Method and device for controlling power of electric appliance based on temp.

A technology for electrical appliances and temperature control, which can be used in output power conversion devices, temperature control using electric methods, circuit devices, etc., and can solve problems such as electrical appliances shutting down.

Inactive Publication Date: 2003-08-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in order to protect the battery, it happens that the elec

Method used

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  • Method and device for controlling power of electric appliance based on temp.
  • Method and device for controlling power of electric appliance based on temp.
  • Method and device for controlling power of electric appliance based on temp.

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Embodiment Construction

[0012] exist figure 1 The block diagram shown in shows an electrical appliance 1, such as a hand-held power tool (such as a screw gun, a drill, a chainsaw, a grinder, etc.) and a power supply unit 2 that provides energy to the drive of the electrical appliance 1, The drive is represented by a motor symbol. The power supply unit 2 can be a rechargeable battery or part of a power grid. There is a temperature sensor 3 on or inside the power supply unit 2 , which senses the real-time temperature of the storage battery 2 and transmits the temperature T0 to an analysis and calculation circuit 4 . Furthermore, it is also possible to measure the temperature T1 of one or more components in the electrical appliance 1 . For this using one or more temperature sensors, the figure 1 One of the temperature sensors 5 is symbolically indicated in . The temperature value T1 or temperature values ​​T1 measured in the electrical appliance 1 are likewise transmitted to the evaluation circuit 4...

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PUM

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Abstract

An electrical appliance 1 such as a hand power tool is connected to a power supply unit 2 also known as a battery/power pack. The electric appliance is protected against overheating without necessitating abrupt stoppage of the operation of the electrical appliance. The invention includes determining a temperature or a variable which depends on the temperature of an element selected from the group consisting of a current supply unit connected with the electrical device, one or several components of the electrical device, and both, and when the determined temperature or a variable which depends on it exceeds a predetermined threshold, reducing power taken from the electrical device until the temperature or a variable which depends on it falls below the threshold or a lower threshold.

Description

technical field [0001] The invention relates to a method for controlling the power of an electrical appliance as a function of temperature and to a device for carrying out the method. Background technique [0002] It is known that overheating due to high power consumption of electrical appliances significantly reduces the service life of electrical appliance batteries. In order to protect the battery from overheating, it is proposed in DE 4106 725 A1 to switch off the electrical appliance immediately when it is determined that the temperature of the battery is too high. Therefore, in order to protect the battery, it may happen that the electrical appliance is suddenly switched off during the working process. If the electrical appliance is, for example, a drilling machine, the drilling process is abruptly interrupted when the battery overheats and the drill bit remains inserted in the hole. The drilling machine also cannot be switched on immediately to disengage the drill b...

Claims

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Application Information

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IPC IPC(8): G05F1/10H02J7/00H02M3/00
CPCH02J7/0029Y10T307/773H02J7/00309
Inventor 斯特凡·勒普克赖纳·格劳宁
Owner ROBERT BOSCH GMBH
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