Detection method and system for power battery waterproof test

Abstract

The present application provides a method and system for detecting a power battery waterproof test, the method comprising the following steps: Step S1, obtaining water ingress conditions at each sealing position of the power battery, the water ingress conditions including whether water has ingressed and the location of the water ingress; Step S2, obtaining the battery water ingress conditions of the power battery based on the water ingress conditions at each sealing position of the power battery; Step S3, obtaining the test results of the power battery waterproof test based on the water ingress conditions of the power battery. The method for detecting a power battery waterproof test provided in the present application obtains the battery water ingress conditions of the power battery in real time by obtaining the water ingress conditions at each sealing position of the power battery, including whether water has ingressed and the location of the water ingress, and obtains the test results of the power battery waterproof test in a timely and effective manner, which is beneficial for troubleshooting failures of power battery waterproof tests and designing subsequent corrective measures.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery waterproofing, and in particular to a detection method and system for a power battery waterproofing test. Background Art

[0002] Power battery waterproofing tests require a long soaking period, with some industry standards requiring immersion for 48 hours or longer. If water ingress occurs during the test, there's currently no effective way to detect it immediately, requiring only post-test inspections. This can lead to long correction cycles for test failures. If significant water ingress occurs, even with water-test paper, it's difficult to determine the source of the water ingress, hindering troubleshooting and subsequent corrective measures for failed power battery waterproofing tests. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned background technology and to provide a detection method and system for a power battery waterproof test.

[0004] In a first aspect, the present application provides a method for detecting a power battery waterproof test, comprising the following steps:

[0005] Step S1: Acquire water ingress conditions at each sealing position of the power battery, wherein the water ingress conditions include whether water has ingressed and water ingress position information.

[0006] Step S2: obtaining the water ingress condition of the power battery according to the water ingress condition at each sealing position of the power battery;

[0007] Step S3: Obtain test results of a waterproof test of the power battery according to the water ingress condition of the power battery.

[0008] According to the first aspect, in a first possible implementation manner of the first aspect, step S1 specifically includes the following steps:

[0009] Step S11, obtaining the water vapor generation condition in the battery pack of the power battery;

[0010] Step S12: Obtaining the water flow rate at each sealing position of the power battery;

[0011] Step S13: When water vapor is generated in the battery pack of the power battery, compare the water flow weight at each sealing position of the power battery with the water vapor weight threshold to obtain a weight comparison working condition;

[0012] Step S14: Obtain the water ingress conditions at each sealing position of the power battery according to the obtained weight comparison conditions.

[0013] According to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, step S11 specifically includes the following steps:

[0014] Step S111, obtaining the temperature value inside the power battery pack;

[0015] Step S112: Acquire the ambient temperature value outside the power battery pack;

[0016] Step S113: Compare the temperature value inside the battery pack with the ambient temperature value to obtain a temperature comparison working condition;

[0017] Step S114: Obtain the water vapor generation condition in the battery pack of the power battery according to the temperature comparison condition.

[0018] According to the second possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect, step S113 specifically includes the following steps:

[0019] Step S1131: When the temperature value inside the battery pack is lower than the ambient temperature value, it is determined that water vapor may be generated in the battery pack.

[0020] According to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, step S14 specifically includes the following steps:

[0021] S141. When the water flow weight at the power battery sealing position is less than the water vapor weight threshold, it is determined that no water has entered the current sealing position;

[0022] S142: When the water flow weight at the power battery sealing position is not less than the water vapor weight threshold, it is determined that water has entered the current sealing position.

[0023] In a second aspect, the present application provides a detection system for a power battery waterproof test, comprising:

[0024] A sealing position water ingress condition acquisition module is used to acquire the water ingress condition of each sealing position of the power battery, wherein the water ingress condition includes whether water has ingressed and the water ingress position information;

[0025] a battery water ingress condition acquisition module, which is in communication with the sealing position water ingress condition acquisition module and is configured to acquire the battery water ingress condition of the power battery based on the acquired water ingress conditions of each sealing position of the power battery;

[0026] The waterproof test result acquisition module is communicatively connected to the battery water ingress condition acquisition module and is used to obtain the test result of the waterproof test of the power battery according to the water ingress condition of the power battery.

[0027] According to the second aspect, in a first possible implementation manner of the second aspect, the sealing position water inflow condition acquisition module includes:

[0028] A water vapor generation condition acquisition unit, used to acquire the water vapor generation condition in the battery pack of the power battery;

[0029] A water flow acquisition unit at a sealing position, used to acquire the water flow at each sealing position of the power battery;

[0030] a weight comparison unit, the water vapor generation working condition acquisition unit, and the sealing position;

[0031] The sealing position water ingress condition acquisition unit is communicatively connected to the weight comparison unit and is used to acquire the water ingress conditions at each sealing position of the power battery according to the acquired weight comparison conditions.

[0032] According to the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect,

[0033] The water vapor generation working condition acquisition unit includes:

[0034] The battery pack temperature value acquisition subunit is used to obtain the temperature value inside the power battery pack;

[0035] The ambient temperature value acquisition subunit is used to obtain the ambient temperature value outside the power battery pack;

[0036] a temperature comparison subunit, which is in communication with the battery pack temperature value acquisition subunit and the ambient temperature value acquisition subunit, and is used to compare the temperature value inside the battery pack with the ambient temperature value to obtain a temperature comparison working condition;

[0037] The water vapor generation working condition subunit is communicatively connected to the temperature comparison subunit, and is used to obtain the water vapor generation working condition in the battery pack of the power battery according to the temperature comparison working condition.

[0038] According to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect,

[0039] The water vapor generation working condition subunit includes:

[0040] A determination unit is communicatively connected to the temperature comparison subunit, and is used to determine that water vapor may be generated in the battery pack when the temperature value in the battery pack is lower than the ambient temperature value.

[0041] According to the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the sealing position water inflow condition acquiring unit includes:

[0042] a first water ingress condition acquisition subunit, communicatively connected to the weight comparison unit, for determining that no water has entered the current sealing position when the water flow weight at the power battery sealing position is less than a water vapor weight threshold;

[0043] The second water inflow condition acquisition subunit is in communication with the weight comparison unit and is used to determine that water has entered the current sealing position when the water flow weight at the power battery sealing position is not less than a water vapor weight threshold.

[0044] Compared with the prior art, the advantages of the present invention are as follows:

[0045] The detection method for the power battery waterproof test provided in the present application obtains the water ingress conditions at each sealing position of the power battery, including whether water has entered and the location information, and obtains the battery water ingress conditions of the power battery in real time, thereby obtaining the test results of the power battery waterproof test in a timely and effective manner, which is conducive to the troubleshooting of failure of the power battery waterproof test and the design of subsequent corrective measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a flow chart of a method for detecting a power battery waterproof test according to an embodiment of the present invention;

[0047] Figure 2 This is another method flow chart of a detection method for a power battery waterproof test according to an embodiment of the present invention;

[0048] Figure 3 This is a functional module block diagram of a detection system for a power battery waterproof test according to an embodiment of the present invention;

[0049] Figure 4 This is another functional module block diagram of the detection system for the power battery waterproof test according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that the present invention is not intended to be limited to those embodiments. On the contrary, it is intended to cover variations, modifications, and equivalents within the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0051] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] Note: The following example is only a specific example and is not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequence, etc. Those skilled in the art can apply the concepts of the present invention to construct more embodiments not described in this specification by reading this specification.

[0053] The power battery waterproof test is an important test item for the power battery performance test. During the power battery waterproof test, if water enters the power battery, there is no effective way to detect it immediately. It can only be discovered after the waterproof test is completed and the battery is unpacked for inspection. This leads to a long test failure rectification cycle. If the amount of water entering is large, it is difficult to determine the location of the water ingress even if a water test paper is pasted, which is not conducive to troubleshooting the test failure and the subsequent design of rectification measures.

[0054] In view of this, please refer to Figure 1 , the present application provides a detection method for a power battery waterproof test, comprising the following steps:

[0055] Step S1: Acquire water ingress conditions at each sealing position of the power battery, wherein the water ingress conditions include information on whether water has ingressed and the water ingress position. The sealing positions of the power battery include locations of each sealing component of the power battery box;

[0056] Step S2: obtaining the water ingress condition of the power battery based on the water ingress condition at each sealing position of the power battery; by obtaining information on whether water has ingressed and the water ingress location at each sealing position of the power battery, timely and effectively obtaining the test results of the power battery waterproof test, so as to timely conduct troubleshooting and design rectification countermeasures for power battery waterproof test failures, shorten the test failure rectification cycle, and avoid eliminating traces of water ingress at the water ingress location after a large amount of water has ingressed into the power battery, thereby facilitating troubleshooting of the fault location;

[0057] Step S3: Obtain test results of a waterproof test of the power battery according to the water ingress condition of the power battery.

[0058] The detection method for the power battery waterproof test provided in the present application obtains the water ingress conditions at each sealing position of the power battery, including whether water has entered and the location information, and obtains the battery water ingress conditions of the power battery in real time, thereby obtaining the test results of the power battery waterproof test in a timely and effective manner, which is conducive to the troubleshooting of failure of the power battery waterproof test and the design of subsequent corrective measures.

[0059] In one embodiment, please refer to Figure 2 , the step S1 specifically includes the following steps:

[0060] Step S11, obtaining the water vapor generation condition in the battery pack of the power battery;

[0061] Step S12: Obtaining the water flow rate at each sealing position of the power battery;

[0062] Step S13: When water vapor is generated in the battery pack of the power battery, compare the water flow weight at each sealing position of the power battery with the water vapor weight threshold to obtain a weight comparison working condition;

[0063] Step S14: Based on the obtained weight comparison conditions, the water ingress conditions at each sealing position of the power battery are obtained. This allows the removal of water vapor from the power battery pack during the power battery waterproof test, preventing water vapor generated in the battery pack from being deposited at the sealing positions on the inner wall of the battery pack, which could lead to false detection of water ingress to the power battery. This effectively improves the effectiveness and efficiency of the automatic detection of the power battery waterproof test.

[0064] In one embodiment, step S11 specifically includes the following steps:

[0065] Step S111, obtaining the temperature value inside the power battery pack;

[0066] Step S112: Acquire the ambient temperature value outside the power battery pack;

[0067] Step S113: Compare the temperature value inside the battery pack with the ambient temperature value to obtain a temperature comparison working condition;

[0068] Step S114: Obtain the water vapor generation condition in the battery pack of the power battery according to the temperature comparison condition.

[0069] In one embodiment, step S113 specifically includes the following steps:

[0070] Step S1131: It can be understood that when the temperature value inside the battery pack is lower than the ambient temperature value, water in the higher temperature ambient air encounters the lower temperature inner wall of the battery pack and is more likely to be deposited on the inner wall of the battery pack to form water vapor. It is determined that water vapor may be generated in the battery pack, and the subsequent water vapor removal method steps are implemented based on this.

[0071] In one embodiment, step S14 specifically includes the following steps:

[0072] S141. When the water flow weight at the power battery sealing position is less than the water vapor weight threshold, it is determined that no water has entered the current sealing position;

[0073] S142: When the water flow weight at the power battery sealing position is not less than the water vapor weight threshold, it is determined that water has entered the current sealing position.

[0074] As described above, according to the present application, the water vapor weight threshold is generated based on actual calibration. In the waterproof test environment of the power battery, a power battery box with five closed sides and a hollow interior can be placed in water, that is, its top surface is open and does not contact water, and the inner wall surface of the power battery box has been pre-treated to the test temperature of the waterproof test, such as water temperature, and the size of the water vapor deposited on the inner wall surface of the power battery box is observed and measured, and its weight is estimated as the water vapor weight threshold during the current battery pack waterproof test. For the accuracy of the test, the average value of multiple tests can be obtained through multiple tests, and the average value can be used as the water vapor weight threshold corresponding to the current ambient temperature value.

[0075] To save failure analysis time, it is also possible to pre-test the power battery pack for water ingress at different ambient temperatures to obtain information on the volume of water vapor deposited on the inner wall of the power battery pack at different ambient temperatures. This allows the compilation of a comparison table of different ambient temperatures and water vapor weight thresholds. During the actual test, the current ambient temperature is obtained, and the table of different ambient temperatures and water vapor weight thresholds is searched to obtain the corresponding water vapor weight threshold at the current ambient temperature for weight analysis comparison.

[0076] In one embodiment, step S2 specifically includes the following steps:

[0077] If water enters any of the power battery's seals, the battery is deemed waterproof. The severity of the failure is determined based on the water ingress conditions at each seal. If water ingress occurs at multiple seals, the battery's waterproof performance is considered poor. If water ingress occurs at a single seal, the seal at that seal is deemed to have failed, and damage is determined at the contact point between the battery box and the seal. After the waterproof test is completed, the battery is unpacked to determine the cause of the failure.

[0078] Based on the same invention concept, please refer to Figure 3 , the present application provides a detection system for a power battery waterproof test, comprising:

[0079] The sealing position water ingress condition acquisition module 100 is used to acquire the water ingress condition of each sealing position of the power battery, wherein the water ingress condition includes whether water has ingressed and the water ingress position information;

[0080] a battery water ingress condition acquisition module 200, which is in communication with the sealing position water ingress condition acquisition module and is configured to acquire the battery water ingress condition of the power battery based on the acquired water ingress conditions of each sealing position of the power battery;

[0081] The waterproof test result acquisition module 300 is communicatively connected to the battery water ingress condition acquisition module, and is used to acquire the test result of the waterproof test of the power battery according to the water ingress condition of the power battery.

[0082] The detection system for the power battery waterproof test provided in the present application obtains the water ingress conditions at each sealing position of the power battery pack in real time, including whether water has entered and the water ingress position information, and obtains the test results of the power battery waterproof test in a timely manner, which is conducive to the troubleshooting of the failure location of the waterproof test and the subsequent design of corrective measures. The power battery waterproof failure analysis can be started during the power battery waterproof test process, and there is no need to unpack the power battery after the waterproof test fails to detect the water ingress position and the cause of the water ingress, which effectively shortens the test failure analysis and rectification cycle of the power battery waterproof test.

[0083] In one embodiment, please refer to Figure 4 The sealing position water inflow condition acquisition module includes:

[0084] A water vapor generation condition acquisition unit 110 is used to acquire the water vapor generation condition in the battery pack of the power battery;

[0085] The water flow acquisition unit 120 at the sealing position is used to acquire the water flow at each sealing position of the power battery;

[0086] A weight comparison unit 130, the water vapor generation working condition acquisition unit and the sealing position;

[0087] The sealing position water ingress condition acquisition unit 140 is in communication with the weight comparison unit and is configured to acquire the water ingress conditions at each sealing position of the power battery according to the acquired weight comparison conditions.

[0088] In one embodiment, the water flow acquisition unit at the sealing position is implemented as a water drop sensor. Preferably, the water drop sensor has positioning and communication functions. The water drop sensor can acquire the amount of water entering the sealing position of the power battery and transmit information about the amount of water entering and the location of the water entering. The water inlet location can be implemented as a specific sealing position of the power battery.

[0089] In one embodiment, the water vapor generation operating condition acquisition unit includes:

[0090] The battery pack temperature value acquisition subunit is used to obtain the temperature value inside the power battery pack;

[0091] The ambient temperature value acquisition subunit is used to obtain the ambient temperature value outside the power battery pack;

[0092] a temperature comparison subunit, which is in communication with the battery pack temperature value acquisition subunit and the ambient temperature value acquisition subunit, and is used to compare the temperature value inside the battery pack with the ambient temperature value to obtain a temperature comparison working condition;

[0093] The water vapor generation working condition subunit is communicatively connected to the temperature comparison subunit, and is used to obtain the water vapor generation working condition in the battery pack of the power battery according to the temperature comparison working condition.

[0094] In one embodiment, the water vapor generation operating condition subunit includes:

[0095] A determination unit is communicatively connected to the temperature comparison subunit, and is used to determine that water vapor may be generated in the battery pack when the temperature value in the battery pack is lower than the ambient temperature value.

[0096] In one embodiment, the sealing position water inflow condition obtaining unit includes:

[0097] a first water ingress condition acquisition subunit, communicatively connected to the weight comparison unit, for determining that no water has entered the current sealing position when the water flow weight at the power battery sealing position is less than a water vapor weight threshold;

[0098] The second water inflow condition acquisition subunit is in communication with the weight comparison unit and is used to determine that water has entered the current sealing position when the water flow weight at the power battery sealing position is not less than a water vapor weight threshold.

[0099] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0100] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of each of the above method embodiments. The computer program includes computer program code, which can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0101] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0102] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. The processor is the control center of a computer device and connects all parts of the computer device using various interfaces and lines.

[0103] The memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created based on the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Fl ash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0104] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, servers, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage) containing computer-usable program code.

[0105] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0108] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for detecting a power battery waterproof test, characterized in that: The following steps are involved: Step S1, obtaining water ingress conditions at each sealing position of the power battery; Step S2: obtaining the water ingress condition of the power battery according to the water ingress condition at each sealing position of the power battery; Step S3: obtaining a test result of a waterproof test of the power battery according to the water ingress condition of the power battery; Wherein, the water inlet condition includes whether water is inflowing and water inflow position information; The step S1 specifically includes the following steps: Step S11, obtaining the water vapor generation condition in the battery pack of the power battery; Step S12: Obtaining the water flow rate at each sealing position of the power battery; Step S13: When water vapor is generated in the battery pack of the power battery, compare the water flow weight at each sealing position of the power battery with the water vapor weight threshold to obtain a weight comparison working condition; Step S14: Obtain the water ingress conditions at each sealing position of the power battery according to the obtained weight comparison conditions; The step S11 specifically includes the following steps: Step S111, obtaining the temperature value inside the power battery pack; Step S112: Acquire the ambient temperature value outside the power battery pack; Step S113: Compare the temperature value inside the battery pack with the ambient temperature value to obtain a temperature comparison working condition; Step S114: Obtaining the water vapor generation condition in the battery pack of the power battery according to the temperature comparison condition; The step S113 specifically includes the following steps: Step S1131: When the temperature value inside the battery pack is lower than the ambient temperature value, it is determined that water vapor may be generated in the battery pack; The step S14 specifically includes the following steps: S141. When the water flow weight at the power battery sealing position is less than the water vapor weight threshold, it is determined that no water has entered the current sealing position; S142: When the water flow weight at the power battery sealing position is not less than the water vapor weight threshold, it is determined that water has entered the current sealing position.

2. A detection system for a power battery waterproof test, comprising the detection method for a power battery waterproof test according to claim 1, characterized in that: include: A sealing position water ingress condition acquisition module is used to acquire the water ingress condition of each sealing position of the power battery, wherein the water ingress condition includes whether water has ingressed and the water ingress position information; a battery water ingress condition acquisition module, which is in communication with the sealing position water ingress condition acquisition module and is configured to acquire the battery water ingress condition of the power battery based on the acquired water ingress conditions of each sealing position of the power battery; The waterproof test result acquisition module is communicatively connected to the battery water ingress condition acquisition module and is used to obtain the test result of the waterproof test of the power battery according to the water ingress condition of the power battery.

3. The detection system for power battery waterproof test according to claim 2, characterized in that: The sealing position water inflow condition acquisition module includes: A water vapor generation condition acquisition unit, used to acquire the water vapor generation condition in the battery pack of the power battery; A water flow acquisition unit at a sealing position, used to acquire the water flow at each sealing position of the power battery; a weight comparison unit, the water vapor generation working condition acquisition unit, and the sealing position; The sealing position water ingress condition acquisition unit is communicatively connected to the weight comparison unit and is used to acquire the water ingress conditions at each sealing position of the power battery according to the acquired weight comparison conditions.

4. The detection system for power battery waterproof test according to claim 3, characterized in that: The water vapor generation working condition acquisition unit includes: The battery pack temperature value acquisition subunit is used to obtain the temperature value inside the power battery pack; The ambient temperature value acquisition subunit is used to obtain the ambient temperature value outside the power battery pack; a temperature comparison subunit, which is in communication with the battery pack temperature value acquisition subunit and the ambient temperature value acquisition subunit, and is used to compare the temperature value inside the battery pack with the ambient temperature value to obtain a temperature comparison working condition; The water vapor generation working condition subunit is communicatively connected to the temperature comparison subunit, and is used to obtain the water vapor generation working condition in the battery pack of the power battery according to the temperature comparison working condition.

5. The detection system for power battery waterproof test according to claim 4, characterized in that: The water vapor generation working condition subunit includes: A determination unit is communicatively connected to the temperature comparison subunit, and is used to determine that water vapor may be generated in the battery pack when the temperature value in the battery pack is lower than the ambient temperature value.

6. The detection system for power battery waterproof test according to claim 3, characterized in that: The sealing position water inflow condition acquisition unit includes: a first water ingress condition acquisition subunit, communicatively connected to the weight comparison unit, for determining that no water has entered the current sealing position when the water flow weight at the power battery sealing position is less than a water vapor weight threshold; The second water inflow condition acquisition subunit is in communication with the weight comparison unit and is used to determine that water has entered the current sealing position when the water flow weight at the power battery sealing position is not less than a water vapor weight threshold.

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