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Method for efficient discharge of rechargeable batteries

A technology of rechargeable battery and current intensity, which is applied in the direction of battery circuit devices, batteries, secondary batteries, etc., and can solve the problems that the rechargeable battery capacity cannot be used, and the user of the power tool is no longer available.

Pending Publication Date: 2022-03-25
HILTI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the disadvantage is that when the temperature threshold is reached, the rechargeable battery is usually not fully discharged, or there is still capacity (voltage) in the rechargeable battery cells, which however is no longer available to the user of the power tool
In other words: the full capacity of the rechargeable battery cannot be used due to premature overheating of the rechargeable battery cells

Method used

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  • Method for efficient discharge of rechargeable batteries
  • Method for efficient discharge of rechargeable batteries

Examples

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Embodiment Construction

[0022] figure 1 A system 1 according to the present invention is shown comprising a power tool 2 and a rechargeable battery 3 . The rechargeable battery 3 is connected to the power tool and is used to supply electrical energy to the electrical load of the power tool 2 . During supply, current flows from the rechargeable battery 3 to the power tool 2 .

[0023] According to an alternative embodiment of the invention, the power tool 2 may be supplied with electrical energy not by at least one rechargeable battery but by a network connection. Network connections can also be referred to as power cables. This alternative embodiment of the invention is not shown in the drawings.

[0024] like figure 1 As shown, the power tool 2 is shown in the form of a rechargeable battery-operated screwdriver. According to other alternative embodiments, the power tool 2 may also be designed in the form of a power drill, saw, grinder or the like.

[0025] A power tool 2 designed as a recharge...

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PUM

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Abstract

The invention provides a method for open-loop and closed-loop control of a power tool having at least one rechargeable battery acting as an energy source for the power tool, a drive and at least one control device. The method comprises the following method steps: recording at least one temperature value of the rechargeable battery by means of a temperature measuring device; recording at least one first voltage value of the rechargeable battery by means of a voltage measuring device; and if the recorded temperature value corresponds to a predetermined temperature threshold value and the recorded voltage value corresponds to a predetermined voltage threshold value, setting a first performance parameter value of the power tool as a second performance parameter value of the power tool for setting a current intensity value. A system is also provided that includes a power tool and at least one rechargeable battery for supplying electrical energy to the power tool to perform the method.

Description

technical field [0001] The present invention relates to a method for open-loop and closed-loop control of a power tool having at least one rechargeable battery, a driver and at least one control device, the rechargeable battery serving as an energy source for the power tool. [0002] Furthermore, the invention relates to a system comprising a power tool and at least one rechargeable battery for supplying electrical energy to the power tool for carrying out the method according to the invention. Background technique [0003] Modern power tools (eg, hammer drills, saws, grinders, etc.) have [0004] A problem that arises when using rechargeable batteries as a power source for power tools is that the rechargeable batteries heat up due to the internal resistance of the rechargeable battery cells (also referred to as output resistance) when electrical energy is delivered. For safety reasons, the delivery of electrical energy from the rechargeable battery ends when the rechargeab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/00309H02J7/00036H02J7/0047H02J7/0045H02J7/0063H02J7/007182H02J7/007192H01M10/443H01M10/486H01M10/48H01M10/425H01M2220/30H02J7/007194Y02E60/10H02J7/00032
Inventor S·迈尔K·豪泽D·科斯切克
Owner HILTI AG