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Method for determining the open-circuit voltage of a battery, battery with a module for determining the open-circuit voltage, and motor vehicle with a corresponding battery

一种开路电压、蓄电池的技术，应用在电动汽车、测量电、测量电变量等方向，能够解决不能获取开路电压、开路电压结构变化等问题，达到减少计算开支和资源需求、准确充电状态、高经济性的效果

Active Publication Date: 2016-06-29
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to aging, for example, in the case of different degrees of aging of the anode and cathode of the battery cell, there will be structural changes in the open circuit voltage
Therefore, the varying open-circuit voltage in the actual system cannot be reliably detected by means of the vehicle's battery management system

Method used

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  • Method for determining the open-circuit voltage of a battery, battery with a module for determining the open-circuit voltage, and motor vehicle with a corresponding battery
  • Method for determining the open-circuit voltage of a battery, battery with a module for determining the open-circuit voltage, and motor vehicle with a corresponding battery
  • Method for determining the open-circuit voltage of a battery, battery with a module for determining the open-circuit voltage, and motor vehicle with a corresponding battery

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Embodiment Construction

[0028] To monitor the battery, a battery management system is provided, which monitors the battery 110 using a control-technical observation structure 100 via a battery cell model 120 and determines the state of the actual system by adapting the model parameters.

[0029] figure 1 Such a viewing structure 100 is shown. Via this observation structure 100 , the actual system battery 110 is observed via the battery cell model 120 and the state of the actual system is tracked by adapting the model parameters. The core of the observer 130 used in the observation structure 100 is the battery cell model 120, which in principle has figure 2 structure shown.

[0030] In an exemplary embodiment of such an observer 130 , the actual system battery 110 is observed via a battery cell model 120 in order to estimate the state of charge 180 and to monitor the state of aging 190 , wherein the battery current I Batt 140. Battery temperature T Batt 150. Battery voltage U Batt 160 and the mo...

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Abstract

The invention relates to a method for determining the open circuit voltage (OCV) of a battery, a battery with a module for determining the open circuit voltage, and a motor vehicle with a corresponding battery, which can be used in particular to determine Aging-related open-circuit voltage of the battery pack used. For this purpose it is proposed to determine the open circuit voltage during the charging process of the accumulator ( 110 ). Furthermore, a battery ( 110 ) with a module for determining the open circuit voltage of the battery ( 110 ) and a vehicle with such a battery ( 110 ) are proposed.

Description

technical field [0001] The invention relates to a method for determining the open-circuit voltage (OpenCircuitVoltage-OCV) of a battery, a battery with a module for determining the open-circuit voltage and a motor vehicle with a corresponding battery, which can be used in particular to determine the The aging-related open-circuit voltage of the battery pack. Background technique [0002] A battery or battery pack consisting of a large number of electrochemical battery cells connected in series in lithium-ion or nickel-metal hydride technology is used in hybrid and electric vehicles. [0003] To monitor the battery, a battery management system (BMS) is provided which, in addition to safety monitoring, is also intended to ensure the longest possible service life. [0004] For this purpose, the voltage of each individual battery cell is measured by the battery management system together with the battery current and the battery temperature and a state estimation is carried out ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
CPCG01R31/367B60L53/00Y02T10/70Y02T10/7072Y02T90/14
Inventor A·伯姆S·维克特
Owner ROBERT BOSCH GMBH