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Apparatus and method for enabling SOC estimation in hybrid vehicle electric energy storage system

A technology for hybrid electric vehicles and electric energy storage systems, applied in the field of computer programs and computer readable media, and state of charge estimation, which can solve the problems of increasing the complexity of hybrid electric vehicles and the risk and cost of component failures, etc.

Pending Publication Date: 2022-05-31
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, purchasing such an external charger is expensive and unnecessary when combustion engines and electric motors are already available in hybrid vehicles
Adding an external charger also increases hybrid vehicle complexity and risk of component failure

Method used

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  • Apparatus and method for enabling SOC estimation in hybrid vehicle electric energy storage system
  • Apparatus and method for enabling SOC estimation in hybrid vehicle electric energy storage system
  • Apparatus and method for enabling SOC estimation in hybrid vehicle electric energy storage system

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Embodiment Construction

[0035] As mentioned above, there is a problem that SOC calibration cannot be performed automatically, eg when the hybrid vehicle is not turned off for a sufficient period of time, which results in the need to connect an external charger to perform the calibration SOC algorithm. The present invention performs SOC calibration of the SOC algorithm. A SOC algorithm can be described as a method for estimating SOC. SOC calibration may be referred to as resetting the SOC algorithm of the at least one battery cell. The result of calibrating the SOC algorithm can be described as placing the at least one battery cell in a state of charge that is a suitable starting point for performing SOC estimation. The calibration of the SOC algorithm is performed by first charging the at least one battery cell to a first voltage level using an electric motor powered from a combustion engine. When the first voltage level is reached, fuel injection to the combustion engine is stopped, and the electr...

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PUM

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Abstract

An apparatus and method for enabling SOC estimation in an electrical energy storage system of a hybrid vehicle are provided, in particular, the present invention relates to a method performed by an apparatus (200) to enable SOC estimation of at least one battery cell (203) in an electrical energy storage system (201) of a hybrid vehicle (100). The device (200) initiates charging the battery cell (203) to a first voltage level (a). The battery cells (203) are charged by an electric machine (205) powered by a combustion engine (208). The device (200) detects that the first voltage level (a) is reached, initiating a stop of injecting fuel to the combustion engine (208). The device initiates a discharge of the at least one battery cell to a second voltage level (b). The device (200) detects that the battery cell (203) has been discharged to a second voltage level (b). The SOC estimation of the battery cell (203) is enabled when the second voltage level (b) has been reached.

Description

technical field [0001] The present invention relates to an apparatus, a method performed by the apparatus, a hybrid vehicle including the apparatus, a computer program and a computer-readable medium. More particularly, the present invention relates to state-of-charge (SOC) estimation of at least one battery cell included in an electrical energy storage system of a hybrid-enabled vehicle. [0002] The present invention can be applied to hybrid vehicles (also known as partially electric vehicles), such as heavy duty vehicles such as trucks, buses, construction equipment, and the like. Although the invention will be described with respect to a hybrid truck, the invention is not limited to this particular vehicle, but may also be used in applications such as buses, trailers, wheel loaders, articulated haulers, excavators, backhoe loaders, passenger Used in other vehicles such as cars and marine ships. It can also be used, for example, in electrical systems of hybrid ships and in...

Claims

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Application Information

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IPC IPC(8): B60W20/13
CPCB60W20/13B60W2510/244B60W2300/125B60W2300/10B60W2300/17B60L50/61B60L58/12B60L58/10B60L2240/547B60W10/06B60W10/08B60W10/26
Inventor 西蒙·布律内汤米·耶勒
Owner VOLVO LASTVAGNAR AB