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Electric tool

A technology of electric tools and circuits, which is applied in the direction of manufacturing tools, portable mobile devices, continuous battery discharge, etc., can solve problems such as accidentally touching terminals, operator injury, battery pack leakage, etc., to improve practicability and battery life, and ensure Endurance, avoid the effect of mutual charging

Pending Publication Date: 2020-02-07
CHANGZHOU GLOBE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the voltage of the battery pack is already higher than the safe voltage, there is a risk of battery pack leakage, which will cause injury to the operator
At the same time, due to the multi-battery pack design, the terminals of the battery packs are also electrically connected. During the process of using or replacing the battery pack, the terminals may be exposed, and the operator may touch the terminals by mistake. , an electric shock occurs
In addition, when the battery packs are connected in parallel, since the battery packs are electrically connected through terminals, there may be a phenomenon of mutual charging between the battery packs

Method used

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Embodiment Construction

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Here, it should be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structure and / or processing steps closely related to the solution of the present invention are shown in the drawings, and the present invention is omitted. Other details that are not relevant.

[0022] In addition, it should be noted that the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or equipment.

[0023] See figure 1 As shown, the present...

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Abstract

The invention provides an electric tool, which comprises a motor and at least two battery packs for supplying power to the motor and arranged in parallel. The electric tool also comprises a relay control circuit used for connecting the motor and the battery packs. The relay control circuit comprises a controller and relay switch circuits connected with the controller. The controller is used for detecting the electric energy and / or the use state of the battery packs and generating a pack selection signal; and the relay switch circuits and the battery packs are arranged in a one-to-one correspondence mode so as to receive the pack selection signal and control closing / opening of relay switches in the relay switch circuits, and then, the battery packs in the on state are switched to make onlyone battery pack in the on state at the same time. According to the electric tool, through arrangement of the relay control circuit, switching among the multiple parallel battery packs can be conveniently and rapidly completed, and endurance of the electric tool is guaranteed; and meanwhile, mutual charging between the battery packs due to voltage difference between the battery packs is avoided.

Description

Technical field [0001] The invention relates to an electric tool, belonging to the technical field of garden electric tools. Background technique [0002] At present, consumers have higher and higher requirements for garden power tools, and garden power tools are developing in the direction of high voltage, high power, and long battery life. [0003] In order to achieve this goal, the design of configuring multiple battery packs on garden power tools has gradually become a common understanding in the industry. Configure series or parallel battery packs on garden power tools to meet the requirements of high voltage, high power and long battery life of garden power tools. However, since the voltage of the battery pack is higher than the safe voltage, there is a risk of leakage of the battery pack, which may cause injury to the operator. At the same time, due to the design of multiple battery packs, the terminals of the battery pack are also electrically connected. During the use or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/36
CPCH02J7/36H02J7/0025H02J7/00306B25F5/00H02J7/0031A01D34/78B25F5/02H02J7/0013H02J7/0047
Inventor 陶文李标
Owner CHANGZHOU GLOBE CO LTD