EP1806282A2 - Méthode de contrôle pour moteur électrique de bateaux - Google Patents

Méthode de contrôle pour moteur électrique de bateaux Download PDF

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Publication number
EP1806282A2
EP1806282A2 EP07000146A EP07000146A EP1806282A2 EP 1806282 A2 EP1806282 A2 EP 1806282A2 EP 07000146 A EP07000146 A EP 07000146A EP 07000146 A EP07000146 A EP 07000146A EP 1806282 A2 EP1806282 A2 EP 1806282A2
Authority
EP
European Patent Office
Prior art keywords
battery
voltage
current
boat
maximum current
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07000146A
Other languages
German (de)
English (en)
Other versions
EP1806282A3 (fr
Inventor
Friedrich Dr. Böbel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Torqeedo GmbH
Original Assignee
Torqeedo GmbH
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
Priority claimed from EP06003968A external-priority patent/EP1806281A1/fr
Application filed by Torqeedo GmbH filed Critical Torqeedo GmbH
Priority to EP07000146A priority Critical patent/EP1806282A3/fr
Publication of EP1806282A2 publication Critical patent/EP1806282A2/fr
Publication of EP1806282A3 publication Critical patent/EP1806282A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
    • B63H2021/216—Control means for engine or transmission, specially adapted for use on marine vessels using electric control means

Definitions

  • the invention relates to a method for increasing the range of a boat, which is driven by an electric boat engine, wherein the electric boat engine is powered by a battery, wherein at most a maximum current is withdrawn from the battery. Further, the invention relates to a device for increasing the range of a boat, which is driven by an electric boat engine, wherein the electric boat engine is powered by a battery, comprising a current limiting unit for limiting the current drawn by the battery to a Maximum power as well as a boat with an electric boat engine and a battery, which supplies the electric boat engine with electricity.
  • batteries are comparatively large and heavy, so that only a limited number of batteries can be accommodated on the boat. Accordingly, the range of an electrically powered boat is limited by the capacity of the battery.
  • the remaining capacity of the battery should always be so great that the boat still reaches a safe point of contact, for example a harbor, and does not drive maneuverable on the water.
  • Object of the present invention is therefore to show a method and apparatus for controlling an electric boat engine, which allows for a given residual capacity of the battery increased residual range of the boat.
  • This object is achieved by a method of the type mentioned above, wherein the battery voltage is measured and the maximum current is reduced when the battery voltage falls below a threshold voltage.
  • the inventive device for increasing the range of a boat, which is driven by an electric boat engine, wherein the electric boat engine is powered by a battery comprising a current limiting unit for limiting the current drawn by the battery to a maximum current, thereby characterized in that a voltage measuring device for determining the battery voltage and a voltage measuring device connected to the control unit are provided, wherein the control unit compares the battery voltage with a limit voltage and in the event that the battery voltage is lower than the limit voltage, the current limiting unit drives and reduces the maximum current.
  • the invention is based on the recognition that the battery voltage can be used as an indicator of the residual capacity. It has been determined that the battery voltage depends on the one hand on the state of charge of the battery, on the other hand from the current drain. After the charging process, the battery voltage has a maximum value, hereinafter referred to as LadeendLite. As the battery discharges, the battery voltage slowly drops until the voltage collapses. The battery voltage is also dependent on the current drain. The larger the current drawn by the battery, the lower the battery voltage.
  • This dual dependence of the battery voltage on the state of charge of the battery on the one hand, from the current drain on the other hand, is used according to the invention to increase the remaining range of an electric motor boat, the electric motor is powered by a battery.
  • the battery voltage is measured and compared with a predetermined value, hereinafter referred to as the limit voltage. If the current battery voltage falls below the limit voltage, this is an indicator of a low residual capacity of the battery. According to the invention, the electric motor is switched to a more economical driving style in this case.
  • the maximum current drawn from the battery is limited to a maximum current which is lower than the maximum previously drawn from the battery power.
  • the maximum current is again reduced when the limit voltage is undershot again. This can be done several times, so that the electric motor is gradually switched to an ever slower and more economical driving.
  • the current drain is limited to this new maximum current until the battery voltage drops below the second lower limit voltage. Then there is a further reduction of the maximum current.
  • the inventive method is particularly suitable for controlling electric boat engines that are powered by high-current batteries, especially lithium batteries, most preferably by a lithium-manganese battery.
  • batteries such as lithium manganese batteries
  • batteries are irreversibly damaged if the battery voltage falls below a minimum value. It is therefore of advantage, when falling below a predetermined minimum voltage to completely interrupt the flow of current from the battery, that is, in particular to turn off the electric boat engine.
  • the minimum voltage is chosen so large that no damage to the battery occur.
  • the lithium-manganese battery is used to power a boat electric motor, in particular for supplying an electronically commutated synchronous motor.
  • the battery After charging, the battery has a final charge voltage of 4.2 V.
  • the rated voltage of the lithium-manganese cells is 3.7 V.
  • the boat engine is initially operated with a charged battery with a maximum current of 1 C, that is, with a battery capacity of for example, 100 Ah, at most a current of 100 A is subtracted.
  • the battery voltage is constantly monitored during engine operation. If the battery voltage falls below a predetermined threshold voltage of 3.0 V, then this is on Signs that the capacity of the battery will soon be exhausted while maintaining a high current drain. According to the invention, therefore, at this point A, the maximum current to be taken from the battery is limited to 0.1 ° C. This means that the electric motor is switched to a slower but more economical drive.
  • the engine will be switched off for safety reasons to avoid complete discharge and damage to the batteries.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP07000146A 2006-01-05 2007-01-04 Méthode de contrôle pour moteur électrique de bateaux Withdrawn EP1806282A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07000146A EP1806282A3 (fr) 2006-01-05 2007-01-04 Méthode de contrôle pour moteur électrique de bateaux

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006001009 2006-01-05
EP06003968A EP1806281A1 (fr) 2006-01-05 2006-02-27 Méthode de régulation d'un moteur électrique pour bateau
EP07000146A EP1806282A3 (fr) 2006-01-05 2007-01-04 Méthode de contrôle pour moteur électrique de bateaux

Publications (2)

Publication Number Publication Date
EP1806282A2 true EP1806282A2 (fr) 2007-07-11
EP1806282A3 EP1806282A3 (fr) 2008-10-15

Family

ID=37989041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07000146A Withdrawn EP1806282A3 (fr) 2006-01-05 2007-01-04 Méthode de contrôle pour moteur électrique de bateaux

Country Status (1)

Country Link
EP (1) EP1806282A3 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10257605A (ja) * 1997-03-12 1998-09-25 Isuzu Motors Ltd 電気自動車制御装置
JPH11164488A (ja) * 1997-11-26 1999-06-18 Yamaha Motor Co Ltd 電動車両のバッテリ充放電管理装置
JP2001339867A (ja) * 2000-05-30 2001-12-07 Sanyo Electric Co Ltd 電池とモーターを内蔵する電気機器
US6507164B1 (en) * 2001-04-20 2003-01-14 Brunswick Corporation Current based power management for a trolling motor
US6659815B2 (en) * 2001-06-11 2003-12-09 Maruta Electric Boatworks Llc Efficient motors and controls for watercraft

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
EP1806282A3 (fr) 2008-10-15

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