CN205828576U - Takeup type battery core - Google Patents
Takeup type battery core Download PDFInfo
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- CN205828576U CN205828576U CN201620707506.0U CN201620707506U CN205828576U CN 205828576 U CN205828576 U CN 205828576U CN 201620707506 U CN201620707506 U CN 201620707506U CN 205828576 U CN205828576 U CN 205828576U
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- initial segment
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- pole piece
- collector
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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
-
- 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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- Battery Electrode And Active Subsutance (AREA)
Abstract
This utility model provides a kind of takeup type battery core, including: the first pole piece, around the initial segment, there is blank first collector of uncoated first active material layer at the first volume；Second pole piece, has blank second collector of uncoated second active material layer at volume Two around the initial segment, and volume Two is in the first volume inner side around the initial segment through-thickness around the initial segment；Isolating membrane, keeps apart the first pole piece and the second pole piece；First lug, electrically connects with blank first collector；Second lug, electrically connects with blank second collector.In the longitudinal direction, the first volume is more than the volume Two length around the initial segment around the length of the initial segment, and the position of the first lug exceeds volume Two around the initial segment；Volume Two around the 3rd winding the initial segment of the second end of the initial segment and isolating membrane to volume Two around the inner side inflection of the initial segment through-thickness, and the volume Two after inflection is respectively positioned between the first lug and the second lug around the second end of the initial segment and the 3rd winding the initial segment of isolating membrane.
Description
Technical field
This utility model relates to field of batteries, particularly relates to a kind of takeup type battery core.
Background technology
Along with the business-like development of lithium-ion electric core, market is more and more higher to the requirement of energy density, to manufacturing process
Require harsher.
In the prior art, with reference to Fig. 1, the first volume of the first pole piece 1 is less than the second pole piece 2 around the length of the initial segment E1
Volume Two, around the length of the initial segment 2, causes isolating membrane 3 at volume Two around the inside blank coil of the initial segment 2, causes the wave of isolating membrane 3
Take and the reduction of energy density；Meanwhile, the first volume is the second pole piece 2 around the both sides of the initial segment E1, needs at the first lug 4
Both sides and the first pole piece 1 wind the both sides of initial free end and all paste gummed paper G, cause rubberizing complex process, and production efficiency is low.
Utility model content
In view of problem present in background technology, the purpose of this utility model is to provide a kind of takeup type battery core, its energy
Improve the energy density of takeup type battery core, simplify rubberizing technique, reduce the consumption of gummed paper.
To achieve these goals, this utility model provides a kind of takeup type battery core, comprising: the first pole piece, has
First collector and the first active material layer being coated on the first collection liquid surface, the first pole piece has around the initial segment at the first volume
There is blank first collector of uncoated first active material layer；Second pole piece, has the second collector and is coated in the second collection
The second active material layer in flow surface, the second pole piece has uncoated second active material layer at volume Two around the initial segment
Blank second collector, and volume Two is in the first volume inner side around the initial segment through-thickness around the initial segment；Isolating membrane, is arranged
Between the first pole piece and the second pole piece, so that the first pole piece and the second pole piece are kept apart；First lug, with blank first afflux
Body electrically connects；Second lug, electrically connects with blank second collector.
Wherein, in the longitudinal direction, the first volume is more than the volume Two length around the initial segment, and first around the length of the initial segment
The position of lug exceeds volume Two around the initial segment；Volume Two winds the initial segment around the second end of the initial segment and the 3rd of isolating membrane
To volume Two around the inner side inflection of the initial segment through-thickness, and the volume Two after inflection is around the second end of the initial segment and isolation
3rd winding the initial segment of film is respectively positioned between the first lug and the second lug.
The beneficial effects of the utility model are as follows:
According in takeup type battery core of the present utility model, due to volume Two around the initial segment less than the first volume around the initial segment
Length, so the 3rd winding the initial segment of isolating membrane is without the blank coil of long length as prior art, thus reduces isolating membrane
Usage amount, reduce cost.Further, since the volume Two after inflection winds around the second end of the initial segment and the 3rd of isolating membrane
The initial segment is respectively positioned between the first lug and the second lug, so the thickness of the 3rd winding the initial segment of isolating membrane is no longer with first
The thickness superposition of lug and the second lug, thus reduce the thickness of takeup type battery core, improve the energy density of takeup type battery core.With
Time, owing to volume Two is folded back to the volume Two inner side around the initial segment through-thickness around the second end of the initial segment, so second
The both sides of end through-thickness are the second pole piece, so the both sides of the second end through-thickness are without pasting gummed paper, subtract
Lack the consumption of gummed paper, save cost.It addition, the extension mode of the 3rd winding the initial segment of isolating membrane can realize described volume
The automated production of wound battery core.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the takeup type battery core of prior art；
Fig. 2 is the schematic diagram of the embodiment according to takeup type battery core of the present utility model, wherein the first volume around the initial segment,
Volume Two all indicates by dashed box around the initial segment, the 3rd winding the initial segment, first end and the second end；
Fig. 3 is the schematic diagram of another embodiment according to takeup type battery core of the present utility model, and wherein the first volume is around initial
Section, volume Two all indicate by dashed box around the initial segment, the 3rd winding the initial segment, first end and the second end.
Wherein, description of reference numerals is as follows:
1 first pole piece 5 second lug
The 11 first collector E1 first volumes are around the initial segment
111 blank first collector E11 first ends
12 first active material layer E2 volume Twos are around the initial segment
2 second pole piece E21 the second ends
21 second collector E3 the 3rd wind the initial segment
211 blank second collector G gummed papers
22 second active material layer L length directions
3 isolating membrane T thickness directions
4 first lugs
Detailed description of the invention
Describe takeup type battery core of the present utility model with reference to the accompanying drawings in detail.
With reference to Fig. 2 and Fig. 3, include according to takeup type battery core of the present utility model: the first pole piece 1, there is the first collector
11 have around the initial segment E1 at the first volume with the first active material layer 12 being coated on the first collector 11 surface, the first pole piece 1
There is blank first collector 111 of uncoated first active material layer 12；Second pole piece 2, has the second collector 21 and coating
The second active material layer 22 on the second collector 21 surface, the second pole piece 2 has uncoated at volume Two around the initial segment E2
Blank second collector 211 of the second active material layer 22, and volume Two is in the first volume around the initial segment E1 edge around the initial segment E2
The inner side of thickness direction T；Isolating membrane 3, is arranged between the first pole piece 1 and the second pole piece 2, with by the first pole piece 1 and the second pole
Sheet 2 is kept apart；First lug 4, electrically connects with blank first collector 111；Second lug 5, with blank second collector 211 electricity
Connect.
Wherein, in the length directionl, the first volume is more than the volume Two length around the initial segment E2 around the length of the initial segment E1,
And first around the initial segment E2, (orientation be given with reference to Fig. 2 and Fig. 3, " exceeding " refers to the first pole beyond volume Two the position of lug 4
Ear 4 at volume Two around the right side of the second end E21 L along its length of the initial segment E2)；Volume Two is around the second end of the initial segment E2
3rd winding the initial segment E3 of portion E21 and isolating membrane 3, and is returned around the inner side inflection of the initial segment E2 through-thickness T to volume Two
Volume Two after folding is respectively positioned on the first lug 4 around the second end E21 of the initial segment E2 and the 3rd winding the initial segment E3 of isolating membrane 3
With second between lug 5.
According in takeup type battery core of the present utility model, due to volume Two around the initial segment E2 less than the first volume around the initial segment
The length of E1, so the 3rd winding the initial segment E3 of isolating membrane 3 is without the blank coil of long length as prior art, thus reduces
The usage amount of isolating membrane 3, reduces cost.Further, since volume Two after inflection is around the second end E21 of the initial segment E2 and isolation
3rd winding the initial segment E3 of film 3 is respectively positioned between the first lug 4 and the second lug 5, so the 3rd winding of isolating membrane 3 is initial
The thickness no longer thickness with the first lug 4 and the second lug 5 of section E3 superposes, thus reduces the thickness of takeup type battery core, improves
The energy density of takeup type battery core.Simultaneously as volume Two is folded back to volume Two around initial around the second end E21 of the initial segment E2
The inner side of section E2 through-thickness T, so the both sides of the second end E21 through-thickness T are the second pole piece 2, so second
The both sides of end E21 through-thickness T are without pasting gummed paper G (owing to, in actual production, the second pole piece 2 is at the second end E21
Place can leave burr, and in the prior art, second pole piece 2 both sides at the second end E21 are the first pole piece 1, and burr is easy
Puncture isolating membrane 3 and contact with the first pole piece 1, and cause short circuit, so gummed paper G to be pasted), decrease the consumption of gummed paper G, joint
About cost.It addition, the extension mode of the 3rd winding the initial segment E3 of isolating membrane 3 can realize the automatic of described takeup type battery core
Metaplasia is produced.
In the embodiment according to takeup type battery core of the present utility model, with reference to Fig. 2 and Fig. 3, in the thickness directiont,
The volume Two of the second pole piece 2 is respectively equipped with one layer of isolating membrane 3 around the inner side and outer side of the initial segment E2, and two-layer isolating membrane 3 exists
On length direction L all beyond volume Two around the second end E21 of the initial segment E2；Two-layer isolating membrane 3 exceeds volume Two around the initial segment
The part of the second end E21 of E2 collectively constitute isolating membrane 3 the 3rd winding the initial segment E3, and the 3rd winding the initial segment E3 along with
Volume Two is folded back to the volume Two inner side around the initial segment E2 through-thickness T around the second end E21 of the initial segment E2.
In the embodiment according to takeup type battery core of the present utility model, with reference to Fig. 2 and Fig. 3, the second of the second pole piece 2
That winding the initial segment E2 is next-door neighbour winding center through-thickness T side and that there is the initial free end of winding one layer of second pole
Sheet 2.Volume Two is that the second pole piece 2 is folded back to volume Two around the initial segment E2 through-thickness T around the second end E21 of the initial segment E2
The part of inner side.
In the embodiment according to takeup type battery core of the present utility model, the first pole piece 1 is anode pole piece, the second pole piece
2 is cathode pole piece；Or first pole piece 1 be cathode pole piece, the second pole piece 2 is anode pole piece.Preferably, the first pole piece 1 is positive pole
Pole piece, the second pole piece 2 is cathode pole piece, and accordingly, the first active material layer 12 is positive electrode active material layer, is specifically as follows cobalt
At least one in acid lithium, LiFePO4, LiMn2O4.Second active material layer 22 is negative electrode active material layer, is specifically as follows
At least one in carbon and silicon.
In the embodiment according to takeup type battery core of the present utility model, with reference to Fig. 2 and Fig. 3, the second collector 21
With blank first collector 111 directly relative to uncoated second active material layer 22 in side.Due to blank first collector 111
Upper uncoated first active material layer 12, if with blank first collector 111 directly relative to the second collector 21 on coat
Upper second active material layer 22, not only capacity is not helped (blank first collector 111 and with blank first collector
111 directly relative to the second collector 21 between, lithium ion cannot realize come and go embed and deintercalation), on the contrary increase battery core thickness
Thus reduce battery core energy density, so the second collector 21 with blank first collector 111 directly relative to side
Two active material layers 22 can save, it is to avoid the waste of material, and improves battery core energy density.
In the embodiment according to takeup type battery core of the present utility model, with reference to Fig. 2 and Fig. 3, the first collector 11
With blank second collector 211 directly relative to uncoated first active material layer 12 in side.Due to blank second collector 211
Upper uncoated second active material layer 22, if with blank second collector 211 directly relative to the first collector 11 on coat
Upper first active material layer 12, not only capacity is not helped (blank second collector 211 and with blank second collector
211 directly relative to the first collector 11 between, lithium ion cannot realize come and go embed and deintercalation), on the contrary increase battery core thickness
Thus reduce battery core energy density, so the first collector 11 with blank second collector 211 directly relative to side
One active material layer 12 can save, it is to avoid the waste of material, and improves battery core energy density.
In the embodiment according to takeup type battery core of the present utility model, the thickness of the first lug 4 is more than blank first
The thickness of collector 111.So ensure that bonding strength and the overflow section of the first lug 4 amass.
In the embodiment according to takeup type battery core of the present utility model, the thickness of the second lug 5 is more than blank second
The thickness of collector 211.So ensure that bonding strength and the overflow section of the second lug 5 amass.
In an embodiment of the takeup type battery core according to the present invention, the first collector 11 is aluminium foil, the second collector 21
For Copper Foil.
In an embodiment of the takeup type battery core according to the present invention, the first lug 4 is fixed to blank by welding manner
First collector 111.
In an embodiment of the takeup type battery core according to the present invention, the second lug 5 is fixed to blank by welding manner
Second collector 211.
In an embodiment of the takeup type battery core according to the present invention, described in be welded as Laser Welding, ultrasonic bonding or electricity
Welding resistance.
In the embodiment according to takeup type battery core of the present utility model, the 3rd winding the initial segment E3 of isolating membrane 3
A length of 2mm～50mm, preferably 3mm～10mm.
In the embodiment according to takeup type battery core of the present utility model, with reference to Fig. 2, the second pole piece 2 and the first volume around
The first end E11 of the initial segment E1 directly relative to part post gummed paper G.Owing to, in actual production, the first pole piece 1 is first
Can leave burr at the E11 of end, and the both sides that the first pole piece 1 is at first end E11 are the second pole piece 2, burr easily punctures
Isolating membrane 3 and contact with the second pole piece 2, and cause short circuit, so gummed paper G to be pasted.Second pole piece 2 and the first volume are around the initial segment
The first end E11 of E1 directly relative to part include first end E11 both sides up and down and directly relative to circular arc portion.
In the embodiment according to takeup type battery core of the present utility model, with reference to Fig. 3, the first volume is around the of the initial segment E1
One end E11 is to the first volume around the inner side inflection of the initial segment E1 through-thickness T, and the first volume after inflection is around the initial segment E1
First end E11 is not the most overlapping around the initial segment E2 with volume Two.Owing to the first volume is around the first end of the initial segment E1
Portion E11 is folded back to the first volume inner side around the initial segment E1 through-thickness T, therefore, the first pole piece 1 at first end E11 only
Side is the most relative with the second pole piece 2, therefore only need to decrease the consumption of gummed paper G at this side glue paper G, save
Cost.
Claims (10)
1. a takeup type battery core, including:
First pole piece (1), has the first collector (11) and the first active substance being coated on the first collector (11) surface
Layer (12), the first pole piece (1) has the blank first of uncoated first active material layer (12) at the first volume around the initial segment (E1)
Collector (111)；
Second pole piece (2), has the second collector (21) and the second active substance being coated on the second collector (21) surface
Layer (22), the second pole piece (2) has the blank second of uncoated second active material layer (22) at volume Two around the initial segment (E2)
Collector (211), and volume Two is in the first volume inner side around the initial segment (E1) through-thickness (T) around the initial segment (E2)；
Isolating membrane (3), is arranged between the first pole piece (1) and the second pole piece (2), with by the first pole piece (1) and the second pole piece (2)
Keep apart；
First lug (4), electrically connects with blank first collector (111)；
Second lug (5), electrically connects with blank second collector (211)；
It is characterized in that,
On length direction (L), the first volume around the length of the initial segment (E1) more than volume Two around the length of the initial segment (E2), and the
The position of one lug (4) exceeds volume Two around the initial segment (E2)；
Volume Two winds the initial segment (E3) to volume Two around the second end (E21) of the initial segment (E2) and the 3rd of isolating membrane (3)
Around the inner side inflection of the initial segment (E2) through-thickness (T), and the volume Two after inflection is around the second end of the initial segment (E2)
(E21) and isolating membrane (3) the 3rd winding the initial segment (E3) be respectively positioned between the first lug (4) and the second lug (5).
Takeup type battery core the most according to claim 1, it is characterised in that
On thickness direction (T), the volume Two of the second pole piece (2) be respectively equipped with around the inner side and outer side of the initial segment (E2) one layer every
From film (3), and two-layer isolating membrane (3) on length direction (L) all beyond volume Two around the second end of the initial segment (E2)
(E21)；
Two-layer isolating membrane (3) collectively constitutes isolating membrane (3) beyond volume Two around the part of the second end (E21) of the initial segment (E2)
The 3rd winding the initial segment (E3), and the 3rd winding the initial segment (E3) along with volume Two is around the second end of the initial segment (E2)
(E21) volume Two inner side around the initial segment (E2) through-thickness (T) it is folded back to.
Takeup type battery core the most according to claim 1, it is characterised in that
First pole piece (1) is anode pole piece, and the second pole piece (2) is cathode pole piece；Or
First pole piece (1) is cathode pole piece, and the second pole piece (2) is anode pole piece.
Takeup type battery core the most according to claim 1, it is characterised in that the second collector (21) with blank first afflux
Body (111) directly relative to uncoated second active material layer in side (22).
Takeup type battery core the most according to claim 1, it is characterised in that the first collector (11) with blank second afflux
Body (211) directly relative to uncoated first active material layer in side (12).
Takeup type battery core the most according to claim 1, it is characterised in that the thickness of the first lug (4) is more than blank first
The thickness of collector (111), the thickness of the second lug (5) is more than the thickness of blank second collector (211).
Takeup type battery core the most according to claim 1, it is characterised in that the 3rd winding the initial segment (E3) of isolating membrane (3)
A length of 2mm～50mm.
Takeup type battery core the most according to claim 1, it is characterised in that the second pole piece (2) and the first volume are around the initial segment
(E1) first end (E11) directly relative to part post gummed paper (G).
Takeup type battery core the most according to claim 1, it is characterised in that the first volume is around the first end of the initial segment (E1)
(E11) to the first volume around the inner side inflection of the initial segment (E1) through-thickness (T), and the first volume after inflection is around the initial segment (E1)
First end (E11) upper the most not overlapping at thickness direction (T) around the initial segment (E2) with volume Two.
Takeup type battery core the most according to claim 1, it is characterised in that
First lug (4) is fixed to blank first collector (111) by welding manner；
Second lug (5) is fixed to blank second collector (211) by welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620707506.0U CN205828576U (en) | 2016-07-06 | 2016-07-06 | Takeup type battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620707506.0U CN205828576U (en) | 2016-07-06 | 2016-07-06 | Takeup type battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205828576U true CN205828576U (en) | 2016-12-21 |
Family
ID=57564349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620707506.0U Active CN205828576U (en) | 2016-07-06 | 2016-07-06 | Takeup type battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205828576U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380108A (en) * | 2018-04-12 | 2019-10-25 | 宁德新能源科技有限公司 | Battery core and electrochemical appliance with it |
| WO2021179256A1 (en) * | 2020-03-12 | 2021-09-16 | 宁德新能源科技有限公司 | Electrode assembly and battery |
| WO2022147732A1 (en) * | 2021-01-07 | 2022-07-14 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly |
-
2016
- 2016-07-06 CN CN201620707506.0U patent/CN205828576U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380108A (en) * | 2018-04-12 | 2019-10-25 | 宁德新能源科技有限公司 | Battery core and electrochemical appliance with it |
| CN110380108B (en) * | 2018-04-12 | 2021-10-08 | 宁德新能源科技有限公司 | Battery cell and electrochemical device with same |
| WO2021179256A1 (en) * | 2020-03-12 | 2021-09-16 | 宁德新能源科技有限公司 | Electrode assembly and battery |
| WO2022147732A1 (en) * | 2021-01-07 | 2022-07-14 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery, and method and device for manufacturing electrode assembly |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |