Lithium battery pole piece flattening mechanism
By setting cam assemblies and roller surface strips on the lithium battery electrode flattening roller, the problem of wrinkling and folding of the electrode during processing is solved, realizing highly efficient and automated electrode flattening, reducing costs and improving production efficiency.
Patent Information
- Application Number
- CN202422982269.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-04
AI Technical Summary
During the processing of lithium battery electrodes, they are prone to lateral contraction due to longitudinal stretching, resulting in wrinkles and folds, which affects the processing quality.
A flattening roller driven by a motor is used. The flattening roller is equipped with a cam assembly and roller surface strips. The cam assembly has a guide groove to realize the periodic outward lateral movement of the roller surface strips. The electrode sheet is automatically flattened by the guiding action of the cam guide rod.
It achieves highly efficient and automated electrode flattening, improving processing efficiency, reducing manufacturing costs, and minimizing maintenance.
Smart Images
Figure CN223442824U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lithium battery pole piece flattening technical field especially relates to a lithium battery pole piece flattening mechanism. BACKGROUND
[0002] Lithium battery pole piece thickness is thin, and the base material stiffness is insufficient, and when longitudinally stretching, the pole piece will shrink horizontally in the transmission process between various processing procedures, and the pole piece is prone to wrinkling. In addition, due to the uneven thickness of the pole piece, the pole piece is also prone to wrinkling. If these wrinkles are not eliminated in time, the pole piece may be damaged, affecting the processing procedure. UTILITY MODEL CONTENT
[0003] In view of the deficiencies of the prior art, the utility model provides a lithium battery pole piece flattening mechanism to overcome the deficiencies in the prior art.
[0004] To achieve the above object, the utility model realizes by the following technical scheme:
[0005] A lithium battery pole piece flattening mechanism driven by a motor includes a flattening roller.
[0006] A plurality of flattening modules are uniformly arranged on the circumference of the flattening roller, each flattening module includes two adjacent and oppositely arranged flattening units, and each flattening unit includes a cam assembly and a roller surface inlay strip.
[0007] The cam assembly includes a cylindrical cam and a cam driven rod; the circumferential surface of the cylindrical cam is provided with a guide groove; the guide groove has a specially treated wave curve profile in the width direction, so that when the cylindrical cam rotates to different angle positions, the wave curve profile is offset from the axial distance of the center of rotation of the cylindrical cam;
[0008] The cam driven rod is connected to the roller surface inlay strip at one end and is provided with a roller that cooperates with the guide groove at the other end.
[0009] Preferably, the cylindrical cam is coaxially fixed on the core shaft of the flattening roller.
[0010] Preferably, a first gear is arranged on the output shaft of the motor.
[0011] Further, the core shaft of the flattening roller is provided with a second gear corresponding to the first gear.
[0012] Preferably, the first gear and the second gear are connected by a synchronous belt.
[0013] Preferably, a key groove is arranged on the inner wall of the cylindrical cam.
[0014] Furthermore, a convex key is provided on the core shaft of the flattening roller, corresponding to the keyway on the cylindrical cam.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1) In this case, a lithium battery electrode flattening mechanism is provided with a guide groove on a cylindrical cam. The guide groove has a specially processed waveform curve profile in the width direction. Thus, through the guidance of the cam guide rod, the roller surface inlay has the function of periodically moving laterally outward and flattening the battery cell electrode, which is highly efficient.
[0017] 2) In this case, a lithium battery pole piece flattening mechanism is driven by a motor to automatically flatten the battery cell pole piece, with a high degree of automation and high efficiency.
[0018] 3) A lithium battery electrode flattening mechanism in this case has a simple structure, low production cost, and low subsequent maintenance.
[0019] In order to more clearly understand the present invention, the following will describe preferred implementations of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 、 Figure 2 It is a schematic diagram of the overall structure of the utility model;
[0021] Figure 3 for Figure 2 Enlarged view of part A in the middle;
[0022] Figure 4 、 Figure 5 It is a structural schematic diagram of the cylindrical cam of the present utility model.
[0023] Figure ID:
[0024] 1-motor, 2-flattening roller, 21-core shaft; 31-cylindrical cam, 311-guide groove, 32-cam follower rod, 33-roller; 4-roller surface strip; 5-first gear, 6-second gear. DETAILED DESCRIPTION
[0025] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.
[0026] In addition, if the terms "first", "second" and the like are used only for the purpose of description, they are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and therefore cannot be understood as indicating or implying the relative importance.
[0027] In addition, it should be noted that, unless otherwise specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements; for ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] Please refer to Figures 1-5 The utility model provides a kind of lithium battery pole piece flattening mechanism, including the flattening roller 2 driven by motor 1, flattening roller 2 is uniformly provided with several flattening module on circumference, every flattening module includes two adjacent and mutually opposite direction flattening unit, every flattening unit includes a cam assembly and a roll face inlay strip 4.
[0029] The cam assembly includes a cylindrical cam 31 and a cam follower rod 32.
[0030] The cylindrical cam 31 is coaxially fixed on the mandrel 21 of the flattening roller 2, and the circumferential surface of the cylindrical cam 31 is provided with a guide groove 311; the guide groove 311 has a specially treated wave curve profile in the width direction, so that when the cylindrical cam 31 rotates to different angular positions, the wave curve profile is offset from the axial distance of the center of rotation of the cylindrical cam 31.
[0031] The cam follower rod 32 is connected to the roll face inlay strip 4 at one end and provided with a roller 33 matched with the guide groove 311 at the other end.
[0032] The working principle of the flattening module is as follows:
[0033] When the roller 33 rolls in the guide groove 311, the roller 33 drives the cam follower 32 and the roll face insert 4 to make reciprocating movement in the same direction as the axis of the flattening roller 2 under the guidance of the wave-shaped curve profile of the guide groove 311. Since the two flattening units of the same flattening module are arranged in opposite directions, the two roll face inserts 4 in the two flattening units make relative reciprocating movement. Meanwhile, since the cylindrical cam 31 has the characteristic of linear change of radius, the roll face inserts 4 in different flattening modules can be in contact with the pole piece to be flattened at intervals. When the cam follower 32 drives the roll face insert 4 to make outward flattening movement, the roll face insert 4 contacts the lithium battery pole piece to be flattened, and when the cam follower 32 drives the roll face insert 4 to make inward resetting movement, the roll face insert 4 does not contact the pole piece, so that the flattening unit has the function of flattening the pole piece only outward.
[0034] Preferably, in the embodiment, a first gear 5 is arranged on the output shaft of the motor 1, and a second gear 6 is arranged on the core shaft 21 of the flattening roller 2 and corresponds to the first gear 5, and the first gear 5 and the second gear 6 are connected by a synchronous belt.
[0035] Preferably, in the embodiment, a key groove is arranged on the inner wall of the cylindrical cam 31 and corresponds to the key on the core shaft 21 of the flattening roller 2, so that the cylindrical cam 31 can rotate synchronously with the flattening roller 2.
[0036] The working process of the lithium battery pole piece flattening mechanism is as follows:
[0037] 1. After the motor 1 is started, the first gear 5 drives the second gear 6 through the synchronous belt, thereby driving the flattening roller 2 to rotate synchronously, and the flattening roller 2 drives the cylindrical cam 31 and the cam follower 32 to move;
[0038] 2. The cam follower 32 cooperates with the guide groove 311 to move to different angles, and under the action of the special wave-shaped curve profile of the guide groove 311, the roll face insert 4 has four-stage four-attitude movement trajectories, which are represented by DA-AB-BC-CD as follows:
[0039] DA near rest phase: at this stage, the contact position of the cam follower 32 and the cylindrical cam 31 is closest to the cam rotation center, at this time, the roll face insert 4 only rotates without moving horizontally;
[0040] AB approach phase: at this stage, the cam follower 32 and the contact position of the cylindrical cam 31 away from the cam rotation center more and more, the two groups of roll face inlay 4 are set in the opposite direction, while rotating, also respectively outward transverse movement, and at this time, under the action of cam different radius characteristics, the battery cell pole piece and roll face inlay 4 contact, under the action of friction, the battery cell pole piece is flattened outward by roll face inlay 4, realize the technical effect of eliminating the wrinkle;
[0041] BC far rest phase: at this stage, the cam follower 32 and the contact position of the cylindrical cam 31 away from the cam rotation center farthest, at this time, the roll face inlay 4 only rotates without transverse movement, and at this time, the battery cell pole piece and roll face inlay 4 surface separation;
[0042] CD approach phase: at this stage, the cam follower 32 and the contact position of the cylindrical cam 31 away from the cam rotation center more and more close, two groups of roll face inlay 4 rotate at the same time also move inwards transverse shrinkage;
[0043] The above four stages complete a motion cycle of the flattening module, under the continuous driving of the motor 1, the flattening module continues to flatten the battery cell pole piece.
[0044] Compared with the prior art, the lithium battery pole piece flattening mechanism of the case, by setting the guide groove on the cylindrical cam, the guide groove has a special treatment wave curve profile in the width direction, so that the roll face inlay has the function of moving outward periodically and automatically flattening the battery cell pole piece through the guidance of the cam guide rod, high efficiency.
[0045] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but can not be understood as limiting the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which belong to the protection scope of the present application.
Claims
1. A lithium battery electrode flattening mechanism, comprising a flattening roller (2) driven by a motor (1), characterized in that: The flattening roller (2) is evenly provided with a plurality of flattening module groups in the circumferential direction, each flattening module group includes two adjacent flattening units arranged in opposite directions, and each flattening unit includes a cam assembly and a roller surface insert (4); The cam assembly comprises a cylindrical cam (31) and a cam follower rod (32); a guide groove (311) is provided on the circumferential surface of the cylindrical cam (31); the guide groove (311) has a specially processed wave curve profile in the width direction, so that when the cylindrical cam (31) rotates to different angular positions, the wave curve profile and the axial distance of the rotation center of the cylindrical cam (31) form a wave offset; The cam follower rod (32) has one end connected to the roller surface strip (4) and the other end provided with a roller (33) matched with the guide groove (311).
2. A lithium battery pole piece flattening mechanism according to claim 1, characterized in that: The cylindrical cam (31) is coaxially fixed on the core shaft (21) of the flattening roller (2).
3. The lithium battery pole piece flattening mechanism according to claim 1, characterized in that: A first gear (5) is provided on the output shaft of the motor (1).
4. A lithium battery pole piece flattening mechanism according to claim 3, characterized in that: The core shaft (21) of the flattening roller (2) is provided with a second gear (6) corresponding to the first gear (5).
5. The lithium battery pole piece flattening mechanism according to claim 4, characterized in that: The first gear (5) and the second gear (6) are connected via a synchronous belt.
6. The lithium battery pole piece flattening mechanism according to claim 1, characterized in that: A keyway is provided on the inner wall of the cylindrical cam (31).
7. The lithium battery pole piece flattening mechanism according to claim 6, characterized in that: A convex key is provided on the core shaft (21) of the flattening roller (2) and corresponds to a keyway on the cylindrical cam (31).