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 2017


 

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:

  • 1800 W electronic load
    14 November 2018, Conical Technologies, Test & Measurement, Power Electronics / Power Management
    Itech announced the release of the latest addition to its electronic load range, the IT8615. This e-Load has a compact height of only 3U for an 1800 Watt load, with an AC frequency adjustable from 45 ...
  • Programmable DC power supplies
    14 November 2018, Accutronics, Power Electronics / Power Management
    TDK announced the addition of high-power GSP models to the TDK Lambda GENESYS+ series of programmable DC power supplies. This expansion now provides 2U high, 10 kW and 3U high, 15 kW versions with output ...
  • Li-ion battery fuel gauges
    14 November 2018, CST Electronics, Power Electronics / Power Management
    Designers of lithium-ion (Li-ion) battery-powered mobile and portable devices can improve the end-user experience by extending runtime and delivering accurate battery state-of-charge (SOC) data with the ...
  • AC/DC converters for cost sensitive applications
    14 November 2018, Avnet South Africa, Power Electronics / Power Management
    Aimtec's new AC/DC series offer greater cost effectiveness following new production automation, leading to improved reliability and performance. Offering a commercial input voltage range of 85-264 V a.c. ...
  • IGBT/MOSFET driver with integrated bootstrap diodes
    14 November 2018, Altron Arrow, Power Electronics / Power Management
    Infineon Technologies has introduced a new half-bridge, 650 V rated EiceDRIVER based on the company’s unique SOI technology. The 2ED2304S06F provides leading negative VS transient immunity, monolithic ...
  • High-side power switches for hot-swap ports
    14 November 2018, Altron Arrow, Power Electronics / Power Management
    Diodes Incorporated introduced the AP22815 and AP22615 3A single-channel high-side power switches for USB ports and other hot-swap applications. These devices are designed to provide protection for any ...
  • Dual-channel 4 A gate driver
    14 November 2018, EBV Electrolink, Power Electronics / Power Management
    The STGAP2DM gate driver, the second in the STGAP2 series of galvanically isolated drivers from STMicroelectronics, integrates low-voltage control and interface circuitry with two isolated output channels ...
  • DC-DC converter with integrated H-bridge
    10 October 2018, Altron Arrow, Power Electronics / Power Management
    Diodes Incorporated’s new AP72200 is a high-current synchronous buck/boost DC-DC converter with integrated high-side and low-side H-bridge MOSFETs. It delivers up to 97% efficiency with 1% voltage regulation ...
  • Half-brick DC-DC converter
    10 October 2018, Conical Technologies, Power Electronics / Power Management
    SynQor introduced the new NQ40, non-isolated half-brick DC-DC converter – a buck/boost regulator which employs synchronous rectification technology to achieve extremely high conversion efficiency. The ...
  • UCT team to build solar powered house
    10 October 2018, Power Electronics / Power Management
    Solar Decathlon challenges teams to design and build a ‘green’ house of between 55 and 110 square metres, powered by only solar energy and equipped with technically advanced building and energy technologies. ...
  • Safety of lithium-ion batteries
    10 October 2018, Uniross Batteries, Power Electronics / Power Management
    At the original time of writing of this article, in August 2016, Tesla Motors expected to consume two billion Li-ion cells by 2017. Both the Tesla Model S and Model X electric vehicles (EV) get their ...
  • Power monitoring IC with reinforced isolation
    10 October 2018, Altron Arrow, Power Electronics / Power Management
    Allegro MicroSystems has released a fully integrated, small form-factor power monitoring IC with reinforced voltage isolation. The ACS724 and ACS711 current sensor ICs are commonly used in Internet-connected ...

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