A double pack lithium battery lawn mower

Abstract

Disclosed in the present invention is a double-pack lithium electric lawn mower comprising a DC motor for driving a cutting blade, wherein the DC motor is connected with a control system, and the control system is connected with a power supply; the power supply is a lithium battery pack, and the DC motor is connected with the lithium battery pack through the control system; the lithium battery pack power supply drives the DC motor through the control system, in order to drive the cutting blade to cut grass; the lithium battery pack comprises two serially connected lithium battery packs, and the control system achieves a soft start function under the control of a microcontroller U3; at a standby state or a light load state, the output duty ratio is controlled to 80%, at this time, the rotating speed of the blade can be maintained at about 2800 rpm, and when the load is increased, the output duty ratio is maximized to continue to maintain the rotating speed, thereby both meeting the application requirements and saving energy, meanwhile, greatly reducing the noise. According to the double-pack lithium electric lawn mower disclosed by the present invention, the power supply of the control system is transmitted by a sensitive switch, and the sensitive switch is at a turned off state at a standing aside state, thus ensuring the zero power consumption of standby on hardware.

Description

technical field [0001] The invention relates to a garden tool, in particular to a double-pack lithium battery mower. Background technique [0002] The lawn mowers commonly used abroad are generally gasoline lawn mowers and electric lawn mowers. Gasoline lawn mowers produce exhaust gas. In Europe, where energy conservation and environmental protection are advocated, people are more inclined to use clean and energy-saving electric lawn mowers. Existing electric lawn mowers generally use alternating current and need to use wires to connect with household power. Due to the use of wires, the working range and flexibility of use of the lawn mower are limited. There are also lead-acid batteries for power supply, but because the production of lead-acid batteries will pollute the environment, they are also being phased out. [0003] With the continuous development of the power tool and garden tool industry, cordless and portable household electric and garden tools have gradually be...

AI Technical Summary

Problems solved by technology

However, the use of lithium-ion tools has the following disadvantages: restricted by the battery capacity, the use time is limited; and if the battery capacity is increased, the volume and weight of the machine will inevitably increase, which will greatly increase the cost while affecting portability.

In addition, due to the strong seasonality of the use of garden tools, they are put on hold throughout the winter, and the characteristics of the lithium battery will also generate power consumption in the static state, causing the voltage of the lithium battery to gradually decrease until it is undervoltage

Long-term undervoltage will inevitably affect the life of lithium batteries, and even lead to failure

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