CN217236360U - Lithium ion battery pole piece baking device - Google Patents
Lithium ion battery pole piece baking device Download PDFInfo
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- CN217236360U CN217236360U CN202121267999.8U CN202121267999U CN217236360U CN 217236360 U CN217236360 U CN 217236360U CN 202121267999 U CN202121267999 U CN 202121267999U CN 217236360 U CN217236360 U CN 217236360U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a lithium ion battery pole piece baking equipment, the device include box and chamber door, its characterized in that: a convection cavity is arranged in the box body, and box doors are arranged at two ends of the convection cavity; convection current formula cavity middle part is equipped with the high temperature and toasts the district, and the both ends in high temperature toast the district all are equipped with the medium temperature and toast the district, and the other end in medium temperature toasts the district is equipped with the low temperature and toasts the district. The utility model has the characteristics of the energy consumption is with low costs, toast effectual, the baking time is short and rate of equipment utilization is high.
Description
Technical Field
The utility model relates to a lithium ion battery prepares technical field, specifically indicates a lithium ion battery pole piece baking equipment.
Background
There are many factors that affect the performance of lithium batteries, such as the type of material, the compacted density of the positive and negative electrodes, the moisture, the coating surface density, and the amount of electrolyte. The moisture has a crucial influence on the performance of the lithium ion battery, the moisture is a key factor which needs to be strictly controlled in the production process of the lithium ion battery, and when the moisture is excessive, the moisture can not only cause the decomposition of lithium salt in the electrolyte and have a certain corrosion damage effect on a positive and negative electrode material and a current collector, but also cause the reduction of the cycle performance and the safety performance of the battery, so that the baking of the pole piece is an important process in the manufacturing process of the lithium ion battery.
At present, the pole piece is mainly baked by an oven in the industry, a high-temperature baking additional built-in fan or a vacuumizing mode is generally adopted for ensuring the baking effect and accelerating the baking process, however, the binding agent in the pole piece is sensitive to high temperature and cannot be excessively set with overhigh temperature for baking, so that the baking effect is very poor, and the baking process needs long time. Moreover, after high-temperature baking, in order to avoid the situation that the high-temperature pole piece is instantly cooled to form water vapor on the surface of the pole piece when being taken out, the pole piece needs to be taken out after the baking is finished and the baking oven is cooled to be close to the room temperature, so that the time of the pole piece occupying the baking oven is greatly prolonged, the utilization rate of equipment is low, and the capacity allocation is limited. Some enterprises are provided with a large number of ovens to meet the capacity requirement, and a large amount of factory area is occupied; in addition, in the working process of the high-temperature oven, heat is directly emitted in the environment, huge energy waste is caused, and energy consumption cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a lithium ion battery pole piece baking equipment has the characteristics that the energy consumption is with low costs, toast effectual, the baking time is short and rate of equipment utilization is high.
The utility model discloses can realize through following technical scheme:
the utility model discloses a lithium ion battery pole piece baking device, which comprises a box body and a box door, wherein a convection type cavity is arranged in the box body, and the box door is arranged at both ends of the convection type cavity; convection current formula cavity middle part is equipped with the high temperature and toasts the district, and the both ends in high temperature toast the district all are equipped with the medium temperature and toast the district, and the other end in medium temperature toasts the district is equipped with the low temperature and toasts the district.
Furthermore, the bottom of the box body is provided with a material moving track which runs through the high-temperature baking area, the medium-temperature baking area and the low-temperature baking area, and the moving track is movably provided with pole piece trays corresponding to different temperature areas.
Furthermore, a first isolation plate is movably arranged between the high-temperature baking area and the medium-temperature baking area, and a second isolation plate is movably arranged between the medium-temperature baking area and the low-temperature baking area.
Furthermore, a plurality of heating pipes are arranged on the side wall of the box body, air outlets or air outlets are arranged at the gaps of the adjacent heating pipes, and the air outlets or the air outlets incline towards the inner wall direction from the outer wall of the box body to realize flowing atmosphere flowing from the high-temperature baking area to the low-temperature baking area.
Furthermore, a plurality of air suction ports are arranged on the inner wall of the box body, and the number of the air suction ports is reduced from the low-temperature baking area to the high-temperature baking area in a gradient manner.
Furthermore, the box body is a metal box body, and a high-temperature flame-retardant heat-insulating layer is coated on the outer wall of the box body.
Furthermore, the outer wall of the box body is provided with an air inlet and a vacuum suction port, the air inlet is communicated with an external air source, and the vacuum suction port is communicated with a vacuum pump.
The utility model discloses an aspect lies in the baking method of the lithium ion battery pole piece of the above-mentioned baking equipment of protection in addition, including following step:
s1, initial baking: loading lithium ion battery pole pieces to be baked on three pole piece trays respectively, then adjacently placing the three pole piece trays at corresponding positions of a high-temperature baking area, a medium-temperature baking area and a low-temperature baking area on a movable track respectively, closing box doors at two ends, and setting a heating pipe in a starting box body to work and start initial baking;
s2, first moving sequence baking: after the initial baking is finished, the three pole piece trays synchronously move forwards, the pole piece tray in the previous high-temperature baking area is moved to the opposite medium-temperature baking area, the pole piece tray in the original medium-temperature baking area is moved to the high-temperature baking area, the pole piece tray in the original low-temperature baking area is moved to the medium-temperature baking area, and the first moving-sequence baking is started in the low-temperature baking area where the pole piece tray is moved away;
s3, second moving order baking: after the first sequence moving baking is finished, the pole piece tray in the cavity continuously and synchronously moves forwards, the pole piece tray which moves from the high-temperature baking area to the medium-temperature baking area is moved to the low-temperature baking area, other pole piece trays move sequentially, a new pole piece tray is placed in the low-temperature baking area after the pole piece tray is moved in the vacancy, and the second sequence moving baking is started;
s4, baking in a sequence changing manner: after the second moving-sequence baking is finished, opening the box door, taking out the pole piece trays entering the low-temperature baking area in the second moving-sequence baking, then putting new pole piece trays into the low-temperature baking area at the rear end of the moving sequence along the previous moving direction of all the pole piece trays, and starting sequence-changing baking;
and S5, continuous baking, wherein after the sequence-changing baking is finished, the sequence-changing baking operation in the step S4 is repeated to realize the continuous baking.
Furthermore, the adjacent pole piece trays are arranged on the moving track in a clearance mode, the clearance between the two adjacent pole piece trays corresponds to the positions of the first isolation plate and the second isolation plate, after the sequence-changing baking is finished, the box door at the feeding end, the first isolation plate and the second isolation plate are closed, then the box door at the discharging end is opened, and the pole piece trays in the low-temperature baking area are taken out; then closing a box door at the discharge end, opening the first isolation plate and the second isolation plate, and moving the pole piece tray in the box body forwards along the whole moving track to realize temperature zone change; and then closing the first isolation plate and the second isolation plate, opening a box door at the feeding end, and putting a new pole piece tray in the low-temperature baking area.
Furthermore, the moving track is of a gear crawler type rotating structure, and forward circulating movement is achieved through a rotating handle arranged on the outer wall of the box body.
The utility model relates to a lithium ion battery pole piece baking equipment has following beneficial effect:
firstly, the energy consumption cost is low, the utility model discloses a set up high temperature baking area, medium temperature baking area and low temperature baking area in the cavity, the temperature in the cavity is high both sides low in the middle of, forms different temperature gradients gradually, forms the gradient buffering between the high temperature baking area of effective toasting and external room temperature, avoids the direct difference in temperature convection of high temperature baking area and external room temperature, effectively reduces the outside scattering and disappearing of heat, with the law of heat scattering and disappearing of not theoretical model of gold law, fully improves heat utilization ratio, reduces the energy consumption cost;
secondly, the baking effect is good, the utility model discloses a set up high temperature baking area, medium temperature baking area and low temperature baking area in the cavity, the temperature in the cavity is high both sides low in the middle of being, forms different temperature gradients gradually, and the pole piece tray moves in the cavity through the removal track and progressively rises to bake the temperature and then progressively reduces to the room temperature again, forms the gradient and dries out, also avoids high temperature hot atmosphere to meet the comdenstion water after the high temperature takes out simultaneously, has effectively guaranteed the effect of baking;
thirdly, the baking time is short, the high-temperature baking area, the medium-temperature baking area and the low-temperature baking area are arranged in the cavity, the temperature in the cavity is high in the middle and low at both sides, different temperature gradients are gradually formed, the pole pieces in different temperature areas are alternately and continuously baked, the pole piece tray is not required to be taken out after the baking oven is cooled specially, the waiting time for putting in or taking out the pole piece tray is effectively reduced, and the baking time is reduced;
fourth, rate of equipment utilization is high, the utility model discloses a set up high temperature in the cavity and toast district, medium temperature and toast district and low temperature and toast the district, high both sides are low in the middle of the temperature in the cavity is, form different temperature gradients gradually, and at whole stoving in-process, different warm areas are the continuity and toast, and the oven does not have the idle period and does not have little rate of equipment utilization.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a lithium ion battery pole piece baking device of the present invention;
the reference numbers in the figures include: 100. 101, low temperature toast the district, 102, second division board, 103, middle temperature toast the district, 104, first division board, 105, high temperature toast the district, the box, 200, chamber door, 300, removal track, 301, rotatory handle, 302, pole piece tray.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the product of the present invention with reference to the embodiments.
Example 1
As shown in fig. 1, the utility model discloses a lithium ion battery pole piece baking device, which comprises a box body 100 and a box door 200, wherein a convection cavity is arranged in the box body 100, and the box door 200 is arranged at both ends of the convection cavity; convection current formula cavity middle part is equipped with high temperature and toasts district 105, and the both ends of high temperature toasting district 105 all are equipped with medium temperature and toast district 103, and the other end in medium temperature toasts the district and is equipped with low temperature and toasts district 101.
In this embodiment, the bottom of the box body is provided with a material moving track 300 which runs through the high-temperature baking area 105, the medium-temperature baking area 103 and the low-temperature baking area 101, and the moving track 300 is movably provided with a pole piece tray 302 corresponding to different temperature areas. Generally speaking, the movable track is built-in at the bottom of the box, generally adopts the movable track of metal material, has both had better mechanical bearing performance and guaranteed bearing of pole piece tray fixed, has better heat conduction effect again, realizes that the heat transfers the pole piece tray from the movable track and forms the heat conduction contact toasts to the pole piece.
In this embodiment, a first isolation plate 104 is movably disposed between the high temperature baking region 105 and the middle temperature baking region 103, and a second isolation plate 102 is movably disposed between the middle temperature baking region 103 and the low temperature baking region 101. The setting of first division board and second division board, mainly be based on the outside scattering and disappearing of pole piece tray avoiding heat around follow-up commentaries on classics preface, improve heat utilization rate, in concrete design, in order to avoid rigid plate to cause the influence to the removal of pole piece tray, first division board and second division board can adopt soft panel, set up the right angle shape simultaneously and accomodate the track on the box inner wall, through setting up the push-and-pull handle at box top outer wall to reciprocate first division board and second division board whole and accomodate and warm area keep apart.
In this embodiment, a plurality of heating pipes are arranged on the side wall of the box body, and an air outlet or an air outlet is arranged at the gap between the adjacent heating pipes, and the air outlet or the air outlet is inclined from the outer wall of the box body to the inner wall to realize the flowing atmosphere flowing from the high-temperature baking area to the low-temperature baking area. Through setting up the air outlet or the gas outlet of tilting, at the airtight in-process that toasts, toast the heat in district to low temperature and toast the district flow to high temperature, accelerate different warm-up areas heat convection interaction, improve heat utilization and rate, guarantee to toast the effect, reduce and toast the time.
In this embodiment, be equipped with a plurality of induction ports on the inner wall of box, the quantity of induction port toasts the district to high temperature from low temperature and toasts the district gradient and reduce to at the airtight in-process that toasts, toasts the heat in district to low temperature and toasts the district flow, accelerates different warm-area heat convection interactions, improves heat utilization, guarantees to toast the effect, reduces the stoving time.
In this embodiment, the box is the metal box, and the cladding of box outer wall is provided with the fire-retardant heat preservation of high temperature, effectively avoids the direct outside loss that gives off of high temperature heat of box and causes the heat.
In this embodiment, the box outer wall is equipped with air inlet and vacuum suction mouth, and the air inlet communicates with external air supply, and vacuum suction mouth and vacuum pump intercommunication can combine actual need to let in external air supply or the flow of the inside hot atmosphere of evacuation acceleration cavity.
Example 2
The utility model discloses an aspect lies in the baking method of the lithium ion battery pole piece of the above-mentioned baking equipment of protection in addition, including following step:
s1, initial baking: loading lithium ion battery pole pieces to be baked on three pole piece trays respectively, then adjacently placing the three pole piece trays at corresponding positions of a high-temperature baking area, a medium-temperature baking area and a low-temperature baking area on a movable track respectively, closing box doors at two ends, and setting a heating pipe in a starting box body to work and start initial baking;
s2, first moving sequence baking: after the initial baking is finished, the three pole piece trays synchronously move forwards, the pole piece tray in the previous high-temperature baking area is moved to the opposite medium-temperature baking area, the pole piece tray in the original medium-temperature baking area is moved to the high-temperature baking area, the pole piece tray in the original low-temperature baking area is moved to the medium-temperature baking area, and the first moving-sequence baking is started in the low-temperature baking area where the pole piece tray is moved away;
s3, second moving order baking: after the first moving-sequence baking is finished, the pole piece tray in the cavity continues to move forwards synchronously, the pole piece tray which is moved from the high-temperature baking area to the medium-temperature baking area is moved to the low-temperature baking area, other pole piece trays move sequentially, a new pole piece tray is placed in the low-temperature baking area which is moved to be vacant, and the second moving-sequence baking is started;
s4, baking in a sequence changing manner: after the second moving-sequence baking is finished, opening the box door, taking out the pole piece trays entering the low-temperature baking area in the second moving-sequence baking, then putting new pole piece trays into the low-temperature baking area at the rear end of the moving sequence along the previous moving direction of all the pole piece trays, and starting sequence-changing baking;
and S5, continuous baking, wherein after the sequence-changing baking is finished, the sequence-changing baking operation in the step S4 is repeated to realize the continuous baking.
Example 3
In the utility model, in order to ensure the full utilization of heat and reduce the dissipation of heat, the adjacent pole piece trays are arranged on the movable track in a clearance way, the clearance between the two adjacent pole piece trays corresponds to the positions of the first isolation plate and the second isolation plate, after the sequence changing baking is finished, the box door of the feeding end, the first isolation plate and the second isolation plate are all closed, then the box door of the discharging end is opened, and the pole piece tray in the low-temperature baking area is taken out; then closing a box door at the discharging end, opening a first isolation plate and a second isolation plate, and integrally moving a pole piece tray in the box body forwards along a moving track to realize temperature zone conversion; and then closing the first isolation plate and the second isolation plate, opening a box door at the feeding end, and putting a new pole piece tray in the low-temperature baking area.
Example 4
As shown in fig. 1, in the present invention, in order to ensure convenience of operation, the moving rail 300 is a gear-track type revolving structure, and the forward circulating movement is realized by a rotating handle 301 disposed on the outer wall of the box 100. Specifically, the rotating handle can be arranged at one or more of the two ends and the middle of the box body, for example, the rotating handle can be arranged at the two sides of the box body simultaneously, and the stability and operability of transmission are better ensured.
In order to fully explain the utility model discloses the technical effect of baking equipment and baking method gets the pole piece in the production and uses the utility model discloses device, method contrast with prior art's oven, baking method, contrast result as follows:
(1) comparison of baking times to reach the same moisture content: the pole pieces with different baking times are set by adopting a Karl Fischer method for sampling and testing, when the moisture of the pole pieces in the same batch reaches 250PPM required by quality control, the time consumed by the method of the utility model is saved by 35 percent compared with the time consumed by the prior art, and if the factors that the time occupied by the initial baking, the first order transferring baking and the second order transferring baking is more are considered, the baking time is saved more obviously;
(2) moisture content comparison for the same baking time: after the pole pieces in the same batch are not vacuumized and baked for 48 hours by an external air source, the moisture content is 640PPM after the traditional baking method is used for sampling and testing, and the test result of the method of the utility model is 280PPM, thereby basically meeting the process requirements.
The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, numerous variations and modifications can be made without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (8)
1. The utility model provides a lithium ion battery pole piece baking equipment, includes box and chamber door, its characterized in that:
a convection cavity is arranged in the box body, and box doors are arranged at two ends of the convection cavity;
convection current formula cavity middle part is equipped with the high temperature and toasts the district, the both ends in high temperature toast the district all are equipped with the medium temperature and toast the district, the other end in medium temperature toasts the district is equipped with the low temperature and toasts the district.
2. The baking device for the lithium ion battery pole piece according to claim 1, characterized in that: the bottom of the box body is provided with a material moving track which penetrates through the high-temperature baking area, the medium-temperature baking area and the low-temperature baking area, and the moving track is movably provided with pole piece trays corresponding to different temperature areas.
3. The lithium ion battery pole piece baking device of claim 2, wherein: the high temperature toasts the district with it is equipped with first division board to move between the middle temperature toasts the district, middle temperature toast the district with it is equipped with the second division board to move between the low temperature toasts the district.
4. The lithium ion battery pole piece baking device of claim 3, wherein: the side wall of the box body is provided with a plurality of heating pipes, and the gaps between the adjacent heating pipes are provided with air outlets or air outlets, wherein the air outlets or the air outlets are inclined from the outer wall to the inner wall of the box body to realize flowing atmosphere flowing from the high-temperature baking area to the low-temperature baking area.
5. The lithium ion battery pole piece baking device of claim 4, wherein: the inner wall of the box body is provided with a plurality of air suction ports, and the number of the air suction ports is reduced from the low-temperature baking area to the high-temperature baking area in a gradient manner.
6. The lithium ion battery pole piece baking device of claim 5, wherein: the box body is a metal box body, and a high-temperature flame-retardant heat-preservation layer is coated on the outer wall of the box body.
7. The lithium ion battery pole piece baking device of claim 6, wherein: the outer wall of the box body is provided with an air inlet and a vacuum suction port, the air inlet is communicated with an external air source, and the vacuum suction port is communicated with a vacuum pump.
8. The lithium ion battery pole piece baking device of claim 7, wherein: the moving track is of a gear crawler type rotary structure and can move forwards in a circulating mode through a rotating handle arranged on the outer wall of the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121267999.8U CN217236360U (en) | 2021-06-08 | 2021-06-08 | Lithium ion battery pole piece baking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121267999.8U CN217236360U (en) | 2021-06-08 | 2021-06-08 | Lithium ion battery pole piece baking device |
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| CN217236360U true CN217236360U (en) | 2022-08-19 |
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| CN202121267999.8U Active CN217236360U (en) | 2021-06-08 | 2021-06-08 | Lithium ion battery pole piece baking device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780209A (en) * | 2022-09-14 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Drying device and coating drying method |
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2021
- 2021-06-08 CN CN202121267999.8U patent/CN217236360U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780209A (en) * | 2022-09-14 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Drying device and coating drying method |
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