Category: Power/New Energy

I. Overview The principle of superposition is an important analysis method for linear circuits. A linear circuit is a circuit in which voltage and current are proportional. Its content is: in a linear circuit containing multiple electromotive forces, the current (or voltage) of any branch is the algebraic sum of the current (or voltage) generated […]

First, the definition of resistance When current flows through a certain material, the material current has a certain hindering effect, and this hindering effect is the resistance of the material. It is represented by the symbol R. The unit of resistance is ohm [m], which is represented by the symbol Ω. In addition to ohms, […]

First, the characteristics of pure resistance AC circuit An AC circuit without capacitance and inductance and only resistance is called a purely resistive AC circuit, as shown in Figure (a). The waveforms of the current in the circuit and the voltage across the circuit were observed through experiments and an oscilloscope, as shown in Figure […]

The battery capacity is really difficult to balance However, it should be possible for us to equalize the voltage of each battery when the battery pack is discharged. It is obviously meaningless and unnecessary to let go of the excess power in vain. Why can’t this part of the energy be replenished to the battery […]

Ignition cranking during startup and load dump during shutdown are common causes of voltage transients in automotive power lines. These undervoltage (UV) and overvoltage (OV) transients are large in magnitude and can cause damage to circuits not designed to operate under extreme conditions. Dedicated UV and OV protection devices have been developed to disconnect sensitive […]

In the first quarter of this year, Littelfuse’s silicon carbide MOSFET products were successfully bid for a domestic photovoltaic system project, and the product was successfully applied to the three-phase solar inverter auxiliary power circuit. Littelfuse’s design scheme has been recognized by the market again, and a long-term cooperation opportunity has been obtained. As a […]

Part 1: The Importance of Power to Humanity Electricity! We are both familiar and unfamiliar. Electricity is widely used in our lives, ranging from lamps, televisions, computers, telephones, etc. in our daily life. In modern industry, agriculture and other sectors of the national economy, electricity is the main source of power to support the operation […]

This paper introduces the concepts of direct current and alternating current, the symbols of direct current and alternating current, the rectification method of direct current and alternating current, the current whose magnitude and direction do not change with time, and the rectification and half rectification methods of alternating current. symbols for direct current and alternating […]

01 Research Background Lithium-oxygen batteries (Li-O2) can provide higher energy than traditional lithium-ion batteries through the reaction of metallic lithium with oxygen, which will improve important conditions for the realization of heavy-duty vehicles and aviation electrification. However, considering that in organic electrolytes, oxygen reduction products such as Li2O2 and Li2O do not dissolve to a […]

Research Speed ​​Reading Air self-charging aqueous metal-ion batteries typically suffer from capacity loss after self-charging cycles due to the formation of alkaline salts on the cathode in near-neutral electrolytes. Recently, the team of Niu Zhiqiang of Nankai University developed an air self-charging Pb/PTO battery based on proton chemistry in an acidic electrolyte. The fast kinetics […]