Abstract: A temperature detector is configured to detect the temperature of a housing while in contact with the housing, and a spring pin is in contact with the temperature detector in a separable manner. Thus, at mounting of the temperature detecting device on an electronic device, it is possible to fix the temperature detector to the housing, and the spring pin to a circuit board of the electronic device. At disassembly of the electronic device, it is easy to separate the spring pin from the temperature detector by removing, from the housing, the spring pin together with the circuit board. At assembly of the electronic device, it is easy for the spring pin to contact the temperature detector by attaching, to the housing, the spring pin together with the circuit board.

Abstract: A temperature detector is configured to detect the temperature of a housing while in contact with the housing, and a spring pin is in contact with the temperature detector in a separable manner. Thus, at mounting of the temperature detecting device on an electronic device, it is possible to fix the temperature detector to the housing, and the spring pin to a circuit board of the electronic device. At disassembly of the electronic device, it is easy to separate the spring pin from the temperature detector by removing, from the housing, the spring pin together with the circuit board. At assembly of the electronic device, it is easy for the spring pin to contact the temperature detector by attaching, to the housing, the spring pin together with the circuit board.

Abstract: A flexible board includes a base layer, a wiring conductor layer that is located on the base layer, and a cover layer that is stacked over the base layer and covers the wiring conductor layer. A portion of the wiring conductor layer defines connecting portions that connect each of split electrodes of a flexible thermistor. The cover layer includes an opening that exposes the connecting portions, and receives the flexible thermistor. The split electrodes of the flexible thermistor are mounted on the connecting portions of the wiring layer. The height of the exposed surface of the flexible thermistor from the opening is substantially equal to the height of the surface of the cover layer.

Abstract: A flexible board includes a base layer, a wiring conductor layer that is located on the base layer, and a cover layer that is stacked over the base layer and covers the wiring conductor layer. A portion of the wiring conductor layer defines connecting portions that connect each of split electrodes of a flexible thermistor. The cover layer includes an opening that exposes the connecting portions, and receives the flexible thermistor. The split electrodes of the flexible thermistor are mounted on the connecting portions of the wiring layer. The height of the exposed surface of the flexible thermistor from the opening is substantially equal to the height of the surface of the cover layer.

Abstract: In a method for sorting PTC elements having different resistance-temperature characteristics, a predetermined voltage that allows a current to sufficiently decay is applied to each of PTC elements A and B, and the PTC elements are sorted on the basis of the difference between the times required for the currents passing through the PTC elements B to reach a predetermined value (e.g., 52 mA).

Abstract: A battery pack includes a first switching element which shuts off a discharging current flowing to a battery cell and a second switching element which shuts off a charging current. A positive temperature coefficient thermistor is inserted between a gate control terminal of a protective control circuit and a gate of at least one of the switching elements, and a resistor is connected between the gate and a source of the switching element. The positive temperature coefficient thermistor is thermally connected to one or more of the first and second switching elements and/or to the battery cell. Thus, an abnormally overheated state of one or more of the switching elements or the battery cell leads to an increase in the resistance of the positive temperature coefficient thermistor causing shut-off of the switching element thereby protecting the battery pack.

Abstract: A battery pack includes a first switching element which shuts off a discharging current flowing to a battery cell and a second switching element which shuts off a charging current. A positive temperature coefficient thermistor is inserted between a gate control terminal of a protective control circuit and a gate of at least one of the switching elements, and a resistor is connected between the gate and a source of the switching element. The positive temperature coefficient thermistor is thermally connected to one or more of the first and second switching elements and/or to the battery cell. Thus, an abnormally overheated state of one or more of the switching elements or the battery cell leads to an increase in the resistance of the positive temperature coefficient thermistor causing shut-off of the switching element thereby protecting the battery pack.

Abstract: A battery pack includes a first switching element which shuts off a discharging current flowing to a battery cell and a second switching element which shuts off a charging current. A positive temperature coefficient thermistor is inserted between a gate control terminal of a protective control circuit and a gate of at least one of the switching elements, and a resistor is connected between the gate and a source of the switching element. The positive temperature coefficient thermistor is thermally connected to one or more of the first and second switching elements and/or to the battery cell. Thus, an abnormally overheated state of one or more of the switching elements or the battery cell leads to an increase in the resistance of the positive temperature coefficient thermistor causing shut-off of the switching element thereby protecting the battery pack.

Abstract: A battery pack includes a first switching element which shuts off a discharging current flowing to a battery cell and a second switching element which shuts off a charging current. A positive temperature coefficient thermistor is inserted between a gate control terminal of a protective control circuit and a gate of at least one of the switching elements, and a resistor is connected between the gate and a source of the switching element. The positive temperature coefficient thermistor is thermally connected to one or more of the first and second switching elements and/or to the battery cell. Thus, an abnormally overheated state of one or more of the switching elements or the battery cell leads to an increase in the resistance of the positive temperature coefficient thermistor causing shut-off of the switching elementthereby protecting the battery pack.

Abstract: In a method for sorting PTC elements having different resistance-temperature characteristics, a predetermined voltage that allows a current to sufficiently decay is applied to each of PTC elements A and B, and the PTC elements are sorted on the basis of the difference between the times required for the currents passing through the PTC elements B to reach a predetermined value (e.g., 52 mA).

Abstract: In order to improve uniformity of temperature distribution, despite heat which is generated in a resistance circuit and flows into a support part thereby causing a high output, a resistance circuit is provided with first, second and third regions having different resistance values so that the third region which is in proximity to the support part has the highest resistance value.

Abstract: A platinum temperature sensor includes a meandering pattern portion and outlet portions continuously connected to respective ends thereof which are defined by a platinum film which is formed on an insulating substrate. External electrodes are formed to cover the outlet portions as well as the ends of the insulating substrate provided with the outlet portions. Each of the external electrodes comprises a first layer containing platinum or nickel which is in contact with the outlet portion and with the insulating substrate, a second layer containing silver and platinum which is formed on the first layer, a third layer containing nickel which is formed on the second layer, and a fourth layer containing tin or solder which is formed on the third layer. The first layer suppresses diffusion of silver contained in the second layer, and the third layer improves heat resistance of the second layer, while the fourth layer improves solderability.

Abstract: A method of manufacturing a platinum temperature sensor includes the step of obtaining a meandering resistive circuit by forming grooves in a platinum film which is provided on an insulating substrate. In order to provide a high resistance value by reducing the line width of the resistive circuit, as well as to miniaturize the platinum temperature sensor, this method comprises steps of forming a resist film on the platinum film provided on the insulating substrate, patterning the resist film by photolithography, and using the patterned resist film as a mask to finely work the platinum film by Ar.sup.+ ion etching for forming the grooves. Due to formation of such grooves, the platinum film defines a meandering pattern portion which provides the resistive circuit.