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Temperature fuse with resistor and battery protection circuit

A technology of resistance temperature and fuse, which is applied in the field of resistance temperature fuse, can solve the problem of narrow operating power range and achieve the effect of ensuring miniaturization

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

[0010] 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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  • Temperature fuse with resistor and battery protection circuit
  • Temperature fuse with resistor and battery protection circuit
  • Temperature fuse with resistor and battery protection circuit

Examples

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Embodiment Construction

[0044] 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.

[0045] 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).

[0046] exist figure 1 In (I), 1 is an insulating substrate such as a ceramic plate having good heat resistance and thermal conductivity. a and b are membrane electrodes formed on both sides of one surface of an insulating substrate, and 2 is an intermediate electrode formed by printing and firing a 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 a, b, 2. The fuse element 3 is divided into parts n and m sandwiching the in...

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Abstract

This invention provides a resistor temperature fuse and batter protection circuit board, aiming to realize minimization for main body with resistor temperature fuse and simplification of circuits for secondary battery protection circuit containing resistor temperature. Thus, fuse elements are thoroughly disposed on film electrodes of two sides and middle film electrode on surface of a substrate, on fore end for jointing ribbon leads of on each film electrode, on surface of the substrate is covered with insulation sealing, disposing film resistors by transversely crossing fore and rear electrodes on other surface of the substrate, one film electrode is electrically connected with the middle film electrode, fore end of the ribbon lead is jointed with side part of another film electrode via surface contact, step rising to other side of the substrate is formed on edge end position of ribbon lead close to the substrate, height difference between upper side of the step and other surface of the substrate equals to thickness of the ribbon lead.

Description

technical field [0001] The present invention relates to a thermal fuse with resistance, which can be used, for example, as a thermal fuse with resistance mounted on a circuit body for protecting a secondary battery. Background technique [0002] In the case of using a secondary battery, such as a lithium ion battery, as a power source for a portable electronic device, the secondary battery unit and a protection circuit are housed in the package, and the protection circuit is provided with an overcharge prevention switch and an overdischarge prevention switch, It also has a fuse section that irreversibly cuts off the circuit when these switches fail. [0003] FIG. 4 shows an example of a protection circuit for a secondary battery, 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 two fuse element parts n and m con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H37/76H01M2/34H05K1/02
CPCY02E60/10H01M2200/103H01M2220/30H01M2010/4271H01M50/581H01M50/572
Inventor 富高康彦西野智博
Owner UCHIHASHI ESTEC
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