CN113422102A - Winding laminated battery and manufacturing process - Google Patents
Winding laminated battery and manufacturing process Download PDFInfo
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- CN113422102A CN113422102A CN202110814580.8A CN202110814580A CN113422102A CN 113422102 A CN113422102 A CN 113422102A CN 202110814580 A CN202110814580 A CN 202110814580A CN 113422102 A CN113422102 A CN 113422102A
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- Prior art keywords
- pole piece
- pole
- cut
- diaphragm
- die
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
Abstract
The invention belongs to the field of batteries, and particularly relates to a winding laminated battery and a manufacturing process thereof. Including aluminium-plastic film extranal packing and setting up utmost point group, utmost point ear and the electrolyte at aluminium-plastic film extranal packing inside, electrolyte is filled in aluminium-plastic film extranal packing and utmost point group's cavity of constituteing, utmost point group is formed by compound electrode and first pole piece coiling, compound electrode includes second pole piece and diaphragm, the second pole piece is the pole piece of whole strip, the second pole piece is fixed to be set up between two-layer diaphragm, first pole piece is monolithic pole piece, the fixed surface that sets up at compound electrode's one side diaphragm of first pole piece. According to the winding and laminating type battery and the manufacturing process thereof, the second pole piece adopts the whole pole piece, so that dust pollution caused by the second pole piece in the die cutting process is avoided; the second pole piece and the diaphragm are compounded to form the composite electrode, so that the problem of pole piece and diaphragm alignment in the winding process is solved, and meanwhile, the second pole piece can be provided with a plurality of guide handles, and the multiplying power performance is considered.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a winding laminated battery and a manufacturing process thereof.
Background
The new energy battery belongs to green energy, is more and more emphasized, and is rapidly developed in recent years. The commonly used battery type is a lithium battery, which has higher energy density and higher safety and is the most one used at present. The existing lithium ion battery mainly comprises a shell and a battery cell. The shell generally has cylindrical steel casing, aluminum hull and the soft package of plastic-aluminum membrane, and electric core mainly comprises positive pole piece, diaphragm, negative pole piece three, and the negative pole piece edge of cross cutting falls the powder easily, has the dust to pierce through the risk of diaphragm, causes the little short circuit of battery, and then non-compound negative pole piece can take place to remove between the diaphragm to influence the counterpoint precision of positive plate and negative pole piece.
Disclosure of Invention
In view of the above, the present invention provides a winding and stacking type battery and a manufacturing process thereof, so as to solve the above technical problems.
The utility model provides a coiling lamination formula battery, includes the plastic-aluminum membrane extranal packing and sets up utmost point group and electrolyte at the plastic-aluminum membrane extranal packing inside, electrolyte is filled in the cavity that plastic-aluminum membrane extranal packing and utmost point group constitute, utmost point group is formed by coiling of combined electrode and first pole piece, combined electrode includes second pole piece and diaphragm, the second pole piece is the pole piece of whole strip, the second pole piece is fixed to be set up between two-layer diaphragm, first pole piece is monolithic pole piece, the fixed surface that sets up at one side diaphragm of combined electrode of first pole piece.
Furthermore, the second pole piece is provided with one or more guide handles, and the guide handles and the second pole piece are integrally die-cut and formed or the guide handles are riveted or pressed on the second pole piece after being die-cut and formed separately.
Furthermore, a single guide handle is arranged on the first pole piece, and the guide handle and the first pole piece are integrally die-cut and formed or the guide handle is riveted or pressed on the first pole piece after being die-cut and formed separately.
Furthermore, the second pole piece is combined with the upper diaphragm and the lower diaphragm in a hot melting or hot pressing mode, and the first pole piece is fixed to the outer surface of the diaphragm on one side of the composite electrode in a hot pressing or bonding mode.
Furthermore, the device also comprises a tab, and the tab is connected with the guide handle in a welding mode.
Furthermore, the tab comprises a metal belt and tab glue, the tab glue is fused on the metal belt, and the metal belt is welded with the guide handle.
A manufacturing process of a winding laminated battery comprises the steps of pressing a single first pole piece on the surface of a composite electrode, winding the composite electrode with the first pole piece to a pole group towards one side of the first pole piece, accommodating the wound pole group in an aluminum plastic film outer package, welding a guide handle of the pole group and a metal strip of a pole lug together, welding a pole lug glue and the aluminum plastic film outer package together, and then injecting electrolyte to form the winding laminated battery.
Further, the composite electrode comprises a second pole piece and a diaphragm, wherein the second pole piece is arranged between the two diaphragms and is compounded with the two diaphragms.
Furthermore, the second pole piece is a whole pole piece and is provided with a single guide handle or a plurality of guide handles, and the guide handles and the second pole piece are integrally die-cut and formed or the guide handles are riveted or pressed on the second pole piece after being die-cut and formed independently.
Furthermore, a single guide handle is arranged on the first pole piece, and the guide handle and the first pole piece are integrally die-cut and formed or the guide handle is riveted or pressed on the first pole piece after being die-cut and formed separately.
Compared with the prior art, the invention has the beneficial effects that:
according to the winding and laminating type battery and the manufacturing process thereof, the second pole piece adopts the whole pole piece, so that dust pollution caused by the second pole piece in the die cutting process is avoided; the second pole piece and the diaphragm are compounded to form the composite electrode, so that the problem of pole piece and diaphragm alignment in the winding process is solved, and meanwhile, the second pole piece can be provided with a plurality of guide handles, and the multiplying power performance is considered.
Drawings
FIG. 1 is a schematic view of the structure of the pole set of the present invention.
Fig. 2 is a schematic structural diagram of the composite electrode and the first electrode plate according to the present invention.
FIG. 3 is a schematic view of the winding structure of the pole set of the present invention.
1-a first pole piece, 2-a composite electrode, 3-a second pole piece, 4-a diaphragm and 5-a guide handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to the accompanying drawings 1-3, a coiled laminated battery comprises an aluminum-plastic film outer package, a pole group and electrolyte, wherein the pole group and the electrolyte are arranged inside the aluminum-plastic film outer package, the electrolyte is filled in a cavity formed by the aluminum-plastic film outer package and the pole group, the pole group is formed by coiling a composite electrode 2 and a first pole piece 1, the composite electrode 2 comprises a second pole piece 3 and a diaphragm 4, the second pole piece 3 is a whole pole piece, the second pole piece 3 is fixedly arranged between two layers of diaphragms, the first pole piece 1 is a single pole piece, and the first pole piece 1 is fixedly arranged on the outer surface of the diaphragm on one side of the composite electrode 2.
In this embodiment, the second pole piece 3 is provided with one or more guide handles 5, the guide handles and the second pole piece 3 are integrally die-cut or individually die-cut and riveted or pressed on the second pole piece 3, the first pole piece 1 is provided with one guide handle, and the guide handles and the first pole piece 1 are integrally die-cut or individually die-cut and riveted or pressed on the first pole piece 1.
In this embodiment, the second pole piece 3 is combined with the upper and lower diaphragms in a hot melting or hot pressing manner, and the first pole piece 1 is fixed to the outer surface of the diaphragm on one side of the composite electrode 2 in a hot pressing or bonding manner.
In the embodiment, the metal strip is further provided with a tab, the tab comprises a metal strip and tab glue, the tab glue is fused on the metal strip, and the metal strip is connected with the guide handle in a welding mode.
Example 2
The invention also provides a manufacturing process of the winding laminated battery, which comprises the steps of pressing the single first pole piece 1 on the surface of the composite electrode 2, winding the composite electrode 2 with the first pole piece 1 to one side of the first pole piece to form a pole group, accommodating the wound pole group in an aluminum-plastic film outer package, welding a guide handle of the pole group and a metal strip of a pole lug together, welding the pole lug glue and the aluminum-plastic film outer package together, and injecting electrolyte to form the winding laminated battery.
In the present embodiment, the composite electrode 2 includes a second pole piece 3 and a separator 4, and the second pole piece 3 is disposed between and combined with the two separators.
In this embodiment, the second pole piece 3 is a whole pole piece, and is provided with a single guide handle or a plurality of guide handles, and the guide handles and the second pole piece are integrally die-cut or the guide handles are individually die-cut and then riveted or pressed on the second pole piece 3.
In this embodiment, a single guide handle is disposed on the first pole piece 1, and the guide handle and the first pole piece are integrally die-cut or the guide handle is riveted or pressed on the first pole piece 1 after being die-cut separately.
The invention can reduce the die cutting process of the negative pole piece, avoid dust pollution caused by die cutting of the negative pole piece, form a composite electrode, solve the problem of alignment of the pole piece and the diaphragm in the folding process, simultaneously maintain a plurality of guide handles on the second pole piece, give consideration to the multiplying power performance, and solve the problem of manufacturability in the pole piece stacking process for the negative pole materials which are difficult to die cut and transfer, such as lithium metal and the like.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.
Claims (10)
1. The utility model provides a coiling lamination formula battery, its characterized in that, includes the extranal packing of plastic-aluminum membrane and sets up utmost point group and the electrolyte at the extranal packing inside of plastic-aluminum membrane, electrolyte is filled in the extranal packing of plastic-aluminum membrane and the cavity that utmost point group constitutes, utmost point group is formed by compound electrode and first pole piece coiling, compound electrode includes second pole piece and diaphragm, the second pole piece is the pole piece of whole strip, the second pole piece is fixed to be set up between two-layer diaphragm, first pole piece is monolithic pole piece, the fixed surface that sets up at one side diaphragm of compound electrode of first pole piece.
2. The wound laminate battery of claim 1, wherein the second pole piece has one or more guide tabs disposed thereon, the guide tabs being die cut integrally with the second pole piece or separately die cut and then riveted or pressed onto the second pole piece.
3. The wound and laminated battery as claimed in claim 1, wherein the first pole piece is provided with a single guide handle, and the guide handle is integrally die-cut with the first pole piece or is separately die-cut and then riveted or pressed on the first pole piece.
4. The wound laminated battery as claimed in claim 1, wherein the second electrode plate is thermally fused or thermally compressed to combine with the upper and lower separators, and the first electrode plate is thermally compressed or bonded to the outer surface of the separator on one side of the combined electrode.
5. The wound laminated battery of claim 1, further comprising tabs welded to the stem.
6. The wound laminated battery as claimed in claim 5, wherein the tab comprises a metal strip and a tab glue, the tab glue is fused to the metal strip, and the metal strip is welded to the guide handle.
7. A manufacturing process of a winding laminated battery is characterized in that a single first pole piece is pressed on the surface of a composite electrode, the composite electrode with the first pole piece is wound into a pole group towards one side of the first pole piece, the wound pole group is accommodated in an aluminum-plastic film outer package, a guide handle of the pole group and a metal strip of a pole lug are welded together, pole lug glue and the aluminum-plastic film outer package are welded together, and then electrolyte is injected to form the winding laminated battery.
8. The process of claim 7, wherein the composite electrode comprises a second pole piece and a separator, the second pole piece is disposed between and combined with the two separators.
9. The manufacturing process of the wound and laminated battery as claimed in claim 8, wherein the second pole piece is a whole pole piece provided with a single guide handle or a plurality of guide handles, and the guide handles are integrally die-cut with the second pole piece or are separately die-cut and then riveted or pressed on the second pole piece.
10. The manufacturing process of a wound and laminated battery as claimed in claim 7, wherein the first pole piece is provided with a single guide handle, and the guide handle is integrally die-cut with the first pole piece or is riveted or pressed on the first pole piece after being die-cut separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814580.8A CN113422102A (en) | 2021-07-19 | 2021-07-19 | Winding laminated battery and manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814580.8A CN113422102A (en) | 2021-07-19 | 2021-07-19 | Winding laminated battery and manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113422102A true CN113422102A (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110814580.8A Pending CN113422102A (en) | 2021-07-19 | 2021-07-19 | Winding laminated battery and manufacturing process |
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| Country | Link |
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| CN (1) | CN113422102A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012156405A (en) * | 2011-01-27 | 2012-08-16 | Fdk Corp | Electricity storage device |
| CN105304907A (en) * | 2015-11-02 | 2016-02-03 | 多氟多（焦作）新能源科技有限公司 | Binder for lithium ion battery compound pole piece, preparation method for binder, compound pole piece, battery core, and lithium ion battery |
| CN109004260A (en) * | 2018-07-02 | 2018-12-14 | 浙江衡远新能源科技有限公司 | A kind of preparation method for cutting lamination winding type soft package lithium ion battery battery core |
| CN110429239A (en) * | 2019-06-27 | 2019-11-08 | 恒大新能源科技集团有限公司 | A kind of assemble method and pole piece stepped construction of soft package lithium ion cell polar piece |
| CN211376779U (en) * | 2019-11-28 | 2020-08-28 | 惠州亿纬创能电池有限公司 | Winding structure and lithium ion battery thereof |
-
2021
- 2021-07-19 CN CN202110814580.8A patent/CN113422102A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012156405A (en) * | 2011-01-27 | 2012-08-16 | Fdk Corp | Electricity storage device |
| CN105304907A (en) * | 2015-11-02 | 2016-02-03 | 多氟多（焦作）新能源科技有限公司 | Binder for lithium ion battery compound pole piece, preparation method for binder, compound pole piece, battery core, and lithium ion battery |
| CN109004260A (en) * | 2018-07-02 | 2018-12-14 | 浙江衡远新能源科技有限公司 | A kind of preparation method for cutting lamination winding type soft package lithium ion battery battery core |
| CN110429239A (en) * | 2019-06-27 | 2019-11-08 | 恒大新能源科技集团有限公司 | A kind of assemble method and pole piece stepped construction of soft package lithium ion cell polar piece |
| CN211376779U (en) * | 2019-11-28 | 2020-08-28 | 惠州亿纬创能电池有限公司 | Winding structure and lithium ion battery thereof |
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Application publication date: 20210921 |