公开(公告)号：WO2015148885A1

公开(公告)日：2015-10-01

申请号：PCT/US2015/022918

申请日：2015-03-27

Applicant: TYCO ELECTRONICS CORPORATION

Inventor： CHEN, Jianhua ,  GUO, Weiqing ,  NGO, Minh, V. ,  HILTY, Robert, D. ,  TANAKA, Arata

IPC: H01H37/54 ,  H01H9/04

CPC classification number: H01H37/52 ,  H01H9/04 ,  H01H37/54 ,  H01H37/5427 ,  H01H2037/528

Abstract: A thermal cut-off device (100) includes a plastic base (102), two electrodes (104, 114), a temperature sensing element (108), and a plastic cover (122) that fits over the base. The temperature sensing element is curved downward, and may be a bimetal or a trimetal. When the device is subject to an over-temperature condition, the orientation of the curve flips such that the temperature sensing element is then curved upward. When the temperature sensing element is curved upward, it lifts an arm of one of the electrodes, which severs the electrical connection between the electrodes. In this manner the device shuts off during an over-temperature condition in order to protect the circuit in which the device is installed. To prevent corrosion of the temperature sensing element, a first moisture insulation layer is applied to the outer surface of the thermal cut-off device. The moisture insulation layer may be an epoxy adhesive or a UV/visible light-cured adhesive or light/heat cured adhesive. In some embodiments, a second moisture insulation layer (138) is formed on the surface of the temperature sensing element.

Abstract translation: 热切断装置（100）包括塑料基座（102），两个电极（104,114），温度感测元件（108）和装配在基座上的塑料盖（122）。 温度感测元件向下弯曲，并且可以是双金属或三边形。 当器件处于过温状态时，曲线的方向翻转，使温度感测元件向上弯曲。 当温度感测元件向上弯曲时，它提升电极中的一个的臂，其切断电极之间的电连接。 以这种方式，设备在过温状态下关闭，以便保护设备安装在其中的电路。 为了防止温度感测元件的腐蚀，将第一防潮层施加到热断开装置的外表面。 防潮层可以是环氧粘合剂或UV /可见光固化粘合剂或光/热固化粘合剂。 在一些实施例中，在温度感测元件的表面上形成第二湿气绝缘层（138）。