Leakage detection mechanism

Abstract

The utility model provides a leak detection mechanism which comprises a bottom plate, a sealing cover, a sealing cover lifting driving device, at least one layer of battery cell carrying disc, a mounting frame and a sealing cover guide column assembly, the battery cell carrying disc is arranged on the bottom plate and used for placing battery cells, and the sealing cover is arranged above the bottom plate through the sealing cover guide column assembly and used for lifting the sealing cover. The sealing cover lifting driving device is used for driving the sealing cover to seal the battery cell carrying disc on the bottom plate, at least one battery cell placing groove is formed in the battery cell carrying disc, and a gas detection device is arranged on the bottom plate and is used for detecting whether air in the sealing cover contains electrolyte molecules or not. By combining the sealing cover, the lifting driving device, the battery cell carrying disc and the gas detection technology, efficient, lossless and accurate leakage detection of the battery cell is achieved, and the high-standard requirement of the new energy industry for the quality of the battery cell is met.

Description

Technical Field

[0001] This application relates to the field of battery cell leak detection equipment, and particularly to a leak detection mechanism. Background Art

[0002] With the rapid development of the new energy industry, lithium-ion batteries, as important energy storage components, have been widely used in fields such as electric vehicles, energy storage systems, and portable electronic devices. However, the safety and reliability of lithium-ion batteries have always been the focus of the industry. Among them, the sealing performance of the battery cell is directly related to the performance, lifespan, and safety of the battery. During the production, assembly, and use of the battery cell, if there are tiny leaks, it will not only lead to the loss of electrolyte, affecting the battery capacity and cycle life, but also may cause safety problems such as short circuits and thermal runaway.

[0003] Traditional battery cell leak detection methods mostly rely on visual inspection, pressure testing, or water immersion methods, etc. These methods have disadvantages such as low detection accuracy, low efficiency, and potential damage to the battery cell, and it is difficult to meet the current demand for high-quality and high-efficiency detection of battery cells. Visual inspection is limited by the resolution of the human eye and it is difficult to detect tiny leaks; although pressure testing can detect large-area leaks, it is not sensitive to tiny leaks; while the water immersion method may cause long-term damage to the battery cell due to water residue. Utility Model Content

[0004] The purpose of this application is to provide a leak detection mechanism, which realizes efficient, non-destructive, and accurate leak detection of battery cells by combining a sealing cover, a lifting drive device, a battery cell carrier plate, and gas detection technology.

[0005] To achieve the above purpose, this application provides the following technical solutions:

[0006] A leak detection mechanism includes a bottom plate, a sealing cover, a sealing cover lifting drive device, at least one layer of battery cell carrier plates, a mounting rack, and a sealing cover guide post assembly. The battery cell carrier plate is arranged on the bottom plate and is used for placing battery cells. The sealing cover is arranged above the bottom plate through the sealing cover guide post assembly. The sealing cover lifting drive device is used to drive the sealing cover to seal the battery cell carrier plate on the bottom plate. At least one battery cell placement groove is arranged on the battery cell carrier plate, and a gas detection device is arranged on the bottom plate for detecting whether the air in the sealing cover contains electrolyte molecules.

[0007] A further preferred solution of the present utility model is that through holes are arranged in the battery cell placement groove.

[0008] A further preferred solution of the present utility model is that foam is arranged in the battery cell placement groove.

[0009] A further preferred solution of the present utility model is that the battery cell carrier tray is provided with four layers, and each layer of the battery cell carrier tray is connected by a connecting column, and each layer of the battery cell carrier tray is locked by a height adjustment locking member.

[0010] A further preferred solution of the present utility model is that the height adjustment locking member has a locking groove, and the height adjustment locking member is locked to the side of the battery cell carrier tray by a locking bolt passing through the locking groove.

[0011] The beneficial effects of this application are as follows:

[0012] (1) By constructing a closed detection environment jointly formed by a sealing cover and a bottom plate, and combining with a gas detection device (such as a mass spectrometer, a sensor, etc.), this mechanism can achieve high-precision detection of micro-leaks of battery cells. This detection method overcomes the limitation of low detection accuracy of traditional methods, can effectively identify difficult-to-detect micro-leakage points, and improves product quality and safety.

[0013] (2) The introduction of the sealing cover lifting drive device in this application enables the sealing cover to lift quickly and accurately to complete the sealing and release operations, shortening the detection cycle. At the same time, combined with the automated gas injection, detection and exhaust processes, the entire detection process operates efficiently, improves the detection efficiency, and meets the requirements for rapid detection of battery cells in large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a leak detection mechanism provided by an embodiment of this application;

[0015] Figure 2 It is a schematic structural diagram of a leak detection mechanism provided by an embodiment of this application; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The terms used in the embodiment part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The implementation manners of the embodiments of this application will be described in detail below with reference to the drawings.

[0017] As Figure 1 shown, in this embodiment, the leak detection mechanism includes a bottom plate 41, a sealing cover 42, a sealing cover lifting drive device 43, at least one layer of battery cell carrier tray 44, a mounting bracket 45 and a sealing cover guide post assembly 46. The battery cell carrier tray 44 is arranged on the bottom plate 41 and is used for placing battery cells. The sealing cover 42 is arranged above the bottom plate 41 through the sealing cover guide post assembly 46. The sealing cover lifting drive device 43 is used to drive the sealing cover 42 to seal the battery cell carrier tray 44 on the bottom plate 41. A gas detection device is arranged on the bottom plate for detecting whether the air in the sealing cover contains electrolyte molecules.

[0018] Leak detection process:

[0019] First, the sealing cover 42 descends under the drive of the sealing cover lifting drive device 43, completely sealing the battery cell carrier tray 44 on the bottom plate 41. Subsequently, the evacuation mechanism of the battery cell carrier tray 44 performs an evacuation operation to remove the air inside the sealing cover 42, creating a sealed detection environment. Then, the pressure holding stage ensures the stability of the pressure inside the sealing cover 42, reducing external interference. Next, clean gas (such as nitrogen or helium) is introduced, which does not react with the electrolyte and is used for detection purposes. Finally, a gas detection device (such as a mass spectrometer, sensor, etc.) is used to detect whether the air inside the sealing cover 42 contains electrolyte molecules, thereby determining whether there is a leak in the battery cell. By means of evacuation and pressure holding measures, as well as introducing clean gas for detection, the accuracy and precision of the detection can be significantly improved, effectively identifying tiny leak points.

[0020] As Figure 2 shown, in this embodiment, at least one battery cell placement groove 441 is provided on the battery cell carrier tray 44. Specifically, the battery cell carrier tray 44 in this embodiment is provided with 4 battery cell placement grooves 441.

[0021] As Figure 2 shown, in this embodiment, through holes 442 are provided in the battery cell placement grooves 441. The through holes 442 allow gas to flow freely. When the battery cell leaks liquid, the leaked electrolyte or other volatile substances can quickly diffuse through the through holes 442 to the external space of the battery cell placement groove 441. This helps the detection device capture these leakage substances faster, thereby improving the sensitivity and timeliness of the detection.

[0022] The presence of the through holes 442 makes it easier for any residues in the battery cell placement grooves 441, such as electrolyte, impurities, etc., to be washed away or discharged through the air flow during the cleaning process. This avoids these residues causing secondary contamination to the battery cell carrier tray 44 or affecting the subsequent detection accuracy.

[0023] As Figure 2 shown, in this embodiment, foam 443 is provided in the battery cell placement grooves 441. The foam 443 can also buffer and reduce the impact and vibration that may occur during the placement and movement of the battery cell to a certain extent, protecting the battery cell.

[0024] As Figure 2 shown, in this embodiment, the battery cell carrier tray 44 is provided with four layers. Each layer of the battery cell carrier tray 44 is connected by a connecting column 444, and each layer of the battery cell carrier tray 44 is locked by a height adjustment locking member 445. The design of the height adjustment locking member 445 allows the user to flexibly adjust the distance between two layers of the battery cell carrier trays 44 according to the different sizes or requirements of the battery cells. This adjustability increases the versatility and adaptability of the device, enabling it to be compatible with battery cells of various specifications.

[0025] like Figure 2 As shown, in this embodiment, the height adjustment locking member 445 has a locking groove, and the height adjustment locking member 445 is locked to the side of the battery carrier 44 by passing the locking bolt through the locking groove. The locking bolt passes through the locking groove and is locked to the side of the battery carrier 44, ensuring the stability of the two-layer battery carrier 44 after the height is adjusted. This locking mechanism effectively prevents the battery carrier 44 from shifting or shaking during use, ensuring the stable placement of the battery.

[0026] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0027] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0028] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leak detection mechanism, characterized in that: It includes a bottom plate, a sealing cover, a sealing cover lifting drive device, at least one layer of battery cell carrier trays, a mounting rack and a sealing cover guide post assembly. The battery cell carrier trays are arranged on the bottom plate and used for placing battery cells. The sealing cover is arranged above the bottom plate through the sealing cover guide post assembly. The sealing cover lifting drive device is used to drive the sealing cover to seal the battery cell carrier trays on the bottom plate. At least one battery cell placement groove is arranged on the battery cell carrier trays. A gas detection device is arranged on the bottom plate and used to detect whether the air in the sealing cover contains electrolyte molecules.

2. The leak detection mechanism according to claim 1, wherein: Through holes are arranged in the battery cell placement grooves.

3. The leak detection mechanism according to claim 1, characterized in that: Foam is arranged in the battery cell placement grooves.

4. A leak detection mechanism according to claim 1, characterized in that: Four layers of battery cell carrier trays are arranged. Each layer of battery cell carrier trays is connected by a connecting column, and each layer of battery cell carrier trays is locked by a height adjustment locking part.

5. A leak detection mechanism according to claim 4, characterized in that: The height adjustment locking part has a locking groove, and the height adjustment locking part is locked to the side of the battery cell carrier tray by a locking bolt passing through the locking groove.

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