Pole piece feeding secondary detection positioning mechanism
By using a detection method combining high-position and low-position sensors in the positive electrode sheet feeding mechanism, the problem of low pole position detection accuracy in the prior art is solved, and a higher precision battery packing and forming quality is achieved.
Patent Information
- Application Number
- CN202421050388.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-15
AI Technical Summary
In the prior art, the electrode position detection accuracy of the positive electrode sheet is low, resulting in the packaging accuracy level being affected.
A secondary detection and positioning mechanism for the pole-plate feeding is designed, and the high-position sensor and the low-position sensor are combined to detect the pole-plate feeding mechanism before and after the positive pole-plate feeding mechanism. Reliable data is provided through two detections, and the position of the pole-plate feeding mechanism is calculated and adjusted.
The accuracy of the positive electrode plate pole ear position detection is improved, the high accuracy level of the battery cell packaging is ensured, and the quality of the battery cell molding is improved by controlling the electrode plate tension.
Smart Images
Figure CN222673103U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lithium battery manufacturing, in particular to a secondary detection and positioning mechanism for pole piece feeding. Background Art
[0002] like Figure 1 and Figure 2 As shown, the size of the positive ear of the positive electrode sheet from the edge of the battery cell L1 is one of the important parameters of the battery cell, which will directly affect the accuracy level of the later packaging. L1 is directly affected by the position of the positive ear in the entire positive electrode sheet during winding. The ideal state is that the positive ear is centered (that is, the positive ear is in the middle of the entire positive electrode sheet). The existing practice is to detect the position of the ear before the positive electrode sheet enters the positive electrode sheet feeding mechanism, and calculate the number of turns that the electrode sheet has been wound through a program to finally determine the approximate position of the ear after the battery cell is formed. The disadvantage of this method is that the detection position is too far away from the winding station and the accuracy is low. Utility Model Content
[0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is how to improve the detection accuracy of the tab position of the positive electrode sheet. The specific technical solution is as follows:
[0004] A secondary detection and positioning mechanism for electrode sheet feeding comprises a high-position sensor and a low-position sensor. The high-position sensor is installed above the positive electrode sheet feeding mechanism, and the high-position sensor is used to detect the position of the electrode ear of the electrode sheet before entering the positive electrode sheet feeding mechanism. The low-position sensor is located between the positive electrode sheet feeding mechanism and the winding needle mechanism, and the low-position sensor is used to detect the position of the electrode ear of the electrode sheet that comes out of the positive electrode sheet feeding mechanism and does not enter the winding needle mechanism.
[0005] As a preferred solution of the utility model, there are two high-position sensors which are relatively spaced apart from each other, and the pole piece passes between the two high-position sensors.
[0006] As a preferred solution of the utility model, each high-position sensor is installed on a high-position sensor mounting plate, and the high-position sensor mounting plate is installed on the side of the horizontal plate. The two high-position sensor mounting plates and the horizontal plate form a U shape, and the horizontal plate is above the positive electrode sheet feeding mechanism.
[0007] As a preferred solution of the utility model, there are two low-position sensors which are relatively spaced apart from each other, and the electrode sheet coming out of the positive electrode sheet feeding mechanism passes between the two low-position sensors.
[0008] As a preferred solution of the utility model, the low-position sensor is installed in the fixed block.
[0009] Beneficial effects: A high-position sensor is installed above the positive electrode sheet feeding mechanism. The high-position sensor is used to detect the position of the electrode tab before entering the positive electrode sheet feeding mechanism to complete the feeding action. During the winding process of the battery cell by the winding needle mechanism, the electrode tab reaches the low-position sensor position and the position of the electrode tab is captured again. The two detections provide reliable data so that the film making machine system can calculate the position of the electrode tab in the battery cell in advance, thereby ultimately adjusting the positive electrode tab position by controlling the electrode sheet tension. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the positive electrode sheet and the positive electrode ear;
[0011] Figure 2 This is a schematic diagram of the location of the tab in the battery cell;
[0012] Figure 3 It is the front view of the utility model;
[0013] Figure 4 It is a three-dimensional diagram of the utility model;
[0014] Figure 5 yes Figure 4 Magnified view at A in the middle;
[0015] Figure 6 yes Figure 4 Magnified view at B in the middle;
[0016] Figure 7 It is a schematic diagram showing the positions of the pole pieces and pole ears. DETAILED DESCRIPTION
[0017] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings:
[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have specific directions, be constructed and operated in specific directions. Therefore, they cannot be understood as limitations on the present invention.
[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0020] like Figures 3 to 7 As shown, a secondary detection and positioning mechanism for electrode sheet feeding includes a high-position sensor 1 and a low-position sensor 2. The high-position sensor 1 is installed above the positive electrode sheet feeding mechanism 3, and the high-position sensor 1 is used to detect the position of the pole ear of the electrode sheet before entering the positive electrode sheet feeding mechanism 3. The low-position sensor 2 is located between the positive electrode sheet feeding mechanism 3 and the winding needle mechanism 4. The low-position sensor 2 is used to detect the position of the pole ear of the electrode sheet coming out of the positive electrode sheet feeding mechanism 3 and not entering the winding needle mechanism 4. The positive electrode sheet feeding mechanism 3 is used to send the electrode sheet to the winding needle, and the winding needle mechanism 4 is used to wind the electrode sheet and the diaphragm into a battery cell. The positive electrode sheet feeding mechanism 3 and the winding needle mechanism 4 are both prior arts.
[0021] Specifically, there are two high-position sensors 1 and they are relatively spaced apart. The electrode piece passes between the two high-position sensors 1. One of the high-position sensors sends a signal and the other high-position sensor receives the signal. When the electrode ear passes through the obstruction, the other high-position sensor does not receive the signal, so it is known that the electrode ear has passed. Each high-position sensor 1 is installed on the high-position sensor mounting plate 5, and the high-position sensor mounting plate 5 is installed on the side of the cross plate 6. The two high-position sensor mounting plates 5 and the cross plate 6 form a U shape, and the cross plate 6 is above the positive electrode sheet feeding mechanism 3.
[0022] Specifically, there are two low-position sensors 2 that are relatively spaced apart from each other. The electrode sheet coming out of the positive electrode sheet feeding mechanism 3 passes between the two low-position sensors 2. The low-position sensor 2 is installed in the fixed block 7. The detection principle of the low-position sensor 2 is the same as that of the high-position sensor 1.
[0023] Before the positive electrode sheet enters the positive electrode sheet feeding mechanism 3, the high-level sensor 1 senses the pole ear and completes the feeding action. During the winding process of the battery cell, when the pole ear reaches the position of the low-level sensor 2, the winding needle mechanism 4 captures the position of the pole ear again, and the detection data is transmitted to the film making machine system. The system program then compares the size of the feeding distance. The pole ear position can be used to predict the pole sheet thickness deviation value, i.e., L1. At this time, by controlling the pole sheet tension, the tightness of the pole sheet winding core at the rear of the pole ear can be fine-tuned, thereby controlling the value of L1 from the edge.
[0024] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the utility model.
Claims
1. A secondary detection and positioning mechanism for pole piece feeding, characterized in that: It includes a high-position sensor and a low-position sensor. The high-position sensor is installed above the positive electrode sheet feeding mechanism. The high-position sensor is used to detect the position of the pole ear of the electrode sheet before it enters the positive electrode sheet feeding mechanism. The low-position sensor is located between the positive electrode sheet feeding mechanism and the winding needle mechanism. The low-position sensor is used to detect the position of the pole ear of the electrode sheet that comes out of the positive electrode sheet feeding mechanism and does not enter the winding needle mechanism.
2. A secondary detection and positioning mechanism for electrode feeding according to claim 1, characterized in that: There are two high-position sensors which are relatively spaced apart from each other, and the pole piece passes between the two high-position sensors.
3. A secondary detection and positioning mechanism for electrode feeding according to claim 2, characterized in that: Each high-position sensor is installed on a high-position sensor installation plate, and the high-position sensor installation plate is installed on the side of the horizontal plate. The two high-position sensor installation plates and the horizontal plate form a U shape, and the horizontal plate is above the positive electrode sheet feeding mechanism.
4. The electrode feeding secondary detection and positioning mechanism according to claim 1, characterized in that: There are two low-position sensors which are relatively spaced apart from each other, and the electrode sheet coming out of the positive electrode sheet feeding mechanism passes between the two low-position sensors.
5. A secondary detection and positioning mechanism for electrode feeding according to claim 4, characterized in that: The low level sensor is mounted in the fixing block.