Novel preset lithium equipment of lithium ion capacitor

Abstract

The utility model relates to the technical field of lithium ion capacitors, in particular to novel lithium presetting equipment for a lithium ion capacitor, which comprises a vertical frame, a feeding mechanism and a pressing mechanism. According to the technical scheme, the feeding mechanism comprises a lithium sheet feeding roll and a metal mesh foil feeding roll which are arranged on the front portion of the vertical frame and arranged up and down, the pressing mechanism comprises a first-stage rolling wheel set, a second-stage rolling wheel set and a third-stage rolling wheel set which are arranged on the rear portion of the vertical frame, and a lithium sheet guide roller set is arranged between the lithium sheet feeding roll and the first-stage rolling wheel set; a metal mesh foil guide roller set is arranged between the metal mesh foil feeding roll and the first-stage rolling wheel set, a lithium sheet protective film recycling roll is arranged at the position, below the lithium sheet guide roller set, of the vertical frame, and the pressing force of the first-stage rolling wheel set, the pressing force of the second-stage rolling wheel set and the pressing force of the third-stage rolling wheel set are sequentially increased. According to the equipment, the problem of poor working continuity is solved, and the working efficiency and the presetting quality are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion capacitors, in particular to a novel lithium pre-setting device for lithium ion capacitors, which is suitable for manufacturing negative electrode sheets of lithium ion capacitors. Background Art

[0002] The negative electrode of lithium-ion capacitors has the advantages of strong conductivity, active electrochemical properties, strong reducibility, small electrochemical equivalent, and large theoretical specific capacity by pre-installing lithium sheets. Since metallic lithium itself is very soft, the lithium sheet and the conductive metal wire are usually pressed together in the process of making the negative electrode to play a supporting role. The conductive metal wire can also be used as a current collector for conduction.

[0003] For example, CN 221125989 U discloses a lithium sheet metal wire laminating device, which includes a platform, a lifting mechanism, a wire pulling mechanism and a pressure roller mechanism. The lifting mechanism is connected to the platform to drive the platform to lift. The wire pulling mechanism includes a first driving component, a first clamping jaw and a second clamping jaw, the first clamping jaw is arranged on one side of the platform along a first direction, the second clamping jaw is connected to the first driving component, the first driving component can drive the second clamping jaw to move along the first direction, the first clamping jaw and the second clamping jaw are both used to clamp the metal wire, and the second clamping jaw can pull the metal wire on the first clamping jaw to move to the other side of the platform along the first direction; the pressure roller mechanism can press the metal wire onto the lithium sheet. The device is intended to tighten the metal wire above the lithium sheet through the first clamp and the second clamp, and press the metal wire onto the lithium sheet through the pressure roller mechanism, so as to reduce manual operation, improve production efficiency, and reduce the occurrence of metal wire breaking. However, the following problems exist during use: 1. Multiple metal wires are each subjected to tension and move forward, and there is a great risk of being broken, which affects the continuity of work; 2. Before work, the lithium sheet is placed on the platform, and then the metal wire is pressed on the upper surface of the lithium sheet. After the pressing is completed, the metal wire is cut and all parts are reset, and the lithium sheet is removed to complete the pressing operation. Another lithium sheet needs to be placed on the platform, and the metal wire is pressed again. The work efficiency still needs to be improved; 3. The one-time forming using the pressure roller can easily cause the lithium sheet to deform, affecting the preset quality. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of lithium presetting equipment for lithium ion capacitors with reasonable structure and reliable use, so as to solve the problem of poor working continuity and significantly improve working efficiency and presetting quality.

[0005] The technical solution of the utility model is:

[0006] A novel lithium pre-placement device for lithium-ion capacitors comprises a stand, a feeding mechanism and a pressing mechanism arranged on the stand, and the technical key points are: the feeding mechanism comprises a lithium sheet feeding roll and a metal mesh foil feeding roll arranged at the front of the stand and arranged up and down, the pressing mechanism comprises a primary roller pressing wheel group, a secondary roller pressing wheel group and a tertiary roller pressing wheel group arranged at the rear of the stand, a lithium sheet guide roller group is arranged between the lithium sheet feeding roll and the primary roller pressing wheel group, a metal mesh foil guide roller group is arranged between the metal mesh foil feeding roll and the primary roller pressing wheel group, the stand is provided with a lithium sheet protective film recovery roll below the lithium sheet guide roller group, and the pressing forces of the primary roller pressing wheel group, the secondary roller pressing wheel group and the tertiary roller pressing wheel group increase in sequence.

[0007] The above-mentioned novel lithium pre-setting equipment for lithium-ion capacitors, the lithium sheet guide roller group includes a first guide roller located behind the lithium sheet upper material roll, a second guide roller located behind the first guide roller, a third guide roller located behind the second guide roller, a fourth guide roller located behind the third guide roller, and a first tension adjustment roller located between the first guide roller and the second guide roller and lower than both. The free end of the lithium sheet on the lithium sheet upper material roll is sequentially introduced into the primary roller pressing wheel group via the top of the first guide roller, the bottom of the first tension adjustment roller, the top of the second guide roller and the third guide roller, and the bottom of the fourth guide roller. The lithium sheet protective film recovery roll is located below the third guide roller, and the lithium sheet protective film is wound on the lithium sheet protective film recovery roll after passing through the third guide roller.

[0008] In the above-mentioned novel lithium pre-setting equipment for lithium-ion capacitors, the first guide roller, the second guide roller and the third guide roller are in contact with the conductive lithium sheet protective film and are all polytetrafluoroethylene rollers, and the first tension adjustment roller and the fourth guide roller are in contact with the conductive lithium sheet and are all ceramic rollers.

[0009] The above-mentioned novel lithium pre-loading equipment for lithium-ion capacitors, the metal mesh foil guide roller group includes a fifth guide roller located behind the metal mesh foil feeding roll, a sixth guide roller located behind the fifth guide roller, a seventh guide roller arranged behind the sixth guide roller, and a second tension adjustment roller located between the sixth guide roller and the seventh guide roller and lower than both. The free end of the metal mesh foil on the metal mesh foil feeding roll is introduced into the primary roller pressing wheel group in sequence through the bottom of the fifth guide roller, the top of the sixth guide roller, the bottom of the second tension adjustment roller and the top of the seventh guide roller.

[0010] In the above-mentioned novel lithium pre-setting equipment for lithium-ion capacitors, the fifth guide roller, the sixth guide roller and the seventh guide roller are all polytetrafluoroethylene rollers, and the second tension adjustment roller is a metal roller.

[0011] The above-mentioned novel lithium pre-setting equipment for lithium ion capacitors, the first-level roller pressing wheel group is composed of an upper-level pressing roller and a lower-level pressing roller arranged in the upper and lower parts, the upper-level pressing roller at the upper position is a polytetrafluoroethylene roller, and the lower-level pressing roller at the lower position is a metal roller; the second-level roller pressing wheel group is composed of an upper-level pressing roller and a lower-level pressing roller arranged in the upper and lower parts, the upper-level pressing roller at the upper position is a polyamide roller, and the lower-level pressing roller at the lower position is a metal roller; the third-level roller pressing wheel group is composed of an upper-level pressing roller and a lower-level pressing roller arranged in the upper and lower parts, the upper-level pressing roller at the upper position is a glass ceramic roller, and the lower-level pressing roller at the lower position is a metal roller, the spacing between the upper-level pressing roller and the lower-level pressing roller is a, the spacing between the upper-level pressing roller and the lower-level pressing roller is b, the spacing between the upper-level pressing roller and the lower-level pressing roller is c, and a>b>c.

[0012] In the above-mentioned new lithium pre-setting equipment for lithium-ion capacitors, the second guide roller is a driving wheel, and the wheel axle is connected to the output end of the servo motor, so as to add a driving component in the middle of the conduction route, combine the master and slave, ensure the stability of the driving force, reduce the empty space, ensure the stability of the tension of the lithium sheet, and avoid the lithium sheet being pulled apart.

[0013] The above-mentioned novel lithium pre-setting device for lithium-ion capacitors has a first longitudinal adjustment groove corresponding to a first tension adjustment roller on the stand. When the lithium sheet is tightened, the first tension adjustment roller moves upward and releases gravity after reaching a limit point to maintain the tension of the lithium sheet.

[0014] The above-mentioned new lithium pre-setting device for lithium ion capacitors has a second longitudinal adjustment groove corresponding to the second tension adjustment roller on the stand. When the metal mesh foil is tightened, the second tension adjustment roller moves upward and releases gravity after reaching the limit point to maintain the tension of the metal mesh foil.

[0015] In the above-mentioned novel lithium pre-setting equipment for lithium-ion capacitors, the lithium sheet feeding roll, the metal mesh foil feeding roll and the lithium sheet protective film recovery roll are all controlled by separate servo motors.

[0016] The beneficial effects of the utility model are:

[0017] 1. The metal mesh foil is pressed together with the lithium sheet. Compared with multiple metal wires, the metal mesh foil has high strength and is not easily broken during the feeding process, thus ensuring the continuity of work.

[0018] 2. The pressing force of the first-stage rolling wheel group, the second-stage rolling wheel group and the third-stage rolling wheel group increases in sequence to avoid deformation of the lithium sheet during the pressing process, thereby improving the preset quality.

[0019] 3. The rolled lithium sheets and rolled metal mesh foil are simultaneously conveyed to the pressing mechanism, pressed and drawn out by the pressing mechanism, and then cut or rolled up according to size requirements, with good working continuity and high working efficiency.

[0020] 4. The lithium sheet protective film recovery roll is used to recover the lithium sheet protective film between the layers of the rolled lithium sheets, with a high degree of automation.

[0021] 5. The first tension adjustment roller and the fourth guide roller that are in direct contact with the lithium sheet are ceramic rollers, the first-level pressing roller that is in direct contact with the lithium sheet is a polytetrafluoroethylene roller, the second-level pressing roller is a polyamide roller, and the third-level pressing roller is a glass ceramic roller, so as to avoid chemical effects on the lithium sheet and ensure the quality of the preset lithium. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a working state diagram of the utility model.

[0024] In the figure: 1. lithium sheet feeding roll, 2. metal mesh foil feeding roll, 3. lithium sheet protective film recovery roll, 4. first guide roller, 5. first tension adjustment roller, 6. second guide roller, 7. third guide roller, 8. fourth guide roller, 9. fifth guide roller, 10. sixth guide roller, 11. second tension adjustment roller, 12. seventh guide roller, 13. upper level pressure roller, 14. lower level pressure roller, 15. upper second level pressure roller, 16. lower second level pressure roller, 17. upper third level pressure roller, 18. lower third level pressure roller, 19. lithium sheet, 20. lithium sheet protective film, 21. metal mesh foil, 22. stand, 23. first longitudinal adjustment groove, 24. second longitudinal adjustment groove. DETAILED DESCRIPTION

[0025] The utility model is described in detail according to the accompanying drawings of the specification.

[0026] like Figure 1 , Figure 2 As shown, the novel lithium pre-installed equipment for lithium-ion capacitors includes a stand 22, a loading mechanism and a pressing mechanism arranged on the stand 22.

[0027] Wherein: the feeding mechanism includes a lithium sheet feeding roll 1 and a metal mesh foil feeding roll 2 which are arranged in the front of the stand 22 and arranged up and down. The pressing mechanism includes a primary roller pressing wheel group, a secondary roller pressing wheel group and a tertiary roller pressing wheel group which are arranged in the rear of the stand 22, and the pressing forces of the primary roller pressing wheel group, the secondary roller pressing wheel group and the tertiary roller pressing wheel group increase in sequence. A lithium sheet guide roller group is arranged between the lithium sheet feeding roll 1 and the primary roller pressing wheel group, and a metal mesh foil guide roller group is arranged between the metal mesh foil feeding roll 2 and the primary roller pressing wheel group. The stand 22 is provided with a lithium sheet protective film recovery roll 3 below the lithium sheet guide roller group. The lithium sheet feeding roll 1, the metal mesh foil feeding roll 2 and the lithium sheet protective film recovery roll 3 are all controlled by separate servo motors.

[0028] In this embodiment, the lithium sheet guide roller group includes a first guide roller 4 located behind the lithium sheet feeding roll 1, a second guide roller 6 located behind the first guide roller 4, a third guide roller 7 located behind the second guide roller 6, a fourth guide roller 8 located behind the third guide roller 7, and a first tension adjustment roller 5 located between the first guide roller 4 and the second guide roller 6 and below both. The free end of the lithium sheet 19 on the lithium sheet feeding roll 1 is introduced into the primary roller pressing wheel group via the top of the first guide roller 4, the bottom of the first tension adjustment roller 5, the top of the second guide roller 6 and the third guide roller 7, and the bottom of the fourth guide roller 8 in sequence. The lithium sheet protective film recovery roll 3 is located below the third guide roller 7, and the lithium sheet protective film 20 is wound on the lithium sheet protective film recovery roll 3 after passing through the third guide roller 7. The first guide roller 4, the second guide roller 6, and the third guide roller 7 are in contact with the conductive lithium sheet protective film 20, and are all polytetrafluoroethylene rollers, and the first tension adjustment roller 5 and the fourth guide roller 8 are in contact with the conductive lithium sheet 19, and are all ceramic rollers. The second guide roller 6 is a driving wheel, and the wheel shaft is connected to the output end of the servo motor, so as to add a driving component in the middle of the conduction route, combine the master and slave, ensure the stability of the driving force, reduce the empty space, ensure the stability of the tension of the lithium sheet, and avoid the lithium sheet 19 from being broken.

[0029] The metal mesh foil guide roller group includes a fifth guide roller 9 located behind the metal mesh foil loading roll 2, a sixth guide roller 10 located behind the fifth guide roller 9, a seventh guide roller 12 located behind the sixth guide roller 10, and a second tension adjustment roller 11 located between and below the sixth guide roller 10 and the seventh guide roller 12. The free end of the metal mesh foil 21 on the metal mesh foil loading roll 2 is introduced into the primary roller pressing wheel group in sequence through the bottom of the fifth guide roller 9, the top of the sixth guide roller 10, the bottom of the second tension adjustment roller 11, and the top of the seventh guide roller 12. The fifth guide roller 9, the sixth guide roller 10, and the seventh guide roller 12 are all polytetrafluoroethylene rollers, and the second tension adjustment roller 11 is a metal roller.

[0030] The first-level roller pressing wheel group is composed of an upper-level pressing roller 13 and a lower-level pressing roller 14 arranged in the upper and lower parts, the upper-level pressing roller 13 located in the upper part is a polytetrafluoroethylene roller, and the lower-level pressing roller 14 located in the lower part is a metal roller. The second-level roller pressing wheel group is composed of an upper-level pressing roller 15 and a lower-level pressing roller 16 arranged in the upper and lower parts, the upper-level pressing roller 15 located in the upper part is a polyamide roller, and the lower-level pressing roller 16 located in the lower part is a metal roller. The third-level roller pressing wheel group is composed of an upper-level pressing roller 17 and a lower-level pressing roller 18 arranged in the upper and lower parts, the upper-level pressing roller 17 located in the upper part is a glass ceramic roller, and the lower-level pressing roller 18 located in the lower part is a metal roller. The spacing between the upper-level pressing roller 13 and the lower-level pressing roller 14 is a, the spacing between the upper-level pressing roller 15 and the lower-level pressing roller 16 is b, and the spacing between the upper-level pressing roller 17 and the lower-level pressing roller 18 is c, and a>b>c.

[0031] The stand 22 is provided with a first longitudinal adjustment groove 23 corresponding to the first tension adjustment roller 5. When the lithium sheet 19 is tightened, the first tension adjustment roller 5 moves upward, and releases gravity after reaching the limit point to maintain the tension of the lithium sheet 19. The stand 22 is provided with a second longitudinal adjustment groove 24 corresponding to the second tension adjustment roller 11. When the metal mesh foil 21 is tightened, the second tension adjustment roller 11 moves upward, and releases gravity after reaching the limit point to maintain the tension of the metal mesh foil 21.

[0032] Working principle:

[0033] 1. The free end of the lithium sheet 19 of the lithium sheet loading roll 1 bypasses the lithium sheet guide roller group and extends to the primary rolling wheel group, and the free end of the metal mesh foil 21 on the metal mesh foil loading roll 2 bypasses the metal mesh foil guide roller group and extends to the primary rolling wheel group.

[0034] 2. The lithium sheet 19 and the metal mesh foil 21 simultaneously enter between the upper-level pressing roller 13 and the lower-level pressing roller 14, and the lithium sheet 19 and the metal mesh foil 21 are pressed and positioned. Since the gap is large, the lithium sheet 19 will not be deformed.

[0035] 3. The positioned lithium sheet 19 and metal mesh foil 21 enter between the upper secondary pressing roller 15 and the lower secondary pressing roller 16 to preliminarily press the lithium sheet 19 and the metal mesh foil 21 together.

[0036] 4. The preliminarily pressed lithium sheet 19 and metal mesh foil 21 enter between the upper three-stage pressing roller 17 and the lower three-stage pressing roller 18, and the two materials are completely pressed together by a relatively large pressure. After the three-stage pressing, the pre-lithium process is completed, and the pressed product can be cut or rolled up as needed.

[0037] 5. The lithium sheet protective film 20 is separated from the lithium sheet 19 after passing through the third guide roller 7 and is wound on the lithium sheet protective film recovery roll 3.

[0038] The above embodiments of the present invention are described in detail, but the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A novel lithium pre-loading device for lithium ion capacitors, comprising a stand, a feeding mechanism and a pressing mechanism arranged on the stand, characterized in that: The feeding mechanism includes a lithium sheet feeding roll and a metal mesh foil feeding roll which are arranged at the front of the stand and up and down, the pressing mechanism includes a primary roller pressing wheel group, a secondary roller pressing wheel group and a tertiary roller pressing wheel group which are arranged at the rear of the stand, a lithium sheet guide roller group is arranged between the lithium sheet feeding roll and the primary roller pressing wheel group, a metal mesh foil guide roller group is arranged between the metal mesh foil feeding roll and the primary roller pressing wheel group, the stand is provided with a lithium sheet protective film recovery roll below the lithium sheet guide roller group, and the pressing forces of the primary roller pressing wheel group, the secondary roller pressing wheel group and the tertiary roller pressing wheel group increase sequentially.

2. The novel lithium pre-loading device for lithium ion capacitors according to claim 1 is characterized in that: The lithium sheet guide roller group includes a first guide roller located behind the lithium sheet upper material roll, a second guide roller located behind the first guide roller, a third guide roller located behind the second guide roller, a fourth guide roller located behind the third guide roller, and a first tension adjustment roller located between the first guide roller and the second guide roller and lower than both. The free end of the lithium sheet on the lithium sheet upper material roll is sequentially introduced into the primary roller pressing wheel group via the top of the first guide roller, the bottom of the first tension adjustment roller, the top of the second guide roller and the third guide roller, and the bottom of the fourth guide roller. The lithium sheet protective film recovery roll is located below the third guide roller, and the lithium sheet protective film is wound on the lithium sheet protective film recovery roll after passing through the third guide roller.

3. The novel lithium pre-charged device for lithium ion capacitors according to claim 1 is characterized in that: The metal mesh foil guide roller group includes a fifth guide roller located behind the metal mesh foil loading roll, a sixth guide roller located behind the fifth guide roller, a seventh guide roller located behind the sixth guide roller, and a second tension adjustment roller located between and below the sixth guide roller and the seventh guide roller. The free end of the metal mesh foil on the metal mesh foil loading roll is introduced into the primary roller pressing wheel group via the bottom of the fifth guide roller, the top of the sixth guide roller, the bottom of the second tension adjustment roller, and the top of the seventh guide roller in sequence.

4. The novel lithium pre-loading device for lithium ion capacitors according to claim 1 is characterized in that: The first-level roller pressing wheel group is composed of an upper-level pressing roller and a lower-level pressing roller arranged in the upper and lower parts, the upper-level pressing roller at the upper position is a polytetrafluoroethylene roller, and the lower-level pressing roller at the lower position is a metal roller; the second-level roller pressing wheel group is composed of an upper-level pressing roller and a lower-level pressing roller arranged in the upper and lower parts, the upper-level pressing roller at the upper position is a polyamide roller, and the lower-level pressing roller at the lower position is a metal roller; the third-level roller pressing wheel group is composed of an upper-level pressing roller and a lower-level pressing roller arranged in the upper and lower parts, the upper-level pressing roller at the upper position is a glass ceramic roller, and the lower-level pressing roller at the lower position is a metal roller, the spacing between the upper-level pressing roller and the lower-level pressing roller is a, the spacing between the upper-level pressing roller and the lower-level pressing roller is b, the spacing between the upper-level pressing roller and the lower-level pressing roller is c, and a>b>c.

5. The novel lithium pre-loading device for lithium ion capacitors according to claim 1 is characterized in that: The lithium sheet feeding roll, the metal mesh foil feeding roll and the lithium sheet protection film recovery roll are all controlled by separate servo motors.

6. The novel lithium pre-loading device for lithium ion capacitors according to claim 2 is characterized in that: The first guide roller, the second guide roller and the third guide roller are in contact with the conductive lithium sheet protective film and are all polytetrafluoroethylene rollers. The first tension adjustment roller and the fourth guide roller are in contact with the conductive lithium sheet and are all ceramic rollers.

7. The novel lithium pre-loading device for lithium ion capacitors according to claim 2 is characterized in that: The second guide roller is a driving wheel, and the wheel shaft is connected to the output end of the servo motor.

8. The novel lithium pre-loading device for lithium ion capacitors according to claim 2 is characterized in that: The stand is provided with a first longitudinal adjustment groove corresponding to the first tension adjustment roller.

9. The novel lithium pre-loading device for lithium ion capacitors according to claim 3 is characterized in that: The fifth guide roller, the sixth guide roller and the seventh guide roller are all polytetrafluoroethylene rollers, and the second tension adjustment roller is a metal roller.

10. The novel lithium pre-charged device for lithium ion capacitors according to claim 3, characterized in that: The stand is provided with a second longitudinal adjustment groove corresponding to the second tension adjustment roller.

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