Abstract: The over-current protection device of the present invention uses the unbalanced properties of the thermal expansion coefficients between the outer and inner sides for an upper metallic conductive sheet and a lower metallic conductive sheet to generate a torque to deform outwardly. The torque is used to pull a current-sensing element and present with at least a cracking face, so as to introduce an electrically open effect similar to a fuse. Thus, the present invention can achieve the object for preventing the danger of circuit system by the short circuit during the burning of over-current protection device.

Abstract: An over-current protection apparatus comprises a plurality of over-current protection devices and a bonding sheet. Each over-current protection device comprises at least one current-sensitive element, two outer electrode layers and at least one insulating layer disposed on a surface of the current-sensitive element. The bonding sheet penetrates and connects the plurality of over-current protection devices, and is disposed on a surface of the at least one current-sensitive element for insulation.

Abstract: A temperature sensor comprises at least one temperature sensing device and a sensing circuit. The temperature sensing device comprises a first electrode layer, a second electrode layer and a current-sensitive layer, wherein at least one of the first and second electrode layers comprises two electrically separated electrode plates, and the current-sensitive layer is laminated between the first and second electrode layers. The current-sensitive layer is made of PTC or NTC material, and the sidewalls are not plated with conductive films. The sensing circuit is electrically coupled to the temperature sensing device to read temperatures.

Abstract: The over-current protection device of the present invention uses the unbalanced properties of the thermal expansion coefficients between the outer and inner sides for an upper metallic conductive sheet and a lower metallic conductive sheet to generate a torque to deform outwardly. The torque is used to pull a current-sensing element and present with at least a cracking face, so as to introduce an electrically open effect similar to a fuse. Thus, the present invention can achieve the object for preventing the danger of circuit system by the short circuit during the burning of over-current protection device.

Abstract: An over-current protection device includes a first electrode layer, a second electrode layer and a polymeric current-sensitive layer sandwiched between the first and second electrode layers. The polymeric current-sensitive layer comprises 2-4% silicate flakes by weight, which is a nano-material of a thickness approximately 1 nanometer (nm) and a diameter between 100-500 nm.

Abstract: The over-current protection device of the present invention uses the unbalanced properties of the thermal expansion coefficients between the outer and inner sides for an upper metallic conductive sheet and a lower metallic conductive sheet to generate a torque to deform outwardly. The torque is used to pull a current-sensing element and present with at least a cracking face, so as to introduce an electrically open effect similar to a fuse. Thus, the present invention can achieve the object for preventing the danger of circuit system by the short circuit during the burning of over-current protection device.

Abstract: The present invention discloses an over-current protection apparatus for high voltage, which connects the ceramic current-sensing element and polymer current-sensing element in series to form a novel over-current protection apparatus. By the characteristic of the polymer current-sensing element having higher switching off speed, the invention first responds to the over-current by raising its temperature, and then the heat is thermally conducted through the adhesive layer to the ceramic current-sensing element, resulting in a voltage drop produced by the over-current partially or predominantly received by the ceramic current-sensing element. Thus, the over-current protection device of the invention not only can endure high voltage (>600V), but also will not exhibit a negative temperature coefficient phenomenon.

Abstract: An over-current protection apparatus with high voltage endurance comprises a first electrode layer, a second electrode layer and a ceramic current-sensitive layer, where both the first and second electrode layers are continuous and uniform to enhance electrical and thermal conductivities thereof. The ceramic current-sensitive layer is sandwiched between the first and second electrode layers, and is essentially composed of basic matrix, dopants, conductors and sintering material. The resistance of the over-current protection apparatus with high voltage endurance is less than 10 ohms before being tripped, and the resistance-jumping ratio is less than 1.3.

Abstract: An over-current protection device comprises a positive temperature coefficient material layer, an upper electrode foil, a lower electrode foil, a first metal terminal layer, a second metal terminal layer and at least one insulating layer. The upper electrode foil is disposed on the upper surface of the positive temperature coefficient material layer, and the lower electrode foil is disposed on the lower surface of the positive temperature coefficient material layer. The first metal terminal layer electrically connects the upper electrode foil with at least one non-full-circular conductive through hole and at least one full-circular conductive through hole, and the second metal terminal layer electrically connects the lower electrode foil with at least one non-full-circular conductive through hole and at least one full-circular conductive through hole. The insulating layer isolates the upper electrode foil from the second metal terminal layer and the lower electrode foil from the first metal terminal layer.

Abstract: The present invention discloses a surface mountable device comprising a current-sensitive element and two electrodes. The current-sensitive element is composed of a PTC conductive composite, comprising at least one polymer and a conductive filler. The feature of the present invention is that the current-sensitive element is a three-dimensional bent structure so that the shape, length and height of the device can be varied according to the space of the circuit board and the resistance of the surface mountable device. Therefore, the mountable surface of the circuit board can be used more efficiently. Moreover, the area of the current-sensitive element of the present invention is larger than that of the conventional surface mountable device. Consequently, the normal resistance of the surface mountable device of the present invention is smaller than that of the conventional surface mountable device and the voltage endurance of the surface mountable device of the present invention is increased.

Abstract: The present invention discloses an over-current protection apparatus, comprising a current-sensitive element, a first electrode and a second electrode. The over-current protection apparatus of the present invention is a three-dimensional multi-layer structure, and can be formed by heating, pressing, etching, cutting and multi-stage deformation to prevent it from breakage during the bending process. Therefore, the over-current protection apparatus with at least one bend is formed.

Abstract: An over-current protection device and manufacturing method thereof are revealed. The method for manufacturing an over-current protection device comprises the steps of: (1) providing at least two polymer current-sensing elements, the at least two polymer current-sensing elements comprise flame retardant, and the switching temperatures of adjacent polymer current-sensing elements differ from each other by at least 5° C.; (2) irradiating the at least two polymer current-sensing elements; (3) annealing the at least two polymer current-sensing elements; and (4) combining a first electrode foil and a second electrode foil with the at least two polymer current-sensing elements as a laminate. The at least two polymer current-sensing elements can be irradiated of less than 50 Mrads by Cobalt 60, and be annealed 6-20 hours with a temperature between 100-120° C. Moreover, the flame retardant may be composed of magnesium hydroxide or talc.

Abstract: An over-current protection device comprises a positive temperature coefficient material layer, an upper electrode foil, a lower electrode foil, a first metal terminal layer, a second metal terminal layer and at least one insulating layer. The upper electrode foil is disposed on the upper surface of the positive temperature coefficient material layer, and the lower electrode foil is disposed on the lower surface of the positive temperature coefficient material layer. The first metal terminal layer electrically connects the upper electrode foil with at least one non-full-circular conductive through hole and at least one full-circular conductive through hole, and the second metal terminal layer electrically connects the lower electrode foil with at least one non-full-circular conductive through hole and at least one full-circular conductive through hole. The insulating layer isolates the upper electrode foil from the second metal terminal layer and the lower electrode foil from the first metal terminal layer.

Abstract: The over-current protection device of the present invention uses the unbalanced properties of the thermal expansion coefficients between the outer and inner sides for an upper metallic conductive sheet and a lower metallic conductive sheet to generate a torque to deform outwardly. The torque is used to pull a current-sensing element and present with at least a cracking face, so as to introduce an electrically open effect similar to a fuse. Thus, the present invention can achieve the object for preventing the danger of circuit system by the short circuit during the burning of over-current protection device.

Abstract: The present invention relates to an over-current protecting apparatus, which comprises at least one PTC over-current protecting component and a body. The PTC over-current protecting component has a PTC material, electrodes covering the PTC material, and metal terminations electrically connected to the electrodes. The body has an insulating layer and a first conductive and second conductive regions covering the insulating layer. An end of the first conductive region and second conductive region are electrically connected to the metal terminations, and another ends of the first conductive and second conductive regions are mounted to a PCB. The metal material occupies over 20% area of the sidewall of the first conductive and second conductive regions for increasing solderability. Besides, the top of the PTC over-current protecting component can be adhered to another body to form a symmetrical bodies.

Abstract: The present invention discloses a conductive composition, comprising: (a) at least one polymer; (b) at least one conductive filler, dispersed in the polymer; and (c) a coupling agent, applied to improved the adhesion between the polymer and the conductive filler and having a structure as follows: 1

Abstract: The invention discloses a multi-layer structure of the battery protection device, which uses a plurality of over-current protection modules connected in parallel to reduce the normal resistance value. The polypropylene, glass fiber or other harder materials are appended among the plurality of over-current protection modules. Therefore, even if the over-current protection is burned out due to improper use, the short circuit of the metal conductive sheet connecting to the positive and negative poles of the battery can be avoided.

Abstract: The present invention discloses an over-current protection device and the apparatus thereof. The over-current protection device includes a first electrode foil, a second electrode foil and a plurality of polymer current-sensing elements, wherein the plurality of polymer current-sensing elements are formed by stacking and electrical connection in series. The first and second electrode foils are disposed on the corresponding surface of the plurality of polymer current-sensing elements, and the difference in the transition temperature between adjacent polymer current-sensing elements is at least 5° C.

Abstract: The present invention discloses an over-current protection apparatus for high voltage, which connects the ceramic current-sensing element and polymer current-sensing element in series to form a novel over-current protection apparatus. By the characteristic of the polymer current-sensing element having higher switching off speed, the invention first responds to the over-current by raising its temperature, and then the heat is thermally conducted through the adhesive layer to the ceramic current-sensing element, resulting in a voltage drop produced by the over-current partially or predominantly received by the ceramic current-sensing element. Thus, the over-current protection device of the invention not only can endure high voltage (>600V), but also will not exhibit a negative temperature coefficient phenomenon.

Abstract: The present invention discloses an over-current protection device comprising at least one resistance component, outer conductive members and at least one insulation layer. The resistance component includes a current sensing element, a first conductive member and a second conductive member. The first conductive member is located on the surface of the current sensing element. The second conductive member is located on the other surface of the current sensing element. The resistance components that are adjacent use conductive buried holes to electrically connect their first conductive members and their second conductive member. The outer conductive member includes a first conductive end and a second conductive end.