Military UAV lithium battery design scheme

Foreword: In response to the customer's requirements for designing a power supply for drones, we designed a lithium battery based on the use characteristics of related equipment. The battery pack adopts lithium iron phosphate cells and imported chips with high safety, high consistency, high stability, and long life. It has MOS tubes for protection control and management of the battery pack. The continuous discharge current is 1C, and the UPS battery pack can provide most equipment emergency power supply.

Design requirements

According to product specifications and customer requirements, design intelligent high-current lithium batteries that match the host, and integrate high-specification safety performance, good charge-discharge performance, high-current working capability, excellent cycle life, and other functions into the solution.

2. UAV lithium battery design scheme:

1) Protection Board (PCM): According to the chemical characteristics of the lithium iron phosphate battery itself and the functional characteristics of the X-ray machine, the protection circuit is designed in a targeted manner. In addition to the overcharge, over-discharge, overcurrent, and short circuit protection functions, the protection board The design also fully considers the issues of high-power heat dissipation and the balance of the entire battery pack.
2) Protection circuit: Imported IC and MOS tube are used to conduct online real-time monitoring of overcharge, over-discharge, overcurrent, short circuit, and other functions of the battery cell. Make the cells work in a safe, stable, and efficient range.
3) Battery: A lithium iron phosphate battery is used, the maximum continuous discharge current of the battery is 1C, and the battery itself has multiple safety protection functions. The built-in battery management system can effectively avoid battery safety problems.
4) Battery pack: Resistive balance is adopted between the cells of the battery pack, which can compensate for the capacity reduction caused by the difference of the single cell during use and maximize the battery's service life.
5) The battery pack adopts plastic isolation and fixed cells, which is more conducive to heat dissipation and safe use of the battery.