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Apparatus and method for state of charge compensation of an energy storage system

A state-of-charge and balance technology, applied in circuit devices, battery circuit devices, load balancing in DC networks, etc., can solve the problems of high cost, high consumption, low energy efficiency, etc., and achieve the effect of reducing costs

Active Publication Date: 2016-02-10
ROLLS ROYCE DEUT LTD & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] This dissipative approach is generally energy inefficient and has high costs due to the intensive monitoring by the battery management system
Furthermore, it has been found to be disadvantageous that the targeted discharge of the battery generates waste heat via ohmic resistors, which cannot be utilized effectively at all operating points
Furthermore, this is sometimes not possible in every operating state

Method used

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  • Apparatus and method for state of charge compensation of an energy storage system
  • Apparatus and method for state of charge compensation of an energy storage system

Examples

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Embodiment Construction

[0026] The examples described next are preferred embodiments of the present invention. However, in the examples, the described components of the embodiment represent the features of interest of the invention individually and independently of each other, which also improve the invention independently of each other and thus also individually or in different ways. The combinations shown are considered to be part of the invention. Furthermore, the described embodiments can also be supplemented by other features of the invention which have already been described.

[0027] figure 1 A device 1 for balancing states of charge is shown. The device 1 has four submodules 40 . Each of the submodules 40 comprises an energy storage module 13, on which the energy storage module voltage U M . Energy storage module voltage U M sent to the voltage conversion module 20. The voltage conversion module 20 includes voltage conversion elements 21 , wherein each voltage conversion element 21 has...

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Abstract

An apparatus for state of charge compensation includes at least two energy storage modules, each energy storage module having an energy storage module voltage, at least two voltage converter modules, with each voltage converter module being electrically connected to a respective one of the at least two energy storage modules in one-to-one correspondence and forming a corresponding submodule, an electrical machine electrically connected to the at least two submodules, and a control device configured to control a flow of electrical energy between at least one of the submodules and the electrical machine.

Description

technical field [0001] The invention relates to a device for equalizing states of charge and a method for equalizing states of charge. Background technique [0002] In order to supply the electrical components with energy, an electrical accumulator or power store is usually provided. Such accumulators or power stores can be, for example, batteries, which supply the battery voltage, or capacitors. In order to achieve the desired voltage height, cells are usually connected in cell stacks. In low-voltage applications, the voltage height is generally set to be lower than 60 volts, and in high-voltage applications, the voltage height is generally set to be greater than 60 volts, especially greater than 100 volts. Energy stores in high-voltage applications can be provided, for example, to supply energy to an electric machine, for example an electric motor in a motor vehicle. [0003] Especially for high-voltage applications, the voltage of a single battery stack is often not su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCB60L50/51B60L58/22H02J7/0014Y02T10/70Y02E60/10H01M10/441H02J1/16
Inventor 德拉甘·米库莱茨蒂穆尔·维尔纳沃尔夫冈·魏丹茨
Owner ROLLS ROYCE DEUT LTD & CO KG