CN114754545B - Efficient drying process and device - Google Patents
Efficient drying process and device Download PDFInfo
- Publication number
- CN114754545B CN114754545B CN202210100238.6A CN202210100238A CN114754545B CN 114754545 B CN114754545 B CN 114754545B CN 202210100238 A CN202210100238 A CN 202210100238A CN 114754545 B CN114754545 B CN 114754545B
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- mesh tray
- bearing box
- baking
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- 238000001035 drying Methods 0.000 title claims abstract description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002245 particle Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/041—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying flowable materials, e.g. suspensions, bulk goods, in a continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
- F26B25/225—Controlling the drying process in dependence on liquid content of solid materials or objects by repeated or continuous weighing of the material or a sample thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/16—Drying solid materials or objects by processes not involving the application of heat by contact with sorbent bodies, e.g. absorbent mould; by admixture with sorbent materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a high-efficiency drying process and a device, which relate to the field of new energy batteries and comprise a bearing box, wherein a plurality of step fixing shafts are arranged at four corners of a box opening of the bearing box, fixing steps are arranged at the bottoms of the step fixing shafts, the step fixing shafts are inserted into the box opening of the bearing box through the fixing steps, a fine mesh tray and a fine mesh covering plate are sequentially arranged on the step fixing shafts from bottom to top, the fine mesh covering plate covers the fine mesh tray, an adsorbent is filled in an interval between the fine mesh tray and the fine mesh covering plate, fine mesh cleaning devices are further arranged at two sides of the fine mesh tray and are used for cleaning powder generated by pole pieces, and parts of the device designed in the invention are simple and easy to obtain, low in cost and environment-friendly; the used adsorbent is basically physical adsorption, can be recycled after being treated, and has low cost; the baking time required by baking through the device is obviously shortened, and the productivity is greatly improved; the storage pressure of the battery cells to be baked is remarkably reduced.
Description
Technical Field
The invention relates to the field of new energy batteries, in particular to a high-efficiency drying process and device.
Background
The lithium ion cell is a secondary cell capable of repeatedly charging and discharging, and is composed of cathode and anode pole pieces, isolating films, electrolyte, mechanical parts and the like. In the production of lithium ion cells, especially in research cell production and manufacturing processes, the water content of the bare cell needs to be strictly controlled before electrolyte is injected into the liquid lithium ion cell, so that a baking process is required. However, the contradiction between the baking process and the whole production process is that the baking process needs a long time and a short time, and needs 12 hours, some large cells are even 72 hours, and the cells may be mixed with powder falling off from the positive pole piece and the negative pole piece or residual methyl pyrrolidone in the pole piece. The usual baking process can have several unavoidable drawbacks:
1. the production efficiency of the battery cell is reduced;
2. the test of the long-time baking on the isolating film is increased, and the local heat is excessive, so that the isolating film can yellow or close holes, and the quality of the battery cell is seriously affected;
3. the storage pressure of the temporary storage area of the battery cell to be baked in the baking room is increased;
4. the quality control risk of the battery cells to be baked in the baking room in the storage process is increased.
Shortening baking time is one of the important technical goals within the enterprise.
Disclosure of Invention
The present invention is directed to a drying process and apparatus with high efficiency, which solve the above-mentioned drawbacks caused by the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an efficient drying process and device, includes bears the case, be provided with many step fixed axles on the case mouth four corners of bearing the case, the bottom of step fixed axle is equipped with fixed step, the step fixed axle inserts in the case mouth of bearing the case through fixed step, be equipped with fine mesh tray and fine mesh cover board from down in proper order on the step fixed axle, fine mesh cover board covers on the fine mesh tray, the interval intussuseption between the two packs the adsorbent, fine mesh tray both sides still be equipped with fine mesh cleaning device, fine mesh cleaning device is used for the powder that clean pole piece produced.
Preferably, the bearing box is provided with two different structures, namely a supporting frame and a supporting box.
Preferably, the step fixing shaft is respectively provided with a first step and a second step, the second step is located above the first step, and the diameter of the second step is smaller than that of the first step.
Preferably, the mesh number of the fine mesh tray and the fine mesh cover plate is controlled to be 100-400 meshes, and four corners of the fine mesh tray and four corners of the fine mesh cover plate are respectively provided with fine mesh tray mounting holes and fine mesh cover plate mounting holes.
Preferably, the fine mesh cleaning device comprises a connecting plate, a high-pressure air bin and a nozzle, one end of the connecting plate is connected to the side face of the fine mesh tray, the top of the high-pressure air bin is connected to the lower portion of the connecting plate, a plurality of one-way valves are connected to the outer side of the high-pressure air bin, a plurality of pressure valves are connected to the inner side of the high-pressure air bin, the rear end of each one-way valve is connected to the inside of the heat-insulating air storage cylinder, an air inlet pipe is connected to the side face of the heat-insulating air storage cylinder, a cooler is further connected to the air inlet pipe, a nozzle is connected to the pressure valves, and the tail end of the nozzle is lifted up in an inclined mode
Preferably, (1) installing a fine mesh tray through a step fixing shaft;
(2) filling adsorbent in the fine mesh tray, and covering the fine mesh tray with a fine mesh cover plate;
(3) and sending the bearing box and the battery cell in the bearing box into a baking box by using the trolley, and opening a baking program to bake.
Compared with the prior art, the invention has the beneficial effects that:
1. the parts of the device designed in the invention are simple and easy to obtain, low in cost, nontoxic and environment-friendly;
2. the used adsorbent is basically physical adsorption, can be recycled after being treated, and has low cost;
3. the baking time required by baking through the device is obviously shortened, and the productivity is greatly improved;
4. the storage pressure of the battery cell to be baked is obviously reduced, and the process management and control risk is reduced;
5. the invention can effectively remove pole piece dust and other matters covered on the surface of the fine mesh tray when the fine mesh tray is used for a long time, and the service life is prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a schematic diagram of a device for placing a soft package battery cell;
fig. 4 is a schematic diagram of a device for placing hard-shell cells;
FIG. 5 is a schematic sectional view of a step stationary shaft;
FIG. 6 is an enlarged view of the structure at D in FIG. 4;
fig. 7 is a process flow diagram.
Wherein: 1-a carrying case; 11-a bracket; 12-a tray;
2-step fixed shaft; 21-fixing the steps; 22-a first step; 23-a second step;
3-a fine mesh tray; 31-fine mesh tray mounting holes;
4-fine mesh cover plate; 41-fine mesh cover plate mounting holes;
5-adsorbent; 6-a hard shell cell; 7-soft package battery core;
8-fine mesh cleaning device; 81-connecting plates; 82-high-pressure air bin; 83-nozzles; 84-a one-way valve; 85-pressure valve; 86-heat-insulating air cylinder; 87-air inlet pipe; 88-cooler.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Referring to fig. 1 to 7, the present invention provides a technical solution: the utility model provides an efficient drying process and device, includes bears case 1, be provided with many step fixed axles 2 on the case mouth four corners of bearing case 1, the bottom of step fixed axle 2 is equipped with fixed step 21, step fixed axle 2 inserts in the case mouth of bearing case 1 through fixed step 21, step fixed axle 2 is gone up from down upwards to be equipped with fine mesh tray 3 and fine mesh cover plate 4 in proper order, fine mesh cover plate 4 covers on fine mesh tray 3, packs adsorbent 5 in the interval between the two, fine mesh tray 3 both sides still be equipped with fine mesh cleaning device 8, fine mesh cleaning device 8 is used for the powder that clean pole piece produced.
Example 1
In this embodiment, the carrying case 1 is a supporting frame 11, and the supporting frame 11 can better carry the hard-shell battery core 6, so that the battery core is not easy to be damaged.
In this embodiment, the step fixing shaft 2 is provided with a first step 22 and a second step 23, where the second step 23 is located above the first step 22, and the diameter of the second step 23 is smaller than that of the first step 22. The mesh numbers of the fine mesh tray 3 and the fine mesh cover plate 4 are controlled to be 100-400 meshes, four corners of the fine mesh tray 3 and four corners of the fine mesh cover plate 4 are respectively provided with fine mesh tray mounting holes 31 and fine mesh cover plate mounting holes 41, the fine mesh tray 3 is firstly mounted on the first step 22 through the fine mesh tray mounting holes 31, the adsorbent 5 is filled in the fine mesh tray, and then the fine mesh cover plate mounting holes 41 are mounted through the second step 23, so that the whole device is mounted.
In this embodiment, the fine mesh cleaning device 8 includes a connecting plate 81, a high-pressure air chamber 82 and a nozzle 83, one end of the connecting plate 81 is connected to the side surface of the fine mesh tray 3, the top of the high-pressure air chamber 82 is connected to the lower part of the connecting plate 81, a plurality of one-way valves 84 are connected to the outer side of the high-pressure air chamber 82, a plurality of pressure valves 85 are connected to the inner side of the high-pressure air chamber 82, the rear end of the one-way valves 84 is connected to the inside of a heat insulation air storage cylinder 86, the side surface of the heat insulation air storage cylinder 86 is connected to an air inlet pipe 87, a cooler 88 is further connected to the air inlet pipe 87, a nozzle 83 is connected to the pressure valves 85, and the tail end of the nozzle 83 is lifted up in an inclined manner. When baking is carried out, the high-pressure air bin 82 continuously increases the air pressure of the internal air along with the increase of the external temperature, when the set pressure of the pressure valve 85 is increased, the air is sprayed out through the nozzle 83 in a bursting manner, the bottom of the fine mesh tray 3 is impacted by the extremely rapid air flow, powder possibly adhered to a pole piece on the fine mesh tray 3 is carried away by the impact and the air flow, after the air in the high-pressure air bin 82 is sprayed out, part of the air in the heat-insulating air storage 86 is filled into the high-pressure air bin 82 through the one-way valve 84, but the air pressure of the high-pressure air bin 82 does not reach the set pressure of the pressure valve 85, then the air in the heat-insulating air storage 86 is supplemented by the air cooled by the cooler 88, the cooler 88 is connected to an external air pump, and the air flow can enter the heat-insulating air storage 86, and the cooler 88 can be a German FUNKE cooler.
In this embodiment, the drying process is as follows:
a plurality of cells to be baked are placed in the supporting frame 11. Then, a fine mesh tray 3 filled with adsorbent and a fine mesh cover plate 4 are mounted above the tray frame 11The number of fine meshes is 120 meshes. The adsorbent 5 is added in the fine mesh tray 3, the components of the adsorbent 5 are active carbon and quicklime drying agent, the proportion is 1:1, the particle size D50 is controlled to be about 1mm, the minimum particle size is larger than 124 mu m, the amount of particles cannot exceed half of the volume of the whole fine mesh tray 3, and a certain adsorption space and an expansion space after the particles are adsorbed or reacted are ensured in the fine mesh tray 3. Pushing the whole supporting frame 11 into the cavity of the baking oven, closing the outer door, starting the baking procedure, wherein the temperature requirement is 100+/-5 ℃, and the vacuum degree requirement is (0.9-1.2) x 10 3 Pa, set time to 8h. And after baking, testing the water content of the electrode slice by using a Karl Fischer tester, and recording. If the electric core with unqualified water content is met, a batch of adsorbents 5 are replaced, baking is carried out for 1 hour, then the water content is tested again, if the electric core is qualified, the next step is carried out, and the previous action is repeated until the water content is qualified.
After verification and continuous statistics for 3 days, the result is that 80% of the battery cells are qualified within 8 hours, 19% are qualified within 9 hours, and 1% are qualified within 10 hours. It is stated that setting 8h is acceptable and the weighted average of the baking times is 8.2h. The daily productivity is improved to about 1800 pieces per day, which is increased by 81% compared with the original productivity.
Example two
In this embodiment, the carrying case 1 is a supporting case 12, and the supporting case 12 can better support the flexible package of the battery cells 7 from the outside.
In this embodiment, the step fixing shaft 2 is provided with a first step 22 and a second step 23, where the second step 23 is located above the first step 22, and the diameter of the second step 23 is smaller than that of the first step 22. The mesh numbers of the fine mesh tray 3 and the fine mesh cover plate 4 are controlled to be 100-400 meshes, four corners of the fine mesh tray 3 and four corners of the fine mesh cover plate 4 are respectively provided with fine mesh tray mounting holes 31 and fine mesh cover plate mounting holes 41, the fine mesh tray 3 is firstly mounted on the first step 22 through the fine mesh tray mounting holes 31, the adsorbent 5 is filled in the fine mesh tray, and then the fine mesh cover plate mounting holes 41 are mounted through the second step 23, so that the whole device is mounted.
In this embodiment, the fine mesh cleaning device 8 includes a connecting plate 81, a high-pressure air chamber 82 and a nozzle 83, one end of the connecting plate 81 is connected to the side surface of the fine mesh tray 3, the top of the high-pressure air chamber 82 is connected to the lower part of the connecting plate 81, a plurality of one-way valves 84 are connected to the outer side of the high-pressure air chamber 82, a plurality of pressure valves 85 are connected to the inner side of the high-pressure air chamber 82, the rear end of the one-way valves 84 is connected to the inside of a heat insulation air storage cylinder 86, the side surface of the heat insulation air storage cylinder 86 is connected to an air inlet pipe 87, a cooler 88 is further connected to the air inlet pipe 87, a nozzle 83 is connected to the pressure valves 85, and the tail end of the nozzle 83 is lifted up in an inclined manner. When baking is carried out, the high-pressure air bin 82 continuously increases the air pressure of the internal air along with the increase of the external temperature, when the set pressure of the pressure valve 85 is increased, the air is sprayed out through the nozzle 83 in a bursting manner, the bottom of the fine mesh tray 3 is impacted by the extremely rapid air flow, powder possibly adhered to a pole piece on the fine mesh tray 3 is carried away by the impact and the air flow, after the air in the high-pressure air bin 82 is sprayed out, part of the air in the heat-insulating air storage 86 is filled into the high-pressure air bin 82 through the one-way valve 84, but the air pressure of the high-pressure air bin 82 does not reach the set pressure of the pressure valve 85, then the air in the heat-insulating air storage 86 is supplemented by the air cooled by the cooler 88, the cooler 88 is connected to an external air pump, and the air flow can enter the heat-insulating air storage 86, and the cooler 88 can be a German FUNKE cooler.
In this embodiment, the drying process is as follows:
a number of cells to be baked are placed in the tray 12. Then, a fine mesh tray 3 filled with an adsorbent and a fine mesh cover plate 4 having a mesh number of 120 mesh were installed above the upper side of the tray. Adding an adsorbent 5 into the fine mesh tray 3, wherein the components of the adsorbent 5 are active carbon and silica gel drying agent, the proportion is 6:4, the particle size D50 is controlled to be about 1mm, and the minimum particle size is more than 124 mu m; the amount of the particulate matters does not exceed half the volume of the whole fine mesh tray 3, so that a certain adsorption space and an expansion space after the particulate matters are adsorbed or reacted are ensured in the fine mesh tray 3. The whole tray 12 is pushed into the cavity of the baking oven, 4-5 trays 12 are placed in one box, then the outer door is closed, the baking procedure is started, the temperature requirement is 100+/-5 ℃, and the vacuum degree requirement reaches (8-9) x 10 4 Pa，The set time was 30h. And after baking, testing the water content of the electrode slice by using a Karl Fischer tester, and recording. If the battery cell with unqualified water content is met, a batch of adsorbent 5 is replaced, baking is carried out for 2 hours, and then the water content is tested. And if the water content is qualified, the next step is carried out, and the previous action is repeated until the water content is qualified.
After verification and continuous statistics for 3 days, the result is that 66% of the battery cells are qualified within 30 hours, 26.4% are qualified within 32 hours, 5% are qualified within 34 hours, 1.6% are qualified within 36 hours, and 0.5% are qualified within 36 hours. It is also acceptable to say that the set-up time is 30h, the weighted average of the baking times being 30.7h. The daily productivity is improved to about 3200 pieces/day, which is increased by 59.5 percent compared with the original productivity.
Based on the above, the parts of the device designed in the invention are simple and easy to obtain, low in cost, nontoxic and environment-friendly; the used adsorbent is basically physical adsorption, can be recycled after being treated, and has low cost; the baking time required by baking through the device is obviously shortened, and the productivity is greatly improved; the storage pressure of the battery cells to be baked is remarkably reduced, and the process management and control risk is reduced.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (2)
1. An efficient drying device, characterized in that: the device comprises a bearing box (1), wherein a plurality of step fixing shafts (2) are arranged at four corners of a box opening of the bearing box (1), fixed steps (21) are arranged at the bottoms of the step fixing shafts (2), the step fixing shafts (2) are inserted into the box opening of the bearing box (1) through the fixed steps (21), a fine mesh tray (3) and a fine mesh covering plate (4) are sequentially arranged on the step fixing shafts (2) from bottom to top, the fine mesh covering plate (4) covers the fine mesh tray (3), adsorbents (5) are filled in intervals between the fine mesh tray and the fine mesh covering plate, fine mesh cleaning devices (8) are further arranged at two sides of the fine mesh tray (3), and the fine mesh cleaning devices (8) are used for cleaning powder generated by pole pieces;
the fine mesh cleaning device (8) comprises a connecting plate (81), a high-pressure air bin (82) and a nozzle (83), one end of the connecting plate (81) is connected to the side face of a fine mesh tray (3), the top of the high-pressure air bin (82) is connected to the lower portion of the connecting plate (81), a plurality of one-way valves (84) are connected to the outer side of the high-pressure air bin (82), a plurality of pressure valves (85) are connected to the inner side of the high-pressure air bin (82), the rear end of the one-way valve (84) is connected to the inside of a heat insulation air storage cylinder (86), an air inlet pipe (87) is connected to the side face of the heat insulation air storage cylinder (86), a cooler is further connected to the air inlet pipe (87), the nozzle (83) is connected to the pressure valve (85), and the tail end of the nozzle (83) is lifted up in an inclined mode.
The bearing box (1) is provided with two different structures, namely a supporting frame (11) and a supporting box (12);
the step fixing shaft (2) is respectively provided with a first step (22) and a second step (23), the second step (23) is positioned above the first step (22), and the diameter of the second step (23) is smaller than that of the first step (22);
the mesh number of the fine mesh tray (3) and the fine mesh covering plate (4) is controlled to be 100-400 meshes, and four corners of the fine mesh tray (3) and four corners of the fine mesh covering plate (4) are respectively provided with fine mesh tray mounting holes (31) and fine mesh covering plate mounting holes (41).
2. The efficient drying device according to claim 1, wherein the drying process comprises the following steps:
(1) a fine mesh tray (3) is arranged through a step fixing shaft (2);
(2) filling the fine mesh tray (3) with an adsorbent (5), and covering the fine mesh tray (3) with a fine mesh cover plate (4);
(3) and sending the bearing box (1) and the battery cells in the bearing box into a baking box by using the trolley, opening a baking program, and baking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210100238.6A CN114754545B (en) | 2022-01-27 | 2022-01-27 | Efficient drying process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210100238.6A CN114754545B (en) | 2022-01-27 | 2022-01-27 | Efficient drying process and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114754545A CN114754545A (en) | 2022-07-15 |
| CN114754545B true CN114754545B (en) | 2024-01-26 |
Family
ID=82325465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210100238.6A Active CN114754545B (en) | 2022-01-27 | 2022-01-27 | Efficient drying process and device |
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| CN105544270B (en) * | 2016-02-01 | 2019-03-15 | 侯俊民 | Piston type vacuum dewatering system |
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| WO2012118244A1 (en) * | 2011-02-28 | 2012-09-07 | (주)엠오텍 | Vacuum drying apparatus of electrode plate for secondary battery and drying method therefor |
| CN203116443U (en) * | 2013-02-07 | 2013-08-07 | 深圳市沃特玛电池有限公司 | Drying device for lithium iron battery cell |
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