Method for operating battery of parked motor vehicle, and motor vehicle

A technology for motor vehicles and batteries, applied in the power supply of auxiliary motors, electric vehicle charging technology, batteries, etc., to achieve low-cost, simple means, and the effect of reducing aging

Pending Publication Date: 2022-04-19
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is disadvantageous here to run only without an analysis of the active avoidance of battery aging

Method used

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  • Method for operating battery of parked motor vehicle, and motor vehicle
  • Method for operating battery of parked motor vehicle, and motor vehicle
  • Method for operating battery of parked motor vehicle, and motor vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Components with the same function and operating principle are in Figures 1 to 3 are provided with the same reference numerals accordingly.

[0038] exist figure 1 is schematically shown in diagram form in battery 1 (see figure 2 The relationship between the aging rate of ) and the state of charge of battery 1. As is evident from the graph, the aging rate of battery 1 increases only slightly from 0% to 60% state of charge. In other words, a greater state of charge of the battery 1 in this range causes only side reactions and thus a small increase in the aging of the battery 1 . In the segment between approximately 60% and 80%, a progressive increase in the aging rate depending on the state of charge can already be recognized. In the case of a state of charge above 80% of the maximum total charge of the battery 1, the ratio of the state of charge to the aging rate is almost exponential, so that in the case of a state of charge in this range a special performance of ...

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PUM

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Abstract

The invention relates to a method for operating a battery (1) of a parked motor vehicle (2), comprising the following steps: determining an operating state of the motor vehicle (2), determining a current state of charge of the battery (1) when the operating state of the motor vehicle (2) is a parked state, determining a first upper state of charge limit of the battery (1), and determining a second upper state of charge limit of the battery (1) when the current state of charge is greater than the first upper state of charge limit. A first active reduction of the state of charge of the battery (1) is determined, a second upper state-of-charge limit of the battery (1) is determined, and the first active reduction of the state of charge is terminated when the battery (1) is below the second upper state-of-charge limit. The invention further relates to a motor vehicle (2).

Description

technical field [0001] The invention relates to a method for operating a battery of a parked motor vehicle. Furthermore, the invention relates to a motor vehicle which is designed to carry out such a method. Background technique [0002] In the case of a motor vehicle with an electric motor for driving the motor vehicle, for example an electric vehicle or a full hybrid vehicle, the electrical energy necessary for operating the electric motor is usually provided by a battery. Modern batteries with a relatively high power density are based on lithium-ion technology and are therefore also referred to as lithium-ion batteries. [0003] A disadvantage of lithium-ion batteries is the loss of capacity with increasing service life. Such capacity loss is also referred to as "aging" of the battery. The aging process in the case of lithium-ion batteries can be influenced by different factors, especially by the state of charge of the battery, also known as "SOC" (English: State of Ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/13B60L58/16B60L58/26B60L55/00B60L3/12B60L1/00B60L1/14
CPCB60L58/13B60L58/16B60L58/26B60L55/00B60L3/12B60L1/003B60L1/00B60L1/14B60L2240/545B60L2240/54B60L15/2045B60L53/14B60L58/25H01M10/44Y02T10/64Y02T10/72Y02T10/7072Y02T90/14Y04S10/126Y02E60/00H01M10/48H01M2010/4271H01M10/425H01M2220/20H01M10/613H01M10/625H01M10/6561B60L58/15B60L1/16H01M10/443H01M10/486
Inventor M·施莱德B·伦贝格
Owner VOLKSWAGEN AG
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