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Device and method for compensating charges of series-connected energy stores

An accumulator, series arrangement technology, applied in circuit devices, battery circuit devices, output power conversion devices, etc., can solve the problem that the oscillation tilt is not the optimal magnetic core storage characteristics

Inactive Publication Date: 2009-07-08
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A general attempt is made to avoid switching gaps (i.e. time intervals in which the magnetic storage element remains completely discharged) because of the ensuing increased oscillatory tilt and suboptimal use of the storage characteristics of the magnetic core

Method used

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  • Device and method for compensating charges of series-connected energy stores
  • Device and method for compensating charges of series-connected energy stores
  • Device and method for compensating charges of series-connected energy stores

Examples

Experimental program
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Embodiment Construction

[0047] already explained above Figures 1 to 3 .

[0048] exist Figure 4 A block circuit diagram of a basic circuit according to the invention for charge compensation of an energy store is shown in . A direct voltage is generated by a first converter (DC / DC converter 1 ). The DC voltage is inverted by a second converter (DC / AC converter 2 ) at a pulse frequency of eg 50 kHz, and the AC bus 4 is loaded with the AC voltage. Here, the system of wires (cables, copper busbars, etc.) is called a bus.

[0049] The series-connected batteries Z1 to Zn of the double-layer capacitor DLC are connected to the bus 4 via a coupling transformer Tr and a rectifier 3, respectively. Coupling transformers are used for potential separation and energy transfer.

[0050] Figure 5 A first exemplary embodiment of a circuit arrangement according to the invention for charge compensation of an energy store (battery) is shown. Single battery Z on Double Layer Capacitor DLC 1 to Z n The reduced ...

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Abstract

The invention relates to a device and a method for charge compensation of individual batteries connected in series with an energy storage with a DC / DC converter which draws from said energy storage or from another energy source Energy is extracted, whereby the intermediate circuit capacitor is charged, the voltage of which is inverted in the DC / AC converter and the alternating voltage is converted via the AC bus line and the coupling transformer into a pulsating direct current with the aid of a rectifier, and the The pulsating DC current charges the battery with the lowest battery voltage.

Description

technical field [0001] The invention relates to a device and a method for charge compensation of series-connected energy accumulators, in particular series-connected capacitors (batteries), such as double-layer capacitors used in automotive vehicle electrical systems. Background technique [0002] For example, when accelerating the internal combustion engine (boost) via the integrated starter generator operating as an electric motor or during regenerative braking (recuperation) via the integrated starter generator operating as a generator When converting kinetic energy into electrical energy, double-layer capacitors have proven to be the most interesting technical solution for storing and delivering short-term high power in automotive vehicle electrical systems. [0003] The maximum voltage of a single cell of a double-layer capacitor is limited to about 2.5V to 3.0V, so that for a voltage of eg 60V (a typical voltage value of double-layer capacitors used in 42V vehicle elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02M3/335H02M3/337
CPCY02T10/7055H02J7/0018H02J7/0014H02J7/0016H02J7/345Y02T10/70
Inventor S·博尔茨M·戈特詹伯杰R·克诺尔G·卢格尔特
Owner CONTINENTAL AUTOMOTIVE GMBH