CN117174814A - Ring type heating roller for pole piece rolling and control system thereof - Google Patents
Ring type heating roller for pole piece rolling and control system thereof Download PDFInfo
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- CN117174814A CN117174814A CN202310917319.XA CN202310917319A CN117174814A CN 117174814 A CN117174814 A CN 117174814A CN 202310917319 A CN202310917319 A CN 202310917319A CN 117174814 A CN117174814 A CN 117174814A
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- heating
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- rolling
- assembly
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 159
- 238000005096 rolling process Methods 0.000 title claims abstract description 67
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 125000006850 spacer group Chemical group 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000001788 irregular Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 239000011888 foil Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
The invention relates to a ring type heating roller and a control system thereof, which mainly comprise a base and a rolling assembly arranged on the base, wherein the rolling assembly comprises an insulating spacer attached to a pole piece coating area and a heating ring attached to a pole piece lug area, a heating element for providing heat for the heating ring and a conductive assembly for supplying power to the heating element are further arranged on the rolling assembly, a sensor for detecting the temperature of the heating ring is further arranged on the rolling assembly, and the ring type heating roller further comprises a temperature control assembly in communication connection with the sensor. The ring type heating roller can independently complete heating and rolling work of the tab area, the heating unit is in close contact with the tab area of the pole piece, a space gap does not exist, ductility of the tab area of the pole piece is well improved, expansion uniformity of the tab area and a coating area is guaranteed, irregular folds of the pole piece are avoided, and production quality of the pole piece is guaranteed.
Description
Technical Field
The invention relates to the technical field of pole piece rolling, in particular to a ring type heating roller and a control system thereof.
Background
In an environment where fossil energy use is gradually limited, new energy gradually enters more and more application fields. The lithium battery is used as an important energy storage technology in the field of new energy, has the advantages of high energy density, long service life, quick charge, environmental protection and the like, and has wide application prospects in the fields of electric traffic, mobile equipment, renewable energy storage, energy storage systems, energy storage stations and the like. As technology advances and costs decrease, the application range of lithium batteries will continue to expand, and particularly, electric vehicles using lithium batteries as energy sources are gaining increasing acceptance and market share.
In the process of producing lithium batteries, an important technology is the manufacture of lithium battery pole pieces. The lithium battery pole piece refers to a positive electrode and a negative electrode in the battery, which are important components forming the lithium battery, and generally a foil is used as a substrate, active materials are coated on the foil at intervals, a region coated with the active materials is a coating region, and a region not coated with the active materials is a tab region. The coating area and the tab area have certain thickness difference, and the pole piece is required to be compacted by a roller press during production. Because the coating area is tightly attached to the roller press, the pressure of the roller press received by the coating area is larger than that of the lug area, and the extension degree of the coating area is also larger than that of the lug area, so that irregular folds of the pole piece are easily caused due to different extension degrees, and the performance of the pole piece is seriously affected. In the existing treatment process, the ductility of the tab area is generally improved by adopting a heating mode, so that irregular wrinkles are avoided.
Chinese patent publication No. CN115832165a discloses a rolling device and rolling method, which adopts a non-contact heating method to improve ductility of the tab region. The rolling device disclosed therein mainly comprises an extension roller for rolling the tab area of the pole piece and a heating unit for heating the tab area of the pole piece on the extension roller, wherein the heating unit is provided with a heating surface facing the extension roller, and the tab area of the pole piece on the extension roller is heated by the heating unit, so that the tab area is extended while being heated. In addition, a plurality of convex parts are further arranged on the extension roller, the heating units are correspondingly arranged with the convex parts, the convex parts are used for being abutted against the lug areas and rolling the lug areas, and the pole piece folds are favorably eliminated by matching the convex parts with the lug areas.
However, in the above design, although the pole tab area is subjected to the rolling treatment and is also subjected to the heating treatment, the probability of the occurrence of wrinkles on the pole piece is reduced to a certain extent, but the convex part of the extending roller for rolling the pole tab area and the heating unit of the rolling device are separately and independently designed, that is, certain space gaps exist between the convex part and the convex part, and the heating effect of the extending roller is affected by the angle set by the heating unit and the distance between the heating unit and the convex part, so that the defects of overheating or insufficient heating due to improper angle setting, improper coverage range setting of the heating unit or too short heating due to too short and too long distance between the heating unit and the pole tab area exist, and the ductility of the pole piece is not improved in place, so that the occurrence of irregular wrinkles cannot be avoided.
Disclosure of Invention
The invention aims to provide a ring-type heating roller for pole piece rolling and a control system thereof, wherein the ring-type heating roller can integrally and independently complete heating and rolling work of a pole lug area, a heating unit is closely contacted with the pole lug area of a pole piece, a space gap does not exist, the ductility of the pole lug area of the pole piece is well improved, the expansion uniformity of the pole lug area and a coating area is ensured, irregular folds of the pole piece are avoided, and the production quality of the pole piece is ensured.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a ring type heating roller for pole piece roll-in, contains the base and installs roll-in subassembly on the base, its characterized in that, roll-in subassembly contains the insulating spacer of laminating pole piece coating district and the heating ring of laminating pole piece tab district, still be provided with on the roll-in subassembly and be used for the heating piece that the heating ring provided heat and be used for the conductive component of heating piece power supply.
From this, the roll-in subassembly links to each other with the conductive component, and the conductive component is the heating element power supply that sets up in the roll-in subassembly, and the base is used for fixed support conductive component and roll-in subassembly. When the rolling operation is carried out, the insulating spacer bush on the rolling assembly is tightly pressed with the coating area of the pole piece, meanwhile, the heating ring is tightly pressed with the tab area of the pole piece, and the insulating spacer bush and the heating ring are respectively rolled in the pole piece areas corresponding to the insulating spacer bush and the heating ring. The heating piece can be a MCH type ceramic heating piece, the heating piece is small in size, thin in thickness and long in service life, the heating piece can be better attached to the heating ring, the heating piece is electrified to continuously generate heat when the heating roller works, high temperature is provided for the heating ring, and as the heating ring is tightly pressed with the tab area, a space gap does not exist, the high temperature can be directly transferred to the tab area of the pole piece, so that foil materials in the tab area can be better ductile, the pole piece is prevented from being wrinkled, and the requirement of standard extension degree is met.
Preferably, the radial thickness of the heating ring is greater than the radial thickness of the insulating spacer.
Because the tab area of the pole piece is not coated with active materials, a certain height difference exists between the tab area and the coating area, and the radial thickness of the heating ring is slightly larger than that of the insulating spacer, so that the heating ring can synchronously press the tab area when the insulating spacer presses the coating area, and the tab area can obtain better expansion effect.
Preferably, the plurality of heating rings are arranged along the axial direction of the rolling assembly, and comprise common heating rings and widened heating rings positioned at two axial ends of the rolling assembly, wherein the length of the widened heating rings in the axial direction of the rolling assembly is larger than that of the common heating rings in the axial direction of the rolling assembly.
In order to avoid the situation that the tab area foil is bent towards the center of the heating roller due to the fact that the width of the tab area is larger than the length of the heating ring in the axial direction of the rolling assembly when the tab areas on the two sides of the pole piece are rolled and extended, the heating ring can be divided into a common heating ring and a widened heating ring, the widened heating ring is responsible for rolling the tab areas on the two sides of the pole piece, the length of the heating ring in the axial direction of the rolling assembly is larger than the width of the tab areas on the two sides of the pole piece, and therefore flatness of the whole pole piece in the rolling process can be guaranteed.
Preferably, the rolling assembly further comprises a cable channel for receiving an energized cable.
The cable channel can be arranged in the rolling assembly and used for accommodating the power transmission line for supplying power to the heating element, and the power transmission line is arranged in the rolling assembly, so that the rolling assembly is beneficial to avoiding various interferences from the external environment, and the integration degree of the whole machine is higher.
Preferably, a sensor for detecting the temperature of the heating ring is further provided inside the heating ring.
The temperature sensor can adopt an industrial thermocouple, and has the advantages of wide temperature measurement range, high temperature measurement stability, quick response time, good corrosion resistance, relatively low cost and the like, and the temperature sensor is used for measuring the real-time temperature of the heating ring and transmitting the data to the temperature control assembly so as to help the temperature control unit to judge whether the temperature of the heating ring at the moment meets the set standard.
Preferably, the conductive assembly comprises a rotary ring mounted on the roller assembly, a stationary ring connected to the base, and a rotary conductive member connecting the two.
The fixed ring is arranged on the base, is static relative to the base, can stably transmit electric power from external power supply equipment to the rotating ring, and the rotating ring rotates along with the rolling assembly and is communicated with a power supply circuit of a heating element in the cable channel, and the fixed ring and the rotating ring can be connected by adopting a rotating conductive element such as an electric brush.
A control system for ring type heating roller of pole piece roll-in contains ring type heating roller, install on the roll-in subassembly be used for detecting the sensor of heating ring temperature still contain with sensor communication connection's control by temperature change subassembly, the control by temperature change subassembly contains and is used for adjusting the power adjustment unit of heating ring temperature.
The sensor arranged on the rolling assembly can monitor the surface temperature of the heating ring in real time, and transmits the temperature parameter information back to the temperature controller in the temperature control assembly, so that the temperature controller can feed back according to the temperature information, adjust the control signal in time, change the output power of the power adjusting unit electrically connected with the temperature controller, and further change the heating power of the heating element, so that the temperature of the heating ring connected with the heating element always accords with the set working standard.
Preferably, the temperature control assembly further comprises a voltage regulating unit connected with the power regulating unit.
When the temperature controller sends out a control signal to regulate the output power of the power regulating unit, the input voltage of the power regulating unit, which is electrically connected with the voltage regulating unit, needs to be changed, and the voltage regulating unit can be an electrodeless voltage regulator, so that the voltage at two ends of the power regulating unit can be regulated in an electrodeless manner, and the power regulating unit is flexible and stable.
Preferably, the temperature control assembly further comprises a monitoring unit for displaying current circuit information.
The monitoring unit can be a multipurpose ammeter, is connected to two ends of the heating element, and is used for displaying the voltage value, the current value and the power value of the two ends of the current heating element, so that the monitoring of working states of the machine by workers is facilitated.
Preferably, each heating ring corresponds to a set of independent temperature control components.
In order to more flexibly adapt to the states of pole piece lug areas under various different conditions, an assembly mode that one set of temperature control assembly corresponds to one heating ring is adopted, and each set of temperature control assembly can adjust the temperature of the heating ring controlled by the temperature control assembly in real time so as to enhance the applicability and flexibility of the ring type heating roller.
In summary, the invention has the following beneficial effects:
1. through the form of design into the heating ring with the part that is responsible for roll-in pole piece tab district, can realize in pole piece roll-in process, the tab district foil obtains better purpose of extension effect under the state of high temperature, and then makes the tab district extension degree after the roll-in unanimous with the coating district, has avoided the pole piece to appear irregular fold in the roll-in process to guarantee pole piece quality.
2. The radial thickness of the heating ring is greater than that of the insulating spacer bush, and the design can enable pole piece lug areas and coating areas with different thicknesses to be tightly pressed with the rolling device at the same time, so that the extension degree of the lug areas is matched with the coating areas when the coating areas are fully extended, the pole pieces can be rolled uniformly and fully, and irregular folds of the pole pieces are avoided.
3. The temperature of the heating ring is monitored in real time by using the sensor, and the temperature parameter is fed back to the temperature controller in the temperature control assembly in real time, so that the temperature controller can adjust the heating power of the heating element in time, further change the heating value, finally change the temperature of the heating ring, ensure that the temperature of the heating ring is always kept unchanged at the set standard value, and ensure that the expansion degree of the tab area is uniform and consistent in the rolling process.
4. Each heating ring is connected with a set of independent temperature control assembly, and when certain thickness uniformity difference exists in each tab area of the pole piece due to processing errors, the temperature of the heating ring corresponding to each tab area can be independently adjusted, so that the consistency of the overall ductility of the pole piece is realized.
Description of the drawings:
FIG. 1 is a schematic view of the present embodiment;
FIG. 2 is a partial schematic view of the present ring heated roller;
FIG. 3 is a side view of a heating ring on the present ring heated roller;
fig. 4 is a schematic diagram of the present ring heated roller control system.
In the figure:
1. the device comprises a base, 2, a rolling component, 21, an insulating spacer bush, 22, a heating ring, 23, a cable channel, 3, a conductive component, 31, a rotating ring, 32, a fixed ring, 4, a heating piece, 5, a temperature control component, 51, a power adjusting unit, 52, a voltage adjusting unit, 53, a monitoring unit, 6, a sensor, 7, a coating area, 8 and a lug area.
The specific embodiment is as follows:
the present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
The ring-type heating roller shown in fig. 1 mainly comprises a base 1, a rolling device 2 and a conductive device 3, wherein the rolling device 2 comprises an insulating spacer 21 corresponding to a coating area 7 and tightly pressed and a heating ring 22 corresponding to a tab area 8 and tightly pressed; the conductive device 3 comprises a rotating ring 31 fixedly connected with the rolling assembly 2 and a fixed ring 32 arranged on the base 1, and as shown in fig. 2, a cable channel 23 is further arranged inside the rolling assembly 2 and is used for accommodating a power-on cable.
As can be seen from the side view of the heating ring 22 shown in fig. 3, there is one or more heating elements 4 inside the heating ring 22, and a sensor 6 is mounted between the heating elements 4 and the heating ring 22 for measuring the real-time temperature of the heating ring 22.
As can be seen from fig. 1, the pole piece includes a coating region 7 and a tab region 8, which are disposed at a certain interval, and the edges of the two ends of the pole piece are tab regions. Before the rolling operation starts, firstly, the preheating operation of the heating ring 22 is performed, after the standard temperature is set by the staff, the temperature control assembly 5 shown in fig. 4 controls the heating element 4 to generate heat, the heating element 4 is tightly attached to the inner surface of the heating ring 22, and the heat generated by the heating element is directly transferred to the heating ring 22.
After the rolling operation starts, the pole piece is conveyed to the rolling assembly 2, at the moment, along with the forward movement of the pole piece, the insulating spacer bush 21 is tightly pressed with the pole piece coating region 7, the heating ring 22 is tightly pressed with the pole piece lug region 8, the rolling assembly 2 axially rotates, the insulating spacer bush 21 applies a certain pressure to the pole piece coating region 7, the heating ring 22 applies a certain pressure to the pole piece lug region 8, at the moment, the heat on the heating ring 22 is directly conducted to the pole lug region tightly pressed with the heating ring 22, and the ductility of the pole lug region is greatly enhanced.
In operation, the rotating ring 31 on the conductive assembly 3 rotates along with the roller assembly 2, and stable electric power is transmitted from the fixed ring 32 to the power transmission cable in the cable channel, and then transmitted to the heating element 4 through the power transmission cable. Meanwhile, the sensor 6 sends the real-time temperature parameter of the heating ring 22 measured by the sensor 6 to the temperature control component 5 as a feedback parameter for correcting the output signal of the sensor, if the feedback temperature parameter deviates from the set standard temperature parameter, the temperature controller in the temperature control component 5 transmits a control signal to the power adjusting unit 51, and adjusts the output power of the power adjusting unit 51 by changing the output voltage of the voltage adjusting unit 52 connected with the power adjusting unit 51 to the power adjusting unit 51, thereby changing the heating power of the heating element 4 connected with the power adjusting unit 51, the heating power of the heating element 4 is positively correlated with the heating value of the heating element, and the heating value of the heating ring 22 is from the heating element 4, so that the goal of changing the ring surface temperature of the heating ring 22 can be finally realized, the temperature of the heating ring 22 is enabled to be re-close to the set standard temperature parameter, and the working temperature of the heating ring 22 can be kept on the set standard temperature parameter continuously by repeating the process, so as to meet the heating requirement of the pole piece region.
In addition, the number of the heating rings 22 is multiple, and the heating rings are distributed at intervals along the axial direction of the rolling assembly 2, and comprise common heating rings and widened heating rings positioned at two axial ends of the rolling assembly 2, and because the length of the widened heating rings in the axial direction of the rolling assembly 2 is greater than that of the common heating rings in the axial direction of the rolling assembly 2, the rolled electrode tab areas on the edges of the pole pieces are more flat in the rolling process of the pole pieces by the widened heating rings, and the situation that foil materials of the electrode tab areas on the two sides of the pole pieces are bent towards the center of a heating roller due to the fact that the width of the electrode tab areas on the two sides of the pole pieces exceeds the length of the heating rings 22 in the axial direction of the rolling assembly 2 in rolling extension can be avoided.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (9)
1. The utility model provides a ring type heating roller for pole piece roll-in, contains base (1), installs roll-in subassembly (2) on base (1) its characterized in that, roll-in subassembly (2) contain insulating spacer (21) in laminating pole piece coating district and laminating pole piece tab district's heating ring (22), still be provided with on roll-in subassembly (2) for heating piece (4) and be used for heating piece (4) power supply conductive component (3) of heating ring (22).
2. A ring heated roller for pole piece rolling according to claim 1, characterized in that the radial thickness of the heating ring (22) is greater than the radial thickness of the insulating spacer (21).
3. Ring-type heating roller for pole piece rolling according to claim 2, characterized in that the heating rings (22) are arranged in plurality along the axial direction of the rolling assembly (2), and comprise common heating rings and widened heating rings at both axial ends of the rolling assembly (2), the length of the widened heating rings in the axial direction of the rolling assembly (2) is greater than the length of the common heating rings in the axial direction of the rolling assembly (2).
4. Ring heated roller for pole piece rolling according to claim 1, characterized in that the rolling assembly (2) further comprises a cable channel (23) for receiving an energized cable.
5. Ring-type heating roller for pole piece rolling according to claim 1, characterized in that the conductive assembly (3) comprises a rotating ring (31) mounted on the rolling assembly (2), a fixed ring (32) connected to the base (1) and a rotating conductive member connecting both.
6. Control system for a ring heated roll for pole piece rolling, comprising a ring heated roll according to any of claims 1-5, characterized in that the rolling assembly (2) is provided with a sensor (6) for detecting the temperature of the heating ring (22), and a temperature control assembly (5) in communicative connection with the sensor (6), the temperature control assembly (5) comprising a power regulating unit (51) for regulating the temperature of the heating ring (22).
7. A control system for a ring heated roller for pole piece rolling according to claim 6, characterized in that the temperature control assembly (5) further comprises a voltage regulating unit (52) connected to the power regulating unit (51).
8. A control system for a ring heated roller for pole piece rolling according to claim 6, characterized in that the temperature control assembly (5) further comprises a monitoring unit (53) for displaying current circuit information.
9. A control system for ring heated rolls for pole piece rolling according to claim 6, characterized in that each of said heating rings (22) corresponds to a separate set of said temperature control assemblies (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310917319.XA CN117174814A (en) | 2023-07-25 | 2023-07-25 | Ring type heating roller for pole piece rolling and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310917319.XA CN117174814A (en) | 2023-07-25 | 2023-07-25 | Ring type heating roller for pole piece rolling and control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117174814A true CN117174814A (en) | 2023-12-05 |
Family
ID=88936488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310917319.XA Pending CN117174814A (en) | 2023-07-25 | 2023-07-25 | Ring type heating roller for pole piece rolling and control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117174814A (en) |
-
2023
- 2023-07-25 CN CN202310917319.XA patent/CN117174814A/en active Pending
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