A processing device for improving the wettability of an electrode
The processing equipment for drilling and double-sided embossing of electrodes has solved the problem of long cell impregnation time, achieving rapid cell impregnation and reduced production costs. It is suitable for processing lithium capacitors or lithium battery cells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING ZHONGLV ZHONGKE LITHIUM-ION CAPACITORS TECHNOLOGY CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-26
AI Technical Summary
Existing lithium capacitors or lithium battery cells require a long period of rest before activation by the first charge and discharge cycle to allow the electrolyte to soak in, which increases production time and cost.
The electrode is perforated using a needle roller, and then double-sided embossing is performed on the electrode using No. 1 and No. 2 embossing rollers. The electrode is then flattened by a roller pressing assembly to form micropores and grooves, thus shortening the immersion time.
The impregnation time has been shortened from 72 hours to 12 hours, reducing production costs and improving the impregnation efficiency of the battery cells, making it suitable for continuous automated production.
Smart Images
Figure CN224417754U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lithium capacitors or lithium batteries, and in particular relates to a processing equipment for improving the wettability of battery cells. Background Technology
[0002] Currently, the internal materials of lithium capacitors or lithium battery cells consist of a positive electrode, a negative electrode, a separator, and an electrolyte. Before the first charge-discharge activation, the assembled cell needs to be left to stand for a period of time to allow the injected electrolyte to fully wet the positive electrode, negative electrode, separator, and other materials. Only after the cell materials are fully wetted can the cell be activated through formation and charge-discharge. Currently, the industry generally uses a high temperature of 45℃ and a normal temperature of 25℃, with a standing time of about 72 hours to allow the electrolyte to wet the cell. The wetting time accounts for a significant portion of the entire cell production process, greatly increasing the process time and production costs. Therefore, how to reduce the wetting time, thereby reducing process time and production costs, is an urgent problem to be solved. Utility Model Content
[0003] In view of this, the present invention aims to propose a processing equipment for improving the wettability of battery cells. By mechanically punching, embossing, and finally rolling the surfaces of the positive and negative electrode sheets, the wettability of the battery cells is improved. The settling time can be reduced to about 12 hours, which greatly shortens the process time and reduces the production cost.
[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0005] A processing device for improving the wettability of battery cells includes a frame and an unwinding roll, a needle roll assembly, a first embossing roll assembly, a second embossing roll assembly, a roll pressing assembly, and a take-up roll, which are sequentially mounted to the frame.
[0006] The unwinding roller is used to unwind the electrode roll and drive the electrode roll to rotate. One end of the electrode passes through the needle roller assembly, the first embossing roller assembly, the second embossing roller assembly and the roll pressing assembly in sequence and is connected to the take-up roller. The take-up roller is used to collect the processed electrode.
[0007] The needle roller assembly is used to punch holes in the electrodes;
[0008] The first embossing roller assembly and the second embossing roller assembly are used to emboss the perforated electrodes.
[0009] The rolling assembly is used to flatten the front and back surfaces of the electrode.
[0010] Furthermore, the needle roller assembly includes a needle roller body and a silicone roller, both of which are mounted to the frame; the needle roller body is provided with a plurality of evenly distributed conical needles with a needle pitch of 1.0*1.0mm, 1.5*1.5mm, or 2.0*2.0mm, and arranged in a crisscross pattern.
[0011] Furthermore, the needle roller body is adjusted for height by a servo motor; the gap between the needle roller body and the silicone roller is 0-3mm, and the servo motor can control the overall downward adjustment of the needle roller.
[0012] Because the deeper the hole is drilled by a conical needle, the larger the hole diameter is. The hole diameter of a conical needle is 0.1mm-0.5mm.
[0013] Furthermore, the first embossing roller assembly includes a first embossing roller body and a first steel roller, and the second embossing roller assembly includes a second embossing roller body and a second steel roller.
[0014] The No. 1 embossing roller body and the No. 1 steel roller are installed on the frame. The No. 1 embossing roller body is used to emboss the front side of the electrode.
[0015] The No. 2 embossing roller body and the No. 2 steel roller are installed on the frame. The No. 2 embossing roller body is used to emboss the back of the electrode.
[0016] Furthermore, the No. 1 embossing roller body and the No. 2 embossing roller body have the same structure. The surface of the No. 1 embossing roller body is provided with a square grid pattern, and the pattern size is 3.0*3.0mm, 4.0*4.0mm, or 5.0*5.0mm. The depth of the pattern pressed into the material is 20-100um, and the width of the indentation formed between two patterns is 0.05-0.5mm.
[0017] Furthermore, the gap between the No. 1 embossing roller assembly and the No. 2 embossing roller assembly is 0-3mm. The upward or downward pressure of the embossing rollers and the depth of the pattern pressed into the material are adjusted by the cylinder.
[0018] Furthermore, the roll forming assembly includes two roll bodies mounted to the frame, and the roll gap between the two roll bodies is adjusted by means of adjusting the wedge through a servo motor and reducer or by hydraulic servo.
[0019] The gap between the two pressure rollers is adjustable from 0 to 3 mm, with an adjustment accuracy of ±1 μm, and the roller pressure is adjustable from 0 to 200 tons.
[0020] Furthermore, a correction mechanism and a tension adjustment mechanism are provided between the unwinding roller and the needle roller assembly; a correction mechanism and a tension adjustment mechanism are provided between the second embossing roller assembly and the rolling assembly; and a correction mechanism is provided between the rolling assembly and the take-up roller.
[0021] Compared with the prior art, the processing equipment for improving the wettability of battery cells described in this utility model has the following advantages:
[0022] (1) The processing equipment for improving the wettability of the battery cell described in this utility model forms micropores and groove structures on the electrode sheet through a combination of needle roller punching, double-sided embossing and roller pressing, which greatly improves the electrolyte wetting efficiency. Compared with the traditional 72-hour standing time, the wetting time can be shortened to about 12 hours, which greatly shortens the process time and reduces the production cost.
[0023] (2) The processing equipment for improving the wettability of battery cells described in this utility model adopts an integrated design of unwinding-drilling-double-sided embossing-roll pressing-rewinding, which avoids electrode damage caused by multiple process transfers. Moreover, the spacing of all roller components can be automatically adjusted, which is suitable for continuous automated production, saves labor costs, and improves work efficiency. Attached Figure Description
[0024] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0025] Figure 1 This is a schematic diagram of a processing device for improving the wettability of battery cells according to an embodiment of the present invention;
[0026] Figure 2 This is an enlarged schematic diagram of the surface pattern of the embossing roller body according to an embodiment of the present invention;
[0027] Figure 3 This is an enlarged schematic diagram of the conical needles on the surface of the needle roller body according to an embodiment of the present invention.
[0028] Explanation of reference numerals in the attached figures:
[0029] 1. Frame; 2. Unwinding roller; 3. Needle roller assembly; 31. Needle roller body; 32. Silicone roller; 4. First embossing roller assembly; 41. First embossing roller body; 42. First steel roller; 5. Second embossing roller assembly; 51. Second embossing roller body; 52. Second steel roller; 6. Roller assembly; 61. Pressure roller body; 7. Rewinding roller; 9. Tension adjustment mechanism; Detailed Implementation
[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0034] A processing device for improving the wettability of battery cells, such as Figures 1-3 As shown, it includes a frame 1 and an unwinding roller 2, a needle roller assembly 3, a first embossing roller assembly 4, a second embossing roller assembly 5, a roller pressing assembly 6, and a take-up roller 7, which are sequentially installed on the frame 1.
[0035] The unwinding roller 2 is used to place the rolled electrode roll and drive the electrode roll to rotate. One end of the electrode roll passes through the needle roller assembly 3, the first embossing roller assembly 4, the second embossing roller assembly 5 and the roller pressing assembly 6 in sequence and is connected to the winding roller 7. The winding roller 7 is used to collect the electrode roll.
[0036] The needle roller assembly 3 is used to punch holes in the electrode;
[0037] The first embossing roller assembly 4 and the second embossing roller assembly 5 are used to emboss the perforated electrodes.
[0038] The roller pressing assembly 6 is used to flatten the front and back surfaces of the electrode.
[0039] Preferably, the needle roller assembly 3 includes a needle roller body 31 and a silicone roller 32, both of which are mounted to the frame 1; the needle roller body 31 is provided with a plurality of evenly distributed conical needles, such as... Figure 3 As shown, the stitch spacing is 1.0*1.0mm, 1.5*1.5mm, or 2.0*2.0mm, and they are arranged in a crisscross pattern.
[0040] Preferably, the needle roller body 31 is adjusted up and down by a servo motor; the gap between the needle roller body 31 and the silicone roller 32 is 0-3mm; adjusting up and down by a servo motor is existing technology and is a conventional technical means for adjusting the gap at present.
[0041] As the drilling depth of the conical needle increases, the drilling diameter also increases. The hole diameter of the conical needle is 0.1mm-0.5mm. Combined with the gradual hole diameter characteristics of the conical needle, the permeability can be flexibly adjusted for different electrode thicknesses.
[0042] Preferably, the first embossing roller assembly 4 includes a first embossing roller body 41 and a first steel roller 42, and the second embossing roller assembly 5 includes a second embossing roller body 51 and a second steel roller 52.
[0043] The No. 1 embossing roller body 41 and the No. 1 steel roller 42 are installed on the frame 1. The No. 1 embossing roller body 41 is used to emboss the front side of the electrode.
[0044] The No. 2 embossing roller body 51 and the No. 2 steel roller 52 are installed on the frame 1. The No. 2 embossing roller body 51 is used to emboss the back of the electrode.
[0045] Preferably, the first embossing roller body 41 and the second embossing roller body 51 have the same structure, such as... Figure 2 As shown, the surface of the first embossing roller body 41 is provided with a square grid pattern, the pattern size is 3.0*3.0mm or 4.0*4.0mm or 5.0*5.0mm; the depth of the pattern pressed into the material is 20-100um, and the width of the indentation formed between two patterns is 0.05-0.5mm; forming a three-dimensional liquid guiding channel, promoting the rapid penetration of electrolyte into the positive and negative electrode materials, and improving ion transport efficiency.
[0046] Preferably, the gap between the first embossing roller assembly 4 and the second embossing roller assembly 5 is adjusted by a cylinder, with an adjustment range of 0-3mm. Adjusting the gap by moving the cylinder up and down is a conventional technical method at present.
[0047] Preferably, the roller pressing assembly 6 includes two roller bodies 61 mounted to the frame 1. The roller gap between the two roller bodies 61 is adjusted by means of a servo motor and reducer adjusting the wedge or by a hydraulic servo. The roller gap range of the two roller bodies 61 is 0-3mm, the adjustment accuracy is ±1um, and the roller pressing pressure is adjustable from 0-200 tons. The means of adjusting the wedge with a servo motor and reducer or the means of hydraulic servo are both conventional technical means in the art.
[0048] Preferably, a correction mechanism and a tension adjustment mechanism 9 are provided between the unwinding roller and the needle roller assembly; a correction mechanism and a tension adjustment mechanism 9 are provided between the second embossing roller assembly and the rolling assembly; a correction mechanism is provided between the rolling assembly and the winding roller; the correction mechanism and the tension adjustment mechanism 9 are both commonly used mechanisms in winding and unwinding equipment, in order to ensure the working stability and efficiency of winding and unwinding.
[0049] Working principle: This equipment unwinds at one end and rewinds at the other end to drive the electrode. During the unwinding and rewinding process, a pair of needle rollers are used to punch holes in the electrode sheet, and then two pairs of embossing rollers are used to emboss both sides. Finally, the electrode sheet is pressed flat by two pressure roller bodies 61 to flatten the protruding needle holes on the surface of the electrode sheet.
[0050] This equipment improves the wettability of lithium capacitors or lithium battery cells by redesigning and reorganizing the roller pressing equipment, incorporating needle rollers and double-sided embossing roller devices, as well as punching and embossing processes.
[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A processing apparatus for improving the wettability of battery cells, characterized in that: It includes a frame and, in sequence, an unwinding roll, a needle roll assembly, a first embossing roll assembly, a second embossing roll assembly, a roll pressing assembly, and a take-up roll; The unwinding roller is used to unwind the electrode roll and drive the electrode roll to rotate. One end of the electrode passes through the needle roller assembly, the first embossing roller assembly, the second embossing roller assembly and the roll pressing assembly in sequence and is connected to the take-up roller. The take-up roller is used to collect the processed electrode. The needle roller assembly is used to punch holes in the electrodes; The first embossing roller assembly and the second embossing roller assembly are used to emboss the perforated electrodes. The rolling assembly is used to flatten the front and back surfaces of the electrode.
2. The processing equipment for improving the wettability of battery cells according to claim 1, characterized in that: The needle roller assembly includes a needle roller body and a silicone roller, both of which are mounted on the frame. The needle roller body is provided with a plurality of evenly distributed conical needles with a needle pitch of 1.0*1.0mm, 1.5*1.5mm, or 2.0*2.0mm, and arranged in a crisscross pattern.
3. The processing equipment for improving the wettability of battery cells according to claim 2, characterized in that: The needle roller body is adjusted for height by a servo motor; the gap between the needle roller body and the silicone roller is 0-3mm, and the servo motor can control the overall downward adjustment of the needle roller. Because the deeper the hole is drilled by a conical needle, the larger the hole diameter is. The hole diameter of a conical needle is 0.1mm-0.5mm.
4. The processing equipment for improving the wettability of battery cells according to claim 1, characterized in that: The first embossing roller assembly includes a first embossing roller body and a first steel roller, and the second embossing roller assembly includes a second embossing roller body and a second steel roller. The No. 1 embossing roller body and the No. 1 steel roller are installed on the frame. The No. 1 embossing roller body is used to emboss the front side of the electrode. The No. 2 embossing roller body and the No. 2 steel roller are installed on the frame. The No. 2 embossing roller body is used to emboss the back of the electrode.
5. The processing equipment for improving the wettability of battery cells according to claim 4, characterized in that: The No. 1 embossing roller body and the No. 2 embossing roller body have the same structure. The surface of the No. 1 embossing roller body is provided with a square grid pattern, and the pattern size is 3.0*3.0mm, 4.0*4.0mm, or 5.0*5.0mm. The depth of the pattern pressed into the material is 20-100um, and the width of the indentation formed between two patterns is 0.05-0.5mm.
6. The processing equipment for improving the wettability of battery cells according to claim 4, characterized in that: The first and second embossing roller assemblies have a roller gap of 0-3mm between each assembly. The upward or downward pressure of the embossing rollers and the depth of the pattern pressed into the material are adjusted by a cylinder.
7. The processing equipment for improving the wettability of battery cells according to claim 1, characterized in that: The roll forming assembly includes two roll bodies mounted on the frame. The roll gap between the two roll bodies is adjusted by adjusting the wedge using a servo motor and reducer or by hydraulic servo adjustment. The roller gap between the two pressure rollers is adjustable from 0 to 3 mm, with an adjustment accuracy of ±1 μm, and the roller pressure is adjustable from 0 to 200 tons.
8. The processing equipment for improving the wettability of battery cells according to claim 1, characterized in that: A correction mechanism and a tension adjustment mechanism are provided between the unwinding roller and the needle roller assembly; a correction mechanism and a tension adjustment mechanism are provided between the No. 2 embossing roller assembly and the roll forming assembly; and a correction mechanism is provided between the roll forming assembly and the take-up roller.