Battery Charge Level Research Articles

2A1-B24 教育教材としてのライントレースロボットにおける駆動電源安定化

This paper investigates driving power supply regulation for the line tracing robot for educational use. For educational purpose, DC motors for toys are often used for the driving part of the robot because they are reasonable cost and controlling method is easier than other actuators. But, although using same method, the robot's motion changes depending on the battery charge level. This effect makes students confuse in implementing the control method. So, to remove students' uneasiness, the robot's motion should not be affected with battery status. Therefore the robot needs regulated power supply for their driving circuit.

Application of pulse charging techniques to submarine lead-acid batteries

The development of pulse charging equipment for the unique application to submarine lead-acid batteries is described. A prototype pulse charger has been developed and applied to individual twin-cell submarine batteries, plus a 20 twin-cell pulse charger has been commissioned at the battery manufacturing facility. The paper provides a description of the pulse charging equipment and preliminary test results and analyses using the prototype twin-cell pulse charger, based on application of a range of positive and negative pulse parameters. The tests so far indicate potential benefits may arise from this form of charging, including enhancement of battery charge levels, reduced gas charging (Stage 3) times and reduced gas evolution rates.

An investigation of battery voltage equalisation topologies for an electric vehicle

The vehicle’s battery system consists of a series connection of 2612volt lead-acid batteries. This paper details the design and construction of a battery voltage equaliser which aims to balance the charge level of each individual battery within an hour. These batteries are divided into four banks of either six or eight batteries. Four 144Wconverters are required to transfer energy between the banks and the ends of the bus. 25 24W converters transfer energy between adjacent batteries. Due to the numbers of converters involved, the size, weight, cost, manufacturability, and efficiency are the key points of the design.

Technical Note: Loss-of-load probability of stand-alone solar photovoltaic system

In this technical note, a general method has been given to determine the loss-of-load probability (LOLP) of a stand-alone photovoltaic system as a function of normalised PV array output and energy availability at battery. The energy availability at the battery has been determined by using the solar radiation utilisability concept. To determine the LOLP, the PV array output is required, which is a function of climatic conditions and also the energy availability at the battery, to find the accumulative time in which the battery charge level is less than the permissible one. The stand-alone PV system is more reliable with the optimum PV array and battery capacity.

Pulsewidth modulated visual indicator for battery status

A battery status indication circuit and a method of indicating battery status. The battery status indication circuit comprises: (1) an indicator having an inactive state and an active state and (2) an indicator modulation circuit adapted to receive a charge level signal indicating a charge level of a battery and transmit, in response thereto, a pulsewidth modulated indicator signal to the indicator, a duty cycle of the indicator signal being a function of the charge level, the indicator thereby toggling between the inactive and active states to provide an indication of the charge level. A single indicator having only two states can therefore be employed to indicate multiple grades of battery charge level.