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Method for detecting self-discharge defects in battery cells

A technology of battery cells and detection cells, applied in battery circuit devices, measurement of current/voltage, arrangement of multiple synchronous batteries, etc., can solve problems such as impossibility, delay in self-discharge defect detection, etc.

Active Publication Date: 2022-06-24
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection of self-discharge defects is therefore delayed or even impossible

Method used

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  • Method for detecting self-discharge defects in battery cells
  • Method for detecting self-discharge defects in battery cells
  • Method for detecting self-discharge defects in battery cells

Examples

Experimental program
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Embodiment Construction

[0063] refer to figure 1 , the storage battery 10 is shown schematically. The battery 10 is designed to be incorporated into an electrically propelled motor vehicle for powering electric traction machines belonging to the powertrain of the motor vehicle.

[0064] The battery 10 includes two terminals 14 . The battery 10 includes four battery cells (denoted as 1, 2, 3, and 4, respectively). In the example shown, cells 1, 2, 3 and 4 are connected in series. However, without departing from the scope of the present invention, it should be possible to connect the cells in parallel, or alternatively to connect some cells in parallel and the remaining cells in series. Similarly, it is clearly possible to have different numbers of units without departing from the scope of the present invention.

[0065] The battery 10 has an information connection to the management system 12 . The management system 12 is also known by the English expression "battery management system" or by the a...

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PUM

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Abstract

The method is for detecting self-discharge defects in cells (1, 2, 3, 4) in a storage battery (10) having a plurality of cells (1, 2, 3, 4), wherein: at least partially charge balance the cells (1, 2, 3, 4); relax the cells (1, 2, 3, 4); for each cell (i), calculate the cell (i) The charge balance (Σi) during the equilibration and relaxation; and for each cell (i), detected from the charge balance (Σi) calculated for the cell (i) during the equilibration and relaxation Any self-discharge defects of said cell (i).

Description

technical field [0001] The present invention relates to the control of a storage battery with a plurality of cells, which is especially intended to be incorporated into a motor vehicle. Background technique [0002] Electrically propelled motor vehicles include in particular purely electrically propelled vehicles, hybrid vehicles or rechargeable hybrid vehicles. Such vehicles are equipped with storage batteries with a large number of battery cells. The units can be installed in series and / or in parallel. [0003] As a general rule, the cells forming the storage battery have similar properties to each other. However, over the life of the battery, these cells may deviate or differ. For example, there may be variation in cell capacity, variation in cell resistance, or variation in cell charge state or variation in cell temperature may temporarily exist. These deviations can result in varying degrees of aging of each cell of the storage battery and deviations in the state of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/3842
CPCG01R19/16542G01R31/396H02J7/0016Y02E60/10B60L3/0046B60L58/22B60L58/12B60L58/16B60Y2200/91B60Y2200/92Y02T10/70G01R31/392G01R31/3842H02J7/0048H02J7/005
Inventor M·门斯勒B·德洛贝尔A·L·德里梅耶弗兰科B·阿尔萨克M·奥里古奇
Owner RENAULT SA
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