mobile | classic
Dataweek Electronics & Communications Technology Magazine





Follow us on:
Follow us on Facebook Share via Twitter Share via LinkedIn


Search...

Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2019


 

Durability, dependability and other factors make for an ideal solar battery solution
21 February 2018, Power Electronics / Power Management

Once the sun goes down or it gets cloudy, a solar system is only as good as the method used to store the harvested solar energy. Batteries are normally used as a power bank to provide the necessary storage to ensure the continuity of power supply by storing the surplus energy during the day. Battery capacity, power consumption, depth of discharge and round-trip efficiency need to be considered when choosing a battery for a solar power application.

Capacity is the total amount of electricity the battery can store. The power consumption and the depth of discharge (DOD) will affect the power storage plan and battery service life. The round-trip efficiency or energy conversion efficiency represents the ratio of energy put in versus the energy retrieved from storage. The energy plan should match the supply to the demand, and ensure the storage is sufficient to cover the periods when sunlight is not available.

Battery life is another factor to account for when choosing a battery. A battery with good cycle performance has much better economic benefit. The relative cost is lowered considerably, especially for applications in cycle use such as solar. Also, if the battery is installed in an environment without a temperature control system, a battery with a wider operating temperature range is better adapted to changes in ambient operating temperatures, resulting in prolonged battery life.

DIY or specialist installer?

For a small portable device or a home solar application, it may not be necessary to seek expert assistance. One could merely list the expected power consumption requirements and select the battery storage that is sufficient for the demand. Naturally, it is always important to follow the product installation instructions and make sure all the charging and discharging settings are correct and place the battery in a suitable working environment.

For a sizeable solar application, a specialist company is required to design a power solution to ensure that all details are taken into account. The battery solution might include not only the batteries, but also racks, temperature control system, online battery monitoring, etc. A battery management system (BMS) can also be beneficial; this typically comprises a more complete functional design to monitor the state of the battery in terms of voltage, temperature, charge, discharge, state of battery health, coolant flow and battery current. A BMS can also calculate the power requirements to adjust parameters dynamically, and implement a battery protection system to prevent the battery from entering an erroneous operation mode.

Maintenance and monitoring

A BMS is recommended for solar applications which should cover battery monitoring and protection features. However, a full-featured BMS is costly and may not be an option for consumers with a limited budget. Regardless, it is always recommended that the battery should be placed in an environment with temperature control, with the ideal operating temperature being between 20°C and 25°C.

Battery life might be reduced or the possibility of thermal runaway increased when operating at too high a temperature. In contrast, the discharge time will decrease if the battery is working at a lower temperature, and charging at a lower temperature may also shorten service life. Faulty procedures or inadequate charging methods, over-discharge, over-charge and insufficient charging time will result in failure to recover to normal capacity, reduced capacity, or shortened battery service life.

For solar applications, in particular, it is essential to know the power demand. The correct storage and charging plan is vital to avoid battery damage. It is also necessary to perform periodic maintenance for assurance of the optimum reliability of the battery if there is no battery monitoring or control system. Inspections can be conducted to identify a gradual decrease of the capacity of the system and to detect any abnormal error or individual battery conditions that may impact on system reliability.

Sealed lead-acid meets solar challenges

A sealed lead-acid battery is the least expensive battery option per watt-hour. The manufacturing process for sealed lead-acid batteries is a mature, reliable and well-understood technology. Sealed lead-acid batteries offer a wide range of capacity options for different applications and equipment. What is more, sealed lead-acid batteries have one of the lowest self-discharge rates in the family of rechargeable battery systems. This means they are not only economical, they also have two critical abilities – durability and dependability.


Credit(s)
Supplied By: Forbatt SA
Tel: +27 11 469 3598
Fax: +27 11 469 3932
Email: sales@forbatt.co
www: www.forbatt.co/index.php
  Share on Facebook Share via Twitter Share via LinkedIn    

Further reading:

  • High-side switch for 12 V systems
    29 May 2019, Altron Arrow, Power Electronics / Power Management
    The Power PROFET BTS50010-1TAE from Infineon Technologies is a high-side switch designed to drive currents up to 40 A d.c. in 12 V systems. With an on-resistance down to 1,0 m, the device is packaged ...
  • USB-C buck charger
    29 May 2019, CST Electronics, Power Electronics / Power Management
    Designers of portable Li-ion battery-powered electronics can add a USB Type-C (USB-C) charging system to their products with the MAX77860 3A switch-mode charger from Maxim Integrated Products. The device ...
  • PMBus power modules
    29 May 2019, Hi-Q Electronics, Power Electronics / Power Management
    Renesas’ new encapsulated hybrid digital power modules offer high power density and efficiency for advanced FPGAs, DSPs, ASICs and memory. The ISL8210M and ISL8212M feature power density of 115 mA/mm2 ...
  • SiC MOSFETs and Schottky diodes
    29 May 2019, Altron Arrow, Power Electronics / Power Management
    Microchip Technology announced, via its Microsemi subsidiary, the production release of a family of SiC (silicon carbide) power devices that offer ruggedness and the performance benefits of wide-bandgap ...
  • Synchronous boost converter
    29 May 2019, NuVision Electronics, Power Electronics / Power Management
    The superior properties of Li-ion batteries, such as high energy density, light weight, no memory effect, and less self-discharge, make them a very popular option in portable applications. ICs with ...
  • AC-DC linear regulator
    29 May 2019, Avnet South Africa, Power Electronics / Power Management
    Texas Instruments expanded its portfolio of linear regulators by introducing the TPS7A78, which uses a unique switched-capacitor architecture to eliminate discrete components, including external inductors ...
  • Current shunt monitor
    29 May 2019, Altron Arrow, Power Electronics / Power Management
    ON Semiconductor’s NCP45491 is a high-performance monolithic IC which can be used to monitor bus voltage and current on four high-voltage power supplies simultaneously. The HV bus voltages and currents ...
  • Power modules for avionics
    29 May 2019, Conical Technologies, Power Electronics / Power Management
    SynQor announced its new AeroQor product line specially designed for commercial avionics. The AeroQor range is composed of high-efficiency, isolated power factor correction modules (APFIC) and AC filters ...
  • Railway DC-DC converters
    29 May 2019, Conical Technologies, Power Electronics / Power Management
    Traco Power announced the release of the new TEQ line of DC-DC converters for railway electronics systems. The TEQ 20WIR and 40WIR are two series of isolated modules with 4:1 input voltage ranges which ...
  • High-frequency 650 V IGBTs
    29 May 2019, Altron Arrow, Power Electronics / Power Management
    The STMicroelectronics HB2 650V IGBT series delivers efficiency and performance gains for medium- and high-speed applications such as PFC converters, welders, uninterruptible power supplies (UPS) and ...
  • 15 Watt DC-DC converter
    30 April 2019, Conical Technologies, Power Electronics / Power Management
    The THL 15WI series is Traco Power’s latest addition to the existing 15 Watt DC-DC converter range. The series comes in an encapsulated, shielded 2,54 x 2,54 x 1,016 cm metal package and has a fully ...
  • Tips for resolving common battery faults
    30 April 2019, Forbatt SA, Power Electronics / Power Management
    Forbatt SA not only provides high-quality batteries but advises on maintaining batteries and prolonging their lifespan. The following is a quick guide for how to spot and resolve common battery faults ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronics Buyers’ Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    Classic | Mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.