CN210136957U - Mechanism for forming lithium film and device for supplementing lithium to pole piece - Google Patents
Mechanism for forming lithium film and device for supplementing lithium to pole piece Download PDFInfo
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- CN210136957U CN210136957U CN201921048419.9U CN201921048419U CN210136957U CN 210136957 U CN210136957 U CN 210136957U CN 201921048419 U CN201921048419 U CN 201921048419U CN 210136957 U CN210136957 U CN 210136957U
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a device that is used for the mechanism that the lithium membrane takes shape and is used for the lithium to mend by the pole piece. The mechanism for forming the lithium film comprises a rolling mechanism and a removing mechanism; the rolling mechanism is used for rolling the lithium strip into a lithium foil and enabling the lithium foil to be continuously adhered to the transfer film; the removing mechanism is used for intermittently removing the lithium foil continuously adhered to the transfer film. The device for supplementing lithium to the pole piece comprises a rolling mechanism and a pole piece providing mechanism, wherein the rolling mechanism comprises two pressing rollers; the pole piece providing mechanism is used for providing a pole piece between the two compression rollers, and the pole piece comprises a current collector and an active substance layer; the device for pole piece lithium supplement also comprises the mechanism for forming the lithium film, and the lithium foil in the lithium film formed by the mechanism for forming the lithium film is discontinuously adhered to the transfer film; the rolling mechanism is used for enabling discontinuous lithium foil in the lithium film to be separated from the transfer film and adhered to the active material layer during rolling. The device for pole piece lithium supplement can eliminate the trailing phenomenon of the white current collector area when the pole piece intermittently supplements lithium.
Description
Technical Field
The utility model relates to an electrochemistry field, more specifically relate to a device that is used for the mechanism that the lithium membrane takes shape and is used for lithium to mend to the pole piece.
Background
In recent years, with the rapid development of electric vehicles, the energy density requirement of a power battery is more and more strict, and for a negative plate, part of lithium is consumed due to the formation of a Solid Electrolyte Interface (SEI) film in the first charging process of the battery, so that the loss of lithium serving as a positive electrode material is caused, the capacity of the battery is reduced, and the first efficiency is reduced. This is particularly evident in negative electrode sheets using alloy materials (e.g., silicon alloys, tin alloys, etc.) as active materials. In order to reduce the decrease in battery capacity due to the irreversible capacity of the battery during the first charge and discharge, some solutions have been adopted.
One solution employs an apparatus for lithium replenishment of a pole piece, wherein a lithium film providing mechanism is used to provide a lithium film, the lithium film includes a transfer film and a lithium foil, the lithium foil is continuously adhered to the transfer film and faces an active material layer of the pole piece, and the pole piece includes a current collector and an active material layer discontinuously disposed on a surface of the current collector. The rolling mechanism is used for rolling the lithium film and the pole piece, and the lithium foil in the lithium film is discontinuously adhered to the active material layer. However, in the device for pole piece lithium supplement, the rolling mechanism is used for separating the continuous lithium foil in the lithium film from the transfer film, breaking and adhering to the active material layer (i.e. intermittent lithium supplement) during rolling, the lithium foil has a tailing phenomenon in the blank current collector area, so that lithium residue exists in the blank current collector area, and further, the electrode assembly (i.e. the assembly formed by the positive and negative pole pieces and the isolating film) and the battery have potential hazards in manufacturing and even safety.
SUMMERY OF THE UTILITY MODEL
In view of the problems existing in the prior art, the utility model aims to provide a device that is used for the mechanism that the lithium membrane takes shape and is used for the pole piece to mend lithium, it can eliminate the trailing phenomenon in the white current collector region when the lithium is mended to the pole piece intermittent type.
In order to achieve the above object, in a first aspect, the present invention provides a mechanism for lithium film formation, including a rolling mechanism and a removing mechanism; the rolling mechanism is used for rolling the lithium strip into a lithium foil and enabling the lithium foil to be continuously adhered to the transfer film; and the removing mechanism is arranged at the downstream of the rolling mechanism and is used for intermittently removing the lithium foil continuously adhered to the transfer film so as to form the lithium film with the lithium foil intermittently adhered to the transfer film.
In one embodiment, the rolling mechanism comprises a transfer film supply mechanism, a lithium strip supply mechanism and two rollers; the transfer film providing mechanism is used for providing the transfer film to the two rollers, the lithium strip providing mechanism is used for providing the lithium strip, the two rollers are used for rolling the lithium strip and the transfer film, so that the lithium strip is rolled into a lithium foil, and the lithium foil is continuously adhered to the transfer film to form the lithium film.
In one embodiment, the removal mechanism is a physical removal mechanism or a chemical removal mechanism.
In one embodiment, a physical removal mechanism is used to adhere the lithium foil with glue and remove the lithium foil intermittently.
In one embodiment, the removing mechanism comprises a tape dispenser, a tape tearing machine, a CCD and a computer, wherein the tape dispenser is in communication connection with the CCD and the computer, and the tape dispenser is used for storing the adhesive tape and intermittently adhering a section of the adhesive tape on the surface of a part of the lithium foil on the transfer film; the CCD is in communication connection with the adhesive tape sticking machine and the computer, and is used for positioning the positions of each section of adhesive tape and the transfer film; the computer is in communication connection with the adhesive tape sticking machine, the adhesive tape tearing machine and the CCD and is used for controlling the adhesive tape sticking time and the adhesive tape sticking time interval of each section of adhesive tape; and the tearing machine is in communication connection with the CCD and the computer and is used for tearing each adhesive tape adhered to the surface of one part of the lithium foil and the part of the lithium foil from the transfer film.
In one embodiment, a physical removal mechanism is used to intermittently remove the lithium foil using sandpaper or a grinding wheel.
In one embodiment, a chemical removal mechanism is used to employ chemicals to intermittently remove the lithium foil from the transfer film.
In one embodiment, the chemical is alcohol, acetone, or hydroxy silicone oil.
In order to achieve the above object, in a second aspect, the present invention provides a device for lithium supplement of a pole piece, wherein the pole piece comprises a current collector and an active material layer arranged on the surface of the current collector, and the device for lithium supplement of the pole piece comprises a rolling mechanism and a pole piece providing mechanism; the rolling mechanism comprises two pressing rollers; the pole piece providing mechanism is positioned at the upstream of the rolling mechanism and is used for providing pole pieces between the two rollers; the device for supplementing lithium to the pole piece further comprises a mechanism for forming the lithium film according to the first aspect of the present invention, the forming mechanism for the lithium film is located at the upstream of the rolling mechanism, and the mechanism for forming the lithium film is further used for enabling the lithium foil in the formed lithium film to correspond to the active material layer in the pole piece; the rolling mechanism is used for pressing and delaying to enable discontinuous lithium foil in the lithium film to be separated from the transfer film and to be adhered to the active material layer.
In one embodiment, the mechanism for lithium film formation is provided in one or two groups, respectively, depending on whether the active material layer is provided on one or both surfaces of the current collector.
The utility model has the advantages as follows: in the device for pole piece lithium supplement according to the utility model, the rolling mechanism is used for rolling the lithium strip into the lithium foil and continuously adhering the lithium foil on the transfer film, and the removing mechanism is used for discontinuously removing the lithium foil continuously adhered on the transfer film, thereby forming a lithium film with lithium foil intermittently adhered to the transfer film, a rolling mechanism for pressing the intermittent lithium foil in the lithium film off the transfer film and adhering to the active material layer, compared with the rolling mechanism in the prior art, the continuous lithium foil in the lithium film is separated from the transfer film, disconnected and adhered to the active material layer (namely intermittent lithium supplement) during rolling, the trailing phenomenon of the lithium foil in the blank current collector area in the prior art is eliminated, lithium residue in the blank current collector area is avoided, and further the hidden danger of the electrode assembly and the battery in manufacturing and even safety is eliminated.
Drawings
Fig. 1 is a schematic diagram of an apparatus for lithium supplement to a pole piece according to the present invention.
Fig. 2 is a schematic view of the removing mechanism of the mechanism for forming a lithium film of the device for pole piece lithium supplement of fig. 1 according to the present invention.
Wherein the reference numerals are as follows:
1 roll mechanism 322 and tear machine of gluing
11 pressure roller 323CCD
2 pole piece supply mechanism 324 computer
P0 Pole piece B adhesive tape
P01 Current collector A auxiliary film
P02 active material layer L0 lithium tape
R blank current collector region L1 lithium foil
Mechanism M lithium foil retaining section for lithium film forming
31 rolling mechanism T transfer film
311 transfer film supply mechanism E transfer film exposure section
312 lithium tape providing mechanism C lithium film
313 roller 4 transfer film take-up mechanism
314 auxiliary film supply mechanism P1 lithium supplement electrode sheet
32 get rid of 5 mechanism lithium pole pieces receiving mechanism of mending of mechanism
321 adhesive tape sticking machine
Detailed Description
The accompanying drawings illustrate embodiments of the present invention and it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms, and therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention.
Further, expressions of directions indicated for explaining operations and configurations of respective members in the embodiment, such as upper, lower, left, right, front, and rear, are not absolute but relative, and although these indications are appropriate when the respective members are in the positions shown in the drawings, when the positions are changed, the directions should be interpreted differently to correspond to the changes.
Fig. 1 is a schematic diagram of an apparatus for lithium supplement to a pole piece according to the present invention. Fig. 2 is a schematic view of the removing mechanism 32 of the mechanism 3 for forming a lithium film of the device for pole piece lithium replenishment according to the invention of fig. 1.
As shown in fig. 1, the device for lithium supplement of the pole piece comprises a rolling mechanism 1, a pole piece providing mechanism 2 and a mechanism 3 for lithium film forming. According to the actual situation, the device for supplementing lithium to the pole piece can also comprise a transfer film collecting mechanism 4. According to the actual situation, the device for pole piece lithium supplement can also comprise a lithium supplement pole piece collecting mechanism 5. The pole piece P0 includes a current collector P01 and an active material layer P02 disposed on the surface of the current collector P01. The portion of the surface of the current collector P01 where the active material layer P02 is not provided is a blank current collector region R. In other words, in fig. 1, active material layers P02 are intermittently provided on active material layers P02 on the surface of current collector P01. In fig. 1, active material layers P02 on both surfaces of current collector P01 are symmetrically distributed with respect to current collector P01, but of course, active material layers P02 on both surfaces of current collector P01 may also be asymmetrically distributed with respect to current collector P01. Of course, the active material layer P02 may be provided on only one surface of the current collector P01.
The roll pressing mechanism 1 includes two press rolls 11.
The pole piece supply mechanism 2 is located upstream of the rolling mechanism 1. The pole piece supply mechanism 2 is used to supply a pole piece P0 between two pressure rollers 11. As shown in fig. 1, the pole piece supply mechanism 2 may be a roller, so that the pole piece supply mechanism 2 is used for unwinding the pole piece P0 in the form of a roll.
The mechanism 3 for lithium film formation is located upstream of the rolling mechanism 1. The mechanism 3 for lithium film formation is used for forming the lithium film C in which the lithium foil L1 is intermittently adhered to the transfer film T, and for making the lithium foil L1 in the formed lithium film C correspond to the active material layer P0 in the pole piece P0. The rolling mechanism 1 is used for separating discontinuous lithium foil L1 in the lithium film C from the transfer film T and adhering to the active material layer P02 during rolling, so as to form a lithium supplement pole piece P1 (i.e. the pole piece P0 realizes lithium supplement).
Specifically, as shown in fig. 1, the mechanism 3 for lithium film formation includes a rolling mechanism 31 and a removing mechanism 32.
The rolling mechanism 31 is used for rolling the lithium tape L0 into a lithium foil L1 and continuously adhering the lithium foil L1 to the transfer film T.
As shown in fig. 1, the rolling mechanism 31 includes a transfer film supply mechanism 311, a lithium ribbon supply mechanism 312, and two rolling rollers 313. The rolling mechanism 31 may further include an auxiliary film supply mechanism 314 depending on the actual situation. The rolling mechanism 31 may further include an auxiliary film take-up mechanism 315, depending on the actual situation.
The transfer film supply mechanism 311 is for supplying the transfer film T to the two rollers 313. As shown in fig. 1, the transfer film supply mechanism 311 is a roller, so that the transfer film supply mechanism 311 serves to unwind the transfer film T in the form of a roll.
The lithium ribbon supply mechanism 312 is used to supply a lithium ribbon L0. As shown in fig. 1, the lithium ribbon supply mechanism 312 is a roller, so that the lithium ribbon supply mechanism 312 serves to unwind the lithium ribbon L0 in a roll form.
Two rolling rollers 313 are used to roll the lithium tape L0 and the transfer film T to roll the lithium tape L0 into a lithium foil L1 and continuously adhere the lithium foil L1 to the transfer film T to form a lithium film C.
The auxiliary film supply mechanism 314 is for supplying the auxiliary film a to the two nip rollers 313. In this case, two rolling rollers 313 are used to roll the auxiliary film a, the lithium tape L0, and the transfer film T. The adhesion between the lithium foil L1 and the transfer film T is greater than the adhesion between the lithium foil L1 and the auxiliary film a. As shown in fig. 1, the auxiliary film supply mechanism 314 is a roller, so that the auxiliary film supply mechanism 314 serves to unwind the auxiliary film a in the form of a roll.
The auxiliary film take-up mechanism 315 serves to take up the auxiliary film a passing between the two nip rollers 313. The auxiliary film take-up mechanism 315 thus serves to recover the auxiliary film a while also serving to provide a traction force to the auxiliary film a. As shown in fig. 1, the auxiliary film take-up mechanism 315 is a roller, so that the auxiliary film take-up mechanism 315 serves to take up the auxiliary film a.
Note that the auxiliary film supply mechanism 312 and the auxiliary film take-up mechanism 315 may be omitted, and in this case, it is only necessary that the adhesion between the lithium foil L1 and the transfer film T be greater than the adhesion between the lithium foil L1 and the nip roller 313 (on the side of the lithium foil L1 opposite to the transfer film T) to achieve continuous adhesion of the lithium foil L1 to the transfer film T to form the lithium film C.
The removal mechanism 32 is provided downstream of the rolling mechanism 31. The removing mechanism 32 is used to intermittently remove the lithium foil L1 continuously adhered to the transfer film T. Thus, the lithium film C in which the lithium foil L1 intermittently adheres to the transfer film T is formed to form the transfer film exposed section E and the lithium foil remaining section M alternately arranged, the transfer film exposed section E exposing the surface of a portion of the transfer film T, the lithium foil remaining section M retaining a portion of the lithium foil L1, the lithium foil remaining section M corresponding to the intermittent active material layer P02, and the transfer film exposed section E corresponding to the blank current collector region R.
In one embodiment of the removal mechanism 32, the removal mechanism 32 is a physical removal mechanism. The physical removal mechanism was used to adhere lithium foil L1 with glue and intermittently remove lithium foil L1. Further, as shown in fig. 2, the removing mechanism 32 in the form of a glue removing mechanism includes a glue applicator 321, a glue tearing machine 322, a CCD323, and a computer 324. The tape dispenser 321 is communicatively connected to the CCD323 and the computer 324, and the tape dispenser 321 serves to store the tape B and intermittently adhere a length of the tape B to the surface of a portion of the lithium foil L1 on the transfer film T. The CCD323 is communicatively connected to the adhesive tape applicator 321 and the computer 324, and the CCD323 is used to position the lengths of tape B and the transfer film T. The computer 324 is communicatively connected to the adhesive tape dispenser 321, the adhesive tape dispenser 322 and the CCD323, and the computer 324 is used for controlling the adhesive tape applying time and the adhesive tape applying time interval of each tape segment B. A tearing machine 322 is communicatively connected to the CCD323 and the computer 324, and the tearing machine 322 is used to tear each of the tapes B adhered to the surface of a portion of the lithium foil L1 together with the portion of the lithium foil L1 from the transfer film T. In another embodiment of the physical removal mechanism, the physical removal mechanism is used to remove the lithium foil intermittently using sandpaper or a grinding wheel.
In another embodiment of removal mechanism 32, removal mechanism 32 is a chemical removal mechanism. The chemical removal mechanism is used to apply a chemical to intermittently remove the lithium foil L1 from the transfer film T. The chemical substance can be alcohol, acetone, hydroxy silicone oil, etc.
The transfer film take-up mechanism 4 serves to take up the transfer film T in the lithium film C passing through the two press rollers 11 while serving to provide a traction force of the lithium film C. As shown in fig. 1, the transfer film take-up mechanism 4 is a roller, so that the transfer film take-up mechanism 4 is used to take up the transfer film T.
Lithium supplement pole piece collecting mechanism 5 is used for collecting lithium supplement pole piece P1, is used for providing the traction force of pole piece P0 simultaneously. As shown in fig. 1, the lithium supplement electrode sheet take-up mechanism 5 is a roller, so that the lithium supplement electrode sheet take-up mechanism 5 is used to take up the lithium supplement electrode sheet P1.
In the example of fig. 1, the mechanisms 3 for lithium film formation are provided in one or two groups correspondingly in accordance with the arrangement of the active material layer P02 on one or both surfaces of the current collector P01. In other words, when the active material layer P02 is provided on one surface of the current collector P01, the mechanism 3 for lithium film formation is provided as a set, and single-sided lithium supplement of the pole piece P0 is performed for one side of the pole piece P0 between the two press rollers 11 of the roll pressing mechanism 1; when the active material layer P02 is provided on both surfaces of the current collector P01, the mechanisms 3 for lithium film formation are provided in two sets as shown in fig. 1, thereby achieving double-sided lithium replenishment of the pole piece P0. Likewise, in the case of employing the transfer film take-up mechanism 4, the mechanism 3 for lithium film formation and the transfer film take-up mechanism 4 are provided in one or two sets correspondingly in accordance with the arrangement of the active material layer P02 on one or both surfaces of the current collector P01.
In the device for pole piece lithium supplement according to the present invention, the rolling mechanism 31 is used to roll the lithium strip L0 into lithium foil L1 and make the lithium foil L1 continuously adhere to the transfer film T, and the removing mechanism 32 is used to intermittently remove the lithium foil L1 continuously adhering to the transfer film T, so as to form the lithium film C with the lithium foil L1 intermittently adhering to the transfer film T, the rolling mechanism 1 is used to separate the discontinuous lithium foil L1 in the lithium film C from the transfer film T and adhere to the active material layer P02 during rolling, compared with the rolling mechanism in the background art which is used to separate the continuous lithium foil in the lithium film from the transfer film, disconnect and adhere to the active material layer (i.e. intermittent lithium supplement), the tailing phenomenon of the lithium foil in the background art in the blank current collecting region R is eliminated, so as to avoid causing blank lithium residue in the blank current collecting region R, and further eliminate the electrode assembly (i.e. pole piece and isolated battery assembly) and the battery assembly formed even in the manufacturing safety of the electrode assembly (i.e. pole piece and isolated battery) The hidden trouble of (1).
The above detailed description describes exemplary embodiments, but is not intended to limit the combinations explicitly disclosed herein. Thus, unless otherwise specified, various features disclosed herein can be combined together to form a number of additional combinations that are not shown for the sake of brevity.
Claims (10)
1. A mechanism (3) for lithium film formation, characterized in that,
the mechanism (3) for forming the lithium film comprises a rolling mechanism (31) and a removing mechanism (32);
a rolling mechanism (31) for rolling the lithium strip (L0) into a lithium foil (L1) and continuously adhering the lithium foil (L1) to the transfer film (T);
the removing mechanism (32) is arranged at the downstream of the rolling mechanism (31), and the removing mechanism (32) is used for removing the lithium foil (L1) continuously adhered to the transfer film (T) in an intermittent manner, so that a lithium film (C) formed by adhering the lithium foil (L1) to the transfer film (T) in an intermittent manner is formed.
2. Mechanism (3) for lithium film forming according to claim 1,
the rolling mechanism (31) comprises a transfer film supply mechanism (311), a lithium strip supply mechanism (312) and two rollers (313);
a transfer film supply mechanism (311) for supplying a transfer film (T) to the two rollers (313),
a lithium ribbon supply mechanism (312) for supplying a lithium ribbon (L0),
two rolling rolls (313) are used for rolling the lithium tape (L0) and the transfer film (T) so as to roll the lithium tape (L0) into a lithium foil (L1) and make the lithium foil (L1) continuously adhere to the transfer film (T) to form a lithium film (C).
3. Mechanism (3) for lithium film formation according to claim 1, characterized in that the removal mechanism (32) is a physical removal mechanism or a chemical removal mechanism.
4. Mechanism (3) for lithium film forming according to claim 3, characterized by a physical removal mechanism for attaching the lithium foil (L1) with glue and removing the lithium foil (L1) intermittently.
5. Mechanism (3) for lithium film forming according to claim 4,
the removing mechanism (32) comprises a gluing machine (321), a glue tearing machine (322), a CCD (323) and a computer (324),
a tape dispenser (321) communicatively connected to the CCD (323) and the computer (324), the tape dispenser (321) for storing the tape (B) and intermittently adhering a length of the tape (B) to a surface of a portion of the lithium foil (L1) on the transfer film (T);
the CCD (323) is connected with the adhesive tape machine (321) and the computer (324) in a communication way, the CCD (323) is used for positioning each section of adhesive tape (B) and the transfer film (T),
the computer (324) is in communication connection with the adhesive tape sticking machine (321), the adhesive tape tearing machine (322) and the CCD (323), the computer (324) is used for controlling the adhesive tape sticking time and the adhesive tape sticking time interval of each section of adhesive tape (B),
a tearing machine (322) is communicatively connected to the CCD (323) and the computer (324), the tearing machine (322) is used for tearing each adhesive tape (B) adhered on the surface of a part of the lithium foil (L1) together with the part of the lithium foil (L1) from the transfer film (T).
6. Mechanism (3) for lithium film formation according to claim 3, characterized in that the physical removal mechanism is used to remove the lithium foil (L1) intermittently with sandpaper or a grinding wheel.
7. Mechanism (3) for lithium film forming according to claim 3, characterized in that the chemical removal mechanism is used to apply a chemical substance to intermittently remove the lithium foil (L1) from the transfer film (T).
8. Mechanism (3) for lithium film forming according to claim 7, characterized in that the chemical substance is alcohol, acetone or hydroxy silicone oil.
9. A device for lithium supplement of a pole piece, the pole piece (P0) comprises a current collector (P01) and an active substance layer (P02) arranged on the surface of the current collector (P01), and comprises a rolling mechanism (1) and a pole piece providing mechanism (2),
the rolling mechanism (1) comprises two pressing rollers (11);
the pole piece providing mechanism (2) is positioned at the upstream of the rolling mechanism (1), and the pole piece providing mechanism (2) is used for providing a pole piece (P0) between the two rolling rollers (11);
characterized in that the lithium supplementing device for the pole piece further comprises a forming mechanism (3) for the lithium film according to any one of claims 1 to 8, the forming mechanism (3) for the lithium film is positioned at the upstream of the rolling mechanism (1),
the forming mechanism (3) for the lithium film is also used for enabling the lithium foil (L1) in the formed lithium film (C) to correspond to the active material layer (P02) in the pole piece (P0);
the rolling mechanism (1) is used for separating discontinuous lithium foil (L1) in the lithium film (C) from the transfer film (T) and adhering to the active material layer (P02) during pressing.
10. The device for pole piece lithium replenishment according to claim 9, characterized in that the means (3) for lithium film formation are arranged in one or two groups respectively, depending on the active substance layer (P02) arranged on one or two surfaces of the current collector (P01).
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| CN201921048419.9U CN210136957U (en) | 2019-07-05 | 2019-07-05 | Mechanism for forming lithium film and device for supplementing lithium to pole piece |
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| CN201921048419.9U CN210136957U (en) | 2019-07-05 | 2019-07-05 | Mechanism for forming lithium film and device for supplementing lithium to pole piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823760A (en) * | 2020-06-18 | 2021-12-21 | 天津中能锂业有限公司 | Ultrathin lithium strip prefabricated member, composite negative electrode, preparation method of composite negative electrode and battery |
| WO2021253318A1 (en) * | 2020-06-18 | 2021-12-23 | 天津中能锂业有限公司 | Ultrathin lithium bar preform, composite negative electrode, manufacturing method therefor, and battery |
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2019
- 2019-07-05 CN CN201921048419.9U patent/CN210136957U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823760A (en) * | 2020-06-18 | 2021-12-21 | 天津中能锂业有限公司 | Ultrathin lithium strip prefabricated member, composite negative electrode, preparation method of composite negative electrode and battery |
| WO2021253318A1 (en) * | 2020-06-18 | 2021-12-23 | 天津中能锂业有限公司 | Ultrathin lithium bar preform, composite negative electrode, manufacturing method therefor, and battery |
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