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Method and device for determining a battery status of a vehicle battery in a vehicle

A technology of battery status and battery charging, which is applied to measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as increased internal resistance, achieve the effect of reducing service costs and improving accuracy

Active Publication Date: 2015-04-29
ROBERT BOSCH GMBH
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  • Abstract
  • Description
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Problems solved by technology

At the same time, the internal resistance increases

Method used

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  • Method and device for determining a battery status of a vehicle battery in a vehicle
  • Method and device for determining a battery status of a vehicle battery in a vehicle

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Embodiment Construction

[0019] The method according to the invention or the device according to the invention makes it possible to measure or determine the battery state of a vehicle battery in a vehicle. The method according to the invention is particularly suitable for measuring capacity in hybrid electric vehicles (HEV) or in plug-in hybrid electric vehicles (PHEV). The method is independent of changes in battery performance due to aging. Aging of the vehicle battery can lead, for example, to a change in the idle voltage curve or a change in the impedance of the vehicle battery.

[0020] In the method, unknown influences on the battery state due to changes in idle voltage or vehicle battery impedance are excluded by sufficient measurements in the vehicle (between 0% state of charge and 100% state of charge). Only the hardware already available in the vehicle is used here.

[0021] figure 1 A flow chart of the method according to the invention in a first embodiment is shown. The method can be i...

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Abstract

A method and a device for determining a battery status of a vehicle battery in a vehicle. In this context, complete discharging (S1) of the vehicle battery by vehicle-internal loads of the vehicle, complete charging (S2) of the vehicle battery, measuring (S3) a capacity and / or an energy content of the vehicle battery during the charging of the vehicle battery, and determining (S4) the battery status by means of the capacity and / or the energy content of the vehicle battery take place. The inventive method and the inventive device are advantageous since no additional hardware, apart from the hardware which is otherwise also necessary in the user mode, and also no specialist personnel are necessary to obtain a regular determination of the battery status of a vehicle battery.

Description

technical field [0001] The invention relates to a method and a device for determining the battery state of a vehicle battery in a vehicle. Background technique [0002] Vehicle batteries used in automotive applications are subject to aging which changes the chemical and electrical characteristics of the vehicle battery. The capacity of vehicle batteries continues to decrease due to aging. At the same time, the internal resistance increases. The energy content therefore decreases more strongly as a percentage than the capacity. [0003] This has implications for the different algorithms implemented by the responsible battery management system and other systems that perform calculations based on the battery state, such as effective range calculations. Contents of the invention [0004] A method according to the invention for determining the battery state of a vehicle battery in a vehicle comprises: fully discharging the vehicle battery by a load inside the vehicle of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/387G01R31/392
Inventor M.吕格A.伯姆
Owner ROBERT BOSCH GMBH
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