Anti-adhesion heating wire

Abstract

The utility model discloses an anti-adhesion heating wire, which comprises a heating wire body, an anti-adhesion coating and a sealing buffer pad, the heating area of the heating wire body is provided with the anti-adhesion coating, a sealing buffer area is formed between the side wall of the anti-adhesion coating and the heating wire body, and the sealing buffer pad is arranged in the sealing buffer area. According to the heating wire, the anti-sticking coating is arranged in the heating area of the heating wire body, so that foreign matters are not easy to stick, a melted mylar film is prevented from being stuck on the heating wire to influence the welding effect, and the welding yield of the mylar film is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating wire, especially to a heating wire preventing adhesion. BACKGROUND

[0002] The processing procedure of the lithium ion battery includes the batching and slurry mixing, coating, rolling, slitting, winding, assembling and baking, liquid injection, formation and capacity, testing and packaging procedures; the assembling section is subdivided into winding, baking, hot pressing, tab welding, Mylar (Mylar) packaging, peripheral welding, helium detection and the like. The main function of Mylar packaging is to wrap the insulating film on the aluminum shell before the battery cell enters the aluminum shell, and to weld the Mylar film (Mylar film) on the top cover of the battery cell to wrap the entire battery cell.

[0003] In the prior art, the surface of the heating wire is not treated, and after the Mylar film is welded, the surface of the heating wire will stick to the melted Mylar film, causing welding failure, and the Mylar film falling off affects the safety performance of the battery cell. INVENTION CONTENTS

[0004] The utility model aims at providing a heating wire preventing adhesion to solve the above technical problems.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A heating wire preventing adhesion, comprising a heating wire body, an anti-adhesion coating and a sealing buffer pad, the heating region of the heating wire body is provided with the anti-adhesion coating, a sealing buffer zone is formed between the side wall of the anti-adhesion coating and the heating wire body, and the sealing buffer pad is arranged in the sealing buffer zone.

[0007] Preferably, the anti-adhesion coating is a Teflon coating.

[0008] Preferably, the outer edge of the heating wire body is bent and arranged towards the middle part of the heating wire body.

[0009] Further preferably, the outer edge of the heating wire is bent by 180°.

[0010] Preferably, the thickness of the anti-adhesion coating is 0.5-0.7 mm.

[0011] Preferably, the cross section of the sealing buffer pad is triangular or trapezoidal.

[0012] Preferably, the sealing buffer pad is made of elastic material.

[0013] Preferably, the sealing buffer pad is in contact with the side wall of the anti-adhesion coating.

[0014] Preferably, the thickness of the anti-adhesion coating is the same as that of the sealing buffer pad.

[0015] Preferably, the heating wire is arranged in a rectangular cross-section along the thickness direction.

[0016] The technical scheme has the following advantages or beneficial effects:

[0017] In the utility model, through setting the anti-sticking coating in the heating area of the heating wire body, foreign matters are not easy to stick, and then the fused Mylar film is prevented from sticking on the heating wire to affect the welding effect, and the Mylar film welding yield is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure diagram of the anti-sticking heating wire in the utility model Figure 1 ;

[0019] Figure 2 is Figure 1 the enlarged view of A in the utility model

[0020] Figure 3 is the structure diagram of the anti-sticking heating wire in the utility model Figure 2 ;

[0021] Figure 4 is the distribution diagram of the heating area and the non-heating area on the heating wire in the utility model.

[0022] In the drawing: 1, heating wire body; 2, anti-sticking coating; 3, sealing buffer pad; 4, heating area; 5, non-heating area. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the protection scope of the utility model.

[0024] In the description of the utility model, it is necessary to explain that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like appear, the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, if the terms "first", "second", "third" appear, they are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the utility model, it is to explain, unless another explicit provision and limitation, if the term "installation", "connection", "connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skill in the art, the above-mentioned terms can be understood in the specific meaning of the utility model according to the specific circumstances.

[0026] Figure 1 It is the structure diagram of the heating wire of the utility model Figure 1 ; Figure 2 It is Figure 1 The enlarged view of A in Figure 3 It is the structure diagram of the heating wire of the utility model Figure 2 , Figure 4 It is the distribution diagram of the heating area and the non-heating area on the electric heating wire of the utility model;Please see Figures 1 to 4 , a preferred embodiment is shown, a kind of anti-adhesion heating wire is shown, including heating wire body 1, anti-adhesion coating 2 and sealing buffer pad 3, the heating area 4 of heating wire body 1 is provided with anti-adhesion coating 2, the side wall between anti-adhesion coating 2 and heating wire body 1 forms sealing buffer zone, and sealing buffer pad 3 is arranged in sealing buffer zone.In the embodiment, see Figure 1 , anti-adhesion coating 2 is provided with several, is distributed in the heating area 4 of heating wire body 1, and anti-adhesion coating 2 contacts Mylar film, since anti-adhesion coating 2 has the characteristics of not easy to stick foreign matter, can effectively reduce the bonding of Mylar film, improve Mylar film welding effect.Sealing buffer pad 3 is located on the non-heating area 5.

[0027] The distribution of heating area 4 and non-heating area 5 can see Figure 4 , wherein, heating wire body 1 can be wrapped with heat insulation material (such as ceramic fiber, mica sheet), and heat conduction is blocked, thereby forming non-heating area 5, and the remaining area without wrapping heat insulation material is heating area 4, and heat can be normally conducted. Or heating wire body 1 is divided into several independent circuit segments, and the on-off electricity of different areas is controlled by switch or relay, thereby forming the division of heating area 4 and non-heating area 5, for example, in use, the power-on area is heating area 4, and the power-off area is non-heating area 5.The forming mode of the above-mentioned heating area 4 and non-heating area 5 of electric heating wire body 1 is prior art, which will not be specifically described here.

[0028] The non-heating area 5 of the heating wire body 1 does not have the anti-sticking coating 2, and due to the setting of the anti-sticking coating 2, the thickness of the heating area 4 on the heating wire body 1 is greater than that of the non-heating area 5. In use, the anti-sticking coating 2 on the heating area 4 is in contact with the Mylar film, and the non-heating area 5 of the heating wire body 1 is not in contact with the Mylar film, and naturally does not bond the Mylar film.

[0029] In this embodiment, the sealing buffer pad 3 is made of an elastic material, specifically made of polytetrafluoroethylene. The use of polytetrafluoroethylene has the advantages of wear resistance, heat resistance, and non-stickness, and can be used for sealing the outer walls on both sides of the anti-sticking coating 2. When the anti-sticking coating 2 is stressed and deformed, the sealing buffer pad 3 can also be deformed to a certain extent, providing a buffering effect on both sides of the anti-sticking coating 2.

[0030] Further, as a preferred embodiment, the anti-sticking coating 2 is a Teflon coating, which can be used to bond the Mylar film and has high temperature resistance. The anti-sticking coating 2 is not limited to a Teflon coating and can also be made of other materials with high temperature resistance and non-stickness.

[0031] Further, as a preferred embodiment, the outer edge of the heating wire body 1 is bent towards the middle of the heating wire body 1 and forms a bent portion. The outer edge of the heating wire body 1 is bent by 180°, which can remove the sharp edges of the outer edge of the heating wire body 1. For details, see Figure 3 As shown, the anti-sticking coating 2 and the sealing buffer pad 3 are arranged on one side of the heating wire body 1, and the bent portion formed by the bending of the outer edge of the heating wire body 1 is located on the other side of the heating wire body 1.

[0032] Further, as a preferred embodiment, the thickness of the anti-sticking coating 2 is 0.5-0.7 mm. In this embodiment, the thickness of the anti-sticking coating 2 can be preferably 0.5 mm, and the specific thickness of the anti-sticking coating 2 can also be selected as needed.

[0033] Further, as a preferred embodiment, the cross section of the sealing buffer pad 3 is triangular or trapezoidal. In this embodiment, referring to Figure 2 As shown, the cross section of the sealing buffer pad 3 is triangular, which can increase the stability of the structure. In other embodiments, the cross section of the sealing buffer pad 3 can also be a right trapezoid or other shapes, which can be selected as needed.

[0034] Further, as a preferred embodiment, the sealing buffer pad 3 is in contact with the side wall of the anti-sticking coating 2 to achieve sealing of the side wall of the anti-sticking coating 2.

[0035] Further, as a preferred embodiment, the thickness of the anti-sticking coating 2 is the same as the thickness of the sealing cushion 3, so that the side wall of the anti-sticking coating 2 can be in full contact with the sealing cushion 3. Of course, in other embodiments, the thickness of the sealing cushion 3 can be smaller than the thickness of the anti-sticking coating 2, as long as the anti-sticking coating 2 can be limited. Figure 2 The thickness direction of the sealing cushion 3 is the up-down direction as shown. Figure 2 The thickness direction of the sealing cushion 3 is the up-down direction as shown.

[0036] Further, as a preferred embodiment, the cross section of the heating wire body 1 along the thickness direction is rectangular, which facilitates the stamping process for mass production of the heating wire body 1. The cross section of the heating wire body 1 can also be in other shapes, which can be selected according to the needs.

[0037] In use, the heating wire body 1 is connected with an external heating controller, and the heating controller controls the heating of the heating area 4 of the heating wire body 1. The anti-sticking coating 2 is in contact with the Mylar film, which can effectively reduce the adhesion of the Mylar film and improve the welding effect of the Mylar film.

[0038] The above description is only a preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. Those skilled in the art should realize that any equivalent replacement and obvious changes made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. An anti-blocking heating wire, characterized by, The heating wire body is provided with a heating area, the heating area is provided with an anti-sticking coating, a sealing buffer zone is formed between the side wall of the anti-sticking coating and the heating wire body, and the sealing buffer zone is provided with a sealing buffer pad.

2. The anti-blocking heating wire of claim 1, wherein, The anti-sticking coating is a Teflon coating.

3. The anti-blocking heating wire of claim 1, wherein, The outer edge of the heating wire body is bent towards the middle part of the heating wire body.

4. The anti-blocking heating wire of claim 3, wherein, The outer edge of the heating wire is bent by 180 degrees.

5. The anti-blocking heating wire of claim 1, wherein, The thickness of the anti-sticking coating is 0.5-0.7 mm.

6. The anti-blocking heating wire of claim 1, wherein, The cross section of the sealing buffer pad is triangular or trapezoidal.

7. The anti-blocking heating wire of claim 1, wherein, The sealing buffer pad is made of elastic material.

8. The anti-blocking heating wire of claim 1, wherein, The sealing buffer pad is in contact with the side wall of the anti-sticking coating.

9. The anti-blocking heating wire of claim 1, wherein, The thickness of the anti-sticking coating is the same as that of the sealing buffer pad.

10. The anti-blocking heating wire of claim 1, wherein, The cross section of the heating wire along the thickness direction is rectangular.

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