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Adaptive method for determining the power that can be maximally outputted or absorbed by a battery

A battery and battery voltage technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as difficulty and insufficiency

Active Publication Date: 2012-11-14
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this approach is that because the complex behavior of electrochemical energy storage is partially nonlinear, it is not adequately described by simple models
On the contrary, complex models have a large number of free parameters, and it is very difficult to obtain these parameters accurately and independently of each other

Method used

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  • Adaptive method for determining the power that can be maximally outputted or absorbed by a battery
  • Adaptive method for determining the power that can be maximally outputted or absorbed by a battery

Examples

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Embodiment Construction

[0024] figure 1 An exemplary embodiment of a battery system according to the invention is shown. The accumulator 10 is equipped with a temperature sensor 11 which is installed as close as possible to at least one accumulator cell of the accumulator 10 in terms of spatial distance. The two battery poles of the battery 10 are connected to a voltage-measuring unit 12 which measures the respective given battery voltage. Arranged in one of the current paths of the battery is a current measuring unit 13 which measures the battery current flowing through the battery 10 . For example, current measuring unit 13 can be designed as a small and precisely known ohmic resistor of a second voltage measuring unit or as a Hall sensor. The temperature sensor 11 , the voltage measuring unit 12 and the current measuring unit 13 are connected to a controller 14 which monitors and characterizes the behavior of the battery 10 by implementing the method according to the invention for determining th...

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Abstract

The invention relates to a simple and robust method for determining the power that can be provided or absorbed by a battery, to a battery system with a controller for carrying out the method, and to a motor vehicle with such a battery system. The method has the following steps: determining a state variable of the battery, in particular a battery temperature and / or a charge condition (S101); determining a power that can be provided or absorbed by the battery during a specified load period using a table of power values and the state variable of the battery, said state variable of the battery being used as an access parameter for the table (S102); measuring a load of the battery using an operating parameter of the battery, in particular a battery current and / or a battery voltage (S103); measuring a load period in which the load of the battery is given (S103); comparing the measured load period with a comparison range that contains the specified load period (S104); and carrying out a correction routine if the load period lies in the comparison range (S105).

Description

technical field [0001] The invention relates to a method for determining the power that can be supplied or absorbed by a battery, a battery system designed to carry out the method, and a motor vehicle with such a battery system. Background technique [0002] A battery in a hybrid or electric vehicle using lithium-ion or nickel-metal hydride technology consisting of a large number of electrochemical battery cells connected in series. The battery management system is used to monitor the battery and, in addition to safety monitoring, should also provide the longest possible service life. For this purpose, the voltage of each individual battery cell as well as the battery current and the battery temperature are measured and a state estimation (eg estimation of the state of charge or aging of the battery) is carried out. In order to maximize the service life, it is helpful to recognize at any time the battery's currently given maximum power, ie the maximum electrical power that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/3693G01R31/3651G01R31/3606G01R31/3675G01R31/3647G01R31/367G01R31/374G01R31/382
Inventor A·伯姆J·韦伯
Owner ROBERT BOSCH GMBH