CN208315683U - Lithium-ion electric cored structure - Google Patents
Lithium-ion electric cored structure Download PDFInfo
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- CN208315683U CN208315683U CN201820852710.0U CN201820852710U CN208315683U CN 208315683 U CN208315683 U CN 208315683U CN 201820852710 U CN201820852710 U CN 201820852710U CN 208315683 U CN208315683 U CN 208315683U
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- lithium
- thickness
- ion electric
- electrode tab
- negative electrode
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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
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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
- 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 discloses a kind of lithium-ion electric cored structure, the lithium-ion electric core is to be covered by positive plate and negative electrode tab volume and be shaped to cylindrical-shaped structure, it is spaced apart between the positive plate and negative electrode tab with diaphragm, positive plate connects anode structure, negative electrode tab connects negative pole structure, the negative pole structure includes cathode matrix and negative current collector, the cathode matrix is the copper foil of 0.01mm thickness, the cathode matrix is compound in the end of negative electrode tab, the negative current collector is the nickel strap of 0.07mm thickness, negative current collector has a first end and a second end, being equipped with multistage to first end surfaces spacing has the conductive coating with bonding agent, the conductive coating is adhered to cathode matrix surface, outside the rectilinear stretching cathode matrix of second end.By using very thin cathode connection structure so that battery core the position of connection cathode will not evagination, outer dimension is smooth.
Description
Technical field
The utility model relates to field of batteries technologies, refer in particular to a kind of lithium-ion electric cored structure.
Background technique
With the development of science and technology, each electronic product emerges one after another, almost become people's daily life in can not or
Scarce part, and lithium ion battery has that energy density is high, have extended cycle life, environmental pollution is small and it is renewable produce etc. it is many excellent
Point has been widely used at present in each electronic product.Battery core is the important component of lithium ion battery, battery core it is intensive
Degree determines the weight and capacity of battery.Under normal circumstances, it is desirable that the higher the better for closeness, in addition to this, also requires lithium cell
It is smaller thinner, in ultra-thin battery core finished product, since anode structure and negative pole structure have certain thickness, it is easy in setting anode
Protrusion occurs for structure and the position shape of negative pole structure, causes the shape out-of-flatness of entire battery core, influences product quality.
Utility model content
In view of this, the utility model is in view of the existing deficiencies of the prior art, main purpose is to provide a kind of lithium ion
Core strueture, using very thin cathode connection structure so that battery core the position of connection cathode will not evagination, outer dimension is flat
It is whole, thus overcome the deficiencies in the prior art.
To achieve the above object, the utility model is using following technical solution:
A kind of lithium-ion electric cored structure, the lithium-ion electric core are to be covered by positive plate and negative electrode tab volume and be shaped to cylindric knot
Structure is spaced apart between the positive plate and negative electrode tab with diaphragm, and positive plate connects anode structure, and negative electrode tab connects negative pole structure, institute
Stating negative pole structure includes cathode matrix and negative current collector, which is the copper foil of 0.01mm thickness, and the cathode matrix is compound
In the end of negative electrode tab, which is the nickel strap of 0.07mm thickness, and negative current collector has a first end and a second end, first
Being equipped with multistage to end surfaces spacing has the conductive coating with bonding agent, which is adhered to cathode matrix surface, described
Outside the rectilinear stretching cathode matrix of second end；The diaphragm is the composite membrane of three-decker, including is located in the middle polyethylene layer
With two polypropylene layers for being compound in the polyethylene layer two sides.
As a preferred embodiment, the thickness of the polyethylene layer and polypropylene layer is 0.07-0.008mm.
As a preferred embodiment, the diaphragm be three-decker composite membrane, including be located in the middle polyethylene layer and
It is compound in two polypropylene layers on the polyethylene layer two sides.
As a preferred embodiment, the positive plate surface covers+PVDF layers of LiFePO4+ carbon black.
As a preferred embodiment, the negative electrode tab surface covers graphite+CMC+SBR layers.
As a preferred embodiment, the top of the lithium-ion electric core is equipped with upper isolation board, and bottom is equipped with lower isolation board.
As a preferred embodiment, the anode structure includes positive electrode substrate, high temperature gummed tape and plus plate current-collecting body, the anode
Matrix is the aluminium foil of 0.016mm thickness, which combines with the join domain of positive plate end, which is covered in
The bonding end of the surface middle part of plus plate current-collecting body, plus plate current-collecting body is fixed in positive electrode substrate, the high temperature gummed tape and anode collection
Fluid stretches out outside join domain, the high temperature gummed tape with a thickness of 0.05mm, which is aluminium strip, with a thickness of 0.1mm.
The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology
Known to scheme:
One, using the copper foil of 0.01mm thickness as cathode matrix, on the one hand, the conductivity of copper foil is more preferable, the mobile speed of current potential
Degree is fast, and another aspect cathode matrix is very thin, is compounded in negative electrode tab surface, not will increase the thickness of negative electrode tab substantially, be rolled into electricity
After core, battery core will not change in one end shape of cathode.In addition, select the nickel strap of 0.07mm thickness as negative current collector, due to
Thickness, which is enough to pull when supporting its Bending Processing, to be broken, and guarantee product quality.Using the conductive coating with bonding agent as
Connection medium between cathode matrix and negative current collector, does not influence conductive effect, and have binding function.And conduction applies
Layer be spacing be divided into multistage, the setting of noncontinuity can save raw material, save cost, and having in bonding process can be with
The space being flattened is further ensured that the planarization of battery core product shape.
Two, the diaphragm is the composite membrane of three-decker, including is located in the middle polyethylene layer and is compound in the polyethylene
Two polypropylene layers on layer two sides.This sandwich diaphragm mutually ties the laminating film of traditional single layer, and isolation effect is more preferable, avoids on the two poles of the earth
Active material directly contact and cause internal short-circuit of battery.Such sandwich diaphragm has the advantage that 1. ion permeabilities
Greatly, 2. mechanical strengths are appropriate, and 3. diaphragms are completely insulated, and 4. do not react with electrolyte and electrode.
Three, since positive electrode substrate is very thin, only 0.016mm is compounded on positive plate, not will increase anode substantially
The thickness of piece guarantees that the outer dimension of battery core is constant to will not form protrusion in the junction of anode structure after winding.It sets again
The high temperature gummed tape for setting 0.05mm thickness, when battery charging and discharging adstante febre, the high temperature gummed tape can protect very thin anode structure not by
Damage.And then the plus plate current-collecting body of 0.1mm thickness is formed in end, guarantee that battery charging and discharging meets high current demand.
For the structure feature and effect for more clearly illustrating the utility model, come with reference to the accompanying drawing with specific embodiment pair
The utility model is described in detail.
Detailed description of the invention
Fig. 1 is the lithium battery interior structural schematic diagram of the embodiment of the utility model.
Fig. 2 is the negative pole structure schematic diagram of the embodiment of the utility model.
Fig. 3 is the negative pole structure cross-sectional view of the embodiment of the utility model.
Fig. 4 is the anode structure schematic diagram of the embodiment of the utility model.
Fig. 5 is the anode structure cross-sectional view of the embodiment of the utility model.
Fig. 6 is the cross-sectional view of the diaphragm of the embodiment of the utility model.
Description of drawing identification:
10 ,+PVDF layers of positive plate 11, LiFePO4+ carbon black
12, anode structure 121, positive electrode substrate
122, high temperature gummed tape 123, plus plate current-collecting body
124, it is bonded end
20 ,+CMC+SBR layers of negative electrode tab 21, graphite
22, negative pole structure 221, cathode matrix
222, negative current collector 223, conductive coating
30, diaphragm 31, polyethylene layer
32, polypropylene layer 40, upper isolation board
50, lower isolation board 60, shell.
Specific embodiment
It please refers to shown in Fig. 1 to Fig. 6, it to be a kind of that show the specific structures of the preferred embodiment of the utility model
Lithium-ion electric cored structure, the lithium-ion electric core are to be covered to be shaped to cylindrical-shaped structure by positive plate 10 and negative electrode tab volume 20, it is described just
10 surface of pole piece covers LiFePO4+ carbon black+PVDF layer 11.20 surface of negative electrode tab covers graphite+CMC+SBR layer 21.This is just
It is spaced apart between pole piece 10 and negative electrode tab 20 with diaphragm 30, positive plate 10 connects anode structure 12, and negative electrode tab 20 connects negative polarity node
Structure 22.The top of the lithium-ion electric core is equipped with upper isolation board 40, and bottom is equipped with lower isolation board 50, coats shell 60 then at outside
Battery can be formed.
Wherein, the anode structure 12 includes positive electrode substrate 121, high temperature gummed tape 122 and plus plate current-collecting body 123, the anode
Matrix 121 is the aluminium foil of 0.016mm thickness, which combines with the join domain of 10 end of positive plate, the high-temp glue
The bonding end of the surface middle part for being covered in plus plate current-collecting body 123 with 122, plus plate current-collecting body 123 is fixed in positive electrode substrate 121,
The high temperature gummed tape 122 and plus plate current-collecting body 123 stretch out outside join domain, the high temperature gummed tape 122 with a thickness of 0.05mm, this is just
Pole collector 123 is aluminium strip, with a thickness of 0.1mm.Since positive electrode substrate 121 is very thin, only 0.016mm is compounded in just
On pole piece 10, the thickness of positive plate 10 not will increase substantially, to will not be formed in the junction of anode structure 12 after winding convex
It rises, guarantees that the outer dimension of battery core is constant.The high temperature gummed tape 122 of 0.05mm thickness is set again, when battery charging and discharging adstante febre, the height
Warm adhesive tape 122 can protect very thin anode structure 12 and not be damaged.And then the plus plate current-collecting body of 0.1mm thickness is formed in end
123, guarantee that battery charging and discharging meets high current demand.
The negative pole structure 22 includes cathode matrix 221 and negative current collector 222, which is 0.01mm thick
Copper foil, which is compound in the end of negative electrode tab 20, which is the nickel strap of 0.07mm thickness, cathode
Collector 222 has a first end and a second end, and being equipped with multistage to the first end surfaces spacing has the conductive coating with bonding agent
223, which is adhered to 221 surface of cathode matrix, outside the rectilinear stretching cathode matrix 221 of second end.Using
The copper foil of 0.01mm thickness is as cathode matrix 221, on the one hand, the conductivity of copper foil is more preferable, and current potential movement speed is fast, on the other hand
Cathode matrix 221 is very thin, is compounded in 20 surface of negative electrode tab, not will increase the thickness of negative electrode tab 20 substantially, after being rolled into battery core, electricity
Core will not change in one end shape of cathode.In addition, selecting the nickel strap of 0.07mm thickness as negative current collector 222, due to thickness
Being enough to pull when supporting its Bending Processing will not be broken, and guarantee product quality.By the conductive coating 223 with bonding agent as negative
Connection medium between pole matrix 221 and negative current collector 222, does not influence conductive effect, and have binding function.And it leads
Electrocoat 223 be spacing be divided into multistage, the setting of noncontinuity can save raw material, save cost.
The diaphragm 30 is the composite membrane of three-decker, including is located in the middle polyethylene layer 31 and is compound in the polyethylene
Two polypropylene layers 32 on 31 two sides of layer.In the present embodiment, the thickness of the polyethylene layer 31 and polypropylene layer 32 is 0.07-
0.008mm.This sandwich diaphragm mutually ties the laminating film of traditional single layer, and isolation effect is more preferable, avoids the active material on the two poles of the earth
It directly contacts and causes internal short-circuit of battery.Such sandwich diaphragm has the advantage that 1. ion permeabilities are big, 2. mechanicalnesses
Intensity is appropriate, and 3. diaphragms 30 are completely insulated, and 4. do not react with electrolyte and electrode.
The above descriptions are merely preferred embodiments of the present invention, not makees to the technical scope of the utility model
Any restrictions, therefore any trickle amendment made by the above technical examples according to the technical essence of the present invention, equivalent change
Change and modify, is still within the scope of the technical solutions of the present invention.
Claims (7)
1. a kind of lithium-ion electric cored structure, which is to be covered by positive plate (10) and negative electrode tab (20) volume and be shaped to cylinder
Shape structure is spaced apart between the positive plate and negative electrode tab with diaphragm (30), and positive plate connects anode structure (12), negative electrode tab connection
Negative pole structure (22), it is characterised in that: the negative pole structure (22) includes cathode matrix (221) and negative current collector (222), is somebody's turn to do
Cathode matrix (221) is the copper foil of 0.01mm thickness, which is compound in the end of negative electrode tab (20), the cathode collection
Fluid (222) is the nickel strap of 0.07mm thickness, and negative current collector (222) has a first end and a second end, the first end surfaces spacing
There is the conductive coating (223) with bonding agent equipped with multistage, which is adhered to cathode matrix (221) surface, institute
State the rectilinear stretching cathode matrix (221) of second end outside.
2. lithium-ion electric cored structure according to claim 1, it is characterised in that: the diaphragm (30) is answering for three-decker
Film is closed, including being located in the middle polyethylene layer (31) and being compound in two polypropylene layers (32) on polyethylene layer (31) two sides.
3. lithium-ion electric cored structure according to claim 2, it is characterised in that: the polyethylene layer (31) and polypropylene layer
(32) thickness is 0.07-0.008mm.
4. lithium-ion electric cored structure according to claim 1, it is characterised in that: positive plate (10) the surface covering
+ PVDF layers of LiFePO4+ carbon black (11).
5. lithium-ion electric cored structure according to claim 1, it is characterised in that: negative electrode tab (20) surface covers graphite
+ CMC+SBR layers (21).
6. lithium-ion electric cored structure according to claim 1, it is characterised in that: the top of the lithium-ion electric core is equipped with upper
Isolation board (40), bottom are equipped with lower isolation board (50).
7. lithium-ion electric cored structure according to claim 1, it is characterised in that: the anode structure (12) includes positive base
Body (121), high temperature gummed tape (122) and plus plate current-collecting body (123), the positive electrode substrate (121) are the aluminium foil of 0.016mm thickness, this is just
Pole matrix (121) is combined with the join domain of positive plate (10) end, which is covered in plus plate current-collecting body
(123) surface middle part, the bonding end of plus plate current-collecting body (123) are fixed on positive electrode substrate (121), the high temperature gummed tape
(122) and plus plate current-collecting body (123) stretch out join domain outside, the high temperature gummed tape (122) with a thickness of 0.05mm, the anode collection
Body (123) is aluminium strip, with a thickness of 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820852710.0U CN208315683U (en) | 2018-06-04 | 2018-06-04 | Lithium-ion electric cored structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820852710.0U CN208315683U (en) | 2018-06-04 | 2018-06-04 | Lithium-ion electric cored structure |
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| Publication Number | Publication Date |
|---|---|
| CN208315683U true CN208315683U (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820852710.0U Active CN208315683U (en) | 2018-06-04 | 2018-06-04 | Lithium-ion electric cored structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299920A (en) * | 2021-05-24 | 2021-08-24 | 合肥国轩高科动力能源有限公司 | Lithium battery roll core |
-
2018
- 2018-06-04 CN CN201820852710.0U patent/CN208315683U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299920A (en) * | 2021-05-24 | 2021-08-24 | 合肥国轩高科动力能源有限公司 | Lithium battery roll core |
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