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Energy storage device and operating method

An energy storage device and kinetic energy technology, which is applied in electromechanical devices, vehicle energy storage, traction of mechanical energy storage, etc.

Inactive Publication Date: 2012-07-04
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But regarding energy density, capacitors only have a value of 2-5 Wh / kg

Method used

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  • Energy storage device and operating method
  • Energy storage device and operating method

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Embodiment Construction

[0020] The invention can be easily recognized in the schematic diagrams. Both the first electric machine 1 and the second electric machine 2 are arranged on the shaft 3 . Here, both the first rotor 12 belonging to the first electric machine 1 and the second stator 22 assigned to the second electric machine are arranged on the shaft 3 and rotate with the same angular velocity as the shaft.

[0021] The first electric machine 1 acts as a generator while storing excess kinetic energy provided by the shaft 3 , but can also be used as a drive motor and thus as a shaft drive. The first stator 13 of the first electric machine 1 is positioned stationary as usual. The first stator 13 is electrically connected to the first converter 4 for converting alternating current into direct current. The second stator 22 of the second electric machine 2 is correspondingly connected via a slip ring 31 communicating with the shaft 3 to a second converter 5 for converting alternating current into d...

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Abstract

In order to store excess kinetic energy, an energy storage device and an operating method are described, in which the kinetic energy can be partially converted into electrical energy by a first electric machine (1) using at least two electric machines (1, 2) arranged on a shaft (3) and can be partially converted into additional kinetic energy, such as rotational energy, by a second electric machine (2). The method for energy storage of excess kinetic energy provides for converting kinetic energy partially into electric energy and partially into additional kinetic energy, such as rotational energy.

Description

technical field [0001] The invention relates to an energy storage device for short-term storage of excess kinetic energy. A method of operating the device is also described. Background technique [0002] A common form of energy into which excess kinetic energy is converted, for example, is chemical energy, wherein the kinetic energy is first converted into an electric current with which, for example, a lead battery is charged. The generated current can also be stored as electrical energy, for example in capacitors, in particular in high-power capacitors, so-called “supercaps”. Another possibility is to store the mechanical energy as kinetic or potential energy, a flywheel storage being mentioned as a variant. [0003] Such energy storage devices can be employed, for example, in hybrid or electric vehicles. In particular, high-power capacitors for storing electrical energy are used as highly dynamic buffer memories. In the case of energy storage devices (e.g. conventional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/02B60L50/15B60L50/30
CPCH02K16/025Y02T10/7033B60L11/16Y02T10/641Y02T10/7005B60L11/18B60L50/30H02K7/025Y02E60/16Y02T10/64Y02T10/70
Inventor G.巴赫迈尔D.贝格曼M.格利希G.派斯C.图姆普
Owner SIEMENS AG