameters and the calibration air parameters of the battery; the calibration air parameters are the air parameters of the battery obtained when the air parameters of the battery in the calibration chamber meet the calibration completion conditions.

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

[0140] The control module is used to adjust the temperature of the test chamber to the preset temperature range when the temperature sensor in the airtightness testing system detects that the temperature of the test chamber is outside the preset temperature range.

[0141] In one embodiment, the preset air parameter range includes a preset air pressure range. The control module is used to acquire the pressure mode of the input test chamber and control the pressure regulating component in the airtightness 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 used to control the pressure regulating valve in the pressure regulating component to adjust the gas pressure provided by the gas source in the airtightness detection system to the preset gas pressure range corresponding to the positive pressure mode when the pressure mode is positive pressure mode; and to deliver the gas whose pressure has been adjusted to the preset gas pressure range corresponding to the positive pressure mode to the test chamber, so as to adjust the gas pressure in the test chamber to the preset gas pressure range corresponding to the positive pressure mode.

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

[0144] In one embodiment, the control module is specifically used to adjust the air pressure of the pressure regulating valve in the pressure regulating component when the pressure mode is negative pressure mode; and to control the air extraction device in the pressure regulating component to perform vacuuming of the test chamber when the air pressure of the pressure regulating valve is within the preset air pressure range corresponding to the negative pressure mode, so as 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 calibration gas parameters include calibration gas pressure and calibration temperature, and the target gas parameters include target gas pressure and target temperature. The determining module 502 is specifically used to determine the absolute value of the temperature difference between the calibration temperature and the target temperature. If the absolute value is greater than or equal to a preset temperature difference, the leakage compensation amount is determined based on the absolute value, and the airtightness test result of the battery is determined based on the leakage compensation amount and the pressure difference between the target gas pressure and the calibration gas pressure. If the absolute value is less than the preset temperature difference, the airtightness test result of the battery is determined based on the pressure difference between the target gas pressure and the calibration gas pressure.

[0146] Each module in the aforementioned airtightness testing device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0147] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown, the computer device includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements an airtightness detection method. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0148] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0149] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of any of the above method embodiments. The technical principles and effects are similar and will not be repeated here.

[0150] 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, it implements the steps of any of the above method embodiments. The technical principles and effects are similar and will not be repeated here.

[0151] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of any of the above method embodiments. The technical principles and effects are similar and will not be repeated 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 used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0153] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this 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), magnetic 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. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0154] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this specification.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A leak detection system, characterized by, The air tightness detection system comprises a host computer, a calibration bin and a test bin, and the calibration bin is connected with the test bin; The host computer is configured to, in a case where a time duration of a battery entering the test bin from the calibration bin is greater than or equal to a preset time duration, acquire a target gas parameter of the battery in the test bin, and determine an air tightness detection result of the battery according to the target gas parameter and a calibration gas parameter of the battery; In the test bin, the gas parameter is in a preset gas parameter interval, the calibration gas parameter is a gas parameter of a battery in the calibration bin, and the calibration gas parameter is acquired in a case where the calibration gas parameter satisfies a calibration completion condition; a gas pressure in the test bin is not equal to a gas pressure in the calibration bin; the calibration completion condition is satisfied in a case where a time duration of the battery entering the calibration bin reaches a preset value, or a gas pressure comparison result of the battery entering the calibration bin is that an absolute value of a gas pressure change amount is less than a preset gas pressure change amount, and a gas temperature comparison result is that an absolute value of a gas temperature change amount is less than a preset gas temperature change amount; the gas pressure comparison result is a result of a comparison of two adjacent gas pressures transmitted by a battery management system (BMS) of the battery by the host computer, and the gas temperature comparison result is a result of a comparison of two adjacent gas temperatures transmitted by the BMS by the host computer; The air tightness detection system further comprises a pressure regulating assembly, the pressure regulating assembly is connected with the test bin, and the preset gas parameter interval comprises a preset gas pressure interval; The host computer is configured to acquire an input pressure mode of the test bin, and control the pressure regulating assembly to adjust a gas pressure in the test bin to the preset gas pressure interval corresponding to the pressure mode; The air tightness detection system further comprises a gas source, the pressure regulating assembly comprises a pressure regulating valve, and the pressure regulating valve is connected with the gas source and the test bin, respectively; In a case where the pressure mode is a positive pressure mode, the host computer is configured to control the pressure regulating valve to adjust a gas pressure of gas provided by the gas source to a preset gas pressure interval corresponding to the positive pressure mode, and to deliver the gas after the adjustment of the gas pressure to the test bin, so as to adjust the gas pressure in the test bin to the preset gas pressure interval corresponding to the positive pressure mode.

2. The air containment detection system of claim 1, wherein, The air tightness detection system further comprises a temperature control assembly and a temperature sensor, the temperature sensor is arranged between the temperature control assembly and the test bin, and the preset gas parameter interval comprises a preset temperature interval; In a case where a gas temperature of the test bin detected by the temperature sensor is located outside the preset temperature interval, the host computer is configured to control the temperature control assembly to adjust the gas temperature of the test bin to the preset temperature interval.

3. The air containment detection system of claim 1, wherein, The air tightness detection system further comprises a pressure stabilizing assembly, and the pressure stabilizing assembly is arranged between the gas source and the pressure regulating valve; The host computer is configured to control the pressure stabilizing assembly to stabilize a gas pressure of gas provided by the gas source, and to control the pressure regulating valve to adjust the gas pressure of the gas after the stabilization to a preset gas pressure interval corresponding to the positive pressure mode.

4. The air containment detection system of claim 1, wherein, The pressure regulating assembly comprises a pressure regulating valve and a gas extraction device, and the pressure regulating valve is connected with 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 air extraction device to perform vacuumization on the test chamber to adjust the air pressure in the test chamber to a preset air pressure interval corresponding to the negative pressure mode when the air pressure of the pressure regulating valve is in the preset air pressure interval corresponding to the negative pressure mode.

5. The leak detection system of claim 1 or 2, wherein, The calibration gas parameters include calibration air pressure and calibration air temperature, and the target gas parameters include target air pressure and target air temperature. The host computer is configured to determine an absolute value of a temperature difference between the calibration air temperature and the target air temperature. When the absolute value is greater than or equal to a preset temperature difference, the host computer is configured to determine a leakage compensation amount according to the absolute value, and determine the air tightness detection result of the battery based on the leakage compensation amount and an air pressure difference between the target air pressure and the calibration air pressure. When the absolute value is less than the preset temperature difference, the host computer is configured to determine the air tightness detection result of the battery based on the air pressure difference between the target air pressure and the calibration air pressure.

6. A method of leak detection, characterized in that, The method is applied to the host computer in the air tightness detection system of any one of claims 1-5, and the method comprises: When the time length of the battery entering the test chamber from the calibration chamber in the air tightness detection system is greater than or equal to a preset time length, the target gas parameters of the battery in the test chamber are obtained; the gas parameters in the test chamber are in a preset gas parameter interval, and the air pressure in the test chamber is not equal to the air pressure in the calibration chamber; The air tightness detection result of the battery is determined according to the target gas parameters and calibration gas parameters of the battery; the calibration gas parameters are the gas parameters of the battery in the calibration chamber, which are obtained when the calibration is completed; the calibration completion condition includes that the time length of the battery entering the calibration chamber reaches a preset value, or the air pressure comparison result of the battery entering the calibration chamber is that the absolute value of the air pressure change amount is less than a preset air pressure change amount, and the absolute value of the air temperature change amount is less than a preset air temperature change amount; the air pressure comparison result is obtained by comparing two adjacent air pressures sent by a battery management system (BMS) of the battery through the host computer, and the air temperature comparison result is obtained by comparing two adjacent air temperatures sent by the BMS through the host computer; The preset gas parameter interval includes a preset air pressure interval, and the method further comprises: An input pressure mode of the test chamber is obtained; The air tightness detection system is controlled to adjust the air pressure in the test chamber to a preset air pressure interval corresponding to the pressure mode; The control of the air tightness detection system to adjust the air pressure in the test chamber to the preset air pressure interval corresponding to the pressure mode comprises: When the pressure mode is a positive pressure mode, the air pressure of the gas provided by a gas source in the air tightness detection system is adjusted to a preset air pressure interval corresponding to the positive pressure mode by a pressure regulating valve in the pressure regulating assembly. Adjusting the gas pressure in the test chamber to the preset gas pressure range corresponding to the positive pressure mode.

7. The method of claim 6, wherein, The preset gas parameter range includes a preset temperature range, and the method further includes: In a case where the temperature of the test chamber detected by the temperature sensor in the air tightness detection system is outside the preset temperature range, controlling a temperature control component in the air tightness detection system to adjust the temperature of the test chamber to the preset temperature range.

8. The method of claim 7, wherein, The control of the pressure regulating valve in the pressure regulating assembly to adjust the gas pressure of the gas provided by the gas source in the air tightness detection system to the preset gas pressure range corresponding to the positive pressure mode includes: Controlling a pressure stabilizing assembly in the air tightness detection system to stabilize the gas pressure of the gas provided by the gas source; Controlling the pressure regulating valve to adjust the gas pressure of the stabilized gas to the preset gas pressure range corresponding to the positive pressure mode.

9. The method of claim 6, wherein, The control of the pressure regulating assembly in the air tightness detection system to adjust the gas pressure in the test chamber to the preset gas pressure range corresponding to the pressure mode includes: In a case where the pressure mode is a negative pressure mode, adjusting the gas pressure of the pressure regulating valve in the pressure regulating assembly; In a case where the gas pressure of the pressure regulating valve is in the preset gas pressure range corresponding to the negative pressure mode, controlling a gas extraction device in the pressure regulating assembly to perform vacuum extraction processing on the test chamber to adjust the gas pressure in the test chamber to the preset gas pressure range corresponding to the negative pressure mode.

10. The method of claim 6 or 7, wherein, The calibration gas parameters include calibration gas pressure and calibration gas temperature, and the target gas parameters include target gas pressure and target gas temperature. The determination of the air tightness detection result of the battery according to the target gas parameters and the calibration gas parameters of the battery includes: Determining an absolute value of a gas temperature difference between the calibration gas temperature and the target gas temperature; In a case where the absolute value is greater than or equal to a preset gas temperature difference, determining a leakage compensation amount according to the absolute value, and determining the air tightness detection result of the battery based on the leakage compensation amount and a gas pressure difference between the target gas pressure and the calibration gas pressure; In a case where the absolute value is less than the preset gas temperature difference, determining the air tightness detection result of the battery based on the gas pressure difference between the target gas pressure and the calibration gas pressure.

11. An air tightness detection device, characterized by, The device is arranged in the air tightness detection system of any one of claims 1-5, and the device includes: An acquisition module is configured to acquire target gas parameters of a battery in a test chamber in the air tightness detection system in a case where a time duration for the battery to enter the test chamber from a calibration chamber in the air tightness detection system is greater than or equal to a preset time duration; the gas parameters in the test chamber are in a preset gas parameter range, and a gas pressure in the gas parameters in the test chamber is not equal to a gas pressure in the calibration chamber; A determination module is configured to determine an air tightness detection result of the battery according to the target gas parameters and calibration gas parameters of the battery; the calibration gas parameters are the gas parameters of the battery in the calibration chamber that satisfy a calibration completion condition. The calibration completion condition is met when the battery is in the calibration chamber for a preset time length, or the absolute value of a pressure change of the battery in the calibration chamber is less than a preset pressure change, and the absolute value of a temperature change of the battery in the calibration chamber is less than a preset temperature change; the pressure comparison result is obtained by comparing two adjacent pressures sent by a battery management system (BMS) of the battery to the host computer, and the temperature comparison result is obtained by comparing two adjacent temperatures sent by the BMS to the host computer; The preset gas parameter interval includes a preset pressure interval, and the device further includes: A control module configured to obtain an input pressure mode of the test chamber, and control a pressure regulating component in the airtightness detection system to adjust the pressure in the test chamber to a preset pressure interval corresponding to the pressure mode. The control module is specifically configured to, 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 interval corresponding to the positive pressure mode, and deliver the gas with the adjusted pressure to the test chamber to adjust the pressure in the test chamber to the preset pressure interval corresponding to the positive pressure mode.

12. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to implement the steps of the method of any one of claims 6 to 10.

13. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method of any one of claims 6 to 10.

14. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method of any one of claims 6 to 10. The computer program is executed by the processor to implement the steps of the method of any one of claims 6 to 10.

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