Lithium belt coating dry method electrolyte membrane production device

Abstract

The utility model discloses a lithium strip coating dry method electrolyte membrane production device, which comprises an upper processing mechanism and a lower processing mechanism, the upper processing mechanism comprises an upper unwinding roller, an upper winding roller and an upper roller pair, the upper roller pair is positioned between the upper unwinding roller and the upper winding roller, and the lower processing mechanism comprises a lower unwinding roller and a lower winding roller. The two ends of a lithium strip are wound on the upper unwinding roller and the upper winding roller respectively, and the lithium strip abuts against the bottom of the upper pair of rollers; the lower processing mechanism comprises a lower unwinding roller, a lower winding roller and a lower roller pair, the lower roller pair is located between the lower unwinding roller and the lower winding roller, the two ends of an electrolyte membrane are wound on the lower unwinding roller and the lower winding roller respectively, and the electrolyte membrane abuts against the top of the lower roller pair; a gap adjusting assembly is arranged between the upper roller pair and the lower roller pair, and the upper winding and unwinding roller and the lower winding and unwinding roller can be exchanged for use. The device has the advantage that the surface smoothness and the thickness uniformity of the composite lithium strip are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a lithium belt-coated dry-process electrolyte membrane production device. Background Art

[0002] At present, the energy density of liquid lithium-ion batteries has almost reached its limit. With the increasing demand in the energy storage market and power battery field, the next generation of all-solid-state batteries is the development trend in the future new energy field. Compared with the current graphite negative electrode, lithium metal has a super high theoretical specific capacity, so ultra-thin metal lithium has become one of the focuses of improving the energy density of all-solid-state batteries.

[0003] However, the existing metal lithium belt has poor mechanical strength and is prone to wrinkling and breaking. The smaller the thickness, the greater the chance of wrinkling and breaking. Furthermore, the current assembly of all-solid-state batteries usually requires cutting to cut the metal lithium belt into the size required for assembling the battery, and compounding it with a dry electrolyte membrane to form a composite lithium belt. However, due to the limitations of the mechanical strength of the metal lithium belt and the dry electrolyte membrane, problems such as breakage and unevenness are prone to occur during the composite process, which in turn affects the performance of the composite lithium belt and is not conducive to the subsequent assembly of solid-state batteries. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a lithium strip coated dry electrolyte membrane production device, which can ensure the surface flatness and thickness uniformity of the composite lithium strip.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a lithium strip coated dry electrolyte membrane production device, including an upper processing mechanism and a lower processing mechanism, the upper processing mechanism includes an upper unwinding roller, an upper winding roller and an upper pair of rollers, the upper pair of rollers is located between the upper unwinding roller and the upper winding roller, the two ends of the lithium strip are respectively wound on the upper unwinding roller and the upper winding roller, and the lithium strip is in contact with the bottom of the upper pair of rollers;

[0006] The lower processing mechanism comprises a lower unwinding roller, a lower winding roller and a lower pair of rollers, wherein the lower pair of rollers is located between the lower unwinding roller and the lower winding roller, and the two ends of the electrolyte membrane are respectively wound on the lower unwinding roller and the lower winding roller, and the electrolyte membrane abuts against the top of the lower pair of rollers;

[0007] A gap adjustment component is provided between the upper pair of rollers and the lower pair of rollers, and the gap adjustment component drives the upper pair of rollers and the lower pair of rollers to move closer to each other or away from each other.

[0008] Preferably, the gap adjustment assembly includes at least two gap adjustment members, wherein the detection end of one of the gap adjustment members is vertically oriented toward one side of the gap between the upper pair of rollers and the lower pair of rollers, and wherein the detection end of the other gap adjustment member is vertically oriented toward the other side of the gap between the upper pair of rollers and the lower pair of rollers.

[0009] Preferably, the upper pair of rollers is at least partially located below the upper unwinding roller and the upper winding roller, and the lower pair of rollers is at least partially located above the lower unwinding roller and the lower winding roller.

[0010] Preferably, the lithium-belt-coated dry-process electrolyte membrane production device further comprises a pressure sensor, and the pressure sensor is connected to the upper pair of rollers and the lower pair of rollers respectively.

[0011] Preferably, the lithium-belt-coated dry-process electrolyte membrane production device further comprises a first temperature detection member and a second temperature detection member, wherein the first temperature detection member is located in the upper roller body, and the second temperature detection member is located in the lower roller body.

[0012] Preferably, the lithium belt coated dry process electrolyte membrane production device further comprises traction rollers, the traction rollers are respectively located on both sides of the lithium belt and the electrolyte membrane, and the traction rollers are staggered with each other;

[0013] A traction film is provided on the surface of the traction roller.

[0014] Preferably, the lithium strip-coated dry-process electrolyte membrane production device further comprises a tension detector, and the tension detector is respectively connected to the upper unwinding roller, the upper winding roller, the lower unwinding roller, and the lower winding roller.

[0015] Preferably, the lithium belt coated dry-process electrolyte membrane production device further comprises a deviation correction component, and the deviation correction component is respectively sleeved on the lithium belt and the electrolyte membrane.

[0016] Preferably, the upper unwinding roller, the upper winding roller, the upper pair of rollers, the lower unwinding roller, the lower winding roller, the lower pair of rollers and the traction roller are respectively connected to drive motors, and the drive motors are independent of each other.

[0017] Preferably, the upper unwinding roller, the upper winding roller, the upper pair of rollers, the lower unwinding roller, the lower winding roller, the lower pair of rollers and the traction roller are respectively provided with a frame for support.

[0018] The implementation of this utility model has the following beneficial effects:

[0019] The utility model uses an upper unwinding roller and a lower unwinding roller to convey and unwind the lithium belt and the electrolyte membrane, and cooperates with the upper pair of rollers and the lower pair of rollers to pressurize and compound the lithium belt and the electrolyte membrane. Subsequently, the upper winding roller and the lower winding roller are respectively responsible for winding the compounded lithium belt and the electrolyte membrane for storage and standby.

[0020] Among them, a gap adjustment component is provided between the upper pair of rollers and the lower pair of rollers, and the gap adjustment component drives the upper pair of rollers and the lower pair of rollers to move closer to or away from each other. Since the composite process is an embedded process, that is, the lithium belt is composited to the electrolyte membrane with a certain pressure, the gap between the upper pair of rollers and the lower pair of rollers is precisely adjusted to control the thickness of the lithium belt and the electrolyte membrane, thereby ensuring the surface flatness and thickness uniformity of the composite lithium belt. In addition, this product can composite the lithium belt and the electrolyte membrane through a simple structure, without the need for artificially complicated processes, improving production efficiency and promoting the engineering process in the field of all-solid-state batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a lithium belt-coated dry-process electrolyte membrane production device of the utility model;

[0022] Figure 2 It is a structural diagram of an upper pair of rollers and a lower pair of rollers of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. It is hereby stated that the directional words such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the utility model are only based on the accompanying drawings of the utility model, and are not specific limitations of the utility model.

[0024] Combination Figure 1 and Figure 2 In one embodiment of the utility model, a lithium strip coated dry electrolyte membrane production device is provided, comprising an upper processing mechanism and a lower processing mechanism, wherein the upper processing mechanism comprises an upper unwinding roller 11, an upper winding roller 21 and an upper pair of rollers 31, wherein the upper pair of rollers 31 is located between the upper unwinding roller 11 and the upper winding roller 21, and as one of the embodiments, the two ends of the lithium strip 4 are respectively wound around the upper unwinding roller 11 and the upper winding roller 21, and the lithium strip 4 is in contact with the bottom of the upper pair of rollers 31;

[0025] The lower processing mechanism includes a lower unwinding roller 12, a lower winding roller 22 and a lower pair of rollers 32, wherein the lower pair of rollers 32 is located between the lower unwinding roller 12 and the lower winding roller 22, and the two ends of the electrolyte membrane 5 are respectively wound around the lower unwinding roller 12 and the lower winding roller 22, and the electrolyte membrane 5 is in contact with the top of the lower pair of rollers 32;

[0026] The utility model is responsible for conveying and unwinding the lithium ribbon 4 and the dry electrolyte membrane 5 through the upper unwinding roller 11 and the lower unwinding roller 12, and the upper pair of rollers 31 and the lower pair of rollers 32 cooperate with each other to pressurize and compound the lithium ribbon 4 and the dry electrolyte membrane 5. Subsequently, the upper winding roller 21 and the lower winding roller 22 are responsible for winding the composite lithium ribbon 4 and the dry electrolyte membrane 5 for storage and standby;

[0027] Among them, a gap adjustment component is provided between the upper pair of rollers 31 and the lower pair of rollers 32, and the gap adjustment component drives the upper pair of rollers 31 and the lower pair of rollers 32 to move closer to or away from each other. Since the composite process is an embedded process, that is, the lithium strip 4 is composited to the dry electrolyte membrane 5 with a certain pressure, the gap between the upper pair of rollers 31 and the lower pair of rollers 32 is precisely adjusted to control the thickness of the lithium strip 4 and the dry electrolyte membrane 5, thereby ensuring the surface flatness and thickness uniformity of the composite lithium strip 4. In addition, this product can composite the lithium strip 4 and the dry electrolyte membrane 5 through a simple structure, without the need for artificially complicated processes, thereby improving production efficiency and promoting the engineering process in the field of all-solid-state batteries.

[0028] It should be noted that, as another embodiment, the two ends of the lithium ribbon 4 can be wound on the lower unwinding roller 12 and the lower winding roller 22, respectively, and the lithium ribbon 4 abuts against the top of the lower pair of rollers 32; the two ends of the electrolyte membrane 5 can be on the upper unwinding roller 11 and the upper winding roller 21, and the electrolyte membrane 5 abuts against the bottom of the upper pair of rollers 31. Among them, the upper unwinding roller 11 and the upper winding roller 21 can be used interchangeably, and the lower unwinding roller 12 and the lower winding roller 22 can also be used interchangeably, without limitation to each other, thereby improving the flexibility of use of the production device.

[0029] Furthermore, the gap adjustment assembly includes at least two gap adjustment members, wherein a detection end of one of the gap adjustment members is vertically oriented toward one side of the gap between the upper pair of rollers 31 and the lower pair of rollers 32, and a detection end of the other gap adjustment member is vertically oriented toward the other side of the gap between the upper pair of rollers 31 and the lower pair of rollers 32, thereby accurately detecting and adjusting the gap length between the upper pair of rollers 31 and the lower pair of rollers 32, thereby ensuring the uniformity of the thickness of the composite film.

[0030] Preferably, in order to further ensure the flatness of the lithium strip 4 and the dry electrolyte membrane 5, the upper pair of rollers 31 is at least partially located at the bottom of the upper unwinding roller 11 and the upper winding roller 21, and the lower pair of rollers 32 is at least partially located at the top of the lower unwinding roller 12 and the lower winding roller 22.

[0031] It should be noted that, as one of the embodiments, the roller diameter of the upper pair of rollers 31 is ≥300mm; the roller length is ≥350mm, the roller diameter of the lower pair of rollers 32 is ≥300mm; the roller length is ≥350mm; the gap between the upper pair of rollers 31 and the lower pair of rollers 32 ranges from 0 to 5mm.

[0032] More preferably, the lithium-belt-coated dry electrolyte membrane production device also includes a pressure sensor 6, which is connected to the upper pair of rollers 31 and the lower pair of rollers 32 respectively, so as to adjust the pressure between the upper pair of rollers 31 and the lower pair of rollers 32, thereby achieving the purpose of precise pressure application.

[0033] More preferably, the lithium-strip-coated dry electrolyte membrane production device also includes a first temperature detection member and a second temperature detection member, wherein the first temperature detection member is located in the upper roller body and the second temperature detection member is located in the lower roller body to accurately control the temperature during compounding.

[0034] On the other hand, combined again Figure 1 and Figure 2 In order to guide and correct deviations, the lithium ribbon coated dry-process electrolyte membrane production device also includes a traction roller 7, which is respectively located on both sides of the lithium ribbon 4 and the electrolyte membrane 5, and the positions of the traction rollers 7 are staggered to ensure the smooth transmission of the lithium ribbon 4 and the electrolyte membrane 5, and the traction rollers 7 are used to correct the conveying deviation of the lithium ribbon 4 and the electrolyte membrane 5, so as to ensure that the lithium ribbon 4 and the electrolyte membrane 5 run at the same speed to the upper pair of rollers 31 and the lower pair of rollers 32 for compounding.

[0035] Furthermore, a traction film is provided on the surface of the traction roller 7 to play a traction role on the lithium strip 4 and the electrolyte membrane 5. It should be noted that the traction film can be selected from at least one of polyethylene terephthalate film (PET film), polypropylene film (PP film), polyethylene (PE film), stainless steel foil, copper foil, aluminum foil and other materials with smooth outer surface.

[0036] Preferably, in order to control the unwinding tension, the lithium strip-coated dry electrolyte membrane production device further includes a tension detector 9, which is respectively connected to the upper unwinding roller 11, the upper winding roller 21, the lower unwinding roller 12, and the lower winding roller 22. The tension detector 9 communicates with the control unit, so that the control unit controls the positions of the unwinding tension swing roller and the winding tension swing roller according to the winding tension and the unwinding tension.

[0037] More preferably, the lithium ribbon coated dry-process electrolyte membrane production device further comprises a deviation correction member 8, and the deviation correction member 8 is respectively sleeved on the lithium ribbon 4 and the electrolyte membrane 5 to further play a role in correcting the deviation.

[0038] In addition, to ensure that each component can operate independently, the upper unwinding roller 11, the upper winding roller 21, the upper pair of rollers 31, the lower unwinding roller 12, the lower winding roller 22, the lower pair of rollers 32 and the traction roller 7 are respectively connected to drive motors, and the drive motors are independent of each other to ensure that the rotation of each roller does not interfere with each other.

[0039] Preferably, the upper unwinding roller 11, the upper winding roller 21, the upper pair of rollers 31, the lower unwinding roller 12, the lower winding roller 22, the lower pair of rollers 32 and the traction roller 7 are respectively provided with a frame 10 for support to ensure structural stability and product safety.

[0040] It should be noted that the upper unwinding roller 11, the upper winding roller 21, the upper pair of rollers 31, the lower unwinding roller 12, the lower winding roller 22, the lower pair of rollers 32, the traction roller 7 and the frame 10 are all structural components made of stainless steel or tungsten steel to further ensure the structural stability.

[0041] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A lithium-belt-coated dry-process electrolyte membrane production device, characterized in that: It comprises an upper processing mechanism and a lower processing mechanism, wherein the upper processing mechanism comprises an upper unwinding roller, an upper winding roller and an upper pair of rollers, wherein the upper pair of rollers is located between the upper unwinding roller and the upper winding roller, and the two ends of the lithium ribbon are respectively wound around the upper unwinding roller and the upper winding roller, and the lithium ribbon abuts against the bottom of the upper pair of rollers; The lower processing mechanism comprises a lower unwinding roller, a lower winding roller and a lower pair of rollers, wherein the lower pair of rollers is located between the lower unwinding roller and the lower winding roller, and the two ends of the electrolyte membrane are respectively wound on the lower unwinding roller and the lower winding roller, and the electrolyte membrane abuts against the top of the lower pair of rollers; A gap adjustment component is provided between the upper pair of rollers and the lower pair of rollers, and the gap adjustment component drives the upper pair of rollers and the lower pair of rollers to move closer to each other or away from each other.

2. The lithium-belt-coated dry electrolyte membrane production device according to claim 1, characterized in that: The gap adjustment assembly includes at least two gap adjustment members, wherein a detection end of one of the gap adjustment members is vertically oriented toward one side of the gap between the upper pair of rollers and the lower pair of rollers, and wherein a detection end of the other gap adjustment member is vertically oriented toward the other side of the gap between the upper pair of rollers and the lower pair of rollers.

3. The lithium-belt-coated dry electrolyte membrane production device according to claim 1, characterized in that: The upper pair of rollers is at least partially located below the upper unwinding roller and the upper winding roller, and the lower pair of rollers is at least partially located above the lower unwinding roller and the lower winding roller.

4. The lithium-belt-coated dry electrolyte membrane production device according to claim 1, characterized in that: The lithium-belt-coated dry-process electrolyte membrane production device further comprises a pressure sensor, and the pressure sensor is respectively connected to the upper pair of rollers and the lower pair of rollers.

5. The lithium-belt-coated dry electrolyte membrane production device according to claim 4, characterized in that: The lithium-belt-coated dry-process electrolyte membrane production device further includes a first temperature detection member and a second temperature detection member, wherein the first temperature detection member is located in the upper pair of rollers, and the second temperature detection member is located in the lower pair of rollers.

6. The lithium-belt-coated dry-process electrolyte membrane production device according to claim 1, characterized in that: The lithium belt coated dry electrolyte membrane production device also includes traction rollers, which are respectively located on both sides of the lithium belt and the electrolyte membrane, and the traction rollers are staggered with each other; A traction film is provided on the surface of the traction roller.

7. The lithium-belt-coated dry electrolyte membrane production device according to claim 1, characterized in that: The lithium strip-coated dry-process electrolyte membrane production device also includes a tension detector, which is connected to the upper unwinding roller, the upper winding roller, the lower unwinding roller, and the lower winding roller respectively.

8. The lithium-belt-coated dry-process electrolyte membrane production device according to claim 1, characterized in that: The lithium belt coated dry electrolyte membrane production device further comprises a deviation correction component, which is respectively sleeved on the lithium belt and the electrolyte membrane.

9. The lithium-belt-coated dry-process electrolyte membrane production device according to claim 1, characterized in that: The upper unwinding roller, the upper winding roller, the upper pair of rollers, the lower unwinding roller, the lower winding roller, the lower pair of rollers and the traction roller are respectively connected to drive motors, and the drive motors are independent of each other.

10. The lithium-belt-coated dry-process electrolyte membrane production device according to claim 1, characterized in that: The upper unwinding roller, the upper winding roller, the upper pair of rollers, the lower unwinding roller, the lower winding roller, the lower pair of rollers and the traction roller are respectively provided with frames for supporting.

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