Battery liquid leakage detection equipment

Abstract

The invention relates to the technical field of battery detection equipment, in particular to battery leakage detection equipment, which comprises a detection assembly, a negative pressure pipeline, a purging pipeline, a detection pipeline and a detector, and is characterized in that the detection assembly is provided with a sealing cavity for placing a to-be-detected battery; the negative pressure pipeline, the purging pipeline and the detection pipeline can be respectively communicated with the sealing cavity; the detector is communicated with the sealing cavity through the detection pipeline, so that airflow blown into the sealing cavity by the purging pipeline enters the detector through the detection pipeline. According to the battery liquid leakage detection equipment provided by the invention, an existing mode of carrying out battery liquid leakage detection by smearing detection liquid is effectively replaced, the detection efficiency is improved, the detection accuracy is improved, and the leakage detection risk is reduced.

Description

Technical Field

[0001] This application relates to the field of battery testing equipment technology, and in particular to a battery leakage detection device. Background Technology

[0002] As a core component of modern electronic devices and electric vehicles, the safety and reliability of batteries are of paramount importance. Battery leakage not only leads to a decline in battery performance but can also cause serious consequences such as short circuits, equipment corrosion, and even fires and explosions. Therefore, leakage detection is an essential step in the battery production and use process.

[0003] Currently, battery leakage detection mainly relies on applying a detection solution. This involves evenly applying the solution to the battery surface and then observing for bubbles or color changes to determine if the battery is leaking.

[0004] However, the above-mentioned method of applying the test solution has many drawbacks: the application and observation process is cumbersome and time-consuming, especially in mass production scenarios, which seriously affects the production schedule; the test results are greatly affected by factors such as the uniformity and comprehensiveness of the test solution application and the experience of the testers, which can easily lead to missed detections or misjudgments, especially since tiny leaks may be overlooked due to careless observation; some test solutions are corrosive or toxic, and long-term exposure may harm the health of operators and also pollute the environment. Summary of the Invention

[0005] The purpose of this application is to provide a battery leakage detection device to address, to some extent, the inefficiency of the existing method of checking battery leakage by applying detection liquid, especially in mass production scenarios, which seriously affects production progress. Furthermore, the detection results are greatly affected by factors such as the uniformity and comprehensiveness of the application of the detection liquid, which can easily lead to missed detections or misjudgments. Additionally, some detection liquids are corrosive or toxic, which can easily pollute the environment.

[0006] According to a first aspect of this application, a battery leakage detection device is provided, including a detection component, a negative pressure pipeline, a purging pipeline, a detection pipeline, and a detector; The detection assembly is provided with a sealed cavity for placing the battery to be tested, and the negative pressure pipeline, the purge pipeline and the detection pipeline can be respectively connected to the sealed cavity; When the negative pressure pipeline is connected to the sealing cavity, the negative pressure pipeline can make the sealing cavity form a negative pressure; The detector is connected to the sealed cavity via the detection pipeline, so that the airflow blown into the sealed cavity by the purging pipeline enters the detector via the detection pipeline.

[0007] Preferably, it also includes a positive pressure gas source section for supplying gas to the purging pipeline; The purging pipeline includes a main filtration line and a filtration assembly. The first end of the main filtration line is connected to the positive pressure air source section, and the filtration assembly is disposed on the main filtration line.

[0008] Preferably, the purging pipeline further includes a purging branch, a pressure regulating valve, and a first proportional valve. The purging branch is connected to the second end of the main filter and the sealing cavity, and the pressure regulating valve and the first proportional valve are sequentially connected to the purging branch.

[0009] Preferably, the purging pipeline further includes a cleaning branch, which connects the second end of the main filtration pipeline and the detection pipeline to deliver clean air filtered by the main filtration pipeline to the detection pipeline for purging.

[0010] Preferably, the filtration assembly includes an air source triplet, a dryer, and a deodorizing filter connected in sequence to the main filtration path.

[0011] Preferably, the detection pipeline includes a detection branch, a cleaning branch, an air intake branch, and a three-way control valve. The three-way control valve connects the detection branch, the cleaning branch, and the air intake branch to control the detection pipeline to switch between a cleaning state and a detection state. When the detection pipeline is in the clean state, the clean branch is connected to the air intake branch; when the detection pipeline is in the detection state, the air intake branch is connected to the detection branch. The detection branch is connected to the detector; The intake branch connects the sealing cavity and the three-way control valve; The cleaning branch is connected to the sweeping branch and the three-way control valve.

[0012] Preferably, the detection pipeline further includes: A flow meter is installed in the detection branch; And / or, a second proportional valve, disposed in the intake branch.

[0013] Preferably, the cleaning branch further includes a cavity cleaning branch and a cavity control valve, the cavity cleaning branch connecting the sealing cavity and the cleaning branch, and the cavity control valve being disposed in the cavity cleaning branch; And / or, the detection tube is formed by connecting a transparent PTFE tube and a metal connector.

[0014] Preferably, the detection assembly includes a drive unit, a detection tray, and a detection cover plate. The drive unit is pulsatorically connected to at least one of the detection tray and the detection cover plate to drive the detection assembly to switch between a sealed state and an open state. The battery leakage detection device has a first direction. When the detection assembly is in the sealed state, the detection tray and the detection cover plate close to each other along the first direction to form the sealed cavity; When the detection component is in the open state, the detection tray and the detection cover are separated from each other.

[0015] Preferably, the detection assembly further includes a mounting frame, which includes a base and a support fixedly connected to each other, the base and the support being disposed opposite to each other along the first direction, and the battery leakage detection device also has a second direction perpendicular to the first direction; The driving unit includes a first driving component and a second driving component; The first driving component is connected to the detection cover plate and the bracket to drive the detection cover plate to move along the first direction; The second driving component is connected to the detection tray and the base to drive the detection tray to move along the second direction.

[0016] Preferably, the testing tray is made of polyoxymethylene material.

[0017] Preferably, the detection component further includes a reflection sensor, which is disposed on the bracket. When the detection component is in the open state, the reflection sensor is disposed opposite to the detection tray to collect the loading information of the detection tray. A through-beam sensor is disposed on the base. When the detection component is in the open state, the through-beam sensor is disposed on the side of the detection tray and is arranged along the diagonal of the detection tray to determine the position information of the battery to be tested in the detection tray.

[0018] Compared with the prior art, the beneficial effects of this application are as follows: The battery leakage detection equipment provided in this application, through a collaborative design of "negative pressure induction through negative pressure holding + precise capture through positive pressure purging + intelligent judgment by the detector," achieves ultimate identification of minute leaks in terms of detection accuracy, covers the entire surface and multiple leakage points in terms of detection comprehensiveness, and eliminates interference through multi-dimensional verification in terms of detection accuracy. It effectively replaces the existing method of battery leakage detection by applying detection liquid, realizing a fully automated process of "negative pressure suction - pressure holding - airflow purging - component detection." This not only effectively improves detection efficiency and adapts to the needs of high-speed production lines, but also effectively eliminates human judgment errors, avoiding the influence of operator experience, eyesight, fatigue, and other factors on the accuracy of detection results. The detector can accurately analyze changes in the composition of the airflow, enabling timely detection of even minute leaks, effectively improving detection accuracy and reducing the risk of missed detections. Experiments show that the battery leakage detection equipment provided in this application can achieve a 100% detection rate for micropores ≥0.15mm in the battery under test. The absence of detection liquid avoids contamination of the battery and operators, reduces subsequent cleaning procedures, and lowers detection costs.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an isometric structural diagram of the battery leakage detection device provided in the embodiments of this application; Figure 2 This is an isometric structural schematic diagram of the hood provided in an embodiment of this application; Figure 3 This is an isometric structural diagram of the detection component provided in the embodiments of this application; Figure 4 This is a schematic diagram of the isometric structure of the machine tool provided in the embodiments of this application; Figure 5 A schematic diagram of the purge pipeline layout provided in an embodiment of this application; Figure 6 This is a schematic diagram of the gas path layout of the detection pipeline provided in an embodiment of this application.

[0022] Figure label: 11-Machine cover; 111-Control panel; 12-Machine base; 13-Exhaust fan; 121-Operating table; 122-Storage box; 2-Detection component; 20-Sealed cavity; 21-Hosting frame; 211-Base; 212-Bracket; 22-Detection tray; 23-Detection cover; 24-Reflection sensor; 25-Through-beam sensor; 261-First drive unit; 262-Second drive unit; 3-Purge pipeline; 31-Main filter; 301-Air source triplet; 302-Drying tank; 3 03-Deodorizing filter; 32-Purge branch; 321-Pressure regulating valve; 322-First proportional valve; 33-Cleaning branch; 34-Purge gun route; 4-Detection line; 41-Detection branch; 411-Flow meter; 42-Inlet branch; 421-Second proportional valve; 422-Inlet valve; 43-Cleaning branch; 431-Cavity cleaning branch; 432-Cleaning control valve; 44-Three-way control valve; 5-Detector; F1-First direction; F2-Second direction; F3-Third direction. Detailed Implementation

[0023] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0024] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0025] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] The following reference Figures 1 to 6 This application describes a battery leakage detection device according to some embodiments.

[0029] See Figures 1 to 6 As shown, an embodiment of the first aspect of this application provides a battery leakage detection device, which includes a detection component 2, a negative pressure pipeline, a purge pipeline 3, a detection pipeline 4, and a detector 5. The detection component 2 is provided with a sealed cavity 20 for placing the battery to be tested. The negative pressure pipeline, the purge pipeline 3, and the detection pipeline 4 can be connected to the sealed cavity 20 respectively. When the negative pressure pipeline is connected to the sealed cavity 20, the negative pressure pipeline can make the sealed cavity 20 form a negative pressure. The detector 5 is connected to the sealed cavity 20 through the detection pipeline 4, so that the airflow blown into the sealed cavity 20 by the purge pipeline 3 enters the detector 5 through the detection pipeline 4.

[0030] The battery leakage detection equipment provided according to the above technical features adopts a combined design of a sealed cavity 20, a negative pressure pipeline, a purging pipeline 3, and a detection pipeline 4. The equipment can automatically complete the battery sealing, purging, and detection processes, the specific processes of which include: 1. Negative pressure maintenance: The negative pressure pipeline evacuates the sealed cavity 20 to form an environment lower than the internal pressure of the battery, and maintains the negative pressure for a certain period of time. If there is a leak in the battery, the internal electrolyte will accelerate the overflow to the battery surface or the sealed cavity 20 under the action of pressure difference. Even micron-level leaks can be quickly induced to be exposed.

[0031] 2. Positive pressure purging: After the negative pressure holding is completed, clean gas (such as nitrogen, clean air, etc.) can be injected into the sealed cavity 20 through the purging pipeline 3 to form a stable airflow. This airflow continuously purifies the battery surface, causing the overflowing electrolyte to evaporate faster and be incorporated into the airflow. Subsequently, the airflow carrying the electrolyte components enters the detector 5 through the detection pipeline 4.

[0032] 3. Detector 5 performs detection and analysis. Detector 5 analyzes the characteristic components of the electrolyte in the airflow in real time and automatically determines whether there is leakage by comparing with preset thresholds.

[0033] Thus, this battery leakage detection device, through a collaborative design of "negative pressure induction through negative pressure holding + precise capture through positive pressure purging + intelligent judgment by detector 5," achieves ultimate identification of minute leaks in terms of detection accuracy, covers the entire surface and multiple leakage points in terms of detection comprehensiveness, and eliminates interference through multi-dimensional verification in terms of detection accuracy. It effectively replaces the existing method of applying detection liquid for battery leakage detection, realizing a fully automated process of "negative pressure extraction - pressure holding - airflow purging - component detection." This not only effectively improves detection efficiency and adapts to the needs of high-speed production lines, but also effectively eliminates human judgment errors, avoiding the influence of operator experience, eyesight, fatigue, and other factors on the accuracy of detection results. Detector 5 can accurately analyze changes in the composition of the airflow, enabling timely detection of even minute leaks, effectively improving detection accuracy and reducing the risk of missed detections. Experiments show that the battery leakage detection device provided in this application can achieve a 100% detection rate for micropores ≥0.15mm in the battery under test. The absence of detection liquid avoids contamination of the battery and operators, reduces subsequent cleaning procedures, and lowers detection costs.

[0034] Optionally, the detector 5 mentioned above can be a VOC tester (a test instrument used to detect volatile organic compounds, i.e., volatile organic compounds, abbreviated as VOC), an infrared spectrometer, a conductivity detector, a semiconductor gas sensor detector, etc. It should be noted that the VOC tester, infrared spectrometer, conductivity detector, semiconductor gas sensor detector, etc. are all existing products in the field, and will not be described in detail here.

[0035] Preferably, the battery leakage detection device may include a negative pressure drive unit that provides power to the negative pressure pipeline. Optionally, the negative pressure drive unit may be an air pump, air compressor, etc. It should be noted that the negative pressure pipeline can be understood as a pipe or channel connecting the sealing cavity 20 and the negative pressure drive unit. Due to the viewing angle limitation, the negative pressure pipeline is not shown in the figure.

[0036] Preferably, the battery leakage detection device may include a positive pressure gas source for supplying gas to the purge line 3.

[0037] Optionally, the positive pressure gas source can be a gas pressurization device such as an air pump or compressor.

[0038] Optionally, the positive pressure gas source can also be a high-pressure gas storage device such as a high-pressure gas cylinder or a liquefied gas tank.

[0039] Preferably, the purge line 3 may include a filter main line 31 and a filter assembly. The first end of the filter main line 31 is connected to the positive pressure gas source. The filter assembly is disposed on the filter main line 31. In this way, the gas entering the purge line 3 from the positive pressure gas source can be filtered by the filter assembly on the filter main line 31 and then enter the sealed cavity 20, which can effectively prevent the impurity of the gas provided by the positive pressure gas source from affecting the test results.

[0040] Optionally, the above-mentioned filtration assembly may include an air source triplet 301 to perform preliminary filtration, treatment and control of the airflow entering the purge line 3.

[0041] It is important to note that the aforementioned air source triplet 301 is a device for processing and controlling compressed air in a pneumatic transmission system. It typically consists of three parts: an air filter, a pressure reducing valve, and an oil mist lubricator. The air filter primarily removes impurities, moisture, and oil droplets from the compressed air, providing clean, dry compressed air to protect downstream pneumatic components from wear and corrosion caused by contaminant particles, ensuring their normal operation and extending their service life. The pressure reducing valve adjusts the input high-pressure compressed air to a stable pressure value suitable for the pneumatic equipment's operation and maintains pressure stability, ensuring that the actuator can operate reliably within its design pressure range and preventing performance issues or even damage caused by excessive pressure or fluctuations. The oil mist lubricator adds an appropriate amount of lubricating oil mist to the compressed air, allowing the lubricating oil to enter the pneumatic components with the air, lubricating their internal moving parts, such as the piston, piston rod, and valve core of the cylinder, reducing friction, lowering wear, improving the working efficiency and service life of the pneumatic components, and also helping to prevent rust and corrosion. This air source triplet 301 is an existing product in this field and will not be described in detail here.

[0042] Optionally, such as Figure 5 As shown, the above-mentioned purging pipeline can also be provided with a purging gun passage 34. The purging gun passage 34 is located downstream of the above-mentioned gas source triplet 301 and is connected to the above-mentioned filter main passage 31 for connecting a manual purging gun. The gas filtered by the gas source triplet 301 can be sprayed out through the purging gun passage 34 via the manual purging gun, so as to realize the manual purging and cleaning of each component of the battery leakage detection equipment by manually using the manual purging gun.

[0043] Optionally, the above-mentioned filter assembly may include a drying tank 302 to dry the airflow entering the purge line 3.

[0044] Optionally, the above-mentioned filtration assembly may include a deodorizing filter 303 to deodorize the airflow entering the purge duct 3.

[0045] Preferably, such as Figure 5As shown, the above-mentioned filter assembly may include a gas source triplet 301, a dryer 302, and a deodorizing filter 303, and the gas source triplet 301, the dryer 302, and the deodorizing filter 303 are arranged sequentially from the first end to the second end of the main filter path 31.

[0046] Preferably, such as Figure 5 As shown, the purge line 3 may further include a purge branch line 32, a pressure regulating valve 321, and a first proportional valve 322. The purge branch line 32 connects the second end of the filter main line 31 and the sealing cavity 20. The pressure regulating valve 321 and the first proportional valve 322 are sequentially arranged in the purge branch line 32. In this way, on the one hand, the airflow output from the positive pressure air source can sequentially enter the sealing cavity 20 through the filter main line 31 and the purge branch line 32 to purge the battery to be tested. On the other hand, by setting the pressure regulating valve 321 and the first proportional valve 322, it is beneficial to realize the PID control of the detection airflow of the battery leakage detection device to ensure the stability of the airflow during the detection process.

[0047] Preferably, such as Figure 5 As shown, the above-mentioned purging pipeline 3 may also include a cleaning branch 33, which connects the second end of the filter main pipeline 31 and the detection pipeline 4. The cleaning branch 33 provides an air source for cleaning the detection pipeline 4, thereby effectively preventing the phenomenon that the previous detection airflow remains in the detection pipeline 4 and affects the result of the next detection when the battery leakage detection equipment is in continuous detection.

[0048] Preferably, such as Figure 6 As shown, the detection pipeline 4 may include a cleaning control valve 432, and the cleaning branch 33 may be connected to the detection pipeline 4 via the cleaning control valve 432 to control the on / off connection between the cleaning branch 33 and the detection pipeline 4.

[0049] Preferably, such as Figure 4 and Figure 6As shown, the detection pipeline 4 may further include a detection branch 41, a cleaning branch 43, an air intake branch 42, and a three-way control valve 44. The detection branch 41 is connected to the detector 5, the air intake branch 42 is connected to the sealing cavity 20 and the three-way control valve 44, the cleaning branch 43 is connected to the cleaning branch 33 and the three-way control valve 44 (that is, the cleaning branch 33 can be connected to the cleaning branch 43 via the cleaning control valve 432), and the three-way control valve 44 is connected to the detection branch 41, the cleaning branch 43, and the air intake branch 42 to control the detection pipeline 4 to switch between the cleaning state and the detection state. When the detection pipeline 4 is in a clean state (i.e., the cleaning control valve 432 is open and the sealing chamber 20 is in an open state), the cleaning branch 43 is connected to the intake branch 42. Thus, the gas that enters the cleaning branch 43 through the cleaning branch 33 enters the intake branch 42 in reverse through the three-way control valve 44, and then is discharged through the sealing chamber 20, thereby achieving the cleaning of the intake branch 42. Optionally, the detection pipeline 4 may further include an intake valve 422, through which the sealed cavity 20 may be connected to the intake branch 42. Optionally, the intake valve 422 may be a solenoid valve.

[0050] When the detection pipeline 4 is in the detection state (that is, the cleaning control valve 432 is closed and the sealing cavity 20 is in a sealed state), the air intake branch 42 is connected to the detection branch 41. In this way, the airflow that enters the sealing cavity 20 from the purge branch 32 can pass through the air intake branch 42 and the three-way control valve 44 in sequence to enter the detection branch 41, and then enter the detector 5 to perform detection.

[0051] Preferably, such as Figure 4 and Figure 6 As shown, the detection pipeline 4 may also include a flow meter 411, which may be installed in the detection branch 41 to monitor the airflow rate entering the detection branch 41.

[0052] Preferably, such as Figure 4 and Figure 6 As shown, the detection pipeline 4 may also include a second proportional valve 421, which is located in the air inlet branch 42 to further realize PID control of the detection airflow of the battery leakage detection device, so as to ensure the stability of the airflow during the detection process.

[0053] Preferably, such as Figure 4 and Figure 6As shown, the cleaning branch 43 may further include a cavity cleaning branch 431 and a cavity control valve. The cavity cleaning branch 431 connects the sealing cavity 20 and the cleaning branch 43. The cavity control valve is located in the cavity cleaning branch 431. Thus, on the one hand, the cavity control valve controls the opening and closing of the cavity cleaning branch 431; on the other hand, the cavity cleaning branch 431 connects the sealing cavity 20 and the cleaning branch 43, enabling the clean airflow in the cleaning branch 43 to flow to the sealing cavity 20.

[0054] Preferably, the detection pipeline 4 is formed by connecting a transparent PTFE tube and a metal connector, which effectively reduces the residue of substances on the inner wall of the detection pipeline 4, thereby improving the detection accuracy.

[0055] In an embodiment, preferably, such as Figure 1 and Figure 3 As shown, the detection component 2 may include a drive unit, a detection tray 22, and a detection cover plate 23. The drive unit is drively connected to at least one of the detection tray 22 and the detection cover plate 23 to drive the detection component 2 to switch between a sealed state and an open state. Specifically, in the sealed state, the detection tray 22 and the detection cover plate 23 are closed together along a first direction F1 to form a sealed cavity 20. In the open state, the detection tray 22 and the detection cover plate 23 are separated from each other. Thus, the drive unit drives the detection component 2 to switch between the sealed and open states, facilitating the placement of the battery to be tested within the sealed cavity 20.

[0056] Optionally, the aforementioned testing tray can be made of polyoxymethylene (POM, a thermoplastic engineering plastic with high crystallinity). In this way, by utilizing the material properties of polyoxymethylene, such as smooth and glossy surface, hard and dense structure, low water absorption and solvent resistance, residual electrolyte on the surface of the testing tray can be effectively avoided, thereby improving the detection accuracy of the testing equipment.

[0057] Preferably, such as Figure 1 As shown, the aforementioned detection component 2 may further include a mounting frame 21, which may include a base 211 and a support 212 fixedly connected to each other. The base 211 and the support 212 are arranged opposite to each other along a first direction F1. The driving unit includes a first driving member 261 and a second driving member 262. The first driving member 261 is disposed between the support 212 and the detection cover plate 23, and the first driving member 261 drives the detection cover plate 23 and the support 212 to drive the detection cover plate 23 to move along the first direction F1. The second driving member is disposed between the detection tray 22 and the base 211, and the second driving member 262 drives the detection tray 22 and the base 211 to drive the detection tray 22 to move along a second direction F2, such as... Figure 3As shown in the figure, the structure of the detection component 2 in the open state is illustrated. Thus, through the cooperative arrangement of the first drive member 261 and the second drive member 262, the detection tray 22 can be offset relative to the detection cover 23 in the second direction F2 when the detection component 2 is in the open state. This greatly expands the operating space for placing the battery to be tested, facilitating the automated placement of the battery (for example, the placement operating space can meet the needs of a robot or robotic arm to perform the battery placement operation).

[0058] Optionally, the first driving component 261 and the second driving component 262 can both be linear drive devices such as cylinders or electric cylinders.

[0059] like Figures 1 to 6 As shown in the figure, F1 can be an example of the first direction F1 mentioned above, and F2 can be an example of the second direction F2 mentioned above, wherein the first direction F1 and the second direction F2 intersect. Preferably, the first direction F1 is perpendicular to the second direction F2 to accommodate the structure of most square batteries. For ease of description, the direction perpendicular to the plane defined by both the first direction F1 and the second direction F2 is defined as the third direction F3, and F3 shown in the figure can be an example of the third direction F3 mentioned above. When the battery leakage detection device is in use, the first direction F1 can be parallel to the direction of gravity, thereby improving the stability of the detection tray 22 supporting the battery to be tested.

[0060] Preferably, such as Figure 3 As shown, the size of the base 211 in the second direction F2 is larger than the size of the bracket 212 in the second direction F2, and the difference between the size of the base 211 and the bracket 212 in the second direction F2 is greater than or equal to the size of the detection tray 22 in the second direction F2. The bracket 212 can be disposed at one end of the base 211 in the second direction F2. Thus, along the first direction F1, the portion of the mounting frame 21 with the base 211 exposed by the bracket 212 has sufficient space to accommodate the detection tray 22, ensuring that the detection tray 22 can fully extend relative to the bracket 212, further improving the convenience of placing and removing batteries under test in the battery leakage detection device.

[0061] Optionally, such as Figure 1 and Figure 3 As shown, the aforementioned mounting frame 21 may also include a support leg, which is disposed on the side of the base 211 opposite to the support 212. Thus, when the mounting frame 21 is disposed on the operating table 121, the base 211 and the operating table 121 can form a pipe-laying space through the support leg, so that the detection pipe 4 and the purging pipe 3 can be connected to the detection component 2.

[0062] Preferably, such as Figure 3 As shown, the detection component 2 may also include a reflection sensor 24, which is mounted on the bracket 212. When the detection component 2 is in the open state, the reflection sensor 24 is positioned opposite to the detection tray 22 to collect loading information of the detection tray 22.

[0063] Preferably, such as Figure 3 As shown, the detection component 2 may also include a through-beam sensor 25, which is disposed on the base 211. When the detection component 2 is in the open state, the through-beam sensor 25 is disposed on the side of the detection tray 22 and is disposed along the diagonal of the detection tray 22 to determine the position information of the battery to be tested in the detection tray 22 (e.g., whether the battery to be tested is laid flat).

[0064] Preferably, such as Figure 3 As shown, the detection tray 22 can be rectangular, and the through-beam sensor 25 can be arranged along the diagonal of the rectangle to improve the sensitivity and accuracy of the through-beam sensor 25 in detecting whether the battery to be tested in the detection tray 22 is placed flat.

[0065] In an embodiment, such as Figures 1 to 4 As shown, the aforementioned battery leakage detection equipment may further include a housing 11 and a platform 12. An operating table 121 is provided at the upper end of the platform 12 in the first direction F1, and a storage tank 122 is provided below the operating table 121. The aforementioned detection component 2, the aforementioned detection pipeline 4, and the detector 5 are all disposed on the operating table 121. The aforementioned purging pipeline 3 is disposed within the aforementioned storage tank 122. The housing 11 covers the operating table 121.

[0066] Optionally, such as Figure 2 As shown, the battery leakage detection device may also include an exhaust fan 13, which may be installed on the top of the cover 11 to ventilate the internal space of the cover and ensure the cleanliness of the gas inside the cover 11.

[0067] Optionally, such as Figure 1 and Figure 2 As shown, the aforementioned housing 11 may be equipped with a control panel 111, which may be communicatively connected to the aforementioned first drive component 261, second drive component 262, pressure regulating valve 321, first proportional valve 322, second proportional valve 421, cleaning control valve 432, three-way control valve 44, reflection sensor 24, and through-beam sensor 25.

[0068] Based on the features described above, Figures 1 to 6 The following description uses a battery leakage detection device as an example. The workflow of the battery leakage detection device will be described in detail below: Initialization: Adjust the detection component 2 to the open state, open the positive pressure air source section and the cleaning control valve 432, and adjust the three-way control valve 44 to the clean state. That is, the airflow provided by the positive pressure air source section flows through the filter main road 31-cleaning branch road 33-cleaning branch road 43-inlet branch road 42 in sequence to the sealing chamber 20 and is discharged. After the predetermined purging time, close the positive pressure air source section and the cleaning control valve 432. Placement: The battery to be tested is placed in the predetermined position of the test tray 22. The aforementioned reflection sensor 24 and through-beam sensor 25 respectively send detection signals to the control panel 111. The operator modulates the posture of the battery to be tested according to the detection signals until both the reflection sensor 24 and through-beam sensor 25 issue an OK signal (i.e., the test tray 22 has the battery to be tested and the battery to be tested is flat). The control panel 111 sends a closing signal to the first drive member 261 and the second drive member 262. The second drive member 262 drives the test tray 22 to move inward along the second direction F2 until it is aligned with the test cover plate 23. The second drive member 262 drives the test cover plate 23 to fall until the test cover plate 23 and the test tray 22 are closed and sealed. To maintain negative pressure, activate the negative pressure drive unit, evacuate the sealed cavity 20, maintain the pressure for a certain period of time, and then deactivate the negative pressure drive unit. Positive pressure purging: Open the positive pressure air source section, adjust the three-way control valve 44 to the detection state, and adjust the flow of the pressure regulating valve 321, the first proportional valve 322 and the second proportional valve 421 so that the airflow provided by the positive pressure air source section passes through the filter main road 31-purging branch road 32-inlet branch road 42-detection branch road 41 in sequence and flows to the detector 5 for detection. The detector 5 detects the airflow flowing into the detection branch 41 and transmits the results to the control panel 111.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery leakage detection device, characterized in that, It includes a detection component (2), a negative pressure pipeline, a purging pipeline (3), a detection pipeline (4), and a detector (5); The detection component (2) is provided with a sealed cavity (20) for placing the battery to be tested. The negative pressure pipeline, the purge pipeline (3) and the detection pipeline (4) can be connected to the sealed cavity (20) respectively. When the negative pressure pipeline is connected to the sealing cavity (20), the negative pressure pipeline can make the sealing cavity (20) form a negative pressure; The detector (5) is connected to the sealed cavity (20) via the detection pipeline (4) so ​​that the airflow blown into the sealed cavity (20) by the purge pipeline (3) enters the detector (5) via the detection pipeline (4).

2. The battery leakage detection device according to claim 1, characterized in that, It also includes a positive pressure gas source section for supplying gas to the purging pipeline (3); The purging pipeline (3) includes a filter main pipeline (31) and a filter assembly. The first end of the filter main pipeline (31) is connected to the positive pressure gas source section, and the filter assembly is disposed on the filter main pipeline (31).

3. The battery leakage detection device according to claim 2, characterized in that, The purging pipeline (3) also includes a purging branch (32), a pressure regulating valve (321) and a first proportional valve (322). The purging branch (32) is connected to the second end of the filter main pipeline (31) and the sealing cavity (20), and the pressure regulating valve (321) and the first proportional valve (322) are connected to the purging branch (32) in sequence.

4. The battery leakage detection device according to claim 2, characterized in that, The purging pipeline (3) also includes a cleaning branch (33), which connects the second end of the main filtration pipeline (31) and the detection pipeline (4) to deliver clean air filtered by the main filtration pipeline (31) to the detection pipeline (4) for purging.

5. The battery leakage detection device according to claim 2, characterized in that, The filtration assembly includes an air source triplet (301), a dryer (302), and a deodorizing filter (303) connected in sequence to the main filtration path (31).

6. The battery leakage detection device according to claim 4, characterized in that, The detection pipeline (4) includes a detection branch (41), a cleaning branch (43), an air intake branch (42), and a three-way control valve (44). The three-way control valve (44) connects the detection branch (41), the cleaning branch (43), and the air intake branch (42) to control the detection pipeline (4) to switch between a cleaning state and a detection state. When the detection pipeline (4) is in the clean state, the clean branch (43) is connected to the air intake branch (42), and when the detection pipeline (4) is in the detection state, the air intake branch (42) is connected to the detection branch (41). The detection branch (41) is connected to the detector (5); The intake branch (42) connects the sealing cavity (20) and the three-way control valve (44). The cleaning branch (43) is connected to the sweeping branch (33) and the three-way control valve (44).

7. The battery leakage detection device according to claim 6, characterized in that, The detection pipeline (4) also includes: A flow meter (411) is installed in the detection branch (41). And / or, a second proportional valve (421) is provided in the intake branch (42).

8. The battery leakage detection device according to claim 6, characterized in that, The cleaning branch (43) further includes a cavity cleaning branch (431) and a cavity control valve. The cavity cleaning branch (431) connects the sealed cavity (20) and the cleaning branch (43). The cavity control valve is located in the cavity cleaning branch (431). And / or, the detection line (4) is formed by connecting a transparent PTFE tube and a metal connector.

9. The battery leakage detection device according to any one of claims 1 to 8, characterized in that, The detection component (2) includes a drive unit, a detection tray (22) and a detection cover plate (23). The drive unit is connected to at least one of the detection tray (22) and the detection cover plate (23) to drive the detection component (2) to switch between a sealed state and an open state. The battery leakage detection device has a first direction (F1). When the detection component (2) is in the sealed state, the detection tray (22) and the detection cover plate (23) close to each other along the first direction (F1) to form the sealed cavity (20). When the detection component (2) is in the open state, the detection tray (22) and the detection cover (23) are separated from each other.

10. The battery leakage detection device according to claim 9, characterized in that, The detection component (2) further includes a mounting frame (21), which includes a base (211) and a support (212) fixedly connected to each other. The base (211) and the support (212) are arranged opposite to each other along the first direction (F1). The battery leakage detection device also has a second direction (F2) perpendicular to the first direction (F1). The drive unit includes a first drive member (261) and a second drive member (262); The first driving member (261) is connected to the detection cover plate (23) and the bracket (212) to drive the detection cover plate (23) to move along the first direction (F1); The second drive unit (262) is connected to the detection tray (22) and the base (211) to drive the detection tray (22) to move along the second direction (F2).

11. The battery leakage detection device according to claim 10, characterized in that, The testing tray (22) is made of polyoxymethylene material.

12. The battery leakage detection device according to claim 10, characterized in that, The detection component (2) further includes: A reflection sensor (24) is disposed on the bracket (212). When the detection component (2) is in the open state, the reflection sensor (24) is disposed opposite to the detection tray (22) to collect the loading information of the detection tray (22). A through-beam sensor (25) is disposed on the base (211). When the detection component (2) is in the open state, the through-beam sensor (25) is disposed on the side of the detection tray (22) and the through-beam sensor (25) is disposed along the diagonal of the detection tray (22) to determine the position information of the battery to be tested in the detection tray (22).

Images