FIELD: electric engineering.
SUBSTANCE: set of portable autonomous electric power tool, for instance pruners, saw, tool for fruit gathering, lawn mower, bush-cutting device, impact wrench, chisel hammer, comprises at least three separate functional unit. The first unit (2) provides for mechanical action of tool from electric drive. The second unit is the source of electric energy for the whole set and comprises mainly electrochemical accumulator battery. The third unit is charging device arranged with the possibility of controlled electrical recharging of electrochemical accumulator battery. The first unit (2) is connected in process of tool application to the second unit (3) with the help of flexible electrical cord (6), and electric supply of drive may be disconnected automatically and/or by operator. The second unit (3) may be carried by operator and comprises electrochemical lithium-ion or lithium-polymer battery arranged by means of serial connection of accumulators. At the same time each accumulator consists of one element or from several elements connected in parallel, and one or several electrical or electronic modules of monitoring and/or control of batteries located in close proximity to specified battery. The third unit (4) of charging comprises at least one source of electric supply, voltage and current of which provide for recharging of lithium-ion or lithium-polymer battery (5). And this third unit is connected electrically with the help of detachable flexible cord (10) to the second unit.
EFFECT: improving device operation reliability.
40 cl, 12 dwg
