WO2022089846A1 - Procédé de surveillance d'état de santé de batterie d'un véhicule - Google Patents

Procédé de surveillance d'état de santé de batterie d'un véhicule Download PDF

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Publication number
WO2022089846A1
WO2022089846A1 PCT/EP2021/076085 EP2021076085W WO2022089846A1 WO 2022089846 A1 WO2022089846 A1 WO 2022089846A1 EP 2021076085 W EP2021076085 W EP 2021076085W WO 2022089846 A1 WO2022089846 A1 WO 2022089846A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
vehicle
health
control unit
monitor
Prior art date
Application number
PCT/EP2021/076085
Other languages
English (en)
Inventor
Krishna Ramakrishna Divya
Umesh Kamat Sumalata
Original Assignee
Robert Bosch Gmbh
Bosch Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh, Bosch Limited filed Critical Robert Bosch Gmbh
Priority to CN202180073040.7A priority Critical patent/CN116547546A/zh
Publication of WO2022089846A1 publication Critical patent/WO2022089846A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3647—Constructional arrangements for determining the ability of a battery to perform a critical function, e.g. cranking
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements

Definitions

  • the present invention relates to a method to monitor battery health of a vehicle and an Electronic Control Unit (ECU) thereof.
  • ECU Electronic Control Unit
  • Modern day vehicles both automotive and electric, include a battery.
  • the battery is used to power the electrical system when the engine is not running. Additionally, the engine is used to charge the battery. The engine is also used to power electrical components of the vehicle when the engine is running.
  • State of health of a battery defines the performance of a battery relative to its original condition. Conventional methods for determining battery state of health typically involve discharging batteries at constant current to predefined voltages. Such methods are not only expensive and time consuming, but also require the batteries under test to be out of service for long periods of time. There are no in- vehicle prognostic methods to detect degradation or predict an imminent failure of a vehicle battery. Accordingly, there is a need for a simple and robust method to monitor battery health in a vehicle.
  • Patent application WO2009158224A2 titled “Method for battery state-of- health monitoring using battery voltage during vehicle starting” discloses a method for determining a battery's state-of -health.
  • An initial battery voltage is measured after a first voltage drop during an initiation of an engine cranking phase.
  • a battery voltage is monitored during the remainder of the engine cranking phase.
  • a lowest battery voltage is determined during the remainder of the engine cranking phase.
  • a determination is made if a voltage difference between the lowest battery voltage and the initial battery voltage at the initiation of the engine cranking phase is less than a voltage threshold.
  • a low battery state-of-health is identified in response to the voltage difference being less than the voltage threshold.
  • Figure 1 depicts a vehicle battery (102) in a vehicle in accordance with one of the embodiments of this invention
  • Figure 2 illustrates method steps (200) to monitor battery health of a vehicle in accordance with this invention
  • Figure 3 is a graphical representation of battery voltage with respect time for a new and old battery.
  • Figure 4 is a graphical representation of area under curve in a battery voltage vs time graph for a new and old battery.
  • FIG 1 depicts a vehicle battery (102) in a vehicle in accordance with one of the embodiments of this invention.
  • the battery (102) is in communication with a control unit (101) in the vehicle.
  • the battery (102) is also connected to other vehicle loads (104) such as a starter motor, lamps, air conditioner and the like.
  • a voltage sensor (103) configured to measure voltage across the battery (102) is connected to the battery (102).
  • the voltage sensor (103) is also in communication with the control unit (101).
  • the voltage sensor is dispensable and the control unit (101) itself can read the voltage across the battery (102).
  • the control unit (101) comprises a processing means, a communicating means and at least a memory.
  • the communicating means is capable of connecting to a cloud or a server.
  • the control unit (101) is implemented as a combination of hardware and software i.e. some building blocks are hardcoded onto a microprocessor chip while other building block are implemented in a software which may either reside in a microprocessor chip or on a cloud (105).
  • a plurality of mobile devices (107) such as a mobile phones, tablets, computers and the like having a user interface can be connected to the cloud (105) and retrieve information from it.
  • the control unit (101) is connected to onboard lamps (106) for indicating the health of the battery (102).
  • FIG. 2 illustrates method steps to monitor battery health of a vehicle in accordance with this invention.
  • the method step 201 comprises cranking the vehicle at least two times within a duration of minute. The main idea of using multiple consecutive cranks is to ensure that the battery (102) charge is depleted.
  • the control unit (101) is adapted to monitor health of the battery (102).
  • the control unit (101) monitors health of the battery (102) in a test case.
  • the test case mode is switched on and once it detects cranking of the vehicle at least two times within a duration of minute, the control unit is activated.
  • Method step 202 comprises recording a real time value of battery voltage with respect to time measured by the battery (102) voltage sensor (103) by the control unit (101). This recording of real time values includes keeping the vehicle in no load or a constant load condition for least 10 seconds after the last crank.
  • Method step 203 comprises comparing the said recorded value with a stored reference value.
  • the stored reference value refers to a pre-determined values of battery voltage with respect to time. These values are determined based on experimental value and data recorded for a different states of health of a battery (102) after at least two cranks within a duration of one minute.
  • the comparison take place inside the processor of the control unit (101).
  • the control unit (101) merely acts a telematics device that records and communicates the data to a cloud (105) or a server.
  • Method step 204 comprises indicating the health of the battery (102) based on the said comparison.
  • Indicating the health of the battery (102) comprises an audio or visual means of indication.
  • the audio-visual means of indication can be in the form of an onboard diagnostics lamp on the vehicle.
  • the audio-visual means of indication are present on a mobile device having access to the cloud (105).
  • Time Period “T” indicates the time period for wherein the vehicle is kept in no load or a constant load condition for recording the real time values. This time period as described earlier is at least 10 seconds and varies according to the vehicle and the type of starter motor is use.
  • Figure 5 is a graphical representation of area under curve in a battery (102) voltage vs time graph for a new and old battery.
  • Area under the curve of the battery (102) voltage vs time is one of the ways of capturing the essence of the data conveyed by the battery (102) voltage vs time graph. The greater area under this curve corresponds to more time needed by the battery (102) voltage to stabilize after the last cranking, thereby corresponding to a relatively more degraded state of the battery (102).
  • equation and slope comparison or any statistical techniques also can be used for data analysis and result derivation.
  • This idea to develop a method to monitor battery health of a vehicle and a control unit (101) thereof provides a simple and robust technique to detect health of the vehicle battery (102) that is independent of state of charge (SOC) level of battery.
  • the method can be implemented independent of vehicle/ variant/ user/region/type of data logger used as long as battery voltage data is available for analysis. Further the method doesn’t need any usage of external power sources, sensors or any measurement devices other than an control unit (101) for data logging, processing or an control unit (101) capable of data logging and communicating with a cloud (105) or server.
  • the disclosed method has benefits over the conventional method used.
  • Conventional methods measure only open circuit voltage will not be sufficient for indicating whether the battery (102) is new or old. This idea will not accurately indicate the battery (102) state based on data evaluation post cranking, but also help fleet manager of vehicles and service centers I dealers will not know if the replaced battery is new or refurbished.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Abstract

La présente invention concerne des étapes de procédé permettant de surveiller l'état de santé d'une batterie d'un véhicule. L'étape de procédé 201 consiste à démarrer le véhicule au moins deux fois au cours d'une durée d'une minute. L'étape 202 consiste à enregistrer une valeur en temps réel de tension de batterie par rapport au temps mesuré par le capteur de tension de batterie (102) par l'unité de commande (101). L'étape 203 consiste à comparer ladite valeur enregistrée à une valeur de référence stockée. La valeur de référence stockée se réfère à des valeurs prédéterminées de tension de batterie par rapport au temps. L'étape 204 consiste à indiquer l'état de santé de la batterie (102) en fonction de ladite comparaison.
PCT/EP2021/076085 2020-10-27 2021-09-22 Procédé de surveillance d'état de santé de batterie d'un véhicule WO2022089846A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202180073040.7A CN116547546A (zh) 2020-10-27 2021-09-22 一种监测车辆的电池健康的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041046718 2020-10-27
IN202041046718 2020-10-27

Publications (1)

Publication Number Publication Date
WO2022089846A1 true WO2022089846A1 (fr) 2022-05-05

Family

ID=77951743

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/076085 WO2022089846A1 (fr) 2020-10-27 2021-09-22 Procédé de surveillance d'état de santé de batterie d'un véhicule

Country Status (2)

Country Link
CN (1) CN116547546A (fr)
WO (1) WO2022089846A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009158224A2 (fr) 2008-06-27 2009-12-30 Gm Global Technology Operations, Inc. Procédé permettant de surveiller l'état de santé d'une batterie sur la base de la tension de la batterie au démarrage du véhicule

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009158224A2 (fr) 2008-06-27 2009-12-30 Gm Global Technology Operations, Inc. Procédé permettant de surveiller l'état de santé d'une batterie sur la base de la tension de la batterie au démarrage du véhicule

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J OTJENS: "A battery's heartbeat, How to estimate the state of health of an online battery by use of non-invasive measuring methods", 10 January 2017 (2017-01-10), TU Delft Repository, pages 1 - 104, XP055571875, Retrieved from the Internet <URL:https://repository.tudelft.nl/islandora/object/uuid:fa46fa4a-0241-4aee-82a2-2e2e557b1230/datastream/OBJ/download> [retrieved on 20190320] *

Also Published As

Publication number Publication date
CN116547546A (zh) 2023-08-04

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