CN106482499B - Pole piece coil drying device and method - Google Patents
Pole piece coil drying device and method Download PDFInfo
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- CN106482499B CN106482499B CN201510546902.XA CN201510546902A CN106482499B CN 106482499 B CN106482499 B CN 106482499B CN 201510546902 A CN201510546902 A CN 201510546902A CN 106482499 B CN106482499 B CN 106482499B
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- pole piece
- coiled strip
- piece coiled
- dried
- heating plate
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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
The invention provides a pole piece coil drying device and method. Pole piece coil stock drying device includes: the box body is used for accommodating and supporting a pole piece coil stock to be dried; and the heating mechanism is used for heating and drying the pole piece coil stock to be dried. The heating mechanism comprises a power supply, is arranged outside the box body and is electrically connected with the starting end and the tail end of the current collector, so that resistance type heating drying is carried out on the pole piece coil stock to be dried through the conduction of the current collector when the power supply is electrified. The pole piece coil drying method comprises the following steps: putting a pole piece coil stock into a box body of the pole piece coil stock drying device according to the first aspect of the invention; and electrically connecting the positive electrode of the power supply with one end of the starting end and the tail end of the current collector of the pole piece coil to be dried, electrically connecting the negative electrode of the power supply with the other end of the starting end and the tail end of the current collector of the pole piece coil to be dried, electrifying the power supply, and carrying out resistance type heating drying on the pole piece coil to be dried through the conduction of the current collector.
Description
Technical field
The present invention relates to pole piece coiled strip drying field more particularly to a kind of pole piece coiled strip drying device and methods.
Background technology
Lithium rechargeable battery because it is high, bigger than energy with voltage, have extended cycle life, have a safety feature, self discharge is small, work
Make wide range, memory-less effect and it is environmentally protective many advantages, such as, be widely used in portable electronic products and new energy and handed over
Logical tool.With the appearance of new-energy automobile support policy, lithium-ion-power cell industry Fast Growth, promoted production capacity at
For the hot spot of industry, and the drying process of electrode material is to promoting production capacity important role.
The drying of electrode material is broadly divided into two kinds at present：Pole piece coiling be incorporated at naked battery core the core after shell it is dry and
It is cold-pressed the coiled strip drying after simultaneously slitting is complete.Core drying is universal first to use heat radiation mode of heating to heat core, then ties again
It closes low vacuum to be dried in vacuo, also first heat exchange pattern can be used to heat core, then be carried out in conjunction with middle vacuum condition
Vacuum drying；Coiled strip drying has a uncoiling drying and entire volume drying, and uncoiling drying causes lug damage, coiled strip broken belt, infrared because easy
The factors such as fluorescent tube is of high cost constrain its large-scale application.And coiled strip drying (refer generally to entire volume drying) mainly using heat radiation and
The mode of hot air circulation is heated, and for the smaller coiled strip of width, radiant heating effect is fine, but for lithium ion power
For battery coiled strip, web width is big, and the efficiency of heating surface, which lowly becomes, restricts the bottleneck that its efficiency of heating surface is promoted.
A kind of vacuum drying oven is disclosed in the Chinese patent literature CN103836886A that on June 4th, 2014 announces, heat
Radiation and hot air circulation heat coiled strip, then carry out nitrogen type of respiration vacuum drying.Because of the volume of lithium-ion-power cell
Expect wider width, heating time is 10H~20H, so the efficiency of heat radiation mode of heating is low, and the outer layer material of its coiled strip
Material is first heated, and then transfers heat to inside coiled strip in layer, and for the coiled strip of large winding diameter, Temperature Distribution difference is up to 10~15
DEG C, this necessarily causes drying effect undesirable, the final consistency for influencing battery performance.In addition, hot air circulation and nitrogen breathing
Mode easily introduces dust to coiled strip, and certain hidden danger is also brought to lithium ion battery safety performance.
A kind of lithium rechargeable battery is disclosed in the Chinese patent literature CN102147185A announced on the 10th of August in 2011
Then the drying means of pole piece heats 2~10H wherein being first evacuated to -0.1MPa, then carry out inert gas breathing drying, at
This height.The coiled strip efficiency of heating surface is slow, and breathing drying cost is high and easily introduces dust to coiled strip, is easy to the safety of lithium ion battery
Certain hidden danger can be brought.
Invention content
The problem of in view of background technology, the purpose of the present invention is to provide a kind of pole piece coiled strip drying device and sides
Method can improve the efficiency of heating surface, reduce heating time, reduce cost, and improve the uniformity of pole piece roll material Temperature Distribution.
To achieve the goals above, in a first aspect, the present invention provides a kind of pole piece coiled strip drying devices comprising：
Babinet accommodates and supports pole piece coiled strip to be dried；And heating mechanism, it is dry for carrying out heating to pole piece coiled strip to be dried
It is dry.
Heating mechanism includes power supply, is set to outside babinet, the positive starting with the collector of pole piece coiled strip to be dried
End and end in one end be electrically connected and cathode with it is another in the initiating terminal and end of the collector of pole piece coiled strip to be dried
End electrical connection, it is dry to carry out resistance-type heating to pole piece coiled strip to be dried by the conduction of collector when power supply is powered
It is dry.
To achieve the goals above, in second aspect, the present invention provides a kind of pole piece coiled strip drying means comprising step
Suddenly：Pole piece coiled strip is put into the babinet of the pole piece coiled strip drying device described according to a first aspect of the present invention；Just by power supply
Pole is electrically connected with one end in the initiating terminal and end of the collector of pole piece coiled strip to be dried, by the cathode of power supply with it is to be dried
Pole piece coiled strip collector initiating terminal and end in the other end electrical connection, power supply be powered and by the conduction of collector
Resistance-type heat drying is carried out to pole piece coiled strip to be dried.
Beneficial effects of the present invention are as follows：
In pole piece coiled strip drying device according to the present invention and method, anode and the pole piece coiled strip to be dried of power supply
One end electrical connection in the initiating terminal and end of collector and the initiating terminal of the collector of cathode and pole piece coiled strip to be dried and
Other end electrical connection in end, when power supply is connected, electric current is formed into a loop via the initiating terminal of collector and end with power supply, into
And resistance-type heat drying is carried out to pole piece coiled strip to be dried, due to being resistance-type heat drying, so pole piece coiled strip is each
Volume layer reduces heating time by heat drying to improve the efficiency of heating surface simultaneously, reduces cost, and improve pole piece roll
Expect the uniformity of Temperature Distribution.
Description of the drawings
Fig. 1 is the front view according to the pole piece coiled strip drying device of the present invention.
Fig. 2 is the sectional view that A-A is splitted along Fig. 1.
Wherein, the reference numerals are as follows：
1 babinet, 5 vacuum device
2 heating mechanism, 51 exhaust pipe
21 power supply, 52 vacuum pump
22 anode 53 extraction valves of conducting wire
23 anode 6 gas transmission mechanisms of conductive chuck
24 cathode, 61 air source of conducting wire
25 cathode, 62 air delivering pipeline of conductive chuck
26 heating plate, 63 filter screen
27 heating controller, 64 gas valve
3 coiled strip supporting rod P lugs
4 reel S pole piece coiled strips
Specific implementation mode
Carry out the pole piece coiled strip drying device and method that the present invention will be described in detail with reference to the accompanying drawings.
Illustrate pole piece coiled strip drying device according to a first aspect of the present invention first.
Referring to Figures 1 and 2, pole piece coiled strip drying device according to the present invention includes：Babinet 1 is accommodated and is supported to be dried
Pole piece coiled strip S；And heating mechanism 2, for being thermally dried to pole piece coiled strip S to be dried.
Heating mechanism 2 includes power supply 21, is set to outside babinet 1, the collector of positive and to be dried pole piece coiled strip S
One end electrical connection in initiating terminal and end and in the initiating terminal and end of the collector of cathode and pole piece coiled strip S to be dried
The other end is electrically connected, to carry out resistance-type to pole piece coiled strip S to be dried by the conduction of collector when power supply 21 is powered
Heat drying.
In pole piece coiled strip drying device according to the present invention, the collection of the anode and pole piece coiled strip S to be dried of power supply 21
One end in the initiating terminal and end of fluid is electrically connected and initiating terminal and end of the cathode with the collector of pole piece coiled strip S to be dried
Other end electrical connection in end, when power supply 21 is connected, electric current is formed into a loop via the initiating terminal of collector and end with power supply 21,
And then resistance-type heat drying is carried out to pole piece coiled strip S to be dried, due to being resistance-type heat drying, so pole piece coiled strip S
Each volume layer heating time reduced to improve the efficiency of heating surface by heat drying simultaneously, reduce cost, and improve pole
The uniformity of piece coiled strip S Temperature Distributions.
In pole piece coiled strip drying device according to the present invention, referring to Figures 1 and 2, in one embodiment, babinet 1 can be
Cuboid.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, power supply 21 can be direct current
Power supply 21.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, the anode of power supply 21 is even
It is connected to the anode conducting wire 22 and the anode being electrically connected with anode conducting wire 22 conductive chuck 23 across babinet 1, anode is used
Conductive chuck 23 is electrically connected with one end in the initiating terminal and end of the collector of pole piece coiled strip S to be dried；Power supply 21 is born
Pole is connected with cathode conducting wire 24 and the cathode being electrically connected with cathode conducting wire 24 conductive chuck 25 across babinet 1, bears
Pole is electrically connected with conductive chuck 25 with the other end in the initiating terminal and end of the collector of pole piece coiled strip S to be dried.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, anode conductive chuck
23 are electrically connected with the lug P of the at one end in the initiating terminal and end of the collector of pole piece coiled strip S to be dried；Cathode is conductive
Collet 25 is electrically connected with the lug P at the other end in the initiating terminal and end of the collector of pole piece coiled strip S to be dried.Anode
It can be with lug P Rapid contacts and fixation with conductive chuck 23 and cathode conductive chuck 25.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, heating mechanism 2 can also wrap
It includes：Heating plate 26 is set to for the hollow cylinder with internal closed space in babinet 1, pole piece coiled strip S supports to be dried
And be housed in the internal closed space of heating plate 26 (in other words, pole piece coiled strip S to be dried via heating plate 26 inside
Enclosure space and be contained in babinet 1), with by heating plate 26 from external radiation heat drying；And heating controller 27, setting
It outside babinet 1, is electrically connected with heating plate 26, to control the heating of heating plate 26.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, heating plate 26 can be sky
Heart cylinder, axial two end faces of heating plate 26 are respectively for axial two end faces of pole piece coiled strip S, the inner circumferential of heating plate 26
Peripheral surface of the face towards pole piece coiled strip S.
In pole piece coiled strip drying device according to the present invention, referring to Figures 1 and 2, in one embodiment, pole piece coiled strip is dry
Dry device may also include coiled strip supporting rod 3, and in heating plate 26 and cantilever is connected to heating plate 26, and pole piece coiled strip S is fixed on
On coiled strip supporting rod 3, the peripheral surface of pole piece coiled strip S and axial both ends of the surface do not contact with heating plate 26.That is, pole piece roll
Expect the inner peripheral surface of peripheral surface and the heating plate 26 of S at a distance, axial two end faces and the heating plate 26 of pole piece coiled strip S
Axial inner ends face is at a distance.
In pole piece coiled strip drying device according to the present invention, referring to Figures 1 and 2, in one embodiment, pole piece coiled strip is dry
Dry device may also include reel 4, and pole piece coiled strip S is fixed on by reel 4 on coiled strip supporting rod 3.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, pole piece coiled strip drying dress
It sets and may also include vacuum device 5 and gas transmission mechanism 6.
Vacuum device 5 may include：Exhaust pipe 51 wears babinet 1 and heating plate 26 outside babinet 1 and stretches into heating plate
26 closed interior space；Vacuum pump 52 is set to outside babinet 1, and is communicated in one end of exhaust pipe 51；And extraction valve
53, it is set on exhaust pipe 51, and positioned at the upstream of vacuum pump 52.
Gas transmission mechanism 6 may include：Air source 61, provides dry gas；Air delivering pipeline 62 wears babinet 1 and is added outside babinet 1
Hot plate 26 and the closed interior space for stretching into heating plate 26, and it is communicated in air source 61；Filter screen 63 is set to air delivering pipeline 62
On；And gas valve 64, it is set on air delivering pipeline 62, and be located at 63 downstream of filter screen.Filter screen 63 can further decrease powder
Dirt risk promotes the security performance of battery.
In pole piece coiled strip drying device according to the present invention, pass through vacuum device 5 and gas transmission mechanism 6, nothing
The breathing drying that inert gas need to be used, to improve drying efficiency and reduce cost, while the air source 61 of gas transmission mechanism 6 is to adding
It is passed through dry gas in the internal closed space of hot plate 26, the risk for introducing dust to coiled strip can be avoided, improve the peace of battery
Full performance.
In pole piece coiled strip drying device according to the present invention, referring to Fig.1, in one embodiment, what gas transmission mechanism 6 inputted
Dry gas can be inert gas.
In pole piece coiled strip drying device according to the present invention, referring to Figures 1 and 2, in one embodiment, pole piece coiled strip S
Can be anode pole piece coiled strip or cathode pole piece coiled strip.
Secondly the pole piece coiled strip drying means of explanation according to a second aspect of the present invention.
Pole piece coiled strip drying means according to a second aspect of the present invention includes step：Pole piece coiled strip S is put into according to this hair
In the babinet 1 of pole piece coiled strip drying device described in bright first aspect；By the anode of power supply 21 with pole piece coiled strip S's to be dried
One end electrical connection in the initiating terminal and end of collector, by the collector of the cathode of power supply 21 and pole piece coiled strip S to be dried
Initiating terminal and end in the other end electrical connection, power supply 21 be powered and by the conduction of collector to pole piece roll to be dried
Expect that S carries out resistance-type heat drying.
In pole piece coiled strip drying means according to the present invention, when power supply 21 is connected, power supply 21 is done with pole piece coiled strip is put into
The collector of pole piece coiled strip S in dry device is formed into a loop, and resistance-type heating is carried out to pole piece coiled strip S to be dried using electric current
It is dry, due to being resistance-type heat drying, so each volume layer of pole piece coiled strip S heats simultaneously by heat drying to improve
Efficiency reduces heating time, reduces cost, and improves the uniformity of pole piece coiled strip S Temperature Distributions.
Further include step in pole piece coiled strip drying means according to the present invention：Pole piece coiled strip S internal temperatures reach target
Stop heating after temperature, heating plate 26 is to keep the temperature pole piece coiled strip S；Pass through vacuum device 5 during heat preservation
Vacuum pump 52 vacuumizes the internal closed space of heating plate 26, so that internal closed space reaches specified vacuum degree；
Under specified vacuum degree after the heat preservation and dryness stipulated time, the air source 61 of gas transmission mechanism 6 is into the internal closed space of heating plate 26
It is passed through dry gas, so as to restore to normal pressure, to complete drying in the internal closed space of heating plate 26；And take out pole piece roll
Expect S.The pole piece coiled strip drying means of the present invention is not necessarily to the breathing drying of inert gas, improves drying efficiency and reduces cost, together
When gas transmission mechanism 6 air source 61 be passed through dry gas into the internal closed space of heating plate 26, can avoid give coiled strip introduce
The risk of dust improves the security performance of battery.The reduction of heating time can also shorten total vacuum drying time, reduce technique at
This.
In pole piece coiled strip drying means according to the present invention, the target temperature that is heated inside pole piece coiled strip S is 80 DEG C~
150℃。
, it is specified that vacuum degree 0.1Pa~100Pa in pole piece coiled strip drying means according to the present invention.
Claims (10)
1. a kind of pole piece coiled strip drying device, pole piece coiled strip (S) has the diaphragm of collector and setting on a current collector, the pole
Piece coiled strip drying device includes：
Babinet (1) accommodates and supports pole piece coiled strip (S) to be dried；And
Heating mechanism (2), for being thermally dried to pole piece coiled strip (S) to be dried；
It is characterized in that, heating mechanism (2) includes：
Power supply (21) is set to babinet (1) outside, positive initiating terminal and end with the collector of pole piece coiled strip (S) to be dried
One end in end is electrically connected and cathode and the other end electricity in the initiating terminal and end of the collector of pole piece coiled strip (S) to be dried
Connection, to carry out resistance-type heating to pole piece coiled strip (S) to be dried by the conduction of collector when power supply (21) are powered
It is dry.
2. pole piece coiled strip drying device according to claim 1, which is characterized in that
The anode of power supply (21) is connected with across the anode conducting wire (22) of babinet (1) and is electrically connected with anode with conducting wire (22)
Anode with conductive chuck (23), the initiating terminal of positive conductive chuck (23) and the collector of pole piece coiled strip (S) to be dried
With one end electrical connection in end；
The cathode of power supply (21) is connected with across the cathode conducting wire (24) of babinet (1) and is electrically connected with cathode with conducting wire (24)
Cathode with conductive chuck (25), the initiating terminal of cathode conductive chuck (25) and the collector of pole piece coiled strip (S) to be dried
With the other end electrical connection in end.
3. pole piece coiled strip drying device according to claim 2, which is characterized in that
Positive conductive chuck (23) and the at one end in the initiating terminal and end of the collector of pole piece coiled strip (S) to be dried
Lug (P) is electrically connected；
At the other end in the initiating terminal and end of the collector of cathode conductive chuck (25) and pole piece coiled strip (S) to be dried
Lug (P) electrical connection.
4. pole piece coiled strip drying device according to claim 1, which is characterized in that heating mechanism (2) further includes：
Heating plate (26) is set to for the hollow cylinder with internal closed space in babinet (1), pole piece coiled strip to be dried
(S) support and be housed in the internal closed space of heating plate (26), with by heating plate (26) from external radiation heat drying；With
And
Heating controller (27) is set to babinet (1) outside, is electrically connected with heating plate (26), to control adding for heating plate (26)
Heat.
5. pole piece coiled strip drying device according to claim 4, which is characterized in that heating plate (26) is hollow cylinder,
Axial two end faces of heating plate (26) are respectively for axial two end faces of pole piece coiled strip (S), the inner peripheral surface of heating plate (26)
Peripheral surface towards pole piece coiled strip (S).
6. pole piece coiled strip drying device according to claim 1, which is characterized in that pole piece coiled strip drying device further includes：
Coiled strip supporting rod (3) is located in heating plate (26) and cantilever is connected to heating plate (26), and pole piece coiled strip (S) is fixed on volume
Expect on supporting rod (3), the peripheral surface of pole piece coiled strip (S) and axial both ends of the surface do not contact with heating plate (26).
7. pole piece coiled strip drying device according to claim 6, which is characterized in that pole piece coiled strip drying device further includes：
Reel (4), coiled strip are fixed on by reel (4) on coiled strip supporting rod (3).
8. pole piece coiled strip drying device according to claim 1, which is characterized in that pole piece coiled strip drying device further includes：
Vacuum device (5), including：
Exhaust pipe (51) wears babinet (1) and heating plate (26) and the closed interior for stretching into heating plate (26) outside from babinet (1)
Space；
Vacuum pump (52) is set to babinet (1) outside, and is communicated in one end of exhaust pipe (51)；And
Extraction valve (53) is set on exhaust pipe (51), and positioned at the upstream of vacuum pump (52)；
And
Gas transmission mechanism (6), including：
Air source (61), provides dry gas；
Air delivering pipeline (62) wears babinet (1) and heating plate (26) and the closed interior for stretching into heating plate (26) outside from babinet (1)
Space, and it is communicated in air source (61)；
Filter screen (63) is set on air delivering pipeline (62)；And
Gas valve (64) is set on air delivering pipeline (62), and is located at filter screen (63) downstream.
9. a kind of pole piece coiled strip drying means, which is characterized in that including step：
Pole piece coiled strip (S) is put into the babinet (1) of the pole piece coiled strip drying device according to any one of claim 1-8
It is interior；
The anode of power supply (21) is electrically connected with one end in the initiating terminal and end of the collector of pole piece coiled strip (S) to be dried
It connects, the cathode of power supply (21) and the other end in the initiating terminal and end of the collector of pole piece coiled strip (S) to be dried is electrically connected
It connects, power supply (21) is powered and carries out resistance-type heat drying to pole piece coiled strip (S) to be dried by the conduction of collector.
10. pole piece coiled strip drying means according to claim 9, which is characterized in that further include step：
Stop heating after pole piece coiled strip (S) internal temperature reaches target temperature, heating plate (26) is to carry out pole piece coiled strip (S)
Heat preservation；
The internal closed space of heating plate (26) is carried out by the vacuum pump (52) of vacuum device (5) during heat preservation
It vacuumizes, so that internal closed space reaches specified vacuum degree；
Under specified vacuum degree after the heat preservation and dryness stipulated time, the air source (61) of gas transmission mechanism (6) is to the interior of heating plate (26)
It is passed through dry gas in portion's enclosure space, so as to restore to normal pressure, to complete drying in the internal closed space of heating plate (26)；
And
Take out pole piece coiled strip (S).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546902.XA CN106482499B (en) | 2015-08-31 | 2015-08-31 | Pole piece coil drying device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546902.XA CN106482499B (en) | 2015-08-31 | 2015-08-31 | Pole piece coil drying device and method |
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| CN106482499A CN106482499A (en) | 2017-03-08 |
| CN106482499B true CN106482499B (en) | 2018-09-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108458553A (en) * | 2018-02-09 | 2018-08-28 | 湖南立方新能源科技有限责任公司 | A kind of lithium ion battery apparatus for baking and its baking method |
| CN108615950A (en) * | 2018-07-06 | 2018-10-02 | 江苏卓高新材料科技有限公司 | A kind of takeup type battery core method for shaping and shaping equipment |
| CN109186197A (en) * | 2018-08-14 | 2019-01-11 | 北京航天新风机械设备有限责任公司 | A kind of pole volume high-efficiency drying apparatus and its drying means |
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