A battery electrode separator processing device

Abstract

The utility model provides a kind of battery electrode separator processing device, belong to battery processing technical field, including air float type guide pipe, air float type guide pipe is located below and above battery electrode separator respectively, air float type guide pipe has hollow inner chamber in, air float type guide pipe is opened with one or more continuous gas escape slit along its axial direction;Air float type guide pipe one end is opened with the gas inlet port being communicated with hollow inner chamber, gas inlet port is fixedly connected with external gas source;Air float type guide pipe two ends are provided with mounting support;Wherein, gas inlet port, hollow inner chamber and gas escape slit jointly constitute a constant pressure gas cavity.The battery electrode separator processing device, by setting gas inlet port, hollow inner chamber and gas escape slit jointly constitute a constant pressure gas cavity, can be passed into compressed gas and form air cushion, realize the non-contact support and guide to battery electrode separator, greatly improve the yield of separator processing.

Description

Technical Field

[0001] This utility model relates to the field of storage battery processing technology, specifically to a storage battery electrode separator processing device. Background Technology

[0002] In the manufacturing process of batteries (especially lithium-ion batteries), the electrode separator is a crucial internal component, its quality directly affecting the battery's safety, capacity, and cycle life. During the winding, slitting, and transport of the separator, traditional guiding methods often employ contact rollers. However, separator materials are typically very thin and have fragile surfaces (such as polyolefin microporous membranes), making them highly susceptible to burrs, microcracks, or dust buildup from physical contact with the rollers. These microscopic defects can become short-circuit points within the battery, inducing lithium dendrite growth during charging and discharging, potentially leading to thermal runaway or even fire and explosion, posing serious safety hazards. Therefore, improvements are needed. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides a battery electrode separator processing device that overcomes or at least partially solves the above technical problems.

[0004] This utility model is implemented as follows: This utility model provides a battery electrode separator processing device, including an air-floating guide tube, which is located below and above the battery electrode separator. The air-floating guide tube has a hollow inner cavity, and one or more continuous gas escape slits are opened on the outer wall of the air-floating guide tube along its axial direction. One end of the air-floating guide tube has an air inlet that communicates with the hollow inner cavity, and the air inlet is fixedly connected to an external air source. Mounting supports are provided at both ends of the air-floating guide tube. The air inlet, the hollow inner cavity, and the gas escape slits together form a constant pressure air chamber.

[0005] In one embodiment of this utility model, a pressure equalization element is further provided in the constant pressure air chamber, and one end of the pressure equalization element is fixedly connected to the air inlet.

[0006] In one embodiment of this utility model, the pressure equalization element includes a main pressure equalization tube, one end of which is sealed, and the other end of which is fixedly connected to an air inlet. A pressure stabilizing sleeve is fitted onto the outer wall of the main pressure equalization tube. A plurality of first-stage pressure equalization holes are formed on the tube wall of the main pressure equalization tube. The first-stage pressure equalization holes guide the airflow from inside the main pressure equalization tube into the pressure stabilizing sleeve. A plurality of second-stage pressure equalization holes are formed on the cylinder wall of the pressure stabilizing sleeve. The second-stage pressure equalization holes guide the airflow inside the pressure stabilizing sleeve into a hollow inner cavity.

[0007] In one embodiment of this utility model, the diameter of the first-stage equalizing hole on the main equalizing pipe gradually increases along the axial direction of the main equalizing pipe from the end near the air inlet to the sealing end.

[0008] In one embodiment of this utility model, the diameter of the second-stage equalizing hole on the pressure stabilizing sleeve gradually increases from one end near the air inlet to the other along the axial direction of the pressure stabilizing sleeve.

[0009] In one embodiment of this utility model, the total number of the first-stage pressure equalization holes is less than the total number of the second-stage pressure equalization holes.

[0010] In one embodiment of this utility model, the pressure stabilizing sleeve is filled with a porous medium material, which is a sintered metal mesh or foam ceramic.

[0011] Furthermore, the two ends of the air-floating guide pipe (100) are fitted with supports (200) by means of quick-install flanges and O-ring seals.

[0012] The battery electrode separator processing device provided by this utility model has the following advantages: 1. The air inlet, hollow inner cavity and gas outlet slit together form a constant pressure air chamber. This structure can introduce compressed gas and form an air cushion to achieve non-contact support and guidance for the battery electrode separator. This fundamentally avoids the scratching, wear and dust generation caused by traditional contact guide rollers, and greatly improves the yield of separator processing.

[0013] 2. By employing a double-layer structure of a main pressure equalizing pipe and a pressure stabilizing sleeve, and separately opening first-stage and second-stage pressure equalizing holes, a two-stage progressive pressure stabilization system is formed. The airflow first undergoes initial diffusion and throttling through the first-stage pressure equalizing holes, then enters the pressure stabilizing sleeve for buffering and mixing. It then undergoes secondary uniform distribution through a larger number of second-stage pressure equalizing holes, ultimately ensuring extremely uniform and stable airflow pressure entering the main gas chamber. This guarantees a high degree of uniformity in the airflow at the gas outlet, thereby generating a flat, stable, and reliable air cushion. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram provided by an embodiment of the present utility model; Figure 2 A schematic diagram of the air-floating guide tube structure provided for an embodiment of this utility model; Figure 3 A schematic diagram of the voltage equalization element structure provided for an embodiment of this utility model; Figure 4 A schematic diagram of the main equalizing pipe structure provided for an embodiment of this utility model.

[0016] In the diagram: 100, air-float guide tube; 110, hollow inner cavity; 120, gas escape slit; 130, air inlet; 200, mounting bracket; 300, pressure equalization element; 310, main pressure equalization pipe; 320, first-stage pressure equalization hole; 330, pressure stabilizing sleeve; 340, second-stage pressure equalization hole. Detailed Implementation

[0017] 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 with reference to the accompanying drawings. 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 scope of protection of this utility model. Example

[0018] Reference Figures 1-4 This technical solution provides a battery electrode separator processing device, which includes an air-floating guide tube 100, which is located below and above the battery electrode separator. The air-floating guide tube 100 has a hollow inner cavity 110. The outer wall of the air-floating guide tube 100 has one or more continuous gas escape slits 120 along its axial direction. One end of the air-floating guide tube 100 has an air inlet 130 communicating with the hollow inner cavity 110. The air inlet 130 is fixedly connected to an external air source. Mounting supports 200 are provided at both ends of the air-floating guide tube 100.

[0019] It should be noted that the width of the gas escape slit 120 is 0.1 mm to 0.5 mm, and the cross-section of the air-floating guide tube 100 is circular, elliptical, or rectangular.

[0020] The air inlet 130, the hollow inner cavity 110, and the gas outlet 120 together form a constant pressure air chamber.

[0021] The battery electrode separator processing device, through the air inlet 130, the hollow inner cavity 110 and the gas escape slit 120, forms a constant pressure air chamber. This structure can introduce compressed gas and form an air cushion, realizing non-contact support and guidance for the battery electrode separator. It fundamentally avoids the scratching, wear and dust generation caused by traditional contact guide rollers, and greatly improves the yield of separator processing.

[0022] Reference Figures 2-4 Based on the same concept as in Embodiment 1 above, this embodiment also proposes that a pressure equalization element 300 is provided in the constant pressure air chamber, and one end of the pressure equalization element 300 is fixedly connected to the air inlet 130.

[0023] By adding a pressure equalization element 300 inside the constant pressure air chamber, the structure can initially stabilize and equalize the original turbulent airflow entering from the air inlet 130, effectively suppressing pressure fluctuations and eddy currents in the chamber, laying a preliminary foundation for the formation of a stable air cushion, and solving the problem of unstable air cushion in the original design.

[0024] Specifically, the pressure equalization element 300 includes a main pressure equalization pipe 310, one end of which is sealed, and the other end of which is fixedly connected to the air inlet 130. A pressure stabilizing sleeve 330 is fitted on the outer wall of the main pressure equalization pipe 310. Several first-stage pressure equalization holes 320 are opened on the pipe wall of the main pressure equalization pipe 310. The first-stage pressure equalization holes 320 guide the airflow from the main pressure equalization pipe 310 into the pressure stabilizing sleeve 330. Several second-stage pressure equalization holes 340 are opened on the cylinder wall of the pressure stabilizing sleeve 330. The second-stage pressure equalization holes 340 guide the airflow in the pressure stabilizing sleeve 330 into the hollow inner cavity 110.

[0025] It should be noted that the first-stage equalizing holes 320 are arranged in a circular array on the wall of the main equalizing pipe 310, and the second-stage equalizing holes 340 are arranged in a circular array on the wall of the pressure stabilizing sleeve 330.

[0026] By employing a double-layer structure of a main pressure equalizing pipe 310 and a pressure stabilizing sleeve 330, and respectively opening first-stage pressure equalizing holes 320 and second-stage pressure equalizing holes 340, a two-stage progressive pressure stabilization system is formed. The airflow first undergoes initial diffusion and throttling through the first-stage pressure equalizing holes 320, then enters the pressure stabilizing sleeve 330 for buffering and mixing, and then undergoes secondary uniform distribution through a larger number of second-stage pressure equalizing holes 340. Ultimately, the airflow pressure entering the main gas chamber is extremely uniform and stable, ensuring a high degree of uniformity of the airflow at the gas outlet 120, thereby generating a flat, stable, and reliable air cushion.

[0027] In addition, the total number of first-stage equalizing holes 320 is less than the total number of second-stage equalizing holes 340. The first-stage equalizing holes 320 are responsible for coarse adjustment, using fewer holes for initial distribution; the second-stage equalizing holes 340 are responsible for fine adjustment, using a large number of micro-holes to disperse the airflow into countless fine and stable streams, thereby achieving ultimate uniformity at the micro level and greatly improving the stability of the air cushion.

[0028] Specifically, the diameter of the first-stage equalizing hole 320 on the main equalizing pipe 310 gradually increases along the axial direction of the main equalizing pipe 310 from the end near the air inlet 130 towards the sealing end.

[0029] The diameter of the first-stage equalizing hole 320 is specified to gradually increase axially from the inlet end to the sealing end. This design cleverly compensates for the flow loss caused by pressure attenuation during airflow transmission within the main equalizing pipe 310, ensuring that the gas flow rate from each first-stage equalizing hole 320 is basically consistent along the entire length of the main equalizing pipe 310, thus solving the problem of uneven axial airflow.

[0030] The diameter of the second-stage equalizing hole 340 on the pressure stabilizing sleeve 330 gradually increases from one end near the air inlet 130 to the other end along the axial direction of the pressure stabilizing sleeve 330.

[0031] The diameter of the second-stage equalizing orifice 340 is specified to gradually increase along the axial direction. This design is a further supplement and optimization of the first-stage pressure stabilization effect. It can compensate for the pressure drop loss of the airflow between the pressure stabilizing sleeve 330 and the main air chamber, ensuring that the final output airflow of the entire guide tube is completely uniform in the axial direction, so that the baffle can be lifted flat without any bending or wavy deformation.

[0032] The pressure stabilizing sleeve 330 is filled with a porous medium material, which is either a sintered metal mesh or foam ceramic.

[0033] Filling the pressure-stabilizing sleeve 330 with a porous medium is an effective way to achieve ultimate homogenization. The porous medium can completely disperse and filter the airflow, causing it to seep out uniformly at an extremely low speed. This is equivalent to providing countless nanoscale pressure-equalizing pores, which can completely eliminate any form of turbulence and obtain the highest quality laminar flow air cushion. At the same time, it can also filter impurities in the gas, prevent the escape slits from becoming clogged, and enhance the reliability and service life of the device.

[0034] A pressure sensor (measurement accuracy ±0.2% FS) and a flow sensor (response time <100ms) are installed, and a PID closed-loop control system is configured to achieve constant pressure gas supply. An overpressure protection valve (opening pressure 1.0MPa), an emergency stop button, and a gas source fault alarm system (audible and visual alarm + shutdown interlock) are also installed.

[0035] The core working principle of this battery electrode separator processing device is as follows: through a multi-stage voltage stabilization system, the unstable compressed air introduced from the outside is transformed into an absolutely uniform and stable airflow, which eventually escapes evenly from a narrow slit, forming a flat air curtain cushion, which supports and guides the fragile battery electrode separator in a non-contact manner. Its working process can be divided into the following stages: 1. Airflow input and primary guidance Compressed air supplied by an external air source is introduced into the device through the air inlet 130. The airflow at this time may contain pressure fluctuations and turbulence.

[0036] 2. First-stage equalization and initial diffusion The high-pressure airflow first enters the main equalizing pipe 310.

[0037] The airflow propagates forward along the axial direction of the main equalizing pipe 310. Due to the frictional resistance of the pipe wall, its dynamic pressure gradually decreases, and its static pressure gradually decreases from the inlet end to the sealing end.

[0038] To compensate for this pressure drop, the first-stage equalizing orifice 320 on the main equalizing pipe 310 adopts a variable diameter design, that is, the orifice diameter gradually increases from the air inlet end to the sealing end. This allows more airflow to escape from the lower pressure end, thus ensuring that the total flow rate of airflow remains basically consistent along the entire length of the main equalizing pipe 310.

[0039] The airflow is initially dispersed through these first-stage equalization holes 320 and injected from the inner cavity of the high-pressure main equalization pipe 310 into the inner cavity of the outer pressure stabilizing sleeve 330. This is a process of throttling and initial equalization.

[0040] 3. Second-stage equalization and final distribution The airflow entering the inner cavity of the pressure stabilizing sleeve 330 has undergone initial diffusion, but its uniformity is still insufficient for direct use.

[0041] The airflow then passes through a larger number of second-stage equalizing orifices 340. These orifices also employ a variable-diameter design for further fine pressure compensation.

[0042] These second-stage equalizing holes 340 further disperse the airflow into more finer and smoother streams, and release them evenly into the largest constant-pressure air chamber, namely the hollow inner cavity 110 of the air-floating guide tube 100.

[0043] The pressure stabilizing sleeve 330 is filled with porous media material. The airflow is forced through countless micro-pores, and is extremely homogenized, filtered and stabilized, transforming into a near-perfect laminar flow state before entering the main air chamber.

[0044] 4. Pressure stabilization and air cushion formation At this point, the static pressure of the gas in the constant pressure chamber reaches a highly uniform and stable state.

[0045] Driven by uniform air pressure, the gas escapes from the gas escape slit 120 in a uniform, stable and continuous manner.

[0046] According to the principles of fluid mechanics, the escaping gas will form a stable air cushion between the surface of the air-floating guide tube 100 and the operating battery electrode separator, thereby achieving completely non-contact lifting and guidance of the separator.

[0047] 5. System Integration Application The device is fixed to the frame by mounting bracket 200. In actual production lines, the device is usually arranged symmetrically above and below the partition. The upper device generates an air cushion to apply downward pressure to the partition, while the lower device generates an air cushion to provide upward lifting force. Together, they achieve precise constraint and stable transmission of the partition, completely avoiding any physical contact and damage.

Claims

1. A battery electrode separator processing device, comprising air-floating guide tubes (100), wherein the air-floating guide tubes (100) are respectively located below and above the battery electrode separator, characterized in that: The air-floating guide tube (100) has a hollow inner cavity (110), and the outer wall of the air-floating guide tube (100) has one or more continuous gas escape slits (120) along its axial direction. One end of the air-floating guide tube (100) is provided with an air inlet (130) that communicates with the hollow inner cavity (110), and the air inlet (130) is fixedly connected to an external air source. The air-float guide pipe (100) is provided with mounting supports (200) at both ends. The air inlet (130), the hollow inner cavity (110), and the gas outlet (120) together constitute a constant pressure air chamber.

2. The battery electrode separator processing device according to claim 1, characterized in that, The constant pressure air chamber is also provided with a pressure equalization element (300), one end of which is fixedly connected to the air inlet (130).

3. The battery electrode separator processing device according to claim 2, characterized in that, The equalizing element (300) includes a main equalizing tube (310), one end of which is sealed, and the other end of which is fixedly connected to the air inlet (130). A pressure stabilizing sleeve (330) is fitted on the outer wall of the main equalizing tube (310). Several first-stage equalizing holes (320) are opened on the tube wall of the main equalizing tube (310). The first-stage equalizing holes (320) guide the airflow from the main equalizing tube (310) into the pressure stabilizing sleeve (330). Several second-stage equalizing holes (340) are opened on the cylinder wall of the pressure stabilizing sleeve (330). The second-stage equalizing holes (340) guide the airflow in the pressure stabilizing sleeve (330) into the hollow inner cavity (110).

4. The battery electrode separator processing device according to claim 3, characterized in that, The diameter of the first-stage equalizing hole (320) on the main equalizing pipe (310) gradually increases from the end near the air inlet (130) to the sealing end along the axial direction of the main equalizing pipe (310).

5. The battery electrode separator processing device according to claim 4, characterized in that, The diameter of the second-stage equalizing hole (340) on the pressure stabilizing sleeve (330) gradually increases from one end near the air inlet (130) to the other end along the axial direction of the pressure stabilizing sleeve (330).

6. A battery electrode separator processing apparatus according to any one of claims 3 to 5, characterized in that, The total number of the first-stage equalizing holes (320) is less than the total number of the second-stage equalizing holes (340).

7. The battery electrode separator processing apparatus according to claim 6, characterized in that, The pressure stabilizing sleeve (330) is filled with a porous medium material, which is a metal sintered mesh or foam ceramic.

8. The battery electrode separator processing device according to claim 1, characterized in that, The two ends of the air-floating guide pipe (100) are fitted with supports (200) by means of quick-install flanges and O-ring seals.

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