Lithium metal foil temperature control thinning device

Abstract

The utility model discloses a lithium metal foil temperature control thinning device, and relates to the technical field of lithium metal foil auxiliary forming. The device comprises a roller used for extruding and thinning the metal lithium foil; the laser transmitter is positioned on one side of the roller and is used for heating the metal lithium foil; the thermodetector is positioned on the side surface of the laser transmitter and is used for detecting the temperature of the metal lithium foil heated by the laser transmitter; and the cooler is positioned on the other side of the roller and is used for cooling the metal lithium foil thinned by the roller. According to the temperature control thinning device for the metal lithium foil, the metal lithium foil is heated through a high-controllability laser heating method, the deformation resistance of the metal lithium foil is reduced, then the metal lithium foil is rolled through the roller and then cooled, auxiliary forming of thinning of the metal lithium foil is achieved, and the forming limit of the metal lithium foil is improved; the rolled lithium metal foil is cooled by using the cooling gas suitable for the lithium metal foil, so that the surface quality of the formed lithium metal foil is high, and the plate shape and the grain size can meet the requirements of subsequent winding, cutting and use performance.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary forming of metal lithium foil, in particular to a temperature-controlling and thinning device for metal lithium foil. Background Art

[0002] Metal lithium has low strength and strong viscosity. During the roller forming process, it is easy to adhere to the roller surface, making it difficult to peel off the metal lithium foil and affecting the surface quality. During the thinning process of metal lithium foil, metal lithium undergoes strain hardening and fine grain strengthening, the hardness increases and the elongation decreases. It is easy to break when a large deformation occurs. In order to eliminate work hardening and improve the deformation capacity of metal lithium, the metal lithium foil needs to be subjected to auxiliary heat forming. Metal lithium foil has relatively precise requirements for the heating area, and it is necessary to monitor the temperature of the micro-area during the heating process in real time so that timely adjustments can be made. Controlling the temperature of the metal lithium foil thinning is conducive to improving the deformation capacity of the metal lithium foil and the surface quality of the discharged metal lithium foil, and regulating the physical properties of the metal lithium foil.

[0003] In the prior art, auxiliary heat forming is achieved by directly heating the feed lithium foil by contact, or indirectly heating the lithium foil by heating rollers. These two methods cannot guarantee the stability and controllability of the contact. The auxiliary heat forming methods have the problem of instability and cannot accurately control the temperature of the feed lithium foil, which increases the difficulty of controlling the metal lithium foil thinning forming process. After the metal lithium foil is thinned and formed, the cooling of the metal lithium foil after rolling is achieved by adding coolant to the cooling roller or by a cold air blower system. These cooling methods cannot achieve rapid cooling and more accurate control of the cooling time and target temperature, and it is difficult to meet the performance requirements of the required metal lithium foil. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a device for temperature-controlled thinning of metal lithium foil, comprising

[0005] Roller, used for extrusion and thinning of lithium metal foil;

[0006] A laser emitter, located on one side of the roller, is used to heat the lithium metal foil;

[0007] Thermometer, located on the side of the laser emitter, is used to detect the temperature of the metal lithium foil heated by the laser emitter;

[0008] The cooler, located on the other side of the roller, is used to cool the metal lithium foil after the roller is thinned.

[0009] Preferably, the laser emitter is an infrared laser emitter, which forms a heating zone on one side of the roller, the length of the heating zone is 10-100 mm, and the width is 2-8 mm; the thermometer is an infrared thermometer, and the metal lithium foil is heated when passing through the heating zone.

[0010] The heating temperature of metal lithium foil is 30-120℃, which has high requirements for the heating zone. It is necessary to monitor the temperature changes during the heating process in real time so as to make timely adjustments. When using laser to heat metal lithium foil, with the assistance of visual and temperature feedback, the position and angle of the laser can be adjusted to achieve precise heating of the area. The hardness of metal lithium foil is low after roll forming, and it is easy to deform under the action of gravity and external force. In order to regulate the physical properties, stable size and plate shape of metal lithium foil, the rolled metal lithium needs to be quickly cooled to solidify. Since the heating temperature of metal lithium foil does not need to be too high, it can be heated by regional laser irradiation. The infrared laser wavelength of the infrared laser transmitter is 900-1000nm, and the power is 50-70W.

[0011] Preferably, the distance between the heating zone and the roller is 1-100 mm.

[0012] Preferably, the cooler is a gas cooler, and the distance between the cooling area formed by the gas cooler and the roller is 1-100 mm.

[0013] Preferably, the rollers include an upper roller and a lower roller vertically arranged opposite to each other.

[0014] Preferably, support rollers are provided on both sides of the lower roller; the upper ends of the support rollers are 2-3 mm lower than the upper ends of the lower rollers.

[0015] Preferably, swing support rollers are provided on both sides of the rollers, which can move up, down, left and right while rotating, so as to adjust the posture of the metal lithium foil before and after extrusion thinning during unwinding and winding.

[0016] Preferably, the temperature-controlled thinning device for lithium foil further comprises an unwinding roller and a winding roller located on both sides of the roller. The temperature-controlled thinning device for lithium foil is provided with a plurality of unwinding rollers and a plurality of winding rollers.

[0017] Preferably, the unwinding roller and the winding roller are vertically lower than the rolling roller, and a transition support roller is provided between the unwinding roller or the winding roller and the swing support roller on its side; the transition support roller is vertically higher than the unwinding roller or the winding roller, and lower than the swing support roller; the upper end of the swing support roller is at the same height as the upper end of the lower rolling roller.

[0018] The transition support roller and the swing support roller can be used to support the unwinding and rewinding of the metal lithium foil, prevent the metal lithium foil from falling or collapsing during the unwinding process, facilitate the metal lithium foil to enter the heating zone smoothly, and prevent the formed metal lithium foil from deforming during the rewinding process, thereby affecting the performance of the formed metal lithium foil.

[0019] Preferably, the temperature-controlled thinning device for lithium foil further comprises a control platform, which is connected to the roller, the laser emitter, the temperature meter, the cooler, the unwinding roller, and the winding roller for automatic control of the device.

[0020] After receiving image data feedback, the control platform automatically adjusts the parameters of the laser transmitter to realize digital monitoring of the laser processing process of metal lithium foil and improve the efficiency and accuracy of the entire process.

[0021] The cooling gas of the gas cooler is selected from one of high-purity argon, vaporized liquid hydrogen, and a mixture of argon and vaporized liquid hydrogen, wherein the mass percentage of hydrogen in the mixture of argon and vaporized liquid hydrogen is 1-10%. Since metallic lithium reacts with nitrogen and carbon dioxide gases, liquid hydrogen is used as a cooling gas source, which is mixed with high-purity argon and sprayed on the surface of the discharged metallic lithium foil through the gas cooler, thereby achieving rapid cooling and solidification. The mixture of hydrogen and argon will not affect the protective atmosphere and can be recycled through the purification system.

[0022] The control platform controls infrared laser irradiation to achieve full-width heating, and adjusts the temperature of the deformed lithium foil entering between the rollers by controlling the feeding speed (under the same other conditions, the faster the feeding, the shorter the heating time, the less the temperature rise, and the slower the feeding, the less the temperature rise), effectively reducing the deformation resistance and work hardening of the lithium foil, improving the thinning forming limit of the lithium foil and improving the surface quality of the discharged lithium foil. By measuring the temperature of the heating zone and real-time monitoring of the laser heating process of the lithium foil, and feeding the data back to the control platform, the laser heating parameters can be automatically adjusted to meet the processing needs, and the accuracy of laser heating-assisted forming of the lithium foil can be improved.

[0023] The present application provides a metal lithium foil temperature control and thinning device, including a roller for extruding and thinning the metal lithium foil; a laser emitter, located on one side of the roller, for heating the metal lithium foil; a thermometer, located on the side of the laser emitter, for detecting the temperature of the metal lithium foil heated by the laser emitter; a cooler, located on the other side of the roller, for cooling the metal lithium foil after the roller thinning. The metal lithium foil temperature control and thinning device of the present application uses a highly controllable laser heating method to heat the metal lithium foil, reduce the deformation resistance of the metal lithium foil, reduce the defects caused by deformation, and then cools it after rolling by a roller to achieve auxiliary forming of the metal lithium foil thinning, thereby improving the forming limit of the metal lithium foil; using cooling gas suitable for the metal lithium foil, the metal lithium foil after rolling is accurately cooled in a region through a gas cooler, so that the surface quality of the formed metal lithium foil is high, and the plate shape and grain size can meet the requirements of subsequent winding, cutting and use performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 Schematic diagram of a temperature-controlled thinning device for lithium metal foil provided in an embodiment of the utility model.

[0026] Figure 2 A schematic diagram of accessories for the temperature-controlled thinning device for metal lithium foil provided in an embodiment of the utility model.

[0027] Explanation of the symbols in the figure: 1-control platform; 2-infrared laser transmitter; 3-infrared thermometer; 4-gas cooler; 5-upper roller; 6-lower roller; 61-upper end of lower roller; 7-metal lithium foil; 8-unwinding roller; 9-winding roller; 10-unwinding excessive support roller; 101-lower end of unwinding excessive support roller; 11-unwinding swing support roller; 111-lower end of unwinding swing support roller; 112-upper end of unwinding swing support roller; 12-unwinding support roller; 121-upper end of unwinding support roller; 13-winding support roller; 131-upper end of winding support roller; 14-winding swing support roller; 141-lower end of winding swing support roller; 142-upper end of winding swing support roller; 15-overwinding support roller; 151-lower end of overwinding support roller. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0030] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0031] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] Example 1

[0033] like Figure 1-2 As shown, the temperature-controlled thinning device for metal lithium foil of Example 1 includes rollers for extrusion and thinning of metal lithium foil, the rollers include an upper roller 5 and a lower roller 6 arranged vertically opposite to each other; an infrared laser emitter 2 located on one side of the roller, the infrared laser emitter 2 is used to heat the metal lithium foil; an infrared thermometer 3 located on the side of the infrared laser emitter 2, the infrared thermometer 3 is used to detect the temperature of the metal lithium foil heated by the laser emitter; a gas cooler 4 located on the other side of the roller, the cooling area formed by the gas cooler 4 is 5 mm away from the roller, and the gas cooler 4 is used to cool the metal lithium foil after the roller thinning; a control platform 1 for automatic control of the device, the control platform 1 is connected to the roller, the infrared laser emitter 2, the infrared thermometer 3, the gas cooler 4, the unwinding roller 9, and the winding roller 8.

[0034] The infrared laser emitter 2 forms a heating zone on one side of the roller. The length of the heating zone is 60 mm, the width is 5 mm, and the distance between the heating zone and the roller is 5 mm. The metal lithium foil is heated when passing through the heating zone.

[0035] Support rollers are provided on both sides of the lower rolling roller 6. The side close to the heating zone is the unwinding support roller 12, and the upper end 121 of the unwinding support roller is 2 mm lower than the upper end 61 of the lower rolling roller. The side close to the gas cooler 4 is the winding support roller 13, and the upper end 131 of the winding support roller is 2 mm lower than the upper end 61 of the lower rolling roller.

[0036] Swing support rollers are also provided on both sides of the roller, the side close to the heating zone is the unwinding swing support roller 11, and the side close to the gas cooler 4 is the winding swing support roller 14.

[0037] The temperature-controlled thinning device for metal lithium foil also includes an unwinding roller 9 and a winding roller 8 located on both sides of the rolling roller. The unwinding roller 9 and the winding roller 8 are vertically lower than the rolling roller. An over-unwinding support roller 10 is provided between the unwinding roller 9 and the unwinding swing support roller 11. The lower end 101 of the over-unwinding support roller is vertically higher than the upper end 91 of the unwinding roller and lower than the lower end 111 of the unwinding swing support roller. The upper end 112 of the unwinding swing support roller is at the same height as the upper end 61 of the lower rolling roller; an over-winding support roller 15 is provided between the winding roller 8 and the winding swing support roller 14. The lower end 151 of the over-winding support roller is vertically higher than the upper end 81 of the winding roller and lower than the lower end 141 of the winding swing support roller. The upper end 142 of the winding swing support roller is at the same height as the upper end 61 of the lower rolling roller.

[0038] The auxiliary forming method of the metal lithium foil temperature control and thinning device of Example 1 comprises the following steps:

[0039] (1) The metal lithium foil 7 is unwound from the unwinding roller 9 and enters the heating zone. The infrared laser wavelength of the infrared laser emitter 2 is adjusted to 950 nm and the power is 60 W. The infrared laser emitter 2 heats the metal lithium foil 7 at a temperature of 80° C. for a heating time of 2 seconds. After the heating is completed, the metal lithium foil 7 enters the roller for rolling;

[0040] (2) After rolling, the metal lithium foil 7 enters the gas cooler 4, and the gas cooler 4 cools the metal lithium foil 7 after rolling. The cooling gas is a mixture of argon and gasified liquid hydrogen (the mass percentage of hydrogen is 5%), the cooling temperature is -10°C, and the cooling time is 2s;

[0041] (3) After cooling, the formed metal lithium foil is obtained and rolled up.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A device for temperature-controlled thinning of lithium metal foil, characterized in that: include Roller, used for extrusion and thinning of lithium metal foil; A laser emitter, located on one side of the roller, is used to heat the lithium metal foil; Thermometer, located on the side of the laser emitter, is used to detect the temperature of the metal lithium foil heated by the laser emitter; The cooler, located on the other side of the roller, is used to cool the metal lithium foil after the roller is thinned.

2. The device for temperature-controlled thinning of metal lithium foil according to claim 1, characterized in that: The laser emitter is an infrared laser emitter, which forms a heating zone on one side of the roller. The length of the heating zone is 10-100mm and the width is 2-8mm. The thermometer is an infrared thermometer, and the metal lithium foil is heated when passing through the heating zone.

3. The device for temperature-controlled thinning of metal lithium foil according to claim 2, characterized in that: The distance between the heating zone and the roller is 1-100 mm.

4. The device for temperature-controlled thinning of metal lithium foil as claimed in claim 3, characterized in that: The cooler is a gas cooler, and the distance between the cooling area formed by the gas cooler and the roller is 1-100 mm.

5. The device for temperature-controlled thinning of metal lithium foil as claimed in claim 4, characterized in that: The rollers include an upper roller and a lower roller which are arranged vertically opposite to each other.

6. The device for temperature-controlled thinning of metal lithium foil as claimed in claim 5, characterized in that: Support rollers are arranged on both sides of the lower roller; the upper ends of the support rollers are 2-3 mm lower than the upper ends of the lower rollers.

7. The device for temperature-controlled thinning of metal lithium foil according to claim 6, characterized in that: Swing support rollers are also provided on both sides of the roller.

8. The device for temperature-controlled thinning of metal lithium foil according to claim 7, characterized in that: It also includes an unwinding roller and a winding roller located on both sides of the roller.

9. The device for temperature-controlled thinning of metal lithium foil as claimed in claim 8, characterized in that: The unwinding roller and the winding roller are lower than the rolling roller in the vertical direction, and a transition support roller is provided between the unwinding roller or the winding roller and the swing support roller on the side thereof; the transition support roller is higher than the unwinding roller or the winding roller in the vertical direction, and lower than the swing support roller; the upper end of the swing support roller is at the same height as the upper end of the lower rolling roller.

10. The device for temperature-controlled thinning of metal lithium foil according to claim 9, characterized in that: It also includes a control platform, which is connected to the roller, the laser transmitter, the temperature meter, the cooler, the unwinding roller, and the winding roller for automatic control of the device.

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