CN210744071U - Lithium film composite mechanism - Google Patents
Lithium film composite mechanism Download PDFInfo
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- CN210744071U CN210744071U CN201921809340.3U CN201921809340U CN210744071U CN 210744071 U CN210744071 U CN 210744071U CN 201921809340 U CN201921809340 U CN 201921809340U CN 210744071 U CN210744071 U CN 210744071U
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- roller
- unwinding mechanism
- lithium
- film
- negative plate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a lithium membrane combined mechanism, including the negative pole piece baseband unwinding mechanism that sets up side by side, go up membrane unwinding mechanism and lower mould unwinding mechanism, set up in negative pole piece baseband unwinding mechanism, go up pre-pressure roller and the compound roller of membrane unwinding mechanism and lower mould unwinding mechanism rear end in order, set up and peel off the pair roller in the lower mould of compound roller rear end, set up side by side and peel off pair roller and lower mould winding mechanism in the last mould of peeling off pair roller rear end in the lower mould, set up side by side and peel off last mould winding mechanism and negative pole piece baseband winding mechanism of pair roller rear end in last mould. The utility model discloses on transferring the negative pole piece with lithium foil on the lithium membrane is complete, compound the in-process of peeling off constantly takes, does not take place to slide simultaneously, has realized the compound continuous high-speed production of lithium membrane.
Description
Technical Field
The utility model relates to a lithium cell technical field specifically is a lithium membrane combined mechanism.
Background
In the lithium ion design and manufacturing process, along with the requirement of the electric automobile on the endurance mileage being higher and higher, the increase of the cell energy density is a necessary choice. The first efficiency of the lithium ion battery cell is improved, active substances are not required to be added, and active substance components are not required to be changed, so that the capacity of the battery cell can be obviously improved, and the method is an effective method for improving the energy density. Meanwhile, the lithium pre-processing technology can inhibit the expansion of the negative electrode, and the cycle life of the battery cell is greatly prolonged.
The main current directions of the pre-lithium process are calendering, evaporation and electrochemical methods, wherein the thickness of the calendered pre-lithium required by lithium foil is less than 5 μm, generally, the lithium foil is firstly calendered on a PET (polyethylene terephthalate) bearing film to form a lithium film with the thickness of less than 5 μm, and then the lithium film is transferred to a negative plate in a composite mode.
In the compounding process, because the pressure of the compounding roller is usually large, the width of the negative plate is large, the negative plate is often broken, the peeling effect of the lithium film is poor, the upper film and the lower film are inconsistent, the lithium film and the negative plate slide relatively, and the like, so that the automatic production of compounding the lithium film is not facilitated.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a lithium membrane combined mechanism, on transferring the lithium paper tinsel on the lithium membrane completely to the negative pole piece, the continuous area of in-process is peeled off to the complex simultaneously, does not take place to slide, has realized the compound continuous high-speed production of lithium membrane.
The technical scheme of the utility model is that:
a lithium film compound mechanism comprises a negative plate baseband unwinding mechanism, an upper film unwinding mechanism and a lower film unwinding mechanism which are arranged side by side, a pre-pressing roller and a compound roller which are arranged at the rear ends of the negative plate baseband unwinding mechanism, the upper film unwinding mechanism and the lower film unwinding mechanism in sequence, a lower die arranged at the rear end of the compound roller peels off a double roller, an upper die arranged at the rear end of the double roller peeled off the lower die side by side peels off the double roller and a lower die winding mechanism, and an upper die winding mechanism and a negative plate baseband winding mechanism arranged at the rear end of the double roller peeled off the upper die side.
The roller distance between the prepressing roller and the composite roller is not less than 500mm, and the roller distance between the composite roller and the lower die stripping pair roller is not less than 300 mm.
The lower die stripping double-roll and the upper die stripping double-roll are small-radius stripping double-rolls, and the roll diameter of the small-radius stripping double-rolls is not more than 10 mm.
The angle between the two tangential connecting lines is 20-30 degrees.
The angle between the two tangential connecting lines is 20-30 degrees.
And a group of tension rollers are arranged between the negative plate baseband unwinding mechanism and the prepressing roller, between the upper film unwinding mechanism and the prepressing roller, between the lower die stripping double-roller and the lower die winding mechanism, between the upper die stripping double-roller and the upper die winding mechanism, and between the upper die stripping double-roller and the negative plate baseband winding mechanism.
The winding and unwinding device comprises a negative plate base band unwinding mechanism, a set of tension rollers, a pre-pressing roller, a lower die unwinding mechanism, a set of tension rollers, a lower die winding mechanism, a set of tension rollers, a set of winding roller, a set of tension rollers, a set of tension roller, a set of winding roller, a set of tension roller, a.
The utility model has the advantages that:
the utility model is provided with the pre-pressing roller which only provides little pressure, so that the upper lithium film, the negative plate base band and the lower lithium film are tightly attached without relative sliding, the contact area of the upper lithium film, the negative plate base band and the lower lithium film is increased, the relative friction is improved, and the composite stability is improved; the roller distance between the prepressing roller and the composite roller of the utility model is not less than 500mm, thereby improving the stability before compounding and being convenient for observing the alignment degree of the lithium film in the area between the prepressing roller and the composite roller; the roll distance between the compound roller and the lower die stripping pair roller is not less than 300mm, so that sufficient friction force is ensured among the upper lithium film, the negative plate base band and the lower lithium film, and the stability during compounding is ensured; the utility model discloses a segmentation stripping structure, the angle of peeling off control is 20-30 degrees, avoids peeling off the in-process and produces disconnected area, improves the qualification rate of peeling off the back negative pole piece greatly.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a lithium film compound mechanism comprises a negative plate baseband unwinding mechanism 1, an upper film unwinding mechanism 2 and a lower film unwinding mechanism 3 which are arranged side by side, a pre-pressing roller 4 and a compound roller 5 which are arranged at the rear ends of the negative plate baseband unwinding mechanism 1, the upper film unwinding mechanism 2 and the lower film unwinding mechanism 3 in sequence, a lower film peeling double roller 6 arranged at the rear end of the compound roller 5, an upper film peeling double roller 7 and a lower film winding mechanism 8 which are arranged at the rear end of the lower film peeling double roller 6 in parallel, and an upper film winding mechanism 9 and a negative plate baseband winding mechanism 10 which are arranged at the rear end of the upper film peeling double roller 7 in parallel.
The roller distance between the prepressing roller 4 and the composite roller 5 is not less than 500mm, and the roller distance between the composite roller 5 and the lower die stripping pair roller 6 is not less than 300 mm; the lower die stripping double-roll 6 and the upper die stripping double-roll 7 both adopt small-radius stripping double-rolls, and the roll diameter of the small-radius stripping double-rolls is not more than 10 mm; a tangential connecting line between the lower die stripping double-roller 6 and the upper die stripping double-roller 7 and a tangential connecting line between the lower die stripping double-roller 6 and the input end of the lower die winding mechanism 8, wherein the included angle between the two tangential connecting lines is 25 degrees; the angle between the two tangential connecting lines is 25 degrees.
A set of tension rollers 11 are arranged between the negative plate base band unwinding mechanism 1 and the prepressing roller 4, between the upper film unwinding mechanism 2 and the prepressing roller 4, between the lower film unwinding mechanism 3 and the prepressing roller 4, between the lower film peeling pair roller 6 and the lower film winding mechanism 8, between the upper film peeling pair roller 7 and the upper film winding mechanism 9, and between the upper film peeling pair roller 7 and the negative plate base band winding mechanism 10, between the negative plate base band unwinding mechanism 1 and the input end of the corresponding set of tension rollers 11, between the output end of the corresponding set of tension rollers after the negative plate base band unwinding mechanism 1 and the prepressing roller 4, between the output end of the corresponding set of tension rollers 11 after the upper film unwinding mechanism 2 and the input end of the corresponding set of tension rollers 11, between the output end of the corresponding set of tension rollers 11 after the upper film unwinding mechanism 2 and the prepressing roller 4, between the lower film unwinding mechanism 3 and the input end of the corresponding set of tension rollers 11, The winding and unwinding deviation correcting device 12 is arranged between the lower die winding mechanism 8 and the output end corresponding to the group of tension rollers 11, between the upper winding mechanism 9 and the output end corresponding to the group of tension rollers 11, and between the pole piece base band winding mechanism 10 and the output end corresponding to the group of tension rollers 11.
The utility model discloses a theory of operation:
the negative plate base band is unreeled and output by a negative plate base band unreeling mechanism 1, the upper lithium film is unreeled and output by an upper film unreeling mechanism 2, the lower lithium film is unreeled and output by a lower film unreeling mechanism 3, then the negative plate base band, the upper lithium film and the lower lithium film are prepressed by a prepressing roller 4 to increase the contact area of the three, then the negative plate base band, the upper lithium film and the lower lithium film are compounded by a compounding roller 5, after lithium foils on the upper lithium film and the lower lithium film are transferred onto the negative plate base band, the lower lithium film is stripped by a lower die and separated by a pair roller 6 and is withdrawn by a lower die coiling mechanism 8, then the upper lithium film is stripped by an upper die and separated by a pair roller 7 and is withdrawn by an upper coiling mechanism 9, and the compounded negative plate base band is withdrawn by a negative.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A lithium film composite structure is characterized in that: the device comprises a negative plate baseband unwinding mechanism, an upper film unwinding mechanism and a lower film unwinding mechanism which are arranged side by side, a prepressing roller and a composite roller which are arranged at the rear ends of the negative plate baseband unwinding mechanism, the upper film unwinding mechanism and the lower film unwinding mechanism in sequence, a lower die stripping double roller arranged at the rear end of the composite roller, an upper die stripping double roller and a lower die winding mechanism which are arranged at the rear end of the stripping double roller of the lower die in side by side, and an upper die winding mechanism and a negative plate baseband winding mechanism which are arranged at the rear end of the stripping double roller of.
2. The lithium film composite structure according to claim 1, wherein: the roller distance between the prepressing roller and the composite roller is not less than 500mm, and the roller distance between the composite roller and the lower die stripping pair roller is not less than 300 mm.
3. The lithium film composite structure according to claim 1, wherein: the lower die stripping double-roll and the upper die stripping double-roll are small-radius stripping double-rolls, and the roll diameter of the small-radius stripping double-rolls is not more than 10 mm.
4. The lithium film composite structure according to claim 1, wherein: the angle between the two tangential connecting lines is 20-30 degrees.
5. The lithium film composite structure according to claim 1, wherein: the angle between the two tangential connecting lines is 20-30 degrees.
6. The lithium film composite structure according to claim 1, wherein: and a group of tension rollers are arranged between the negative plate baseband unwinding mechanism and the prepressing roller, between the upper film unwinding mechanism and the prepressing roller, between the lower die stripping double-roller and the lower die winding mechanism, between the upper die stripping double-roller and the upper die winding mechanism, and between the upper die stripping double-roller and the negative plate baseband winding mechanism.
7. The lithium film composite structure according to claim 6, wherein: the winding and unwinding device comprises a negative plate base band unwinding mechanism, a set of tension rollers, a pre-pressing roller, a lower die unwinding mechanism, a set of tension rollers, a lower die winding mechanism, a set of tension rollers, a set of winding roller, a set of tension rollers, a set of tension roller, a set of winding roller, a set of tension roller, a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921809340.3U CN210744071U (en) | 2019-10-25 | 2019-10-25 | Lithium film composite mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921809340.3U CN210744071U (en) | 2019-10-25 | 2019-10-25 | Lithium film composite mechanism |
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| CN210744071U true CN210744071U (en) | 2020-06-12 |
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| CN201921809340.3U Active CN210744071U (en) | 2019-10-25 | 2019-10-25 | Lithium film composite mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701253A (en) * | 2020-12-29 | 2021-04-23 | 惠州亿纬锂能股份有限公司 | Pre-lithiation composite negative plate and preparation method and application thereof |
| CN112701254A (en) * | 2020-12-29 | 2021-04-23 | 惠州亿纬锂能股份有限公司 | Lithium-sulfur soft package battery and preparation method thereof |
| CN114030929A (en) * | 2022-01-10 | 2022-02-11 | 天津中能锂业有限公司 | Pole piece strip-shaped interval pre-lithiation device |
| CN114361397A (en) * | 2022-01-10 | 2022-04-15 | 天津中能锂业有限公司 | Lithium film dual-purpose pole piece strip-shaped interval pre-lithiation method and device |
-
2019
- 2019-10-25 CN CN201921809340.3U patent/CN210744071U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701253A (en) * | 2020-12-29 | 2021-04-23 | 惠州亿纬锂能股份有限公司 | Pre-lithiation composite negative plate and preparation method and application thereof |
| CN112701254A (en) * | 2020-12-29 | 2021-04-23 | 惠州亿纬锂能股份有限公司 | Lithium-sulfur soft package battery and preparation method thereof |
| CN112701253B (en) * | 2020-12-29 | 2022-05-17 | 惠州亿纬锂能股份有限公司 | Pre-lithiation composite negative plate and preparation method and application thereof |
| CN114030929A (en) * | 2022-01-10 | 2022-02-11 | 天津中能锂业有限公司 | Pole piece strip-shaped interval pre-lithiation device |
| CN114361397A (en) * | 2022-01-10 | 2022-04-15 | 天津中能锂业有限公司 | Lithium film dual-purpose pole piece strip-shaped interval pre-lithiation method and device |
| CN114361397B (en) * | 2022-01-10 | 2023-11-10 | 天津中能锂业有限公司 | Strip-shaped interval prelithiation method and device for dual-purpose pole piece of lithium film |
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