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Electric Or Hybrid Vehicle Battery Pack Voltage Measurement

A technology for battery packs and vehicles, applied in electric vehicle charging technology, electric vehicles, measuring current/voltage, etc., can solve problems affecting control functions, expensive hardware solutions, etc., and achieve the effect of improving accuracy

Inactive Publication Date: 2017-03-08
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the required battery pack voltage measurement range usually results in a compromise on measurement accuracy to provide acceptable cost and complexity of the system for mass production
The accuracy of battery pack voltage measurements across the operating range can affect vari

Method used

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  • Electric Or Hybrid Vehicle Battery Pack Voltage Measurement
  • Electric Or Hybrid Vehicle Battery Pack Voltage Measurement
  • Electric Or Hybrid Vehicle Battery Pack Voltage Measurement

Examples

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[0025] Specific embodiments are disclosed herein as required; however, it should be understood that the disclosed embodiments only represent the claimed subject matter, and can be implemented in various and alternative forms. The drawings are not necessarily drawn to scale; some features may be exaggerated or minimized to show details of specific components. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to utilize the embodiments in various forms. As those of ordinary skill in the art will understand, various features shown and described with reference to any one of the drawings may be combined with features shown in one or more other drawings to produce embodiments that are not explicitly shown or described. The combinations of features shown provide representative embodiments for typical applications. However, various combinations and m...

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Abstract

The invention provides an electric or hybrid vehicle battery pack voltage measurement. Systems and methods for measuring voltage of a battery pack for an electrified vehicle, such as an electric or hybrid vehicle, include measuring individual cell voltages and using the individual measurements to periodically update an adjustment or offset applied to the battery pack measurement to improve accuracy of the battery pack measurement. Individual cell voltage measurements may be periodically sampled and combined with the result compared to the pack voltage under predetermined operating conditions, such as when voltage changes or variation are small. A sliding window of voltage differences that satisfy one or more specified conditions, such as being within a range of a previously determined value, may be used to generate the adjustment or offset.

Description

technical field [0001] Aspects of the present disclosure relate to systems and methods for improving the accuracy of battery pack voltage measurements of electrified vehicles, such as electric vehicles and hybrid vehicles. Background technique [0002] Electrified vehicles, such as electric vehicles and hybrid vehicles, include a battery pack (also known as a traction battery or traction battery pack) and an electric machine to propel the vehicle. Hybrid vehicles include an internal combustion engine that may be used to charge a battery pack and / or in combination with an electric machine to propel the vehicle. A traction battery pack includes a plurality of individual battery cells connected to each other to provide electrical power to the vehicle. A battery management system (BMS) in an electrified vehicle measures the voltage of the traction battery pack as well as the voltage of the individual battery cells. Battery pack voltage is often used in many aspects of vehicle ...

Claims

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Application Information

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IPC IPC(8): B60L11/18G01R19/10G01R19/165
CPCB60L58/20B60L3/0046G01R19/10G01R19/16542B60L3/0038Y02T10/7072Y02T90/14H02J7/0016G01R31/396B60L53/14B60L58/13B60L58/22B60L58/24G01R31/3835Y02T10/70H02J7/0014H02J7/0048B60L58/21
Inventor 迈克尔·爱德华·洛夫特斯王旭本杰明·A·塔巴托斯基·布什
Owner FORD GLOBAL TECH LLC
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