CN208589491U - A kind of processing unit (plant) of battery pole piece - Google Patents
A kind of processing unit (plant) of battery pole piece Download PDFInfo
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- CN208589491U CN208589491U CN201821284785.XU CN201821284785U CN208589491U CN 208589491 U CN208589491 U CN 208589491U CN 201821284785 U CN201821284785 U CN 201821284785U CN 208589491 U CN208589491 U CN 208589491U
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- pole piece
- pressure
- plant
- processing unit
- sealing container
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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
Abstract
It, can be with the processing unit (plant) of the battery pole piece of uniform compaction pole piece the utility model discloses a kind of structure is simple；Pressure apparatus including sealing container, adjustable output pressure value for accommodating conducting pressure liquid and the hermetic bag for sealing pole piece, the hermetic bag is placed in sealing container, and the pressure apparatus can wait indirectly the pole piece in hydrostatic seals bag by the conducting pressure liquid of extruding sealing container；The device is easy to operate, and the method for processing battery pole of expansion rate after pole piece processing is effectively reduced.This battery pole piece processing unit (plant) structure is simple, using etc. static pressure carry out compacting pole piece, facilitate and carry out compacting pole piece, the expansion issues that pole piece occurs in the process of baking can be effectively reduced；Present apparatus handling ease can be effectively reduced the pole piece higher problem of expansion rate in process, can effectively improve battery capacity, have very big market efficiency.
Description
Technical field
The utility model relates to battery technology field more particularly to a kind of processing unit (plant)s of battery pole piece.
Background technique
Lithium ion battery is because have high-energy density, long circulation life, good mechanical performance and environmentally friendly
The advantages that, it is widely used in each consumer electronics product, various electric cars and wind and solar energy, various model plane, unmanned plane etc.
On power-equipment.In recent years, with the update of product and portability demand, the promotion of battery capacity is proposed higher
Demand, in the case where requiring most probably small size, capacity, therefore, it is necessary to improve the energy density of battery.
Currently, the method for promoting battery energy density has many aspects, 1) common thinking is mainly include the following types: improve
The compacted density of raw material can have more remaining spaces to carry out packing material, to improve the capacity of battery；2) battery is improved
Voltage improves the voltage of battery raw material, by the cladding and doping of raw material, improves the stability of raw material, cobalt acid lithium from
4.2V is promoted to 4.35V, and gram volume is promoted by 140mAh/g to 165mAh/g, voltage increase to 4.4V, and gram volume is reachable
To 172mAh/g；3) thickness for reducing substrate and diaphragm, improves space utilization rate.The above method is disadvantageous in that: 1)
Material compacted density is promoted, and the processing of the pole piece in later period is influenced, simultaneously because the promotion of compacted density, leads to the infiltration of electrolyte
Relatively difficult, the ownership decline of electrolyte causes cycle performance of battery bad；2) raising of material voltage, to the peace of material
Full performance has higher requirement；3) reduction of base material thickness brings certain difficulty to production and processing, the reduction of membrane thicknesses, directly
Connect the security performance for influencing battery.
In general, after pole piece roll-in, due to the high molecular polymer that binder is chain crosslinking, there is certain elasticity and tough
Property, currently used roll-in mode is rotated towards each other for the rollers of two rotations and is squeezed pole piece, since its contact surface is small, and roll-in
Time is shorter, and nipping process is moment completion, and stress when roll-in inside pole piece is caused to be unable to get release, after pole piece baking,
Its thickness has certain expansion rate, and the usually thickness swelling of anode is 7-10% in 2-3%, cathode thickness swelling, fills
After electricity, due to the insertion of lithium ion, expansion rate after cathode pole piece charging is in 15-20% or so, therefore the expansion rate of pole piece,
The final size of battery is seriously affected to a certain extent, causes the space utilization rate of battery to reduce, also so as to cause battery capacity
Higher design is not achieved, battery energy density is relatively low.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, it is simple to provide a kind of structure for the utility model, can be with uniform compaction
Pole piece reduces the processing unit (plant) of pole piece after-bake expansion.
The utility model solves technical solution used by its technical problem are as follows:
A kind of processing unit (plant) of battery pole piece, including sealing container, the adjustable output pressure for accommodating conducting pressure liquid
The pressure apparatus of force value and hermetic bag for sealing pole piece, the hermetic bag are placed in sealing container, the pressure dress
Set the pole piece that can be waited indirectly by the conducting pressure liquid of extruding sealing container in hydrostatic seals bag.
As an improvement of the above technical solution, the hermetic bag is made of PET.
As an improvement of the above technical solution, the pressure apparatus can gradually increase or reduce exported pressure value.
As an improvement of the above technical solution, the pole piece includes positive plate and negative electrode tab.
As an improvement of the above technical solution, the pressure apparatus is hydraulic cylinder or oil cylinder.
As an improvement of the above technical solution, the sealing container top is equipped with the installing port being put into convenient for hermetic bag, institute
Installing port is stated equipped with dismountable cover board.
As an improvement of the above technical solution, the sealing container is connected with relief valve.
As an improvement of the above technical solution, be equipped with pressure sensor in the sealing container, the pressure sensor with
Pressure apparatus connection.
The beneficial effects of the utility model have:
This battery pole piece processing unit (plant) structure is simple, using etc. static pressure carry out compacting pole piece, facilitate and carry out compacting pole piece, can
The expansion issues that pole piece occurs in the process of baking are effectively reduced；The present apparatus is easy to operate, handling ease, can effectively drop
The low pole piece higher problem of expansion rate in process, can effectively improve battery capacity, have very big market efficiency.
Detailed description of the invention
With reference to the accompanying drawing and specific embodiment the utility model is described in further detail, in which:
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the cross-sectional view of the utility model embodiment；
Fig. 3 is the structural schematic diagram of hermetic bag packaging pole piece in the utility model embodiment.
Specific embodiment
Referring to Fig. 1 to Fig. 3, a kind of processing unit (plant) of battery pole piece of the utility model, including for accommodating conducting pressure
The sealing container 1 of liquid, the pressure apparatus 2 of adjustable output pressure value and the hermetic bag 3 for sealing pole piece 4, the sealing
Bag 3 is placed in sealing container 1, and the pressure apparatus 2 can wait indirectly static pressure by squeezing the conducting pressure liquid of sealing container 1
Pole piece 4 in hermetic bag 3.Wherein the hermetic bag 3 is made of PET, and hermetic bag 3 is equipped with package mouth easy to disassemble, facilitates behaviour
Make personnel and picks and places pole piece 4.Carrying out production hermetic bag 3 using PET has good mechanical property, and impact strength is ordinary packing film
3-5 times, in addition, PET is low for gas and vapor permeability, there is excellent resistance gas and water, oil and peculiar smell performance, especially
It is adapted to sealing pole piece 4.
In this application, sealing container 1 can closed space can high voltage bearing container, such as pressed in hydraulic press
Force container is not described in detail here.The pressure apparatus 2 is hydraulic cylinder or oil cylinder, can also be the similar power that can increase and decrease pressure
Mechanism is not limited to the above example herein, and the pressure apparatus 2 can gradually increase or reduce exported pressure value, can be with
Exported pressure value can be promoted according to the ascending order or descending of regulation by being interpreted as pressure apparatus 2, be set using such
Counting benefit is to facilitate control pressure, allows pole piece 4 that can gradually adapt to pressure, unexpected transition pressure change is avoided to cause in pole piece 4
Portion's stress is excessive, causes to rupture or occur internal structure fracture.Wherein, pole piece 4 includes positive plate and bears in the utility model
Pole piece.In addition, in order to enable conveniently, dispenser can be arranged in sealing container 1 in hermetic bag 3 and the pick-and-place of pole piece 4.
The present apparatus is equipped with the installing port being put into convenient for hermetic bag on 1 top of sealing container, and the installing port is equipped with
Dismountable cover board facilitates and check the situation in sealing container 1, convenient to overhaul.In addition, the sealing container 1 is connected with
Relief valve guarantees the safety of entire sealing container 1 when operation error.The present apparatus is equipped with pressure in the sealing container 1 and passes
Sensor, the pressure sensor are connect with pressure apparatus 2, are carried out its movement of induction control using pressure sensor, are realized automatic
Change compacting pole piece 4.
In addition, pole piece processing unit (plant) disclosed in the present application, the mode of operation for specifically processing pole piece is as follows, prepares pole first
The slurry of piece 4: by adhesive, active material and conductive black mix, be made slurry, wherein adhesive, active material and
The mass ratio of conductive black is 90-98.5:0.5-5:0.5-3, wherein can be divided into preparation anode and negative electrode slurry, wherein preparing just
Pole slurry: being that 90-98.5:0.5-3:0.5-3 mix by positive active material, adhesive and conductive black in mass ratio
To anode sizing agent, wherein positive active material is in cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate and LiFePO4
One or more mixtures；It prepares negative electrode slurry: being in mass ratio 90-97 by negative electrode active material, adhesive and conductive black:
1-5:1-3 carries out being mixed to get negative electrode slurry, and wherein negative electrode active material is graphite, lithium titanate, silicon-carbon cathode and alloy anode
In it is one or more.The production of two kinds of slurries, using conventional batteries produce in positive and negative slurry hybrid mode, this is practical new
Type will herein be described in detail；Then be coated: on a current collector by slurry coating obtained in above, dry slurry obtains pole
Piece 4；Then, the static pressure pole piece 4 such as general: coated pole piece 4 is put into hermetic bag 3, seals hermetic bag 3；It is close by what is be sealed
Envelope 3 is simultaneously put into the sealing container 1 equipped with conducting pressure liquid, pressure apparatus 2 cooperate sealing container 1 to hermetic bag 3 into
The static pressure such as row, until pole piece 4 reaches preset thickness；Concrete operations are that coated pole piece 4 is put into hermetic bag 3, are sealed
Hermetic bag 3；It by the hermetic bag 3 being sealed and is put into sealing container 1, conducting pressure liquid is injected into sealing container 1；Pressure
Device 2 gradually promotes the pressure of application to sealing container 1, and promotion rate is 0-9.8MPa/min, pressure limit 0-490MPa,
After pressure value reaches preset peak, pressure maintaining 0-100s, preferably 30-50s, until pole piece 4 reaches preset thickness；Wait protect
After pressure, pressure apparatus 2 carries out nature pressure release to sealing container 1 or is that 0-9.8MPa/min carries out pressure release by rate of pressure reduction,
Until pressure apparatus 2 is 0 to 1 pressure of sealing container.Using above-mentioned operating method, pole piece 4 can be effectively realized adaptively
It is pressed, due to using equal static pressure, so the suffered pressure at each position of pole piece 4 is relatively uniform, compared with conventionally employed roller
The mode of pressure carries out processing pole piece 4, and the internal stress inside pole piece 4 can be effectively reduced, and reduces swollen in after-bake process
Bulk, and then improve the capacity of battery after assembling.Wherein, in the present embodiment, in order to reduce cost using nature pressure release
Mode.And every primary progress pressure maintaining of boosting is for a period of time, and pole piece 4 can be allowed adapt to the pressure in the stage, improves 4 quilt of pole piece
The stability of compacting, while the pressure for eliminating internal each position is uneven, the pressure that pole piece 4 is received is uniform, answers in elimination
Power.In addition, pressure maintaining prevents pressure change from pole piece 4 being caused slight crack occur and goes out still in order to allow pole piece 4 to adapt to the variation of pressure
It is existing.In addition, the present apparatus can also carry out following operation to pole piece 4: coated pole piece 4 being put into hermetic bag 3, is sealed close
Envelope 3；It by the hermetic bag 3 being sealed and is put into sealing container 1, conducting pressure liquid is injected into sealing container 1；Pressure dress
Set the pressure that 2 pairs of sealing containers 1 gradually promote application, promotion rate is 0-9.8MPa/min, pressure limit 0-490MPa, often
9.8MPa/min pressure maintaining 0-100s, preferably 30-50s are promoted, until pole piece 4 reaches preset thickness；After pressure maintaining, pressure
Device 2 carries out nature pressure release to sealing container 1 or is that 0-9.8MPa/min carries out pressure release by rate of pressure reduction, until pressure apparatus 2
It is 0 to 1 pressure of sealing container.In this embodiment, it is depressured using stage, is to allow 4 energy of pole piece as boosting
The variation for adapting to pressure, prevents pressure change from pole piece 4 being caused slight crack appearance occur.
It also needs to be toasted after suppressing pole piece 4: slice is toasted, toasted 24 hours in vacuum oven, vacuum
Degree is not less than -0.08MPa, and baking temperature is 90-100 DEG C, baking time 6-10h, primary every ventilation in 2 hours, after ventilation
1-2min is kept, is then vacuumized again, after baking, stops heat preservation and cooled to room temperature；By the pole piece 4 after baking
It successively carries out tab welding, winding, encapsulation, fluid injection and chemical synthesis technology and is assembled into battery.The step and traditional battery assembly
Technique is the same, is not described in detail here.
This battery pole piece processing unit (plant) structure is simple, using etc. static pressure carry out compacting pole piece 4, facilitate carry out compacting pole piece 4,
The expansion issues that pole piece 4 occurs in the process of baking can be effectively reduced；The present apparatus is easy to operate, handling ease, Ke Yiyou
Effect reduces the higher problem of expansion rate in process of pole piece 4, can effectively improve battery capacity, imitates with very big market
Benefit.
The above, the only better embodiment of the utility model, but the utility model is not limited to above-mentioned reality
Example is applied, as long as its technical effect for reaching the utility model with any same or similar means, all should belong to the utility model
Protection scope.
Claims (8)
1. a kind of processing unit (plant) of battery pole piece, it is characterised in that: including the sealing container for accommodating conducting pressure liquid
(1), the pressure apparatus (2) of adjustable output pressure value and the hermetic bag (3) for sealing pole piece (4), the hermetic bag (3) are put
It sets in sealing container (1), the pressure apparatus (2) can be indirect etc. quiet by squeezing the conducting pressure liquid of sealing container (1)
Pole piece (4) in densification envelope (3).
2. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: the hermetic bag (3) is by PET
It is made.
3. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: the pressure apparatus (2) can
Gradually increase or reduce exported pressure value.
4. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: the pole piece (4) includes just
Pole piece and negative electrode tab.
5. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: the pressure apparatus (2) is
Hydraulic cylinder or oil cylinder.
6. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: on the sealing container (1)
Portion is equipped with the installing port being put into convenient for hermetic bag (3), and the installing port is equipped with dismountable cover board.
7. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: the sealing container (1) is even
It is connected to relief valve.
8. a kind of processing unit (plant) of battery pole piece according to claim 1, it is characterised in that: in the sealing container (1)
Equipped with pressure sensor, the pressure sensor is connect with pressure apparatus (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821284785.XU CN208589491U (en) | 2018-08-09 | 2018-08-09 | A kind of processing unit (plant) of battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821284785.XU CN208589491U (en) | 2018-08-09 | 2018-08-09 | A kind of processing unit (plant) of battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208589491U true CN208589491U (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821284785.XU Active CN208589491U (en) | 2018-08-09 | 2018-08-09 | A kind of processing unit (plant) of battery pole piece |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244372A (en) * | 2018-08-09 | 2019-01-18 | 珠海吉达讯储能技术研究院有限公司 | A kind of processing unit (plant) and method of battery pole piece |
-
2018
- 2018-08-09 CN CN201821284785.XU patent/CN208589491U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244372A (en) * | 2018-08-09 | 2019-01-18 | 珠海吉达讯储能技术研究院有限公司 | A kind of processing unit (plant) and method of battery pole piece |
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