Ceramic ptc surface structure

Abstract

The utility model discloses a kind of ceramic PTC surface structures, including ceramic PTC heating sheet and adhesion insulating part, the adhesion insulating part is equipped with the four around side walls of the ceramic PTC heating sheet.By increasing adhesion insulating part on ceramic PTC side surface, its surface pollution degree is reduced, simultaneously, the creepage distance between the two electrode surfaces of ceramic PTC increases the distance of silica gel surface, so as to improve the voltage-withstanding capability of ceramic PTC to meet the practical application field of 1000V DC voltage use.

Description

Technical Field

[0001] This utility model relates to the field of ceramic PTC sheet technology, and more specifically, to a ceramic PTC surface structure. Background Technology

[0002] The ceramic PTC sheet, the heating element of the PTC heater for new energy vehicles, currently has a mainstream thickness of 2.4mm, 3.0mm, and 3.5mm, and is mainly matched with voltage platforms of 350V DC, 450V DC, and 600V DC.

[0003] With the development of fast charging technology for new energy vehicles, the voltage platform has evolved to 800V and 1000V DC. The existing PTC sheets with a maximum thickness of 3.5mm cannot meet the creepage distance requirements according to the standards IEC 60664, GB / T 16935.1-2008, and GB / T 18384.1-2015. Using 3.5mm thick ceramic PTC sheets at 800V and 1000V DC can easily cause side short circuits.

[0004] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a ceramic PTC surface structure to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows: A ceramic PTC surface structure includes a ceramic PTC heating element and an adhesive insulating component, wherein the adhesive insulating component has sidewalls around the ceramic PTC heating element.

[0007] Preferably, the adhesive insulating element is an adhesive-structured silicone.

[0008] Preferably, the adhesive insulating material is an insulating liquid curable silicone material or an insulating liquid curable resin material.

[0009] Preferably, the adhesive insulating material is attached to the sides of the ceramic PTC heating element by one or more of the following methods: spraying, brushing, and transfer printing.

[0010] Preferably, the adhesion thickness is 0.1-0.5 mm.

[0011] The beneficial effects of this invention are as follows: It can achieve the creepage distance that the original 3.5mm creepage distance, according to standards IEC 60664, GB / T 16935.1-2008, and GB / T 18384.1-2015, could only meet the 630V DC level of pollution degree I. By adding an adhesive insulating component to the side of the ceramic PTC, the surface contamination level is reduced. Simultaneously, the creepage distance between the two electrode surfaces of the ceramic PTC is increased by the distance to the silicone surface, thereby improving the withstand voltage capability of the ceramic PTC to meet the practical application requirements of 1000V DC voltage. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a ceramic PTC surface structure according to an embodiment of the present utility model; Figure 2 This is an exploded view of a ceramic PTC surface structure according to an embodiment of the present invention; Figure 3 This is a top view of a ceramic PTC surface structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure before optimization according to an embodiment of the present utility model; Figure 5 This is an optimized structural schematic diagram according to an embodiment of the present utility model.

[0014] In the picture: 1. Ceramic PTC heating element; 2. Adhesive insulating component. Detailed Implementation

[0015] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0016] According to an embodiment of the present invention, a ceramic PTC surface structure is provided.

[0017] Example 1: like Figure 1-5As shown, the ceramic PTC surface structure according to an embodiment of the present invention includes a ceramic PTC heating element 1 and an adhesive insulating element 2, wherein the adhesive insulating element 2 is provided with four sidewalls around the ceramic PTC heating element 1.

[0018] Example 2: like Figure 1-5 As shown, the adhesive insulating component 2 is an adhesive-structured silicone.

[0019] Example 3: like Figure 1-5 As shown, the adhesive insulating component 2 is an insulating liquid curable silicone material or an insulating liquid curable resin material.

[0020] The adhesive insulating element 2 is attached to the sides of the ceramic PTC heating element 1 by one or more of the following methods: spraying, brushing, and transfer printing.

[0021] The adhesion thickness is 0.1-0.5 mm.

[0022] In summary, by utilizing the above-described technical solution of this utility model, the original 3.5mm creepage distance, which, according to standards IEC60664, GB / T 16935.1-2008, and GB / T 18384.1-2015, could only meet the 630V DC level of pollution degree I. By adding an adhesive insulating component 2 to the side of the ceramic PTC, the surface contamination level is reduced, and the creepage distance between the two electrode surfaces of the ceramic PTC is increased by the distance to the silicone surface, thereby improving the withstand voltage capability of the ceramic PTC to meet the practical application field of 1000V DC voltage. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ceramic PTC surface structure, characterized in that, The device includes a ceramic PTC heating element (1) and an adhesive insulating component (2). The adhesive insulating component (2) has four sidewalls around the ceramic PTC heating element (1). The adhesive insulating component (2) is an adhesive structural silicone. The adhesive insulating component (2) is an insulating liquid curable silicone material or an insulating liquid curable resin material. The adhesive insulating component (2) is attached to the sides of the ceramic PTC heating element (1) by one or more of the following methods: spraying, brushing and transfer printing.

2. The ceramic PTC surface structure according to claim 1, characterized in that, The adhesion thickness is 0.1-0.5 mm.

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