CN208062169U - A kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming - Google Patents
A kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming Download PDFInfo
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- CN208062169U CN208062169U CN201820049768.1U CN201820049768U CN208062169U CN 208062169 U CN208062169 U CN 208062169U CN 201820049768 U CN201820049768 U CN 201820049768U CN 208062169 U CN208062169 U CN 208062169U
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- pole piece
- battery pole
- main body
- lithium
- superheated steam
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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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Abstract
The uniform electrodes of lithium-ion batteries of excellent and pore-forming the utility model discloses a kind of caking property, including battery pole piece main body (1), the battery pole piece main body (1) includes collector (2), and one layer of active material dressing layer (3) has been respectively coated in the upper and lower surface of the collector (2)；The battery pole piece main body (1) is by flow of superheated steam and the processed pole piece of stream of hot air Hybrid Heating.Caking property disclosed by the utility model is excellent and the uniform electrodes of lithium-ion batteries of pore-forming, it can effectively increase the cohesive force of the active material on battery pole piece surface, and active material is enable to form uniform hole on battery pole piece surface, it substantially reduces battery pole piece dust pollution in process and improves electrolyte infiltration uniformity, and then ensure global reliability and the safety of battery product.
Description
Technical field
The utility model is related to battery technology field, a kind of uniform lithium ions of and pore-forming excellent more particularly to caking property
Battery pole piece.
Background technology
Currently, lithium ion battery have many advantages, such as it is higher than energy, recycle often, storage time it is long, not only just
It takes such as mobile phone, DV and laptop computer on formula electronic equipment to be used widely, and is widely used in electricity
In terms of the large and medium-sized electrical equipment such as electrical automobile, electric bicycle and electric tool, therefore to the performance requirement of lithium ion battery
It is higher and higher.
For the pole piece of lithium ion battery, in pole piece drying process, the caking property of surface reactive material be easy by
It influences, and evaporates the micropore of formation and uneven, influence pore-forming.Wherein, if on pole piece active material bad adhesion, that
, pole piece is easy picking in process, to generate dust foreign matter, can not only increase the cleaning difficulty of dust, waste is precious
The expensive production time, while in final prepared battery when carrying out charge and discharge, dust is also possible to pierce through diaphragm, leads to battery
Micro-short circuit and self discharge occurs.It, will if pore-forming is uneven in the drying process for the active material on battery pole piece surface
When so that battery pole piece being placed into inside battery, electrolyte non-wetting can be caused so that battery capacity is low, cycle life is poor,
Seriously affect global reliability and the safety of battery product.
Therefore, the active matter on battery pole piece surface can effectively be increased there is an urgent need to develop a kind of technology is gone out at present
The cohesive force of matter, and active material is enable to form uniform hole on battery pole piece surface, substantially reduce battery pole piece
Dust pollution in process and improve electrolyte and infiltrate uniformity, so ensure the global reliability of battery product with
And safety.
Utility model content
In view of this, the purpose of this utility model is to provide, a kind of caking property is excellent and the uniform lithium ion cell electrode of pore-forming
Piece, can effectively increase the cohesive force of the active material on battery pole piece surface, and enable active material in battery
Pole piece forms uniform hole, substantially reduces battery pole piece dust pollution in process and improves electrolyte leaching
Moisten uniformity, and then ensure global reliability and the safety of battery product, further promotes the cycle life of entire battery,
The market application prospect for being conducive to improve cell production companies product, is of great practical significance.
For this purpose, the utility model provides, a kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming, including electricity
Pond pole piece main body, the battery pole piece main body includes collector, and one layer of activity has been respectively coated in the upper and lower surface of the collector
Substance dressing layer；
The battery pole piece main body is by flow of superheated steam and the processed pole piece of stream of hot air Hybrid Heating.
Wherein, the battery pole piece main body is that the pole of flow of superheated steam heat treatment is realized by superheated steam baking oven
Piece.
Wherein, the superheated steam overtemperature formed in the superheated steam baking oven is 400 DEG C.
Wherein, the superheated steam oven interior includes multipair circular hole tuyere for heating, above and below each pair of circular hole tuyere
It is symmetrical arranged, position of the battery pole piece main body between each pair of circular hole tuyere.
Wherein, the battery pole piece main body is to first pass through superheated steam baking oven to carry out superheated steam pre-add heat treatment, then
Using the withering pole piece of hot-air in air oven.
Wherein, ranging from 60~150 DEG C of the hot air temperature formed in the air oven.
Wherein, include inside the air oven it is multipair it is for heating cross slit tuyere, above and below each pair of slit tuyere
It shifts to install, position of the battery pole piece main body between each pair of slit tuyere.
By the above technical solution provided by the utility model as it can be seen that compared with prior art, the utility model provides
A kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming, can effectively increase the active matter on battery pole piece surface
The cohesive force of matter, and active material is enable to form uniform hole on battery pole piece surface, substantially reduce battery pole piece
Dust pollution in process and improve electrolyte and infiltrate uniformity, so ensure the global reliability of battery product with
And safety, the cycle life of entire battery is further promoted, before the market application for being conducive to raising cell production companies product
Scape is of great practical significance.
Description of the drawings
Fig. 1 is that a kind of caking property provided by the utility model is excellent and the structure of the uniform electrodes of lithium-ion batteries of pore-forming is shown
Meaning schematic diagram；
Fig. 2 is that a kind of caking property provided by the utility model is excellent and the preparation work of the uniform electrodes of lithium-ion batteries of pore-forming
Make principle schematic；
A kind of caking property provided by the utility model is excellent and the uniform electrodes of lithium-ion batteries when institute of pore-forming to prepare by Fig. 3
The structural schematic diagram of the circular hole tuyere of use；
A kind of caking property provided by the utility model is excellent and the uniform electrodes of lithium-ion batteries when institute of pore-forming to prepare by Fig. 4
The structural schematic diagram of the slit tuyere of use；
In figure：1 is battery pole piece main body, and 2 be collector, and 3 be active material dressing layer, and 4 be flow of superheated steam, and 5 be heat
Air stream, 6 be superheated steam baking oven, and 7 be air oven, and 8 be circular hole tuyere, and 9 be slit tuyere.
Specific implementation mode
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and embodiment
The utility model is described in further detail.
Referring to Fig. 1 to Fig. 4, the utility model provides that a kind of caking property is excellent and the uniform lithium ion cell electrode of pore-forming
Piece, including battery pole piece main body 1, the battery pole piece main body 1 include collector 2, and the upper and lower surface of the collector 2 applies respectively
It is covered with one layer of active material dressing layer 3；
The battery pole piece main body 1 is by flow of superheated steam 4 and the processed pole piece of 5 Hybrid Heating of stream of hot air.
It should be noted that for the utility model, the battery pole piece main body 1 is empty by flow of superheated steam 4 and heat
After 5 Hybrid Heating of air-flow is dried, the caking property of active material dressing 3 thereon is excellent, and is formed after evaporation uniform
Micropore (i.e. pore-forming is uniform).
In specific implementation, the battery pole piece main body 1 can be positive plate or negative plate.
In the present invention, in specific implementation, the battery pole piece main body 1 is realized by superheated steam baking oven 6
The pole piece of flow of superheated steam heat treatment.
In specific implementation, the superheated steam overtemperature formed in the superheated steam baking oven 6 is 400 DEG C.
In specific implementation, 6 inside of the superheated steam baking oven includes multipair circular hole tuyere 8 for heating, each pair of circular hole
8 setting symmetrical above and below of tuyere, position of the battery pole piece main body 1 between each pair of circular hole tuyere 8.Therefore, the battery
Pole piece main body 1 can be evenly heated by the multipair circular hole tuyere 8.
In specific implementation, the battery pole piece main body 1 preferably first passes through superheated steam baking oven 6 and carries out superheated steam pre-add
Heat treatment and then the pole piece that processing (being specially completely dried processing) is dried using the hot-air in air oven 7.
In specific implementation, ranging from 60~150 DEG C of the hot air temperature of formation in the air oven 7.
In specific implementation, 7 inside of the air oven includes multipair slit tuyere 9 excessively for heating, each pair of slit
About 9 tuyere shifts to install, position of the battery pole piece main body 1 between each pair of slit tuyere 9.Therefore, the battery
Pole piece main body 1 can be evenly heated by the multipair slit tuyere 9.
It should be noted that for the utility model, the preparation method of the above electrodes of lithium-ion batteries is specific as follows：
The first step：Battery pole piece main body 1 is transported to superheated steam baking oven 6 under the hygrometric state state for completing coating by deflector roll
It is internal；
Second step：Inside the superheated steam baking oven 6, superheated steam preheating is carried out to the battery pole piece main body 1,
Flow of superheated steam 4 uniformly penetrates active material dressing layer 3 by the circular hole tuyere 8, obtains the inside and outside of active material dressing layer 3
The almost the same battery pole piece main body 1 of temperature gradient；
Third walks：It completes to do in the inside that the battery pole piece main body 1 that preheating finishes is transported to the air oven 7
Dry, stream of hot air 4 uniformly blows to the surface layer of active material dressing layer by the slit tuyere 9, since pre- heat effect is not present
Internal and external temperature gradient, active material surface and internal evaporation efficiency difference are little, and drying efficiency is high, binder be evenly distributed not with
Solvent floats, and hot-air takes away evaporation solvent, the capillarity of the hole between active material by exhaust outlet so that internal
Solvent constantly floats up to active material dressing layer surface and is discharged with air-flow, and the caking property that active material is obtained after dry is excellent simultaneously
And the uniform battery pole piece main body 1 of pore-forming.
In the present invention, in the second step, the pre-add heat treatment is specific as follows：
Outside the superheated steam baking oven 6, steam boiler heating pure water forms saturation moist steam, saturation moist steam and sky
Gas is with certain volume ratio (such as 8:2) enter superheated steam generator continuous heating, form overtemperature (such as 400 DEG C)
It is saturated dry saturated steam, saturation dry saturated steam forms uniform flow of superheated steam 4 by the circular hole tuyere 8 so that the superheated steam
The uniformity of temperature profile of each position in baking oven 6, penetrates battery pole piece main body 1, inside and outside the 3 of active material dressing layer simultaneously
It is preheated.
In specific implementation, there are one steam boiler, two superheated steams to occur for the external setting of the superheated steam baking oven 6
Device, the air inlet of the superheated steam generator are communicated with the circular hole tuyere of the inside of the superheated steam baking oven 6, the overheat
One exhaust outlet of steam generator is vented using external exhaust fan.
In specific implementation, the battery pole piece main body 1 passes through the slit tuyere 9 that misplaces inside the air oven 7
Air quantity is adjusted, and is suspended in oven interior and is advanced wave upon wave in small.
In specific implementation, in order to avoid battery pole piece main body 1 is inside the superheated steam baking oven 6 and air oven 7
It can be in suspend to advance, avoid scratching, more transmission have been equidistantly positioned in the superheated steam baking oven 6 and air oven 7
Roller, height are slightly above the lower section circular hole tuyere 8 and slit tuyere 9.
It should be noted that the utility model can highly effective drying pole piece, have heating speed is fast, production efficiency is high, viscous
The features such as knot agent surface is not concentrated, pore-forming is uniform.Pole piece is entered the first warm area of drying area and is preheated using superheated steam, and overheat is steamed
Vapour penetrates pole piece active material, and identical temperature gradient section is substantially at from collector to active material surface layer.After second warm area
All using traditional Hot-blast Heating, after preheating fully, hot wind is blown to pole piece, and evaporation of the solvent forms uniform micropore, bonds
Power is uniformly distributed, and improves the cohesive force and wetting property of pole piece.
For the utility model, the cohesive force of pole piece can be improved as far as possible.It should be noted that it is viscous to improve pole piece
It ties power to need slowly to dry, binder is evenly distributed in slurry, does not float with evaporation of the solvent, material pore-forming is equal in drying process
It is even, it is conducive to battery electrical property, surface is not crusted, flawless after drying.It requires in actual production, improves drying efficiency, improve
Production efficiency reduces energy consumption.Especially, it should be noted that if rapid solvent evaporation, will cause binder collector,
It floats to surface between active material, leads to that pore-forming is uneven, surface crust problems of crack.
It should be noted that liquid in the saturated condition is known as saturated liquid, corresponding steam is saturated vapor, but
It is, initially only wet saturated steam, dry saturated steam is only after the moisture evaporating completely in steam.From unsaturated steam to wet
Saturated vapor arrives the process of dry saturated steam again, and neat temperature does not increase, and dry saturated steam continues heating, and then temperature can rise,
As the steam of overheat.Superheated steam specific volume with higher temperature, higher heat and bigger compared with saturated vapor.It crosses
Hot steam heat transfer coefficient is big, and drying efficiency is high, sometimes up to 90%, and it is environmentally safe, without explosion danger on fire.
It should be noted that for battery pole piece, the prior art is generally adopted by traditional heated air drying method, then electricity
Drying forms hard shell to active material surface on the pole piece of pond at first, to which active material internal solvent can be hindered to evaporate.With it is existing
Technology compares, the mode that the utility model is heated by using the heating of superheated steam penetration with hot-air surface layer, to battery
Pole piece carries out combination drying processing, can timely and effectively improve cohesive force and pore-forming uniformity on battery pole piece.
It should also be noted that, the medium of superheat steam drying is steam, to battery pole piece carry out through heating without
Surface crust, dry environment no oxygen exist, and not will produce oxidation side reaction, to which drying quality is good.
In conclusion compared with prior art, a kind of caking property provided by the utility model is excellent and pore-forming is uniform
Electrodes of lithium-ion batteries can effectively increase the cohesive force of the active material on battery pole piece surface, and make active matter
Matter can form uniform hole on battery pole piece surface, substantially reduce battery pole piece dust pollution in process and
It improves electrolyte and infiltrates uniformity, and then ensure global reliability and the safety of battery product, further promote entire electricity
The cycle life in pond is conducive to the market application prospect for improving cell production companies product, is of great practical significance.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (7)
1. a kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming, which is characterized in that including battery pole piece main body
(1), the battery pole piece main body (1) includes collector (2), and one layer of work has been respectively coated in the upper and lower surface of the collector (2)
Property substance dressing layer (3)；
The battery pole piece main body (1) is by flow of superheated steam and the processed pole piece of stream of hot air Hybrid Heating.
2. electrodes of lithium-ion batteries as described in claim 1, which is characterized in that the battery pole piece main body (1) is to pass through
Hot steam baking oven (6) come realize flow of superheated steam heat treatment pole piece.
3. electrodes of lithium-ion batteries as claimed in claim 2, which is characterized in that formed in the superheated steam baking oven (6)
Superheated steam overtemperature is 400 DEG C.
4. electrodes of lithium-ion batteries as claimed in claim 2, which is characterized in that include inside the superheated steam baking oven (6)
Multipair circular hole tuyere (8) for heating, the setting symmetrical above and below of each pair of circular hole tuyere (8), the battery pole piece main body (1) are located at
Position between each pair of circular hole tuyere (8).
5. electrodes of lithium-ion batteries as described in claim 1, which is characterized in that the battery pole piece main body (1) is to first pass through
Superheated steam baking oven (6) carries out the heat treatment of superheated steam pre-add and then is done using the hot-air in air oven (7)
The pole piece of dry processing.
6. electrodes of lithium-ion batteries as claimed in claim 5, which is characterized in that the heat formed in the air oven (7)
Air temperature range is 60~150 DEG C.
7. electrodes of lithium-ion batteries as claimed in claim 5, which is characterized in that include more inside the air oven (7)
Slit tuyere (9) is crossed to for heating, each pair of slit tuyere (9) shifts to install up and down, and the battery pole piece main body (1) is located at
Position between each pair of slit tuyere (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820049768.1U CN208062169U (en) | 2018-01-12 | 2018-01-12 | A kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820049768.1U CN208062169U (en) | 2018-01-12 | 2018-01-12 | A kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208062169U true CN208062169U (en) | 2018-11-06 |
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ID=63994708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820049768.1U Active CN208062169U (en) | 2018-01-12 | 2018-01-12 | A kind of caking property is excellent and the uniform electrodes of lithium-ion batteries of pore-forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208062169U (en) |
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2018
- 2018-01-12 CN CN201820049768.1U patent/CN208062169U/en active Active
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