Thermal composite pole piece detection mechanism
By designing a thermal composite electrode sheet detection mechanism, the conductor wheel contacts the electrode ear for state and short-circuit detection, the problems of errors in the state judgment of polar ear and high short-circuit detection in the prior art are solved, and more efficient and accurate detection is achieved. Reduced costs.
Patent Information
- Application Number
- CN202420827528.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In the manufacturing of power lithium-ion batteries, the prior art in the thermal composite lamination process is prone to errors in the judgment of the extreme ear state, and the cost is high, and the finished laminate core is scrapped during short circuit detection, which is high.
A thermal composite electrode sheet detection mechanism is designed, including a composite electrode sheet tape, an inductive induction mechanism and a transmission mechanism. The conductive wheel contacts the electrode ear to realize the electrode state and short-circuit detection, and avoid the scrapping of the entire stacked core.
It improves the accuracy of extreme ear state detection, reduces detection costs, avoids the scrapping of the entire stack core, and improves the efficiency and accuracy of detection.
Smart Images
Figure CN222461650U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power lithium-ion battery manufacturing, in particular to a thermal composite pole piece detection mechanism. Background Art
[0002] In the field of power lithium-ion battery manufacturing, the current thermal composite stacking process mainly adopts CCD visual photography to obtain the state of the pole lug during the transmission of the pole piece, and judges the state of the pole lug by comparing the area calculated by grabbing the edge of the pole lug with the theoretical pole lug area.
[0003] The above mode is prone to edge grabbing failure or misalignment, or misjudgment when the tab is warped, and the cost is high. In addition, for the hot composite lamination process, the industry currently mainly uses the finished laminated core for short circuit detection. When a short circuit occurs, the entire laminated core will be scrapped, and the scrapping cost is high. For this reason, the utility model proposes a hot composite pole piece detection mechanism. Utility Model Content
[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a thermal composite pole piece detection mechanism.
[0005] The utility model proposes a thermal composite pole piece detection mechanism, including a composite pole piece strip, wherein the composite pole piece strip is composed of a plurality of composite pole pieces, pole ears are left on both sides of the composite pole pieces, and the utility model is characterized in that it also includes an energized sensing mechanism and a transmission mechanism, wherein the transmission mechanism is used to transport the composite pole piece strip, and the energized sensing mechanism is arranged on a side of the composite pole piece away from the transmission mechanism.
[0006] Preferably, the composite electrode sheet comprises two separators, a plurality of positive electrode sheets and a plurality of negative electrode sheets, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are installed between the two separators.
[0007] Preferably, the transmission mechanism comprises a roller, and the roller is used to drive the composite pole piece strip to be transmitted.
[0008] Preferably, a plurality of insulating guide plates are provided on both sides of the composite pole piece strip, and the insulating guide plates are in contact with the pole tabs and guide the pole tabs to be transported.
[0009] Preferably, the power-on sensing mechanism includes a motor, a first signal sensing device, a second signal sensing device and a short-circuit detection device, an insulating transmission shaft is installed at one end of the motor output shaft, and the first conductive wheel, the second conductive wheel, the third conductive wheel and the fourth conductive wheel are respectively installed on the insulating transmission shaft, the first conductive wheel and the second conductive wheel are both electrically connected to the first signal sensing device, the third conductive wheel and the fourth conductive wheel are both electrically connected to the second signal sensing device, and the second conductive wheel and the third conductive wheel are both electrically connected to the short-circuit detection device.
[0010] Preferably, the first conductive wheel, the second conductive wheel, the third conductive wheel and the fourth conductive wheel all conflict with the pole lugs, wherein the first conductive wheel and the second conductive wheel conflict with one of the pole lugs, and the third conductive wheel and the fourth conductive wheel conflict with the other pole lug.
[0011] Preferably, the first signal sensing device forms a series circuit with the first conductive wheel and the second conductive wheel, the second signal sensing device forms a series circuit with the third conductive wheel and the fourth conductive wheel, and the short circuit detection device forms a series circuit with the second conductive wheel and the third conductive wheel.
[0012] In the present invention, the proposed thermal composite electrode detection mechanism has the following beneficial technical effects:
[0013] By bringing the first conductive wheel, the second conductive wheel, the third conductive wheel and the fourth conductive wheel into contact with the pole ear, it is possible to accurately detect whether the pole ear is folded or missing, and detect whether the composite pole piece is short-circuited. In abnormal situations, timely corrections or cutting and discarding can be made, and while improving the detection accuracy, the detection cost can be further reduced without causing the entire stacked core to be scrapped.
[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a side view of the structure of the utility model;
[0016] Figure 2 It is the front view of the structure of the utility model;
[0017] Figure 3 It is a schematic diagram of detecting normal pole lugs and abnormal pole lugs of the utility model;
[0018] Figure 4 It is a schematic diagram of the composition of the composite pole piece material strip of the utility model.
[0019] In the figure, 1. first conductive wheel; 2. second conductive wheel; 3. third conductive wheel; 4. fourth conductive wheel; 5. insulating guide plate; 6. insulating transmission shaft; 7. motor; 8. first signal sensing device; 9. second signal sensing device; 10. short circuit detection device; 11. composite pole piece strip; 12. pole ear; 13. composite pole piece; 14. roller; 15. diaphragm; 16. positive pole piece; 17. negative pole piece. DETAILED DESCRIPTION
[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0021] like Figure 1-Figure 4 A thermal composite electrode detection mechanism shown includes a composite electrode strip 11, the composite electrode strip 11 is composed of multiple composite electrode sheets 13, the composite electrode sheets 13 include two diaphragms 15, multiple positive electrode sheets 16 and multiple negative electrode sheets 17, the multiple positive electrode sheets 16 and multiple negative electrode sheets 17 are installed between the two diaphragms 15, and pole ears 12 are left on both sides of the composite electrode sheet 13. The above is the prior art and also includes an energized induction mechanism and a transmission mechanism. The transmission mechanism is used to transport the composite electrode strip 11, and the energized induction mechanism is arranged on the side of the composite electrode sheet 13 away from the transmission mechanism.
[0022] A further improvement of the technical solution is that the transmission mechanism includes a roller 14, which is used to drive the composite pole piece material strip 11 to be transmitted. The roller 14 is driven to rotate by an external driving member, such as an externally installed motor to drive the rotation. The composite pole piece material strip 11 is arranged on the roller 14, and one side of the composite pole piece material strip 11 is in contact with the roller 14. This is the prior art, and the roller 14 can be supported by an external bracket when in use.
[0023] A further improvement of the technical solution is that the transmission mechanism can be replaced by other existing transmission structures that can realize the transmission of the composite pole piece strip 11.
[0024] A further improvement of the technical solution is that a plurality of insulating guide plates 5 are provided on both sides of the composite pole piece strip 11, the insulating guide plates 5 are in contact with the pole lugs 12 and guide the pole lugs to be transmitted, and the insulating guide plates 5 can be installed by an external bracket during use.
[0025] A further improvement of the technical solution is that the power-on sensing mechanism includes a motor 7, a first signal sensing device 8, a second signal sensing device 9 and a short-circuit detection device 10. The motor 7 can be supported by an external bracket when in use. An insulating transmission shaft 6 is installed at one end of the output shaft of the motor 7. The first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 are respectively installed on the insulating transmission shaft 6. The motor 7 is used to drive the insulating transmission shaft 6 to rotate. The first conductive wheel 1 and the second conductive wheel 2 are both electrically connected to the first signal sensing device 8, the third conductive wheel 3 and the fourth conductive wheel 4 are both electrically connected to the second signal sensing device 9, and the second conductive wheel 2 and the third conductive wheel 3 are both electrically connected to the short-circuit detection device 10.
[0026] The outer diameters of the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 are consistent in size, ranging from 10mm to 50mm, and the widths of the conductive wheels are consistent in size, ranging from 1-4mm. The conductive wheels are all made of metal and have conductivity. The outer layer or the entirety of the insulating transmission shaft 6 is made of non-metallic material, which is insulated from the conductive wheels and has no conduction capability.
[0027] Specifically, the motor 7 drives the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 to rotate through the insulating transmission shaft 6, and rotates at the same speed. The motor 7 drives the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 to rotate at the same speed as the composite pole piece strip 11. At this time, the pole ear 12 is transmitted through the composite pole piece strip 11 through the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 respectively.
[0028] The first conductive wheel 1 , the second conductive wheel 2 , the third conductive wheel 3 and the fourth conductive wheel 4 all conflict with the pole tab 12 , wherein the first conductive wheel 1 and the second conductive wheel 2 conflict with the negative pole tab 12 , and the third conductive wheel 3 and the fourth conductive wheel 4 conflict with the positive pole tab 12 .
[0029] Specifically, the first conductive wheel 1 is between 1mm and 3mm from the outer edge of the negative pole tab 12, the second conductive wheel 2 is between 1mm and 3mm from the root of the negative pole tab 12, the third conductive wheel 3 is between 1mm and 3mm from the outer edge of the positive pole tab 12, and the fourth conductive wheel 4 is between 1mm and 3mm from the root of the positive pole tab 12. The root of the pole tab refers to the connecting part between the pole tab and the pole piece, and the outer edge of the pole piece refers to the side away from the root of the pole tab.
[0030] During operation, when the first conductive wheel 1 and the second conductive wheel 2 are in contact with the positive electrode tab 12 , the third conductive wheel 3 and the fourth conductive wheel 4 are in contact with the negative electrode tab 12 .
[0031] A further improvement of the technical solution is that the first signal sensing device 8 forms a series circuit with the first conductive wheel 1 and the second conductive wheel 2, and the second signal sensing device 9 forms a series circuit with the third conductive wheel 3 and the fourth conductive wheel 4, and whether the tab is folded or missing is confirmed by the duration of the induced current signal or by converting it into the tab width;
[0032] like Figure 3As shown, specifically, when the pole ear 12 is not folded or missing, during the entire process of the pole ear 12 passing through the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 at a specific speed, the entire series circuit is in a conducting state. At this time, the first signal sensing device 8 and the second signal sensing device 9 will obtain a conduction signal of a specific time length, or the width of the pole ear 12 is obtained by converting the signal conduction time length with the transmission speed of the composite pole piece material strip 11. At this time, by comparing the conduction signal time length when the pole ear 12 state is normal under the theoretical specific speed state or comparing it with the theoretical pole ear 12 width, it can be determined that the pole ear 12 is Normal state; when the pole lug 12 is folded or missing, during the whole process of the pole lug 12 passing through the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 at a specific speed, the conduction time of the whole series circuit is shortened or completely non-conductive compared with the conduction time when the pole lug is in a normal state. At this time, the first signal sensing device 8 and the second signal sensing device 9 obtain a specific conduction time length, or a specific pole lug 12 width obtained by conversion, and compare it with the conduction signal time length when the pole lug 12 is in a normal state under the theoretical specific speed state or compare it with the theoretical pole lug 12 width, then it can be determined that the pole lug 12 is in an abnormal state;
[0033] The first signal sensing device 8 and the second signal sensing device 9 collect data and determine the status of the negative electrode tab 12 and the positive electrode tab 12 respectively. When the tab 12 is abnormal, the first signal sensing device 8 and the signal sensing device 9 feed back the abnormal data to the external stacking machine control end, and the machine performs an automatic shutdown alarm. When the tab 12 is folded, it is manually smoothed. When the tab 12 is missing, the composite electrode is cut in time to avoid waste of raw materials.
[0034] The first signal sensing device 8 and the second signal sensing device 9 are signal sensors in the prior art, which can obtain a conduction signal of a specific time length, or obtain the width of the pole ear 12 by converting the signal conduction time length and the transmission speed of the composite pole piece strip 11.
[0035] A further improvement of the technical solution is that the short-circuit detection device 10 forms a series circuit with the second conductive wheel 2 and the third conductive wheel 3, and short-circuit detection is performed by contact between the conductive wheel and the pole lug.
[0036] Specifically, the second conductive wheel 2 and the third conductive wheel 3 are in contact with the negative pole tab 12 and the positive pole tab 12 respectively, and short-circuit detection is performed by contacting the second conductive wheel 2 and the third conductive wheel 3 with the pole tab 12; specifically, when the pole tab 12 is not missing, in the process of the pole tab 12 passing through the second conductive wheel 2 and the third conductive wheel 3 at a specific speed, the entire series circuit is in a conducting state, and at this time, the short-circuit detection device 10 performs short-circuit detection on the composite composite pole sheet 13 on the composite pole sheet material strip 11. When the short-circuit detection is abnormal, the short-circuit detection device feeds back the abnormal data to the external lamination machine control end, performs an automatic shutdown alarm through the machine, and cuts the composite pole sheet.
[0037] The short circuit detection device 10 is a short circuit detector in the prior art.
[0038] By bringing the first conductive wheel 1, the second conductive wheel 2, the third conductive wheel 3 and the fourth conductive wheel 4 into contact with the pole ear 12, it is possible to accurately detect whether the pole ear 12 is folded or missing, and detect whether the composite pole piece 13 is short-circuited, so as to timely correct or cut and discard the abnormal situation, further reduce the detection cost and save the raw material cost while improving the detection accuracy, and have high environmental adaptability.
[0039] The detection mechanism is mainly used for lug detection and short circuit testing of thermal composite stacks.
[0040] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0041] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A thermal composite electrode detection mechanism, comprising a composite electrode material strip (11), wherein the composite electrode material strip (11) is composed of a plurality of composite electrode pieces (13), and electrode ears (12) are left on both sides of the composite electrode pieces (13), characterized in that: It also includes an energizing induction mechanism and a transmission mechanism, wherein the transmission mechanism is used to transport the composite pole piece material strip (11), and the energizing induction mechanism is arranged on a side of the composite pole piece (13) away from the transmission mechanism.
2. The thermal composite electrode detection mechanism according to claim 1, characterized in that: The transmission mechanism comprises a roller (14), and the roller (14) is used to drive the composite pole piece strip (11) to be transmitted.
3. The thermal composite electrode detection mechanism according to claim 1, characterized in that: A plurality of insulating guide plates (5) are provided on both sides of the composite pole piece strip (11), and the insulating guide plates (5) are in contact with the pole tabs (12) and guide the pole tabs (12) to be transported.
4. The thermal composite electrode detection mechanism according to claim 1, characterized in that: The power-on induction mechanism comprises a motor (7), a first signal induction device (8), a second signal induction device (9) and a short-circuit detection device (10); an insulating transmission shaft (6) is mounted on one end of the output shaft of the motor (7); a first conductive wheel (1), a second conductive wheel (2), a third conductive wheel (3) and a fourth conductive wheel (4) are mounted on the insulating transmission shaft (6); the first conductive wheel (1) and the second conductive wheel (2) are both electrically connected to the first signal induction device (8); the third conductive wheel (3) and the fourth conductive wheel (4) are both electrically connected to the second signal induction device (9); and the second conductive wheel (2) and the third conductive wheel (3) are both electrically connected to the short-circuit detection device (10).
5. The thermal composite electrode detection mechanism according to claim 4, characterized in that: The first conductive wheel (1), the second conductive wheel (2), the third conductive wheel (3) and the fourth conductive wheel (4) are all in contact with the pole lug (12).
6. The thermal composite electrode detection mechanism according to claim 4, characterized in that: The first signal sensing device (8) forms a series circuit with the first conductive wheel (1) and the second conductive wheel (2), the second signal sensing device (9) forms a series circuit with the third conductive wheel (3) and the fourth conductive wheel (4), and the short circuit detection device (10) forms a series circuit with the second conductive wheel (2) and the third conductive wheel (3).
7. The thermal composite electrode detection mechanism according to claim 1, characterized in that: The composite electrode sheet (13) comprises two diaphragms (15), a plurality of positive electrode sheets (16) and a plurality of negative electrode sheets (17), wherein the plurality of positive electrode sheets (16) and the plurality of negative electrode sheets (17) are installed between the two diaphragms (15).