Battery testing apparatus and testing methods

Abstract

This application discloses a battery testing device and a testing method. The battery testing device is used to test a battery (100). The battery (100) includes a battery management system (104). The battery management system (104) is configured to be woken up when the internal air pressure change of the battery (100) reaches the trigger condition. The battery testing device includes: a wake-up test component (1), including a first test system (11), which is configured to receive wake-up status information sent by the battery management system (104); and an airtightness test component (2), which is configured to test the airtightness index of the battery (100). The wake-up test component (1) is configured to perform a wake-up test during the inflation cycle of the airtightness test component (2) performing the airtightness test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery testing, in particular to a battery testing device and a testing method. BACKGROUND

[0002] With the advantages of high energy density, high power density, multiple cycle times, long storage time, etc., batteries such as lithium-ion batteries have been widely used in electric vehicles.

[0003] The battery may have thermal runaway during use, and therefore a gas pressure monitoring component is provided to monitor the internal gas pressure of the battery. How to test whether the gas pressure monitoring function can work normally before the battery is shipped is the basis for ensuring the safe use of the battery. SUMMARY

[0004] The present application provides a battery testing device and a testing method, which can efficiently test whether the gas pressure monitoring function of the battery is normal.

[0005] According to a first aspect of the present application, a battery testing device is provided for testing a battery, the battery comprising a battery management system configured to be woken up when a change in the internal gas pressure of the battery reaches a trigger condition, the battery testing device comprising:

[0006] a wake-up testing component comprising a first testing system configured to receive wake-up state information sent by the battery management system; and

[0007] a gas tightness testing component configured to test the gas tightness index of the battery;

[0008] The wake-up testing component is configured to perform the wake-up test during a gas filling period of the gas tightness testing.

[0009] This embodiment performs the gas tightness test and the wake-up test in the same gas filling period, which can complete the gas tightness test and the wake-up test in one gas filling process, saves the process of additional gas filling for the wake-up test, speeds up the testing rhythm before the battery is shipped, thereby improving the overall testing efficiency of the battery, reducing the testing station requirement, and reducing the setting cost of the testing device. Moreover, the gas tightness test is performed in the pressure stabilizing stage of the gas filling period, and the wake-up test is performed in the pressure rising stage of the gas filling period, which can ensure that the change in the internal gas pressure of the battery reaches the trigger condition and improve the success rate of the wake-up test.

[0010] In some embodiments, the gas tightness testing component comprises a second testing system, the first testing system and the second testing system are interactively connected, and one of the first testing system and the second testing system is configured to stop testing when receiving fault information sent by the other.

[0011] The embodiment indicates that the wake-up test or the air tightness test fails, and the performance of the battery does not meet the requirements when one of the first test system and the second test system sends the fault information, and the test is stopped, which can improve the overall test efficiency of the battery.

[0012] In some embodiments, the battery further comprises a pressure detection component configured to detect the internal pressure of the battery and send a wake-up trigger signal to the battery management system when the pressure change condition reaches a trigger condition.

[0013] The first test system is configured to receive a preset test trigger condition input from outside before the wake-up test, and send the preset test trigger condition to the pressure detection component through the battery management system to set the trigger condition of the pressure detection component as the preset test trigger condition, which is lower than the preset factory trigger condition of the battery.

[0014] The embodiment reduces the trigger condition of the pressure detection component during the wake-up test through software calibration, which can reduce the power-on waiting time after the start of the wake-up test, reduce the test rhythm, reduce the test time in the electrical performance test station, and reduce the number of test devices. Moreover, by reducing the trigger condition, the air pressure required for the wake-up test is significantly lower than that required for the air tightness test, which is beneficial for the wake-up test in the pressure rising stage in the inflation period. Even if the wake-up test takes a certain amount of time, the battery management system can be awakened, thereby improving the pass rate of the wake-up test.

[0015] In some embodiments, the first test system is configured to read the trigger condition of the pressure detection component through the battery management system after setting the preset test trigger condition, and send state information indicating that the test trigger condition setting is successful when the read trigger condition is consistent with the preset test trigger condition.

[0016] The embodiment reads again after setting the preset test trigger condition, and determines whether the preset test trigger condition is set successfully by comparison, which can improve the accuracy of the wake-up test.

[0017] In some embodiments, the first test system is configured to receive a preset factory trigger condition input from outside when the wake-up state information is wake-up successful, and send the preset factory trigger condition to the pressure detection component through the battery management system to set the trigger condition of the pressure detection component as the preset factory trigger condition.

[0018] The embodiment can restore the trigger condition of the pressure detection component to the preset factory trigger condition through software after the completion of the wake-up test, so as to meet the needs of users and ensure that the battery wakes up the battery management system according to the preset factory trigger condition when thermal runaway occurs.

[0019] In some embodiments, the first test system is configured to read the trigger condition of the pressure detection component through the battery management system after setting the preset factory trigger condition, and send state information indicating that the setting of the factory trigger condition is successful if the read trigger condition is consistent with the preset factory trigger condition input externally.

[0020] In this embodiment, after the wake-up test is passed, the preset factory trigger condition is read again, and it is determined whether the preset factory trigger condition is set successfully by comparison, which can improve the accuracy of setting the trigger condition of the pressure detection component in the battery product and ensure that the battery meets the user's needs.

[0021] In some embodiments, the airtightness test assembly includes a second test system, and the inflation cycle is a positive pressure inflation cycle or a negative pressure inflation cycle.

[0022] The positive pressure inflation cycle includes, in sequence, a first pressure increasing stage, a first pressure stabilizing stage, and a first pressure decreasing stage, the first test system is configured to perform a wake-up test in the first pressure increasing stage, and the second test system is configured to perform an airtightness test in the first pressure stabilizing stage; and / or

[0023] The negative pressure inflation cycle includes, in sequence, a second pressure decreasing stage, a second pressure stabilizing stage, and a second pressure increasing stage, the second test system is configured to perform an airtightness test in the second pressure stabilizing stage, and the first test system is configured to perform a wake-up test in the second pressure increasing stage.

[0024] In some embodiments, the battery further includes a pressure detection component configured to detect the internal pressure of the battery and send a wake-up trigger signal to the battery management system if the pressure change condition reaches a trigger condition.

[0025] If the inflation cycle is a positive pressure inflation cycle, the first test system is configured to set the trigger condition of the pressure detection component to a preset test trigger condition before the start of the first pressure increasing stage, and / or

[0026] If the inflation cycle is a negative pressure inflation cycle, the first test system is configured to set the trigger condition of the pressure detection component to a preset test trigger condition in the second pressure stabilizing stage.

[0027] The preset test trigger condition is lower than the preset factory trigger condition of the battery.

[0028] In some embodiments, the preset test trigger condition is set at a first time, and the battery management system is awakened at a second time, and the difference between the second time and the first time is not more than a preset time.

[0029] In some embodiments, the wake-up test assembly further comprises a test connector configured to interface with the battery connector, and the first test system is electrically connected to the test connector and configured to receive the wake-up state information sent by the battery management system.

[0030] In some embodiments, the wake-up test assembly further comprises a sealing structure arranged on the test connector and configured to seal the test connector and a connection position of the test connector with the battery connector.

[0031] In some embodiments, the battery test device further comprises a gas source, and the airtight test assembly comprises:

[0032] a test cavity and a reference cavity, each having a first port in communication with the gas source and a second port in communication with the inside of the battery;

[0033] a differential pressure detection component configured to detect a differential pressure between the test cavity and the reference cavity; and

[0034] a second test system configured to receive the differential pressure signal to obtain the airtightness index.

[0035] According to a second aspect of the present application, a battery test method is provided, comprising:

[0036] testing the airtightness index of the battery by the airtight test assembly;

[0037] during an inflation period of the airtight test by the airtight test assembly, performing a wake-up test by the wake-up test assembly, in which the battery management system arranged in the battery is woken up when the internal pressure change condition of the battery reaches a triggering condition, and the first test system of the wake-up test assembly receives the wake-up state information sent by the battery management system.

[0038] In some embodiments, the airtight test assembly comprises a second test system, and the battery test method further comprises:

[0039] stopping one of the first test system and the second test system from testing when the other one sends a fault information.

[0040] In some embodiments, the battery further comprises a pressure detection component configured to detect the internal pressure of the battery and send a wake-up triggering signal to the battery management system when the internal pressure change condition reaches a triggering condition, and the battery test method further comprises:

[0041] before the wake-up test, causing the first test system to receive a preset test triggering condition input from outside and send it to the pressure detection component through the battery management system to set the triggering condition of the pressure detection component as the preset test triggering condition, which is lower than a preset factory triggering condition of the battery.

[0042] In some embodiments, the battery testing method further comprises:

[0043] After setting the preset test trigger condition, the first testing system reads the trigger condition of the pressure detection component through the battery management system;

[0044] In the case that the read trigger condition is consistent with the preset test trigger condition, the first testing system sends state information indicating that the test trigger condition setting is successful.

[0045] In some embodiments, the battery testing method further comprises:

[0046] In the case that the wake-up state information is wake-up successful, the first testing system receives an externally input preset factory trigger condition and sends it to the pressure detection component through the battery management system, so as to set the trigger condition of the pressure detection component to the preset factory trigger condition.

[0047] In some embodiments, the battery testing method further comprises:

[0048] After setting the preset factory trigger condition, the first testing system reads the trigger condition of the pressure detection component through the battery management system;

[0049] In the case that the read trigger condition is consistent with the externally input preset factory trigger condition, the first testing system sends state information indicating that the factory trigger condition setting is successful.

[0050] In some embodiments, during the inflation period of the air tightness test assembly for air tightness test, the wake-up test by the wake-up test assembly comprises:

[0051] If the inflation period is a positive pressure inflation period and sequentially comprises a first pressure increasing stage, a first pressure stabilizing stage and a first pressure decreasing stage, the wake-up test is performed in the first pressure increasing stage and the air tightness test is performed in the first pressure stabilizing stage; and / or

[0052] If the inflation period is a negative pressure inflation period and sequentially comprises a second pressure decreasing stage, a second pressure stabilizing stage and a second pressure increasing stage, the air tightness test is performed in the second pressure stabilizing stage and the wake-up test is performed in the second pressure increasing stage.

[0053] In some embodiments, before the wake-up test, the battery testing method further comprises:

[0054] If the inflation period is a positive pressure inflation period, the trigger condition of the pressure detection component is set to the preset test trigger condition before the first pressure increasing stage starts, and / or

[0055] If the inflation period is a negative pressure inflation period, the trigger condition of the pressure detection component is set to the preset test trigger condition in the second pressure stabilizing stage;

[0056] The preset test trigger condition is lower than a preset factory trigger condition of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0057] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0058] Figure 1 An exploded view of some embodiments of the battery of the present application.

[0059] Figure 2 A structural schematic view of some embodiments of the battery testing device of the present application.

[0060] Figure 3 A schematic view of the connection relationship between the first testing system and the second testing system.

[0061] Figure 4 A schematic view of the air pressure curve in the inflation period.

[0062] Figure 5 A structural schematic view of some embodiments of the wake-up testing assembly.

[0063] Figure 6 A schematic view of the pressure detection component testing mode calibration interface.

[0064] Figure 7 A flowchart of the pressure detection component testing mode calibration method.

[0065] Figure 8 A schematic view of the pressure detection component factory mode calibration interface.

[0066] Figure 9 A flowchart of the pressure detection component factory mode calibration method.

[0067] Figure 10 A flowchart of some embodiments of the battery testing method of the present application.

[0068] Figure 11 A flowchart of some other embodiments of the battery testing method of the present application.

[0069] In the drawings, the drawings are not drawn according to the actual scale.

[0070] Label Explanation:

[0071] 100, battery; 101, shell assembly; 102, battery module; 101A, box body; 101B, cover body; 103, pressure detection component; 104, battery management system; 105, battery joint; 10, battery monomer;

[0072] 1. Wake-up test assembly; 11. First test system; 12. Test joint; 13. Sealing structure; 14. Multifunctional communication component;

[0073] 2. Air-tight test assembly; 21. Second test system; 22. Test chamber; 23. Reference chamber; 24. Differential pressure detection component;

[0074] 3. Air source;

[0075] x, first direction; y, second direction; z, third direction; P, positive pressure inflation cycle; P1, first pressure increasing stage;

[0076] P2, first pressure stabilizing stage; P3, first pressure decreasing stage; N, negative pressure inflation cycle; N1, second pressure decreasing stage; N2, second pressure stabilizing stage; N3, second pressure increasing stage. DETAILED DESCRIPTION

[0077] The embodiments of the present application will be further described in conjunction with the drawings and examples. The detailed description and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described examples.

[0078] In the description of the present application, it is necessary to point out that, unless otherwise specified, the meaning of "a plurality of" is more than two; the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0079] In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. The orientation words appearing in the following description are the directions shown in the drawings, and are not a limitation on the specific structure of the present application.

[0080] In the description of the present application, it is also necessary to point out that, unless otherwise specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] 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 the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a particular embodiment that is “independent” or“alternative” to all other embodiments. It will be explicitly understood that the embodiments described herein can be combined with each other in their various aspects.

[0082] In the description of embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, the term“a plurality of groups” refers to two or more groups (including two groups), and the term“a plurality of pieces” refers to two or more pieces (including two pieces).

[0083] In the description of embodiments of the application, the terms“upper”,“lower”,“top”,“bottom”,“front”,“back”,“inner”, and“outer” and other directional or positional relationship descriptions are used only to facilitate the description of the application, and are not intended to indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0084] The battery referred to in the embodiments of the application refers to a single physical module comprising a plurality of battery cells to provide higher voltage and capacity. For example, the battery referred to in the application can include a battery module or a battery pack, etc.

[0085] The battery cell referred to in the embodiments of the application can include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which is not limited by the embodiments of the application. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc., which is also not limited by the embodiments of the application. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, which is also not limited by the embodiments of the application.

[0086] The battery testing device of the application is used to test the performance of the battery after it is assembled to verify whether the functions of the key components in the battery are normal or whether the performance of the battery meets the requirements, and the battery is only shipped out when the test requirements are met. The testing link can improve the reliability and safety of the battery during use. In order to more clearly describe the battery testing device later, the structure of the battery will be described first.

[0087] Figure 1As a structural schematic diagram of some embodiments of the battery 100, the battery 100 can include a housing assembly 101 and at least one battery module 102. The battery module 102 includes a plurality of battery cells 10 arranged side by side along a first direction x, and the plurality of battery cells 10 can be connected in series, in parallel, or in a hybrid connection (i.e., a mixture of series and parallel connections) with each other. According to the power supply requirement, the battery module 102 can be arranged in multiple along a second direction y perpendicular to the first direction x, and the plurality of battery modules 102 can also be connected in series, in parallel, or in a hybrid connection with each other.

[0088] The housing assembly 101 is a hollow structure, and the at least one battery module 102 is accommodated in the housing assembly 101. For example, the housing assembly 101 can include a box body 101A and a cover body 101B. The box body 101A and the cover body 101B are buckled together along a third direction z perpendicular to the first direction x and the second direction y. For example, the box body 101A and the cover body 101B can each be a hollow cuboid and have only one face as an opening face. The opening of the box body 101A and the opening of the cover body 101B are oppositely arranged, and the box body 101A and the cover body 101B are buckled together to form a box with a closed cavity. Alternatively, the box body 101A can be a cuboid with an opening, and the cover body 101B can be a plate; or the cover body 101B can be a cuboid with an opening, and the box body 101A can be a plate. The box body 101A and the cover body 101B are oppositely arranged and buckled together to form a box with a closed cavity. The at least one battery module 102 is combined in parallel, in series, or in a hybrid connection with each other and is placed in the closed cavity formed by the buckling of the box body 101A and the cover body 101B.

[0089] When the battery cell 10 experiences thermal runaway, the sparks and hot air ejected from the battery cell 10 can be ejected through the explosion-proof valve of the battery cell 10 and spread in the housing assembly 101. Due to the closed cavity of the housing assembly 101, the air pressure in the housing assembly 101 can rapidly increase. In order to prevent the air pressure from increasing to a certain extent to cause safety hazards, such as the explosion of the battery 100, the battery 100 further includes a pressure detection component 103 (Battery pressure sensor, BPS for short) and a battery management system 104 (Battery Management System, BMS for short). Figure 2

[0090] ​The pressure detection component 103 is configured to detect the internal pressure of the battery 100 and send a wake-up trigger signal to the battery management system 104 when the internal pressure change condition reaches the trigger condition. The pressure detection component 103 detects the air pressure when the battery 100 is powered and in communication. The battery management system 104 is configured to be woken up from the sleep mode when the internal pressure change condition of the battery 100 reaches the trigger condition, i.e., when the wake-up trigger signal is received. This process is called reverse wake-up. After being woken up, the battery management system 104 starts receiving the detection signal from the pressure detection component 103 and performs fault monitoring to take safety measures such as alarm or stopping the battery 100 from working when a fault occurs.

[0091] In some embodiments, the trigger condition is a preset factory trigger condition during use of the battery 100. The trigger condition includes at least two types. One is that the internal pressure change condition of the battery 100 is the air pressure change amount, and the air pressure change amount exceeds the preset pressure difference threshold value. For example, the preset pressure difference threshold value can be 3 kPa, which can be set according to user requirements. The other is that the internal pressure change condition of the battery 100 is the air pressure change rate, and the air pressure change rate exceeds the preset pressure difference change rate threshold value for a preset number of times. For example, the preset pressure difference change rate threshold value can be 0.5 kPa / s, and the preset number of times can be 1, 2 or more.

[0092] To ensure that the air pressure monitoring function in the battery 100 can be used normally, the wake-up function needs to be tested before the battery 100 is shipped to verify whether the communication connection and interaction logic between the pressure detection component 103 and the battery management system 104 are normal.

[0093] Currently, when the battery 100 is tested for wake-up, the battery 100 needs to be inflated first. If the battery management system 104 can be woken up when the internal pressure change condition reaches the trigger condition, the test is passed.

[0094] The inventors have found in practice that the current wake-up test scheme takes a long time to test, and one test takes nearly 300 s. If the test efficiency needs to be improved, the number of wake-up test systems needs to be increased, which greatly increases the cost investment. Moreover, in order to reach the trigger condition, the inflation time is also long, resulting in a long test time, especially when the battery 100 is large in size, which requires a longer time. In addition, during the time when the battery 100 is powered on, a small amount of gas leaks, resulting in that the pressure difference value read during the inflation stage may not be able to reach the wake-up condition, so that the one-time test pass rate of the product is low.

[0095] Based on the above problems, the inventors want to improve the wake-up test efficiency of the battery.

[0096] In some embodiments, as shown in FIG. 1, the battery 100 includes a pressure detection component 103 and a battery management system 104. The pressure detection component 103 is configured to detect the internal pressure of the battery 100 and send a wake-up trigger signal to the battery management system 104 when the internal pressure change condition reaches the trigger condition. The pressure detection component 103 detects the air pressure when the battery 100 is powered and in communication. The battery management system 104 is configured to be woken up from the sleep mode when the internal pressure change condition of the battery 100 reaches the trigger condition, i.e., when the wake-up trigger signal is received. This process is called reverse wake-up. After being woken up, the battery management system 104 starts receiving the detection signal from the pressure detection component 103 and performs fault monitoring to take safety measures such as alarm or stopping the battery 100 from working when a fault occurs. Figure 2As shown, the battery testing device is used for testing the battery 100 and includes a wake-up test assembly 1 and a gas tightness test assembly 2. The wake-up test assembly 1 includes a first test system 11 configured to receive wake-up state information sent by the battery management system 104, the wake-up state information including information of wake-up success and wake-up failure. The gas tightness test assembly 2 is configured to test the gas tightness index of the battery 100. The wake-up test assembly 1 is configured to perform the wake-up test during the inflation period of the gas tightness test performed by the gas tightness test assembly 2.

[0097] The first test system 11 can be a host computer, which can receive the wake-up state information and display it in a human-computer interaction interface, and can also receive pressure or pressure difference information sent by the battery management system 104 for real-time display, so that the operator can intuitively understand the gas pressure change in the battery 100. The human-computer interaction interface of the first test system 11 can also set a parameter setting interface for the operator to set wake-up test related parameters.

[0098] The gas tightness index is the internal gas leakage amount of the battery 100 within a preset time when the inflation is kept in a stable pressure state.

[0099] The inflation period is the entire period from the beginning of inflating gas into the battery 100 to the completion of deflation. When performing the gas tightness test, in order to better verify the sealing performance of the shell assembly 101, positive pressure inflation and negative pressure inflation tests can be performed. The inflation period can be a positive pressure inflation period or a negative pressure inflation period. In the positive pressure inflation period, positive pressure gas is inflated, and in the negative pressure inflation period, negative pressure gas is inflated.

[0100] The wake-up test assembly 1 performs the wake-up test during the inflation period of the gas tightness test performed by the gas tightness test assembly 2. The wake-up test is performed in the positive pressure inflation period and the negative pressure inflation period, respectively. Generally, in one inflation period, the absolute value of the gas pressure change of the gas tightness test is greater than the absolute value of the gas pressure change of the wake-up test. The gas tightness test can be performed in the stable pressure stage, and the wake-up test can be performed in the pressure rising stage.

[0101] This embodiment performs the gas tightness test and the wake-up test in the same inflation period, which can complete the gas tightness test and the wake-up test in one inflation process, saves the process of additional inflation for the wake-up test, accelerates the test rhythm before the battery 100 leaves the factory, improves the overall test efficiency of the battery, reduces the test station demand, and reduces the setting cost of the testing device. Moreover, the gas tightness test is performed in the stable pressure stage of the inflation period, and the wake-up test is performed in the pressure rising stage of the inflation period, which can ensure that the gas pressure change in the battery 100 reaches the triggering condition and improves the success rate of the wake-up test.

[0102] In some embodiments, the airtight test assembly 2 comprises a second test system 21, the first test system 11 and the second test system 21 are connected interactively, and one of the first test system 11 and the second test system 21 is configured to stop the test upon receiving the failure information sent by the other.

[0103] The second test system 21 can be a host computer, which can receive the air pressure change condition in the battery 100 and display it in a human-computer interaction interface, so that the operator can intuitively understand the air pressure change condition in the battery 100 and the airtightness index. The human-computer interaction interface of the second test system 21 can also set a parameter setting interface for the operator to set the wake-up test related parameters. Alternatively, the first test system 11 and the second test system 21 can be independently set, or can also be integrated to simplify the complexity of the battery test device.

[0104] The interactive connection between the first test system 11 and the second test system 21 means that they can send information to each other, which can be sent through wired or wireless means. If a wired method is used, the first test system 11 and the second test system 21 can be connected through a hard wire or a bus.

[0105] The embodiment stops the test when one of the first test system 11 and the second test system 21 sends the failure information, indicating that the wake-up test or the airtightness test fails, indicating that the performance of the battery 100 does not meet the requirements. At this time, stopping the test can improve the overall test efficiency of the battery 100.

[0106] Alternatively, the interactive connection between the first test system 11 and the second test system 21 can also be signal interaction of the start time of the wake-up test assembly 1 and the airtight test assembly 2, for example, the wake-up test assembly 1 and the airtight test assembly 2 can be started simultaneously or sequentially.

[0107] In some embodiments, the battery 100 further comprises a pressure detection component 103 configured to detect the internal pressure of the battery 100 and send a wake-up trigger signal to the battery management system 104 when the air pressure change condition reaches a trigger condition. The first test system 11 is configured to receive a preset test trigger condition input externally before the wake-up test, and send it to the pressure detection component 103 through the battery management system 104, so as to set the trigger condition of the pressure detection component 103 as the preset test trigger condition, which is lower than the preset factory trigger condition of the battery 100. Setting the trigger condition needs to be carried out when the air pressure in the battery 100 is stable.

[0108] The pressure detection component 103 includes a pressure detection element configured to detect the pressure inside the battery 100 and a controller configured to calculate the pressure change in the battery 100 since the power-on of the pressure detection component 103 and send a wake-up trigger signal to the battery management system 104 or send the pressure change to the first test system 11 through the battery management system 104 for monitoring when the pressure change reaches a trigger condition.

[0109] The controller is further configured to set the trigger condition of the pressure detection component 103 after receiving a preset test trigger condition or a preset factory trigger condition through the battery management system 104. The preset test trigger condition is a trigger condition set for the wake-up test, for example, setting a preset pressure difference threshold of 1 kPa as the preset test trigger condition; and the preset factory trigger condition is a trigger condition set for the wake-up function of the battery product, for example, setting a preset pressure difference threshold of 3 kPa as the preset factory trigger condition.

[0110] Setting the trigger condition of the pressure detection component 103 through the battery management system 104 can also test whether the communication connection and interaction logic between the pressure detection component 103 and the battery management system 104 are normal compared with directly setting the trigger condition of the pressure detection component 103.

[0111] For example, the trigger condition is that the pressure change exceeds the preset pressure difference threshold, the preset pressure difference threshold is reduced from 3 kPa to 1 kPa, and the power-on waiting time is reduced from 120 s to 20 s. Reducing the preset pressure difference threshold can not only reduce the test tempo, but also maintain a suitable inflation speed to prevent the shell assembly 101 of the battery 100 from deforming due to too fast inflation.

[0112] The embodiment can reduce the power-on waiting time after the start of the wake-up test by reducing the trigger condition of the pressure detection component 103 through software calibration, reduce the test tempo, reduce the test time in the electrical performance test station, and reduce the number of test devices. Moreover, by reducing the trigger condition, the pressure required for the wake-up test is significantly lower than the pressure required for the air tightness test, which is beneficial for the wake-up test in the pressure rising stage of the inflation period. Even if the wake-up test takes a certain amount of time, the battery management system 104 can be woken up, thereby improving the pass rate of the wake-up test.

[0113] Although the trigger condition of the pressure detection component 103 is reduced during the wake-up test, the wake-up test only verifies the communication connection and interaction logic of the pressure detection component 103 and the battery management system 104, and the size of the trigger condition does not affect the wake-up test result.

[0114] In some embodiments, the first test system 11 is configured to read the trigger condition of the pressure detection component 103 through the battery management system 104 after setting the preset test trigger condition, and send state information indicating that the test trigger condition setting is successful if the read trigger condition is consistent with the preset test trigger condition.

[0115] In this embodiment, the first test system 11 reads the trigger condition of the pressure detection component 103 through the battery management system 104, which can test whether the communication connection and interaction logic between the pressure detection component 103 and the battery management system 104 are normal compared with the direct reading mode. After reading the trigger condition of the pressure detection component 103, the first test system 11 compares the read trigger condition with the preset test trigger condition, and sends state information indicating that the test trigger condition setting is successful if the read trigger condition is consistent with the preset test trigger condition, and sends information indicating that the test trigger condition setting fails if the read trigger condition is inconsistent with the preset test trigger condition.

[0116] In this embodiment, the first test system 11 reads the trigger condition of the pressure detection component 103 through the battery management system 104, which can test whether the communication connection and interaction logic between the pressure detection component 103 and the battery management system 104 are normal compared with the direct reading mode. After reading the trigger condition of the pressure detection component 103, the first test system 11 compares the read trigger condition with the preset test trigger condition, and sends state information indicating that the test trigger condition setting is successful if the read trigger condition is consistent with the preset test trigger condition, and sends information indicating that the test trigger condition setting fails if the read trigger condition is inconsistent with the preset test trigger condition.

[0117] In some embodiments, the first test system 11 is configured to receive the preset factory trigger condition input by the external device and send the preset factory trigger condition to the pressure detection component 103 through the battery management system 104 to set the trigger condition of the pressure detection component 103 as the preset factory trigger condition if the wake-up state information is wake-up successful.

[0118] In this embodiment, the preset factory trigger condition can be set according to the user's requirements, for example, can include at least one of the following conditions: the air pressure change amount exceeds the preset pressure difference threshold, and the air pressure change rate exceeds the preset pressure difference change rate threshold for a preset number of times.

[0119] In this embodiment, the trigger condition of the pressure detection component 103 can be restored to the preset factory trigger condition through software after the wake-up test is completed, so as to meet the user's requirements and ensure that the battery 100 wakes up the battery management system 104 according to the preset factory trigger condition when thermal runaway occurs.

[0120] In some embodiments, the first test system 11 is configured to read the trigger condition of the pressure detection component 103 through the battery management system 104 after setting the preset factory trigger condition, and send state information indicating that the test trigger condition setting is successful if the read trigger condition is consistent with the preset test trigger condition.

[0121] The first test system 11 reads the trigger conditions of the pressure detection component 103 through the battery management system 104. Compared with direct reading, this method can also test whether the communication connection and interaction logic between the pressure detection component 103 and the battery management system 104 are normal. After reading the trigger conditions of the pressure detection component 103, the first test system 11 compares the read trigger conditions with the preset factory trigger conditions. If they match, it issues a status message indicating that the factory trigger condition setting is successful; otherwise, it issues a status message indicating that the factory trigger condition setting has failed.

[0122] After the wake-up test is passed, this embodiment reads the preset factory trigger conditions again and compares them to determine whether the preset factory trigger conditions are set successfully. This can improve the accuracy of the trigger condition setting of the pressure detection component 103 in the battery product and ensure that the battery 100 meets the user's needs.

[0123] In some embodiments, such as Figure 4 As shown, the airtightness test component 2 includes a second test system 21, and the inflation cycle is a positive pressure inflation cycle P or a negative pressure inflation cycle N.

[0124] The positive pressure inflation cycle P includes, from the start of inflation, the following phases in sequence: first pressure increase phase P1, first pressure stabilization phase P2, and first pressure decrease phase P3. The first test system 11 is configured to perform a wake-up test during the first pressure increase phase P1, and the second test system 21 is configured to perform an airtightness test during the first pressure stabilization phase P2.

[0125] In the first pressurization stage P1, positive pressure gas is gradually introduced into the battery 100 from zero pressure, so that the pressure curve rises at a certain slope; in the first pressure stabilization stage P2, the pressure curve remains horizontal for a period of time; in the first pressure reduction stage P3, positive pressure gas is gradually released, so that the pressure curve drops to zero at a certain slope.

[0126] The wake-up test needs to be carried out during the gradual increase of air pressure. The wake-up test can be carried out at time T1 when the air pressure curve is in the first pressurization stage P1, that is, the battery management system 4 is woken up at time T1. Since the preset pressure difference threshold is lower than the pressure difference required for the air tightness test, the wake-up test can be completed during the inflation and pressurization process. This can prevent a small amount of battery leakage from affecting the test pass rate, thereby improving the success rate of the wake-up test.

[0127] The negative pressure inflation cycle N includes, from the start of inflation, the following phases in sequence: second depressurization phase N1, second pressure stabilization phase N2, and second pressure increase phase N3. The second test system 21 is configured to perform an airtightness test during the second pressure stabilization phase N2, and the first test system 11 is configured to perform a wake-up test during the second pressure increase phase N3.

[0128] In the second pressure decreasing stage N1, the negative pressure gas is gradually filled into the battery 100 from zero, so that the air pressure curve decreases at a certain slope; in the second pressure maintaining stage N2, the air pressure curve remains horizontal for a period of time; in the second pressure increasing stage N3, the negative pressure gas is gradually released, so that the air pressure curve increases at a certain slope to zero.

[0129] The wake-up test needs to be performed in the process of gradually increasing air pressure, and can be performed at the moment T3 when the air pressure curve is in the second pressure increasing stage N3. Since the preset pressure difference threshold is lower than the pressure difference required by the air tightness test, the wake-up test can be completed in the process of releasing the negative pressure gas to increase the pressure, which can prevent a small amount of battery leakage from affecting the test pass rate, thereby improving the success rate of the wake-up test.

[0130] The embodiment can better verify the sealing performance of the shell assembly 101 by the positive pressure filling cycle P and the negative pressure filling cycle N. Moreover, for the positive pressure filling cycle P or the negative pressure filling cycle N, the wake-up test can be completed in the filling cycle of the air tightness test. Moreover, the wake-up test can be performed in a suitable stage in the filling cycle according to the requirement of the pressure change trend, and the time sequence and timing of the wake-up test and the air tightness test are reasonably arranged, so that the two tests can be reliably completed in the same filling cycle.

[0131] In some embodiments, the timing of setting the trigger condition of the pressure detection component 103 is as follows:

[0132] If the filling cycle is the positive pressure filling cycle P, the first test system 11 is configured to set the trigger condition of the pressure detection component 103 to the preset test trigger condition before the start of the first pressure increasing stage P1, so as to ensure that the wake-up test can be performed according to the preset test trigger condition in the first pressure increasing stage P1.

[0133] If the filling cycle is the negative pressure filling cycle N, the first test system 11 is configured to set the trigger condition of the pressure detection component 103 to the preset test trigger condition in the second pressure maintaining stage N2, so as to ensure that the wake-up test can be performed according to the preset test trigger condition in the second pressure increasing stage N3. The preset test trigger condition is lower than the preset factory trigger condition of the battery 100.

[0134] The embodiment can ensure that the wake-up test is performed according to the preset test trigger condition in the pressure increasing stage by setting the trigger condition of the pressure detection component 103 at a suitable timing in the filling cycle.

[0135] In some embodiments, the setting moment of the preset test trigger condition is the first moment, the moment when the battery management system 104 is awakened is the second moment, and the difference between the second moment and the first moment is not more than a preset time. For example, the preset time can be 120s.

[0136] For example, in the negative pressure inflation cycle N, the first time is T2, and the second time is T3. The time interval between T3 and T2 does not exceed the preset time. In order to trigger the wake-up at T3, T2 can be set in the second half of the second stable pressure stage N2.

[0137] The embodiment can set the preset test trigger condition and the time interval of triggering the wake-up to meet the requirements, shorten the time required from setting the preset test trigger condition to triggering the wake-up, reduce the time required for a single wake-up test, and improve the test efficiency.

[0138] In some embodiments, the battery 100 further includes a battery connector 105, which is a connector on the product and can be arranged on the housing assembly 101. As shown in Figure 4 The wake-up test assembly 1 further includes a test connector 12 configured to be connected with the battery connector 105. The first test system 11 is electrically connected with the test connector 12 and configured to receive the wake-up state information sent by the battery management system 104. Optionally, the first test system 11 can also receive the air pressure information or other state information sent by the battery management system 104.

[0139] The test connector 12 can lead five wires, including two communication lines SCAN-H and SCAN-L, a wake-up state signal line keyon, a power supply line, and a ground line. Among them, the communication lines are used for signal interaction with the second test system 21; the wake-up state signal line is used to transmit the wake-up state information sent by the battery management system 104 to the first test system 11. When the battery management system 104 is in sleep, the wake-up state signal line has no signal, and when the battery management system 104 is woken up, the wake-up state signal line has a pressure signal, for example, 12V; the power supply line can provide 12V voltage.

[0140] The wake-up test assembly 1 can further include a multifunctional communication component 14 connected between the test connector 12 and the first test system 11 and configured to convert different signals output by the battery 100 into a unified format. Different conversion modes of the multifunctional communication component can be switched in an automatic or manual manner. Such a structure can convert different battery connectors 105 into a unified interface, facilitate connection with the first test system 11, and be compatible with different circuit line designs of different test connectors 12, thereby improving the versatility of the wake-up test for different batteries 100.

[0141] The embodiment can make the first test system 11 establish a communication link with the battery management system 104 by setting the test joint 12 to be in contact with the battery joint 105, so that the first test system 11 can obtain information in the battery management system 104 and send a set parameter to the battery management system 104 to set a trigger condition of the pressure detection component 103, thereby facilitating the wake-up test.

[0142] In some embodiments, as shown in Figure 4 The battery test device further includes a sealing structure 13 arranged on the test joint 12 and configured to seal the test joint 12 and a connection position of the test joint 12 and the battery joint 105. For example, the sealing structure 13 can be a sealing ring, a sealing film, or the like.

[0143] The embodiment can prevent air leakage from the test joint 12 during the wake-up test, save the overall time required for the air tightness test and the wake-up test of the battery 100, and improve the test efficiency.

[0144] In some embodiments, as shown in Figure 2 The battery test device further includes a gas source 3, and the air tightness test assembly 2 includes a test cavity 22, a reference cavity 23, a pressure difference detection component 24, and a second test system 21. The test cavity 22 and the reference cavity 23 each have a first port in communication with the gas source 3 and a second port in communication with the inside of the battery 100. The pressure difference detection component 24 is configured to detect a pressure difference between the test cavity 22 and the reference cavity 23, and the second test system 21 is configured to receive a pressure difference signal to obtain an air tightness index.

[0145] The embodiment can maintain a stable pressure in the reference cavity 23 during the air tightness test. If the battery 100 leaks, the pressure in the test cavity 22 decreases, and the pressure difference between the test cavity 22 and the reference cavity 23 can be detected by the pressure difference detection component 24. The function of the air tightness test assembly 2 can also be realized by a valve, so that the gas leakage amount can be obtained according to the pressure difference, and thus the air tightness index can be obtained.

[0146] The method of testing by using the battery test device of the present application will be described below through a specific embodiment.

[0147] As shown in Figure 2As shown, when testing battery 100 is required, the airtightness testing component 2 is connected to the air source 3 and the air inlet of battery 100. The test connector 12 in the wake-up testing component 1 is connected to the battery connector 105, and the output end of the test connector 12 is connected to the first testing system 11 through the multi-functional conversion component 14. The first testing system 11 can be a PC or tablet computer, etc. This battery testing device is equivalent to integrating power supply and communication lines into the airtightness testing fixture based on the airtightness testing component 2, eliminating the need for repeated development of testing fixtures and testing systems. Moreover, as Figure 3 As shown, the wake-up test component 1 and the airtightness test component 2 can be tested in the time sequence and test fault status through the interaction of the first test system 11 and the second test system 21.

[0148] At the start of the test, such as Figure 4 As shown, the battery 100 needs to be inflated by the air source 3. During the entire inflation cycle, the pressure detection component 103 needs to complete the following processes: test mode calibration, reading, waiting for pressure change, wake-up test, and factory mode calibration. Test mode calibration refers to setting the trigger condition of the pressure detection component 103 to a preset test trigger condition, i.e., the pressure change exceeds a preset differential pressure threshold, for example, the preset differential pressure threshold can be 1 kPa. Factory mode calibration refers to setting the trigger condition of the pressure detection component 103 to a preset factory trigger condition, i.e., the pressure change exceeds a preset differential pressure threshold, for example, the preset differential pressure threshold can be 3 kPa.

[0149] like Figure 4 As shown, the airtightness of battery 100 can be tested by positive pressure inflation cycle P and negative pressure inflation cycle N.

[0150] The positive pressure charging cycle P, starting from the start of charging, sequentially includes: a first pressure boosting stage P1, a first pressure stabilization stage P2, and a first pressure reduction stage P3. The entire airtightness test process includes charging, pressure stabilization, testing, and venting. Specifically, the first test system 11 is configured to perform a wake-up test during the first pressure boosting stage P1, waking the battery management system 104 from its dormant state. Before the start of the first pressure boosting stage P1, the trigger condition of the pressure detection component 103 is set to a preset test trigger condition, and the current air pressure value is collected. After the wake-up test is completed, the trigger condition of the pressure detection component 103 is set to a preset factory trigger condition. After entering the first pressure stabilization stage P2, the second test system 21 performs an airtightness test on the battery 100.

[0151] The negative pressure inflation cycle N includes, in sequence from the time of starting inflation, a second pressure reduction stage N1, a second pressure stabilization stage N2, and a second pressure increase stage N3. The entire airtightness test process includes air extraction, pressure stabilization, testing, and inflation. In the second pressure reduction stage N1, no action is performed, and the second test system 21 is configured to perform airtightness testing in the second pressure stabilization stage N2. Meanwhile, the first test system 11 is configured to set the trigger condition of the pressure detection component 103 to a preset test trigger condition in the second pressure stabilization stage N2, and to collect the current air pressure value. Then, in the second pressure increase stage N3, the wake-up test is performed, and after the wake-up test passes, the trigger condition of the pressure detection component 103 is set to a preset factory trigger condition.

[0152] The pressure detection component 103 test mode calibration interface is shown in Figure 6 The interface includes a “test password” input box, a “test mode calibration” button, and a “calibration state” display box. The test mode calibration process is shown in Figure 7 After starting the pressure detection component 103 test mode calibration, the test password is first input, for example, “12345”, the “test mode calibration” button is clicked, and if “calibration success” is displayed in the “calibration state” display box, the test mode calibration is successful, and the test mode calibration is ended. If “calibration failure” is displayed in the “calibration state” display box, the test password needs to be re-input for calibration.

[0153] The pressure detection component 103 factory mode calibration interface is shown in Figure 8 The interface includes threshold input boxes for “air pressure difference”, “air pressure slope”, “air pressure difference calculation time”, “current air pressure difference calculation time”, and “current air pressure slope”. These parameters can be set according to user requirements. The interface also includes a “factory mode calibration” button and a “threshold lock” button, as well as “threshold lock state” and “calibration state” display boxes. The factory calibration mode is shown in Figure 9 After inputting the thresholds for “air pressure difference”, “air pressure slope”, and “air pressure difference calculation time”, clicking the “factory mode calibration” button, and if “calibration success” is displayed, the next step is performed. If “calibration failure” is displayed, return to the first step to set the parameters. After calibration success, confirm whether the values displayed in the output boxes for “current air pressure difference”, “current air pressure slope”, and “current air pressure difference calculation time” are correct. If correct, the factory mode calibration is completed. If the output values are abnormal, return to the first step to re-set the parameters and then calibrate.

[0154] Secondly, the application provides a battery test method. In some embodiments, as shown in Figure 10 The method includes the following steps:

[0155] S110, testing the airtightness index of the battery 100 by the airtightness test assembly 2;

[0156] S120, during the inflation period of the air tightness test by the air tightness test assembly 2, the wake-up test is performed by the wake-up test assembly 1, in which the battery management system 104 in the battery 100 is woken up when the internal air pressure of the battery 100 reaches the trigger condition, and the first test system 11 in the wake-up test assembly 1 receives the wake-up state information sent by the battery management system 104.

[0157] This embodiment performs the air tightness test and the wake-up test in the same inflation period, which can complete the air tightness test and the wake-up test in one inflation process, saves the process of additional inflation for the wake-up test, speeds up the test rhythm before the battery 100 leaves the factory, thereby improving the overall test efficiency of the battery, reducing the test station demand, and reducing the setting cost of the test device. Moreover, the air tightness test is performed in the pressure stabilization stage of the inflation period, and the wake-up test is performed in the pressure rising stage of the inflation period, which can ensure that the internal air pressure of the battery 100 reaches the trigger condition, and improve the success rate of the wake-up test.

[0158] In some embodiments, the air tightness test assembly 2 includes a second test system 21, and the battery test method further includes:

[0159] One of the first test system 11 and the second test system 21 stops testing when receiving the failure information sent by the other.

[0160] For example, in a positive pressure inflation period, if the first test system 11 receives the wake-up failure information in the first pressure rising stage P1, the wake-up failure information is sent to the second test system 21, and the second test system 21 stops the air tightness test when reaching the first pressure stabilization stage P2 after receiving the wake-up failure information. In a negative pressure inflation period, if the second test system 21 measures that the air tightness index does not meet the requirements in the second pressure stabilization stage N2, the information that the air tightness index does not meet the requirements is sent to the first test system, and the wake-up test is stopped when reaching the second pressure rising stage N3.

[0161] This embodiment stops testing when one of the first test system 11 and the second test system 21 sends the failure information, which indicates that the wake-up test or the air tightness test does not pass, indicating that the performance of the battery 100 does not meet the requirements, which can improve the overall test efficiency of the battery 100.

[0162] In some embodiments, the battery 100 further includes a pressure detection component 103 configured to detect the internal pressure of the battery 100 and send a wake-up trigger signal to the battery management system 104 when the air pressure reaches the trigger condition; as Figure 11 The battery test method further includes:

[0163] S111, before the wake-up test, the first test system 11 receives an external input of a preset test trigger condition, and sends it to the pressure detection component 103 through the battery management system 104, so as to set the trigger condition of the pressure detection component 103 to the preset test trigger condition, which is lower than the preset factory trigger condition of the battery 100.

[0164] Wherein, S111 is executed between S110 and S120. By setting the trigger condition of the pressure detection component 103 through the battery management system 104, whether the communication connection and interaction logic between the pressure detection component 103 and the battery management system 104 are normal can also be tested compared with directly setting the trigger condition of the pressure detection component 103.

[0165] The embodiment reduces the trigger condition of the pressure detection component 103 during the wake-up test through software calibration, which can reduce the power-on waiting time after the start of the wake-up test, reduce the test rhythm, reduce the test time in the electrical performance test station, and reduce the number of test devices. Moreover, by reducing the trigger condition, the air pressure required for the wake-up test can be significantly lower than that required for the air tightness test, which is beneficial to the wake-up test in the pressure rising stage in the inflation period. Even if the wake-up test takes a certain time, the battery management system 104 can be awakened, thereby improving the pass rate of the wake-up test.

[0166] In some embodiments, as shown in Figure 11 The battery test method further comprises:

[0167] S112, after setting the preset test trigger condition, the first test system 11 reads the trigger condition set by the pressure detection component 103 before the wake-up test through the battery management system 104;

[0168] S113, in the case where the read trigger condition is consistent with the preset test trigger condition, the first test system 11 sends state information indicating that the test trigger condition setting is successful.

[0169] Wherein, S112 and S113 are sequentially executed, and both are executed after S111.

[0170] The embodiment reads again after setting the preset test trigger condition, and judges whether the preset test trigger condition is set successfully by comparison, which can improve the accuracy of the wake-up test.

[0171] In some embodiments, as shown in Figure 11 The battery test method further comprises:

[0172] S114, in the case where the wake-up state information is wake-up success, causing the first test system 11 to receive an externally input preset factory trigger condition and send it to the pressure detection component 103 through the battery management system 104 to set the trigger condition of the pressure detection component 103 to the preset factory trigger condition.

[0173] S114 is executed after S113.

[0174] This embodiment can restore the trigger condition of the pressure detection component 103 to the preset factory trigger condition through software after the wake-up test is completed, to meet the needs of users and ensure that the battery 100 wakes up the battery management system 104 according to the preset factory trigger condition in the case of thermal runaway.

[0175] In some embodiments, as shown in Figure 11 The battery test method further includes:

[0176] S115, after setting the preset factory trigger condition, causing the first test system 11 to read the trigger condition of the pressure detection component 103 through the battery management system 104.

[0177] S116, in the case where the read trigger condition is consistent with the externally input preset factory trigger condition, causing the first test system 11 to issue state information of factory trigger condition setting success.

[0178] S115 and S116 are sequentially executed and are both executed after S114.

[0179] This embodiment reads the preset factory trigger condition again after setting and judges whether the preset factory trigger condition is set successfully through comparison, which can improve the accuracy of setting the trigger condition of the pressure detection component 103 in the battery product and ensure that the battery 100 meets the needs of users.

[0180] In some embodiments, during the inflation period of the airtightness test assembly 2 for airtightness test, the wake-up test through the wake-up test assembly 1 in S120 includes:

[0181] If the inflation period is a positive pressure inflation period P and sequentially includes a first pressure increasing stage P1, a first pressure stabilizing stage P2 and a first pressure decreasing stage P3, the wake-up test is performed in the first pressure increasing stage P1 and the airtightness test is performed in the first pressure stabilizing stage P2; and / or

[0182] If the inflation period is a negative pressure inflation period N and sequentially includes a second pressure decreasing stage N1, a second pressure stabilizing stage N2 and a second pressure increasing stage N3, the airtightness test is performed in the second pressure stabilizing stage N2 and the wake-up test is performed in the second pressure increasing stage N3.

[0183] The embodiment can better verify the sealing of the shell assembly 101 by performing the air tightness test on the battery 100 through the positive pressure inflation cycle P and the negative pressure inflation cycle N. Moreover, for the positive pressure inflation cycle P or the negative pressure inflation cycle N, the wake-up test can be completed within the inflation cycle of the air tightness test. Moreover, the wake-up test can be performed at a suitable stage within the inflation cycle according to the requirement of the pressure change trend of the wake-up test, and the time sequence and timing of the wake-up test and the air tightness test are reasonably arranged to reliably complete the two tests within the same inflation cycle.

[0184] In some embodiments, before the wake-up test, the battery test method further comprises:

[0185] If the inflation cycle is the positive pressure inflation cycle P, the trigger condition of the pressure detection component 103 is set to the preset test trigger condition before the first pressure increasing stage P1 starts, and / or

[0186] If the inflation cycle is the negative pressure inflation cycle N, the trigger condition of the pressure detection component 103 is set to the preset test trigger condition at the second pressure stabilizing stage N2.

[0187] The preset test trigger condition is lower than the preset factory trigger condition of the battery 100.

[0188] The embodiment can ensure that the wake-up test is performed according to the preset test trigger condition at the pressure increasing stage by setting the trigger condition of the pressure detection component 103 at a suitable timing within the inflation cycle.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features thereof, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery testing device for testing a battery (100), the battery (100) comprising a battery management system (104) configured to be woken up when a pressure change condition inside the battery (100) reaches a trigger condition, the battery testing device comprising: a wake-up testing assembly (1) comprising a first testing system (11) configured to receive wake-up state information sent by the battery management system (104) ; and an air tightness testing assembly (2) configured to test an air tightness index of the battery (100) ; wherein the wake-up testing assembly (1) is configured to perform a wake-up test during an inflation period of the air tightness testing assembly (2) performing an air tightness test.

2. The battery testing device of claim 1, wherein, The air tightness testing assembly (2) comprises a second testing system (21), the first testing system (11) and the second testing system (21) are interactively connectable, one of the first testing system (11) and the second testing system (21) is configured to stop testing when receiving fault information sent by the other.

3. The battery testing device of claim 1, wherein, The battery (100) further comprises a pressure detection component (103) configured to detect pressure inside the battery (100) and send a wake-up trigger signal to the battery management system (104) when the pressure change condition reaches the trigger condition. The first testing system (11) is configured to receive a preset test trigger condition inputted from outside before the wake-up test, and send the preset test trigger condition to the pressure detection component (103) through the battery management system (104) to set the trigger condition of the pressure detection component (103) as the preset test trigger condition, the preset test trigger condition being lower than a preset factory trigger condition of the battery (100).

4. The battery testing device of claim 3, wherein, The first testing system (11) is configured to read the trigger condition of the pressure detection component (103) through the battery management system (104) after setting the preset test trigger condition, and send state information of test trigger condition setting success when the read trigger condition is consistent with the preset test trigger condition.

5. The battery testing device of claim 3, wherein, The first testing system (11) is configured to receive a preset factory trigger condition inputted from outside when receiving the wake-up state information as wake-up success, and send the preset factory trigger condition to the pressure detection component (103) through the battery management system (104) to set the trigger condition of the pressure detection component (103) as the preset factory trigger condition.

6. The battery testing device of claim 5, wherein, The first testing system (11) is configured to read the trigger condition of the pressure detection component (103) through the battery management system (104) after setting the preset factory trigger condition, and send state information of factory trigger condition setting success when the read trigger condition is consistent with the preset factory trigger condition inputted from outside.

7. The battery testing apparatus of any one of claims 1-6, wherein, The airtight test assembly (2) comprises a second test system (21), and the inflation cycle is a positive pressure inflation cycle (P) or a negative pressure inflation cycle (N); The positive pressure inflation cycle (P) comprises, in sequence, a first pressure increasing stage (P1), a first pressure stabilizing stage (P2) and a first pressure decreasing stage (P3), the first test system (11) is configured to perform the wake-up test in the first pressure increasing stage (P1), and the second test system (21) is configured to perform the airtightness test in the first pressure stabilizing stage (P2); and / or The negative pressure inflation cycle (N) comprises, in sequence, a second pressure decreasing stage (N1), a second pressure stabilizing stage (N2) and a second pressure increasing stage (N3), the second test system (21) is configured to perform the airtightness test in the second pressure stabilizing stage (N2), and the first test system (11) is configured to perform the wake-up test in the second pressure increasing stage (N3).

8. The battery testing device of claim 7, wherein, The battery (100) further comprises a pressure detection component (103) configured to detect the internal pressure of the battery (100) and send a wake-up trigger signal to the battery management system (104) if the air pressure change condition reaches the trigger condition; If the inflation cycle is the positive pressure inflation cycle (P), the first test system (11) is configured to set the trigger condition of the pressure detection component (103) to a preset test trigger condition before the start of the first pressure increasing stage (P1), and / or If the inflation cycle is the negative pressure inflation cycle (N), the first test system (11) is configured to set the trigger condition of the pressure detection component (103) to a preset test trigger condition in the second pressure stabilizing stage (N2); The preset test trigger condition is lower than a preset factory trigger condition of the battery (100).

9. The battery testing device of claim 8, wherein, The preset test trigger condition is set at a first time, the battery management system (104) is woken up at a second time, and the difference between the second time and the first time is not more than a preset time.

10. The battery testing device of any one of claims 1-6, wherein, The wake-up test assembly (1) further comprises a test connector (12) configured to be connected with a battery connector (105), the first test system (11) is electrically connected with the test connector (12) and configured to receive the wake-up state information sent by the battery management system (104).

11. The battery testing device of claim 10, wherein, The wake-up test assembly (1) further comprises a sealing structure (13) arranged on the test connector (12) and configured to seal the test connector (12) and the connection position of the test connector (12) and the battery connector (105).

12. The battery test device according to any one of claims 1-6, further comprising a gas source (3), and the airtight test assembly (2) comprises: a test cavity (22) and a reference cavity (23), each first port of which is in communication with the gas source (3), and each second port of which is in communication with the inside of the battery (100); a differential pressure detection component (24) configured to detect the pressure difference between the test cavity (22) and the reference cavity (23); and ​ The second test system (21) is configured to receive the differential pressure signal to obtain the air tightness index.

13. A battery testing method, comprising: testing an air tightness index of a battery (100) by an air tightness test assembly (2); during an inflation period of the air tightness test by the air tightness test assembly (2), performing a wake-up test by a wake-up test assembly (1), in which a battery management system (104) provided in the battery (100) is woken up when an internal pressure change of the battery (100) reaches a trigger condition, and a first test system (11) in the wake-up test assembly (1) receives wake-up state information sent by the battery management system (104).

14. The battery testing method of claim 13, wherein, The air tightness test assembly (2) comprises a second test system (21), and the battery testing method further comprises: one of the first test system (11) and the second test system (21) stops testing when receiving fault information sent by the other.

15. The battery testing method of claim 13, wherein, The battery (100) further comprises a pressure detection component (103) configured to detect an internal pressure of the battery (100) and send a wake-up trigger signal to the battery management system (104) when the internal pressure change reaches the trigger condition, and the battery testing method further comprises: Before the wake-up test, the first test system (11) receives a preset test trigger condition input from outside and sends it to the pressure detection component (103) through the battery management system (104) to set the trigger condition of the pressure detection component (103) to the preset test trigger condition, which is lower than a preset factory trigger condition of the battery (100).

16. The battery testing method of claim 15, further comprising: After setting the preset test trigger condition, the first test system (11) reads the trigger condition set by the pressure detection component (103) before the wake-up test through the battery management system (104); When the read trigger condition is consistent with the preset test trigger condition, the first test system (11) sends state information indicating that the test trigger condition setting is successful.

17. The battery testing method of claim 15 or 16, further comprising: When the wake-up state information indicates that the wake-up is successful, the first test system (11) receives a preset factory trigger condition input from outside and sends it to the pressure detection component (103) through the battery management system (104) to set the trigger condition of the pressure detection component (103) to the preset factory trigger condition.

18. The battery testing method of claim 17, further comprising: After setting the preset factory trigger condition, the first test system (11) reads the trigger condition of the pressure detection component (103) through the battery management system (104); In the case that the read trigger condition is consistent with the preset factory trigger condition inputted from outside, the first test system (11) is caused to send state information of factory trigger condition setting success.

19. The battery testing method of claim 18, wherein, The wakeup test by waking up the test assembly (1) is performed during an inflation period of the airtightness test assembly (2) for airtightness test, which comprises: If the inflation period is a positive pressure inflation period (P) and comprises in sequence a first pressure increasing stage (P1), a first pressure stabilizing stage (P2) and a first pressure decreasing stage (P3), the wakeup test is performed in the first pressure increasing stage (P1) and the airtightness test is performed in the first pressure stabilizing stage (P2); and / or If the inflation period is a negative pressure inflation period (N) and comprises in sequence a second pressure decreasing stage (N1), a second pressure stabilizing stage (N2) and a second pressure increasing stage (N3), the airtightness test is performed in the second pressure stabilizing stage (N2) and the wakeup test is performed in the second pressure increasing stage (N3).

20. The battery testing method of claim 19, wherein, Before the wakeup test, the battery test method further comprises: If the inflation period is a positive pressure inflation period (P), the trigger condition of the pressure detection component (103) is set to a preset test trigger condition before the first pressure increasing stage (P1) starts, and / or If the inflation period is a negative pressure inflation period (N), the trigger condition of the pressure detection component (103) is set to a preset test trigger condition in the second pressure stabilizing stage (N2); Wherein, the preset test trigger condition is lower than a preset factory trigger condition of the battery (100).

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