Novel lithium battery liquid leakage detection structure

Abstract

The application discloses a novel lithium battery liquid leakage detection structure, which comprises a product cavity, an ion trap instrument and a control system, wherein the ion trap instrument is connected with the control system, the product cavity is used for placing a lithium ion battery to be detected, the product cavity and the ion trap instrument are connected through a communication cavity, a vacuum extraction pipeline is connected to the communication cavity, and a vacuum pump connected with the control system is arranged on the vacuum extraction pipeline. The ion trap instrument can perform full-spectrum scanning, form a spectrum diagram of all detected gases, comprehensively detect signals of multiple substances, and has the characteristics of high detection sensitivity, anti-interference, high detection efficiency and the like.

Description

Technical Field

[0001] This invention relates to the field of lithium battery leakage detection, and in particular to a novel lithium battery leakage detection structure. Background Technology

[0002] Current lithium-ion battery leakage detection technologies, such as quadrupole mass spectrometry, first generate ions using an ion source, which then enter a quadrupole analyzer. Ions with specific mass-to-charge ratios are selected by adjusting the voltage, and finally detected by a detector. However, in practical lithium battery applications, to meet production efficiency requirements, only a single substance can be detected, potentially resulting in a weak signal.

[0003] The core principle of VOC (volatile organic compound) mass spectrometry detection technology is to utilize the physicochemical properties of VOCs (such as volatility, polarity, ionization ability, etc.) to achieve qualitative or quantitative analysis of target compounds through separation, enrichment, and signal conversion. However, VOC detection technology cannot distinguish the specific material components of the gas being measured.

[0004] Among the aforementioned testing technologies, the quadrupole testing technology suffers from drawbacks such as high manufacturing difficulty and precision requirements, significant reliance on imports, poor availability, and complex, costly, and maintenance-intensive operation.

[0005] VOC detection technology is often affected by glue or impurities in the air during lithium battery leakage detection, which interferes with the test results and leads to a high rate of on-site misjudgment. Summary of the Invention

[0006] The main objective of this invention is to provide a novel lithium battery leakage detection structure, aiming to provide a more accurate and faster method for detecting lithium battery leakage.

[0007] To achieve the above objectives, the present invention proposes a novel lithium battery leakage detection structure comprising a product cavity, an ion trap instrument, and a control system. The ion trap instrument and the control system are connected. The product cavity is used to place the lithium-ion battery to be tested. The product cavity and the ion trap instrument are connected through a connecting cavity. A vacuum pipe is connected to the connecting cavity, and a vacuum pump connected to the control system is provided on the vacuum pipe.

[0008] In one embodiment, a vacuum breaking valve is provided on the product cavity, and the vacuum breaking valve is connected to the control system.

[0009] In one embodiment, a vacuum valve is provided on the vacuum pipe, and the vacuum valve is connected to the control system.

[0010] In one embodiment, a test valve is provided at one end of the communicating cavity near the ion trap instrument, and the test valve is connected to the control system.

[0011] In one embodiment, a carrier gas valve is provided on the product cavity, and the carrier gas valve is connected to the control system.

[0012] In one embodiment, the novel lithium battery leakage detection structure further includes a vacuum gauge and a pressure gauge, the vacuum gauge and the pressure gauge being installed on the product cavity and / or the communicating cavity.

[0013] In one embodiment, a flow-limiting valve is provided at the end of the communicating cavity near the ion trap instrument, and the flow-limiting valve is connected to the control system.

[0014] In the technical solution of this invention, the novel lithium battery leakage detection structure includes a product cavity, an ion trap instrument, and a control system. The ion trap instrument and the control system are connected. The product cavity is used to place the lithium-ion battery to be tested. The product cavity and the ion trap instrument are connected through a connecting cavity, which is connected to a vacuum pipe. The vacuum pipe is equipped with a vacuum pump connected to the control system. Therefore, in this technical solution, the ion trap instrument can perform a full-spectrum scan to form the spectrum of all the gases being tested, comprehensively detecting signals from multiple substances. This results in better detection of minute leaks and features high detection sensitivity, anti-interference, and high detection efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the novel lithium battery leakage detection structure according to an embodiment of the present invention.

[0017] Explanation of reference numerals: 10, Product cavity; 20, Ion trap instrument; 30, Connecting cavity; 40, Vacuum extraction pipeline; 50, Vacuum pump; 60, Vacuum breaking valve; 70, Vacuum extraction valve; 80, Test valve; 90, Flow limiting valve; 100, Carrier gas valve; 110, Vacuum gauge; 120, Pressure gauge.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0023] This invention provides a novel lithium battery leakage detection structure.

[0024] like Figure 1 As shown, the novel lithium battery leakage detection structure provided in this embodiment of the invention includes a product cavity 10, an ion trap instrument 20, and a control system. The ion trap instrument 20 is connected to the control system. The product cavity 10 is used to place the lithium-ion battery to be tested. The product cavity 10 and the ion trap instrument 20 are connected through a connecting cavity 30. A vacuum pipe 40 is connected to the connecting cavity 30, and a vacuum pump 50 connected to the control system is provided on the vacuum pipe 40.

[0025] In this embodiment, the ion trap instrument 20 can perform a full-spectrum scan to form the spectrum of all the gases being tested, comprehensively detect the signals of multiple substances, and achieve better detection of minute leaks. It features high detection sensitivity, anti-interference, and high detection efficiency.

[0026] Meanwhile, ion trap instruments are simple to use, easier to operate, and easier to manufacture. They do not rely on imports, have lower costs, and are more readily available.

[0027] Furthermore, the ion trap instrument 20 can analyze all the gases to be tested, accurately identify the electrolyte signal, shield the interference of ambient gases, and more accurately identify whether there is an electrolyte leak.

[0028] Optionally, the ion trap mass spectrometer can be an ion trap instrument 20. Accordingly, the working principle of the ion trap instrument 20 is briefly described below:

[0029] 1. Ionization: Sample molecules are ionized into ions by the electron beam generated by the heating filament. These ions are then ionized into charged ions under the influence of electrons.

[0030] 2. Capture: Ions are introduced into an ion trap consisting of two hyperboloidal end cap electrodes and a hyperboloidal annular intermediate electrode. By applying a cyclotron acceleration voltage (RF), the ions are captured in the trap.

[0031] 3. Mass Analysis: By changing the electric field, ions are separated according to their mass-to-charge ratio (m / z). As the amplitude of the RF voltage changes, ions with different mass-to-charge ratios are sequentially ejected from the trap for detection.

[0032] 4. Detection: The emitted ions pass through a small hole located in the center of the lower end cap electrode and reach the electron multiplier for detection.

[0033] The specific detection principle is existing technology and will not be elaborated here. The focus of this application is the connection method of the novel lithium battery leakage detection structure.

[0034] In the above embodiment, the product cavity 10 is provided with a vacuum breaking valve 60 and a carrier gas valve 100, and the vacuum breaking valve 60 and the carrier gas valve 100 are connected to the control system. The vacuuming pipe 40 is provided with a vacuuming valve 70 connected to the control system.

[0035] The connecting cavity 30 is provided with a test valve 80 and a flow limiting valve 90 at one end near the ion trap instrument 20, and the test valve 80 and the flow limiting valve 90 are connected to the control system.

[0036] In this application, the control system is capable of controlling the opening or closing of various valves to achieve the steps of evacuating or breaking the vacuum in the system.

[0037] To ensure that the ion trap instrument 20 is tested under optimal sample injection conditions, a flow limiting valve 90 is installed at the front end of the ion trap instrument 20. Its function is to regulate the amount of gas entering the ion trap instrument 20 and ensure that the ion trap instrument 20 is within the optimal sample injection range. The flow limiting valve 90 is designed to be both manually adjustable and automatically adjustable. Manual adjustment relies on manually adjusting the valve opening to adjust the flow limiting size, while automatic adjustment reads the front-end pressure data, automatically calculates the valve opening, and adjusts the valve opening to an appropriate position.

[0038] Specifically, pressure data can be obtained through a vacuum gauge 110 and a pressure gauge 120 located on the product cavity 10 and / or the connecting cavity 30.

[0039] The testing process for this application is as follows:

[0040] 1. Placing the sample: First, open the product cavity 10, then put the sample to be tested / lithium-ion battery into the product cavity 10, then close the product cavity 10 and ensure that the product cavity 10 is well sealed.

[0041] 2. Vacuuming: The control system opens the vacuum valve 70, closes the vacuum breaking valve 60 and the test valve 80, until the set vacuum level is reached. After the set vacuum level is reached, the vacuum valve 70 is closed.

[0042] 3. Testing: The control system opens the test valve 80, and the ion trap instrument 20 automatically begins testing. During testing, the opening of the carrier gas valve 100 is determined based on the gas injection status.

[0043] 4. Vacuum breaking: After the test is completed, the control system opens the vacuum breaking valve 60. After the system returns to normal pressure, the product cavity 10 can be opened to remove the sample / lithium-ion battery to be tested, and the test is over.

[0044] This application relates to a leakage detection structure for lithium batteries, which has simple usage conditions, is easy to operate, and has high detection efficiency.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A novel lithium battery leakage detection structure, characterized in that, The novel lithium battery leakage detection structure includes a product cavity (10), an ion trap instrument (20), and a control system. The ion trap instrument (20) and the control system are connected. The product cavity (10) is used to place the lithium-ion battery to be tested. The product cavity (10) and the ion trap instrument (20) are connected through a connecting cavity (30). A vacuum pipe (40) is connected to the connecting cavity (30), and a vacuum pump (50) connected to the control system is provided on the vacuum pipe (40).

2. The novel lithium battery leakage detection structure according to claim 1, characterized in that, A vacuum breaking valve (60) is provided on the product cavity (10), and the vacuum breaking valve (60) is connected to the control system.

3. The novel lithium battery leakage detection structure according to claim 1, characterized in that, A vacuum valve (70) is provided on the vacuum pipe (40), and the vacuum valve (70) is connected to the control system.

4. The novel lithium battery leakage detection structure according to claim 1, characterized in that, A test valve (80) is provided at one end of the connecting cavity (30) near the ion trap instrument (20), and the test valve (80) is connected to the control system.

5. The novel lithium battery leakage detection structure according to claim 1, characterized in that, The product cavity (10) is provided with a carrier gas valve (100), and the carrier gas valve (100) is connected to the control system.

6. The novel lithium battery leakage detection structure according to claim 1, characterized in that, The novel lithium battery leakage detection structure also includes a vacuum gauge (110) and a pressure gauge (120), which are mounted on the product cavity (10) and / or the communicating cavity (30).

7. The novel lithium battery leakage detection structure according to claim 1, characterized in that, The connecting cavity (30) is provided with a flow limiting valve (90) at one end near the ion trap instrument (20), and the flow limiting valve (90) is connected to the control system.

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