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Method for operating a battery module

A battery module, battery cell technology

Active Publication Date: 2021-04-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vehicles do not have to be cut off immediately in the event of a breakdown, as this creates a safety hazard for traffic behind

Method used

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  • Method for operating a battery module
  • Method for operating a battery module
  • Method for operating a battery module

Examples

Experimental program
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Effect test

Embodiment Construction

[0046] In the subsequent description of embodiments of the invention, identical or similar elements are identified with the same reference numerals, a repeated description of these elements being omitted in individual cases. The figures show only schematically the subject-matter of the invention.

[0047] figure 1 A schematic diagram of a battery module 5 with a plurality of battery cells 2 is shown. The battery cells 2 are currently electrically connected in series. Each battery cell 2 comprises electrode units having an anode and a cathode, respectively. The anode of the electrode unit is connected to the negative terminal of the battery cell 2 . The cathode of the electrode unit is connected to the positive terminal of the battery cell 2 . In order to connect the battery cells 2 of the battery module 5 in series, the negative terminals of the battery cells 2 are each electrically connected to the positive terminals of the adjacent battery cells 2 .

[0048] The battery...

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Abstract

The invention relates to a method for operating a battery module having multiple battery cells (2), comprising the following steps: a) determining the cell voltages (US) of the individual battery cells (2) at a starting time; b) determining an average cell voltage (MS) from the cell voltages (US) of the battery cells (2) at the starting time; c) estimating the cell voltage of at least one battery cell (2) at an operating time if the cell voltage of the battery cell (2) is not measurable at the operating time, wherein, when estimating the cell voltage of the battery cell (2) at the operating time, the cell voltage (US) of the battery cell (2) determined at the starting time, the average cell voltage (MS) determined at the starting time, and an average cell voltage determined at the operating time are taken into account, wherein the average cell voltage determined at the operating time is determined from the cell voltages of the remaining battery cells (2) measured at the operating time.

Description

technical field [0001] The invention relates to a method for operating a battery module having a plurality of battery cells, in particular in an electrically driven vehicle, in which the cell voltage of the individual battery cells is determined. The method according to the invention allows, in particular, a further operation of the battery module in the event of a fault, when the cell voltage of the battery cells cannot be measured at the operating time. Background technique [0002] Modern battery modules of battery systems of electrically driven vehicles have a plurality of battery cells. The battery module is designed such that the individual battery cells are connected in series with one another in order to be able to provide a sufficiently high voltage. When the vehicle is running, the battery cells used to drive the vehicle and to supply further consumers are discharged. However, when the vehicle is at a standstill, small discharges also occur in the form of self-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00H02J7/00G01R31/396G01R31/3835B60L58/21
CPCG01R31/367G01R31/3835G01R31/396B60L3/0038B60L3/0046B60L58/21B60L2240/547H02J7/0014Y02T10/70H02J7/0048H02J7/005B60L58/12H02J7/0013H02J7/0047
Inventor C·沃尔沈图南A·施密特
Owner ROBERT BOSCH GMBH