PTC device and secondary battery having same

A technology for secondary batteries and PTC components, which is applied in secondary battery repair/maintenance, resistors with positive temperature coefficients, batteries, etc., and can solve problems such as increased volume and no PTC components.

Inactive Publication Date: 2013-07-03
TYCO ELECTRONICS JAPAN GK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this secondary battery, for example, in the case of an AA-type or AAA-type battery, there are restrictions on increasing the volume it occupies, so no PTC component is provided.

Method used

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  • PTC device and secondary battery having same
  • PTC device and secondary battery having same
  • PTC device and secondary battery having same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] The PTC parts (assuming that the end parts of the lead wires are exposed) are thermocompression-bonded in a state sandwiched by films, thereby manufacturing Figure 4 The PTC device A of the present invention is shown. It should be noted that, during thermocompression bonding, in order to avoid force acting on the PTC component, only the film portion extending outward from the periphery of the PTC component is pressed (the lead wire portion is pressed).

[0066] The film used was a laminated film (thickness: 100 μm) of a polypropylene resin layer and a polyethylene resin layer. This film was used with the polypropylene resin layer on the outside.

[0067] It should be noted that other conditions are as follows:

[0068] PTC parts used (trade name: PolySwitch, manufactured by Tyco Electronics Japan Co., Ltd.)

[0069] Lead wire: nickel (trade name: NB201, manufactured by Neomax Corporation, thickness: 150 μm)

[0070] Conductive material: lead-free solder (alloy sold...

example 2

[0073] Using the same PTC parts as in Example 1, insert molding of polypropylene resin produced the image 3 PTC device B of the present invention is shown. The polypropylene resin used was a product name: Prime polypro, manufactured by Prime Polymer Co., Ltd. The conditions of the PTC device B other than the protective member are the same as those of the PTC device A.

[0074] The PTC devices A and B of the present invention thus obtained were immersed in an aqueous KOH solution (1N) at 60° C. for 3 months, and an alkali immersion test was carried out to observe the state of the interface between the protective member and the lead wire to evaluate the effect of alkali generation. influences. Furthermore, a holding current test (I-V test) was performed on the immersed PTC device. In addition, for comparison, the same measurement was performed on other PTC components themselves having the same specifications as the PTC components used in the manufacture of the PTC device. T...

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Abstract

In order to increase the compactness of electric devices such as a PTC device, a battery pack comprising a PTC device and a secondary battery, and a dry cell secondary battery, the disclosed PTC device comprises: (1) a PTC element that comprises (A) a layer polymer PTC element comprising (a1) a conductive filler and (a2) a polymer material, and (B) a metal electrode disposed at both surfaces of the polymer PTC element; and (2) a lead that is connected to the metal electrode by a conductive material and of which at least a portion is positioned on the metal electrode of the PTC element. The exposed portion of the abovementioned conductive material is covered by a protective member comprising a polypropylene resin, a nylon resin, or an epoxy resin.

Description

technical field [0001] The present invention relates to a PTC device and an electric device (such as a secondary battery) provided with the PTC device. Background technique [0002] Polymer PTC components having layered polymer PTC elements including conductive fillers and polymer materials and metal electrodes disposed on each of the polymer PTC elements are widely used in various electrical devices. side surface. For example, in order to prevent problems such as overcharging when charging a secondary battery of a mobile phone, such a PTC component is used as a circuit protection device in a circuit for charging a secondary battery. The PTC component is arranged inside the protective circuit via the lead wire, and the PTC device including the PTC member and the lead wire, and the protective circuit are arranged outside the positive terminal, and they are integrated to form an electrical device, which is used as a so-called "battery pack". Since the electric device has a b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02H01M2/34H01M50/574
CPCH01C1/1406H01C7/027H01M2200/106H01C1/028H01C7/02Y02E60/10H01M50/581H01M50/574H01M50/572H01M10/425
Inventor 田中新山冈俊和宫城治寿
Owner TYCO ELECTRONICS JAPAN GK
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