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Method and device for operating an energy store

A technology for accumulators and operating currents, which is applied in the direction of current collectors, transportation and packaging, and the arrangement of multiple synchronous batteries.

Active Publication Date: 2013-09-04
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the available energy range decreases over time and the operating capacity of the accumulator system decreases

Method used

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  • Method and device for operating an energy store
  • Method and device for operating an energy store
  • Method and device for operating an energy store

Examples

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Embodiment Construction

[0027] figure 1 Shows a schematic view of an accumulator. The accumulator has a plurality of accumulator modules EM m , for example four accumulator modules EM m . Each accumulator module EM m Including multiple accumulator cells EZ m,z , for example three accumulator cells EZ m,z . Preferably each accumulator module EM m including the same number of accumulator cells EZ m,z , these accumulator cells are designed similarly in terms of materials and construction technology. Accumulator unit EZ m,z At least some of them have different states of charge.

[0028] Each accumulator unit EZ m,z Each is electrically coupled to a monitoring unit, which is designed such that each accumulator unit EZ m,z With a predetermined symmetrical current I s discharge. Symmetrical current I s Preferably, all monitoring units are approximately of the same size, in particular of the same size. Symmetrical current I s For example with approximately 60mA.

[0029] The monitoring unit...

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Abstract

The invention relates to an energy store comprising at least one energy storage module (EMm) having a plurality of energy storage cells (EZm, z). The energy storage cells (EZm, z) are each electrically coupled to a monitoring unit. Each monitoring unit is designed to discharge the respective energy storage cell (EZm, z) by means of a specified symmetry current (Is) in an active operating state. The method comprises the following steps: an open-circuit voltage (OVCm, z) of each energy store cell (EZm, z) is detected and a discharge duration (t_aktivm, z) is determined for each energy storage cell (EZm, z) as a function of the open-circuit voltage (OVCm,z) of the energy storage cell (EZm, z) and a specified target discharge voltage value (U_global_min). Furthermore, each monitoring unit is controlled in order to discharge the respective energy storage cell (EZm, z) by means of the specified symmetry current (Is) for the discharge duration (t_aktivm, z) associated with the respective energy storage cell (EZm, z).

Description

technical field [0001] The invention relates to a method and a device for operating an electrical energy storage device comprising at least one electrical storage module having a plurality of electrical storage cells. Background technique [0002] Due to the low CO 2 emissions, there is growing interest in battery-powered vehicles, especially with hybrid drive. Compared with conventional vehicles, vehicles with a hybrid drive have an additional energy store in which recuperated energy can be stored. For the function of battery-driven vehicles and hybrid vehicles, the operating capacity of the accumulator plays an important role. Modern high-voltage batteries of hybrid and battery vehicles have a number of accumulator cells connected in series. The operating capacity of these batteries with a plurality of energy storage cells connected in series results from the sum of the operating capacities of the individual energy storage cells. Due to production-related manufacturing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L11/18
CPCH02J7/0014H02J7/0016B60L58/22Y02T10/70
Inventor M·格罗尔O·波伦E·德尔波诺
Owner BAYERISCHE MOTOREN WERKE AG
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