Reusable lithium ion battery electrolyte standard drain

Abstract

The utility model discloses a reusable lithium ion battery electrolyte standard leakage and relates to the field of lithium ion batteries. The lithium ion battery electrolyte standard drain comprises a standard drain body and a breathable current stabilization assembly, wherein a liquid storage cavity is formed in the standard drain body; a vent hole is formed in the leakage mark body, and the liquid storage cavity is communicated with the outside of the leakage mark body through the flow stabilizing hole; the ventilation flow stabilizing assembly is mounted in the ventilation opening; a liquid injection opening communicated with the liquid storage cavity is formed in the leakage marking body, a sealing assembly corresponding to the liquid injection opening is arranged on the liquid injection opening, and the sealing assembly comprises a plugging component; the blocking component is of a multi-layer structure and comprises an anti-seepage sealing layer, a blocking layer and a tough abrasion-resistant layer from inside to outside, and the blocking layer is used for blocking gas and water vapor. According to the utility model, the electrolyte can be used as a calibration object, the current stabilization effect is realized through the breathable current stabilization assembly, and the accuracy and reliability of the current leakage detection equipment are improved; and by arranging the liquid injection port and the plugging component, the label leakage can be repeatedly used, and the good leakproofness is kept.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion batteries, specifically to a reusable lithium-ion battery electrolyte level. Background Technology

[0002] Lithium-ion batteries possess advantages such as high energy density, high voltage, environmental friendliness, long lifespan, and fast charging capabilities, leading to their widespread application in portable devices, electric vehicles, and energy storage systems. During application, the safety of lithium-ion batteries is of paramount importance. Whether the lithium-ion electrolyte leaks is currently one of the primary safety assessment criteria for lithium-ion batteries. Currently, mass spectrometry leak detectors / equipment are commonly used for detecting lithium-ion battery electrolyte leaks; however, existing mass spectrometry leak detectors / equipment do not currently have standard leak detectors available for calibration, standardization, and spot checks.

[0003] Currently, lithium-ion battery volatile organic compound (VOC) leak detectors / equipment are calibrated, standardized, or inspected using isobutylene gas of known concentrations, rather than directly using the electrolyte of the tested material. However, due to the varying ionization efficiencies of different substances, calibration, or inspection using isobutylene gas is inaccurate. Therefore, there is a need to develop a standard leak detector that uses the electrolyte as a calibration material to improve the accuracy of VOC leak detector / equipment calibration / standardization. Utility Model Content

[0004] To address the problems existing in the prior art, a reusable lithium-ion battery electrolyte calibrator is provided. Using the electrolyte as a calibrator improves the accuracy and reliability of calibration, standardization, and inspection. Furthermore, by adding new electrolyte to the storage chamber through the injection port, the calibrator can be reused.

[0005] This utility model provides the following technical solution:

[0006] This invention proposes a reusable lithium-ion battery electrolyte leveling leak, comprising a leveling leak body and a venting and flow-stabilizing component. The leveling leak body has a liquid storage chamber; the leveling leak body has a vent, and the liquid storage chamber is connected to the outside of the leveling leak body through the vent; the venting and flow-stabilizing component is installed inside the vent; the leveling leak body has an injection port connected to the liquid storage chamber, and the injection port is provided with a sealing component corresponding to the injection port. The sealing component includes a plugging component; the plugging component has a multi-layer structure, and from the inside out, the plugging component includes a seepage-proof sealing layer, a barrier layer, and a tough and wear-resistant layer. The barrier layer is used to block gas and water vapor.

[0007] Furthermore, the thickness of the barrier layer is greater than or equal to 0.02 mm.

[0008] Furthermore, the sealing assembly also includes a fastening component, which is connected to the plugging component and is used to fasten the plugging component inside the injection port.

[0009] Preferably, the fastening component is sleeved on the outside of the sealing component.

[0010] Preferably, the material of the waterproof sealing layer is selected from one of the following: polyvinyl butyral (PVB resin), nano aluminum foil, nano sponge, waterproof melamine foam, high-temperature nylon (PPA), polyethylene, polytetrafluoroethylene, polyvinyl chloride, polypropylene, pressure-sensitive adhesive, and fluorinated materials.

[0011] Preferably, the barrier layer is a metallic material or a non-metallic material; the metallic material is selected from aluminum, stainless steel, copper, iron, magnesium, and alloys of the above metals; the non-metallic material is a hard plastic.

[0012] Preferably, the tough and wear-resistant layer is made of one of the following materials: modified epoxy resin, nylon (polyamide), polyoxymethylene (POM), polyterephthalic acid plastics, and polycarbonate (PC). Preferably, the polyterephthalic acid plastic is polyethylene terephthalate (PET).

[0013] Preferably, the connection method between the seepage-proof sealing layer and the barrier layer is selected from one of pressing, hot melt bonding, material-modified bonding, adhesive bonding, mechanical connection and welding; the connection method between the barrier layer and the tough and wear-resistant layer is selected from one of adhesive bonding, material-modified bonding, mechanical connection and welding.

[0014] Furthermore, the gas-permeable and flow-stabilizing component is a membrane component or a perforated component, which allows the electrolyte gas to overflow at a stable rate.

[0015] Preferably, the breathable flow stabilizing component is a membrane component, the membrane component includes a flow stabilizing membrane, the flow stabilizing membrane includes a high-strength support layer and an organic gas diffusion layer; the organic gas diffusion layer permeates into the high-strength support layer to form a permeation composite layer, the thickness of the permeation composite layer is 0%-100% of the thickness of the high-strength support layer.

[0016] Preferably, the organic gas diffusion layer has two layers, and the high-strength support layer is located between the two organic gas diffusion layers.

[0017] Preferably, the flow stabilizing membrane further includes an adhesive layer, which is connected to a high-strength support layer; the high-strength support layer is located between the adhesive layer and the organic gas diffusion layer.

[0018] Preferably, the adhesive layer comprises two layers, with the high-strength support layer and the organic gas diffusion layer located between the two adhesive layers.

[0019] Preferably, the material of the organic gas diffusion layer is selected from one of perfluorosulfonic acid resin, polymethylpentene, polyimide and graphene oxide.

[0020] Preferably, the high-strength support layer is made of a material selected from polyamide, polyolefin, and polytetrafluoroethylene.

[0021] Preferably, the adhesive layer is made of one of epoxy resin, silicone, fluorinated rubber, and acrylic adhesive.

[0022] Preferably, the thickness of the organic gas diffusion layer is 0.01mm-5mm; the thickness of the high-strength support layer is 0.1mm-5mm; and the thickness of the adhesive layer is 0.1mm-3mm.

[0023] Preferably, the membrane assembly further includes a support plate, which is disposed at the upper and lower ends of the flow stabilizing membrane, and the support plate has a first through hole.

[0024] Preferably, the breathable flow stabilizing component is a small-hole component, which has a flow stabilizing hole communicating with the liquid storage chamber, and the inner diameter of the flow stabilizing hole is 0.002mm-1mm.

[0025] Preferably, the orifice assembly is a small orifice sheet structure, and the inner diameter of the flow stabilizing orifice is 0.002mm-0.6mm.

[0026] Preferably, the orifice assembly is a capillary structure, and the inner diameter of the flow stabilizing orifice is 0.01mm-1.0mm.

[0027] Preferably, a waterproof and breathable membrane is provided between the orifice assembly and the liquid storage chamber.

[0028] Furthermore, the lithium-ion battery electrolyte leakage indicator also includes a connecting and fixing mechanism, which is installed inside the vent. The connecting and fixing mechanism is provided with a second through hole, and the venting and flow stabilizing component is installed on the connecting and fixing mechanism and installed inside the vent through the connecting and fixing mechanism.

[0029] Furthermore, the lithium-ion battery electrolyte leak indicator also includes a leak indicator cap, which is placed above the ventilated current stabilizing component to seal the leak indicator.

[0030] This utility model has the following beneficial technical effects:

[0031] This invention presents a reusable lithium-ion battery electrolyte leak indicator with a simple structure. It allows for the calibration, standardization, and inspection of lithium-ion battery leak detection devices using electrolyte. A ventilated flow stabilizing component ensures stable flow, improving the accuracy and reliability of calibration, standardization, and inspection of existing lithium-ion battery leak detection devices. The inclusion of an injection port allows electrolyte to be injected into the storage chamber, enabling repeated use of the lithium-ion battery electrolyte leak indicator. A multi-layered sealing structure, utilizing a leak-proof sealing layer that deforms under pressure, achieves a seal while preventing electrolyte leakage or seepage from the injection port. A barrier layer prevents external air and moisture from entering the storage chamber and affecting test results. A tough, wear-resistant layer protects the barrier layer from external mechanical or physical damage. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 An exploded view of the reusable lithium-ion battery electrolyte leak indicator structure provided in Embodiment 1 of this utility model.

[0034] Figure 2 This is a structural diagram of the sealing component provided in Embodiment 1 of this utility model.

[0035] Figure 3 This is a structural diagram of the flow stabilizing membrane provided in Embodiment 1 of this utility model.

[0036] Figure 4 This is a structural diagram of the flow stabilizing membrane provided in Embodiment 2 of this utility model.

[0037] Figure 5 This is a structural diagram of the small hole assembly provided in Embodiment 3 of this utility model.

[0038] Figure 6 This is a structural diagram of the small hole assembly provided in Embodiment 4 of this utility model.

[0039] Explanation of the markings in the image:

[0040] 1-Leakage indicator body; 2-Liquid storage chamber; 3-Sealing ring; 4-Connecting and fixing mechanism; 401-First through hole; 5-Support plate; 501-First through hole; 6-Flow stabilizing membrane; 601-Organic gas diffusion layer; 602-High-strength support layer; 603-Permeable composite layer; 604-Adhesive layer; 7-Sealing component; 701-Leak-proof sealing layer; 702-Barrier layer; 703-Tough and wear-resistant layer; 8-Fasteners; 9-Leakage indicator cover; 10-Ventilation port; 11-Ventilation hole; 12-Injection port; 13-Small hole assembly. Detailed Implementation

[0041] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0043] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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 utility model.

[0044] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] Example 1

[0046] Please see Figure 1The reusable lithium-ion battery electrolyte leveling device shown includes a leveling device body 1 and a venting and flow stabilizing assembly. The leveling device body 1 has a storage chamber 2; a vent 10 is provided on the leveling device body 1, through which the storage chamber 2 communicates with the outside of the leveling device body 1; the venting and flow stabilizing assembly is installed inside the vent 10; the leveling device body 1 has an injection port 12 communicating with the storage chamber 2, and a sealing assembly corresponding to the injection port is provided on the injection port 12. The sealing assembly includes a plugging component 7; the plugging component 7 has a multi-layer structure, please refer to [reference needed]. Figure 2 The sealing component 7 includes, from the inside out, an impermeable sealing layer 701, a barrier layer 702, and a tough and wear-resistant layer 703; the barrier layer 702 is used to block gas and water vapor.

[0047] Specifically, in this embodiment, the thickness of the barrier layer 702 is 0.02 mm.

[0048] Specifically, in this embodiment, the sealing assembly also includes a fastening component 8, which is sleeved on the outside of the sealing component 7 and can fasten the sealing component 7 inside the injection port 12.

[0049] Specifically, in this embodiment, the material of the seepage-proof sealing layer 701 is polyethylene.

[0050] Specifically, in this embodiment, the barrier layer 702 is made of aluminum alloy.

[0051] Specifically, in this embodiment, the tough and wear-resistant layer 703 is made of nylon.

[0052] Specifically, in this embodiment, the gas-permeable flow-stabilizing component is a membrane component, which includes a flow-stabilizing membrane 6 and a support plate 5. The support plate 5 is disposed at both ends of the flow-stabilizing membrane 6, and a plurality of first through holes 501 are formed on the support plate 5 to allow electrolyte gas to pass through the support plate 5; please refer to further details. Figure 3 The flow stabilizing membrane 6 includes a high-strength support layer 602 and an organic gas diffusion layer 601; the organic gas diffusion layer 601 permeates into the high-strength support layer 602 to form a permeation composite layer 603, and the thickness of the permeation composite layer 603 accounts for 60% of the thickness of the high-strength support layer 602.

[0053] Specifically, in this embodiment, the material of the organic gas diffusion layer 601 is polymethylpentene.

[0054] Specifically, in this embodiment, the high-strength support layer 602 is made of polyamide.

[0055] Specifically, in this embodiment, the thickness of the organic gas diffusion layer 601 is 1 mm; the thickness of the high-strength support layer 602 is 1 mm.

[0056] Specifically, it also includes a connecting and fixing mechanism 4, which has a second through hole 401; the connecting and fixing mechanism 4 is installed inside the vent 10, and the membrane module is installed on the connecting and fixing mechanism 4 and installed inside the vent 10 through the connecting and fixing mechanism 4.

[0057] Specifically, a sealing ring 3 is provided between the connecting and fixing mechanism 4 and the vent.

[0058] Specifically, the second through hole 401, the first through hole 501, and the flow stabilizing membrane 6 in the vent 10 form a gas evaporation path, through which electrolyte gas can evaporate from the storage chamber to the outside of the leak.

[0059] Specifically, it also includes a leak indicator cover 9, which is placed on top of the ventilated flow stabilizing assembly to seal the leak indicator.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 lies in the different flow stabilizing membrane 6 and the sealing component 7.

[0062] Specifically, in the sealing component 7 of this embodiment, the anti-seepage sealing layer 701 is made of nano-aluminum foil; the barrier layer 702 is made of copper and has a thickness of 0.05mm; the tough and wear-resistant layer 703 is made of PC.

[0063] For details, please refer to Figure 4 In this embodiment, the flow stabilizing membrane 6 includes a high-strength support layer 602, an organic gas diffusion layer 601, and an adhesive layer 604; the adhesive layer 604 is connected to the high-strength support layer 602; the high-strength support layer 602 is located between the adhesive layer 604 and the organic gas diffusion layer 601; the organic gas diffusion layer 601 permeates into the high-strength support layer 602 to form a permeation composite layer 603, and the thickness of the permeation composite layer 603 accounts for 50% of the thickness of the high-strength support layer 602.

[0064] Specifically, in this embodiment, the organic gas diffusion layer 601 is made of perfluorosulfonic acid resin; the high-strength support layer 602 is made of polyolefin; and the adhesive layer 604 is made of fluorinated rubber.

[0065] Specifically, in this embodiment, the thickness of the organic gas diffusion layer 601 is 0.2; the thickness of the high-strength support layer 602 is 0.3; and the thickness of the adhesive layer 604 is 0.1.

[0066] Example 3

[0067] The difference between this embodiment and Embodiment 1 is that the breathable and flow-stabilizing component is a small-hole component. Please refer to [link / reference] for details. Figure 5In this embodiment, the orifice assembly 13 is an orifice sheet structure. The orifice assembly 13 is provided with a flow stabilizing hole 11 that communicates with the liquid storage chamber 2. The inner diameter of the flow stabilizing hole 11 is 0.02 mm and the depth of the flow stabilizing hole 11 is 0.02 mm.

[0068] Specifically, in this embodiment, a waterproof and breathable membrane is also provided between the small hole assembly 13 and the liquid storage chamber 2.

[0069] Example 4

[0070] The difference between this embodiment and Embodiment 1 lies in the different air-permeable and flow-stabilizing components and the sealing component 7. Specifically, in the sealing component 7 of this embodiment, the material of the seepage-proof sealing layer 701 is polytetrafluoroethylene; the barrier layer 702 is made of stainless steel and has a thickness of 0.1 mm; the tough and wear-resistant layer 703 is made of modified epoxy resin.

[0071] Specifically, in this embodiment, the breathable and flow-stabilizing component is a perforated component. Please refer to [link / reference] for details. Figure 6 In this embodiment, the orifice assembly 113 is a capillary structure. The orifice assembly 13 is provided with a flow stabilizing hole 11 that communicates with the liquid storage chamber 2. The inner diameter of the flow stabilizing hole 11 is 0.02 mm. The length of the capillary structure orifice assembly 13 is 130 times the inner diameter of the flow stabilizing hole 11.

[0072] Specifically, a waterproof flow stabilizing membrane 6 is provided between the orifice assembly 13 and the liquid storage chamber 2.

[0073] The working principle of this reusable lithium-ion battery electrolyte leak indicator is as follows:

[0074] The electrolyte in the storage chamber evaporates into gas, existing in a gas-liquid coexistence state within the chamber. A lithium-ion battery electrolyte standard leak is placed inside the mass spectrometer chamber, and the chamber is evacuated. Under the pressure difference and the flow stabilization effect of the gas-permeable stabilizing component, the electrolyte gas in the storage chamber evaporates at a stable rate into the mass spectrometer chamber and is detected by the mass spectrometer. The mass spectrometer performs calibration, adjustment, or inspection based on the detected electrical signal intensity and the leakage rate of the lithium-ion battery electrolyte standard leak. When the standard leak exceeds its service life, and the electrolyte or other liquid inside the storage chamber has evaporated completely, the sealing component of the injection port is opened, and new electrolyte or other liquid is added to the storage chamber using a syringe or other means. The injection port sealing component is then reinstalled, and the standard leak can be reused.

[0075] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A reusable lithium-ion battery electrolyte dipstick, characterized in that, The utility model provides a kind of leak detector, including leak detector body and breathable flow stabilizing component, the liquid storage cavity is equipped in the leak detector body;The leak detector body is equipped with breathable port, and the liquid storage cavity is communicated with the outside of leak detector body by breathable port;The breathable flow stabilizing component is installed in breathable port;The leak detector body is further equipped with liquid injection port communicated with the liquid storage cavity, and the liquid injection port is provided with sealing component corresponding to liquid injection port, and the sealing component includes plugging component;The plugging component is multilayer structure, and the plugging component includes anti-seepage sealing layer, barrier layer and toughness wear-resistant layer from inside to outside, and the barrier layer is used to block gas and water vapor.

2. The reusable lithium-ion battery electrolyte dipstick of claim 1, wherein, The thickness of the barrier layer is greater than or equal to 0.02 mm.

3. The reusable lithium-ion battery electrolyte dipstick of claim 1, wherein, The sealing component further includes fastening component, and the fastening component is connected with the plugging component, and the fastening component is used to fasten the plugging component in the liquid injection port.

4. The reusable lithium-ion battery electrolyte dipstick of any one of claims 1-3, wherein, The breathable flow stabilizing component is a membrane component, and the membrane component includes flow stabilizing membrane, and the flow stabilizing membrane includes high-strength support layer and organic gas diffusion layer;The organic gas diffusion layer penetrates into the high-strength support layer to form a penetration composite layer, and the thickness of the penetration composite layer accounts for 0-100% of the thickness of the high-strength support layer.

5. The reusable lithium-ion battery electrolyte dipstick of claim 4, wherein, The flow stabilizing membrane further includes adhesive layer, and the adhesive layer is connected with the high-strength support layer;The high-strength support layer is located between the adhesive layer and the organic gas diffusion layer.

6. The reusable lithium-ion battery electrolyte dipstick of claim 4, wherein, The membrane component further includes support plate, and the support plate is provided at least two and arranged at the upper and lower ends of the flow stabilizing membrane respectively, and the support plate is provided with through hole.

7. The reusable lithium-ion battery electrolyte dipstick of any one of claims 1-3, wherein, The breathable flow stabilizing component is a small hole component, and the small hole component is provided with flow stabilizing hole communicated with the liquid storage cavity, and the inner diameter of the flow stabilizing hole is 0.002-1 mm.

8. The reusable lithium-ion battery electrolyte dipstick of claim 7, wherein, The small hole component is small hole sheet structure, and the inner diameter of the flow stabilizing hole is 0.002-0.6 mm.

9. The reusable lithium-ion battery electrolyte dipstick of claim 7, wherein, The small hole component is capillary structure, and the inner diameter of the flow stabilizing hole is 0.01-1.0 mm.

10. The reusable lithium-ion battery electrolyte dipstick of claim 7, wherein, The small hole component is provided with waterproof and breathable film between the liquid storage cavity.

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