6 results about "Double layer capacitor" patented technology

A power supply device of the present invention includes a storage circuit including electrical double layer capacitor between first node connected to a power supply, which is an in-vehicle battery, and second node grounded; a charge circuit connected to the first node and configured to charge the storage circuit; and a power supply controller configured to measure voltage at the first node and control the charge circuit. The power supply controller performs procedure of causing the charge circuit to charge the storage circuit and computing first capacitance value and first equivalent series resistance value of the electrical double layer capacitor based on voltage measured at the first node, upon determining the voltage at the first node is lower than a threshold voltage value, that is, determining a stop period of a vehicle is longer than a threshold period.

A lithium ion capacitor includes binder free positive and negative electrode active layers. The capacitor exhibits high energy density, power density and cycle life and provides a good compromise in performance between an electric double layer capacitor and a lithium ion battery.

The present disclosure provides an electric double layer capacitor with an electrolyte layer which suppresses leakage current and has high ion conductivity. The electric double layer capacitor includes a pair of electrode bodies and an electrolyte layer. The electrode bodies have polarizable electrodes. The electrolyte layer includes ionic liquid plastic crystals.

A lithium ion capacitor includes binder free positive and negative electrode active layers. The capacitor exhibits high energy density, power density and cycle life and provides a good compromise in performance between an electric double layer capacitor and a lithium ion battery.

The present disclosure relates to β-H-free tetraalkylammonium salts of trifluoroborates substituted with electron-withdrawing groups, and to the use thereof in an electrolyte composition. The present disclosure relates in particular to their use in an electrolyte composition in electrochemical supercapacitors and ultracapacitors, for example in double-layer capacitors in electric motors.

The present invention relates to a double layer capacitor balancer for balancing current flowing through a first double layer capacitor and a second double layer capacitor connected in series with each other in sequence between a power line and a common line, which can maximize charging energy efficiency by controlling the same current flowing through both double layer capacitors while allowing deviation within a range in which charging voltages of both double layer capacitors are not problematic. It includes a first resistor, a second resistor, and a third resistor connected in series with each other in sequence between the power line and the common line; a first transistor having a base terminal electrically connected between the first resistor and the second resistor and connected in parallel with the first double layer capacitor; and a second transistor connected in series with the first transistor and having a base terminal electrically connected between the second resistor and the third resistor and connected in parallel with the second double layer capacitor.