Chervon (Hk) Limited

Nanjing Chervon Industry Co., Ltd.

Nanjing Chevron Industry Co., Ltd.

Chervon Limited

Haiyan Li

Dezhong Yang

Lei Liu

Li Li

Junya Duan

Weipeng Chen

Chao Xian

Kaichao Dai

Hekun Wu

Chenzhong Zhang

Zengbing Guo

A chainsaw includes a main machine, a battery pack, and a connection assembly. The battery pack is configured to supply energy to the main machine. Moreover, the battery pack and the main machine are separated from each other. The connection assembly is configured to connect the main machine and the battery pack so that the battery pack is electrically connected to the main machine. The main machine includes a chain, a guide plate, a motor, and a housing. The chain is configured to perform a cutting function. The guide plate is configured to support the chain. The motor is configured to drive the chain to move. The housing is configured to accommodate at least part of the motor. The connection assembly is detachably connected to the main machine or the battery pack.

Chainsaw

A power tool includes a power connection terminal, a power system, a main control switch, and a power supply protection circuit. A power supply path is disposed between the power connection terminal and the power system. The main control switch and the power supply protection circuit are configured to control the power supply path to be completed or broken. During the use of the tool, the power tool is not restarted if the main control switch is turned on before an external power source that meets a power supply requirement is connected.

Power tool

A power tool includes an electric motor, a functional accessory capable of being driven by the electric motor, a detection device for detecting a rotational speed of the electric motor, and a controller for controlling the electric motor with a control signal. The control is operable to estimate a load parameter according to a duty cycle of the control signal and the rotational speed of the electric motor such that the electric motor is caused to be operated by the controller with a lower rotational speed under a lower load and a higher rotational speed under a higher load.

Power tool and control method thereof

A charging assembly and a charging control method are provided for charging a battery pack according to an actual voltage of a battery in a battery pack. The charging assembly includes a battery pack having a battery with a rated charging current, a charger having a charging module for outputting an output voltage and an output current, and a charging circuit between the charging module and the battery. A method of operation includes: detecting the output current and the output voltage; calculating an actual voltage value on the battery; and determining whether to decrease or keep the output current or increase the output current of the charging module.

Charging control method and charging assembly

Growing community of inventors

Nanjing, China

Haiyan Li