CN110034323A - A kind of wound battery core of cylindrical roll and cylindrical battery - Google Patents
A kind of wound battery core of cylindrical roll and cylindrical battery Download PDFInfo
- Publication number
- CN110034323A CN110034323A CN201910278011.9A CN201910278011A CN110034323A CN 110034323 A CN110034323 A CN 110034323A CN 201910278011 A CN201910278011 A CN 201910278011A CN 110034323 A CN110034323 A CN 110034323A
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- Prior art keywords
- negative electrode
- electrode tab
- diaphragm
- outer end
- outside
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- 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
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
- H01M10/286—Cells or batteries with wound or folded electrodes
-
- 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
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/75—Wires, rods or strips
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to battery technology fields, and in particular to a kind of wound battery core of cylindrical roll and cylindrical battery.The wound battery core of cylindrical roll of the invention, including positive plate, negative electrode tab, diaphragm, the negative electrode tab include negative current collector and the negative electrode material layer that negative current collector surface is arranged in, and one end that the negative electrode tab is in outside covers one end that positive plate is in outside；The negative electrode tab is in bonding in the outside circumference of the one end in outside and is provided with adhesive tape layer；The end that the negative electrode tab is in the one end in outside is provided with the strip-shaped conductive portion being conductively connected with negative current collector；The strip-shaped conductive portion is pressed on the high-temp glue belt outer peripheral surface.In the wound battery core of cylindrical roll of the invention, adhesive tape layer is set on outermost negative electrode tab surface, the negative electrode material layer that negative electrode tab is on the outside of battery core has been subjected to package protection, has avoided and loses powder under the action of electrolyte.
Description
Technical field
The present invention relates to battery technology fields, and in particular to a kind of wound battery core of cylindrical roll and cylindrical battery.
Background technique
Nickel-zinc cell has the characteristics that low self-discharge, low cost as a kind of new secondary battery, and voltage is compared with cadmium nickel
Battery and nickel-metal hydride battery will be high, become the most potential substitute of nickel-metal hydride battery.And the discharge current of nickel-zinc cell is big,
Power tool and electric car field also have immeasurable application prospect.
It is cathode that cylindrical nickel-zinc cell, which is typically designed metal shell, and cap is anode, but inside housings, negative electrode material
It avoids contacting with inner walls, forms micro- electricity to avoid negative electrode active material and casing metal material (generally Steel material)
Negative electrode material and corrosion cell shell are lost in pond, and battery performance is caused to decline or fail.
In order to avoid negative electrode active material is contacted with metal shell inner wall in cylindrical nickel-zinc cell, generally using diaphragm or
The method that adhesive tape wraps up the cathode of battery roll core outer layer.This complex operation, and be mostly hand-manipulated, inefficiency,
Moreover, this mode is unable to fully improve the conductive area between cathode and shell, causes the internal resistance of cell larger, be also unfavorable for electricity
Pond heavy-current discharge.
Authorization Notice No. is that the Chinese utility model patent of CN204991823U discloses a kind of cylinder zinc-nickel secondary batteries,
The cylindrical zinc-nickel secondary cell includes cylindrical metal container and the core that is assemblied in metal shell, and the core includes
Cathode and the anode on the inside of cathode, are equipped with diaphragm between cathode and anode, the cathode, diaphragm, anode winding are constituted
The core, the cathode include for the cathode current collection skeleton in its surface coating negative electrode active material layer, the cathode
The side of current collection skeleton towards metal shell bottom is provided with the conductive connection part for being electrically connected with metal shell bottom, described
Cathode extends outwardly along coiling direction and has the conduction being in electrical contact with metal shell inner wall close to one end of metal shell inner wall
Band, the conductive strips are wholely set with the cathode current collection skeleton.But this battery conductive band is pasted with corresponding pole piece
Defective tightness is closed, the electrode material of pole piece, which is easy to happen, to fall off, loses powder.
Summary of the invention
The present invention provides a kind of wound battery core of cylindrical roll to solve negative electrode tab surface in the prior art and be easy asking for picking
Topic.The present invention also provides a kind of cylindrical batteries using the wound battery core of above-mentioned cylindrical roll.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
A kind of wound battery core of cylindrical roll, including positive plate, negative electrode tab, diaphragm, the negative electrode tab include negative current collector
With the negative electrode material layer that negative current collector surface is arranged in, positive plate is in outside by one end that the negative electrode tab is in outside
One end covering；The negative electrode tab is in bonding in the outside circumference of the one end in outside and is provided with adhesive tape layer；The negative electrode tab is in
The end of the one end in outside is provided with the strip-shaped conductive portion being conductively connected with negative current collector；The strip-shaped conductive portion is pressed on institute
It states on high-temp glue belt outer peripheral surface.
The strip-shaped conductive portion is wholely set with negative current collector.When being wholely set, the thickness and cathode of strip-shaped conductive portion
The thickness of collector is equal.
The circumferential lengths of the strip-shaped conductive portion are the 1/6 to 1/2 of the circumferential lengths of takeup type battery core.The circumferential direction of battery core
Length is the circumferential lengths of the outermost outer peripheral surface of battery core.
The adhesive tape layer is double-sided adhesive, and the inner adhesion of adhesive tape layer is on negative electrode tab outer peripheral surface, the interior table of strip-shaped conductive portion
Face is bonded on the outer surface of adhesive tape layer.Preferably, the adhesive tape layer is high temperature gummed tape.
The outer end of negative electrode tab grows the outer end of positive plate；The diaphragm include the first diaphragm, the second diaphragm, described first every
Film is bonded with the inner surface of negative electrode tab, and second diaphragm is bonded with the inner surface of positive plate；The outer end of first diaphragm is long
The outer end of negative electrode tab out, the outer end of the second diaphragm grow the outer end of negative electrode tab, and the first diaphragm outer end and the second diaphragm outer end are grown
The part of negative electrode tab is bonded to each other to form two-layer separator outer end, and the outer end of the negative electrode tab is pressed on the appearance of two-layer separator outer end
On face.
The negative electrode tab is on one end of inside and is enclosed with protective case.
A kind of cylindrical battery, including shell and setting are in the wound battery core of the intracorporal cylindrical roll of shell, the cylindrical roll
Wound battery core includes positive plate, negative electrode tab, diaphragm, and the negative electrode tab includes negative current collector and is arranged on negative current collector surface
Negative electrode material layer, the negative electrode tab is in the one end in outside and covers one end that positive plate is in outside；At the negative electrode tab
Bonding in the outside circumference of the one end in outside is provided with adhesive tape layer；The end that the negative electrode tab is in the one end in outside is provided with
The strip-shaped conductive portion being conductively connected with negative current collector；The strip-shaped conductive portion is pressed on the high-temp glue belt outer peripheral surface.
The strip-shaped conductive portion is wholely set with negative current collector.When being wholely set, the thickness and cathode of strip-shaped conductive portion
The thickness of collector is equal.
The circumferential lengths of the strip-shaped conductive portion are the 1/6 to 1/2 of the circumferential lengths of takeup type battery core.The circumferential direction of battery core
Length is the circumferential lengths of the outermost outer peripheral surface of battery core.
The adhesive tape layer is double-sided adhesive, and the inner adhesion of adhesive tape layer is on negative electrode tab outer peripheral surface, the interior table of strip-shaped conductive portion
Face is bonded on the outer surface of adhesive tape layer.Preferably, the adhesive tape layer is high temperature gummed tape.
The outer end of negative electrode tab grows the outer end of positive plate；The diaphragm include the first diaphragm, the second diaphragm, described first every
Film is bonded with the inner surface of negative electrode tab, and second diaphragm is bonded with the inner surface of positive plate；The outer end of first diaphragm is long
The outer end of negative electrode tab out, the outer end of the second diaphragm grow the outer end of negative electrode tab, and the first diaphragm outer end and the second diaphragm outer end are grown
The part of negative electrode tab is bonded to each other to form two-layer separator outer end, and the outer end of the negative electrode tab is pressed on the appearance of two-layer separator outer end
On face.
The negative electrode tab is on one end of inside and is enclosed with protective case.
In the wound battery core of above-mentioned cylindrical roll and cylindrical battery, the outer end of negative electrode tab refers in the both ends of negative electrode tab,
Comparatively, the one end in outside is in battery core.The outer end of positive plate refers in the both ends of positive plate, comparatively, in electricity
The one end in outside is in core.The outer end of first diaphragm refers in the both ends of the first diaphragm, comparatively, in outer in battery core
One end of side.The outer end of second diaphragm refers in the both ends of the second diaphragm, comparatively, the one end in outside is in battery core.
The outer surface of above-mentioned first diaphragm is bonded with the inner surface of negative electrode tab, the inner surface and anode of the first diaphragm
The outer surface of piece is bonded.The outer surface of second diaphragm is bonded with the inner surface of positive plate, the inner surface of the second diaphragm
It is bonded with the outer surface of negative electrode tab.
The utility model has the advantages that
In the prior art, after the battery core in cylindrical battery enters shell, structure is more loose between the pole piece and diaphragm in battery core
It dissipates, with the growth of service time of battery, is easy to happen relative motion between more open pole piece, is easy to happen electrode material
Picking also results in and is easy to appear conductive bad problem at pole piece and tab and other conductive connections.Under extreme conditions, such as
Fruit battery shakes for a long time, it is likely that causes to occur at pole piece and tab or the conductive connections such as tab and cover board disconnected
It splits, influence the use of battery and reduces the safety of battery.In the wound battery core of cylindrical roll of the invention, outermost negative
Adhesive tape layer is arranged in pole piece, and the negative electrode material layer that negative electrode tab is on the outside of battery core has been carried out package protection, has been avoided in electricity
It loses powder under the action of solution liquid.Strip-shaped conductive portion is made of metal, moreover it is possible to which bending is fitted in negative electrode tab surface, plays to battery core
Firm effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cylindrical battery of the invention；
Fig. 2 is the structural schematic diagram of the wound battery core of cylindrical roll of the invention；
Fig. 3 is the structural schematic diagram of negative electrode tab in the wound battery core of cylindrical roll of the invention；
Fig. 4 is the cross-sectional view of another negative electrode tab in the wound battery core of cylindrical roll of the invention.
Specific embodiment
In order to be easier to understand the technical problems, technical solutions and beneficial effects solved by the present invention, below with reference to attached
The present invention is described in detail for figure and specific embodiment.
As Figure 1-Figure 4, the wound battery core of cylindrical roll of the invention is zinc-nickel cell battery core, by positive plate 1, cathode
Piece 2, diaphragm 3 are wound.Diaphragm 3 can use a diaphragm, and after doubling, positive plate 1 is folded among the diaphragm of doubling,
Then negative electrode tab 2 is overlayed to the outside of side diaphragm.Then according to the sequence of " negative electrode tab-diaphragm-positive plate-diaphragm ", make
Negative electrode tab is outside, so that layer (side) diaphragm on stacking thickness direction far from negative electrode tab is in inside and is wound and is rolled up
Wound battery core.
The length of negative electrode tab 2 is longer than the length of positive plate 1, and when stacking, the both ends of negative electrode tab 2 are grown than positive plate 1
One end distance, than the head 21 and tail portion 22 that the part that positive plate 1 is grown has respectively constituted negative electrode tab 2.After winding, what is obtained
In takeup type battery core, the head 21 of negative electrode tab 2 is located at the inner hub location of battery core, and the tail portion 22 of negative electrode tab 2 is then located at electricity
The outer fix of core.
The biseptate length formed after doubling is longer than the length of negative electrode tab, certainly also longer than the length of positive plate.
After winding, in the outside of battery core, the part that layer of diaphragm (inside diaphragm) in inside grows positive plate is fitted in corresponding
The surface of negative electrode tab adjacent thereto.The part that layer of diaphragm (outside diaphragm) in outside grows positive plate is folded to medial septal
Film 31 is simultaneously fitted in inside membrane surface.Inside diaphragm 31 is concordant with the end that outside diaphragm 32 grows negative electrode tab.
It winds in the battery core formed, compared with positive plate and diaphragm, negative electrode tab is in outermost.In outermost negative electrode tab
Outer peripheral surface on paste and one layer of high temperature gummed tape and form high-temp glue belt 4.Specifically, the circumferential lengths of high-temp glue belt 4 are substantially
Equal to the circumferential lengths of battery core.
Negative electrode tab includes negative current collector 23 and coated in the negative electrode material layer 231 on two surfaces of negative current collector,
The main component of negative electrode material layer is zinc oxide.The head and tail portion of negative electrode tab are respectively arranged with the area of uncoated negative electrode material layer
Domain.Collector i.e. between the end face of negative current collector one end corresponding with cathode sheet head and the corresponding end surface of negative electrode material layer
Surface is not coated by negative electrode material layer, forms plain edge area.Likewise, the end face of negative current collector one end corresponding with negative electrode tab tail portion
Collection liquid surface between the corresponding end surface of negative electrode material layer is not coated by negative electrode material layer, forms plain edge area.Negative electrode tab tail portion
The negative pole currect collecting body portion of corresponding uncoated negative electrode material constitutes conductive part 24.
The length of conductive part 24 in the circumferential is about the 1/6 of the circumferential lengths of battery core outer peripheral surface.The length may be configured as it
His length, for example, it may be the 1/6 to 1/2 of the circumferential lengths of battery core outer peripheral surface, being usually no more than 1/4 is advisable.Conductive part 24
Fitting is pressed on the outer peripheral surface of high-temp glue belt 4.
Specifically, the outer end (one end after winding on the outside of battery core) of positive plate 1 and the outer end of negative electrode tab 2 are (after winding
One end on the outside of battery core), the outer end of diaphragm 3, high-temp glue belt 4, conductive part 24 specific structure relationship are as follows:
The outer end of negative electrode tab 2 is pressed on the outer end of positive plate 1 and covers the outer end of positive plate 1.The outer end of negative electrode tab 2 is long
The part of 1 outside end of positive plate is folded inwardly against battery core internal direction out.The outer end of outside diaphragm 32 grows the portion of positive segment
It point is folded to battery core internal direction and the part for growing positive plate with 31 outer end of inside diaphragm is bonded.Two layers of septum end after fitting
Extend on the outer peripheral surface of the secondary outer ring (secondary outer layer) of negative electrode tab after winding, and exceeds the end of negative electrode tab outmost turns (outermost layer)
The end that portion, i.e. negative electrode tab outer end grow the part of positive plate.The outer end of negative electrode tab grows the part pressure of positive plate outer end
It is located on the surface of outside diaphragm outer end, plays the role of being fixed to the outer end of outside diaphragm and inside diaphragm.
High temperature gummed tape can be one side glue or double-sided adhesive, paste on the outermost outer peripheral surface of negative electrode tab after the coiling.
When stickup, the negative electrode material layer surface of the outer peripheral surface of the outmost turns of the negative electrode tab of the inside fitting of high temperature gummed tape after the coiling.It is high
One end of warm adhesive tape is concordant with the end of negative electrode tab outermost end, this end of high temperature gummed tape is outer end.Hair, high temperature gummed tape are brought out from this
Along the oppositely extending of electric core winding direction, the end of the other end be bonded with inside diaphragm and outside diaphragm after two layers of diaphragm end
Portion's contact position stops, this one end of high temperature gummed tape is inner end.The outer surface of the inner end of high temperature gummed tape and conductive part inner surface paste
It closes.When high temperature gummed tape uses double-sided adhesive, the outer surface of the inner end of high temperature gummed tape is bonded in the inner surface of conductive part, avoids and leads
Electric portion is mobile, also ensures the stability of battery core entirety.Avoiding battery core excessively loosely leads to pole piece and tab junction, pole
Ear and cover board junction etc. are electrically connected place's poor contact, also avoid under extreme conditions, due to above-mentioned electrical connection caused by shaking
Place's fracture.
Under above situation, high temperature gummed tape is covered there is no forming complete one week on negative electrode tab outer peripheral surface.In practical life
In production, high temperature gummed tape can cover complete one week on negative electrode tab outermost layer outer peripheral surface, at this point, the inner end of high temperature gummed tape is (from diameter
Look up the end close to battery core center) end be pressed within corresponding two-layer separator end.Alternatively, high temperature gummed tape
Circumferential lengths are also longer, after the inner end of high temperature gummed tape is pressed within the end of two-layer separator, along the reversed continuation of coiling direction
It extends internally, and Chong Die with the outer end of negative electrode tab in the projection radially of battery core.High temperature gummed tape can also be by cathode at this time
Piece outer end is fixed effect.Or the circumferential lengths of high temperature gummed tape can also be more shorter, inner end can not be with bilayer
The end of diaphragm is in contact, and only need to guarantee that the inner end of high temperature gummed tape being capable of gland by conductive part.
The outer end of high temperature gummed tape can also grow the end of negative electrode tab outer end, as shown in figure 4, the outer end of high temperature gummed tape bonds
On conductive part.
It is provided with protective case 5 on the inner end (head) of negative electrode tab, such as can be paper protective case or plastic protective sleeve, by beauty
Line paper is made.To prevent the negative electrode material of cathode sheet head from falling off.Paper protective case is using equal with negative electrode tab axial height
Paper is folded in cathode sheet head after folding.In the actual production process, paper protective case can also be not provided with.
The height of above-mentioned positive plate, negative electrode tab, diaphragm, high temperature gummed tape and conductive part in battery core axial direction substantially phase
Deng, only the height of diaphragm in the axial direction be slightly larger than positive plate and negative electrode tab.
In practical operation, negative electrode tab can also be not provided with head plain edge area, the end of negative electrode material layer and corresponding negative
The end of pole collector is concordant.
Diaphragm can also take two panels diaphragm, respectively as inside diaphragm and outside diaphragm.Two panels diaphragm is in lamination, tool
After body is stacked according to the sequence of " negative electrode tab-outside diaphragm-positive plate-inside diaphragm ", makes negative electrode tab outside, make stacking thickness
That layer of diaphragm (i.e. inside diaphragm) that degree side is upwardly away from negative electrode tab is wound to obtain battery core in inside.
Above-mentioned conductive part and negative current collector is practical is integrated setting when actual production, can also take other conduction
Portion is welded on the corresponding collector end in negative electrode tab tail portion.It at this point, conductive part is band-like, such as can be nickel strap etc..
Cylindrical battery of the invention is zinc-nickel cell, including cylindrical shell 6 and setting in the intracorporal battery core of shell, battery core
The as above-mentioned wound battery core of cylindrical roll.
Claims (10)
1. a kind of wound battery core of cylindrical roll, including positive plate, negative electrode tab, diaphragm, the negative electrode tab include negative current collector and
The negative electrode material layer on negative current collector surface is set, which is characterized in that the negative electrode tab is in the one end in outside for positive plate
One end covering in outside；The negative electrode tab is in bonding in the outside circumference of the one end in outside and is provided with adhesive tape layer；It is described
The end that negative electrode tab is in the one end in outside is provided with the strip-shaped conductive portion being conductively connected with negative current collector；The strip-shaped conductive
Portion is pressed on the high-temp glue belt outer peripheral surface.
2. the wound battery core of cylindrical roll as described in claim 1, which is characterized in that the strip-shaped conductive portion and negative current collector
It is wholely set.
3. the wound battery core of cylindrical roll as described in claim 1, which is characterized in that the circumferential lengths of the strip-shaped conductive portion are
It is the 1/6 to 1/2 of the circumferential lengths of takeup type battery core.
4. the wound battery core of cylindrical roll as described in claim 1, which is characterized in that the adhesive tape layer is double-sided adhesive, adhesive tape layer
Inner adhesion on negative electrode tab outer peripheral surface, the inner surface of strip-shaped conductive portion is bonded on the outer surface of adhesive tape layer.
5. the wound battery core of cylindrical roll as described in claim 1, which is characterized in that the outer end of negative electrode tab grows the outer of positive plate
End；The diaphragm includes the first diaphragm, the second diaphragm, and first diaphragm is bonded with the inner surface of negative electrode tab, and described second
Diaphragm is bonded with the inner surface of positive plate；The outer end of first diaphragm grows the outer end of negative electrode tab, and the outer end of the second diaphragm is grown
The part that the outer end of negative electrode tab, the first diaphragm outer end and the second diaphragm outer end grow negative electrode tab is bonded to each other to be formed outside two-layer separator
End, the outer end of the negative electrode tab is pressed on the outer surface of two-layer separator outer end.
6. a kind of cylindrical battery, including shell and setting be in the wound battery core of the intracorporal cylindrical roll of shell, the cylindrical roll around
Formula battery core includes positive plate, negative electrode tab, diaphragm, and the negative electrode tab includes negative current collector and negative current collector surface is arranged in
Negative electrode material layer, which is characterized in that one end that the negative electrode tab is in outside covers one end that positive plate is in outside；It is described
Negative electrode tab is in bonding in the outside circumference of the one end in outside and is provided with adhesive tape layer；The negative electrode tab is in the end of the one end in outside
Portion is provided with the strip-shaped conductive portion being conductively connected with negative current collector；The strip-shaped conductive portion is pressed on outside the high-temp glue belt
On circumferential surface.
7. the cylindrical battery as shown in claim 6, which is characterized in that the strip-shaped conductive portion is integrally set with negative current collector
It sets.
8. the cylindrical battery as shown in claim 6, which is characterized in that the circumferential lengths of the strip-shaped conductive portion are winding
The 1/6 to 1/2 of the circumferential lengths of formula battery core.
9. the cylindrical battery as shown in claim 6, which is characterized in that the adhesive tape layer is double-sided adhesive, the inside of adhesive tape layer
It is bonded on negative electrode tab outer peripheral surface, the inner surface of strip-shaped conductive portion is bonded on the outer surface of adhesive tape layer.
10. the cylindrical battery as shown in claim 6, which is characterized in that the outer end of negative electrode tab grows the outer end of positive plate；Institute
Stating diaphragm includes the first diaphragm, the second diaphragm, and first diaphragm be bonded with the inner surface of negative electrode tab, second diaphragm and
The inner surface of positive plate is bonded；The outer end of first diaphragm grows the outer end of negative electrode tab, and the outer end of the second diaphragm grows negative electrode tab
Outer end, the part that the first diaphragm outer end and the second diaphragm outer end grow negative electrode tab is bonded to each other to form two-layer separator outer end, institute
The outer end for stating negative electrode tab is pressed on the outer surface of two-layer separator outer end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910278011.9A CN110034323A (en) | 2019-04-09 | 2019-04-09 | A kind of wound battery core of cylindrical roll and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910278011.9A CN110034323A (en) | 2019-04-09 | 2019-04-09 | A kind of wound battery core of cylindrical roll and cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110034323A true CN110034323A (en) | 2019-07-19 |
Family
ID=67237643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910278011.9A Pending CN110034323A (en) | 2019-04-09 | 2019-04-09 | A kind of wound battery core of cylindrical roll and cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110034323A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112689921A (en) * | 2020-05-20 | 2021-04-20 | 宁德新能源科技有限公司 | Electrode assembly and battery |
-
2019
- 2019-04-09 CN CN201910278011.9A patent/CN110034323A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112689921A (en) * | 2020-05-20 | 2021-04-20 | 宁德新能源科技有限公司 | Electrode assembly and battery |
| WO2021232313A1 (en) * | 2020-05-20 | 2021-11-25 | 宁德新能源科技有限公司 | Electrode assembly and battery |
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