CN208240791U - A kind of collector matrix for lithium ion battery - Google Patents
A kind of collector matrix for lithium ion battery Download PDFInfo
- Publication number
- CN208240791U CN208240791U CN201820525071.7U CN201820525071U CN208240791U CN 208240791 U CN208240791 U CN 208240791U CN 201820525071 U CN201820525071 U CN 201820525071U CN 208240791 U CN208240791 U CN 208240791U
- Authority
- CN
- China
- Prior art keywords
- recessed portion
- foil body
- lithium ion
- ion battery
- hole
- 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
Landscapes
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of collector matrixes for lithium ion battery, it include: foil body made of conductive material, foil body surface face is provided with multiple swaging portions of array arrangement, each swaging portion includes one being recessed by foil body side towards its another side and the first recessed portion formed and being reversely recessed the second recessed portion of formation by the bottom of first recessed portion, and the bottom of second recessed portion is provided with through-hole.The foil body surface face of the utility model is provided with multiple swaging portions, each swaging portion includes the first recessed portion and the second recessed portion, to form the foil body of a stereochemical structure, the stereochemical structure foil body can effectively catch the powder of expansion, it prevents powder and foil body to be detached from, improves the powder of brushing and the binding force of the foil body；The bottom of second recessed portion is provided with the through-hole through foil body two sides, alleviates the weight of the foil body, to alleviate the weight for the lithium ion battery produced with the foil body.
Description
Technical field
The utility model relates to technical field of lithium ion, more particularly, to a kind of collector for lithium ion battery
Matrix.
Background technique
As shown in Figure 1, currently, lithium ion battery mostly use metal aluminum foil, copper foil as anode, negative current collector matrix,
Pole piece is made by coating powder, collector matrix is two-dimension plane structure, and powder is not high with basal body binding force, and battery is discharging
It is detached from the process due to powder b expansion with matrix 01, to cause cell voltage quickly and reduce, the service life terminates in advance.
Utility model content
The purpose of the utility model is to overcome above-mentioned technical deficiencies, propose a kind of collector base for lithium ion battery
Body, solving collector matrix in the prior art is two-dimension plane structure, powder and the not high technical problem of basal body binding force.
To reach above-mentioned technical purpose, the technical solution of the utility model provides a kind of collector for lithium ion battery
Matrix, comprising: foil body made of conductive material, foil body surface face is provided with multiple swaging portions of array arrangement, each described
Swaging portion include one by foil body side be recessed towards its another side the first recessed portion formed and by described first it is recessed
The bottom of concave portion is reversely recessed the second recessed portion of formation, and the bottom of second recessed portion is provided with through foil body two sides
The through-hole in face.
Compared with prior art, the beneficial effects of the utility model include: the collector matrix for being used for lithium ion battery
Foil body surface face be provided with multiple swaging portions, each swaging portion includes the first recessed portion and the second recessed portion, thus shape
At the foil body of a stereochemical structure, which can effectively catch the powder of expansion, prevent powder and foil body to be detached from, improve
The binding force of the powder and the foil body brushed；The bottom of second recessed portion is provided with through foil body two sides
Through-hole, alleviates the overall weight of the foil body, to alleviate the weight for the lithium ion battery produced with the foil body.
Detailed description of the invention
Structural schematic diagram when Fig. 1 is former collector matrix coating powder.
Fig. 2 is the schematic elevation view of the utility model.
Partial enlargement diagram in Fig. 3 Fig. 2 at A.
Fig. 4 is the face B-B schematic cross-sectional view in Fig. 3.
Structural schematic diagram when Fig. 5 is Fig. 4 coating powder.
Fig. 6 is than energy result comparison chart.
Fig. 7 is discharge curve comparison chart.
Fig. 8 is constant current charge-discharge circulation comparison chart.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1~5 are please referred to, present embodiments provide a kind of collector matrix for lithium ion battery, comprising: conduction material
Foil body made of expecting, foil body surface face are provided with multiple swaging portions 1 of array arrangement, and each swaging portion 1 includes one
Be recessed by foil body side towards its another side the first recessed portion 11 formed and the bottom by first recessed portion 11
The second recessed portion 12 that reversed recess is formed, the bottom of second recessed portion 12 are provided with through the logical of foil body two sides
Hole 12a；This is used for the first recessed portion 11 and the second recessed portion 12 of the foil body surface face setting of the collector matrix of lithium ion battery,
So that the foil body has stereochemical structure, the foil body of the stereochemical structure can effectively catch the powder b of expansion, prevent powder b
It is detached from foil body, improves the powder b of brushing and the binding force of the foil body；The bottom of second recessed portion 12, which is provided with, to be passed through
The through-hole 12a for wearing foil body two sides, alleviate the overall weight of the foil body, is produced to alleviate with the foil body
The weight of lithium ion battery.
In the present embodiment, second recessed portion 12 is butt pyramid shape；The through-hole 12a is rectangular；Described second
The groove a formed between recessed portion 12 and first recessed portion 11 is frame shape, and the groove a can be clamped the powder expanded；
The side 111 of first recessed portion 11 is curved surface, and its subsequent corrosion is 10um, and the side 111 is relatively described recessed
The one side of slot a is convex globoidal；The bottom surface 112 of first recessed portion 11 is curved surface, and its subsequent corrosion is 8um, and described
The one side of the relatively described groove a in bottom surface 112 is convex globoidal；The diameter of the through-hole 12a is 50um × 100um；Described second is recessed
The diameter of the one end of concave portion 12 far from the through-hole 12a is 100um × 100um；The side and its bottom of first recessed portion 11
Face is smoothly connected by curved surface, and the subsequent corrosion of its connecting portion is 5um；Far from the through-hole on second recessed portion 12
One end of 12a and the underrun curved surface of first recessed portion 11 are smoothly connected, and the subsequent corrosion of its connecting portion is
2um。
For making the foil body of anode using aluminium foil in the present embodiment, the foil body with a thickness of 20um, institute
Stating porosity of the through-hole 12a on the foil body is 45%；The height of second recessed portion 12 is 100um；Using cobalt acid lithium: stone
Ink: binder (PVDF) be 94:3:3 ratio, by 46:54 solid-to-liquid ratio carry out slurrying, vacuum jitter time 4h~6h, later
The one side that slurry is uniformly coated the foil body by coating machine is first passed through, its another side is coated with after dry and is forming lithium ion just
Pole piece, roll-in after 130 DEG C of dryings of pole piece, with a thickness of 90um, density 3.6g/cm3.
For making the foil body of battery cathode using copper foil in the present embodiment, the foil body with a thickness of 10um, institute
Stating the logical hole 12a through-hole rate on the foil body is 35%；The height of second recessed portion 12 is 50um；Using graphite: bonding
Agent (PVDF) is the ratio of 97:3, carries out slurrying by the solid-to-liquid ratio of 56:44, vacuum jitter time 4h~6h first passes through painting later
The one side that slurry is uniformly coated the foil body by machine is covered, its another side is coated with after dry and forms lithium-ion negative pole piece, pole
Roll-in after 130 DEG C of dryings of piece, with a thickness of 60um, density 1.6g/cm3.
Positive plate described in the present embodiment, negative electrode tab are prepared into lithium-ion electric core using stacked flexible packing technique,
It is prepared into finished product 21Ah battery core after the common process such as being melted into, being aged, 25 DEG C of room temperature, 4.2A constant-current discharge, than can result
It compares as shown in Figure 6；25 DEG C of room temperature, 42A electric discharge, discharge curve are as shown in Figure 7；25 DEG C of room temperature, 21A constant current charge-discharge circulation
Test, test results are shown in figure 8, it can be seen that under battery core its 4.2A discharging condition using this patent design, than can be high
Up to 225wh/kg, and conventional aluminum foil current collector battery core ratio can only have 185wh/kg, and this patent will be higher by about 20%；Battery core 21A fills
During discharge cycles, collector battery core capacity keeps stablizing, and capacity still keeps 19.5Ah, conservation rate after 1800 circulations
90%；And conventional aluminum foil current collector battery core capacity is then decayed obviously, capacity only has 14Ah after 1800 circulations, and conservation rate is about
65%.
Work separate: the foil body surface face for being used for the collector matrix of lithium ion battery is provided with multiple swaging portions 1, each
The swaging portion 1 includes the first recessed portion 11 and the second recessed portion 12, so that the foil body of a stereochemical structure is formed, due to battery
The powder b that will lead to brushing during discharge is expanded, and the foil body of the stereochemical structure can effectively catch the powder b of expansion,
It prevents powder b and foil body to be detached from, improves the powder b of brushing and the binding force of the foil body, use the collection of the lithium ion battery
The performance of lithium ion battery made of fluid matrix has obtained significant optimization；The bottom of second recessed portion 12, which is provided with, to be passed through
The through-hole 12a for wearing foil body two sides, alleviate the overall weight of the foil body, is produced to alleviate with the foil body
The weight of lithium ion battery；Wherein, the through-hole 12a can also be round or quincunx.
Specific embodiment of the present utility model described above does not constitute the restriction to scope of protection of the utility model.
Any other various changes and modifications that any technical concept according to the present utility model is made should be included in practical
In novel scope of protection of the claims.
Claims (7)
1. a kind of collector matrix for lithium ion battery, comprising: foil body made of conductive material, the setting of foil body surface face
Have array arrange multiple swaging portions, each swaging portion include one by foil body side towards its another side be recessed
The first recessed portion for being formed and reversely it is recessed the second recessed portion of formation by the bottom of first recessed portion, second recess
The bottom in portion is provided with the through-hole through foil body two sides.
2. the collector matrix according to claim 1 for lithium ion battery, which is characterized in that second recessed portion
For butt pyramid shape；The through-hole is rectangular；The groove formed between second recessed portion and first recessed portion is
Frame shape.
3. the collector matrix according to claim 2 for lithium ion battery, which is characterized in that first recessed portion
Side be curved surface, and its subsequent corrosion be 10um；The bottom surface of first recessed portion is curved surface, and its subsequent corrosion is 8um；
The diameter of the through-hole is 50um × 100um；The diameter of the described one end of second recessed portion far from the through-hole be 100um ×
100um；The height of second recessed portion is 50-100um；The foil body with a thickness of 10um-20um.
4. the collector matrix according to claim 3 for lithium ion battery, which is characterized in that first recessed portion
Side be smoothly connected with its underrun curved surface, and the subsequent corrosion of its connecting portion be 5um.
5. the collector matrix according to claim 3 for lithium ion battery, which is characterized in that second recessed portion
The underrun curved surface of upper one end far from the through-hole and first recessed portion is smoothly connected, and the curved surface of its connecting portion
Radius is 2um.
6. the collector matrix according to claim 5 for lithium ion battery, which is characterized in that the through-hole is described
Porosity on foil body is 30%~65%.
7. the collector matrix according to claim 1 for lithium ion battery, which is characterized in that the through-hole is circle
Or it is quincunx.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820525071.7U CN208240791U (en) | 2018-04-13 | 2018-04-13 | A kind of collector matrix for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820525071.7U CN208240791U (en) | 2018-04-13 | 2018-04-13 | A kind of collector matrix for lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208240791U true CN208240791U (en) | 2018-12-14 |
Family
ID=64584185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820525071.7U Active CN208240791U (en) | 2018-04-13 | 2018-04-13 | A kind of collector matrix for lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208240791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525139A (en) * | 2020-04-09 | 2020-08-11 | 清华大学 | Graphite paper current collector, negative electrode and preparation method |
-
2018
- 2018-04-13 CN CN201820525071.7U patent/CN208240791U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525139A (en) * | 2020-04-09 | 2020-08-11 | 清华大学 | Graphite paper current collector, negative electrode and preparation method |
| CN111525139B (en) * | 2020-04-09 | 2021-08-17 | 清华大学 | Graphite paper current collector, negative electrode and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022143210A1 (en) | Electrode piece and battery | |
| CN100517852C (en) | A coiling lithium ion battery and its making method | |
| CN101877399A (en) | Preparation method of three-dimensional porous tin-copper alloy cathode materials for lithium ion battery | |
| CN207517535U (en) | A kind of cylindrical lithium ion capacitor | |
| CN104795534A (en) | Electrochemical cathode electrode, energy storage apparatus comprising cathode electrode and preparation method thereof | |
| CN104752752A (en) | Lithium ion battery naked cell and preparation method of lithium ion battery comprising naked cell | |
| CN207732007U (en) | Cathode pole piece and lithium ion battery | |
| CN207303231U (en) | A kind of graphene lithium-ion negative pole pole piece | |
| CN208240791U (en) | A kind of collector matrix for lithium ion battery | |
| CN112909262A (en) | Silicon cathode and preparation method and application thereof | |
| CN108899518B (en) | Flexible lithium stearate coated nano silicon composite material with shell-core structure and preparation and application thereof | |
| CN104882630A (en) | Bare electrical core of lithium ion battery, and preparation method for lithium ion battery containing bare electrical core | |
| CN109768224A (en) | A kind of preparation method based on growth in situ copper oxide/cobalt acid nickel nanowire composite negative electrode of lithium ion battery | |
| CN201773894U (en) | Special nickel hydroxide positive plate for SC type nickel-metal hydride batteries | |
| CN101620936A (en) | Lead dioxide/activated carbon mixed super capacitor | |
| CN113594537A (en) | Safety battery and preparation method thereof | |
| CN107181009B (en) | A kind of iron-nickel storage battery and preparation method thereof | |
| CN206059547U (en) | A kind of lithium ion battery structure of quickly-chargeable | |
| CN105552320B (en) | A kind of Ni-based Sn/SnO/SnO of foam2Three-dimensional porous negative electrode material of stratiform and preparation method thereof | |
| CN109065833B (en) | Surface treatment method for porous current collector of silicon-carbon composite negative plate of lithium battery | |
| CN111180730A (en) | Rapid charging and discharging graphene power lithium battery and preparation method thereof | |
| CN206293555U (en) | A kind of flexible package graphene lithium ion battery | |
| CN109860508A (en) | Preparation method, cathode pole piece and the lithium ion battery of lithium ion battery negative electrode | |
| CN103066256A (en) | Preparation method for nanometer copper-tin nickel alloy cathode material, nanometer copper-tin nickel alloy cathode material and lithium ion battery | |
| CN205828159U (en) | A kind of aluminium electrolutic capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |