A device for collecting gas generated during formation of an aluminum shell battery

Abstract

The application discloses an aluminum shell battery formation gas production collecting device, and aims to solve the problem of the existing technology that the drainage method collects gas to be dissolved in a part of the gas, thereby affecting the accuracy of experimental results. The application solves the above technical problems through the following technical scheme. A formation cabinet is provided with a support plate for supporting an aluminum shell battery at the bottom of the formation cabinet. A test plate is provided with a positive probe and a negative probe. A gas guide pipe is connected with the aluminum shell battery at one end and connected with a gas bag at the other end. A flow monitoring meter is arranged on the gas guide pipe. The application adopts the flow monitoring meter to detect the gas production, so that the flow monitoring meter can record and display the amount of gas in real time, and the accuracy of experimental results is improved. Meanwhile, the application can collect the gas produced by battery formation, so that the gas can be collected in the gas bag, and the storage and next-step analysis of the gas are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, more particularly, it relates to a kind of aluminum shell battery formation gas collection device. BACKGROUND

[0002] A large amount of gas will be generated when square aluminum shell battery is formed, and it is particularly important to collect the gas in a timely and quantitative manner for analysis of the battery. Currently, the drainage method is commonly used to collect the gas generated during formation, a conduit is sealedly connected with the liquid injection port of the battery, the other end of the conduit is placed in a graduated cylinder in a water tank, the remaining water in the graduated cylinder is collected in real time, and then the formation gas production is calculated.

[0003] Chinese patent No. CN112415396A, published on February 26, 2021, entitled "a method for detecting the gas evolution of a lead-acid battery negative electrode", discloses a method for detecting the gas evolution of a lead-acid battery negative electrode, and discloses the following technical features, including: after the positive active material of the lead-acid battery is formed and charged to more than 99% of the capacity of the lead-acid battery, the lead-acid battery is charged at a constant temperature, the gas evolved from the lead-acid battery is collected, and the volume of the evolved gas is measured by the drainage method. This application uses the drainage method to collect gas, but the drainage method is suitable for collecting gases that are not soluble in water, such as the gas generated during the formation of the battery, which contains a certain amount of CO2, which is slightly soluble in water, affecting the accuracy of the experimental results. Moreover, when collecting the formation gas by the drainage method, the water level in the graduated cylinder needs to be recorded by a person in a timely manner, so as to calculate the real-time gas production, which is not conducive to saving labor costs, and human operation may also cause errors. SUMMARY

[0004] The present application overcomes the deficiency of the prior art that the drainage method collects gas and dissolves part of the gas, affecting the accuracy of the experimental results, and provides a kind of aluminum shell battery formation gas collection device, which can overcome the deficiency that part of the gas is dissolved when the drainage method is used to collect gas, so that the experimental results are more accurate.

[0005] To solve the above technical problems, the present application adopts the following technical scheme: a kind of aluminum shell battery formation gas collection device, comprising:

[0006] The bottom of the formation cabinet is provided with a support plate for supporting the aluminum shell battery;

[0007] The test plate is provided with a positive probe and a negative probe;

[0008] The gas guide pipe is connected with the aluminum shell battery at one end, and the other end of the gas guide pipe is connected with the gas bag;

[0009] The flow monitor is arranged on the gas guide pipe.

[0010] The present application adopts the flow detector to detect the gas production, and the gas passes through the gas guide pipe and enters the flow detector, so that the flow detector can record and display the gas amount in real time, and the accuracy of the experimental result is improved; meanwhile, the gas generated by the battery formation can be collected, so that the gas can be collected in the gas bag, and the storage and the next analysis of the gas are facilitated.

[0011] As preferred, the upper end surface of the test electrode plate is connected with a spring, and the end of the spring away from the test electrode plate is connected with the pressing plate.

[0012] By arranging the spring, the positive probe and the negative probe can be tightly connected with the positive electrode and the negative electrode of the battery through the action of the spring.

[0013] As preferred, the device further comprises a gas expelling device, and the gas guide pipe is arranged in the gas expelling device.

[0014] During the experiment, it is found that a part of gas is stored in the gas guide pipe, so that the gas in the gas guide pipe also needs to be collected to improve the accuracy of the experimental result.

[0015] As preferred, the gas expelling device comprises:

[0016] a bottom plate, the bottom plate is provided with a limiting groove along the length direction of the bottom plate, and the gas guide pipe is arranged in the limiting groove;

[0017] a side plate arranged on the two sides of the bottom plate, and the side plate is provided with a guide groove;

[0018] a gas expelling roller arranged in the guide groove;

[0019] a power device for driving the gas expelling roller to move along the length direction of the bottom plate.

[0020] The gas expelling roller is driven by the power device to move in the guide groove, so that the gas expelling roller is pressed on the gas guide pipe during the movement, and the gas in the gas guide pipe can be detected by the flow detector, the accuracy of the experimental result is improved, and the gas bag can collect the gas remaining in the gas guide pipe.

[0021] As preferred, the guide groove comprises a horizontal guide groove, an inclined guide groove, a return guide groove and a reset guide groove, one end of the horizontal guide groove is communicated with the inclined guide groove, the other end of the horizontal guide groove is communicated with the return guide groove, one end of the return guide groove away from the inclined guide groove is connected with the reset guide groove, and one end of the reset guide groove away from the return guide groove is connected with the horizontal guide groove.

[0022] The slider is connected with the power device; a sliding hole is arranged in the slider; a sliding rod is arranged in the sliding hole; one end of the sliding rod slides in the sliding hole; the other end of the sliding rod is connected with the air squeezing roller; and the bottom of the sliding hole is connected with the sliding rod through the tightening spring.

[0023] In order to collect as much gas in the air guide pipe as possible through the air bag, the guide groove is arranged as a horizontal guide groove, an inclined guide groove, a return guide groove and a reset guide groove; the air squeezing roller is driven to move by the power device, so that the air squeezing roller can move along the horizontal guide groove, the inclined guide groove, the return guide groove and the reset guide groove; and the air squeezing roller can be tightly pressed against the air guide pipe by the tension of the tightening spring, so that the gas in the air guide pipe is squeezed into the flow detector.

[0024] Preferably, the inclined guide groove is provided with a one-way guide device at the connection with the return guide groove; the one-way guide device comprises a rotating shaft, a one-way guide plate and an abutting block; the rotating shaft is fixedly arranged on one side of the inclined guide groove; the abutting block is fixedly arranged on the other side of the inclined guide groove; one end of the one-way guide plate is rotatably connected with the rotating shaft; and the other end of the one-way guide plate is arranged on the abutting block.

[0025] In order to enable the air squeezing roller to smoothly move along the guide groove, the one-way guide device is arranged at the connection between the inclined guide groove and the return guide groove; when the air squeezing roller moves from the inclined guide groove to the return guide groove, the air squeezing roller can lift the one-way guide plate, so that the air squeezing roller can reach the return guide groove; after the air squeezing roller reaches the return guide groove, the one-way guide plate is arranged on the abutting block again by its own gravity, so that the inclined guide groove is closed, preventing the air squeezing roller from returning to the inclined guide groove; thereby enabling the air squeezing roller to move along the guide groove in one direction.

[0026] Preferably, the side edge of the side plate is provided with a sliding groove; a sliding block is arranged in the sliding groove; and a linear bearing is arranged in the sliding groove.

[0027] The sliding block cooperates with the sliding groove, and the linear bearing is arranged in the sliding groove, so as to reduce the friction when the sliding block slides in the sliding groove, and enable the sliding block to slide in the sliding groove more smoothly.

[0028] Preferably, the air squeezing roller comprises a rotating roller; fixed rollers are arranged at both ends of the rotating roller; and the rotating roller is rotatably connected with the fixed rollers.

[0029] The air squeezing roller is arranged as a rotating roller and fixed rollers, so that the rotating roller and the fixed rollers can rotate relative to each other; when the air squeezing roller squeezes the air guide pipe, the movement between the air squeezing roller and the air guide pipe is rolling friction, which reduces the friction between them and the wear of the air guide roller, and improves the service life of the air guide pipe.

[0030] As preferred, the limiting groove comprises a limiting plate, the bottom plate is provided with a mounting slot hole, both sides of the mounting slot hole in the width direction are provided with a through slot, and the limiting plate is arranged in the through slot.

[0031] The limiting groove can limit the air guide pipe, preventing the air guide pipe from being offset when the air guide pipe is pressed by the air squeezing roller.

[0032] As preferred, the limiting plate comprises a plurality of limiting units; the limiting unit comprises:

[0033] An abutting plate is connected to the bottom of the limiting plate;

[0034] An abutting spring is abutted between the limiting plate and the bottom wall of the mounting slot hole.

[0035] The limiting plate is arranged as a plurality of limiting units due to the limiting groove, so that the air guide pipe cannot be well squeezed by the air squeezing roller, and the gas in the air guide pipe cannot be well discharged, and thus the limiting plate is arranged as a plurality of limiting units; when the air squeezing roller is pressed on the air guide pipe, the limiting unit corresponding to the local air guide pipe is moved downward against the abutting force of the abutting spring, so that the air squeezing roller fully squeezes the gas in the air guide pipe out.

[0036] Compared with the prior art, the present application has the following advantages: (1) the flow detector is used to monitor the gas production, improving the accuracy of experimental results; (2) the generated gas can be collected, facilitating the next step of analysis; (3) the air squeezing device is arranged to discharge the gas in the air guide pipe, further improving the accuracy of experimental results. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic diagram of the present application;

[0038] Figure 2 is a structural schematic diagram of another angle of the present application;

[0039] Figure 3 is a front view of the air squeezing device in the second embodiment of the present application and a local enlarged view thereof;

[0040] Figure 4 is a sectional view in the A direction of Figure Three and a local enlarged view thereof;

[0041] Figure 5 is a top view of the air squeezing device in the second embodiment of the present application and a local enlarged view thereof;

[0042] In the figure: 1, formation cabinet, 2, test plate, 21, positive probe, 22, negative probe, 23, spring, 24, pressing plate, 25, spring, 26, aluminum shell battery, 3, gas guide pipe, 4, air bag, 5, flow monitor, 6, air squeezing device, 61, bottom plate, 611, mounting slot hole, 62, side plate, 631, horizontal guide slot, 632, inclined guide slot, 633, return guide slot, 634, reset guide slot, 635, limiting groove, 64, power device, 65, sliding block, 651, sliding hole, 652, sliding rod, 653, tightening spring, 66, sliding groove, 67, air squeezing roller, 671, rotating roller, 672, fixed roller, 7, one-way conduction device, 71, rotating shaft, 72, one-way conduction plate, 73, abutting block, 8, limiting plate, 81, abutting plate, 82, abutting spring; 9, connecting rod. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be further described below with specific examples and in conjunction with the drawings:

[0044] Example 1: Referring to Figures 1 to 2 As shown in the figure, an aluminum shell battery formation gas collection device comprises:

[0045] The formation cabinet 1 is provided with a support plate (not shown in the figure) at the bottom to support the aluminum shell battery 26;

[0046] The test plate 2 is provided with a positive probe 21 and a negative probe 22 on the test plate 2; the upper end surface of the test plate 2 is connected with a spring 23, and the end of the spring 23 away from the test plate 2 is connected with a pressing plate 24; the pressing plate 24 is connected with a gas cylinder 25 through a connecting rod;

[0047] The gas guide pipe 3 is connected with the aluminum shell battery at one end, and connected with the air bag 4 at the other end; a one-way valve (not shown in the figure) is arranged at the connection between the air bag 4 and the gas guide pipe 3;

[0048] The flow monitor 5 is arranged on the gas guide pipe 3;

[0049] The flow monitor 5, the formation cabinet 1 and the gas cylinder 25 are connected with a computer, and automatic control is realized through the computer.

[0050] The working principle of this embodiment is as follows: The aluminum-cased battery 26 to be tested is placed on a support plate. One end of the gas guide tube 3 is connected to the inside of the aluminum-cased battery 26. The connection between the gas guide tube 3 and the aluminum-cased battery 26 is sealed with tape to prevent gas leakage at the connection point. The other end of the gas guide tube 3 is connected to the gas collection bag 4. The formation cabinet 1 is automatically controlled by a computer. The cylinder drives the pressure plate 24 to move, so that the positive electrode probe 21 and the negative electrode probe 22 on the test plate 2 below the pressure plate 24 contact the positive and negative electrodes of the aluminum-cased battery 26, respectively. The spring 23 can keep the positive electrode probe 21 and the negative electrode probe 22 in tight contact with the positive and negative electrodes of the aluminum-cased battery 26. Then, the aluminum-cased battery 26 is powered on to start the formation test. During the formation process, the flow meter 5 detects and records the gas volume and transmits the recorded data to the computer. At the same time, the gas bag 4 collects the gas generated during the formation. The collected gas is convenient for storage and further analysis.

[0051] Example 2: Refer to Figures 3 to 5 As shown, this embodiment is similar in structure to embodiment 1, except that the air guide pipe 3 is installed inside the air extrusion device 6, which includes a bottom plate 61, a side plate 62, an air extrusion roller 67, and a power device 64.

[0052] The base plate 61 is provided with a limiting groove along its length, and the air guide pipe 3 is disposed in the limiting groove. The limiting groove includes a limiting plate 8. The base plate 61 is provided with an installation slot 611. The two sides of the installation slot 611 are provided with through slots 612 in the width direction. The limiting plate 8 is disposed in the through slots 612. The limiting plate 8 is composed of several limiting units arranged linearly. The limiting unit includes an abutment plate 81 and an abutment spring 82. The bottom ends of the limiting plates 8 in the through slots 612 on both sides are connected by the abutment plate 81. The abutment spring 82 abuts against the bottom wall of the mounting slot 611.

[0053] Side plates 62 are provided on both sides of the base plate 61; guide grooves are provided on the side plates 62;

[0054] The air-extrusion roller 67 is mounted in the guide grooves of the two side plates 62; the air-extrusion roller 97 includes: a rotating roller 671, with fixed rollers 672 at both ends of the rotating roller 671, and the rotating roller 671 and the fixed rollers 672 are rotatably connected; the fixed rollers 672 are mounted in the guide grooves.

[0055] Power unit 64; In this embodiment, the power unit 64 is a power cylinder, and the movable end of the power cylinder drives the air extrusion roller 63 to move along the length direction of the base plate 61.

[0056] The working principle of the embodiment is as follows: it is found in the experiment that a part of gas is still stored in the inner part of the gas guide pipe 3, and therefore, in order to further improve the accuracy of the experimental results, the gas in the inner part of the gas guide pipe 3 also needs to be collected to improve the accuracy of the experimental results. After the formation of the aluminum shell battery 26 is completed, the gas extrusion roller 67 is driven by the power device 64 to move in the guide groove, so that the gas extrusion roller 67 is pressed on the gas guide pipe 3 when moving, so that the gas in the inner part of the gas guide pipe 3 can be detected by the flow detection meter 5, improving the accuracy of the experimental results, and at the same time, the gas bag 4 can collect the gas remaining in the gas guide pipe 3. It should be noted that the gas guide pipe 3 in the embodiment is made of flexible material, so that the gas guide pipe 3 can deform when subjected to the force of the extrusion roller 67, for example, the gas guide pipe 3 is a plastic hose.

[0057] The gas extrusion roller 67 is arranged as a rotating roller 671 and a fixed roller 672, so that the rotating roller 671 and the fixed roller 672 can relatively rotate, so that when the gas extrusion roller 671 extrudes the gas guide pipe 3, the movement between the gas extrusion roller 3 and the gas guide pipe 3 is rolling friction, reducing the friction between the two and the wear of the gas guide pipe 3, and improving the service life of the gas guide pipe 3.

[0058] The limiting groove can limit the gas guide pipe 3, preventing the gas guide roller 67 from deviating when the gas guide roller 67 extrudes the gas guide pipe 3; and the conventional limiting groove cannot extrude the gas guide pipe 3 well, so that the gas in the gas guide pipe 3 cannot be discharged completely. Therefore, the limiting groove is arranged as a plurality of limiting units; when the gas extrusion roller 67 is pressed on the gas guide pipe 3, the limiting unit corresponding to the part of the gas guide pipe 3 that is pressed moves downward against the abutting force of the abutting spring 82, and the remaining limiting units can still limit the gas guide pipe 3, so that the gas extrusion roller 67 can extrude the gas in the gas guide pipe 3 sufficiently.

[0059] Embodiment 3: Referring to Figures 3 to 5 As shown in the figure, the present example is similar in structure to embodiment 2, except that the guide groove includes a horizontal guide groove 631, an inclined guide groove 632, a return guide groove 633, and a reset guide groove 634. One end of the horizontal guide groove 631 is connected to the inclined guide groove 632, and the other end of the horizontal groove 631 is connected to the return guide groove 633. The end of the return guide groove 633 away from the inclined guide groove 632 is connected to the reset guide groove 634, and the end of the reset guide groove 634 away from the return guide groove 633 is connected to the horizontal guide groove 631.

[0060] The connection between the inclined guide groove 632 and the return guide groove 633 is provided with a one-way guide device 7, which comprises a rotating shaft 71, a one-way guide plate 72 and an abutting block 73. The rotating shaft 71 is fixedly arranged at one side of the inclined guide groove 632, and the abutting block 73 is fixedly arranged at the other side of the inclined guide groove 632. One end of the one-way guide plate 72 is rotationally connected with the rotating shaft 71, and the other end of the one-way guide plate 72 is arranged on the abutting block 73.

[0061] The side edge of the side plate 62 is provided with a sliding groove 66, and a sliding block 65 is arranged in the sliding groove 66. A linear bearing is arranged in the sliding groove 66. The sliding block 65 is connected with the power device 64. The sliding block 65 is provided with a sliding hole 651, and a sliding rod 652 is arranged in the sliding hole 651. One end of the sliding rod 652 slides in the sliding hole 651, and the other end of the sliding rod 652 is connected with a fixed roller 672 at the end of the air squeezing roller 67. The bottom of the sliding hole 651 and the sliding rod 652 are connected through a tightening spring 653, and the tightening spring 653 provides a contraction force for the sliding rod 652.

[0062] The working principle of the embodiment is as follows: after the formation of the aluminum shell battery 26 is completed, the air squeezing roller 67 is driven to move by the power device 64, so that the air squeezing roller 67 can move along the horizontal guide groove 631 and squeeze the air guide pipe 3, so that the gas in the air guide pipe 3 can pass through the flow monitoring meter 5. After the air in the air guide pipe 3 is squeezed, the power device 64 continues to drive the air squeezing roller 67 to move, so that the air squeezing roller 67 moves to the inclined guide groove 632. When the air squeezing roller 67 moves from the inclined guide groove 632 to the return guide groove 633, the air squeezing roller 67 can lift the one-way guide plate 72, so that the air squeezing roller 67 can reach the return guide groove 633. When the air squeezing roller 67 reaches the return guide groove 633, the one-way guide plate 72 falls again by its own gravity and is arranged on the abutting block 73, so that the connection between the inclined guide groove 632 and the return guide groove 633 is closed. Then the power device 64 continues to drive the air squeezing roller 67 to move in the return guide groove 633, and the one-way guide plate 72 prevents the air squeezing roller 67 from returning to the inclined guide groove 632. Then the power device 64 drives the air squeezing roller 67 to fall from the return guide groove 633 to the horizontal guide groove 631 through the reset guide groove 634. Thus, through the reciprocating movement of the power device 64, the air squeezing roller 67 can move in a one-way circular direction along the guide groove. Through the one-way circular movement of the air squeezing roller 67 in the guide groove, the air squeezing roller 67 can squeeze the air guide pipe 3 in one direction, so that the gas in the air guide pipe 3 can enter the air bag 4 as completely as possible.

[0063] It should be noted that: in this embodiment, the tension spring 653 on the squeeze roller 67, so that the squeeze roller 67 can be tightly pressed with the gas guide pipe 3, the gas guide pipe 3 in the direction of the gas bag 4 is extruded; at the same time, the return guide groove 633 extends backward near the end of the inclined guide groove 632, and the return guide groove 633 is provided with a reserved groove, so that when the squeeze roller 3 reaches the reserved groove, the one-way conduction plate 72 can fall onto the abutting block 73; the return guide groove 633 is provided with an inclined slope; the reset guide groove 634 is provided with a limiting groove 635, when the power device 64 is in the initial position, the squeeze roller 67 can be clamped in the limiting groove 635, preventing the squeeze roller 67 from extruding the gas guide pipe 3 in the test process; the two side plates 62 are provided with sliding blocks 65 on both sides, and the sliding blocks 65 are connected with the connecting rod 9, and the connecting rod 9 is connected with the power device 64.

[0064] The above-described embodiments are only the preferred schemes of the present application, and do not limit the present application in any form, and there are other variants and modifications without exceeding the technical scheme recorded in the claims.

Claims

1. An aluminum can battery formation gas collection apparatus, characterized by, The application relates to a battery testing device. The battery testing device comprises a chemical forming cabinet, a support plate arranged at the bottom of the chemical forming cabinet and used for supporting an aluminum shell battery, a test electrode plate, a gas guide pipe, a flow monitoring meter, a gas squeezing device and a gas bag. The test electrode plate is provided with a positive probe and a negative probe. One end of the gas guide pipe is connected with the aluminum shell battery, and the other end of the gas guide pipe is connected with the gas bag. The flow monitoring meter is arranged on the gas guide pipe. The gas guide pipe is arranged in the gas squeezing device. The gas squeezing device comprises a bottom plate, side plates, a gas squeezing roller and a power device. The bottom plate is provided with a limiting groove along the length direction of the bottom plate, and the gas guide pipe is arranged in the limiting groove. The side plates are arranged on both sides of the bottom plate and are provided with guide grooves.

2. The aluminum can battery formation gas collection apparatus of claim 1, wherein, The gas squeezing roller is arranged in the guide grooves.

3. The aluminum can battery formation gas collection apparatus of claim 1, wherein, The power device drives the gas squeezing roller to move along the length direction of the bottom plate.

4. The aluminum can battery formation gas collection apparatus of claim 3, wherein, The gas squeezing roller comprises rotating rollers and fixed rollers arranged at the two ends of the rotating rollers.

5. The aluminum can battery formation gas collection apparatus of claim 1, wherein, The rotating rollers are rotatably connected with the fixed rollers.

6. The aluminum can battery formation gas collection apparatus of claim 1, wherein the limiting groove is The application further comprises a sliding block connected with the power device. The sliding block is provided with a sliding hole and a sliding rod arranged in the sliding hole.

7. The aluminum can battery formation gas generation collection apparatus according to claim 6, characterized by, One end of the sliding rod slides in the sliding hole, and the other end of the sliding rod is connected with the gas squeezing roller. The bottom of the sliding hole is connected with the sliding rod through a tightening spring. The guide grooves comprise horizontal guide grooves and inclined guide grooves. The inclined guide grooves are provided with one-way guide devices at the connection positions of the inclined guide grooves and return guide grooves. One end of the return guide grooves is connected with reset guide grooves, and the other end of the reset guide grooves is connected with the horizontal guide grooves. The upper end surface of the test electrode plate is connected with a spring. One end of the spring is connected with a pressing plate. The one-way guide device comprises a rotating shaft, a one-way guide plate and an abutting block. One end of the one-way guide plate is rotatably connected with the rotating shaft, and the other end of the one-way guide plate is arranged on the abutting block. The gas squeezing roller moves in the guide grooves. The side edges of the side plates are provided with sliding grooves. The sliding blocks are arranged in the sliding grooves. The sliding grooves are provided with linear bearings. The application relates to a battery testing device. The bottom plate is provided with mounting slot holes. The two sides of the mounting slot holes in the width direction are provided with through slots. The limiting plates are arranged in the through slots. The limiting plate comprises a plurality of limiting units. The limiting unit comprises an abutting plate and an abutting spring. The abutting plate is connected with the bottom of the limiting plate. The abutting spring is arranged between the limiting plate and the bottom wall of the mounting slot hole.

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