CN208368658U - Takeup type battery core and the battery for using the takeup type battery core - Google Patents
Takeup type battery core and the battery for using the takeup type battery core Download PDFInfo
- Publication number
- CN208368658U CN208368658U CN201820686881.0U CN201820686881U CN208368658U CN 208368658 U CN208368658 U CN 208368658U CN 201820686881 U CN201820686881 U CN 201820686881U CN 208368658 U CN208368658 U CN 208368658U
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- Prior art keywords
- pole piece
- collector
- battery core
- pole
- takeup type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model relates to a kind of takeup type battery core and use the battery of the takeup type battery core, takeup type battery core includes the first pole piece of coiling and molding, second pole piece and the first diaphragm between two pole pieces, first pole piece and the second pole piece all have main part and bending part, first, second pole piece includes collector, it further include the extending direction along collector coated on multiple active matter mass at main part, each active material block gap arrangement corresponding with the bending part is left white region to be formed, one collector is ribbon structure in first pole piece and the second pole piece, another includes along the spaced apart multiple collector piecemeals of collector extending direction, the active matter mass is correspondingly arranged on each collector piecemeal.The not set active matter mass of bending part is conducive to the heat dissipation of takeup type battery core and handles convenient for the subsequent pressing to takeup type battery core.
Description
Technical field
The utility model relates to a kind of takeup type battery core and use the battery of the takeup type battery core.
Background technique
The development of new-energy automobile is of great significance for alleviating problem of environmental pollution and energy crisis, and power battery is
The core component of new-energy automobile.Lithium ion battery is due to high-energy density, high power density, long-life, memoryless effect
The advantages that answering becomes the first choice of new energy car battery.As new-energy automobile needs the performances such as course continuation mileage and charging rate
The promotion asked, more stringent requirements are proposed for energy density and rate of charge to lithium ion battery, the design of core strueture for
The promotion of energy density and rate of charge is most important.
Existing core strueture is mostly if application publication number is the hair shown in application for a patent for invention shown in CN102122727A
Bright patent application discloses a kind of lithium ion battery and its battery cell, and battery cell is takeup type battery core, takeup type electricity
Core is formed by the first pole piece, the second pole piece and the membrane winding between the first pole piece and the second pole piece.Wherein, the first pole
One of them of piece and the second pole piece are anode pole piece, another is cathode pole piece.First pole piece includes the first collector and painting
The first active material layer in the first collector both side surface is overlayed on, the second pole piece includes the second collector and collects coated in second
The second active material layer in fluid both side surface.First pole piece, isolation film and the second pole piece are wound, also,
The first tab is connected on one collector, and the second tab is connected on the second collector.
The first pole piece and the second pole piece in takeup type battery core in the prior art include main part and bending part,
Active material layer extends to main part and bending part, since active material layer is arranged in bending part, causes takeup type electric
Core is not easy bending, influences the pressing of takeup type battery core.Active material layer, which is easy to happen, after bending fractures.Moreover, in bending part
Place's setting active material layer, the active material layer at this can stop the release of heat in inner pole piece.The hair of above-mentioned various situations
The raw normal use that will affect takeup type battery core, reduces the service life.
Utility model content
The purpose of this utility model is to provide a kind of takeup type battery cores, to solve the bending part of pole piece in the prior art
The technical issues of place is arranged active material layer and influences takeup type battery core normal use；The electricity for using the takeup type battery core is also provided
Pond.
To achieve the above object, the technical solution of the utility model takeup type battery core is: a kind of takeup type battery core, including volume
Around molding first pole piece, the second pole piece and the first diaphragm between two pole pieces, the first pole piece and the second pole piece are all had
Main part and bending part, the first, second pole piece include collector, further include the extending direction along collector coated on master
Multiple active matter mass of body portion, each active material block gap arrangement corresponding with the bending part are left white area to be formed
One collector is ribbon structure in domain, the first pole piece and the second pole piece, another includes along collector extending direction interval
Multiple collector piecemeals of arrangement are correspondingly arranged on the active matter mass on each collector piecemeal.
The beneficial effects of the utility model are: the first pole piece and the second pole piece include collector in the utility model, collection
The multiple active matter mass extended along collector, the main part of active matter mass and the first, second pole piece are provided on fluid
Divide and correspond to, the interval between multiple active matter mass, which forms, is left white region, and it is corresponding with bending part to be left white region.This is practical
In novel, one of collector is complete ribbon structure, another collector includes multiple collector piecemeals, each active matter
Mass correspondence is arranged on collector piecemeal.Between adjacent active material block to be left white region corresponding with bending part so that
The not set active matter mass of bending part, avoids and is broken at bending part, alleviates the weight of takeup type battery core, and
And the not set active matter mass of bending part is conducive to the heat dissipation of takeup type battery core and convenient for the subsequent pressing to takeup type battery core
Processing.In the utility model, one of collector is divided into multiple collector piecemeals, arranges and lives on each collector piecemeal
Property material block, can realize that energy density is promoted by loss of weight, another collector be set as complete ribbon structure, be conducive to each
Collector piecemeal and active matter mass are fixed on diaphragm, convenient active material block alignment and electricity on another collector
Core batch micro operations.
The corresponding arrangement in the inner end of first pole piece and the second pole piece, first pole piece have positioned at the interior pole of innermost layer
Piece part, the first pole piece or the second pole piece, which have, is located at outermost outer pole piece part, the lateral surface of interior pole part and outer pole
The upper single side of at least one of medial surface of piece part is coated with corresponding active matter mass.
The upper single side coating of at least one of the lateral surface of interior pole part and the medial surface of outer pole piece part is active
Material block is avoided in the prior art on interior pole part and outer pole piece part compared with equal dual coating active matter mass
The active matter mass useless to charge and discharge is coated on the medial surface of interior pole part and the lateral surface of outer pole piece part, is conducive to subtract
The weight of light takeup type battery core reduces processing cost.Moreover, removing the active matter mass of a portion, part can be vacateed
For flattening takeup type battery core, it is more to coat the active matter mass useful to charge and discharge in identical space in space, has
It is improved with the density of active material.
The corresponding arrangement in the head and the tail both ends of first pole piece and the second pole piece, and the first pole piece is located at the inside of the second pole piece,
The outer pole piece part is set on the second pole piece.
Takeup type battery core further includes the second diaphragm away from first diaphragm set on the first pole piece or the second pole piece, institute
It states the second diaphragm and extends to the inside of interior pole part and the outside of outer pole piece part.
Takeup type battery core is by the first pole piece, the second pole piece and the rectangular square electric cell being wound of the first diaphragm.
The technical solution of the utility model battery is: a kind of battery, including takeup type battery core, and takeup type battery core includes winding
Molding first pole piece, the second pole piece and the first diaphragm between two pole pieces, the first pole piece and the second pole piece all have master
Body portion and bending part, the first, second pole piece include collector, further include the extending direction along collector coated on main body
Multiple active matter mass at part place, each active material block gap are arranged to be formed and corresponding with the bending part be left white area
One collector is ribbon structure in domain, the first pole piece and the second pole piece, another includes along collector extending direction interval
Multiple collector piecemeals of arrangement are correspondingly arranged on the active matter mass on each collector piecemeal.
The corresponding arrangement in the inner end of first pole piece and the second pole piece, first pole piece have positioned at the interior pole of innermost layer
Piece part, the first pole piece or the second pole piece, which have, is located at outermost outer pole piece part, the lateral surface of interior pole part and outer pole
The upper single side of at least one of medial surface of piece part is coated with corresponding active matter mass.
The corresponding arrangement in the head and the tail both ends of first pole piece and the second pole piece, and the first pole piece is located at the inside of the second pole piece,
The outer pole piece part is set on the second pole piece.
Takeup type battery core further includes the second diaphragm away from first diaphragm set on the first pole piece or the second pole piece, institute
It states the second diaphragm and extends to the inside of interior pole part and the outside of outer pole piece part.
Takeup type battery core is by the first pole piece, the second pole piece and the rectangular square electric cell being wound of the first diaphragm.
Detailed description of the invention
Fig. 1 is the schematic diagram of anode pole piece in the utility model takeup type battery core embodiment 1；
Fig. 2 is the schematic diagram in the utility model takeup type battery core embodiment 1 under battery core unfolded state；
Fig. 3 is that the schematic diagram of the utility model takeup type battery core embodiment 1 (only includes three collector piecemeals in figure, together
When will wind battery core flip horizontal)；
Fig. 4 is the schematic diagram of cathode pole piece in the utility model takeup type battery core embodiment 2；
Fig. 5 is the schematic diagram in the utility model takeup type battery core embodiment 2 under battery core unfolded state；
Fig. 6 is that the schematic diagram of the utility model takeup type battery core embodiment 2 (only includes three collector piecemeals in figure, together
When will wind battery core flip horizontal).
Specific embodiment
The embodiments of the present invention is described further with reference to the accompanying drawing.
The specific embodiment 1 of the takeup type battery core of the utility model, as shown in Figure 1 to Figure 3, takeup type battery core include anode
Pole piece 1, cathode pole piece 2 and the diaphragm 3 between anode pole piece 1 and cathode pole piece 2, meanwhile, in deviating from for cathode pole piece 2
The side of anode pole piece 1 is also disposed with diaphragm 3.Diaphragm 3 between anode pole piece 1 and cathode pole piece 2 is the first diaphragm, is born
The diaphragm of 2 other side of pole pole piece is the second diaphragm.Takeup type battery core in the present embodiment is square electric cell.
Anode pole piece 1 includes in the plus plate current-collecting body 11 of complete band distribution, and the two sides of plus plate current-collecting body 11 are coated with
There is positive electrode active material layer, the positive electrode active material layer in the present embodiment includes the extending direction interval cloth along plus plate current-collecting body 11
The positive electrode active material mass 12 of the multiple positive electrode active material mass 12 set, two sides corresponds to each other, two neighboring positive active material
It is formd between block 12 and is left white region.
Cathode pole piece 2 includes negative current collector and coated on the negative electrode active material layer on negative current collector two sides,
In, only single side is coated in close to the side of anode pole piece 1 negative electrode active material layer in the left part of negative current collector.Cathode
Collector includes along the spaced apart multiple collector piecemeals 23 of negative current collector extending direction, and each negative electrode active material layer also wraps
It includes along collector extending direction arranged for interval and negative electrode active material mass 22 corresponding with each collector piecemeal 23.As shown in Figure 2,
Left side two collector piecemeals 23 towards single side on the side of anode pole piece 1 be coated with negative electrode active material mass 22, separately
Side is uncoated.
Anode pole piece 1, cathode pole piece 2 and diaphragm 3 are placed and fixed according to mode shown in Fig. 3, it is specific to roll up
Around when, it is positive in Fig. 3 after winding by the right end of anode pole piece 1, cathode pole piece 2 and diaphragm 3 in Fig. 3 by being wound clockwise
The left end of pole piece 1, cathode pole piece 2 and diaphragm 3 is located at internal layer, and right end is located at outer layer, and winding forms battery core shown in Fig. 3 (in Fig. 3
Battery core after winding flip horizontal is subjected to).
From the figure 3, it may be seen that anode pole piece 1 and cathode pole piece 2 include the main part of lateral arrangement and the bending that is vertically arranged
Part is formd due to the active material block gap arrangement on anode pole piece 1 and cathode pole piece 2 and is left white region, after winding, stayed
White region is corresponding with bending part, and active matter mass is corresponding with main part.After winding, rupture etc. is less likely to occur bending part
Situation does not influence consequent activities material sections moreover, the not set active matter mass of bending part causes the lateral side regions of battery core very thin
The pressing in domain, meanwhile, the inactive material block heat production of bending part, heat can shed from side.
By Fig. 3 it is recognised that anode pole piece and cathode pole piece head and the tail both ends are corresponding, innermost layer is located in cathode pole piece 2
Part constitutes interior pole part, is located at outermost part in anode pole piece and constitutes outer pole piece part.Institute in the present embodiment
The interior pole part of finger refers to that the part for not winding anode pole piece in 2 innermost layer of cathode pole piece again, outer pole piece part refer to anode
The part not wound again by cathode pole piece in 1 outermost layer of pole piece.Two 23 two sides of collector piecemeal are opposite in interior pole part
Diaphragm 3 is provided between arrangement and two sides.Interior pole part is designed as to the structure of single side coating outwardly, is based on reduction volume
The cost of wound battery core and improved electric action active material density purpose.Positive active material in takeup type battery core
Layer and negative electrode active material layer are used cooperatively, and positive and negative electrode active material layer sets up separately prevents positive and negative electrode living in the two sides of diaphragm
Property material layer direct short-circuit, and diaphragm can be for free ion by realizing charge and discharge.In the present embodiment, if by interior pole
Part is designed as dual coating negative electrode active material layer, then caused result is cathode occur in the innermost layer of takeup type battery core
Active material layer and negative electrode active material layer situation positioned opposite, do not have the function of charge and discharge, set at innermost layer
Setting negative electrode active material layer not only cannot play the role of increasing discharge and recharge, also improve the cost of takeup type battery core, moreover,
The volume that the inside coating negative electrode active material layer of interior pole part also will increase takeup type battery core rises under certain volume
The coated weight of the active material layer of electric action reduces, and is unfavorable for improving the global density of active material layer.
In the utility model by one in positive and negative plate collector be complete strip structure, another collector
For the structure of multiple piecemeals, the equal piecemeal arrangement of collector for avoiding positive and negative plate causes positive and negative plate correspondence is poor to ask
Topic, while collector piecemeal arrangement is conducive to heat dissipation.
The specific embodiment 2 of the takeup type battery core of the utility model, as described in fig. 4 to fig. 6, it is different from embodiment 1 it
It is in the collector of anode pole piece being divided into multiple collector piecemeals 13, multiple collector piecemeals 13 are solid in the present embodiment
It is located on diaphragm 3, positive electrode active material mass 12 is set on each collector piecemeal 13, the negative current collector 21 of cathode pole piece 2 is
Complete strip structure, the multiple negative electrode active material mass 22 of arranged for interval on negative current collector 21.Meanwhile in cathode pole piece 2
Left end only on the side towards anode pole piece arrange negative electrode active material mass 22.
The specific embodiment 3 of the utility model takeup type battery core, with above-described embodiment the difference is that, above-mentioned implementation
In example, the only single layer coating active material layer on the lateral surface of interior pole part, in the present embodiment, while in outer pole piece part
Single layer coating active material layer on medial surface can not further decrease the active material layer amount of charge and discharge electro ultrafiltration.Alternatively, can be only
The single layer coating active material layer on the medial surface of outer pole piece part.
In above-described embodiment, one in anode pole piece and cathode pole piece is the first pole piece, another is the second pole piece,
The position of positive and negative plate mutually wound can be interchanged.In above-described embodiment, the head and the tail both ends of two pole pieces are corresponding,
So that interior pole part is located on the pole piece of inside, outer pole piece part is located on the pole piece in outside, in other embodiments, can incite somebody to action
The outer end of the pole piece of inside again wraps around one week, and outer pole piece part is made to be also formed in the other end of the pole piece of inside.
The specific embodiment of the utility model battery, battery include takeup type battery core, the structure of takeup type battery core with it is above-mentioned
It is consistent in embodiment.
Claims (10)
1. a kind of takeup type battery core, the first pole piece, the second pole piece including coiling and molding and first between two pole pieces every
Film, the first pole piece and the second pole piece all have main part and bending part, it is characterised in that: the first, second pole piece includes
Collector further includes the extending direction along collector coated on multiple active matter mass at main part, each active matter mass
Arranged for interval with formed it is corresponding with the bending part be left white region, one collector is in the first pole piece and the second pole piece
Ribbon structure, another includes right along the spaced apart multiple collector piecemeals of collector extending direction, each collector piecemeal
The active matter mass should be provided with.
2. takeup type battery core according to claim 1, it is characterised in that: the inner end pair of first pole piece and the second pole piece
It should arrange, first pole piece has positioned at the interior pole part of innermost layer, and the first pole piece or the second pole piece have positioned at outermost
The upper single side of at least one of medial surface of the outer pole piece part of layer, the lateral surface of interior pole part and outer pole piece part is coated with
Corresponding active matter mass.
3. takeup type battery core according to claim 2, it is characterised in that: the head and the tail both ends of the first pole piece and the second pole piece are equal
Corresponding arrangement, and the first pole piece is located at the inside of the second pole piece, the outer pole piece part is set on the second pole piece.
4. takeup type battery core according to claim 3, it is characterised in that: takeup type battery core further include set on the first pole piece or
The second diaphragm away from first diaphragm of second pole piece, second diaphragm extend to the inside and outer pole of interior pole part
The outside of piece part.
5. takeup type battery core according to claim 1 or 2 or 3 or 4, it is characterised in that: takeup type battery core is by the first pole
Piece, the second pole piece and the rectangular square electric cell being wound of the first diaphragm.
6. a kind of battery, including takeup type battery core, takeup type battery core includes the first pole piece of coiling and molding, the second pole piece and is located at
The first diaphragm between two pole pieces, the first pole piece and the second pole piece all have main part and bending part, it is characterised in that: the
One, the second pole piece includes collector, further includes the extending direction along collector coated on multiple active matters at main part
Mass, each active material block gap arrangement corresponding with the bending part are left white region, the first pole piece and the second pole to be formed
One collector is ribbon structure in piece, another includes along the spaced apart multiple collectors of collector extending direction point
Block is correspondingly arranged on the active matter mass on each collector piecemeal.
7. battery according to claim 6, it is characterised in that: the inner end of first pole piece and the second pole piece corresponds to cloth
It sets, first pole piece has positioned at the interior pole part of innermost layer, and the first pole piece or the second pole piece have positioned at outermost
The upper single side of at least one of medial surface of outer pole piece part, the lateral surface of interior pole part and outer pole piece part, which is coated with, to be corresponded to
Active matter mass.
8. battery according to claim 7, it is characterised in that: the head and the tail both ends of the first pole piece and the second pole piece correspond to cloth
It sets, and the first pole piece is located at the inside of the second pole piece, the outer pole piece part is set on the second pole piece.
9. battery according to claim 8, it is characterised in that: takeup type battery core further includes being set to the first pole piece or the second pole
The second diaphragm away from first diaphragm of piece, second diaphragm extend to the inside and outer pole piece part of interior pole part
Outside.
10. battery described according to claim 6 or 7 or 8 or 9, it is characterised in that: takeup type battery core is by the first pole piece, the
Two pole pieces and the rectangular square electric cell being wound of the first diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820686881.0U CN208368658U (en) | 2018-05-09 | 2018-05-09 | Takeup type battery core and the battery for using the takeup type battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820686881.0U CN208368658U (en) | 2018-05-09 | 2018-05-09 | Takeup type battery core and the battery for using the takeup type battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208368658U true CN208368658U (en) | 2019-01-11 |
Family
ID=64933933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820686881.0U Active CN208368658U (en) | 2018-05-09 | 2018-05-09 | Takeup type battery core and the battery for using the takeup type battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208368658U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190319A (en) * | 2019-05-27 | 2019-08-30 | 宁德时代新能源科技股份有限公司 | electrode assembly and secondary 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 |
-
2018
- 2018-05-09 CN CN201820686881.0U patent/CN208368658U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110190319A (en) * | 2019-05-27 | 2019-08-30 | 宁德时代新能源科技股份有限公司 | electrode assembly and secondary battery |
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