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Substrate type temperature fuse with resistor and secondary battery protection circuit

A thermal fuse and secondary battery technology, applied in secondary batteries, batteries, circuits, etc., can solve problems such as narrow operating power range, achieve the effect of expanding operating power range and avoiding bursting and breaking

Inactive Publication Date: 2009-02-25
UCHIHASHI ESTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in conventional thermal fuses with resistance, the lower limit of the operating power that can be operated is relatively high, and the upper limit of the operating power that can be blown by the fuse element is relatively low, and the overall operating power range is narrow.

Method used

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  • Substrate type temperature fuse with resistor and secondary battery protection circuit
  • Substrate type temperature fuse with resistor and secondary battery protection circuit
  • Substrate type temperature fuse with resistor and secondary battery protection circuit

Examples

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Embodiment Construction

[0029] Below, while referring to the attached Figure 1 Next, an embodiment of the thermal fuse with resistance according to the present invention will be described.

[0030] figure 1 Indicates an embodiment related to technical scheme 1, figure 1 (I) is a plan view omitting an insulating sealant, figure 1 (II) is the rear view, figure 1 (III) Yes figure 1 Section III-III in (I).

[0031] exist figure 1In (I), 1 is an insulating substrate such as a ceramic plate having good heat resistance and thermal conductivity. a and b are film electrodes formed on both sides of one surface 101 of the insulating substrate 1, and 2 is an intermediate electrode formed by printing and sintering conductive paste such as silver paste. 3 is a fuse element, arranged across the membrane electrodes a, b on both sides and the middle membrane electrode 2, and welded at the intersection with the membrane electrodes. The fuse element 3 is divided into parts n and m sandwiching the interme...

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PUM

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Abstract

This invention provides a temperature fuse with resistor substrate and a secondary protection circuit, film electrodes on two sides and a middle film electrode are disposed on surface of the substrate, aforementioned electrodes are widely disposed, and the fuse element, fuse element part (m) between film electrode (a) and the middle film electrode, fuse element part (m) between film electrode (b) and the middle film electrode are also disposed thereon, film resistors leading the fuse elements to blow out via conduction heat are disposed on other surface of the substrate, so that each fuse element can blow out in optimization reliably and partly relative to another fuse element. Thus, distance between fuse element (m) and the film resistor (r) is different from distance of film resistor (r) of the fuse element part (m).

Description

technical field [0001] The present invention relates to a thermal fuse with a resistance substrate, which can be used as a thermal fuse with resistance mounted on a circuit board for secondary battery protection. Background technique [0002] When a secondary battery such as a lithium ion battery is used as a power source for portable electronic equipment, the secondary battery unit and a protection circuit are housed in a package, and the protection circuit is provided with an overcharge prevention switch and an overdischarge prevention switch. It also has a fuse section that cuts off the circuit irreversibly when these switches fail. [0003] Figure 5 An example of a protection circuit for a secondary battery is shown, and a thermal fuse Ao with resistance is connected between the FET (N) for an overcharge prevention switch and the FET (M) for an overdischarge prevention switch. [0004] In this thermal fuse with resistance, the fuse element parts n and m connected in se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H37/76H01M2/34
CPCY02E60/10H01M2220/30H01M2010/4271H01M2200/103H01M50/581H01M50/572
Inventor 富高康彦西野智博
Owner UCHIHASHI ESTEC
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