Small-hole type lithium ion battery electrolyte standard drain

Abstract

The utility model discloses a small hole type lithium ion battery electrolyte standard drain, and relates to the technical field of lithium ion batteries. The small hole type lithium ion battery electrolyte standard drain comprises a standard drain body and a small hole assembly, wherein a liquid storage cavity is formed in the standard drain body; the small hole assembly is arranged above the liquid storage cavity, a small hole communicated with the liquid storage cavity is formed in the small hole assembly, and the inner diameter of the small hole ranges from 0.002 mm to 1 mm. According to the utility model, the electrolyte is stored in the liquid storage cavity, the electrolyte is used as a calibration object, and the current stabilization effect is realized through the small hole assembly, so that the electrolyte gas can overflow at a stable rate, and the accuracy and reliability of calibration, calibration and spot inspection of the existing liquid leakage detection equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion batteries, specifically to a small-hole lithium-ion battery electrolyte leveling device. 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 detection equipment calibration / standardization. Utility Model Content

[0004] To address the problems existing in the prior art, a small-hole lithium-ion battery electrolyte leak indicator is provided. The electrolyte is used as the calibrator, and the electrolyte gas can be released at a stable rate through the small-hole assembly, thereby improving the accuracy and reliability of calibration, standardization, and inspection.

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

[0006] This utility model proposes a small-hole type lithium-ion battery electrolyte leveling leak, including a leveling leak body and a small-hole assembly. The leveling leak body has a liquid storage chamber. The small-hole assembly is disposed above the liquid storage chamber and has a small hole communicating with the liquid storage chamber. The inner diameter of the small hole is 0.002mm-1mm.

[0007] Furthermore, the small hole assembly is a small hole sheet structure, and the inner diameter of the small hole is 0.002mm-0.6mm.

[0008] Furthermore, the thickness of the small hole is 0.01mm-5mm.

[0009] Furthermore, the small hole assembly has a capillary structure, and the inner diameter of the small hole is 0.01mm-1.0mm.

[0010] Furthermore, the length of the small hole is 1-500 times the inner diameter of the small hole.

[0011] Furthermore, a waterproof and breathable membrane is provided between the orifice assembly and the liquid storage chamber. The waterproof and breathable membrane is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane is used to prevent liquid electrolyte from entering the orifice.

[0012] Furthermore, it also includes a connecting and fixing mechanism, which is disposed on the leak indicator body and located above the liquid storage chamber; the small hole assembly is installed at the upper end of the connecting and fixing mechanism, and the waterproof and breathable membrane is installed at the lower end of the connecting and fixing mechanism.

[0013] Furthermore, the waterproof and breathable membrane and the perforated assembly are installed on the connecting and fixing mechanism by adhesive or sealing rings; the adhesive and sealing rings are both made of special materials that are resistant to electrolyte swelling, electrolyte corrosion, and electrolyte penetration.

[0014] Furthermore, the connecting and fixing mechanism is provided with a through hole; the upper end of the liquid storage chamber, the waterproof and breathable membrane, the through hole and the small hole form a gas channel.

[0015] Furthermore, it also includes a puncture cover, which is disposed above the orifice assembly.

[0016] Furthermore, it also includes a leak indicator cap, which matches the upper cover of the leak indicator cap and is used to seal the liquid storage cavity.

[0017] This utility model has the following beneficial technical effects:

[0018] This invention features a simple small-hole lithium-ion battery electrolyte leakage indicator structure. It allows for direct calibration, standardization, and inspection of the lithium-ion battery leakage detection device using electrolyte gas. Furthermore, the small-hole assembly's flow stabilization ensures the electrolyte gas evaporates at a stable rate, further improving the accuracy of the detection results. By adjusting the diameter and depth of the hole, this invention can achieve a leakage rate requirement of 2×10⁻⁶. -7 ~1×10 -2 By creating a standard leak between mbar*L / s and calibrating with standard leaks at different leak rate levels, multi-point calibration of the mass spectrometer can be achieved. Attached Figure Description

[0019] 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.

[0020] Figure 1 An exploded view of the electrolyte leak indicator for a small-hole lithium-ion battery provided in Embodiment 1 of this utility model.

[0021] Figure 2 A schematic diagram of the small hole assembly with a small hole sheet structure provided by this utility model.

[0022] Figure 3 A schematic diagram of the capillary-like structure small hole assembly provided by this utility model.

[0023] Explanation of the markings in the image:

[0024] 1-Leakage indicator body; 2-Liquid storage chamber; 3-Waterproof and breathable membrane; 4-Connecting and fixing mechanism; 5-Small hole assembly; 501-Small hole; 6-Leakage indicator cover; 7-Leakage indicator cap. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Example 1

[0030] Please see Figure 1 The small-hole type lithium-ion battery electrolyte indicator shown includes an indicator body 1 and a small-hole assembly 5. The indicator body 1 is provided with a liquid storage chamber 2 for storing electrolyte. The small-hole assembly 5 is located above the liquid storage chamber 2 and has a small hole 501 communicating with the liquid storage chamber 2. The inner diameter of the small hole 501 is 0.2 mm.

[0031] For details, please refer to Figure 2 In this embodiment, the small hole component 5 is a small hole sheet structure.

[0032] Specifically, the thickness of the small hole 501 is 0.2mm.

[0033] Specifically, a waterproof and breathable membrane 3 is provided between the orifice assembly 5 and the liquid storage chamber 2. The waterproof and breathable membrane 3 is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane 3 is used to prevent electrolyte from entering the orifice 501.

[0034] Specifically, it also includes a connecting and fixing mechanism 4, which is set on the leak gauge body 1; a small hole assembly 5 is installed at the upper end of the connecting and fixing mechanism 4, and a waterproof and breathable membrane 3 is installed at the lower end of the connecting and fixing mechanism 4.

[0035] Specifically, in this embodiment, a first sealing ring is provided between the connecting and fixing mechanism 4 and the indicator body 1. A second sealing ring is provided between the connecting and fixing mechanism 4 and the indicator cover 6. The connecting and fixing mechanism 4 and the indicator cover 6 are connected and tightened by threads, pressing and fixing the second sealing ring and the small hole assembly 5 together and sealing them.

[0036] Specifically, the connecting and fixing mechanism 4 is provided with a through hole; the upper end of the liquid storage chamber 2, the waterproof and breathable membrane 3, the through hole and the small hole 501 form a gas channel.

[0037] Specifically, it also includes a top cover 6 for the leak indicator, which is placed on top of the small hole assembly 5. The top cover 6 can press the sealing ring so that the sealing ring abuts against the small hole 501 piece.

[0038] Specifically, it also includes a leak indicator cover 7, which matches the leak indicator cover 6 and is used to seal the liquid storage chamber 2.

[0039] Specifically, in this embodiment, the leakage rate of the electrolyte in the small-aperture lithium-ion battery can be maintained at 1×10⁻⁶. -4 ~1×10 -3 mbar*L / s.

[0040] Example 2

[0041] A small-hole type lithium-ion battery electrolyte leveling device includes a leveling device body 1 and a small-hole assembly 5. The leveling device body 1 has a liquid storage chamber 2 inside. The small-hole assembly 5 is disposed above the liquid storage chamber 2 and has a small hole 501 communicating with the liquid storage chamber 2. The inner diameter of the small hole 501 is 0.6 mm.

[0042] Specifically, the small hole assembly 5 consists of 501 small holes.

[0043] Specifically, the thickness of the small hole 501 is 5mm.

[0044] Specifically, a waterproof and breathable membrane 3 is provided between the orifice assembly 5 and the liquid storage chamber 2. The waterproof and breathable membrane 3 is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane 3 is used to prevent electrolyte from entering the orifice 501.

[0045] Specifically, it also includes a connecting and fixing mechanism 4, which is located above the leak indicator body 1; the small hole assembly 5 is installed on the upper end of the connecting and fixing mechanism 4 with glue, and the waterproof and breathable membrane 3 is installed on the lower end of the connecting and fixing mechanism 4 with glue.

[0046] Specifically, the connecting and fixing mechanism 4 is provided with a through hole; the upper end of the liquid storage chamber 2, the waterproof and breathable membrane 3, the through hole and the small hole 501 form a gas channel.

[0047] Specifically, in this embodiment, the small-hole lithium-ion battery electrolyte leak indicator also includes a leak indicator cover 7 for sealing the liquid storage chamber 2.

[0048] Specifically, in this embodiment, the leakage rate of the electrolyte in the small-aperture lithium-ion battery can be maintained at 1×10⁻⁶. -3 ~1×10 -2 mbar*L / s.

[0049] Example 3

[0050] A small-hole type lithium-ion battery electrolyte leveling device includes a leveling device body 1 and a small-hole assembly 5. The leveling device body 1 has a liquid storage chamber 2 inside. The small-hole assembly 5 is disposed above the liquid storage chamber 2 and has a small hole 501 communicating with the liquid storage chamber 2. The inner diameter of the small hole 501 is 0.002 mm.

[0051] Specifically, the small hole component 5 is a small hole sheet structure.

[0052] Specifically, the thickness of the small hole 501 is 0.01mm.

[0053] Specifically, a waterproof and breathable membrane 3 is provided between the orifice assembly 5 and the liquid storage chamber 2. The waterproof and breathable membrane 3 is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane 3 is used to prevent electrolyte from entering the orifice 501.

[0054] Specifically, it also includes a connecting and fixing mechanism 4, which is located above the indicator body 1; the small hole assembly 5 is installed on the upper end of the connecting and fixing mechanism 4 with glue, and the waterproof and breathable membrane 3 is installed on the lower end of the connecting and fixing mechanism 4 with a sealing ring.

[0055] Specifically, the connecting and fixing mechanism 4 is provided with a through hole; the upper end of the liquid storage chamber 2, the waterproof and breathable membrane 3, the through hole and the small hole 501 form a gas channel.

[0056] Specifically, in this embodiment, the leakage rate of the electrolyte in the small-aperture lithium-ion battery can be maintained at 2×10⁻⁶. -7 ~5×10 -7 mbar*L / s.

[0057] Example 4

[0058] A small-hole type lithium-ion battery electrolyte leveling device includes a leveling device body 1 and a small-hole assembly 5. The leveling device body 1 has a liquid storage chamber 2 inside. The small-hole assembly 5 is disposed above the liquid storage chamber 2 and has a small hole 501 communicating with the liquid storage chamber 2. The inner diameter of the small hole 501 is 0.01 mm.

[0059] For details, please refer to Figure 3 In this embodiment, the small hole component 5 is a capillary structure.

[0060] Specifically, in this embodiment, the length of the capillary-shaped small hole component 5 is 2 mm.

[0061] Specifically, a waterproof and breathable membrane 3 is provided between the orifice assembly 5 and the liquid storage chamber 2. The waterproof and breathable membrane 3 is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane 3 is used to prevent electrolyte from entering the orifice 501.

[0062] Specifically, it also includes a connecting and fixing mechanism 4, which is located above the leak indicator body 1; the small hole assembly 5 is installed on the upper end of the connecting and fixing mechanism 4 with glue, and the waterproof and breathable membrane 3 is installed on the lower end of the connecting and fixing mechanism 4 with glue.

[0063] Specifically, the connecting and fixing mechanism 4 is provided with a through hole; the upper end of the liquid storage chamber 2, the waterproof and breathable membrane 3, the through hole and the small hole 501 form a gas channel.

[0064] Specifically, it also includes the indicator cover 6, which is placed on top of the small hole assembly 5.

[0065] Specifically, it also includes a leak indicator cover 7, which matches the leak indicator cover 6 and is used to seal the liquid storage chamber 2.

[0066] Specifically, in this embodiment, the leakage rate of the electrolyte in the small-aperture lithium-ion battery is 5×10⁻⁶. -6 ~5×10 - 5 mbar*L / s.

[0067] Example 5

[0068] A small-hole type lithium-ion battery electrolyte leveling device includes a leveling device body 1 and a small-hole assembly 5. The leveling device body 1 has a liquid storage chamber 2 inside. The small-hole assembly 5 is disposed above the liquid storage chamber 2 and has a small hole 501 communicating with the liquid storage chamber 2. The inner diameter of the small hole 501 is 1.0 mm.

[0069] Specifically, in this embodiment, the small hole component 5 is a capillary structure.

[0070] Specifically, in this embodiment, the length of the capillary-shaped small hole component 5 is 80 mm.

[0071] Specifically, a waterproof and breathable membrane 3 is provided between the orifice assembly 5 and the liquid storage chamber 2. The waterproof and breathable membrane 3 is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane 3 is used to prevent electrolyte from entering the orifice 501.

[0072] Specifically, it also includes a connecting and fixing mechanism 4, which is located above the leak indicator body 1; the small hole assembly 5 is installed on the upper end of the connecting and fixing mechanism 4 with glue, and the waterproof and breathable membrane 3 is installed on the lower end of the connecting and fixing mechanism 4 with glue.

[0073] Specifically, the connecting and fixing mechanism 4 is provided with a through hole; the upper end of the liquid storage chamber 2, the waterproof and breathable membrane 3, the through hole and the small hole 501 form a gas channel.

[0074] Specifically, it also includes the indicator cover 6, which is placed on top of the small hole assembly 5.

[0075] Specifically, it also includes a leak indicator cover 7, which matches the leak indicator cover 6 and is used to seal the liquid storage chamber 2.

[0076] Specifically, in this embodiment, the leakage rate of the electrolyte in the small-aperture lithium-ion battery is 1×10⁻⁶. -3 ~1×10 - 2 mbar*L / s.

[0077] Example 6

[0078] A small-hole type lithium-ion battery electrolyte leveling device includes a leveling device body 1 and a small-hole assembly 5. The leveling device body 1 has a liquid storage chamber 2 inside. The small-hole assembly 5 is disposed above the liquid storage chamber 2 and has a small hole 501 communicating with the liquid storage chamber 2. The inner diameter of the small hole 501 is 0.1 mm.

[0079] Specifically, in this embodiment, the small hole component 5 is a capillary structure.

[0080] Specifically, in this embodiment, the thickness of the small hole 501 is 12mm.

[0081] Specifically, a waterproof and breathable membrane 3 is provided between the orifice assembly 5 and the liquid storage chamber 2. The waterproof and breathable membrane 3 is a membrane that is impermeable to liquids but permeable to gases. The waterproof and breathable membrane 3 is used to prevent electrolyte from entering the orifice 501.

[0082] Specifically, it also includes a connecting and fixing mechanism 4, which is located above the leak indicator body 1; the small hole assembly 5 is installed on the upper end of the connecting and fixing mechanism 4 with glue, and the waterproof and breathable membrane 3 is installed on the lower end of the connecting and fixing mechanism 4 with glue.

[0083] Specifically, the connecting and fixing mechanism 4 is provided with a through hole; the upper end of the liquid storage chamber 2, the waterproof and breathable membrane 3, the through hole and the small hole 501 form a gas channel.

[0084] Specifically, it also includes the indicator cover 6, which is placed on top of the small hole assembly 5.

[0085] Specifically, it also includes a leak indicator cover 7, which matches the leak indicator cover 6 and is used to seal the liquid storage chamber 2.

[0086] Specifically, in this embodiment, the leakage rate of the electrolyte in the small-aperture lithium-ion battery can be maintained at 1×10⁻⁶. -4 ~1×10 -3 mbar*L / s.

[0087] The working principle of this novel small-hole lithium-ion battery electrolyte leakage indicator is as follows:

[0088] The electrolyte in storage chamber 2 evaporates into gas, existing in a gas-liquid coexistence state within the chamber. A small-aperture lithium-ion battery electrolyte standard leak is placed inside the mass spectrometer chamber, and the chamber is evacuated. Under the pressure difference and the stabilizing effect of the small-aperture assembly, the electrolyte gas in storage chamber 2 evaporates into the mass spectrometer chamber at a stable rate 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 small-aperture lithium-ion battery electrolyte standard leak.

[0089] 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 small-aperture lithium-ion battery electrolyte leak indicator, characterized in that, The device includes a leak gauge body and a small hole assembly. The leak gauge body has a liquid storage chamber. The small hole assembly is located above the liquid storage chamber and has a small hole that communicates with the liquid storage chamber. The inner diameter of the small hole is 0.002mm-1mm.

2. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 1, characterized in that, The small hole assembly is a small hole sheet structure, and the inner diameter of the small hole is 0.002mm-0.6mm.

3. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 2, characterized in that, The thickness of the small hole is 0.01mm-5mm.

4. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 1, characterized in that, The small hole assembly has a capillary structure, and the inner diameter of the small hole is 0.01mm-1.0mm.

5. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 4, characterized in that, The length of the small hole is 1-500 times the inner diameter of the small hole.

6. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 1, characterized in that, A waterproof and breathable membrane is provided between the small hole assembly and the liquid storage chamber.

7. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 6, characterized in that, It also includes a connecting and fixing mechanism, which is disposed on the leak indicator body and located above the liquid storage chamber; the connecting and fixing mechanism is located between the orifice assembly and the waterproof and breathable membrane, and is used to connect and fix the orifice assembly and the waterproof and breathable membrane.

8. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 7, characterized in that, The connecting and fixing mechanism is provided with a through hole.

9. The small-aperture lithium-ion battery electrolyte leak indicator as described in any one of claims 1-8, characterized in that, It also includes a puncture cover, which is positioned above the orifice assembly.

10. The small-aperture lithium-ion battery electrolyte leak indicator as described in claim 9, characterized in that, It also includes a leak gauge cap, which matches the leak gauge cover and is used to seal the liquid storage chamber.

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