High-stability PTC thermosensitive assembly capable of improving maintenance current
A technology with high stability and maintaining current, applied in the direction of resistance terminals/electrodes, resistors with positive temperature coefficients, etc., to achieve the effect of diversified processing methods, large maintaining current, and low initial resistance
Inactive Publication Date: 2017-02-22
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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Problems solved by technology
At the same time, with the high-end built-in processing of mobile phones, the heat generated by the built-in hardware is much higher than that of feature phones. Therefore, when the mobile phone experiences complex temperature shocks, PTC will generate resistance and cause malfunction protection.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0048] The steps of preparing the conductive composite material and the PTC thermosensitive element are the same as those of the comparative example, but the conductive filler is replaced by a titanium carbide solid solution with a particle size of less than 10 μm, a volume resistivity of 42 μΩ.cm, and a thermal conductivity of 18W / (m.K ).
Embodiment 2
[0050] The steps of preparing conductive composite materials and PTC thermal elements are the same as in Example 2, but on the basis of Example 1, the pure nickel electrode foil is replaced with pure copper electrode foil, the resistivity is 1.7μΩ.cm, and the thermal conductivity is 380 W / (m.K);
Embodiment 3
[0052] The steps of preparing the conductive composite material and the PTC thermal element are the same as in Example 3, but on the basis of Example 2, the PTC chip size is punched into 2.4*3.6mm single element pieces;
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The invention relates to a high-stability PTC thermosensitive assembly capable of improving maintenance current. An assembly structure with a positive temperature effect comprises a built-in core material, an insulating material frame coating the built-in core material, an insulating semi-cured resin material coating the insulating material frame and two surfaces of a PTC electrode foil, and an electrode foil covering the outmost surface end of the semi-cured resin material, wherein the built-in core material is formed by stacking multiple layers of PTC core materials in parallel; each layer of PTC core material comprises an upper electrode foil, a lower electrode foil and a material layer which is folded and clamped between the upper electrode foil and the lower electrode foil and has a resistance positive temperature coefficient effect; the electrode foil on the outmost surface end is connected with an electrode foil on the surface end of the built-in core material through a blind hole; and a conductive metal pin is connected to the electrode foil on the outmost surface end. According to the high-stability PTC thermosensitive assembly, the resistance of the PTC thermosensitive element is reduced by stacking the PTC core materials in parallel to improve the maintenance current; and air and moisture are isolated by using the insulating material frame and expansion of the PTC core materials is limited, so that the stability is improved.
Description
technical field [0001] The invention relates to a high-stability PTC thermal element capable of increasing the holding current, which increases the effective area of the positive temperature coefficient effect core material through stacking and parallel connection, thereby reducing the resistance of the PTC component and increasing the holding current; at the same time, the insulating material covers the positive temperature The coefficient effect core material, on the one hand, uses insulating materials to isolate air and moisture, and on the other hand, limits the expansion of the material layer of the positive temperature coefficient effect to improve its stability. Therefore, it can maintain low resistance after application in various extreme environments, and increase the service life of the PTC. Background technique [0002] Conductive composite materials with a positive temperature coefficient of resistance can maintain an extremely low resistance value at normal te...
Claims
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IPC IPC(8): H01C1/14H01C7/02
Inventor 方勇刘玉堂杨铨铨高道华吴国臣
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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