CN201717310U

CN201717310U - Vacuum drying box of lithium ion battery pole piece coil

Info

Publication number: CN201717310U
Application number: CN2010202610752U
Authority: CN
Inventors: 邓梁
Original assignee: 赵宽; 邓昌沪
Priority date: 2010-07-06
Filing date: 2010-07-06
Publication date: 2011-01-19
Anticipated expiration: 2020-07-06

Abstract

The utility model discloses a vacuum drying box of a lithium ion battery pole piece coil which mainly comprises a box cover flange, a spiral annular runner jacket box body, a fan, a plunger spring, a sliding unit, a vacuum pump, a reducing motor, a screw handwheel, a lifting shaft, a lifting screw, a spiral annular rib vacuum cavity, a sliding guide pillar, a linear bearing, a guide pillar seat, an electric heating tube, a thrust bearing, a mechanical seal, a coupler, a base flange, a pole piece coil mesh plate seat, a lifting nut, etc. A horizontal suspension way is improved into a coaxial vertical way, which is beneficial for water transpiration according to the characteristic that the specific gravity of heated air is lighter and the heated air moves upwards. The insulating structure of the box body is changed; a spiral annular runner jacket is arranged between a vacuum cavity and a shell; when dying is completed, the fan at the inlet of the spiral annular runner blows air to the spiral annular runner to lead the air inside the spiral annular runner to compulsively convect with environment to quickly cool the vacuum cavity; meanwhile, when the vacuum cavity is cooled, the cooling condition of the pole piece coil is improved, the time for waiting for cooling is shortened and the production efficiency is improved.

Description

Electrodes of lithium-ion batteries volume vacuum drying chamber

Technical field

The present invention relates to the lithium ion battery manufacturing process technology, particularly electrodes of lithium-ion batteries volume vacuum drying chamber.

Background technology

The lithium ion battery manufacturing process is by a very important processing step, just be exactly, cathode size needs by the primary drying link after being coated on copper foil of affluxion body or aluminium foil surface, dry mass has crucial influence with the making battery product, existing technology is the volume of the pole piece after the coating to be passed volume heart through hole hang over vacuum and heating drying on the trunnion axis, the defective of this method is, the weight of pole piece volume all is pressed in the position that the pole piece volume contacts with trunnion axis, pressed the position of position and other suspension phenomenon that exists the gap not wait, the big position water evaporates in gap is easy, the position that compresses moisture under identical conditions is difficult to evaporation, it is poor that the result of final baking appears at the relatively good dry mass that has of dry mass that same volume pole piece material has, that is to say, the problem that always exists water content not wait in the same batch of material, what of water content will occur and the electrolyte result that reactions vary after fluid injection, cause the lithium ion battery homogeneity of product poor.

The existing pole piece volume mode that horizontally suspends also exists, the defective of thermodynamic principles, can prove from the evapotranspiration phenomenon, the heating power transpiration is a upstroke, and pole piece volume level is put, and transpiration of the steam of volume layer is horizontal movement in the middle of it, thermodynamic effect is not as rising upstroke like this, problems such as this just must cause drying time long, and power consumption is big, and device resource efficient is low.

In addition, its casing insulating of existing drying box is the fixed structure between vacuum chamber and shell, after finishing, baking needs to wait for that for a long time the temperature inside the box just can be reduced to normal temperature, that is to say, even, baking finishes, and powder still can not take out in drying box immediately, needs to wait for for a long time, cause hold facility chronic, the defective that service efficiency is low.

Summary of the invention

The present invention is directed to the defective that prior art exists, proposing a kind of improvement mode of horizontally suspending is axial vertical mode.

Improve the casing heat insulation structural, it between vacuum chamber and the shell helical annular runner chuck, the space of helical annular runner chuck, form closed chamber, make closed chamber and surrounding air convection current can not take place directly, play heat-blocking action, after finishing, drying passes through, the air blast of the porch of helical annular runner is to the air blast of helical annular runner, make in the helical annular runner air rapidly with the environment forced convertion, cooling vacuum chamber fast, the vacuum chamber cooling provides one to the pole piece volume simultaneously and has strengthened the condition of cooling off, time to be cooled, the purpose of enhancing productivity such as shortened.

Further, in order to guarantee the anti-rigidity that vacuumizes of vacuum chamber, vacuum chamber adopts the circumferential rib reinforced structure, the circumferential rib reinforced structure can be arranged at the radially helical annular of light-wall pipe, radially helical annular is arranged and has been reached helical annular flow passage structure purpose, because radially helical annular arranges that the circumferential rib reinforced structure has improved the rigidity property of vacuum chamber greatly, can adopt thin-walled material to make vacuum chamber after the rigidity property of vacuum chamber improves; it is little that thin-walled material making vacuum chamber has thermal capacity, uniformity of temperature profile also has the fine anti-rigidity that vacuumizes simultaneously.

The technical solution adopted for the present invention to solve the technical problems is, in order to meet the vertical position of pole piece volume formula drying, vacuum chamber is installed on the frame with axial manner, case lid door and base flange are installed in vacuum chamber two ends up and down respectively, in order to operate facility, lifting screw is set in vacuum chamber, the lifting nut that is enclosed within on the lifting screw can rotatablely move lifting at lifting screw, lifting nut will promote a porous web plate that holds the pole piece volume and do rising and descending motion, in order to improve the vacuum degree in the vacuum chamber, power imports into needs to adopt high-quality mechanical seal device, the mechanical seal device can adopt mechanical seal can select conventional rotating ring for use, stationary ring hermetically-sealed construction type products, or select the movable sealing of vacuum magnetic fluid for use, in order to improve equipment efficiency of usage, reach quick cooling purpose, outer wall at vacuum chamber is provided with the forced convertion air flue, by the outer wall air flue air blast of air blast to vacuum chamber, play the cooling effect of forced convertion, wait for casing and work-piece cools stand-by period thereby shorten.

Beneficial effect of the present invention: by the improvement mode of horizontally suspending is axial vertical mode drying, can avoid pole piece volume local compression to cause the phenomenon of dry mass inequality, improved the favourable raising electrodes of lithium-ion batteries volume of thermodynamic behaviour dry mass simultaneously, can improve the equipment service efficiency by improving the cabinet insulation radiator structure, reduce the hold facility cost.

Description of drawings

Fig. 1 is an electrodes of lithium-ion batteries volume vacuum drying chamber front view of the present invention;

Fig. 2 is an electrodes of lithium-ion batteries volume vacuum drying chamber body structure schematic diagram of the present invention;

Fig. 3 is an electrodes of lithium-ion batteries volume vacuum drying chamber helical annular runner chuck schematic diagram of the present invention;

Fig. 4 is the vertical view of electrodes of lithium-ion batteries volume vacuum drying chamber Fig. 1 of the present invention;

Fig. 5 is that existing pole piece volume drying process horizontal axis hangs schematic diagram;

Fig. 6 is that electrodes of lithium-ion batteries volume vacuum drying chamber pole piece of the present invention is rolled up dry vertical axial storing schematic diagram;

Among Fig. 1: case lid flange 1, helical annular runner chuck casing 2, air blast 3, exhaust outlet 4, baffle ring 5, plunger spring 6, sliding unit 7, vacuum hose 8, vacuum pump 9, vacuum battery valve 10, reducing motor 11, frame 12, handwheel screw 13, lifting shaft 14;

Among Fig. 2: baffle ring 5, plunger spring 6, sliding unit 7, lifting shaft 14, case lid flange 1, fagging 1-1 in the case lid flange, the cotton 1-2 of ceramic fibre, aluminium matter covering 1-3, lifting screw 2-1, helical annular rib vacuum chamber 2-2, slip guide pillar 2-3, linear bearing 2-4, guide pillar seat 2-5, electrothermal tube 2-6, thrust bearing 2-7, heat insulation rock wool 2-8, stainless steel covering 2-9, mechanical seal 2-10, reducing motor 11, shaft coupling 2-12, base flange 2-13, pole piece volume mesh panel seat 2-14, adapter sleeve 2-15, pole piece volume 2-16, lifting nut 2-17, helical annular rib vacuum accent end flanges 2-18, helical annular rib vacuum chamber bottom flange 2-19, helical annular rib vacuum chamber overcoat 2-20, reducing motor seat 2-21;

Among Fig. 3: air blast 3, exhaust outlet 4;

Among Fig. 4: case lid flange 1, sliding unit 7, handwheel screw 13;

Among Fig. 5: pole piece volume A, suspended axle B;

Among Fig. 6: pole piece volume 2-16, pole piece volume mesh panel seat 2-14;

Specific embodiments

With reference to Fig. 1,2 axial formulas of helical annular runner chuck casing are fixed on frame 12 tops, case lid 1 is fastened on helical annular runner chuck casing 2 radially with lifting shaft 14 upper ends, baffle ring 5 belows in lifting shaft 14 stage casings are plunger springs 6, sliding unit 7 is installed in the two ends of lifting shaft 14, the top of lifting shaft 14 is case lid flange 1 fixedly, the bleeding point of vacuum pump 9 by vacuum hose 8 link to each other with vacuum battery valve 10 with helical annular rib vacuum chamber 2-2 in connect, reducing motor 11 is installed in the bottom of helical annular runner chuck casing 2, in conjunction with Fig. 2, reducing motor 11 is connected with mechanical seal 2-10 by shaft coupling 2-12,2-21 fixes by the reducing motor seat, mechanical seal 2-10 is connected with adapter sleeve 2-15, adapter sleeve 2-15 is connected with lifting screw 2-1, lifting nut 2-17 is sleeved on radially thread segment of lifting screw 2-1, pole piece volume mesh panel seat 2-14 is enclosed within lifting nut 2-17 radially, the radially outer of pole piece volume mesh panel seat 2-14 is enclosed within on the linear bearing 2-4, linear bearing 2-4 is by slip guide pillar 2-3 suit, the bottom of slip guide pillar 2-3 is fixed on guide pillar seat 2-5 and is connected and fixed by base flange 2-13, pole piece volume 2-16 is seated on the pole piece volume mesh panel seat 2-14, electrothermal tube 2-6 is installed in the axial outside of base flange 2-13, the stuffed heat insulated rock wool 2-8 of the periphery of electrothermal tube 2-6 is fixed by stainless steel covering 2-9,4 handwheel screws 13 are with helical annular rib vacuum accent end flanges 2-18 and case lid flange 1 lock sealing of helical annular rib vacuum chamber 2-2, fill the cotton 1-2 of ceramic fibre in the case lid flange between fagging 1-1 and the aluminium matter covering 1-3, in conjunction with Fig. 3, helical annular rib vacuum chamber 2-2 and the tangent installation of helical annular rib vacuum chamber overcoat 2-20, the radially installation air blast 3 of helical annular rib vacuum chamber overcoat 2-20 and helical annular rib vacuum accent end flanges 2-18 adjacent, helical annular rib vacuum chamber overcoat 2-20 and helical annular rib vacuum chamber bottom flange 2-19 adjacent are installed exhaust outlet 4.

In order to alleviate pole piece volume 2-16 to the axial gravity of adapter sleeve 2-15, thrust bearing 2-7 is installed between adapter sleeve 2-15 and the base flange 2-13.

Using method: the handwheel screw 13 of outwarding winding, plunger spring 6 elastic reactions upwards push away baffle ring 5, lifting shaft 14 upward displacements, case lid flange 1 is brought to and moves simultaneously, to be the pivot rotation with lifting shaft 14, open wide helical annular rib vacuum chamber 2-2 top mouth, start reducing motor 11, lifting screw 2-1 is driven in rotation, lifting screw 2-1 rotation, lifting nut 2-17 rises, lifting nut 2-17 rises, pole piece volume mesh panel seat 2-14 is pushed to motion by lifting nut 2-17, until pole piece volume mesh panel seat 2-14 and helical annular rib vacuum chamber 2-2 top mouth, because 4 slip guide pillar 2-3 are right, pole piece is rolled up 2-16 to be placed on the pole piece volume mesh panel seat 2-14, make reducing motor 11 reverse, the descending original position of getting back to of lifting nut 2-17, close case lid flange 1 and screw helical annular rib vacuum accent end flanges 2-18 and case lid flange 1 lock sealing of handwheel screw 13 helical annular rib vacuum chamber 2-2, start electrothermal tube 2-6, heat is upwards rising, the temperature inside the box rises, pole piece volume 2-16 is heated, pole piece volume 2-16 place vertical axial, the vertical favourable moisture evaporated in volume lamellar spacing is upwards rising, start vacuum pump 9, the evaporating temperature of moisture reduces under the negative pressure, favourable moisture fully evaporates, after drying finishes, close vacuum pump 9, close electrothermal tube 2-6, start air blast 3, under air blast 3 forced convertions, helical annular rib vacuum chamber 2-2 cools off fast, after being cooled to normal temperature, the handwheel screw 13 of outwarding winding, plunger spring 6 elastic reactions upwards push away baffle ring 5, lifting shaft 14 upward displacements, case lid flange 1 is brought to and moves simultaneously, to be the pivot rotation with lifting shaft 14, open wide helical annular rib vacuum chamber 2-2 top mouth, start reducing motor 11, lifting screw 2-1 is driven in rotation, lifting screw 2-1 rotation, lifting nut 2-17 rises, and lifting nut 2-17 rises, and pole piece volume mesh panel seat 2-14 is pushed to motion by lifting nut 2-17, until pole piece volume mesh panel seat 2-14 and helical annular rib vacuum chamber 2-2 top mouth, pole piece is rolled up 2-16 take out.

Claims

1. one kind mainly by case lid flange (1), helical annular runner chuck casing (2), air blast (3), exhaust outlet (4), baffle ring (5), plunger spring (6), sliding unit (7), vacuum hose (8), vacuum pump (9), vacuum battery valve (10), reducing motor (11), frame (12), handwheel screw (13), lifting shaft (14), fagging (1-1) in the case lid flange, ceramic fibre cotton (1-2), aluminium matter covering (1-3), lifting screw (2-1), helical annular rib vacuum chamber (2-2), slip guide pillar (2-3), linear bearing (2-4), guide pillar seat (2-5), electrothermal tube (2-6), thrust bearing (2-7), mechanical seal (2-10), shaft coupling (2-12), base flange (2-13), pole piece volume mesh panel seat (2-14), adapter sleeve (2-15), lifting nut (2-17), helical annular rib vacuum accent end flanges (2-18), helical annular rib vacuum chamber bottom flange (2-19), helical annular rib vacuum chamber overcoat (2-20), the electrodes of lithium-ion batteries volume vacuum drying chamber that reducing motor seat (2-21) is formed, it is characterized in that helical annular runner chuck casing (2) axially position formula is fixed on frame (12) top.

2. by the described electrodes of lithium-ion batteries volume of claim 1 vacuum drying chamber, it is characterized in that, reducing motor (11), shaft coupling (2-12), mechanical seal (2-10), adapter sleeve (2-15), lifting screw (2-1) is linked in sequence, and lifting nut (2-17) is sleeved on radially thread segment of lifting screw (2-1).

3. by the described electrodes of lithium-ion batteries volume of claim 1 vacuum drying chamber, it is characterized in that thrust bearing (2-7) is installed between adapter sleeve (2-15) and the base flange (2-13).

4. by the described electrodes of lithium-ion batteries volume of claim 1 vacuum drying chamber, it is characterized in that electrothermal tube (2-6) is installed in the axial outside of base flange (2-13).

5. by the described electrodes of lithium-ion batteries volume of claim 1 vacuum drying chamber, it is characterized in that the radially installation air blast (3) of helical annular rib vacuum chamber overcoat (2-20) and helical annular rib vacuum accent end flanges (2-18) adjacent.

6. by the described electrodes of lithium-ion batteries volume of claim 1 vacuum drying chamber, it is characterized in that the radially outer of pole piece volume mesh panel seat (2-14) is enclosed within on the linear bearing (2-4), linear bearing (2-4) is by slip guide pillar (2-3) suit.