Heating device for tab area of pole piece
By designing an adjustable pole-plate pole-ear heating device, the combination of thermal conductivity module and heat insulation parts is used to solve the problem of inflexible and accurate heating control in the prior art, and the flexibility and consistency of pole-ear heating are achieved.
Patent Information
- Application Number
- CN202421477435.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-25
AI Technical Summary
In the prior art, the heating control of the pole ear zone of the pole plate is not flexible and accurate enough, resulting in uneven heating and affecting the performance of the pole plate.
A pole-plate ear heating device is designed, including an adjustable shaft body, a thermal conduction module with multiple spacer sleeves, a driving member and a heat insulation member. The drive member drives the shaft body and the thermal conduction module to move away from or close to the pole plate, achieving flexible heating control; the heat insulation member blocks temperature transfer when heating is not required to reduce heat transfer.
It realizes more flexible and accurate control of the heating of the polar ear zone, avoids the excessive heating problem caused by long-term heating, and ensures the heating consistency of the polar ear zones at different locations.
Smart Images
Figure CN222883549U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery processing, and in particular to a heating device for a pole piece and a tab area. Background Art
[0002] The pole piece of a lithium battery is an important component of a lithium battery. During production, foil is usually used as a substrate, and active materials are coated on the foil for processing. The area coated with active materials is the coating area, and the area not coated with active materials is the pole ear area.
[0003] During production, the coating area needs to be compacted by a roller press. The coating area is thicker than the lug area because of the coating of active materials. During the rolling process, the coating area is subjected to greater pressure than the lug area, and its degree of elongation is also greater than the lug area. This can easily lead to irregular wrinkles at the junction of the coating area and the lug area, seriously affecting the performance of the pole piece. In order to make the coating area and the lug area stretch in the same direction, the pole piece is usually stretched in a post-stretching process. In this process, the lug area is heated separately to improve the ductility of the lug area, so that the extension of the lug area is consistent with the coating area during stretching, reducing the generation of wrinkles.
[0004] The heating device in the existing related technology includes a shaft body and a heat-conducting ring and a heat-insulating ring alternately sleeved on the outer wall of the shaft body along the axial direction of the shaft body. The heat-conducting ring corresponds to the pole lug area and heats the pole lug area, which can realize the precise heating process of the pole lug area, and the heat-insulating ring can reduce the influence between adjacent heat-conducting rings.
[0005] However, the current position of the shaft is difficult to adjust, resulting in the heating surface of the thermally conductive ring always being in contact with the pole piece and lug area. Currently, when heating is not required, it is achieved by interrupting the power supply to the thermally conductive ring. However, due to the large thermal capacity of the thermally conductive ring, even after the power supply to the conductive ring is interrupted, the thermally conductive ring will continue to transfer heat to the pole piece uninterruptedly, resulting in, for example, overheating of the foil after shutdown, affecting ductility; furthermore, it takes a certain amount of time for the thermally conductive ring to heat up to the appropriate temperature. During this period, the foil moves, and it is difficult to keep the heating temperature of the pole lug areas at different positions of the foil consistent.
[0006] That is, it is difficult to achieve flexible and accurate control of the heating of the pole piece in the related prior art. Utility Model Content
[0007] The present application provides a pole piece and pole tab region heating device to solve the current technical problem that the pole piece and pole tab region heating control is not flexible and accurate enough.
[0008] The present application provides a pole piece and tab region heating device, which has a first direction and a second direction intersecting each other, and the pole piece and tab region heating device comprises:
[0009] An axis body, wherein the axial direction of the axis body is parallel to the first direction;
[0010] A plurality of heat-conducting modules are sequentially and spaced apart from each other on the shaft along the first direction;
[0011] a driving member, the driving member being drivingly connected to the shaft body to drive the shaft body to move along the second direction;
[0012] A heat insulating member and a driving member, wherein the heat insulating member is arranged on one side of the heat conducting module in the second direction, and the driving member is transmission-connected to the heat insulating member to drive the heat insulating member to move, so that the heat insulating member can block at least a portion of the area of the positive projection of the heat conducting module in the second direction.
[0013] To implement the above technical solution, when the heating process stops, the driving member drives the shaft and the heat-conducting module to move away from the pole piece to avoid the heat-conducting module from heating the pole lug area for a long time. When heating is required, the heat-conducting module can be heated in advance when it is away from the pole piece, and the foil is started to run when the heat-conducting module is heated to the corresponding temperature, so as to ensure that the heating effect of the pole lug area at different positions of the foil is consistent, rather than heating in a contact state, which will cause the position where the foil is initially heated to be overheated; and when heat transfer from the heat-conducting module is not required, the heat insulation member can be placed between the heat-conducting module and the pole piece to minimize the heat transfer from the heat-conducting module. In summary, the use of this heating device can achieve more flexible and accurate control of the heating of the pole lug area.
[0014] As one of the optional embodiments of the present application, the thermal insulation member includes a first stopper and a second stopper, the driving member drives the first stopper and the second stopper to move toward each other, and the first stopper and the second stopper are assembled to form the thermal insulation member.
[0015] As one of the optional embodiments of the present application, it further includes an outer cover shell, which is arranged to cover the outside of the plurality of heat-conducting modules, and the outer cover shell has an opening on one side facing the heat insulating member.
[0016] To implement the above technical solution, the outer cover shell can provide protection on the one hand, avoiding direct contact between the operator and the heat-conducting module to ensure safety; on the other hand, when there is no need to heat the tab area, it reduces the heat radiation of the heat-conducting module to other areas, thereby reducing the impact of radiation temperature on other rolled components.
[0017] As one of the optional embodiments of the present application, a limit plate is fixedly provided on one side of the first stopper and the second stopper close to the shaft body, the driving member includes a moving part that moves along a straight line, the limit plate is fixedly connected to the moving part, and when the first stopper and the second stopper are assembled, the limit plate abuts against the outer side surface of the outer cover shell.
[0018] To implement the above technical solution, the first stopper and the second stopper are assembled together when the limit plate abuts against the outer cover shell, and the abutment between the limit plate and the outer cover shell is used to control the stroke of the driving member, thereby reducing the debugging process of the driving member.
[0019] As one of the optional embodiments of the present application, when the first stopper and the second stopper are assembled, the thermal insulation member closes the opening.
[0020] To implement the above technical solution, the cooperation between the outer cover shell and the thermal insulation component further more comprehensively seals the outer cover shell, so as to improve the insulation effect of the outer cover shell on the heat transfer of the thermal conductive module, reduce the heat transfer of the thermal conductive module to the outside world, and reduce the radiation temperature impact on other rolled components.
[0021] As one of the optional embodiments of the present application, there are at least two driving members and they are respectively arranged at the two ends of the shaft in the first direction. Each of the driving members includes a moving end, a fixed block is provided on the moving end, and the two ends of the shaft are rotatably arranged on the fixed block.
[0022] As one of the optional implementation schemes of the present application, the shaft body is further provided with a plurality of heat insulation modules along its own axial direction, and the heat insulation module is arranged between two adjacent heat conduction modules.
[0023] As one of the optional embodiments of the present application, conductive slip rings are also provided at both ends of the shaft body, and wire holes are opened on the thermal conductive module and the thermal insulation module along the axial direction of the shaft body. The conductive slip rings are provided with wires that pass through the wire holes and are electrically connected to the thermal conductive module to realize power supply.
[0024] As one of the optional embodiments of the present application, the thermal conduction module includes:
[0025] A heat-conducting ring, wherein the heat-conducting ring is sleeved on the outer side of the shaft;
[0026] A heating plate, wherein the heat-conducting ring is provided with concave mounting grooves at both end surfaces of its axial direction, the mounting grooves are connected with the threading holes, and the heating plate is embedded in the mounting grooves;
[0027] The electric wires on the conductive slip ring are electrically connected to the heating plate through the wire threading holes.
[0028] As one of the optional implementation schemes of the present application, a temperature measuring coil is coaxially provided on the inner circumferential side of the thermally conductive ring. The temperature measuring coil is used to detect the temperature of the thermally conductive ring. The temperature measuring coil is electrically connected to the conductive slip ring through the threading hole.
[0029] One of the above technical solutions has the following advantages or beneficial effects:
[0030] 1. The heat conduction module can be adjusted by the driving component to be close to or away from the pole piece, and the heat insulation component is used to block the temperature transfer. The heating state of the pole piece and the pole ear area can be flexibly controlled according to the needs. The heat insulation component is used to reduce the heat transfer to further increase the control means. The heat insulation component also has a certain structural design, such as the split type for easy installation and operation;
[0031] 2. The design of the heat insulation and the outer cover shell. The outer cover shell has a protective function and can limit the heat to a certain extent inside the outer cover shell, reducing the temperature impact on other external components. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.
[0033] Figure 1 is a top view of a related prior art heating device;
[0034] Figure 2 is a view of the pole piece and tab region heating device provided in Example 1 of the present application along a first direction;
[0035] Figure 3 This is an overall structural diagram of the pole piece and tab area heating device provided in Example 1 of the present application without the outer cover shell;
[0036] Figure 4 This is an overall structural diagram of the pole piece and tab area heating device provided in Example 1 of the present application;
[0037] Figure 5 It is an exploded structural diagram provided in Example 1 of the present application, mainly used to illustrate the connection relationship between the heat conduction module and the shaft body;
[0038] Figure 6 It is an exploded structure diagram provided in Example 1 of the present application and mainly used to represent a heat conduction module;
[0039] Figure 7 It is an exploded cross-sectional view provided in Example 1 of the present application, mainly used to represent the thermal conductive module.
[0040] Reference numerals: 11, shaft; 12, heat conduction module; 121, heat conduction ring; 1221, mounting groove; 122, heating plate; 13, heat insulation module; 14, conductive slip ring; 15, threading hole; 16, temperature measuring coil;
[0041] 2. Driving member; 2a. Moving end; 2b. Main body;
[0042] 3. heat insulation member; 31. first stop member; 32. second stop member;
[0043] 4. Driving member; 4a. Moving part; 4b. Fixed part;
[0044] 5. Outer shell; 51. Open;
[0045] 6. Limiting plate; 7. Fixing block;
[0046] 100, pole piece; 101, pole ear area;
[0047] X, first direction; Z, second direction; Y, third direction. DETAILED DESCRIPTION
[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.
[0050] Reference Figure 1 , which is a heating device for post-processing of the pole piece 100 pole lug region 101 in the related prior art, and the heating device comprises a shaft body 11, a heat conducting module 12 sleeved on the outer wall of the shaft body 11 along the axial direction of the shaft body 11, and a heat insulating module 13 arranged between adjacent heat conducting modules 12. The heat conducting modules 12 are in one-to-one contact with the pole lug region 101, and the contact heating of the pole lug region 101 is achieved by heating the temperature of the heat conducting modules 12.
[0051] At present, the position of the shaft 11 is difficult to adjust, resulting in the heating surface of the heat-conducting module 12 always being in contact with the pole piece 100 and the pole lug area 101. At present, when heating is not needed, it is achieved by interrupting the power supply of the heat-conducting module 12. However, since the heat capacity of the heat-conducting module 12 is large, even after the power supply to the heat-conducting module 12 is interrupted, the heat-conducting module 12 will continue to transfer heat to the pole piece 100 uninterruptedly, resulting in, for example, excessive heating of the foil after shutdown, affecting ductility; furthermore, it takes a certain amount of time for the heat-conducting module 12 to heat up to a suitable temperature, during which the foil moves, and it is difficult to keep the heating temperature of the pole lug areas 101 at different positions of the foil consistent.
[0052] The following is combined with Figure 2-7 The present application is further described.
[0053] Reference Figure 2 and Figure 3 , is a pole piece and tab region heating device provided by the present application, which has a first direction X and a second direction Z intersecting each other. In this embodiment, the first direction X and the second direction Z are perpendicular to each other. During use, the pole piece and tab region heating device is located on the side facing the pole piece 100 tab region 101 in the second direction Z, that is, the direction in which the heat conduction module 12 and the pole piece 100 tab region 101 face each other is defined as the second direction Z.
[0054] Reference Figure 2 and Figure 3 , the pole piece and lug region heating device comprises a shaft 11, a heat conducting module 12, a heat insulating module 13 and a driving member 2. The axial direction of the shaft 11 is parallel to the first direction X. There are multiple heat conducting modules 12, and the multiple heat conducting modules 12 are sequentially spaced and sleeved on the outer wall of the shaft 11 along the first direction X. There are multiple heat insulating modules 13 and they are also sleeved on the outer wall of the shaft 11. Specifically, at least one heat insulating module 13 is arranged between two adjacent heat conducting modules 12. During use, after the heat conducting module 12 is heated, its outer wall has a high temperature for contacting with the lug region 101 of the pole piece 100 for heating, and the heat insulating module 13 reduces the heat transfer between adjacent heat conducting modules 12 to reduce the thermal influence between adjacent heat conducting modules 12. The driving member 2 is connected to the shaft 11 in a transmission manner to drive the shaft 11 to move along the second direction Z. Specifically, in this embodiment, two driving members 2 are arranged and are respectively located at the two ends of the shaft 11 in the first direction X, and the driving member 2 is further arranged as a cylinder. Each driving member 2 includes a main body 2b and a moving end 2a, the moving end 2a being the end of the cylinder piston rod, each moving end 2a being arranged along the second direction Z pointing to the pole piece 100, and each moving end 2a being fixed with a fixing block 7. The two ends of the shaft body 11 are respectively rotatably arranged in the fixing block 7 to realize the rotation setting of the shaft body 11, so as to facilitate the adjustment of the outer peripheral side wall of the heat conducting module 12 to contact the pole piece 100 more evenly.
[0055] As described above, when the heating process stops, the driving member 2 drives the shaft 11 and the heat-conducting module 12 to move away from the pole piece 100 to avoid the heat-conducting module 12 from heating the pole lug area 101 for a long time. When heating is required, the heat-conducting module 12 can be heated in advance when the heat-conducting module 12 is away from the pole piece 100, and the foil is started to run when the heat-conducting module 12 is heated to the corresponding temperature, so as to ensure that the heating effect of the pole lug area 101 at different positions of the foil is consistent. Instead of heating the heat-conducting module 12 in the contact state, if the foil does not move at this time, the initial position where the foil contacts the heat-conducting module 12 will be heated too much; if the foil keeps running during the heating process of the heat-conducting module 12, when different positions in the forward direction of the foil contact the heat-conducting module 12, due to the different temperatures of the heat-conducting module 12, different areas in the forward direction of the foil are heated unevenly, affecting the quality of heat treatment.
[0056] Reference Figure 2 , Figure 3 and Figure 4 The pole piece and tab area heating device provided in the present application further includes a heat insulating member 3, an outer cover shell 5 and a driving member 4. The heat insulating member 3 is arranged on the side of the heat conducting module 12 in the second direction Z, specifically between the pole piece 100 and the heat conducting module 12, and the driving member 4 is connected to the heat insulating member 3 by transmission to drive the heat insulating member 3 to move, so that the heat insulating member 3 can block at least part of the area of the positive projection of the heat conducting module 12 in the second direction Z. The outer cover shell 5 is arranged outside the plurality of heat conducting modules 12 and the heat insulating module 13, and an opening 51 is opened on the side of the outer cover shell 5 facing the pole piece 100, and the opening 51 is used to prevent the driving member 2 from interfering with the shaft body 11 when driving the shaft body 11 to move along the second direction Z.
[0057] As mentioned above, the outer cover shell 5 can provide protection on the one hand, avoiding direct contact between the operator and the heat-conducting module 12, thus ensuring safety; on the other hand, when the lug area 101 does not need to be heated, it can reduce the heat radiation of the heat-conducting module 12 to other areas, thereby reducing the impact of the radiation temperature on other rolled parts. When the heat transfer of the heat-conducting module 12 is not required, the heat-insulating member 3 can be placed between the heat-conducting module 12 and the pole piece 100 to reduce the heat transfer of the heat-conducting module 12 to the lug area 101 of the pole piece 100. In summary, the use of this heating device can achieve more flexible and accurate control over the heating of the lug area 101.
[0058] Reference Figure 2 and Figure 3Furthermore, the heat insulating member 3 includes a first stopper 31 and a second stopper 32, both of which are configured as flat plates. The driving member 4 drives the first stopper 31 and the second stopper 32 to move toward each other. In this embodiment, the direction in which the first stopper 31 and the second stopper 32 move relative to each other is a third direction Y, which is perpendicular to the first direction X and the second direction Z at the same time. The first stopper 31 and the second stopper 32 are combined to form the heat insulating member 3. It should be noted that the third direction Y may also intersect with the first direction X and the second direction Z at the same time instead of being strictly perpendicular. The above setting of making the heat insulating member 3 into a split type is easier to install and debug, and occupies less space.
[0059] Furthermore, a limiting plate 6 is fixedly provided on one side of the first stopper 31 and the second stopper 32 close to the shaft body 11, and the limiting plate 6 is parallel to the second direction Z. Four driving members 4 are provided and evenly distributed on both sides of the shaft body 11 along the first direction X, and the two driving members 4 located on the same side of the shaft body 11 are respectively located at the two ends of the limiting plate 6 along the first direction X. Each driving member 4 includes a fixed portion 4b and a movable portion 4a, the fixed portion 4b remains stationary, and the movable portion 4a moves along the third direction Y. In this embodiment, the driving member 4 is configured as a cylinder, and the movable portion 4a is the end of the piston rod of the driving member 4. The limiting plate 6 is fixedly connected to the movable portion 4a, and the driving member 4 drives the movable portion 4a to move to drive the first stopper 31 and the second stopper 32 to move away from or approach each other along the third direction Y. When the first stopper 31 and the second stopper 32 are assembled, the limiting plate 6 abuts against the outer side surface of the outer cover shell 5. When the limit plate 6 abuts against the outer cover shell 5 , the first stopper 31 and the second stopper 32 are assembled together, and the abutment between the limit plate 6 and the outer cover shell 5 is utilized to control the travel of the driving member 4 , so as to reduce the debugging process of the driving member 4 .
[0060] Furthermore, when the first stopper 31 and the second stopper 32 are assembled, the heat insulating member 3 closes the opening 51, that is, when the first stopper 31 and the second stopper 32 are assembled, the first stopper 31 and the second stopper 32 are in contact with the outer cover shell 5 on one side thereof facing the outer cover shell 5. The cooperation between the outer cover shell 5 and the heat insulating member 3 further fully closes the outer cover shell 5, so as to improve the insulation effect of the outer cover shell 5 on the heat transfer of the heat conducting module 12, reduce the heat transfer of the heat conducting module 12 to the outside, and reduce the influence of the radiation temperature on other rolling parts.
[0061] Reference Figure 5-Figure 7, the two ends of the shaft body 11 in the first direction X are also sleeved with conductive slip rings 14, and the heat conductive module 12 and the heat insulating module 13 are provided with threading holes 15 along the first direction X. The conductive slip ring 14 is provided with wires passing through the threading holes 15 and electrically connected to the heat conductive module 12 to realize power supply. Each independent heat conductive module 12 includes a heat conductive ring 121, a heating plate 122 and a temperature measuring coil 16. Among them, the heat conductive ring 121 is sleeved on the outer wall of the shaft body 11, and the two end faces of the heat conductive ring 121 in the first direction X are provided with recessed mounting grooves 1221, the mounting grooves 1221 are connected with the threading holes 15, the heating plate 122 is embedded in the mounting grooves 1221, and the wires on the conductive slip ring 14 are electrically connected to the heating plate 122 through the threading holes 15. The temperature measuring coil 16 is coaxially arranged on the inner peripheral side of the heat conductive ring 121. The temperature measuring coil 16 is used to detect the temperature of the heat-conducting ring 121 . The temperature measuring coil 16 is connected to the conductive slip ring 14 through the threading hole 15 to achieve electrical connection.
[0062] The above description is only a partial implementation method of the embodiments of the present application and does not constitute any form of limitation on the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.
Claims
1. A pole piece and tab region heating device having a first direction (X) and a second direction (Z) intersecting each other, characterized in that: The pole piece and tab region heating device comprises: an axis body (11), wherein the axial direction of the axis body (11) is parallel to the first direction (X); A plurality of heat-conducting modules (12) are sequentially and spaced apart from each other on the shaft (11) along the first direction (X); A driving member (2), the driving member (2) being in driving connection with the shaft body (11) so as to drive the shaft body (11) to move along the second direction (Z); A heat insulating member (3) and a driving member (4), wherein the heat insulating member (3) is arranged on one side of the heat conducting module (12) in the second direction (Z), and the driving member (4) is transmission-connected to the heat insulating member (3) to drive the heat insulating member (3) to move, so that the heat insulating member (3) can shield at least a portion of the positive projection of the heat conducting module (12) in the second direction (Z).
2. The pole piece and tab region heating device according to claim 1, characterized in that: The heat insulating member (3) comprises a first stopper (31) and a second stopper (32); the driving member (4) drives the first stopper (31) and the second stopper (32) to move towards each other; the first stopper (31) and the second stopper (32) are assembled to form the heat insulating member (3).
3. The pole piece and tab region heating device according to claim 2, characterized in that: It also comprises an outer cover shell (5), the outer cover shell (5) being arranged to cover the outside of the plurality of heat-conducting modules (12), and an opening (51) being provided on a side of the outer cover shell (5) facing the heat-insulating component.
4. The pole piece and tab region heating device according to claim 3, characterized in that: A limiting plate (6) is fixedly provided on one side of the first stopper (31) and the second stopper (32) close to the shaft body (11); the driving member (4) comprises a moving portion (4a) that moves along a straight line; the limiting plate (6) is fixedly connected to the moving portion (4a); when the first stopper (31) and the second stopper (32) are assembled, the limiting plate (6) abuts against the outer side surface of the outer cover shell (5).
5. The pole piece and tab region heating device according to claim 4, characterized in that: When the first stopper (31) and the second stopper (32) are assembled, the heat insulating member (3) closes the opening (51).
6. The pole piece and tab region heating device according to claim 1, characterized in that: The driving members (2) are provided with at least two and are respectively arranged at the two ends of the shaft (11) in the first direction (X), each of the driving members (2) comprises a movable end (2a), a fixed block (7) is provided on the movable end (2a), and the two ends of the shaft (11) are rotatably arranged on the fixed block (7).
7. The pole piece and tab region heating device according to claim 1, characterized in that: The shaft body (11) is also sleeved with a plurality of heat insulation modules (13) along its own axial direction, and the heat insulation module (13) is arranged between two adjacent heat conduction modules (12).
8. The pole piece and tab region heating device according to claim 7, characterized in that: Both ends (1) of the shaft body (11) are also sleeved with conductive slip rings (14); the heat conduction module (12) and the heat insulation module (13) are provided with threading holes (15) along the axial direction of the shaft body (11); and the conductive slip ring (14) is provided with electric wires that pass through the threading holes (15) and are electrically connected to the heat conduction module (12) to realize power supply.
9. The pole piece and tab region heating device according to claim 8, characterized in that: The heat conduction module (12) comprises: A heat-conducting ring (121), wherein the heat-conducting ring (121) is sleeved on the outer side surface of the shaft body (11); A heating plate (122), wherein the heat-conducting ring (121) is provided with recessed mounting grooves (1221) on both end surfaces of the heat-conducting ring (121) in the axial direction, the mounting grooves (1221) are connected to the threading holes (15), and the heating plate (122) is embedded in the mounting grooves (1221); The electric wires on the conductive slip ring (14) are electrically connected to the heating plate (122) through the wire threading holes (15).
10. The pole piece and tab region heating device according to claim 9, characterized in that: A temperature measuring coil (16) is also coaxially disposed on the inner circumferential side of the heat conducting ring (121). The temperature measuring coil (16) is used to detect the temperature of the heat conducting ring (121). The temperature measuring coil (16) is electrically connected to the conductive slip ring (14) through the wire threading hole (15).