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Method for determining state of charge of electrical energy storage unit

A technology of energy storage unit and state of charge, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of cruising range or working time not being used, and achieve the effect of improving accuracy

Pending Publication Date: 2021-05-07
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the cruising range or work time is not used

Method used

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  • Method for determining state of charge of electrical energy storage unit
  • Method for determining state of charge of electrical energy storage unit
  • Method for determining state of charge of electrical energy storage unit

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Embodiment Construction

[0029] The same reference numerals designate the same device components or the same method steps in all figures.

[0030] figure 1 A flow chart of the disclosed method for determining the state of charge of an electrical energy storage unit according to a first embodiment is shown. In this case, in the first step S11 in particular a mathematical reference model of the electrical energy storage unit is provided, which describes the state of charge of the electrical energy storage unit, the electrical energy storage unit The connection between the temperature of the electrical energy storage unit and at least one first aging characteristic value of the electrical energy storage unit. In this case, the reference model can already be acquired prior to the procedure of the disclosed method.

[0031] In a second step S12 , the temperature of the electrical energy storage unit is detected, for example via a temperature sensor mounted on the electrical energy storage unit. Thus, th...

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Abstract

The invention relates to a method for determining the state of charge of an electrical energy storage unit, comprising the following steps: a) providing a reference model of the electrical energy storage unit, wherein the reference model describes a relationship between a state of charge of the electrical energy storage unit, a temperature of the electrical energy storage unit and at least one first aging characteristic value of the electrical energy storage unit; b) determining the temperature of the electrical energy storage unit; c) determining at least one first aging characteristic value of the electrical energy storage unit using the detected current and / or voltage values of the electrical energy storage unit; d) ascertaining the state of charge of the electrical energy storage unit by means of the reference model as a function of the ascertained temperature and the ascertained at least one aging characteristic value. The invention further relates to a corresponding device, to a corresponding electrical energy storage system, to a corresponding computer program, and to a corresponding machine-readable storage medium.

Description

technical field [0001] The invention is based on a method for determining the state of an electrical energy storage unit. Background technique [0002] In the course of the increasing electrification of vehicles, in particular, electrical energy storage units are becoming more and more important. In this case there are different levels of electrification. For example, there are purely electrically driven vehicles as well as vehicles with an internal combustion engine in which the electric machine only temporarily assumes the drive of the vehicle or supports the internal combustion engine. These different forms of electrification have typically different voltage levels and different technical solutions of the electrical energy storage units used. [0003] In future battery-electrically operated active working machines (batterie-elektrisch betriebenemobile Arbeitsmaschine), especially in excavators or wheel loaders, in addition to sufficient energy for the driving drive, for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/392G01R31/385G01R31/388G01R31/389G01D21/02
CPCG01D21/02G01R31/367G01R31/385G01R31/388G01R31/389G01R31/392
Inventor C·沃尔P·纳格尔
Owner ROBERT BOSCH GMBH
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