14results about "Capacitor collector combinations" patented technology

The present disclosure provides a nonaqueous lithium power storage element in which the positive electrode active substance layer contains lithium iron phosphate and a carbon material containing activated carbon as the positive electrode active substance. When the content of carbon material in the positive electrode active substance layer is X1 (mass%) and the lithium iron phosphate content is X2 (mass%), the lithium iron phosphate mass ratio (X2 / (X1+X2)) is 0.40 to 0.85. The total pore volume of the positive electrode active substance layer is 0.29 cc / g to 0.70 cc / g, the void diameter D25 of the positive electrode active substance layer is 0.34 µm to 0.64 µm, the void diameter D75 of the positive electrode active substance layer is 0.10 µm to 0.20 µm, and the difference between the void diameter D25 and the void diameter D75 (D25-D75) is 0.20 µm to 0.45 µm.

According to an embodiment of the present disclosure, an aerosol generating device includes a housing including a battery receiving space; a heater which is arranged inside the housing and heats an aerosol generating material; and a power source which supplies power to the heater, wherein the power source includes a first battery which is detachably coupled to the battery receiving space and supplies power to the heater; and a second battery which is arranged inside the housing, is connected in parallel with the first battery when the first battery is coupled to the battery receiving space, and supplies the power to the heater .

One embodiment of the present invention, in order to achieve the described technical objective, may provide an energy storage system manufacturing method comprising the steps of: receiving, in a pouch, a lithium electrode assembly comprising a lithium electrode terminal protruding to a first side of the pouch, a negative electrode assembly comprising a negative electrode terminal, a positive electrode assembly comprising a positive electrode terminal, and an electrolyte; doping the negative electrode assembly with lithium by electrically connecting the lithium electrode terminal and the negative electrode terminal; extracting the lithium electrode assembly from the pouch by cutting the pouch along a cut line which is formed so as to be spaced apart from the first side of the pouch at a predetermined interval; and sealing the cut surface of the pouch cut along the cut line.

Disclosed is a balancer for electric double-layer capacitors that maximizes charging energy efficiency by allowing deviation within a permissible range in which charging voltages of a first electric double-layer capacitor and a second electric double-layer capacitor do not cause problems, while controlling currents flowing through the two electric double-layer capacitors to be equal.The balancer includes a first resistor, a second resistor, and a third resistor sequentially connected in series between a power line and a 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 electric double-layer capacitor; and a second transistor connected in series with the first transistor, having a base terminal electrically connected between the second resistor and the third resistor and connected in parallel with the second electric double-layer capacitor.

Provided is a secondary battery with high capacity and less degradation. Also provided is a novel power storage device. This secondary battery has a positive electrode and a negative electrode. The negative electrode has a first active material, a second active material, and a graphene compound. A region covered with the second active material is provided to at least part of the surface of the first active material. A region covered with the graphene compound is provided to at least part of the surface of the first active material and the surface of the second active material. The first active material includes graphite. The second active material includes silicon. With respect to the capacity of the negative electrode, the capacity of the positive electrode is not less than 50% but less than 100%.

Disclosed is a balancer (100) for electric double-layer capacitors (C1, C2) that improves charging energy efficiency by allowing deviation within a permissible range in which charging voltages of a first electric double-layer capacitor (C1) and a second electric double-layer capacitor (C2) do not cause problems, while controlling currents (IL1, IL2) flowing through the two electric double-layer capacitors to be equal. The balancer (100) includes a first resistor (R1), a second resistor (R2), and a third resistor (R3) sequentially connected in series between a power line (VCC) and a common line (COMMON); a first transistor (Q1) having a base terminal (B) electrically connected between the first resistor (R1) and the second resistor (R2) and connected across the first electric double-layer capacitor (C1); and a second transistor (Q2) connected in series with the first transistor (Q1), having a base terminal (B) electrically connected between the second resistor (R2) and the third resistor (R3) and connected across the second electric double-layer capacitor (C2).

A method for monitoring one or more characteristics of an ultracapacitor is provided. The method includes obtaining a plurality of voltage measurements. Each of the voltage measurements can be obtained sequentially at one of a plurality of intervals. Furthermore, each of the voltage measurements can be indicative of a voltage across the ultracapacitor. The method can include determining an actual voltage step of the ultracapacitor based on two consecutive voltage measurements of the plurality of voltage measurements. The method can further include determining whether the actual voltage step exceeds a threshold voltage step of the ultracapacitor. Furthermore, in response to determining the actual voltage step exceeds the threshold voltage, the method can include providing a notification associated with performing a maintenance action on the ultracapacitor.

This invention provides an electric double-layer capacitor balancer that maximizes charging energy efficiency by controlling the current flowing through two electric double-layer capacitors to be the same. [Solution] The present invention relates to an electric double layer capacitor balancer for balancing the current flowing through a first electric double layer capacitor and a second electric double layer capacitor, which are sequentially connected in series between a power line and a common line, such that the current flowing through them is the same. The present invention discloses an electric double layer capacitor balancer comprising a first resistor, a second resistor and a third resistor sequentially connected in series between a power line and a common line, a first transistor whose base terminal is electrically connected between the first resistor and the second resistor and connected in parallel with the first electric double layer capacitor, and a second transistor connected in series with the first transistor, whose base terminal is electrically connected between the second resistor and the third resistor and connected in parallel with the second electric double layer capacitor.