CN215523932U - Battery pole piece drying device - Google Patents
Battery pole piece drying device Download PDFInfo
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- CN215523932U CN215523932U CN202122254642.2U CN202122254642U CN215523932U CN 215523932 U CN215523932 U CN 215523932U CN 202122254642 U CN202122254642 U CN 202122254642U CN 215523932 U CN215523932 U CN 215523932U
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- pole piece
- battery pole
- guide roller
- drying oven
- drying
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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
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Abstract
The utility model discloses a battery pole piece drying device, wherein the battery pole piece is coated with slurry, the slurry comprises a binder and a solvent, and the battery pole piece drying device comprises: a drying oven, a conveying device and a vibrating device. The drying oven is provided with an inlet and an outlet; the conveying device is used for conveying the battery pole piece into the drying oven from the inlet and leaving the drying oven from the outlet; the vibrating equipment is arranged in the drying oven and is used for vibrating the adhesive. The utility model has the beneficial technical effect of eliminating the floating of the adhesive on the battery pole piece in the coating process.
Description
Technical Field
The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a battery pole piece drying device.
Background
Coating is an important component in the manufacturing process of the lithium ion battery and is also an important process related to the performance of the lithium ion battery. The main components of the positive and negative pole pieces comprise active substances, conductive agents, binders, current collectors and the like, wherein the binders are mainly used for binding active substance particles with the active substance particles and binding the active substance particles with the current collectors, the binding strength of the pole pieces is directly influenced, and when the binding force ratio is lower, the active substances are easy to fall off in the manufacturing process and the circulating storage process of the lithium ion battery, so that the performance and the safety of the battery are influenced.
In the current manufacturing process of the lithium ion battery pole piece, the positive pole piece and the negative pole piece are generally dried by a blast oven after being coated, so as to achieve the effect of removing the solvent. In the drying process, the surface temperature is higher than the internal temperature, so that the solvent on the upper layer can volatilize firstly, the concentration gradient of the solvent exists in the longitudinal area of the positive and negative pole pieces, the solvent in the pole pieces is enabled to migrate upwards, in the process that the solvent migrates upwards, the binder migrates upwards along with the solvent, the dried pole piece binder is enabled to be unevenly distributed, the pole piece bonding strength is reduced, and the active substances are easy to fall off.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a battery pole piece drying device, which at least solves the problem that the adhesive on the battery pole piece floats upwards in the coating process in the prior art.
In order to solve the above problems, the present invention provides a battery pole piece drying device, comprising:
a drying oven, the drying oven including an inlet and an outlet;
a conveyor for conveying battery pole pieces from the inlet into the drying oven and out of the drying oven from the outlet; and
and the vibration equipment is arranged in the drying oven and is used for vibrating the battery pole piece.
In one embodiment, the length of the battery pole piece conveyed by the conveying device is 1 to 2 times the length of the drying oven per minute.
In one embodiment, the conveying equipment comprises a first guide roller and a second guide roller, the first guide roller is arranged at the inlet, the second guide roller is arranged at the outlet, the battery pole piece is laid on the first guide roller and the second guide roller, and the first guide roller and the second guide roller rotate at the same speed.
In one embodiment, the first and second guide rollers are adapted to contact a side of the battery pole piece facing away from the slurry.
In one embodiment, the vibration device comprises at least one group of ultrasonic emitters and ultrasonic transducers, the ultrasonic emitters are electrically coupled with the ultrasonic transducers, and the ultrasonic emitters are arranged on the side, opposite to the slurry of the battery pole piece, of the battery pole piece.
In one embodiment, the ultrasonic transmitter is spaced apart from the battery pole piece.
In one embodiment, a group of the vibration devices is uniformly arranged in the range of every 1 to 3 meters in the conveying direction of the battery pole piece.
In one embodiment, every 2 meters of the conveying direction of the battery pole pieces is uniformly provided with a group of vibration devices.
In one embodiment, the frequency of the ultrasonic transmitter is between 40 and 60KHz, and the power of the ultrasonic transducer is between 40 and 60W.
In one embodiment, the frequency of the ultrasonic transmitter is 50KHz, and the power of the ultrasonic transducer is 50W.
The application discloses battery pole piece drying device has following beneficial technological effect at least: the distribution of the binder inside the battery pole piece entering the drying oven is more uniform through the vibration equipment, so that the binding power of the battery pole piece is increased, the stability of the battery pole piece is improved, the safety performance of the battery is improved, the internal resistance of the battery pole piece is reduced, and the power performance of the battery is improved by reducing the internal resistance of the battery.
Drawings
Fig. 1 is a schematic view of a battery pole piece drying apparatus according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.
The utility model provides a battery pole piece drying device, wherein slurry is coated on a battery pole piece, the slurry comprises a binder and a solvent, and the battery pole piece drying device comprises a drying oven, conveying equipment and vibrating equipment. The drying device is provided with an inlet and an outlet, the inlet and the outlet are used for conveying the battery pole piece into the drying oven from the inlet by the conveying device and for leaving the drying oven from the outlet, the vibrating device is arranged in the drying oven, and the vibrating device is used for vibrating the adhesive on the battery pole piece. By adding the vibration equipment, the drying device for the battery pole piece solves the problem that the adhesive on the battery pole piece floats upwards in the coating process in the prior art.
Embodiments of the present invention are described below with reference to the drawings.
As shown in fig. 1, a battery pole piece drying apparatus provided in an embodiment of the present invention includes a drying oven 7, a conveying device, and a vibrating device. The battery pole piece comprises a current collector 2 and slurry 3 coated on the current collector 2, wherein the slurry 3 comprises a binder and a solvent. An inlet is arranged at the left side of the drying oven 7, and an outlet is arranged at the right side of the drying oven 7. The conveying device conveys the battery pole pieces into the drying oven 7 through the inlet of the drying oven 7 and conveys the battery pole pieces out of the drying oven 7 through the outlet of the drying oven 7. A vibrating device is provided inside the drying oven 7, the vibrating device being used to vibrate the binder of the slurry 3 on the current collector 2.
This embodiment has improved the dispersion effect of binder on battery pole piece through set up the vibrations equipment in drying oven, eliminates the binder come-up in the coating process, can make the binder distribution of battery pole piece on the battery pole piece in the baking process that gets into drying oven more even. In this way, the bonding force of the battery pole piece is increased, the stability of the battery pole piece is improved, and the safety performance of the battery is improved. In addition, the internal resistance of the battery pole piece is reduced, so that the internal resistance of the battery is reduced, and the power performance of the battery is improved. The vibration equipment can be selected by a person skilled in the art according to actual needs, and only the effect of uniformly distributing the adhesive on the battery pole piece can be achieved.
Further, the length of the battery pole piece conveyed by the conveying device per minute is 1-2 times of the length of the drying oven. Through this setting for the time of conveying equipment in drying oven is enough long, and the battery pole piece can be dry completely, and shaking equipment can fully eliminate the problem of the binder come-up on the battery pole piece in the coating process, and in addition also can not lead to production efficiency to be low excessively for conveying equipment's speed is too slow. The person skilled in the art can select the transport speed of the transport device according to the actual need.
Alternatively, the transfer device may be provided comprising at least two guide rollers, including a first guide roller provided at the entrance of the drying oven and a second guide roller provided at the exit of the drying oven, with the battery pole pieces being laid on the first and second guide rollers. Specifically, as shown in fig. 1, the conveying apparatus is provided with two guide rollers: the battery pole piece drying device comprises a first guide roller 1 and a second guide roller 4, wherein the first guide roller 1 is arranged at an inlet on the left side of a drying oven 7, the second guide roller 4 is arranged at an outlet on the right side of the drying oven 7, a battery pole piece is laid on the first guide roller 1 and the second guide roller 4, and the first guide roller 1 and the second guide roller 4 rotate at the same speed to drive the battery pole piece on the first guide roller 1 and the second guide roller 4 to pass through the drying oven 7 at the rotating speeds of the first guide roller 1 and the second guide roller 4. The arrows marked on the first guide roller 1 and the second guide roller 4 in the figure are the rotating directions of the first guide roller 1 and the second guide roller 4, if the first guide roller 1 and the second guide roller 4 rotate in the direction opposite to the arrows in the figure, the opening on the right side of the drying oven 7 is the entrance of the battery pole piece into the drying oven 7, and the opening on the left side of the drying oven 7 is the exit of the battery pole piece out of the drying oven 7, and the embodiment does not depart from the scope of the utility model.
The utility model is not limited to the embodiment, and the battery pole piece can be placed on the conveying belt by laying a heat-conducting mesh-shaped conveying belt on the first guide roller and the second guide roller; the battery pole piece drying device also can provide better support for the battery pole piece by uniformly arranging the guide rollers between the first guide roller and the second guide roller, each guide roller rotates at the same speed at a constant speed, and other technical schemes for driving the battery pole piece to enter and leave the drying oven do not depart from the scope of the utility model.
Preferably, the side of the battery pole piece facing away from the slurry is in contact with the first guide roller and the second guide roller. As shown in fig. 1, the slurry 3 of the battery pole piece is located above the current collector 2, and the current collector 2 is in contact with the first guide roller 1 and the second guide roller 4 and is located above the first guide roller 1 and the second guide roller 4. Through the arrangement, the situation that the slurry is in contact with the first guide roller and the second guide roller, so that the slurry on the battery pole piece is damaged and the safety performance of the battery is influenced can be prevented. The setting can be performed by those skilled in the art according to actual needs.
In other embodiments, the vibration device may include at least one set of an ultrasonic transmitter and an ultrasonic transducer, the ultrasonic transmitter and the ultrasonic transducer are electrically connected, and the ultrasonic generator is disposed on the side of the battery pole piece facing away from the paste. Specifically, as shown in fig. 1, the vibration device is provided with five groups of ultrasonic emitters 5 and ultrasonic transducers 6, each group of ultrasonic emitters 5 is in circuit connection with the ultrasonic transducers 6, the ultrasonic emitters 5 are located on the side, away from the slurry 3, of the battery pole piece, and the ultrasonic waves emitted by the ultrasonic emitters 5 can be conducted to the battery pole piece through air. The ultrasonic emitter may be held in the drying oven by brackets or other means.
Because the surface temperature of the battery pole piece is higher than the internal temperature in the drying process of the battery pole piece entering the drying oven, the solvent on the upper layer is firstly volatilized, and the concentration gradient of the solvent exists in the longitudinal area of the battery pole piece, so that the solvent in the battery pole piece is enabled to move upwards. In the process of upward migration of the solvent, the adhesive can migrate upward along with the solvent, so that the dried pole piece adhesive is unevenly distributed. However, the ultrasonic emitter is arranged on the side, away from the slurry of the battery pole piece, so that when the battery pole piece enters the drying oven and passes through the action area of the ultrasonic emitter, the dispersion effect of the binder in the pole piece is improved, and the binder molecules are ensured to be longitudinally and uniformly distributed on the battery pole piece. In addition, the slurry on the surface of the battery pole piece can be prevented from falling off due to the vibration of the ultrasonic transmitter to the binder, so that the damage to the battery pole piece is avoided, and the performance of the battery is further influenced. The setting can be performed by those skilled in the art according to actual needs.
Preferably, the ultrasonic transmitter is spaced from the battery pole piece. As shown, the ultrasonic emitter 5 is not attached to the current collector 2. The ultrasonic transmitter is close to the current collector as much as possible, so that the vibration effect of the ultrasonic transmitter on the binder is better, the ultrasonic transmitter needs to be spaced from the battery pole piece, and the damage to the battery pole piece possibly caused by the ultrasonic transmitter is prevented, so that the performance of the battery is further influenced. The setting can be performed by those skilled in the art according to actual needs.
Further, a group of vibration devices are uniformly arranged in the range of every 1-3 meters of the battery pole piece in the conveying direction. A group of vibration equipment is uniformly arranged in the range of 1-3 meters, so that the vibration equipment can completely vibrate the binder as much as possible, the condition of floating of the binder caused by passing through a drying oven in the coating process is eliminated to the maximum extent, and meanwhile, the waste of cost caused by excessively dense arrangement of the vibration equipment is avoided. The vibrating device can be uniformly arranged in a proper interval range according to actual needs by a person skilled in the art. More preferably, every 2 meters in the conveying direction of the battery pole pieces are uniformly provided with a group of vibration devices.
In addition, the frequency of the ultrasonic transmitter is between 40 and 60KHz, and the power of the ultrasonic transducer is between 40 and 60W. As shown, the frequency of the ultrasonic transmitter 5 is set between 40-60KHz, and the power of the ultrasonic transducer 6 is set between 40-60W. This kind of setting for ultrasonic emitter's frequency is enough big can furthest's elimination coating in-process through the condition of the come-up of the binder that drying oven caused, is unlikely to the too big attached thick liquids that cause on the mass flow body of frequency to break away from the mass flow body again simultaneously, causes the damage and then influence the performance of battery to battery pole piece. In order to achieve the required frequency of the ultrasonic transmitter, the power of the corresponding ultrasonic transducer needs to be between 40 and 60W. The skilled person can select the desired one according to the actual need. More preferably, the frequency of the ultrasonic transmitter is 50KHz, and the power of the ultrasonic transducer is 50W.
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
The above examples are merely illustrative of the preferred embodiments of the present application and are not intended to limit the scope of the present application.
The drying device for the battery pole piece solves the problem that the adhesive on the battery pole piece floats upwards in the coating process in the prior art.
Compare with domestic similar research and product achievement, the battery pole piece drying device of this application has following beneficial technological effect: the distribution of the binder inside the battery pole piece entering the drying oven is more uniform through the vibration equipment, so that the binding power of the battery pole piece is increased, the stability of the battery pole piece is improved, the safety performance of the battery is improved, the internal resistance of the battery pole piece is reduced, and the power performance of the battery is improved by reducing the internal resistance of the battery.
While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the utility model can be effected therein by those skilled in the art after reading the above teachings of the utility model. Such equivalents are intended to fall within the scope of the claims appended hereto.
Claims (10)
1. A battery pole piece drying device is characterized by comprising:
a drying oven, the drying oven including an inlet and an outlet;
a conveyor for conveying battery pole pieces from the inlet into the drying oven and out of the drying oven from the outlet; and
and the vibration equipment is arranged in the drying oven and is used for vibrating the battery pole piece.
2. The battery pole piece drying device of claim 1, wherein the length of the battery pole piece conveyed by the conveying device per minute is 1 to 2 times the length of the drying oven.
3. The battery pole piece drying device of claim 1, wherein the conveying device comprises a first guide roller and a second guide roller, the first guide roller is disposed at the inlet, the second guide roller is disposed at the outlet, the battery pole piece is laid on the first guide roller and the second guide roller, and the first guide roller and the second guide roller rotate at the same speed.
4. The battery pole piece drying apparatus of claim 3, wherein the first guide roller and the second guide roller are adapted to contact a side of the battery pole piece facing away from the slurry.
5. The battery pole piece drying device of claim 1, wherein the vibration device comprises at least one set of an ultrasonic emitter and an ultrasonic transducer, the ultrasonic emitter is electrically coupled with the ultrasonic transducer, and the ultrasonic emitter is disposed on the side of the battery pole piece facing away from the slurry.
6. The battery pole piece drying apparatus of claim 5, wherein the ultrasonic transmitter is spaced apart from the battery pole piece.
7. The battery pole piece drying device according to claim 5, wherein a group of the vibration devices is uniformly arranged in the range of every 1 to 3 meters in the conveying direction of the battery pole piece.
8. The battery pole piece drying device of claim 7, wherein a group of the vibration devices is uniformly arranged every 2 meters in the conveying direction of the battery pole piece.
9. The battery pole piece drying device of claim 7, wherein the frequency of the ultrasonic transmitter is between 40 and 60KHz, and the power of the ultrasonic transducer is between 40 and 60W.
10. The battery pole piece drying device of claim 9, wherein the frequency of the ultrasonic transmitter is 50KHz, and the power of the ultrasonic transducer is 50W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122254642.2U CN215523932U (en) | 2021-09-16 | 2021-09-16 | Battery pole piece drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122254642.2U CN215523932U (en) | 2021-09-16 | 2021-09-16 | Battery pole piece drying device |
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| Publication Number | Publication Date |
|---|---|
| CN215523932U true CN215523932U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122254642.2U Active CN215523932U (en) | 2021-09-16 | 2021-09-16 | Battery pole piece drying device |
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| CN (1) | CN215523932U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116393343A (en) * | 2023-04-12 | 2023-07-07 | 燕山大学 | Lithium battery pole piece drying equipment |
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2021
- 2021-09-16 CN CN202122254642.2U patent/CN215523932U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116393343A (en) * | 2023-04-12 | 2023-07-07 | 燕山大学 | Lithium battery pole piece drying equipment |
| CN116393343B (en) * | 2023-04-12 | 2023-11-07 | 燕山大学 | Lithium battery pole piece drying equipment |
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