Performance characteristics of a battery charger and state-of-charge indicator

  • 2.63 MB
  • English

National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology , Pasadena, Calif
Battery char
StatementD. Edwards, J. Klein ; prepared for U.S. Department of Energy through an agreement with National Aeronautics and Space Administration by Jet Propulsion Laboratory, California Institute of Technology.
SeriesJPL publication -- 84-92., NASA-CR -- 174273., NASA contractor report -- NASA CR-174273.
ContributionsKlein, J., United States. Dept. of Energy., Jet Propulsion Laboratory (U.S.)
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL17667548M

Get this from a library. Performance characteristics of a battery charger and state-of-charge indicator. [D Edwards; J Klein; United States. Department of Energy.; Jet Propulsion Laboratory (U.S.)].

Performance characteristics of a battery charger and state-of-charge indicator - NASA/ADS A battery charge/state of charge indicator (BC/SCI) system for electric vehicle use was developed. The original and subsequent objectives for the Author: D.

Edwards, J. Klein. Determines battery state of charge and level of alternator output Performs both a voltage test and second battery-load test. amp capacity. Portable, fast, and very simple to use battery starting and charging system analyzer.

3 LED indicators to show the battery condition: weak, normal or strong/5(33). The only accurate way to determine the state of charge of a NiCd battery is by a measured discharge with a NiCd battery charger and following the manufacturer’s instructions. After the battery has been fully charged and allowed to stand for at least 2 hours, the fluid level may be adjusted, if necessary.

It is a measure of the short term capability of the battery. Using the analogy of a fuel tank in a car, State of Charge (SOC) estimation is often called the "Gas Gauge" or "Fuel Gauge" function.

See also State of Health (SOH) which represents the long term capability of the battery. to the alternator (generator) which in turn is connected to the battery pack and electric motor through a electronic control unit. This scheme allows the electric motor to get its power from either battery pack or the alternator or both as per the battery state of charge and vehicle acceleration requirements.

A battery charger with an indicator to indicate full charge of secondary sealed cells and like cells which become heated when subjected to overcharge current, or batteries of such cells, the indicator comprising a heat sensitive mechanism which is mounted to the charger housing and is adapted to change a perceivable characteristic in respone to the rise in temperature of the cell or battery as Cited by: BATTERY CHARGING Introduction The circuitry to recharge the batteries in a portable product is an important part of any power supply design.

The complexity (and cost) of the charging system is primarily dependent on the type of battery and the recharge time. This chapter will present charging methods, end-of-charge-detection techniques, andFile Size: KB. Battery discharge performance depends on the load the battery has to supply.

If the discharge takes place over a long period of several hours as with some high rate applications such as electric vehicles, the effective capacity of the battery can be as much as double the specified capacity at the C rate. Dear All My Civic HCH11 has been trundling along achieving l/ (57mpg).

I have noticed that the battery indicator will not drop below 4 bars. The “ready” light on a battery charger will eventually illuminate, but this does not mean “able.” There is no link between “ready” and battery performance.

The amount of energy a battery can hold is measured in capacity, a value that gradually decreases with use and time. A faded battery. According to Page of the Reference Book, a battery at or near full charge should have a hydrometer reading of: a. Note: The State of Charge Test does not measure a battery’s storage capacity or its current production (Amp-Hour) capacity.

A Load Test is. According to the state of charge, it needed more than 10 amp hours, but after 2 amp hours, the charger switched to a pulsing green light and said it was fully charged. A test instrument found that I had more than a milliohm of resistance at the connections between the battery posts and terminals/5(K).

Contact to the negative terminal at the base of the battery is by an internal metal contact. This design gives a high current density per unit volume of active materials, low resistance and impedance, high service capacity, and a relatively constant capacity over a. Monitoring the battery State of Charge (SOC) is probably the most important task to perform with a solar system.

Unfortunately this is difficult to assess with a high degree of accuracy, particularly for the novice. There are three main methods to determine battery SOC. Voltage: The voltage must be measured when the battery is 'at rest'.

Performance characteristics of a batterY charger and state-of-charge ln(H cator IITTI ~ \.l. lL" CO. = t4AjS: MH~S: ABA: AUTH: CORP: ASS: A batterY charge/state of Charg~ indicator (Be/SCi) sYstem for electrlc vehiCle use was developed" The or~glnai and subsequent objectives for the BelSCI and the rat1ona,~ for those obJectlves are descrlbed.

Description Performance characteristics of a battery charger and state-of-charge indicator FB2

Black & Decker LST Instruction Manual. 36v lithium trimmer/edger. Leaving the Battery in the Charger. State of Charge Indicator. Installing and Removing the Battery Pack. Assembly and Adjustment. Operating Instructions.

performance requirements. This white paper examines the key considerations that are best suited to meeting the challenges of including battery performance, lifespan and, of course, safety while designing intelligent battery management and charging systems.

Intelligent Cell Monitoring During the charging and discharging of an EV. Once the battery is charged, the unit switches modes to maintain and monitor optimal performance levels while extending its life by years. Safe and Easy to Set Up and Operate The Save A Battery Volt Battery Charger and Maintainer comes equipped with features to keep you and your vehicle safe, and is a snap to set up and use/5().

Determines battery state of charge and level of alternator output Performs both a voltage test and second battery-load test. amp capacity. Portable, fast, and very simple to use battery starting and charging system analyzer. 3 LED indicators to show the battery condition: weak, normal or strong/5(35).

The proposed charge equalization control uses each voltage cell as a state of charge indicator to prevent over charge or discharge of the cascaded cells which is very harmful for battery cell.

A high performance bi-directional AC-DC converter for charge equalization Abstract: To achieve high voltage and power in propulsion systems, cascade battery stacks are essential.

Because of small discrepancies in charge or discharge characteristics, even between identical batteries, voltage imbalance would happen in cascaded battery stacks.

Download Performance characteristics of a battery charger and state-of-charge indicator FB2

When the scaled value of actual battery terminal voltage exceeds the stored value, the stored value is increased to the scaled value at a rate substantially faster than the predetermined discharge rate such that the stored value is indicative of battery voltage under no-load conditions and represents the battery state of charge.

Here is a simple circuit using op-amp called “Battery voltage state indicator using ” used to indicate whether the battery is charged or not. The circuit shows three state of battery voltage i.e. charged, discharged and normal using three different color LEDs (LED 1, LED 2 and LED 3).

A battery resembles a living organism that cannot be measured; only estimated by diagnostics similar to a doctor examining a patient. The accuracy of rapid-testing varies according to symptoms. These indicators change with state-of-charge (SoC), agitation after charge and discharge, temperature and length of storage.

Thank you for choosing this product. This battery charger/rectifier is designed to provide quality DC power for many years. This user manual contains important technical and safety instructions. This manual must be read attentively before using the battery charger/rectifier to insure personnel safety and reliable operation of this equipment.

EXPERIMENTAL STUDY OF BATTERY STATE OF CHARGE EFFECT ON BATTERY CHARGING / DISCHARGING PERFORMANCE AND BATTERY OUTPUT POWER IN PV ENERGY SYSTEM K. Abed, A. Bahgat, M. Badr, M. El -Bayoumi and A. Ragheb Mechanical Engineering Department, National Research Centre, Cairo University, Egypt E-Mail: [email protected]

Battery rapid-test methods seem to dwell in medieval times, and this is especially evident when comparing advancements on other fronts. We don’t even have a reliable method to estimate state-of-charge, which is based mostly on voltage and coulomb counting.

Assessing capacity, the leading health indicator of a battery, dwells further behind. Smart charger for this product.

Details Performance characteristics of a battery charger and state-of-charge indicator EPUB

The use of switching power supply technology, superior performance electric bicycle,e-golf cars,Family battery storage system lithium battery charger dedicated, It has the characteristics of the following advantages: 1.

CE &CB& ROHS Certified, Safety and High Quality. /5(2). Charging an Automobile Battery (one cell shown). Pb + PbO 2 + 2H 2SO 4 2PbSO 4 + 2H 2O As the cell discharges, more water is formed, lowering the specific gravity of the electrolyte.

H2SO 4 + H 2O Pb PbO 2 charge Charger produces V (about 15 V for a 12 V battery)File Size: 1MB. Building the NiCd/NiMH Battery Charger, Rev. 0 4 Freescale Semiconductor charger can independently discharge or charge up to four battery cells simultaneously.

The option for discharge was chosen for NiCd chemistry to avoid the memory effect. It can also be File Size: KB.A battery indicator (also known as a battery gauge) is a device which gives information about a will usually be a visual indication of the battery's state of is particularly important in the case of a battery electric vehicle.

A dynamic state-of-charge indicator for a storage battery characterized by a discharge curve relating available energy of the battery to a contemporaneous voltage over a range of voltage boundaries having predetermined end points corresponding to fully charged and effectively discharged for one charge cycle.