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Model airplane

Design of cryogenic standby batteries for special equipment Special communication radar is a special electronic equipment which uses electromagnetic wave to detect targets. The electromagnetic wave emitted by the radar illuminates the target and receives its echo, so as to discover the target and determine its position, moving direction, velocity and other characteristics. Because of its special operational environment requirements, backup batteries need to meet the ultra-low temperature-40 conditions to provide continuous power supply and meet the operational shooting test standards.

Battery parameters

Battery Specification: LA18650-2S4P/8800mAh/7.4V

Core model: LA18650/2200mAh/3.7V

Nominal voltage: 7.4V

Nominal capacity: 8800 mAh

Battery size: 42*90*153mm

Battery internal resistance: <100m_

Battery weight: 500g

Charging conditions: 1.76 A *6.5 hours (-20 C)/4.4A *2.5 hours (25 C)

Continuous discharge current: 1.76A (-40 C)/ 4.4A (-25 C)

Protection current: 6-8A

Charging Voltage: 8.4 V

Discharge cut-off voltage: 5.0 V

Service life: charging and discharging conditions 0.5C charge 1.0C discharge, when the remaining capacity is 80%, more than 500 cycles

Charging temperature: 0-45 C

Discharge temperature: -40-60 C

Storage temperature: - 40 - 45 C (time limit)

main features

- The discharge capacity retention rate of 0.2C is over 80% and that of 0.5C is over 60%.

Cyclic life of more than 500 cycles