CN107546404A - Takeup type battery core - Google Patents
Takeup type battery core Download PDFInfo
- Publication number
- CN107546404A CN107546404A CN201610489871.3A CN201610489871A CN107546404A CN 107546404 A CN107546404 A CN 107546404A CN 201610489871 A CN201610489871 A CN 201610489871A CN 107546404 A CN107546404 A CN 107546404A
- Authority
- CN
- China
- Prior art keywords
- collector
- battery core
- type battery
- pole piece
- takeup type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004888 barrier function Effects 0.000 claims abstract description 45
- 239000011149 active material Substances 0.000 claims abstract description 22
- 238000004804 winding Methods 0.000 claims abstract description 14
- 239000003292 glue Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 239000007774 positive electrode material Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 239000005030 aluminium foil Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000011889 copper foil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a kind of takeup type battery core, and it has two big face and two sides, including：First pole piece, the second pole piece and barrier film.First pole piece includes：First collector；And first active material layer.Second pole piece includes：Second collector；And second active material layer.At the winding ending of takeup type battery core, uncoated first active material layer and the first blank collector is defined as on positive and negative two surfaces of first collector, uncoated second active material layer and the second blank collector is defined as on positive and negative two surfaces of the second collector.The length of first blank collector is more than the length of the second blank collector.The folding part that the first blank collector is formed beyond the part of the second blank collector of first blank collector, folding part are wrapped up at least one in the two big face and two sides of takeup type battery core.For the takeup type battery core of the present invention when carrying out drift bolt test, drift bolt effect is good, improves the security that battery core uses.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of takeup type battery core.
Background technology
In the prior art, positive electrode plate and negative electrode plate of lithium ion battery is wound into battery core, due to positive/negative plate by dressing area finish up,
When carrying out drift bolt test, after draw point is pierced into the battery completely filled, the positive and negative plate instantaneous short circuit with dressing, release immediately substantial amounts of
Heat, easily catching fire.In order to improve the drift bolt performance of battery, prior art uses sets one section to lengthen sky in positive plate afterbody
Aluminium foil, set one section to lengthen empty copper foil in negative plate afterbody, and barrier film is extended, and according to empty aluminium foil-barrier film-empty copper
The order that paper tinsel-barrier film is arranged from outside to inside surrounds battery core outer ring one week, and the structure is referred to as vest (MJ) structure, so as to when outside
When sharp conductor pierces through battery, short circuit can occur rapidly for empty aluminium foil and empty copper foil, and by empty aluminium foil and anode strip (Al-Anode),
Anode strip and the shunting of the short circuit current of cathode sheets (Anode-Cathode), release the electricity inside battery core, to prevent battery from rising
Fire, so as to improve the security of battery.
But prior art still has some problems：First, the energy density of battery core is reduced, because MJ structures are not wrapped
More around the number of plies containing active material, energy density is lower, larger for surface area, particularly battery core it is relatively thin in the case of energy
Amount loss is bigger.Secondly, cost is added, because the structure includes one layer of empty copper foil, one layer of empty aluminium foil, two layers of barrier film, used
Area is big.Again, in particular cases without improvement result, because the fusing point of empty aluminium foil is relatively low, when battery core capacity is excessive, or battery core
During change in size, the fusing of sky aluminium foil can be made to cause the shunting action of MJ structures to disappear, in this case for MJ structures only
Its number of turns can be increased to improve action effect, so as to cause previous cost to improve the problem of reducing with energy density.
The content of the invention
In view of problem present in background technology, it is an object of the invention to provide a kind of takeup type battery core, which raises
The security that battery core uses, the energy density of battery core is added, reduce cost, and the drift bolt effect when being tested for drift bolt
It is good.
To achieve these goals, the invention provides a kind of takeup type battery core, it has two big face and two sides,
Including：First pole piece, the second pole piece and barrier film.
First pole piece includes：First collector；And first active material layer, it is coated on the surface of the first collector.
Second pole piece with the first pole piece electric polarity on the contrary, including：Second collector；And second active material layer, it is coated on the second collection
On the surface of fluid.Barrier film is arranged between the second pole piece and the first pole piece.
At the winding ending of takeup type battery core, uncoated first active matter on positive and negative two surfaces of the first collector
Matter layer and be defined as the first blank collector, on positive and negative two surfaces of the second collector uncoated second active material layer and
It is defined as the second blank collector.
At the winding ending of takeup type battery core, the first pole piece is in the outermost layer of takeup type battery core, the first blank afflux
The length of body is more than the length of the second blank collector.First blank collector is formed beyond the part of the second blank collector
The folding part of first blank collector, folding part are wrapped up at least one in the two big face and two sides of takeup type battery core.
Beneficial effects of the present invention are as follows：
In the takeup type battery core according to the present invention, because the first blank collector is longer than the second blank collector, and the
In the two big face and two sides of the portion envelops takeup type battery core beyond the second blank collector of one blank collector
It is at least one, so that the first blank collector more at least one layer of than being wrapped up the second blank collector at least one face more,
And then when carrying out drift bolt test, short circuit, drift bolt effect can occur rapidly for the first blank collector and the second blank collector
It is good, improve the security that battery core uses.In addition, at the winding ending of the takeup type battery core of the present invention, without by the first pole
Piece, the second pole piece and barrier film wind multi-turn simultaneously, you can realize that good drift bolt effect is good, so as to add the energy of battery core
Density, reduce cost.
Brief description of the drawings
Fig. 1 is the winding schematic diagram according to takeup type battery core of the invention in one embodiment；
Fig. 2 is the winding schematic diagram according to takeup type battery core of the invention in another embodiment；
Fig. 3 is the winding schematic diagram according to takeup type battery core of the invention in another embodiment；
Fig. 4 is the winding schematic diagram in another embodiment according to the takeup type battery core of the present invention.
Wherein, description of reference numerals is as follows：
1 first pole piece S2 the second blank collectors
The ending end of 11 first the second pole pieces of collector E0
The barrier film of 12 first active material layer 3
31 first barrier films of the first blank of S1 collector
The ending end of first barrier film of S11 folding parts E1
The Article 2 barrier film of S111 folding lines 32
The ending end of 2 second pole piece E2 Article 2 barrier films
The fixing glue of 21 second collector 4
22 second active material layers
Embodiment
With reference to the accompanying drawings come describe in detail according to the present invention takeup type battery core.
Referring to figs. 1 to Fig. 4, two big face and two sides are had according to the takeup type battery core of the present invention, including：First pole
Piece 1, the second pole piece 2 and barrier film 3.
First pole piece 1 includes：First collector 11；And first active material layer 12, it is coated on the first collector 11
On surface.Second pole piece 2 with the electric polarity of the first pole piece 1 on the contrary, including：Second collector 21；And second active material layer 22,
It is coated on the surface of the second collector 11.Barrier film 3 is arranged between the second pole piece 2 and the first pole piece 1.
At the winding ending of takeup type battery core, uncoated first activity on positive and negative two surfaces of the first collector 11
Material layer 12 and the first blank collector S1 is defined as, uncoated second activity on positive and negative two surfaces of the second collector 21
Material layer and it is defined as the second blank collector S2.
Wherein, at the winding ending of takeup type battery core, the first pole piece 1 is in the outermost layer of takeup type battery core, and first is empty
White collector S1 length is more than the second blank collector S2 length.First blank collector S1's exceeds the second blank afflux
Body S2 part forms the first blank collector S1 folding part S11, the two big face of folding part S11 parcel takeup type battery cores with
It is at least one in two sides.In the takeup type battery core according to the present invention, because the first blank collector S1 is more empty than second
White collector S2 length, and the two of the first blank collector S1 portion envelops takeup type battery core beyond the second blank collector S2
It is at least one in individual big face and two sides, so that the first blank collector S1 second blank of ratio at least one face
Collector S2 wraps up at least one layer more, and then when carrying out drift bolt test, the first blank collector S1 and the second blank collector
Short circuit can occur rapidly for S2, and drift bolt effect is good, improve the security that battery core uses.In addition, in the takeup type electricity of the present invention
At the winding ending of core, good wear can be achieved without the first pole piece 1, the second pole piece 2 and barrier film 3 to be wound to multi-turn simultaneously
It is good to follow closely effect, so as to add the energy density of battery core, reduces cost.
According to the takeup type battery core of the present invention, in one embodiment, referring to figs. 1 to Fig. 4, barrier film 3 includes：First every
From film 31；And Article 2 barrier film 32.
In one embodiment, first barrier film 31 and Article 2 barrier film 32 can be interconnected together as one.
In one embodiment, first barrier film 31 and Article 2 barrier film 32 can be two separated.
In one embodiment, the first pole piece 1 is anode pole piece and the second pole piece 2 is cathode pole piece, and the first collector 11 is
Plus plate current-collecting body and the second collector 21 is negative current collector, the first active material layer 12 be positive electrode active material layer and second live
Property material layer 22 is negative electrode active material layer.Or first pole piece 1 be cathode pole piece and the second pole piece 2 is anode pole piece, first
Collector 11 is negative current collector and the second collector 21 is plus plate current-collecting body, and the first active material layer 12 is negative electrode active material
Layer and the second active material layer 22 is positive electrode active material layer.
In one embodiment, referring to figs. 1 to Fig. 4, the ending end E0 of the second pole piece is no more than the receipts of first barrier film
Tail end E1 and Article 2 barrier film ending end E2.The purpose so wound is the ending end in order to avoid the second pole piece
E0, so as to prevent that both positive and negative polarity is short-circuit, contributes to protection to wind outside first barrier film 31 and Article 2 barrier film 32
Formula battery core it is safe to use.
In one embodiment, reference picture 1, the first blank collector S1's rolls up beyond the second blank collector S2 part edge
The the first blank collector S1 folding part S11 with folding line S111 is bent to form around direction, and a folding part S11 part is stretched
Enter between first pole piece 1 of barrier film 31 and first to wrap up at least one big face of takeup type battery core.
In one embodiment, the folding part S11 part stretched between first pole piece 1 of barrier film 3 and first is no more than
End at second blank collector S2 remote folding line S111, so as to not influence takeup type electricity while drift bolt effect is ensured
The energy density of core.
In one embodiment, the ending end E1 of first barrier film is no more than the ending end E2 of Article 2 barrier film,
Or the ending end E2 of Article 2 barrier film is no more than the ending end E1 of first barrier film.Remark additionally herein,
The length of the length of first barrier film 31 and Article 2 barrier film 32 not etc. is fixed for the ease of follow-up rubberizing.
In one embodiment, the first blank collector S1 beyond the second blank collector S2 part along coiling direction
The the first blank collector S1 folding part S11 with folding line S111 is reversely bent to form, and folding part S11 is located at takeup type electricity
The surface of core.
In one embodiment, reference picture 2 and Fig. 4, folding part S11 wrap up one of them big face of takeup type battery core.
In one embodiment, folding part S11 wraps up two big faces of takeup type battery core.
In one embodiment, reference picture 3, folding part S11 wrap up the two big face and two sides of takeup type battery core, so as to
The comprehensive parcel of takeup type battery core is realized, strengthens the adaptability of the drift bolt test to different faces.
In one embodiment, folding part S11 folding line S111 can be one or more.
In one embodiment, reference picture 4, when folding part S11 folding line S111 is two or more, folding part S11 shape
Shape is " Z " shape, now can greatly strengthen the surface of takeup type battery core residing for two or more folding line S111 (in Fig. 4
For the big face in top) thermal diffusivity of folding part S11 in drift bolt, while increase folding part S11 thickness and intensity, drop
The disconnected risk of eutectic, improve the reliability of drift bolt test.
In one embodiment, there is fixing glue 4 referring to figs. 1 to Fig. 4, folding part S11 end Pasting.Add herein
Bright, it is for fixed fold portion S11 end to paste fixing glue 4.And in Fig. 1, fixing glue 4, which can also play, to be prevented from rolling over
Folded portion S11 pierces through the purpose of first barrier film 31, in order to reach this purpose, also fixing glue 4 can be pasted onto into folding part S11
End corresponding to first barrier film 31 surface on.
In one embodiment, referring to figs. 1 to Fig. 4, Pasting has fixing glue 4 at folding part S11 folding line S111.Herein
Supplementary notes, it is in order to fix folding line S111, and in first barrier film that fixing glue 4 is pasted with the outside of folding line S111
It is to prevent folding line S111 from directly being connect with the second blank collector S2 that fixing glue 4 is pasted between 31 and Article 2 barrier film 32
Touch.In Fig. 1, fixing glue 4 can be also pasted onto to folding line S111 inner side, can equally play prevents that folding line S111 and second is empty
The purpose of white collector S2 contacts.
In one embodiment, fixing glue 4 can be green glue.
In one embodiment, the material of barrier film 3 can be polypropylene or polyethylene.
In one embodiment, plus plate current-collecting body can be aluminium foil, and negative current collector can be copper foil.
In one embodiment, the negative electrode active material in negative electrode active material layer may be selected from Delanium, native graphite, nothing
One or more in carbon, the hard charcoal of shaping.
In one embodiment, the positive active material in the active material layer of positive pole pole may be selected from cobalt acid lithium, LiMn2O4, ternary
One or more in material, LiFePO 4.
Claims (10)
1. a kind of takeup type battery core, there are two big face and two sides, including；
First pole piece (1), including：
First collector (11)；And
First active material layer (12), is coated on the surface of the first collector (11)；
Second pole piece (2), with the first pole piece (1) electric polarity on the contrary, including：
Second collector (21)；And
Second active material layer (22), is coated on the surface of the second collector (11)；
Barrier film (3), it is arranged between the second pole piece (2) and the first pole piece (1)；
At the winding ending of takeup type battery core, uncoated first active matter on positive and negative two surfaces of the first collector (11)
Matter layer (12) and be defined as the first blank collector (S1), on positive and negative two surfaces of the second collector (21) uncoated and
Active material layer and it is defined as the second blank collector (S2)；
Characterized in that,
At the winding ending of takeup type battery core, the first pole piece (1) is in the outermost layer of takeup type battery core, the first blank collector
(S1) length is more than the length of the second blank collector (S2)；
First blank collector (S1) forms the first blank collector (S1) beyond the part of the second blank collector (S2)
Folding part (S11), folding part (S11) wrap up at least one in the two big face and two sides of takeup type battery core.
2. takeup type battery core according to claim 1, it is characterised in that barrier film (3) includes：
First barrier film (31)；And
Article 2 barrier film (32).
3. takeup type battery core according to claim 1, it is characterised in that the first pole piece (1) second pole for anode pole piece
Piece (2) is cathode pole piece, and the first collector (11) is plus plate current-collecting body and the second collector (21) is negative current collector, and first lives
Property material layer (12) is positive electrode active material layer and the second active material layer (22) is negative electrode active material layer；Or
First pole piece (1) is cathode pole piece and the second pole piece (2) is anode pole piece, the first collector (11) be negative current collector and
Second collector (21) is plus plate current-collecting body, and the first active material layer (12) is negative electrode active material layer and the second active material layer
(22) it is positive electrode active material layer.
4. takeup type battery core according to claim 2, it is characterised in that
The ending end (E0) of second pole piece is no more than the ending end (E1) of first barrier film and the receipts of Article 2 barrier film
Tail end (E2).
5. takeup type battery core according to claim 4, it is characterised in that the first blank collector (S1) exceeds the second sky
The part of white collector (S2) is bent to form the folding with folding line (S111) of the first blank collector (S1) along coiling direction
Portion (S11), and the part of folding part (S11) is stretched between first barrier film (31) and the first pole piece (1) to wrap up winding
At least one big face of formula battery core.
6. takeup type battery core according to claim 5, it is characterised in that folding part (S11's) stretches into first barrier film
(3) part between the first pole piece (1) is no more than the end at remote folding line (S111) place of the second blank collector (S2).
7. takeup type battery core according to claim 4, it is characterised in that the first blank collector (S1) exceeds the second sky
The part of white collector (S2) along coiling direction be reversely bent to form the first blank collector (S1) there is folding line (S111)
Folding part (S11), and folding part (S11) is located at the surface of takeup type battery core.
8. takeup type battery core according to claim 7, it is characterised in that
Wrap up one of them big face of takeup type battery core in folding part (S11)；Or
Wrap up two big faces of takeup type battery core in folding part (S11).
9. takeup type battery core according to claim 7, it is characterised in that the folding line (S111) of folding part (S11) is one
It is or multiple.
10. according to the takeup type battery core described in claim 2, it is characterised in that
The end of folding part (S11) is pasted with fixing glue (4)；
Folding line (S111) place of folding part (S11) is pasted with fixing glue (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489871.3A CN107546404B (en) | 2016-06-28 | 2016-06-28 | Winding type battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489871.3A CN107546404B (en) | 2016-06-28 | 2016-06-28 | Winding type battery cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107546404A true CN107546404A (en) | 2018-01-05 |
| CN107546404B CN107546404B (en) | 2024-04-05 |
Family
ID=60962947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610489871.3A Active CN107546404B (en) | 2016-06-28 | 2016-06-28 | Winding type battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107546404B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987794A (en) * | 2018-07-17 | 2018-12-11 | 惠州市豪鹏科技有限公司 | A kind of Soft Roll formula lithium ion battery and drift bolt test method |
| WO2019200538A1 (en) * | 2018-04-17 | 2019-10-24 | 宁德新能源科技有限公司 | Battery cell and battery |
| CN110474104A (en) * | 2018-05-09 | 2019-11-19 | 郑州宇通集团有限公司 | A kind of takeup type battery core and the battery using the takeup type battery core |
| CN114447342A (en) * | 2022-04-08 | 2022-05-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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| JP2007059387A (en) * | 2005-07-28 | 2007-03-08 | Matsushita Electric Ind Co Ltd | Electrode for lithium ion secondary battery |
| CN1988240A (en) * | 2005-12-23 | 2007-06-27 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and its preparing method |
| CN203733899U (en) * | 2013-11-28 | 2014-07-23 | 东莞新能源科技有限公司 | Wound-type lithium ion cell |
| CN105703010A (en) * | 2014-11-28 | 2016-06-22 | 宁德时代新能源科技股份有限公司 | Electrode slice and electrochemical energy storage device |
| CN205828575U (en) * | 2016-06-28 | 2016-12-21 | 宁德新能源科技有限公司 | Takeup type battery core |
-
2016
- 2016-06-28 CN CN201610489871.3A patent/CN107546404B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007059387A (en) * | 2005-07-28 | 2007-03-08 | Matsushita Electric Ind Co Ltd | Electrode for lithium ion secondary battery |
| CN1988240A (en) * | 2005-12-23 | 2007-06-27 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and its preparing method |
| CN203733899U (en) * | 2013-11-28 | 2014-07-23 | 东莞新能源科技有限公司 | Wound-type lithium ion cell |
| CN105703010A (en) * | 2014-11-28 | 2016-06-22 | 宁德时代新能源科技股份有限公司 | Electrode slice and electrochemical energy storage device |
| CN205828575U (en) * | 2016-06-28 | 2016-12-21 | 宁德新能源科技有限公司 | Takeup type battery core |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019200538A1 (en) * | 2018-04-17 | 2019-10-24 | 宁德新能源科技有限公司 | Battery cell and battery |
| CN110474104A (en) * | 2018-05-09 | 2019-11-19 | 郑州宇通集团有限公司 | A kind of takeup type battery core and the battery using the takeup type battery core |
| CN108987794A (en) * | 2018-07-17 | 2018-12-11 | 惠州市豪鹏科技有限公司 | A kind of Soft Roll formula lithium ion battery and drift bolt test method |
| CN114447342A (en) * | 2022-04-08 | 2022-05-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107546404B (en) | 2024-04-05 |
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