Some embodiments include a fuse element assembly having a first portion configured to rupture as materials of the first portion flow to a second portion through electromigration. The assembly has a second portion configured to accumulate the materials that have flowed from the first portion. The assembly also has a control element configured to divide the flow of materials into at least two paths along the second portion. The first portion may be a fuse-link and the second portion may be a cathode coupled to the fuse-link through a narrow neck region. The control element may be, for example, a slit, a hole, a conductive contact, etc.

An integrated circuit structure includes a first fuse line formed in a first metal layer; a second fuse line formed in the first metal layer; a first pair of fuse wings formed in the first metal layer on opposite sides of a first end of the first fuse line; a second pair of fuse wings formed in the first metal layer on opposites sides of a first end of the second fuse line; a third pair of fuse wings formed in the first metal layer on opposite sides of a second end of the first fuse line; and a fourth pair of fuse wings formed in the first metal layer on opposites sides of a second end of the second fuse line. The first and second pairs of fuse wings share a first common fuse wing and the third and fourth pairs of wings share a second common fuse wing.

An integrated circuit structure includes a first fuse line formed in a first metal layer; a second fuse line formed in the first metal layer; a first pair of fuse wings formed in the first metal layer on opposite sides of a first end of the first fuse line; a second pair of fuse wings formed in the first metal layer on opposites sides of a first end of the second fuse line; a third pair of fuse wings formed in the first metal layer on opposite sides of a second end of the first fuse line; and a fourth pair of fuse wings formed in the first metal layer on opposites sides of a second end of the second fuse line. The first and second pairs of fuse wings share a first common fuse wing and the third and fourth pairs of wings share a second common fuse wing.

A protective element includes: an insulating substrate; first and second electrodes provided on the insulating substrate; a heating element formed on the insulating substrate; a heating-element extraction electrode electrically connected to the heating element; a fusible conductor mounted from the first electrode to the second electrode with the heating-element extraction electrode interposed between the first and second electrodes; and an insulating protective layer which covers the heating element and includes a thermally conductive filler.

A fuse unit includes: a fuse element with an insertion hole into which a stud bolt inserted, the stud bolt protrudingly provided on a battery terminal fixed to a battery post protrudingly provided on an upper surface of a battery; and a resin body integrally formed with the fuse element by insert molding, and having an abutment portion abutting on a side surface of the battery. For a plurality of batteries each having the battery post at a different arrangement position, the insertion hole of the fuse element is formed in a shape allowing insertion of the stud bolt thereinto in a state where the side surface of the battery and the abutment portion of the resin body abut on each other.

A fuse unit includes: a fuse element with an insertion hole into which a stud bolt inserted, the stud bolt protrudingly provided on a battery terminal fixed to a battery post protrudingly provided on an upper surface of a battery; and a resin body integrally formed with the fuse element by insert molding, and having an abutment portion abutting on a side surface of the battery. For a plurality of batteries each having the battery post at a different arrangement position, the insertion hole of the fuse element is formed in a shape allowing insertion of the stud bolt thereinto in a state where the side surface of the battery and the abutment portion of the resin body abut on each other.

One or more techniques and/or systems are provided for detecting reverse polarity of a photovoltaic system. A fuse holder may comprise a fuse holder body configured to receive a fuse used to protect against excessive current from a photovoltaic string of the photovoltaic system, such as current from a short circuit due to the photovoltaic string being installed backwards and having a reverse polarity. Because installation of the fuse while the photovoltaic string has reverse polarity may result in substantial damage and harm, a reverse polarity detection component may be configured to identify the reverse polarity and provide a warning of the reverse polarity before the fuse is installed (e.g., an audible alert, a blinking light, a locking of the fuse holder to prohibit installation of the fuse, etc.).

One or more techniques and/or systems are provided for detecting reverse polarity of a photovoltaic system. A fuse holder may comprise a fuse holder body configured to receive a fuse used to protect against excessive current from a photovoltaic string of the photovoltaic system, such as current from a short circuit due to the photovoltaic string being installed backwards and having a reverse polarity. Because installation of the fuse while the photovoltaic string has reverse polarity may result in substantial damage and harm, a reverse polarity detection component may be configured to identify the reverse polarity and provide a warning of the reverse polarity before the fuse is installed (e.g., an audible alert, a blinking light, a locking of the fuse holder to prohibit installation of the fuse, etc.).

Some embodiments include a fuse element assembly having a first portion configured to rupture as materials of the first portion flow to a second portion through electromigration. The assembly has a second portion configured to accumulate the materials that have flowed from the first portion. The assembly also has a control element configured to divide the flow of materials into at least two paths along the second portion. The first portion may be a fuse-link and the second portion may be a cathode coupled to the fuse-link through a narrow neck region. The control element may be, for example, a slit, a hole, a conductive contact, etc.

Some embodiments include a fuse element assembly having a first portion configured to rupture as materials of the first portion flow to a second portion through electromigration. The assembly has a second portion configured to accumulate the materials that have flowed from the first portion. The assembly also has a control element configured to divide the flow of materials into at least two paths along the second portion. The first portion may be a fuse-link and the second portion may be a cathode coupled to the fuse-link through a narrow neck region. The control element may be, for example, a slit, a hole, a conductive contact, etc.