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Method and device for determining the internal resistance of a plurality of battery cells of a battery

A technology for accumulators and accumulators, applied in batteries, measuring devices, secondary batteries, etc., to avoid mutual differences

Inactive Publication Date: 2017-09-12
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] A disadvantage of the methods known from the prior art for determining the internal resistance of a plurality of battery cells or of a plurality of battery modules contained in a battery of a battery direct converter is that at least one battery module should be connected via the connection. The at least one battery module determining the internal resistance of its battery cells significantly increases the output voltage of the battery comprised by the battery direct converter

Method used

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  • Method and device for determining the internal resistance of a plurality of battery cells of a battery
  • Method and device for determining the internal resistance of a plurality of battery cells of a battery
  • Method and device for determining the internal resistance of a plurality of battery cells of a battery

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Embodiment Construction

[0035] figure 2 A schematic circuit diagram of a drive system 10 is shown, comprising a battery 100 connected to an electric machine 60 according to the described first embodiment of the invention, which battery is driven by means of a direct battery converter. The battery system 101 comprises a battery 100 which is connected to a DC voltage intermediate circuit (not shown) comprising a capacitor 40 . Also connected to the direct voltage intermediate circuit is the pulse inverter 50 comprised by the battery system 101 , which is connected to the three-phase motor (electric drive motor) 60 at its three outputs via two A controllable semiconductor valve (not shown) and two diodes (not shown) provide multiple sinusoidal voltages which are phase shifted from each other.

[0036] Battery 100 includes a battery pack 110 with a plurality of battery modules connected in series, of which only a first battery module 220 and a second battery module 230 are explicitly shown in the drawi...

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Abstract

The invention relates to a method for determining the interior of a plurality of battery cells of a plurality of battery modules (220, 230) arranged in at least one battery pack (110) of a battery (100) connected to an electric machine (60). blocking method. Wherein, the plurality of battery modules (220, 230) are configured in order to generate an adjustable output voltage (UB) of the battery (100) to be connected in series to the battery pack (110) of the battery (100) and the slave battery The group (110) is decoupled. According to the invention, at least one first battery module (220) decoupled from the battery pack (110) is connected to the battery pack (110) during operation of the electric machine (60) and the at least one first connected battery module (220) is determined The internal resistance of multiple battery cells. Furthermore, simultaneously with the connection of the first battery modules (220), a sufficient number of second battery modules (230) connected to the battery pack (110) are decoupled from the battery pack (110) generating a voltage (UM) UM) coincides with the voltage (UM) generated by the first connected battery module (220) within predetermined tolerance limits.

Description

technical field [0001] The invention relates to a method and a corresponding device for determining the internal resistance of a plurality of battery cells of a plurality of battery modules of a battery connected to an electric machine, which are arranged in at least one battery pack, wherein the plurality of battery modules are It is designed to be able to be connected in series to at least one battery pack of the battery and to be decoupled from the battery pack, respectively, in order to generate an adjustable output voltage of the battery. Furthermore, the invention relates to a battery comprising a plurality of battery modules, each having at least one battery cell, which are arranged in at least one battery pack and are designed to generate an adjustable output voltage of the battery. A battery pack can be connected in series to and decoupled from the battery pack. Furthermore, the invention relates to a motor vehicle having such a battery. Background technique [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36H01M10/00
CPCH01M10/482H01M2010/4271H01M2220/20G01R31/396G01R31/389Y02E60/10G01R31/385
Inventor H·芬克
Owner ROBERT BOSCH GMBH
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