Hot melting cutter

Abstract

The utility model relates to the technical field of hot melting cutters, in particular to a hot melting cutter and a battery module. The hot melting cutter comprises a first electrode, a second electrode, a fusible conductor and a heating body, and the first electrode and the second electrode are arranged at an interval; the fusible conductor is bridged between the first electrode and the second electrode; the heating body is located below the fusible conductor, the heating body is provided with a protruding face protruding in the direction close to the fusible conductor, the fusible conductor wraps at least part of the protruding face of the heating body, and the wrapped part of the heating body is tightly attached to the fusible conductor. Through the structural design of the heating body and the fusible conductor, the fusing effect can be effectively improved, and then the performance of the hot melting cutter is improved.

Description

Technical Field

[0001] This utility model relates to the field of thermomelt cutters, and in particular to a thermomelt cutter. Background Technology

[0002] A controlled thermal fuse is an overcurrent and overvoltage protection component, typically used in lithium-ion battery packs as a secondary protection device. It enables the battery to activate promptly when faced with overcurrent and overcharge risks, effectively reducing the risk of fire and explosion caused by overcharging, over-discharging, and short circuits in lithium-ion batteries, and keeping circuit and device damage to a minimum.

[0003] Currently, existing thermal fusion cutters typically use a sheet-like heating element in conjunction with a sheet-like fusible conductor mounted between the main circuit electrodes. The heating element heats and melts the fusible conductor, thereby cutting off the circuit connection of the main circuit electrodes and achieving a protective function. However, existing thermal fusion cutters also have limitations such as uneven heat concentration by the heating element, short creepage distance due to space constraints, and poor controlled melting effect, making them unsuitable for applications with higher precision and safety requirements. Utility Model Content

[0004] This utility model provides a thermosetting cutter and a battery module, which can solve at least one problem in the background art to improve the fusing effect of the thermosetting cutter, thereby effectively improving product performance.

[0005] In a first aspect, this utility model provides a thermoplastic cutter, which includes at least: a first electrode, a second electrode, a fusible conductor, and a heating element; the first electrode and the second electrode are spaced apart; the fusible conductor is connected between the first electrode and the second electrode; the heating element is located below the fusible conductor; the heating element has a protruding surface that protrudes toward the fusible conductor, and the fusible conductor covers at least a portion of the protruding surface of the heating element and the covered portion of the heating element is in close contact with the fusible conductor.

[0006] In some embodiments, the heating element includes a heating body and a heating pad, wherein the heating body has a heating contact surface formed on the side facing the fusible conductor, and the protruding surface is located on the heating contact surface.

[0007] In some embodiments, the protruding surface includes at least one of a single arc surface, multiple arc surfaces, multiple planes, and a combination of arc surfaces and planes; the fusible portion has a fusible contact surface formed on the side facing the heating element, and the heating element is in close contact with the fusible contact surface; the fusible contact surface includes a concave shape composed of at least one of a single arc surface, multiple arc surfaces, multiple planes, and a combination of arc surfaces and planes.

[0008] In some embodiments, a heating electrode is further included, which is located on one side of the heating element and is electrically connected to the heating element.

[0009] In some embodiments, the connecting portion includes a fusible portion and a connecting portion, the connecting portion including a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion extending from the fusible portion to both sides, the first connecting portion being electrically connected to the first electrode, the second connecting portion being electrically connected to the second electrode, and the first connecting portion and the second connecting portion being planar.

[0010] In some embodiments, the heating body is in the form of a hollow column, a cylindrical shape, a near-cylindrical shape, a polygonal column, or a column composed of one or more arc surfaces and / or planes.

[0011] In some embodiments, a fluxing agent is also included, which is located on the surface of the fusible conductor away from the heating element.

[0012] In some embodiments, the device further includes a housing, which includes an upper housing and a lower housing, the upper housing and the lower housing being fixedly connected, and the lower housing forming a heating element receiving portion; the heating element receiving portion includes a plurality of limiting blocks, and the heating element is engaged between the plurality of limiting blocks.

[0013] In some embodiments, the housing is further provided with a first electrode receiving groove and a second electrode receiving groove that penetrate the housing.

[0014] In some embodiments, the thermoplastic cutter further includes a sealing strip, the thickness of which in the middle is thinner than that at both ends; the sealing strip is disposed at one end of the first electrode near the fusible conductor, and / or, the sealing strip is disposed at one end of the second electrode near the fusible conductor.

[0015] The thermoelectric cutter provided by this utility model enhances the heat-gathering effect of the heating element and increases the creepage distance through the structural design of the heating element and fusible conductor, effectively improving the fusing effect and thus enhancing the performance of the thermoelectric cutter.

[0016] Other features and beneficial effects of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional exploded view of a thermoelectric cutter provided in an embodiment of the present invention;

[0019] Figure 2 This is a partial top sectional view of a thermoplastic cutter provided in an embodiment of the present invention;

[0020] Figure 3 This is a front sectional view of a thermoelectric cutter provided in an embodiment of the present invention;

[0021] Figures 4 to 10 Schematic diagrams of different modified embodiments of the fusible conductor provided by this utility model;

[0022] Figure 11 This is a schematic diagram of the structure of the lower shell in an embodiment of this utility model.

[0023] Figure label:

[0024] 10 – Heating element; 11 – Heating body; 12 – Heating pad; 13 – Heating electrode; 10a – Heating contact surface; 20 – Fusible conductor; 21 – Fusible part; 22 – First connection part; 23 – Second connection part; 20a – Fusible contact surface; 31 – First electrode; 32 – Second electrode; 40 – Outer shell; 41 – Upper shell; 42 – Lower shell; 40a – First electrode receiving groove; 40b – Second electrode receiving groove; 40c – Heating electrode receiving groove; 40d – Heating element receiving part; 50 – Sealing strip; 60 – Fusible flux. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The technical features designed in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that all terms used in this utility model (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains, and should not be construed as limiting this utility model; it should be further understood that the terms used in this utility model should be understood to have the same meaning as those in the context of this specification and in the relevant field, and should not be understood in an idealized or overly formal sense, except as expressly defined in this utility model.

[0027] Please see Figures 1-3 This utility model provides a thermoplastic cutter, which includes at least a first electrode 31, a second electrode 32, a heating element 10, and a fusible conductor 20. The first electrode 31 and the second electrode 32 are spaced apart; the fusible conductor 20 is connected between the first electrode 31 and the second electrode 32, so that the fusible conductor 20 is electrically connected to the first electrode 31 and the second electrode 32 respectively to form a mutually conductive main circuit; the heating element 10 is in contact with the fusible conductor 20, and the heating pad 12 is located between the heating body 11 and the fusible conductor 20.

[0028] Its working principle is as follows: When there is an overvoltage, the heating element 10 heats up, causing the fusible conductor 20 above it to melt, thus cutting off the main conducting circuit. At the same time, when there is an overcurrent, the fusible conductor 20 heats up and melts, thus cutting off the main conducting circuit.

[0029] In specific implementations, the first electrode 31 and the second electrode 32 are formed of conductive materials such as Ag and Cu, respectively. Furthermore, it is preferable to coat the surfaces of the first electrode 31 and the second electrode 32 with Ni / Au, Ni / Pd, or Ni / Pd / Au plating through a plating process to prevent oxidation of the first electrode 31 and the second electrode 32, and also to prevent the fusible conductor 20 from melting and eroding the first electrode 31 and the second electrode 32. Preferably, both the first electrode 31 and the second electrode 32 include a first end, a second end, and a narrow portion connecting the first end and the second end. The first end is used for electrical contact with the fusible conductor 20, and the second end is used for circuit connection in the main circuit. The first end, the second end, and the narrow portion are connected by slotting, cutting off a portion of the metal, or reducing the thickness to form a structure with a smaller cross-sectional area, thereby increasing the resistance at the electrode end, enabling faster heat generation, and achieving faster disconnection.

[0030] The heating element 10 includes a heating body 11 and heating pads 12 located on the heating body 11. The heating body 11 is made of an insulating material, such as ceramic, and contains a resistor. The heating pads 12 are made of a high-melting-point metal, such as one containing copper, silver, or nickel; the specific material is chosen based on actual requirements.

[0031] The fusible conductor 20 is preferably a low-melting-point metal material, such as SnAgCu-based Pb-free solder, BiPbSn alloy, BiPb alloy, BiSn alloy, SnPb alloy, PbIn alloy, ZnAl alloy, InSn alloy, PbAgSn alloy, etc. Of course, the fusible conductor 20 can also be a structure containing both high-melting-point and low-melting-point metals. The specific configuration depends on actual needs, and this embodiment is not limited to this.

[0032] Furthermore, in order to control the heating of the heating element 10, the thermoelectric cutter in this embodiment also includes a heating electrode 13. The heating electrode 13 is located on one side of the heating element 10 and is electrically connected to the heating element 10, so that when the thermoelectric cutter needs to be used, the heating element 10 is controlled to heat up through the heating electrode 13, thereby achieving the melting and cutting of the fusible conductor 20.

[0033] To address the issue of poor controlled melting performance in existing thermoelectric cutters, this embodiment improves the structure of the heating element 10 and the fusible conductor 20. Specifically, the heating element 10 has a raised surface that protrudes towards the fusible conductor 20. The fusible conductor 20 wraps around at least a portion of the raised surface of the heating element 10, and the wrapped portion of the heating element 10 is in close contact with the fusible conductor 20. Here, "wrapping" means that the fusible conductor 20 at least partially surrounds and adheres to the raised surface, forming a structure that surrounds and adheres to the raised surface. The surrounded and adhered portion has a certain height and its slope changes, rather than simply being a plane-to-plane adherence.

[0034] By designing at least a portion of the surface of the heating element 10 as a raised surface, the contact area between the heating element 10 and the fusible conductor 20 can be increased within a limited space. Simultaneously, when the heating element 10 heats up, the presence of the protrusions and the enclosure by the fusible conductor 20 ensure that the heat from the heating element 10 is concentrated at the contact point between the raised surface and the fusible conductor 20, effectively enhancing the heat-concentrating effect of the heating element 10. This allows the fusible conductor 20 to quickly absorb heat, thereby improving the controlled melting effect and increasing the response speed of the thermoelectric cutter.

[0035] Preferably, the heating element 10 includes a heating body 11 and a heating pad 12, wherein the heating body 11 has a heating contact surface 10a formed on the side facing the fusible conductor 20; the raised surface is located on the heating contact surface 10a, and the heating pad 12 at least covers the raised surface of the heating contact surface 10a and is in close contact with the fusible conductor 20.

[0036] In specific implementation, the heating contact surface 10a is defined as the surface of the heating body 11 facing the fusible conductor 20, and at least a portion of the surface of the heating contact surface 10a is a raised surface protruding towards the fusible conductor 20. That is, part or all of the surface of the heating contact surface 10a is a raised surface. The raised surface can be located at one or more locations on the heating contact surface 10a. In other words, there can be one or more raised surfaces on the heating contact surface 10a. In this embodiment, it is preferable that the raised surface is located in the middle of the heating contact surface 10a, and more preferably, the raised surfaces are evenly and symmetrically distributed on the heating contact surface 10a. The non-heating contact surface portion of the heating body 10 can be designed into any shape as needed, and is not limited here.

[0037] In addition, the heating pad 12 is disposed between the heating contact surface 10a with a raised surface and the fusible conductor 20, which can effectively increase the distance between the first electrode 31 and the second electrode 32, thereby effectively improving the insulation withstand voltage after breakage.

[0038] Preferably, the protruding surface comprises at least one of the following: a single arc surface, multiple arc surfaces, multiple planes, and a combination of arc surfaces and planes. For example... Figures 4-7 The raised surface on the heating contact surface 10a is an arc surface. Figure 8 , Figure 9 The raised surface of the heating contact surface 10a is a combination of multiple planes. Figure 10 The raised surface of the heating contact surface 10a can be a combination of curved and flat surfaces in different variations. The heating pad 12 at least covers the raised surface of the heating contact surface 10a. Therefore, the shape of the heating pad 12 is adapted to the shape of the raised surface or the heating contact surface 10a, and it also has a raised shape facing the fusible alloy side. The specific structure can be seen in the attached drawings, and will not be described further here.

[0039] Furthermore, the fusible conductor 20 has a fusible contact surface 20a formed on the side facing the heating element 10, and the heating element 10 is in close contact with the fusible contact surface 20a. When the heating element 10 heats up concentrated on the raised surface, the heat can be quickly conducted through the heating pad 12 to the fusible contact surface 20a, thereby effectively melting the fusible conductor 20. Preferably, the fusible contact surface 20a is a concave shape composed of one of the following: a single arc surface, multiple arc surfaces, multiple planes, or a combination of arc surfaces and planes. For example... Figures 4-7 The fusible contact surface 20a is a concave arc surface. Figure 8 , Figure 9 The fusible contact surface 20a is a concave shape composed of multiple planes. Figure 10 The fusible contact surface 20a can be a concave shape or a combination of curved and flat surfaces in various modified embodiments. That is, the shape of the fusible contact surface 20a can be adapted to the shape of the heating pad 12 and the heating contact surface 10a, and can be reasonably designed according to actual needs.

[0040] It should be noted that the structures of the heating contact surface 10a and the fusible contact surface 20a shown in the accompanying drawings are merely examples, and this embodiment is not limited thereto. Furthermore, based on this inventive concept, those skilled in the art can also design the heating contact surface 10a and the fusible contact surface 20a into other structures that can increase the contact area between the heating element 10 and the fusible conductor 20 or make the heat of the heating element 10 more concentrated at the contact position with the fusible conductor 20, all of which fall within the protection scope of this utility model.

[0041] Based on the above, preferably, the heating body 11 is in the form of a hollow column, cylinder, near-cylindrical shape, polygonal column, or column composed of one or more arc surfaces and / or planes; the cross-section of the heating body 11 is a regular polygon, annular, or elliptical shape, etc. For example... Figure 4 The heating element 11 is cylindrical. Figure 5 The heating element 11 is a hollow column. Figure 6 The heating element 11 is an elliptical cylinder. Figure 8 The heating element 11 is a polygonal column. Figure 7 , Figure 9 , Figure 10 The heating body 11 is a columnar shape formed by the combination of an arc surface and a plane. Preferably, the heating body 11 has an axisymmetric structure to ensure uniform heat conduction. In addition, the overall structure of the heating body 11 can also be any other strip-shaped structure, which is designed according to the actual application requirements, and this embodiment is not limited thereto.

[0042] In this embodiment, the heating element 10 is preferably cylindrical, the heating contact surface 10a is an arc surface that matches the cylindrical heating element 10, and the fusible contact surface 20a is an arc surface with a curvature less than or equal to that of the heating contact surface 10a, so as to facilitate contact with the heating pads 12 on the heating contact surface 10a. Preferably, the radius of the arc surface of the fusible contact surface 20a is greater than the radius of the arc surface of the heating contact surface 10a.

[0043] In an optional embodiment, the fusible conductor 20 includes a fusible portion 21 and a connecting portion, the connecting portion being electrically connected to the first electrode 31 and the second electrode 32, respectively; the fusible portion 21 and the connecting portion are not on the same horizontal plane; the heating pad 12 is shaped to match the fusible portion 21 and is in close contact with the fusible portion 21. That is, there is a height difference between the fusible portion 21 and the connecting portion. With this arrangement, when the fusible portion 21 melts, the increased creepage distance due to the height difference allows for rapid severing of the connection between the two electrodes in the fusible conductor 20, further improving the breaking capacity of the thermoelectric cutter.

[0044] Furthermore, the connecting portion of the fusible conductor 20 includes a first connecting portion 22 and a second connecting portion 23, wherein the first connecting portion 22 and the second connecting portion 23 extend from the fusible portion 21 to both sides, the first connecting portion 22 is electrically connected to the first electrode 31, and the second connecting portion 23 is electrically connected to the second electrode 32. In this embodiment, the first connecting portion 22 and the second connecting portion 23 are preferably planar to facilitate better contact with the first electrode 31 and the second electrode 32.

[0045] In an optional embodiment, the thermosetting cutter further includes a flux 60 located on the surface of the fusible conductor 20 away from the heating element 10. The flux 60 activates the oxide layer on the surface of the fusible conductor 20 at high temperatures and provides tension to the contraction of the fusible conductor 20, thus facilitating easier melting and cutting by the thermosetting cutter.

[0046] In other alternative embodiments, the thermoelectric cutter further includes a housing 40. The housing 40 has an internal cavity to accommodate the fusible conductor 20, the heating element 10, and the ends of the first electrode 31 and the second electrode 32. Further, the housing 40 includes an upper housing 41 and a lower housing 42, which are fixedly connected. The upper housing 41 and the lower housing 42 can be connected by, for example, rivets, and the space between the upper housing 41 and the lower housing 42 can be filled with materials such as epoxy resin or sealant to seal the thermoelectric cutter. Preferably, the lower housing 42 has a heating element receiving portion 40d; the heating element receiving portion 40d includes multiple limiting blocks, and the heating element 10 is snapped between the multiple limiting blocks. The limiting blocks are integrally formed with the lower housing 42. The specific structure of the limiting blocks can be designed according to the structure of the heating element 10, so that the heating element 10 can be confined between the limiting blocks without displacement. This embodiment is not limited to the structure shown in the accompanying drawings.

[0047] Furthermore, the housing 40 also has several interfaces that extend through the interior and exterior to facilitate the routing of wiring. After the housing 40 is assembled with the internal components of the thermoelectric cutter, the interfaces can be sealed with epoxy resin to protect the thermoelectric cutter.

[0048] Please see Figure 11 In this preferred embodiment, the outer shell 40 is further provided with a first electrode receiving groove 40a and a second electrode receiving groove 40a that penetrate the outer shell 40.

[0049] Specifically, the first electrode 31 is embedded in the first electrode receiving groove 40a, and the second electrode 32 is embedded in the second electrode receiving groove 40a. The first electrode 31 and the second electrode 32 can be fixed in the first electrode receiving groove 40a and the second electrode 32 can be fixed in the second electrode receiving groove 40a by epoxy resin. The structure of the first electrode receiving groove 40a and the second electrode receiving groove 40a can be designed to be adapted to the actual structure of the first electrode 31 and the second electrode 32.

[0050] The thermosetting cutter also includes a sealing strip 50, which is disposed at the first electrode receiving groove 40a near one end of the first electrode 31 close to the fusible conductor 20, and / or, the sealing strip 50 is disposed at the second electrode receiving groove 40a near one end of the second electrode 32 close to the fusible conductor 20. The sealing strip 50 is a soft insulating material, such as silicone. Preferably, the thickness of the sealing strip 50 in the middle is thinner than that at both ends. Designing the sealing strip 50 to be thinner in the middle and thicker at both ends facilitates pressure relief. In this embodiment, the upper housing 41 preferably has a pre-reserved sealing groove, and the sealing strip 50 is assembled onto the sealing groove.

[0051] The design of the sealing strip 50 not only provides dust and water protection, but also serves to release air during disconnection, thereby depressurizing the inside of the thermoelectric cutter, effectively protecting surrounding components, and improving the reliability of the thermoelectric cutter under overload conditions.

[0052] Preferably, the outer casing 40 also forms a heating electrode receiving groove 40c that penetrates the outer casing 40. The heating electrode 13 is embedded in the heating electrode receiving groove 40c, and can also be fixed in the heating electrode receiving groove 40c by epoxy resin.

[0053] It should be noted that, based on the above concept, and depending on the actual needs of the thermomelt cutter, those skilled in the art may also add other internal components to the thermomelt cutter, all of which fall within the protection scope of this utility model.

[0054] This utility model also provides a battery module employing the thermal fuse cut-off device described in any of the above embodiments. When the thermal fuse cut-off device designed in this solution is applied to the battery module, when an overcurrent occurs in the battery module, the current passing through the fusible conductor 20 will cause the conductor 20 to heat up and melt due to its internal resistance, thus passively cutting off the conductive circuit. When the battery module is at risk of overcharging, the thermal fuse cut-off device is activated, generating heat that causes the fusible conductor 20 to melt rapidly under the action of the flux 60, thereby cutting off the conductive circuit between the first electrode 31, the second electrode 32, and the heating pad 12. Through the melting action of the thermal fuse cut-off device, the out-of-control portion can be kicked out of the module, preventing further expansion of the out-of-control range, effectively reducing the possibility of fire or explosion caused by overcharging, over-discharging, or short circuits in the battery module, and keeping the damage to circuits and devices within a small area.

[0055] In summary, the thermal melt cutter and battery module provided by this utility model, through the structural design of the heating element 10 and the fusible conductor 20, can not only enhance the heat collection effect of the heating element and increase the creepage distance, effectively improving the melting effect, but also effectively improve the insulation withstand voltage after breaking, thereby enhancing the controllability and reliability of the thermal melt cutter.

[0056] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this utility model can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0057] Although this document frequently uses terms such as heating element, heating pad, first electrode, second electrode, fusible conductor, heating contact surface, fusible part, fusible contact surface, heating electrode, heating pad, sealing strip, flux, and casing, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model. The terms "first," "second," etc. (if present), in the description, claims, and accompanying drawings of the embodiments of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thermoforming cutter, characterized in that, include: A first electrode and a second electrode are arranged at an interval; A fusible conductor is connected between the first electrode and the second electrode; Heating element; located below the fusible conductor; The heating element has a raised surface that protrudes toward the fusible conductor, the fusible conductor covers at least a portion of the raised surface of the heating element, and the covered portion of the heating element is in close contact with the fusible conductor.

2. The thermosetting cutter according to claim 1, characterized in that: The heating element includes a heating body and a heating pad. The heating body has a heating contact surface on the side facing the fusible conductor, and the protruding surface is located on the heating contact surface.

3. The thermosetting cutter according to claim 1, characterized in that: The raised surface includes at least one of a single arc surface, multiple arc surfaces, multiple planes, and a combination of arc surfaces and planes; the fusible conductor has a fusible contact surface formed on the side facing the heating element, and the heating element is in close contact with the fusible contact surface; the fusible contact surface includes a concave shape composed of at least one of a single arc surface, multiple arc surfaces, multiple planes, and a combination of arc surfaces and planes.

4. The thermosetting cutter according to claim 1, characterized in that: It also includes a heating electrode, which is located on one side of the heating element and is electrically connected to the heating element.

5. The thermosetting cutter according to claim 1, characterized in that: The fusible conductor includes a fusible portion and a connecting portion. The connecting portion includes a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion extend from the fusible portion to both sides. The first connecting portion is electrically connected to the first electrode, and the second connecting portion is electrically connected to the second electrode. The first connecting portion and the second connecting portion are planar.

6. The thermosetting cutter according to claim 2, characterized in that: The heating element is in the form of a hollow column, a cylindrical shape, a near-cylindrical shape, a polygonal column, or a column composed of one or more arc surfaces and / or planes.

7. The thermosetting cutter according to claim 1, characterized in that: It also includes a fluxing agent located on the surface of the fusible conductor away from the heating element.

8. The thermosetting cutter according to claim 1, characterized in that: It also includes an outer shell, which includes an upper shell and a lower shell, the upper shell and the lower shell being fixedly connected, and the lower shell forming a heating element receiving portion; the heating element receiving portion includes multiple limiting blocks, and the heating element is snapped between the multiple limiting blocks.

9. The thermosetting cutter according to claim 8, characterized in that: The outer shell also has a first electrode receiving groove and a second electrode receiving groove that penetrate the outer shell.

10. The thermosetting cutter according to claim 1, characterized in that: The hot melt cutter includes a sealing strip, the thickness of which in the middle is thinner than that at both ends; the sealing strip is disposed at the end of the first electrode near the fusible conductor, and / or the sealing strip is disposed at the end of the second electrode near the fusible conductor.

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