Power

Lithium-thionyl chloride battery pack is designed for water metering

10th October 2016
Caroline Hayes

Offered in an industry standard package size for water metering applications, the BS1200C1425001S1PCMW, Lithium-thionyl chloride battery pack, has a 3.6V operating voltage and 1200mAh current capacity. The UL1642-certified 1/2AA cell has a standard capacity of 1200mAh with a 25mA continuous discharge current (mA) capacity, says GlobTek.

It has a -60 to +85°C operating rating, although one special series has an extended temperature range up to +150°C, and a termination voltage of 2.0V.

The battery has an open-circuit voltage of 3.67V and an operating voltage of 3.60V, which are considerably higher than in any other commercially available primary batteries, says the company. The electrochemical system exhibits the highest energy density of any available primary battery, up to 650Wh/kg and 1280Wh/L.

Lithium-thionyl chloride cells (Li-SoCl2) have a metallic lithium anode (acknowledged to be the lightest of all the metals) and a liquid cathode, comprising a porous carbon current collector filled with thionyl chloride (SOCl2). They deliver a voltage of 3.6V and are cylindrical in shape, in 1/2AA to D format, with spiral electrodes for power applications and bobbin construction for prolonged discharge.

The batteries are defined by high voltage and energy, long storage, and the lowest self-discharge rate. The self-discharge of Li/SOCl2 battery is less than 1% per year at 20℃, which can support long storage periods and achieve a service life of 10 to 20 years. The batteries are suitable for long-term applications, such as automated meter reading, alarms and security wireless devices, mobile asset tracking, medical equipment, GPS, military radio communication, oil exploration and automotive telemetry, and especially as a backup power source for memory ICs.

The Lithium-thionyl chloride battery pack is supplied in an hermetically sealed case. The company says that this is essential for the long shelf life and inherent safety of the devices in which the batteries are used. The cover is welded to the can. A glass-to-metal seal is used to insulate the positive terminal. A safety vent is used on the negative terminals for spiral type.

Visit GlobTek at electronica 2016 - Hall A2 - 660

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