CN221551954U - Pole piece lithium supplementing device - Google Patents
Pole piece lithium supplementing device Download PDFInfo
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- CN221551954U CN221551954U CN202323380271.8U CN202323380271U CN221551954U CN 221551954 U CN221551954 U CN 221551954U CN 202323380271 U CN202323380271 U CN 202323380271U CN 221551954 U CN221551954 U CN 221551954U
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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
本实用新型涉及一种极片补锂装置，包括放卷组件、复合组件和收卷组件，其中：放卷组件用于放卷极片和锂带；复合组件设置在放卷组件与收卷组件之间，用于压合放卷后的极片和锂带，以得到复合极片；收卷组件用于收卷复合极片和锂带的离型纸；补锂装置还包括设置在放卷组件和复合组件之间的调节组件，用于调节放卷组件和复合组件之间的锂带的张紧程度。本实用新型可以在锂带张紧力发生波动影响复合过程时及时调整张紧力，使张紧力保持在适当的范围内，防止锂带在张紧力过大时发生断裂或张紧力过小时产生褶皱，从而能够提升复合的均匀性和复合极片的质量。
The utility model relates to a lithium replenishing device for a pole piece, comprising an unwinding component, a composite component and a rewinding component, wherein: the unwinding component is used for unwinding the pole piece and the lithium strip; the composite component is arranged between the unwinding component and the rewinding component, and is used for pressing the pole piece and the lithium strip after unwinding to obtain a composite pole piece; the rewinding component is used for rewinding the release paper of the composite pole piece and the lithium strip; the lithium replenishing device also includes an adjustment component arranged between the unwinding component and the composite component, and is used for adjusting the tension of the lithium strip between the unwinding component and the composite component. The utility model can timely adjust the tension of the lithium strip when the tension of the lithium strip fluctuates and affects the composite process, so that the tension is maintained within an appropriate range, and prevent the lithium strip from breaking when the tension is too large or wrinkling when the tension is too small, thereby improving the uniformity of the composite and the quality of the composite pole piece.
Description
Technical Field
The utility model relates to the technical field of pole piece lithium supplementing, in particular to a pole piece lithium supplementing device.
Background
In the first charging process of the lithium ion battery, the organic electrolyte is reduced and decomposed on the surface of a negative electrode such as graphite to form a solid electrolyte phase interface (SEI) film, and a large amount of lithium from a positive electrode is permanently consumed in the process, so that the capacity and the energy density of the lithium ion battery are reduced. Therefore, lithium is generally added to the interior of the battery to replenish lithium ions before the lithium ion battery is operated. In the prior art, a layer of lithium foil is generally compounded on the pole piece to supplement lithium to the electrode material, so as to counteract irreversible lithium loss and improve the total capacity and energy density of the battery.
The lithium supplementing device generally sends a lithium strip with lithium foil and a pole piece into a rolling mechanism, the lithium foil on the lithium strip is separated from release paper and transferred onto the pole piece through extrusion of a press roller to form a composite pole piece, and the composite pole piece and the release paper are respectively rolled by two rolling rollers. Because the lithium belt is thinner and has certain plasticity, the tension of the lithium belt can fluctuate in the pole piece compounding process, and the uniformity of pole piece compounding is affected.
Disclosure of utility model
Based on the problems, the tension fluctuation of the lithium belt in the compounding process affects the compounding uniformity, and a pole piece lithium supplementing device is needed.
The utility model provides a pole piece moisturizing device, includes unreeling subassembly, compound subassembly and rolling subassembly, wherein:
the unreeling component is used for unreeling the pole piece and the lithium belt;
The composite component is arranged between the unreeling component and the reeling component and is used for pressing the unreeled pole piece and the lithium belt to obtain a composite pole piece;
The winding component is used for winding the release paper of the composite pole piece and the lithium belt;
The lithium supplementing device further comprises an adjusting component arranged between the unreeling component and the composite component and used for adjusting the tensioning degree of the lithium belt between the unreeling component and the composite component.
In one embodiment, the adjustment assembly comprises:
the tensioning roller is abutted with the lithium belt;
And the first driving mechanism is connected with the tensioning roller and used for adjusting the position of the tensioning roller so as to control the tensioning degree of the lithium belt.
In one embodiment, the first drive mechanism is a motor and the adjustment assembly further comprises:
And one end of the connecting rod is connected with the output end of the motor, and the other end of the connecting rod is rotationally connected with the tensioning roller.
In one embodiment, the motor is a stepper motor for adjusting the rotational angle of the linkage.
In one embodiment, the first drive mechanism is a cylinder.
In one embodiment, the adjustment assembly further comprises:
The second driving mechanism is arranged at the output end of the first driving mechanism, is connected with the tensioning roller and is used for driving the tensioning roller to rotate around the axis and controlling the rotating speed of the tensioning roller.
In one embodiment, the adjustment assembly comprises:
the tension sensor is used for detecting the real-time tension of the lithium belt;
And the controller is electrically connected with the tension sensor and the motor and is used for adjusting the rotation direction and the rotation speed of the motor when the real-time tension is larger than a first preset tension threshold value so as to enable the tension roller to be far away from the lithium belt and reduce the tension of the lithium belt.
In one embodiment, a composite assembly includes:
At least two first press rolls for pressing the pole piece and the lithium belt;
And the second press roller is used for pressing the lithium belt on the first press roller, and the second press roller rotates along with the movement of the lithium belt.
In one embodiment, the second pressure roller is a rubber roller.
In one embodiment, the controller is further configured to adjust the rotational direction and rotational speed of the motor when the real-time tension is less than a second preset tension threshold, such that the tension roller approaches the lithium band, increasing the tension of the lithium band.
The pole piece lithium supplementing device comprises an unreeling component, a composite component and a reeling component, wherein the unreeling component is used for unreeling pole pieces and lithium strips; the pole piece and the lithium belt can be unfolded so as to facilitate the subsequent compounding step, and a compounding assembly is arranged between the unreeling assembly and the reeling assembly and is used for laminating the unreeled pole piece and the lithium belt so as to obtain a compound pole piece; the tight combination of the pole piece and the lithium belt can be realized; the winding component is used for winding the release paper of the composite pole piece and the lithium belt; can effectively take up compound pole piece and lithium area, the follow-up battery processing step of being convenient for and the going on of the recovery step from the type paper, the benefit lithium device still includes the adjusting part who sets up between unreeling subassembly and compound subassembly for adjust the tensioning degree of lithium area between unreeling subassembly and the compound subassembly, can in time adjust the tensioning force when the fluctuation takes place for lithium area tensioning force influences the compound process, make the tensioning force keep in appropriate scope, prevent that the lithium area from breaking when the tensioning force is too big or the tensioning force is too little produces the fold, thereby can promote the quality of compound homogeneity and compound pole piece.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural diagram of a pole piece lithium supplementing device provided by an embodiment of the application in a state of tensioning a lithium band;
Fig. 2 is a schematic structural diagram of a pole piece lithium supplementing device in a relaxed state of a lithium band according to an embodiment of the present application.
The above and other objects, features, advantages and embodiments of the present utility model will become more apparent by the following description of the attached symbols:
100: unreeling assembly, 110: pole piece unwind roller, 120: lithium tape unwind roller, 130: pole piece, 140: lithium band, 150: composite pole piece, 160: release paper, 200: composite assembly, 210: first press roller, 220: second press roller, 300: winding assembly, 310: pole piece wind-up roll, 320: release paper wind-up roll, 400: adjustment assembly, 410: first drive mechanism, 420: connecting rod, 430: tension roller, 440: a tension sensor.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a pole piece lithium supplementing device in a lithium band tensioning state according to an embodiment of the present utility model, where the pole piece lithium supplementing device provided by an embodiment of the present utility model includes an unreeling component, a compounding component and a reeling component, where:
the unreeling component is used for unreeling the pole piece and the lithium belt;
The composite component is arranged between the unreeling component and the reeling component and is used for pressing the unreeled pole piece and the lithium belt to obtain a composite pole piece;
The winding component is used for winding the release paper of the composite pole piece and the lithium belt;
The lithium supplementing device further comprises an adjusting component arranged between the unreeling component and the composite component and used for adjusting the tensioning degree of the lithium belt between the unreeling component and the composite component.
As shown in fig. 1, the pole piece lithium supplementing device provided by an embodiment of the present application includes an unreeling assembly 100, a composite assembly 200 and a reeling assembly 300 which are sequentially arranged. The unreeling assembly 100 is used for discharging the pole piece 130 and the lithium strip 140, enabling the pole piece 130 and the lithium strip 140 to enter the compounding assembly 200, the compounding assembly 200 is used for transferring the lithium foil on the lithium strip 140 onto the pole piece 130, and compounding the lithium foil and the pole piece 130 together to form the compound pole piece 150, and the reeling assembly 300 is used for reeling the compound pole piece 150 and the release paper 160 on the lithium strip 140 respectively.
The unreeling assembly 100 comprises a pole piece unreeling roller 110, a lithium strip unreeling roller 120 and an unreeling driving mechanism, wherein a pole piece roll is placed on the pole piece unreeling roller 110, a lithium strip 140 is arranged on the lithium strip unreeling roller 120, the lithium strip 140 comprises lithium foil and release paper 160, the release paper 160 is used for protecting the lithium foil and providing structural support for the lithium foil, and the uniformity of the composition is prevented from being influenced by cracking or falling off in the unreeling or compounding process. The axes of rotation of the pole piece unwind roller 110 and the lithium band unwind roller 120 are arranged in parallel such that the released pole piece 130 is directed to one side of the lithium foil on the lithium band 140. The unreeling driving mechanism is used for driving the two unreeling rollers to rotate so as to realize the release of the pole piece coil and the lithium band 140, and the pole piece unreeling roller 110 and the lithium band unreeling roller 120 can be driven to rotate in the same or opposite directions according to the winding directions of the pole piece 130 and the lithium band 140.
The composite assembly 200 comprises two first press rollers 210, a second press roller 220 and a composite driving mechanism, wherein the two first press rollers 210 are axially parallel and distributed along the vertical direction, the lithium belt 140 and the pole piece 130 enter between the two first press rollers 210, the release paper 160 positioned on one side of the lithium belt 140 is contacted with one of the first press rollers, the lithium foil positioned on the other side of the lithium belt 140 faces the pole piece 130, the pole piece 130 is contacted with the other first press roller, and the two first press rollers apply extrusion force to the pole piece 130 and the lithium foil; the compound driving mechanism is used for driving the two first press rollers to rotate in opposite directions, and under the rolling action of the two first press rollers, the lithium foil on the lithium belt 140 is compounded on the pole piece 130, so that the compound pole piece is obtained.
The winding assembly 300 comprises a pole piece winding roller 310, a release paper winding roller 320 and a winding driving mechanism, wherein the winding driving mechanism can drive the pole piece winding roller 310 and the release paper winding roller 320 to rotate, so that the pole piece winding roller 310 can wind the composite pole piece 150, and the release paper winding roller 320 can wind the release paper 160.
The unreeling driving mechanism, the compound driving mechanism and the reeling driving mechanism are mainly used for driving unreeling rollers, compression rollers or reeling rollers to rotate, and can comprise a motor, a hydraulic system, a transmission part and other components, wherein each roller can be independently driven by one driving mechanism so that the rotation speed can be independently adjusted; the same driving mechanism can drive a plurality of rollers of the corresponding assembly to synchronously rotate so as to simplify the control flow.
Because the lithium band 140 on the lithium band unreeling roller 120 gradually decreases along with the progress of the compounding process, the radius of the lithium band unreeling roller 120 and the radius of the lithium band 140 are gradually decreased, the release speed of the lithium band 140 gradually decreases under the condition that the rotating speed of the lithium band unreeling roller 120 is unchanged, and the material receiving speed of the compression roller to the lithium band 140 is constant during compounding, so that the lithium band 140 is easily broken, and the compounding effect of the lithium foil is further affected. Therefore, in order to solve the above-mentioned problems, an adjusting means for adjusting the degree of tension of the lithium belt 140 between the unreeling device and the compounding device is provided between the unreeling device and the compounding device. The adjusting assembly 400 is used for adjusting or maintaining tension of the lithium band 140, is arranged between the unreeling assembly 100 and the composite assembly 200, and can comprise a driving component and an adjusting component, wherein the adjusting component is used for applying force to the lithium band 140 to adjust the tensioning degree of the lithium band, the driving component is used for providing a power source for movement of the adjusting component, the adjusting component and the driving component can be directly connected, connection can also be realized through a transmission component, the transmission component is used for transmitting power of the driving component to the adjusting component to drive the adjusting component to move, and the transmission component can be a connecting rod mechanism, a gear or a chain wheel and the like. In some embodiments, the driving means may be a motor, a pneumatic device, or a hydraulic device, the adjusting means may be one or more rollers, and the tension of the lithium band 140 may be controlled by adjusting the distance between the rollers; in other embodiments, the adjustment assembly 400 may include a guide element for controlling the movement profile of the adjustment member.
The pole piece 130 lithium supplementing device comprises an unreeling assembly 100, a composite assembly 200 and a reeling assembly 300, wherein the unreeling assembly 100 is used for unreeling the pole piece 130 and the lithium strip 140; the pole piece 130 and the lithium band 140 can be unwound to facilitate the subsequent compounding step, and the compounding assembly 200 is disposed between the unreeling assembly 100 and the reeling assembly 300, and is used for pressing the unreeled pole piece 130 and lithium band 140 to obtain a compound pole piece 150; the tight coupling of the electrode sheet 130 and the lithium strip 140 can be achieved; the winding assembly 300 is used for winding the composite pole piece 150 and the release paper 160 of the lithium band 140; the lithium supplementing device can effectively reel the composite pole piece 150 and the lithium strip 140, is convenient for the subsequent battery processing step and the recovery step of the release paper 160, further comprises an adjusting component 400 arranged between the unreeling component 100 and the composite component 200 and used for adjusting the tensioning degree of the lithium strip 140 between the unreeling component 100 and the composite component 200, and can timely adjust the tensioning force when the tensioning force of the lithium strip 140 fluctuates to influence the composite process, so that the tensioning force is kept in a proper range, and breakage of the lithium strip 140 when the tensioning force is overlarge or fold generated when the tensioning force is overlarge is prevented, thereby improving the uniformity of the composite and the quality of the composite pole piece 150.
As shown in fig. 1, in one embodiment, the adjustment assembly 400 includes:
a tension roller 430 in contact with the lithium belt 140;
The first driving mechanism 410 is connected to the tension roller 430 for adjusting the position of the tension roller 430 to control the tension degree of the lithium band 140.
The tension roller 430 is a roller for adjusting tension of the lithium band 140 to avoid excessive slackening or tightening thereof, and its surface is in contact with the lithium band 140, and a certain force can be applied to the lithium band 140 by a change in position to adjust the degree of tension of the lithium band 140. The axis of the tensioning roller 430 may be parallel to the axis of the lithium band unreeling roller 120, the lithium band 140 released from the lithium band unreeling roller 120 enters between the two compression rollers through the tensioning roller 430, and the tensioning roller 430 is driven to change in position by the first driving mechanism 410, so as to adjust the tensioning degree of the lithium band 140. The tensioning roller 430 and the first drive mechanism 410 may be connected directly or via a transmission member.
In one embodiment, the first drive mechanism 410 is a motor and the adjustment assembly 400 further includes:
And one end of the connecting rod 420 is connected with the output end of the motor, and the other end of the connecting rod 420 is rotationally connected with the tensioning roller 430.
The motor has higher efficiency of converting electric energy into mechanical energy, and can adjust the output speed by adjusting current or frequency, thereby being beneficial to the control accuracy and easy to maintain. The first driving structure is set as a motor, so that the control is convenient, the maintenance cost of the device can be reduced, the connecting rod is arranged between the motor and the tensioning roller 430, one end of the connecting rod is fixed on an output shaft of the motor, and the other end of the connecting rod is rotationally connected with a connecting end part of the tensioning roller 430. Through the rotation of the motor driving connecting rod 420, the tensioning roller 430 is driven to rotate or swing by taking the output shaft of the motor as a rotating shaft, so that the position of the tensioning roller 430 can be adjusted, the tensioning degree of the lithium belt 140 can be adjusted, and the structure is low in complexity.
In one embodiment, the motor is a stepper motor that is used to adjust the rotational angle of the linkage 420.
The stepper motor can move at discrete step angles, and has the advantages of low speed, high torque, small volume and the like, and the position of the tension roller 430 can be controlled more precisely by adjusting the rotation angle of the connecting rod 420 through the stepper motor.
In one embodiment, the first drive mechanism 410 is a cylinder.
The cylinder can realize relatively large output force and torque, has good controllability, and has simple structure and easy maintenance, so the tensioning roller 430 can also directly drive the position change by taking the cylinder as the first driving mechanism 410 to realize the position adjustment of the tensioning roller 430.
In one embodiment, the adjustment assembly 400 further comprises:
The second driving mechanism is arranged at the output end of the first driving mechanism, is connected with the tensioning roller 430 and is used for driving the tensioning roller 430 to rotate around the axis and controlling the rotating speed of the tensioning roller 430.
The second driving structure is used for driving the tensioning roller 430 to rotate around the self axis, so that the rotation speed of the tensioning roller 430 is the same as the transportation speed of the lithium belt 140, and the friction force applied to the lithium belt 140 when the tensioning roller 430 contacts with the lithium belt 140 is reduced. The second drive structure may be a motor or the like.
In one embodiment, the adjustment assembly 400 includes:
a tension sensor 440 for detecting a real-time tension of the lithium belt 140;
and a controller electrically connected with the tension sensor 440 and the motor for adjusting a rotation direction and a rotation speed of the motor when the real-time tension is greater than a first preset tension threshold value, so that the tension roller 430 is far away from the lithium belt 140, and reducing the tension of the lithium belt 140.
The tension sensor 440 may be a strain gauge sensor, an inductance sensor, a piezoelectric sensor, or an optical sensor, and is disposed between the lithium band unreeling roller 120 and the pressing roller for detecting real-time tension of the lithium band 140. When the real-time tension detected by the tension sensor 440 is greater than the first preset tension threshold, the controller controls the regulating roller to move in the direction away from the lithium belt 140, so that the tension of the lithium belt 140 is reduced, the lithium belt 140 is prevented from being broken due to the excessive tension, and the uniformity of lithium supplement on the surface of the pole piece 130 is further ensured. The output signal of the tension sensor 440 may be voltage, current or optical signal according to the type of the sensor, and the controller performs corresponding processing and analysis according to the output signal, and adjusts the rotation speed of the motor according to the analysis result. The controller adjusts the action or the working parameters of the driving mechanism according to the signal of the tension sensor 440 as in the prior art, and will not be described in detail herein.
In one embodiment, the composite assembly 200 includes:
At least two first press rollers 210 for pressing the pole piece 130 and the lithium band 140;
The second press roller 220 is used for pressing the lithium belt 140 on the first press roller 210, and the second press roller 220 rotates along with the movement of the lithium belt 140.
As shown in fig. 1, the second press roller 220 is disposed between the first press roller 210 and the adjustment assembly 400, and may have a size smaller than that of the first press roller 210. The second press roller 220 is used to press the lithium band 140 against the press roller and rotates with the movement of the lithium band 140. Through the arrangement, the relative sliding between the release paper 160 on the lithium belt 140 and the first press roller 210 can be reduced, and the uniformity of lithium supplementing on the surface of the pole piece 130 is further ensured. The second press roller 220 may be made of a material having a certain anti-slip property, and the second press roller 220 may rotate with the transportation of the lithium belt 140 under the action of friction force, and when the friction force is too large, a driving mechanism may be provided for the second press roller 220 to reduce the resistance to the transportation of the lithium belt 140.
In one embodiment, the second pressure roller 220 is a rubber roller.
The rubber is relatively soft and has excellent elasticity, can provide uniform pressure and good buffering effect, has excellent anti-slip performance, is favorable for reducing the sliding of the lithium belt 140 in the compounding process, and is favorable for ensuring the stability of the compounding process. Thus, in some embodiments, the second pressure roller 220 is a rubber roller. The rubber roller may be integrally made of rubber, or may have a rubber layer on the surface. In other embodiments, the second pressing roller 220 may be provided with a polyurethane layer or a silica gel layer on the surface, and the polyurethane and the silica gel are soft, which also have the functions of providing uniform pressure and reducing the sliding of the lithium belt 140.
In one embodiment, the controller is further configured to adjust the rotational direction and rotational speed of the motor when the real-time tension is less than a second preset tension threshold, such that the tension roller 430 approaches the lithium band 140, increasing the tension of the lithium band 140. Referring to fig. 2, fig. 2 shows a schematic structural diagram of a pole piece lithium supplementing device in a lithium band loosening state according to an embodiment of the present application, in some embodiments, if a lithium band 140 tension force between a press roller and a lithium band unreeling roller 120 is poor, so that the lithium band 140 sags, a contact area between the lithium band 140 and a rubber roller becomes smaller, when the lithium band 140 moves, the rubber roller is not easy to drive the rubber roller to rotate, and the rubber roller applies a larger pressure to the lithium band 140, so that a lithium foil on the surface of the lithium band 140 is easy to be broken by the rubber roller, thereby affecting a lithium supplementing effect.
In order to solve the above problems, in the present application, when the real-time tension detected by the tension sensor 440 is lower than the preset range, the controller controls the adjusting roller to move against the lithium belt 140 towards the direction approaching to the lithium belt 140 so as to change the tension of the lithium belt 140, tension the lithium belt 140, ensure the contact area between the lithium belt 140 and the rubber roller, so as to drive the rubber roller to rotate, avoid the rubber roller from breaking the lithium foil, and further ensure the lithium supplementing effect of the pole piece 130.
In summary, according to the lithium supplementing composite mechanism for the pole piece 130 provided by the application, the tensioning force of the lithium belt 140 can be adjusted, so that the lithium belt 140 is prevented from being broken due to overlarge tensioning force; and also helps to avoid problems such as uneven size or peeling at the second press roller 220 due to too much loosening of the lithium band 140 caused by too little tension, so that the lithium supplementing effect of the pole piece 130 can be improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The utility model provides a pole piece moisturizing device which characterized in that, including unreeling subassembly, compound subassembly and rolling subassembly, wherein:
The unreeling assembly is used for unreeling the pole piece and the lithium belt;
The composite component is arranged between the unreeling component and the reeling component and is used for pressing the unreeled pole piece and the lithium belt to obtain a composite pole piece;
the winding component is used for winding the composite pole piece and the release paper of the lithium belt;
the lithium supplementing device further comprises an adjusting assembly arranged between the unreeling assembly and the composite assembly and used for adjusting the tensioning degree of the lithium belt between the unreeling assembly and the composite assembly.
2. The pole piece lithium replenishment device of claim 1, wherein the adjustment assembly comprises
A tension roller abutting the lithium belt;
And the first driving mechanism is connected with the tensioning roller and used for adjusting the position of the tensioning roller so as to control the tensioning degree of the lithium belt.
3. The pole piece lithium ion replenishing device of claim 2, wherein the first drive mechanism is a motor, the adjustment assembly further comprising:
And one end of the connecting rod is connected with the output end of the motor, and the other end of the connecting rod is rotationally connected with the tensioning roller.
4. A pole piece lithium supplementing device according to claim 3, wherein the motor is a stepper motor for adjusting the rotation angle of the connecting rod.
5. The pole piece lithium supplementing device of claim 2, wherein the first driving mechanism is a cylinder.
6. The pole piece lithium ion replenishing device of claim 2, wherein the adjustment assembly further comprises:
The second driving mechanism is arranged at the output end of the first driving mechanism, is connected with the tensioning roller and is used for driving the tensioning roller to rotate around the axis and controlling the rotating speed of the tensioning roller.
7. A pole piece lithium ion replenishing device according to claim 3, wherein the adjustment assembly comprises:
a tension sensor for detecting a real-time tension of the lithium belt;
And the controller is electrically connected with the tension sensor and the motor and is used for adjusting the rotation direction and the rotation speed of the motor when the real-time tension is larger than a first preset tension threshold value so that the tension roller is far away from the lithium belt and the tension force of the lithium belt is reduced.
8. The pole piece lithium replenishment device of claim 1, wherein the composite assembly comprises:
At least two first press rolls for pressing the pole piece and the lithium band;
And the second press roller is used for pressing the lithium belt on the first press roller, and the second press roller rotates along with the movement of the lithium belt.
9. The pole piece lithium supplementing device of claim 8, wherein the second press roller is a rubber roller.
10. The pole piece lithium replenishment device of claim 7, wherein the controller is further configured to adjust the rotational direction and rotational speed of the motor to bring the tensioning roller closer to the lithium strip to increase the tension of the lithium strip when the real-time tension is less than a second preset tension threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323380271.8U CN221551954U (en) | 2023-12-12 | 2023-12-12 | Pole piece lithium supplementing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323380271.8U CN221551954U (en) | 2023-12-12 | 2023-12-12 | Pole piece lithium supplementing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221551954U true CN221551954U (en) | 2024-08-16 |
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| CN202323380271.8U Active CN221551954U (en) | 2023-12-12 | 2023-12-12 | Pole piece lithium supplementing device |
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| CN (1) | CN221551954U (en) |
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