Gas production testing device

Abstract

The utility model discloses a gas production testing device which comprises a communicating pipe, a driving piece, a split piece, a gas pressure detection piece, a valve, a first collector and a weight detection piece, an inlet of the communicating pipe directly faces the driving part, the driving part is configured to drive the end to move close to or away from the inlet of the communicating pipe, the communicating pipe is sequentially provided with a split part, an air pressure detection part, a valve and a first collector in the flowing direction, and a weight detection part is arranged at the bottom of the first collector. The device has the beneficial effects that the communicating pipe is arranged to export the gas produced by the battery, the gas pressure detection piece is matched to detect the gas production speed, the weight detection piece is matched to detect the gas production weight, and the first collector is used for collecting the produced gas, so that the complete data of the gas produced in the formation process is finally collected, and the gas produced in the formation process is analyzed.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery manufacturing technology, and in particular to a gas generation testing device. Background Technology

[0002] With the popularization of mobile electrical devices and new energy vehicles, lithium-ion batteries have become an ideal energy carrier due to their high operating voltage, small size, light weight, high energy, no memory effect, no pollution, low self-discharge and long cycle life, showing great application potential and market prospects in the fields of energy storage and power applications.

[0003] In the field of lithium-ion battery manufacturing, after the lithium battery is manufactured and encapsulated, it needs to undergo electrolyte injection and then formation. The purpose of formation is to activate the positive and negative electrode active materials inside the battery to form a stable SEI film, which is the initialization of the battery and completes an energy conversion process.

[0004] The formation process is a crucial step in lithium battery manufacturing, directly affecting the performance of the final battery. Traditional formation methods cannot confirm or measure the gas generation during formation, thus affecting the assessment of the film formation effect. This may result in the inability to completely eliminate defects in the formation process, and the failure to identify deficiencies in the formation process, causing long-term damage to the subsequent electrical performance of the lithium battery.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The technical problem to be solved by this utility model is: to solve the problem of the inability to confirm and measure the gas production from chemical formation.

[0007] This utility model solves the above-mentioned technical problems through the following technical means:

[0008] This utility model claims protection for a gas generation testing device, including a connecting pipe, a driving component, a split component, a pressure detection component, a valve, a first collector, and a weight detection component; the inlet of the connecting pipe is directly opposite the driving component, the driving component is configured to move towards or away from the inlet of the connecting pipe, the split component, the pressure detection component, the valve, and the first collector are arranged sequentially along the flow direction of the connecting pipe, and the weight detection component is arranged at the bottom of the first collector.

[0009] This utility model claims to protect the complete data of gas generated during the formation process by setting a connecting pipe to discharge the gas generated by the battery, using a gas pressure detector to detect the gas generation rate and a weight detector to detect the gas generation weight, and collecting the gas generated by a first collector.

[0010] Preferably, the gas generation testing device further includes a fixing plate and a sealing element. The fixing plate is equipped with the sealing element, and one end of the connecting pipe is connected to the sealing element to form the inlet of the connecting pipe. The sealing element faces the driving end.

[0011] The seal is mainly used to seal the battery and the connecting pipe.

[0012] Preferably, the gas generation testing device also includes an external power supply, with the external power supply mounted on the fixing plate and the charging end of the external power supply facing the driving end.

[0013] An external power supply is used to charge and discharge the battery to achieve gas generation testing during the battery formation stage. It is worth noting that in actual work, it is not necessary to charge the battery with an external power supply to achieve gas generation testing; this is just one of the technical means of battery operation.

[0014] Preferably, the drive end is provided with a mounting part, which is directly opposite the seal.

[0015] The battery is secured by a mounting section.

[0016] Preferably, the mounting part has a U-shaped structure, with the U-shaped opening facing the seal.

[0017] The inner contour of the U-shaped opening matches the outer contour of the battery, allowing the battery to be fixed directly by snapping it into the U-shaped opening. This method is quick and highly stable.

[0018] Preferably, the sealing element is a rubber stopper.

[0019] The rubber stopper not only adapts well to the connection between the connecting tube and the battery filling port, making the connection easy, but also fills the gaps after connection, thus sealing the connection between the connecting tube and the battery filling port.

[0020] Preferably, the separate component includes a liquid distribution pipe, a separator, and a second collector, with the liquid outlet of the separator connected to the second collector via the liquid distribution pipe.

[0021] The gas-liquid separator is mainly used to separate gas and liquid in a connecting pipe. The liquid flows through the separator pipe into the second collector for storage. The gas continues to flow through the connecting pipe past the pressure detection element.

[0022] Preferably, the valve is a one-way valve.

[0023] The one-way valve can prevent gas backflow, and gas can only enter the gas collector through valve 17, but cannot flow out in reverse.

[0024] Preferably, the air pressure detection component is a pressure sensor.

[0025] Pressure sensors are mainly used to sense airflow pressure and convert the speed of air pressure generation into the speed of air production.

[0026] Preferably, the weight detection device is an electronic scale.

[0027] Electronic scales are lightweight, convenient, and highly accurate, making them ideal for measuring gases in gas collectors. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the gas generation testing device of this utility model.

[0029] 10. Fixing plate; 11. External power supply; 12. Seal; 13. Connecting pipe; 14. Driving component; 140. Mounting part; 150. Separating pipe; 151. Separator; 152. Second collector; 16. Pressure detection component; 17. Valve; 18. First collector; 19. Weight detection component. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] See Figure 1 This utility model claims protection for a gas generation testing device, including an external power supply 11, a fixing plate 10, a sealing element 12, a connecting pipe 13, a driving element 14, a split component, a gas pressure detection element 16, a valve 17, a first collector 18, and a weight detection element 19.

[0032] The fixing plate 10 is flat, and an external power supply 11 is installed on the fixing plate 10 with the charging end of the external power supply 11 facing downwards. The charging end of the external power supply 11 refers to the metal probe of the external power supply 11. In use, the battery can be charged by contacting the metal probe of the external power supply 11 with the positive and negative terminals of the battery.

[0033] The fixing plate 10 is also provided with a sealing element 12. One end of the connecting pipe 13 is connected to the sealing element 12. The sealing element 12 is facing the driving end. The sealing element 12 is preferably a rubber plug. The main purpose of the rubber plug is to seal the battery filling port and realize the sealed connection between the connecting pipe 13 and the inside of the battery.

[0034] A drive member 14 is disposed directly below the fixed plate 10. The drive member 14 is configured to move towards or away from the inlet of the through pipe. The drive member 14 is preferably a lifting mechanism, with the lifting column of the lifting mechanism constituting the drive end. In actual operation, the drive member 14 includes, but is not limited to, a lifting mechanism, and can also be a cylinder, a ball screw structure, or an electric push rod mechanism, mainly to drive the battery to move up and down.

[0035] The drive end is provided with a mounting part 140, which faces the seal 12. The mounting part 140 has a U-shaped structure, with the U-shaped opening facing the seal 12. In actual use, the inner contour of the U-shaped opening is consistent with the outer contour of the battery, and the battery can be directly fixed by snapping it into the U-shaped opening. Of course, the battery is not limited to this method of fixing; a locking block or pin can also be used to install the battery on the drive end. During installation, it should be noted that the rubber stopper and the battery filling port are on the same vertical line, and the metal probe of the external power supply 11 is on the same vertical line as the positive and negative terminals of the battery.

[0036] A split component is provided on the connecting pipe 13, specifically, the split component includes a liquid separator 150, a separator 151, and a second collector 152. The outlet of the separator 151 in the connecting pipe 13 is connected to the second collector 152 through the liquid separator 150. The separator 151 is preferably a gas-liquid separator 151, mainly used to separate gas and liquid in the connecting pipe 13. The liquid flows through the liquid separator 150 and enters the second collector 152 for storage. The gas continues to flow through the gas pressure detection element 16 along the connecting pipe 13.

[0037] The pressure detection element 16 is preferably a pressure sensor. The pressure sensor is mainly used to sense the airflow pressure and convert the speed of air pressure generation into the speed of air production. In actual use, an external instrument panel can also be set on the pressure sensor to visualize the relationship curve between the air production speed and time through the readings on the external instrument panel.

[0038] Along the flow direction, a valve 17 and a first collector 18 are sequentially installed on the connecting pipe 13 behind the pressure detection element 16. The valve 17 is preferably a one-way valve, which can prevent gas backflow; gas can only enter the gas collector through the valve 17 and cannot flow out in the opposite direction. The first collector 18 is preferably a gas collector, whose main function is to collect the generated gas and provide a sealed storage space for the generated gas.

[0039] A weight detection element 19 is installed at the bottom of the first collector 18. The weight detection element 19 is preferably an electronic scale, which is preferably equipped with a display panel. The total weight of the gas in the gas collector can be visualized by the reading on the display panel. It is worth noting that the electronic scale needs to be calibrated to zero before weighing.

[0040] This gas generation testing device is used to monitor the gas generation process during battery formation as follows:

[0041] First, install the battery on the mounting part 140. Specifically, the battery is inserted into the U-shaped opening, ensuring that the rubber stopper and the battery filling port are on a vertical line, and that the metal probe of the external power supply 11 is on a vertical line with the positive and negative terminals of the battery.

[0042] Next, the drive unit 14 is activated, causing the drive end to move the battery upward until the metal probe of the external power supply 11 contacts the positive and negative terminals of the battery, the rubber stopper seals the battery filling port, and the battery filling port is connected to the connecting tube 13.

[0043] Then, the weight detection piece 19 was calibrated to zero.

[0044] Finally, the external power supply 11 begins charging the battery. As time progresses, a chemical reaction gradually begins inside the battery, and gas is gradually generated. When the pressure sensor detects the gas pressure, it displays the gas production rate. At the same time, valve 17 is opened, and the gas enters the collector for storage. The electronic scale displays the total weight of the gas in the collector.

[0045] After the formation process is completed, complete data on gas production during the formation process are collected to solve the problem of unconfirmed and unmeasurable gas production during formation.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gas production testing device, characterized by, It includes a connecting pipe (13), a driving component (14), a split component, a pressure detection component (16), a valve (17), a first collector (18), and a weight detection component (19); the inlet of the connecting pipe (13) is directly opposite the driving component (14), the driving component (14) is configured to move towards or away from the inlet of the connecting pipe, the split component, the pressure detection component (16), the valve (17) and the first collector (18) are arranged sequentially along the flow direction of the connecting pipe (13), and the weight detection component (19) is arranged at the bottom of the first collector (18).

2. The gas generation testing device of claim 1, wherein, It also includes a fixing plate (10) and a sealing element (12). The fixing plate (10) is equipped with the sealing element (12). One end of the connecting pipe (13) is connected to the sealing element (12) to form the inlet of the connecting pipe (13). The sealing element (12) is directly opposite the driving end.

3. The gas generation testing device of claim 2, wherein, It also includes an external power supply (11), and the fixing plate (10) is equipped with the external power supply (11), with the charging end of the external power supply (11) facing the driving end.

4. The gas generation testing device of claim 2, wherein, The drive end is provided with a mounting part (140), which is directly opposite the seal (12).

5. The gas generation testing device of claim 4, wherein, The mounting part (140) has a U-shaped structure, with the U-shaped opening facing the seal (12).

6. The gas generation testing device of claim 5, wherein, The seal (12) is a rubber stopper.

7. The gas generation testing device of claim 1, wherein, The separate components include a liquid distribution pipe (150), a separator (151), and a second collector (152). A connecting pipe (13) is provided to connect the outlet of the separator (151) to the second collector (152) through the liquid distribution pipe (150).

8. The gas generation testing device of claim 1, wherein, Valve (17) is a one-way valve.

9. The gas generation testing device of claim 1, wherein, The air pressure detection component (16) is a pressure sensor.

10. The gas generating testing device of claim 1, wherein, The weight detection component (19) is an electronic scale.

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