POWERING REMOTE WIRELESS DEVICES
Remote wireless devices are being designed with increased functionality, which increases power consumption. To ensure long-life, these remote wireless devices are typically designed to operate mainly in a “sleep” mode to conserve energy, with daily power consumption ranging from nil to a few microamps, briefly alternating with an “active” mode that requires high pulses of up to several amps to energize the device for data acquisition and communication before returning to “sleep” mode.
Wireless sensors that remain dormant at elevated temperatures then periodically require high current pulses may experience lower transient voltage readings during the initial phases of battery discharge. This phenomenon, known as transient minimum voltage (TMV), is strongly correlated to the chemical make-up of the electrolyte and/or the design of the cathode. Tadiran offers two effective solutions to combat TMV: PulsesPlus™ batteries for high pulse applications; and TRR Series batteries for moderate pulse applications.
PulsesPlus™ lithium thionyl chloride batteries combine a long-life bobbin-type LiSOCL2 cell with a patented hybrid layer capacitor (HLC) that stores and generates high pulses. PulsesPlus batteries feature high voltage, high capacity, low self-discharge (less than 1% per year), low ESR (Equivalent Serial Resistance), a wide operating temperature (-40°C to 85°C). PulsesPlus batteries also offer the potential for an end-of-life indication, including a 3.6v system with a 5% end-of-life indication; and a 3.9v system with a 10% end-of-life indication.
For applications requiring moderate pulses, Tadiran Rapid Response TRR Series batteries offer a cost-effective solution, as these batteries do not require the use of an HLC but still deliver high capacity and high energy density without experiencing voltage drop or power delay.
When a standard LiSOCl2 battery is first subjected to load, voltage can drop temporarily, and then return to its nominal value. TRR Series batteries virtually eliminate this voltage drop under pulse (or transient minimum voltage), resulting in zero delay during the voltage response. TRR Series batteries also utilize available capacity more efficiently, and thus can potentially extend the operating life of the battery by up to 15% under certain conditions, especially in extremely hot or cold temperatures.
INTRODUCING A NEW RECHARGEABLE LITHIUM BATTERY
While bobbin-type lithium thionyl chloride (LiSOCL2) batteries remain the preferred choice for remote wireless sensors designed for longterm use in extreme environmental conditions, new applications are emerging that are well suited to energy harvesting devices in conjunction with rechargeable lithium batteries that store the harvested energy.
Standard rechargeable lithium-ion cells have inherent drawbacks that limit overall performance in certain applications, including short operating life (maximum 5 years), low maximum cycle life (1,000 cycles), a high annual self-discharge rate (up to 60% per year), and a limited temperature range (0°C to 60°C) with no possibility of charging at low and high temperatures.
To address these problems, Tadiran recently introduced TLI Series lithium-ion batteries, which utilize a modified version of the patented hybrid layer capacitor (HLC) to deliver improved performance, including 20 year service life, 5,000 recharge cycles, extremely low annual self-discharge (less than 5% per year), the ability to deliver high pulses (up to 5A for AA cell), plus a much wider operating temperature range (-40°C to 85°C, with storage up to 90°C, able to be recharged at extreme temperatures). TLI Series rechargeable batteries come in standard AA and AAA sizes, and custom battery packs.
A worldwide leader in lithium battery technology, Tadiran manufactures a complete line of lithium thionyl chloride batteries, including the iXtra Series, XOL Series, PulsesPlusTM Series for high pulse applications (Amps), TRR Series for medium pulse applications (hundreds of Milliamps), TLM Series lithium batteries for very high rate (tens of Amps) mil/aero and medical applications, and TLI Series rechargeable lithium-ion batteries.
Validated by millions of batteries that were still operational after 25+ years, Tadiran offers unrivaled manufacturing and quality systems that deliver unmatched product reliability and incredible long-life performance. The longevity of Tadiran batteries is directly related to the battery’s extremely low self-discharge (less than 1% per year), which results from the unique combination of lithium thionyl chloride chemistry, bobbin-type construction, and proprietary manufacturing techniques that enhance product quality and reliability: processes that are continuously refined to deliver industry-leading battery performance.
To learn more about the wide spectrum of Tadiran lithium batteries, visit our website: www.tadiranbat.com.