EP1997168A1 - Energiespeichersystem - Google Patents
EnergiespeichersystemInfo
- Publication number
- EP1997168A1 EP1997168A1 EP07721940A EP07721940A EP1997168A1 EP 1997168 A1 EP1997168 A1 EP 1997168A1 EP 07721940 A EP07721940 A EP 07721940A EP 07721940 A EP07721940 A EP 07721940A EP 1997168 A1 EP1997168 A1 EP 1997168A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- energy storage
- current
- limiting component
- storage system
- short
- 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- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the invention relates to an energy storage system with an energy storage.
- the hybrid drive of a motor vehicle is the combination of different drive principles or different energy sources for a drive application within an application.
- the combustion engine can stop at standstill
- hybrid system is possible as a mild hybrid, when an alternative drive form only serves to support the main drive form.
- a full hybrid is the version of a hybrid system in which each of the available drive forms is capable of autonomous action.
- a further increase of the hybrid system is realized in the so-called power hybrid.
- a variant of the hybrid vehicle is a combination of a
- the internal combustion engine with one or more electric motors running.
- the internal combustion engine can be operated in hybrid drive in a very low efficiency range. Any surplus energy is used by a generator for the electrical charging of the battery. At the
- Accelerating combustion engine and electric motor work together. With the same acceleration achieved so can a smaller internal combustion engine can be provided.
- the reduction of the internal combustion engine compensates in part for the additional weight of the hybrid units.
- a hybrid vehicle has at least one energy store.
- the energy from this energy storage can be used to start the engine, for the electrical consumers in the vehicle and for driving.
- recuperation During braking and coasting, part of the braking energy is fed back into the battery, called recuperation. Especially in city traffic and when driving downhill, recovery helps reduce fuel consumption. Another advantage of this design is that it can be dispensed with a conventional starter, since the electric motor can take over this function.
- An internal combustion engine delivers high torque in an elevated speed range.
- the electric motor on the other hand, already provides the maximum torque during start-up and allows the torque to decrease at higher speeds.
- the torque curves complement each other in an advantageous manner and the vehicle can accelerate in current interpretations by about 10% to 30% faster.
- the hybrid vehicle has a gasoline engine and an electric motor, which are coupled to the drive axle via a planetary gearing.
- driving with constant load drives only the gasoline engine, the vehicle while the energy storage is simultaneously charged by the gasoline engine via the generator. At heavier load, the vehicle is driven jointly by both engines. During engine braking, energy can be recuperated.
- the energy savings compared to gasoline-powered vehicles of the same vehicle class are up to 30%, depending on the driving cycle.
- a version with a recharging option on the power grid and a larger electrical range has so far only been realized as a prototype (plug-in hybrid).
- the drive of the hybrid vehicle in addition to the gasoline engine comprises two electric motors, one on the front and on the rear axle.
- the overall performance of such a model can currently be over 300 kW, the power distribution being designed, for example, such that the gasoline engine contributes 47% to the total power, the electric motor, which drives the front axle, 38%, as well as the rear axle Electric motor 15%.
- the engine power can not be added because the battery can only give a limited power.
- Another design of the drive system provides that the electric motor is not seated on an axle, but is coupled to a drive train between the engine and the transmission.
- the electric motor In order for the electric machine to perform a function as an electric drive, it must obtain the necessary electrical energy from an energy store. The energy storage must be charged constantly. The recharging takes place via the mentioned recuperation in braking and coasting mode or via the energy supplied by the internal combustion engine, with high currents occurring.
- the invention has for its object to provide a Energyspei- chersystem of the type mentioned, which helps to increase the reliability in a hybrid vehicle.
- This object is achieved according to the invention by associating with the energy store a short-circuit protection element which is connected electrically in series with a current-limiting component.
- the invention is based on the consideration that due to a malfunction short-circuit currents of several thousand amperes can occur due to the use of a high-energy storage device in an energy storage system of a hybrid vehicle. For example, already in use lithium-ion cells reach short-circuit currents of 2500 amperes.
- fuses for this purpose are designed predominantly up to a short-circuit current of 2000 amperes. This limitation also applies to other components used in an energy storage system such as contactors or connectors. According to experience, contactors can become clogged or flutter when high currents, such as short-circuit currents, occur.
- a resistor is advantageously provided as a current-limiting component.
- the power supply cable of the energy storage advantageously a predetermined, the design of the overall system corresponding to the desired resistance.
- the electrical cell connector to avoid the inclusion of additional components in the series circuit and thus avoid additional possible sources of error and increased costs, advantageously designed as a current-limiting component with a predetermined design-related nominal resistance.
- the current-limiting component expediently has a corresponding non-linear resistance characteristic over the temperature.
- an inductance is advantageously provided as a current-limiting component.
- the advantages achieved by the invention are in particular that the reliability of the hybrid vehicle is significantly increased by the fact that reliably triggers a fuse, for example, by combining a passive with a current-limiting component.
- the current must be kept in a range above a predetermined value, which represents the threshold for triggering the fuse.
- cheaper dimensioned and less expensive components can be used in the energy storage system.
- the vehicle electrical system 1 of a motor vehicle usually exhibits the following current profile:
- This generator supplies the electrical energy for the entire electrical system. This includes a number of consumers 6.
- the electrical energy which is not required for the operation of the motor vehicle and the associated consumers 6 is fed into the energy storage system 8 for later use in the energy storage system 8.
- the energy storage 8 of the energy storage system 10 is designed with a particularly high capacity to store the necessary electrical energy for the operation of the hybrid vehicle with the electric motor 12 and to keep it on call.
- the electrical energy is passed from the energy storage system 10 via a fuse 14 so that, for example, short circuit currents can not get into the electrical system 1 and / or to the consumers 6.
- a fuse 14 instead of a fuse 14, a combination of a fuse and a contactor can be used.
- a contactor is operated with low resistance, therefore the limitation of a possibly occurring short-circuit current is very important. If a higher current flows to the contactor, this can cause fluttering and, in the worst case, the contactor sticking together.
- a resistor 16 is introduced, which effectively limits a possibly occurring short-circuit current, so that the intended fuse triggers reliable.
- the resistor 16 acts as a current-limiting component.
- an inductance can be integrated into the circuit at this point in the course of the electrical system 1, ie in series with the fuse 14, since this inductance only absorbs the peak of a short-circuit current, the so-called peak, but otherwise the flowing currents not limited how an ohmic resistor 16 would do this. Since a short-circuit current, which can be up to 2000 amperes, in special design-related cases even more, usually occurs in a time interval of only a few hundredths of a second, it is sufficient to maintain the reliability of the hybrid vehicle, if only the said peaks of possibly occurring short-circuit currents are avoided, so that the inductance is aligned exclusively on the prevention of damaging short-circuit current.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006013135 | 2006-03-20 | ||
PCT/DE2007/000325 WO2007110015A1 (de) | 2006-03-20 | 2007-02-21 | Energiespeichersystem |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1997168A1 true EP1997168A1 (de) | 2008-12-03 |
Family
ID=38267624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07721940A Withdrawn EP1997168A1 (de) | 2006-03-20 | 2007-02-21 | Energiespeichersystem |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090052104A1 (de) |
EP (1) | EP1997168A1 (de) |
DE (1) | DE112007000043A5 (de) |
WO (1) | WO2007110015A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008010823A1 (de) * | 2008-02-23 | 2009-08-27 | Daimler Ag | Batterie mit mehreren einen Zellverbund bildenden Flachzellen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4680527A (en) * | 1986-08-06 | 1987-07-14 | Motorola, Inc. | Electrical battery including apparatus for current sensing |
US5394094A (en) * | 1993-05-13 | 1995-02-28 | Industrial Scientific Corporation | Portable gas sensor utilizing fault protective battery cap |
US5633573A (en) * | 1994-11-10 | 1997-05-27 | Duracell, Inc. | Battery pack having a processor controlled battery operating system |
US6331763B1 (en) * | 1998-04-15 | 2001-12-18 | Tyco Electronics Corporation | Devices and methods for protection of rechargeable elements |
KR20010103998A (ko) * | 2000-05-12 | 2001-11-24 | 이계안 | 하이브리드 전기 자동차의 누전 차단장치 및 그 제어방법 |
US6664762B2 (en) * | 2001-08-21 | 2003-12-16 | Power Designers, Llc | High voltage battery charger |
US6879140B2 (en) * | 2002-09-26 | 2005-04-12 | Mks Instruments, Inc. | Power holdup circuit |
JP4254227B2 (ja) * | 2002-11-28 | 2009-04-15 | ソニー株式会社 | バッテリーパック |
-
2007
- 2007-02-21 WO PCT/DE2007/000325 patent/WO2007110015A1/de active Application Filing
- 2007-02-21 EP EP07721940A patent/EP1997168A1/de not_active Withdrawn
- 2007-02-21 US US12/282,561 patent/US20090052104A1/en not_active Abandoned
- 2007-02-21 DE DE112007000043T patent/DE112007000043A5/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2007110015A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE112007000043A5 (de) | 2008-07-03 |
US20090052104A1 (en) | 2009-02-26 |
WO2007110015A1 (de) | 2007-10-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20080320 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: RUDORFF, AXEL Inventor name: BIRKE, PETER Inventor name: KELLER, MICHAEL |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR |
|
17Q | First examination report despatched |
Effective date: 20090616 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20091010 |