CN205355181U - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- CN205355181U CN205355181U CN201620146682.1U CN201620146682U CN205355181U CN 205355181 U CN205355181 U CN 205355181U CN 201620146682 U CN201620146682 U CN 201620146682U CN 205355181 U CN205355181 U CN 205355181U
- Authority
- CN
- China
- Prior art keywords
- groove
- negative
- active material
- material layer
- pole piece
- 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.)
- Active
Links
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
- Battery Electrode And Active Subsutance (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a secondary battery includes the platykurtic electricity core of being convoluteed and being formed by anodal pole piece, negative pole pole piece and diaphragm, and anodal pole piece includes the anodal mass flow body and attached to the positive active material layer of anodal mass flow body surface face, and the negative pole pole piece includes negative current collector and attached to the negative active material layer on negative current collector surface, first recess is located the negative active material layer of electric core both ends pars convoluta, and negative pole utmost point ear is inlayed in first recess, the second recess is located the positive active material layer of electric core both ends pars convoluta, and anodal utmost point ear is inlayed in the second recess. This application sets up utmost point ear on the pars convoluta at the both ends of platykurtic pole piece, improves the circulation greatly and fills the deformation among the the discharge process, reduces direct current impedance DCR, be used for the inlaid recess of utmost point ear through offering on positive negative pole pole piece, reduce the stack to electric core thickness, further promote capacity density.
Description
Technical field
The application relates to energy-storage travelling wave tube field, specifically, relates to a kind of secondary cell.
Background technology
Lithium rechargeable battery is widely used in movement, portable electronics because of advantages such as energy density are high, average open-circuit voltage is high and has extended cycle life.The pole piece of commercial lithium rechargeable battery comprises collector, lug and active material layer, and wherein active material layer is the coating of continuous uniform.Both positive and negative polarity pole piece forms battery core together with barrier film, the thickness of battery core by the thickness of both positive and negative polarity pole piece, the thickness of barrier film, lug thickness jointly cumulative form.At the different parts of battery core, thickness also differs, wherein maximum at the thickness at soldering polar ear place.The generally individually maximum gauge with battery of commercial lithium ion battery defines the thickness of this size battery.
Along with electronic product is to miniaturization, multifunction development, the energy density of lithium rechargeable battery is required also more and more higher by it, and this just requires that more capacity to be contributed by battery in same space.And the thickness of traditional lithium rechargeable battery adding up due to lug thickness, make the maximum gauge that thickness is battery in soldering polar ear region, the area thickness of non-soldering polar ear is then relatively small, this segment space can not be fully utilized, cause that, in certain gauge size, the capacity of battery is difficult to further raising.Cell thickness cumulative is had become as one of bottleneck that restriction conventional lithium ion battery energy density promotes further by the thickness of lug.
In order to solve drawbacks described above, Chinese patent literature CN203733894U adopts and arranges lug pockets on the diaphragm of pole piece, lug is arranged at the mode in groove, to reduce the lug superposition to battery core thickness.But, owing to lug is placed in the thickness direction of battery core, therefore in cycle charge discharge electric process there is bigger " u "-shaped or serpentine deformation in battery core.
For drawbacks described above, special proposition the application.
Summary of the invention
Present invention purpose is in that to propose a kind of secondary cell, can improve the deformation in cycle charge discharge electric process.
In order to complete the purpose of the application, the technical scheme of employing is:
A kind of secondary cell, including by anode pole piece, cathode pole piece, the flat battery core of membrane winding that is arranged between described anode pole piece and described cathode pole piece, described anode pole piece includes plus plate current-collecting body and is attached to the positive electrode active material layer of anode collection surface, and described cathode pole piece includes negative current collector and is attached to the negative electrode active material layer of negative pole currect collecting surface；Being provided with the first groove on described negative electrode active material layer, negative lug is embedded in described first groove and electrically connects with negative current collector；Being provided with the second groove on positive electrode active material layer, positive pole ear is embedded in the second groove and electrically connects with plus plate current-collecting body；Described battery core includes the pars convoluta at battery core two ends, and described first groove is positioned on the negative electrode active material layer of pars convoluta, and described second groove is positioned on the positive electrode active material layer of pars convoluta.
Preferably, described first groove is positioned at the pars convoluta of described battery core one end, and described second groove is positioned at the pars convoluta of the described battery core other end.
Preferably, the position set by described first groove and described second groove is symmetrical arranged with the axis of symmetry of the length direction of described battery core or is symmetrical arranged with the axis of symmetry of the thickness direction of described battery core or is centrosymmetric with the center of described battery core.
Preferably, the negative electrode active material layer of described cathode pole piece is provided with multiple first groove, all it is inlaid with negative lug in each first groove, the positive electrode active material layer of described anode pole piece is provided with multiple second groove, in each second groove, is all inlaid with positive pole ear.
Preferably, the width of positive pole ear is 1～100 times of positive pole ear thickness, and the width of negative lug is 1～100 times of negative lug thickness.
Preferably, described positive pole ear is arc, and the radian of described arc is consistent with the radian in the site that is connected with positive pole ear on described pars convoluta；Described negative lug is arc, and the radian of described arc is consistent with the radian in the site that is connected with negative lug on described pars convoluta.
Preferably, the thickness of described negative lug is less than or equal to the degree of depth of described first groove, and the thickness of described positive pole ear is less than or equal to the degree of depth of described second groove.
Preferably, also including glue-line in described battery core, described glue-line is arranged on described negative lug surface and covers whole first groove and/or be arranged on positive pole ear surface and cover whole second groove.
Preferably, the upper and lower surface of described negative current collector all adheres to negative electrode active material layer, and the negative electrode active material layer of the opposite side corresponding with the first groove location is provided with negative pole para-position groove.
Preferably, the upper and lower surface of described plus plate current-collecting body all adheres to positive electrode active material layer, and the positive electrode active material layer of the opposite side corresponding with the second groove location is provided with positive pole para-position groove.
The technical scheme that the application provides can reach following beneficial effect:
Lug is arranged on the pars convoluta at the two ends of flat battery core by the application, it is arranged at compared with the thickness direction of battery core with lug, it is substantially improved the deformation in cycle charge discharge electric process, reduces deformation thickness, also can reduce D.C. resistance DCR (Directcurrentresistance).Owing to lug is arranged on active material layer in the groove arranged by the application, the capacity density of battery core can be promoted.
Accompanying drawing explanation
Fig. 1 is the battery core cross sectional representation in a certain detailed description of the invention of the application；
Fig. 2 is Tu1Zhong negative lug district partial enlarged view；
Fig. 3 is Tu1Zhong positive pole ear district partial enlarged view；
Fig. 4 is battery core cross sectional representation in comparative example 1；
Fig. 5 is the battery core cross sectional representation in comparative example 2；
Fig. 6 is the battery core cross sectional representation in the application；
Wherein:
1-cathode pole piece；
11-negative current collector；
12-negative electrode active material layer；
G11-the first groove；
2-negative lug；
3-anode pole piece；
31-plus plate current-collecting body；
32-positive electrode active material layer；
G31-the second groove；
4-positive pole ear；
5-barrier film；
6-pars convoluta；
The straight portion of 7-.
Detailed description of the invention
Below by specific embodiment and in conjunction with accompanying drawing, the application is described in further detail."front", "rear" described in literary composition, "left", "right", " on ", D score is all with the laying state of the battery core in accompanying drawing for reference.
As shown in Figure 1, including by anode pole piece 3, cathode pole piece 1, be arranged between described anode pole piece and described cathode pole piece barrier film 5 winding flat battery core, flat battery core is formed by the pars convoluta 6 at battery core two ends and the straight portion 7 between the pars convoluta at two ends.As shown in Figure 6, the part of the inflection at electric wire two ends constitutes the pars convoluta of battery core, and the part between pars convoluta is straight portion；Parallel with the straight portion of battery core, be the length direction of battery core from the pars convoluta of one end to the direction of other end pars convoluta, specifically direction as shown in OA or AO；The thickness direction that vertical direction is battery core in the straight portion of battery core, specifically direction as shown in OB or BO.
Cathode pole piece 1 includes negative current collector 11 and is attached to the negative electrode active material layer 12 on negative current collector 11 surface, the negative electrode active material layer 12 of cathode pole piece 1 is provided with the first groove G11, first groove G11 is positioned on the negative electrode active material layer 12 of pars convoluta, and negative lug 2 is embedded in the first groove G11 and electrically connects with negative current collector 11；
Anode pole piece 3 includes plus plate current-collecting body 31 and is attached to the positive electrode active material layer 32 on plus plate current-collecting body 31 surface, the positive electrode active material layer 32 of anode pole piece 3 is provided with the second groove G31, second groove G31 is positioned on the positive electrode active material layer of pars convoluta 32, and positive pole ear 4 is embedded in the second groove G31 and electrically connects with plus plate current-collecting body 11.
The first groove G11 of the application is positioned at the pars convoluta of battery core one end, and the second groove G31 is positioned at the pars convoluta of the battery core other end, and the first groove G11 and the second groove G31 is symmetrical arranged along the axis of symmetry of the length direction of flat battery core.The axis of symmetry of length direction be parallel with direction, battery core straight portion, by the axle being divided into upper and lower two parts symmetrical for battery core.
In the still another embodiment of the application, the position of the first groove G11 and the second groove G31 is symmetrical arranged with the axis of symmetry of the thickness direction of battery core, the axis of symmetry of thickness direction be vertical with direction, battery core straight portion, by the axle being divided into two parts in left and right symmetrical for battery core；Can be located at the position on the upper side of left end pars convoluta with i.e. the first groove G11, the second groove G31 can be located at the position on the upper side of right-hand member pars convoluta.
In the still another embodiment of the application, the center with battery core of the first groove G11 and the second groove G31 is centrosymmetric；Namely the first groove G11 can be located at the position on the upper side of left end pars convoluta, and the second groove G31 can be located at the position on the lower side of right-hand member pars convoluta, as long as positive pole ear and negative lug are centrosymmetric, so that it may reaches to improve the effect of deformation in cycle charge discharge electric process.And preferably close proximity to the position of the axis of symmetry on battery core length direction, because the closer to the axis of symmetry on battery core length direction, its caused deformation is more little, is more conducive to Reducing distortion thickness.
The lug of the application battery core is positioned at the pars convoluta at the two ends of flat pole piece, can be effectively improved the deformation in battery cycle charge-discharge process, as " U " or serpentine deform, reduces D.C. resistance hoist capacity density.
Preferably, the negative electrode active material layer of cathode pole piece 1 is provided with multiple first groove G11, all it is inlaid with negative lug 2 in each first groove G11, the positive electrode active material layer of anode pole piece 3 is provided with multiple second groove G31, in each second groove G31, is all inlaid with positive pole ear 4.The advantage being provided with multiple lug is: at the high-multiplying power discharge initial stage, it is less that inside battery just has the internal resistance of multiple regions, and electric current density is relatively big, and response speed is very fast, thus the vigorous reaction alleviated in monopole ear situation.
In the application, the width of positive pole ear 4 is 1～100 times of positive pole ear 4 thickness, and the width of negative lug 2 is 1～100 times of negative lug 2 thickness, and difference preferably 1～50 times.In order to make lug better contact with the collector of the bending at two ends, reducing the width of lug as much as possible, width can be 0.1～10 millimeter, it is preferable that 1～5 millimeter.Under limit state, lug can be designed as thread.Each thread lug is connected on same layer collector, or on the collector of different layers.
In order to adapt to the installation site of lug in the application, lug can be designed as abnormity lug.In the application, positive pole ear 4 and negative lug 2 are arc, and the radian of arc is consistent with the radian in the site that is connected with positive pole ear or negative lug on described pars convoluta.So that more fitting between lug and pole piece.
The thickness of negative lug 2 degree of depth less than or equal to the first groove G11 in the application, the thickness of positive pole ear 4 degree of depth less than or equal to described second groove G31.Thus positive pole ear 2 and negative lug 4 are respectively welded after groove, battery will not be produced the superposition of thickness, can further improve the energy density of battery.
Preferably, also including glue-line in battery core, glue-line is arranged on negative lug surface and covers whole first groove G11 and/or be arranged on positive pole ear surface and cover whole second groove G31.
Preferably, the upper and lower surface of negative current collector 11 all adheres to negative electrode active material layer 12, and the negative electrode active material layer of the opposite side corresponding with the first groove G11 position is provided with negative pole para-position groove.
Preferably, the upper and lower surface of plus plate current-collecting body 31 all adheres to positive electrode active material layer 32, and the positive electrode active material layer of the opposite side corresponding with the second groove G31 position is provided with positive pole para-position groove.
The purpose that negative pole para-position groove and positive pole para-position groove are arranged is more convenient soldering polar ear.
Groove in the application can pass through to remove active material layer and be formed to expose collection liquid surface, and can pass through laser cleaning, mechanical cleaning, foamed glue cleaning or the realization of occupy-place method.
Embodiment 1
Adopt the structure shown in Fig. 1, for 494090 model flexible packing lithium ion batteries (resultant battery thickness be 4.9mm, width be that 40mm, length are for 90mm), negative lug 2 and positive pole ear 4 consistent size, namely the weld length of lug is 15mm, and lug width is 6mm, thickness is 0.06mm.
Cathode pole piece 1 includes negative current collector 11 and is attached to the negative electrode active material layer 12 of negative pole currect collecting surface, the negative electrode active material layer of cathode pole piece is provided with the first groove G11, first groove is positioned on the negative electrode active material layer of pars convoluta, and negative lug 2 is embedded in the first groove and electrically connects with negative current collector；Negative electrode active material layer material is graphite.
Anode pole piece 3 includes plus plate current-collecting body 31 and is attached to the positive electrode active material layer 32 of anode collection surface, the positive electrode active material layer of anode pole piece is provided with the second groove G31, second groove is positioned on the positive electrode active material layer of pars convoluta, positive pole ear is embedded in the second groove and electrically connects with plus plate current-collecting body, and positive electrode active material layer material is cobalt acid lithium.
Adopt the structure shown in Fig. 1, the pole piece after cold pressing process, adopt laser to wash out the first groove G11 for welding negative lug 2 respectively on cathode pole piece 1.
Laser is adopted to wash out the second groove G31 for welding positive pole ear 4 on anode pole piece 3.
Cathode pole piece 1, barrier film 5 and anode pole piece 3 wind after stacking gradually in the same direction, are consequently formed the battery core of secondary cell, and the first groove G11 is positioned at the pars convoluta of battery core one end, and the second groove G31 is positioned at the pars convoluta of the battery core other end.
Comparative example 1
As shown in Figure 4, with the difference of embodiment 1: negative lug 2 and positive pole ear 4 lay respectively in the groove position offered on cell thickness direction.All the other perform step as identical in embodiment 1.
Comparative example 2
As shown in Figure 5, difference with embodiment 1: anode pole piece and do not offer groove on cathode pole piece, and the head of anode pole piece and cathode pole piece is respectively provided with blank collector 11 and 31, negative lug 2 and positive pole ear 4 are respectively welded on the blank collector 11 and 31 of pole piece head, and negative lug 2 and positive pole ear 4 lay respectively on cell thickness direction.All the other perform step as identical in embodiment 1.
The battery of embodiment 1 and comparative example 1-2 gained is carried out volume test, thickness direct current, resistance (DCR) and 1000cycles deformation measurement.
Volume test: adopt nominal current that battery core is charged to nominal upper limit voltage, then discharge into, with nominal current, the electricity discharged by voltage again.
Thickness measuring: measure with PPG calibrator.
D.C. resistance DCR measures: first adopts 0.1C electric discharge 10s, then adopts 1C electric discharge 1s, this voltage difference of two sections/difference between current calculates and obtain.
1000cycles deformation measurement: measure the thickness change before and after 1000 charge and discharge cycles with PPG calibrator, thickness changing ratio calculate and obtain.
The test result of gained is shown in table 1, by statistics in table it can be seen that average size and the average volume energy density of embodiment all have a distinct increment than comparative example；DCR is also relatively small.
Table 1: embodiment 1 and the capacity of comparative example 1-2 battery, volume energy density and cell thickness
Can be seen that, lug is arranged at flat battery core two ends pars convoluta on (i.e. embodiment 1), it is arranged at compared with the thickness direction (i.e. comparative example 1) of battery core with lug, it is substantially improved the deformation in cycle charge discharge electric process, reduce deformation thickness, also can reduce D.C. resistance DCR.Owing to lug is arranged on active material layer in the groove arranged by the application, compared to comparative example 2, the capacity density of battery core can be promoted.
Although the application is with preferred embodiment openly as above; but it is not for limiting claim; any those skilled in the art are under the premise conceived without departing from the application; can making some possible variations and amendment, therefore the protection domain of the application should be as the criterion with the scope that the application claim defines.
Claims (10)
1. a secondary cell, including by anode pole piece, cathode pole piece, the flat battery core of membrane winding that is arranged between described anode pole piece and described cathode pole piece, described anode pole piece includes plus plate current-collecting body and is attached to the positive electrode active material layer of anode collection surface, and described cathode pole piece includes negative current collector and is attached to the negative electrode active material layer of negative pole currect collecting surface；Being provided with the first groove on described negative electrode active material layer, negative lug is embedded in described first groove and electrically connects with negative current collector；Being provided with the second groove on described positive electrode active material layer, positive pole ear is embedded in described second groove and electrically connects with plus plate current-collecting body；It is characterized in that, described battery core includes the pars convoluta at battery core two ends, and described first groove is positioned on the negative electrode active material layer of described pars convoluta, and described second groove is positioned on the positive electrode active material layer of described pars convoluta.
2. secondary cell according to claim 1, it is characterised in that described first groove is positioned at the pars convoluta of described battery core one end, and described second groove is positioned at the pars convoluta of the described battery core other end.
3. secondary cell according to claim 2, it is characterized in that, described first groove and the position set by described second groove are symmetrical arranged with the axis of symmetry of the length direction of described battery core or are symmetrical arranged with the axis of symmetry of the thickness direction of described battery core or are centrosymmetric with the center of described battery core.
4. secondary cell according to claim 1, it is characterized in that, the negative electrode active material layer of described cathode pole piece is provided with multiple first groove, described negative lug all it is inlaid with in each first groove, the positive electrode active material layer of described anode pole piece is provided with multiple second groove, in each second groove, is all inlaid with described positive pole ear.
5. secondary cell according to claim 4, it is characterised in that the width of described positive pole ear is 1～100 times of positive pole ear thickness, the width of described negative lug is 1～100 times of negative lug thickness.
6. secondary cell according to claim 1, it is characterised in that described positive pole ear is arc, the radian of described arc is consistent with the radian in the site that is connected with positive pole ear on described pars convoluta；Described negative lug is arc, and the radian of described arc is consistent with the radian in the site that is connected with negative lug on described pars convoluta.
7. secondary cell according to claim 1, it is characterised in that the thickness of described negative lug is less than or equal to the degree of depth of described first groove, and the thickness of described positive pole ear is less than or equal to the degree of depth of described second groove.
8. secondary cell according to claim 1, it is characterised in that also include glue-line in described battery core, described glue-line is arranged on described negative lug surface and covers whole first groove and/or be arranged on described positive pole ear surface and cover whole second groove.
9. secondary cell according to claim 1, it is characterised in that the upper and lower surface of described negative current collector all adheres to negative electrode active material layer, the negative electrode active material layer of the opposite side corresponding with the first groove location is provided with negative pole para-position groove.
10. secondary cell according to claim 1, it is characterised in that the upper and lower surface of described plus plate current-collecting body all adheres to positive electrode active material layer, the positive electrode active material layer of the opposite side corresponding with the second groove location is provided with positive pole para-position groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620146682.1U CN205355181U (en) | 2016-02-26 | 2016-02-26 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620146682.1U CN205355181U (en) | 2016-02-26 | 2016-02-26 | Secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205355181U true CN205355181U (en) | 2016-06-29 |
Family
ID=56183881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620146682.1U Active CN205355181U (en) | 2016-02-26 | 2016-02-26 | Secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205355181U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111632887A (en) * | 2020-04-23 | 2020-09-08 | 惠州锂威新能源科技有限公司 | Method for cleaning lithium ion battery pole piece |
| CN113611986A (en) * | 2021-07-30 | 2021-11-05 | 东莞新能德科技有限公司 | Battery cell, battery and electronic equipment |
-
2016
- 2016-02-26 CN CN201620146682.1U patent/CN205355181U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111632887A (en) * | 2020-04-23 | 2020-09-08 | 惠州锂威新能源科技有限公司 | Method for cleaning lithium ion battery pole piece |
| CN111632887B (en) * | 2020-04-23 | 2022-04-15 | 惠州锂威新能源科技有限公司 | Method for cleaning lithium ion battery pole piece |
| CN113611986A (en) * | 2021-07-30 | 2021-11-05 | 东莞新能德科技有限公司 | Battery cell, battery and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102683634B (en) | High-capacity cylindrical lithium ion cell and production method thereof | |
| CN207611809U (en) | A kind of anode slice of lithium ion battery and lithium ion battery | |
| WO2019024873A1 (en) | Soft pack lithium ion battery and manufacturing method therefor | |
| CN202495523U (en) | Lithium ion battery and electrode plate thereof | |
| CN100517852C (en) | A coiling lithium ion battery and its making method | |
| CN110729447A (en) | Battery cell pole piece and battery cell | |
| CN205564871U (en) | Anodal pole piece and winding - type batteries | |
| CN101847745B (en) | Energy-storing device with low internal resistance and production method thereof | |
| CN213546383U (en) | Lithium ion battery roll core | |
| CN112531142A (en) | Pole piece for soft package button battery, button battery and preparation method of pole piece | |
| CN201478392U (en) | High-power lithium ion power battery with collecting disc | |
| CN216311911U (en) | Big cylindrical battery structure of full utmost point ear | |
| CN205355181U (en) | Secondary battery | |
| CN103219524B (en) | A kind of laminated lithium ion battery plus plate current-collecting body paillon foil, anode pole piece and battery | |
| CN203119048U (en) | Double-lug battery roll core and lithium ion battery with same | |
| CN212434666U (en) | Anode plate and lithium ion battery | |
| CN116454412A (en) | Winding type battery cell and secondary battery | |
| CN201576714U (en) | Low-inner resistance power-storing device | |
| CN215184061U (en) | Current collector-free battery core and energy storage device | |
| CN205376640U (en) | Battery sheet and adopt this battery sheet's secondary cell | |
| CN202275719U (en) | High-power two-end lead-out type super capacitor and battery | |
| CN101499541A (en) | Novel winding type lithium ionic cell and manufacturing method thereof | |
| CN203800137U (en) | Nickel-metal hydride (Ni-MH) battery | |
| CN208539023U (en) | A kind of cylindrical battery | |
| CN202058814U (en) | Circular lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |